Home

Friedrich 9 Air Conditioner User Manual

1. Warranty All service work must be done by a qualified servicer See Product Warranty and consult your dealer or contractor for details 26 SEALED REFRIGERATION SYSTEM REPAIRS IMPORTANT ANY SEALED SYSTEM REPAIRS TO COOL ONLY MODELS REQUIRE THE INSTALLATION OF A LIQUID LINE DRIER ALSO ANY SEALED SYSTEM REPAIRS TO HEAT PUMP MODELS REQUIRE THE INSTALLATION OF A SUCTION LINE DRIER EQUIPMENT REQUIRED 1 Voltmeter 2 Ammeter 3 Ohmmeter 4 E P A Approved Refrigerant Recovery System 5 Vacuum Pump capable of 200 microns or less vacuum 9 Acetylene Welder 7 Electronic Halogen Leak Detector G E Type H 6 or equivalent 8 Accurate refrigerant charge measuring device such as a Balance Scales 1 2 oz accuracy b Charging Board 1 2 oz accuracy WARNING RISK OF ELECTRIC SHOCK Unplug and or disconnect all electrical power to the unit before performing inspections maintenances or service Failure to do so could result in electric shock serious injury or death A WARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refrigerants Failure to follow these procedures could result in serious injury or death Refrigerant Charging Proper refrigerant charge is essential to proper unit opera tion Operating a unit wi
2. 1109 HO 4 109 19 u pezibaueu3 SS3NMVH 1 15 1 403 QN39311 QN3931 1 TRANSFORMER THERMOSTAT CONNECTIONS RELAY 4 RELAY 5 RELAY 6 WIRING DIAGRAM COOL lt I 1 x N N N lt gt 48 HEAT PUMP WITH ELECTRIC HEAT ELECTRICAL amp THERMOSTAT WIRING DIAGRAM VHA 24 with 7 5 KW and 10KW ELECTRIC HEAT THERMISTORS 1 16 1 speeds lt 1 upj ubiH 1109 uoJ JO 1109 19 bunoeu pezibueu3 Buissaaay 8 PUN 4044 SS3NHVH 1 15 1 04 QN3911 ON 1 QN3911 THERMOSTAT CONNECTIONS TRANSFORMER RELAY 6 RELAY 3 WIRING DIAGRAM HEAT PUMP W 7 5 KW 10KW ELE HEAT VHA24 49 RESISTANCE VALUES FOR THERMISTORS ELECTRONIC CONTROL BOARD Outdoor Coil 115 239 0 24 0 25 0 26 120 248 0 21 0 22 9 23 Return Indoor Coil Return air sensor reisitance Ohm Indoor coil sensor resistence Ohm CENTER 308 84 315 28 231 44 235 66 175 05 T4 2 27 ACCESSORIES MODEL VPAWP1 8 VPAWP1 14 VPDP1 24 000 BTU ONLY
3. 6 Protectnew valve body from heat while brazing with plastic heat sink Thermo Trap or wrap valve body with wet rag T Fit all lines into new valve and braze lines into new valve WARNING EXPLOSION HAZARD The use of nitrogen requires a pressure regulator Follow all safety procedures and wear protective safety clothing etc Failure to follow proper safety procedures could result in serious injury or death 8 Pressurize sealed system with a combination of R 22 and nitrogen and check for leaks using a suitable leak detector Recover refrigerant per EPA guidelines 9 Once the sealed system is leak free install solenoid coil on new valve and charge the sealed system by weighing in the proper amount and type of refrigerant as shown on rating plate Crimp the process tubes and solder the ends shut Do not leave Schrader or piercing valves in the sealed system NOTE When brazing a reversing valve into the system it is of extreme importance that the temperature of the valve does not exceed 250 F at any time Wrap the reversing valve with a large rag saturated with water Re wet the rag and thoroughly cool the valve after each brazing operation of the four joints involved The wet rag around the reversing valve will eliminate conduction of heat to the valve body when brazing the line connection 33 34 COMPRESSOR CHECKS A WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or insta
4. 34 Single Phase Running amp Locked Rotor Amperage 35 External Overload ceteras 34 Checking the External Overload 34 Checking the Internal Overload 34 Compressor Single Phase Resistance Test 35 Compressor Replacement 36 37 Routine Maintenance 38 39 9 18 Electrical Troubleshooting Chart Cooling 40 2 Ton Electrical Troubleshooting Chart Cooling 41 Refrigerant System Diagnosis Cooling 42 Refrigerant System Diagnosis Heating 43 Electrical Troubleshooting Chart Heat Pump 43 Electrical and Thermostat Wiring Diagram 44 49 Thermistors Resistance Valves 50 ACCOSSONGS EE 51 52 IMPORTANT SAFETY INFORMATION The information contained in this manual is intended for use by a qualified service technician who is familiar with the safety procedures required for installation and repair and who is equipped with the proper tools and test instruments required to service this product Installation or repairs made by unqualified persons can result in subjecting the unqualified person making such repairs as well as the persons being served by the equipment to hazards resulting in injury o
5. DESCRIPTION WALL PLENUM Two part sleeve that telescopes in and out from 5 1 2 to 8 in depth The wall plenum sits inside the exterior wall penetration DIMENSIONS 30 3 8 high x 24 1 wide CUTOUT DIMENSIONS 30 78 high x 24 5 s wide Same VPAWP 1 8 but telescopes 8 to 14 as required ARCHITECTURAL LOUVER Extruded aluminum louver that attaches to the outdoor section of the wall plenum DIMENSIONS 31 high x 25 8 1 wide Same as VPAL2 but can be ordered in a special color to match the exterior wall DIGITAL REMOTE WALL THERMOSTAT Single stage thermostat used on VERT I PAK units Hard wired with single speed fan Direct replacement for RT2 DIGITAL REMOTE WALL THERMOSTAT Single stage thermostat Features high low fan speed switch Thermostat is hard wired and can be battery powered or unit powered Features backlit display and multiple configured modes ACCESS PANEL RETURN AIR GRILLE Serves as an access panel to chassis and interior return air grille A field supplied 25 x 20 filter is mounted inside the hinged access door Kit contains hinge bracket for mounting the door with the return air openings high or low on the door for optimal sound attenuation For 9 000 12 000 18 000 Btu models it is recommended to install the door with the hinge on the right side and the return air openings high on the door For 24 000 Btu models it is recommended to install the hinge on the left side with th
6. Electronic Control Error Code Diagnostics and Test Mode Error Code Diagnostics The electronic control continuously monitors the Vert I Pak unit operation and will store error codes if certain conditions are witnessed In some cases the unit may take action and shut the unit off until conditions are corrected To access the error code menu press the HEAT and HIGH FAN buttons simultaneously for three seconds If error codes are present they will be displayed If multiple codes exist you can toggle between error codes using the temp up A button To clear all codes press the temp down button for three seconds while in the error code mode To exit without losing codes press the Low Fan button Button Location for Vert I Pak Models With the remote thermostat escutcheon installed the button locations to access the diagnostics mode can be located as shown below rriedrich High fan Heat 9 Q Low fan Fan only Heat and high fan access error codes Temp up A and temp down toggle between error codes Low fan exit error code mode without losing stored error codes Temp down clears all error codes NOTE Hold buttons down for three seconds ELECTRONIC CONTROL ERROR CODES DIAGNOSTICS AND TEST MODE Continued The chart below lists the possible error codes and their description Error Code Translation Act
7. 3 4 Kw VE VHA18 5 0 Kw 2 5 Kw 3 4 Kw 5 0 Kw VE VHA24 42 63 5 HEATER WATTS 2500 2050 3400 2780 5000 4090 2500 2050 3400 2780 5000 4090 7500 6135 VOLTAGE 230 208 230 208 HEATING BTUh 8500 7000 11600 9500 17000 13900 8500 7000 11600 9500 17000 13900 25598 20939 34130 27914 HEATING CURRENT AMPS 10 6 9 3 14 5 12 5 20 9 18 2 10 9 9 9 14 8 13 4 21 7 19 7 32 6 29 5 43 5 39 3 MINIMUM CIRCUIT AMPACITY BRANCH CIRCUIT FUSE AMPS 15 19 9 27 9 17 2 15 9 22 1 20 3 30 7 28 1 44 3 40 4 57 9 52 7 BASIC HEATER SIZE 2009 Extended Cooling Performance VEA Extended Cooling Performance OUTDOOR DRY BULB TEMP DEGREES F AT 40 R H 85 95 105 INDOOR WET BULB TEMP DEGREES F AT 80 F D B 67 67 67 790 880 950 3 7 44 Operation above these listed temperatures may result in lowered performance or unit fatigue VHA Extended Cooling Performance RATING POINT ARI 310 380 OUTDOOR DRY BULB TEMP DEGREES F AT 40 R H 85 95 105 INDOOR WET BULB DEGREES F AT 80 F D B 67 67 905 977 4 5 Operation above these listed temperatures may result in
8. System airflow should always be verified upon completion of a new installation or before a change out compressor replacement or in the case of heat strip failure to insure that the failure was not caused by improper airflow Checking External Static Pressure The airflow through the unit can be determined by measuring the external static pressure of the system and consulting the blower performance data for the specific VERT I PAK 1 Set up to measure external static pressure at the supply and return air 2 Ensure the coil and filter are clean and that all the registers are open 3 Determine the external static pressure with the blower operating 4 Refer to the Air Flow Data for your VERT I PAK System to find the actual airflow for factory selected fan speeds 5 If the actual airflow is either too high or too low the blower speed will need to be changed to appropriate setting or the ductwork will need to be reassessed and corrections made as required 6 Select a speed which most closely provides the required airflow for the system 7 Recheck the external static pressure with the new speed External static pressure and actual airflow will have changed to a higher or lower value depending upon speed selected Recheck the actual airflow at this new static pressure to confirm speed selection 8 Repeat steps 8 and 9 if necessary until proper airflow has been obtained EXAMPLE Airflow requirements are calc
9. control or measure the quantity of refrigerant entering the evaporator coil In the case of the capillary tube this is accomplished by design through size and length of device and the pressure difference present across the device Since the evaporator coil is under a lower pressure due to the suction created by the compressor than the liquid line the liquid refrigerant leaves the metering device entering the evaporator coil As it enters the evaporator coil the larger area and lower pressure allows the refrigerant to expand and lower its temperature heat intensity This expansion is often referred to as boiling Since the unit s blower is moving indoor air across the finned surface of the evaporator coil the expanding refrigerant absorbs some of that heat This results in a lowering of the indoor air temperature hence the cooling effect The expansion and absorbing of heat cause the liquid refrigerant to evaporate i e change to a gas Once the refrigerant has been evaporated changed to a gas it is heated even further by the air that continues to flow across the evaporator coil The particular system design determines at exactly what point in the evaporator the change of state i e liquid to a gas takes place In all cases however the refrigerant must be totally evaporated changed to a gas before leaving the evaporator coil The low pressure suction created by the compressor causes the refrigerant to leav
10. occurred and corrected itself When the VPAK senses that the indoor room temperature has fallen to 40 F the unit will cycle on high fan and the electric strip heat to raise the room temperature to 46 F then cycle off again This feature works regardless of the mode selected and can be turned off The control will also store the Room Freeze cycle in the service code memory for retrieval at a later date This feature ensures that unoccupied rooms do not reach freezing levels where damage can occur to plumbing and fixtures Multiple compressors starting at once can often cause electrical overloads and premature unit failure The random restart delay eliminates multiple units from starting at once following a power outage or initial power up The compressor delay will range from 180 to 240 seconds The new Friedrich VPAK uses a digital thermostat to accurately monitor the outdoor coil conditions to allow the heat pump to run whenever conditions are correct Running the VPAK in heat pump mode save energy and reduces operating costs The digital thermostat allows maximization of heat pump run time Heat pump models will automatically run the electric heater during compressor lock out to quickly provide heat when initially energized then return to heat pump mode This ensures that the room is heated quickly without the usual delay associated with heat pump units In the event of a compressor failure in heat pump mode the compressor may be locked out to p
11. Motor A 122 1 2 1 2 2 12 12 12 2 Outdoor Motor HP 1 4 NIA NIA N A 1 4 Outdoor Motor 2 2 AIRFLOW DATA Indoor 300 450 610 420 610 Vent CFM 60 60 60 80 60 60 60 80 Max ESP 3 3 3 4 3 3 3 4 PHYSICAL DATA Dimensions WxDxH 23 x 23 x 3234 2316 x 23 x 3234 23 x 23 6 3234 23 x 23 4714 23 23 x 3234 23 x 23 6 3234 23 2316 3234 23 x 23 4714 Net Weight Lbs 114 124 144 167 114 125 144 167 Shipping Weight Lbs 125 135 155 180 125 135 155 180 R 22 Charge 25 Normal Value Wet Coil 1 ESP 29 42 2009 Electric Heat Data VEA VHAO9 12 68 5 23 5 27 09 12 HEATER WATTS 2500 2050 3400 2780 5000 4090 2500 2050 3400 2780 5000 4090 VOLTAGE 230 208 230 208 HEATING BTUh 8500 7000 11600 9500 17000 13900 8500 7000 11600 9500 17000 13900 HEATING CURRENT AMPS 10 6 9 3 14 5 12 5 20 9 18 2 10 6 9 3 14 5 12 5 20 9 18 2 MINIMUM CIRCUIT AMPACITY 15 19 9 27 9 15 19 9 27 9 BRANCH CIRCUIT FUSE AMPS 15 20 30 15 20 30 BASIC HEATER SIZE VEA VHA18 24 2 5 Kw
12. When checking a dual capacitor with a capacitor analyzer or ohmmeter both sides must be tested COMPONENTS TESTING Capacitor Check with Capacitor Analyzer The capacitor analyzer will show whether the capacitor is open or shorted It will tell whether the capacitor is within its micro farads rating and it will show whether the capacitor is operating at the proper power factor percentage The instrument will automatically discharge the capacitor when the test switch is released Capacitor Connections The starting winding of a motor can be damaged by a shorted and grounded running capacitor This damage usually can be avoided by proper connection of the running capacitor terminals From the supply line on a typical 230 volt circuit a 115 volt potential exists from the R terminal to ground through a possible short in the capacitor However from the S or start terminal a much higher potential possibly as high as 400 volts exists because of the counter EMF generated in the start winding Therefore the possibility of capacitor failure is much greater when the identified terminal is connected to the S or start terminal The identified terminal should always be connected to the supply line or R terminal never to the S terminal When connected properly a shorted or grounded running capacitor will result in a direct short to ground from the terminal and will blow the line fuse The moto
13. and 18 BTUs units 23 1 8 wide x 23 1 8 deep 32 1 4 high The 24 BTUs unit is 23 1 8 wide by 23 1 8 deep x 47 1 4 high Units draw in ambient air through upper portion of an outside architectural louver measuring 25 9 16 wide x 31 1 16 high and shall exhaust heated air out through the lower portion of the louver The unit is to be inserted to the architectural louver by means of a two part weather resistant wall plenum The unit is capable of left right or straight in installations into mechanical closet without field modifications REFRIGERATION SYSTEM The refrigeration system consists of a hermetically sealed rotary compressor that is externally mounted on vibration isolators condenser and evaporator coils constructed of copper tubes and aluminum plate fins and capillaries as expansion devices The coils are of draw through design to facilitate cleaning Unit has a fan slinger ring to increase efficiency and condensate disposal and have a primary condensate removal system consisting of FPT drain connections built into the unit for easy removal A secondary condensate removal system is also available for back up and shall overflow through the wall plenum and to the outside of the building INDOOR BLOWER OUTDOOR FAN The current Vert I Pak 9 12 amp 18 use a dual shaft permanent split capacitor dual speed motor to drive indoor blower and outdoor fan The Vert I Pak 24 uses an individual single shaft p
14. for mounting the return air filter in the mechanical closet door or an access panel Optional return air grilles shall be available as factory accessories for installation in the wall or door of the mechanical closet 19 20 External Static Pressure External Static Pressure can best be defined as the pressure difference drop between the Positive Pressure discharge and the Negative Pressure intake sides of the blower External Static Pressure is developed by the blower as a result of resistance to airflow Friction in the air distribution system EXTERNAL to the VERT I PAK cabinet Resistance applied externally to the VERT I PAK i e duct work coils filters etc on either the supply or return side of the system causes an INCREASE in External Static Pressure accompanied by a REDUCTION in airflow External Static Pressure is affected by two 2 factors 1 Resistance to Airflow as already explained 2 Blower Speed Changing to a higher or lower blower speed will raise or lower the External Static Pressure accordingly These affects must be understood and taken into consideration when checking External Static Pressure Airflow to insure that the system is operating within design conditions Operating a system with insufficient or excessive airflow can cause a variety of different operating problems Among these are reduced capacity freezing evaporator coils premature compressor and or heating component failures etc
15. gas vapor into the compressor The compressor then compresses this refrigerant raising its pressure and its heat intensity temperature The refrigerant leaves the compressor through the discharge Line as a hot High pressure gas vapor The refrigerant enters the condenser coil where it gives up some of its heat The condenser fan moving air across the coil s finned surface facilitates the transfer of heat from the refrigerant to the relatively cooler outdoor air When a sufficient quantity of heat has been removed from the refrigerant gas vapor the refrigerant will condense i e change to a liquid Once the refrigerant has been condensed changed to a liquid it is cooled even further by the air that continues to flow across the condenser coil The VPAK design determines at exactly what point in the condenser the change of state i e gas to a liquid takes place In all cases however the refrigerant must be totally condensed changed to a Liquid before leaving the condenser coil The refrigerant leaves the condenser Coil through the liquid line as a warm high pressure liquid It next will pass through the refrigerant drier if so equipped It is the function of the driertotrap any moisture presentin the system contaminants and large particulate matter The liquid refrigerant next enters the metering device The metering device is a capillary tube The purpose of the metering device is to meter i e
16. is actually defective before replacing A WARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refrigerants Failure to follow these procedures could result in serious injury or death 2 Recover all refrigerant from the system though the process tubes PROPER HANDLING OF RECOVERED REFRIGERANT ACCORDING TO EPA REGULATIONS IS REQUIRED Do not use gauge manifold for this purpose if there has been a burnout You will contaminate your manifold and hoses Use a Schrader valve adapter and copper tubing for burnout failures WARNING HIGH TEMPERATURES Extreme care proper judgment and all safety procedures must be followed when testing troubleshooting handling or working around unit while in operation with high temperature 99 80 components Wear protective safety aids SUCh as gloves clothing etc Failure to do so could result in serious burn injury NOTICE FIRE HAZARD The use of a torch requires extreme care and proper judgment Follow all safety recommended precautions and protect surrounding areas with fire proof materials Have a fire extinguisher readily available Failure to follow this notice could result in moderate to serious property damage 3 After all refrigerant has been recovered disconnect suction and discharge li
17. is 200 F 5 KW 230 V Resistance 9 31 Ohms 5 Has 2 Limit Switches Primary Opens at 155 F Closes at 125 F Secondary s Open Temp is 200 F 7 5 KW 230 V composed of 2 3 7 KW Elements Each Has a Resistance of 12 41 Ohms 5 Each Has 2 Limit Switches Primary Opens at 165 F Closes at 135 F With a 1 time Open Temp of 210 F Secondary Limit s Open Temp is 200 F 10 KW 230 V composed of 2 5 KW Elements Each Has a Resistance of 9 31 Ohms 5 Each Has 2 Limit Switches Primary Opens at 165 F Closes at 135 F With a 1 time Open Temp of 210 F Secondary Limit s Open Temp is 200 F NOTE Always replace with an exact replacement TESTING THE HEATING ELEMENTS AND LIMIT SWITCHES A WARNING ELECTRIC SHOCK HAZARD Disconnect power to the unit before servicing Failure to follow this warning could result in serious injury or death Testing of the heating elements can be made with an ohmmeter or continuity tester across the terminals after the power wires have been removed Test the limit switch for continuity across its input and output terminals Test below the limit switch s reset temperature DRAIN PAN VALVE During the cooling mode of operation condensate which collects in the drain pan is picked up by the condenser fan blade and sprayed onto the condenser coil This assists in cooling the refrigerant plus evaporating the water During the heating mode of operation it i
18. procedures must be followed and proper protective clothing must be worn when working with liquid refrigerant Failure to follow these procedures could result in minor to moderate injury 10 Recharge the system with the correct amount of refrigerant The proper refrigerant charge will be found on the unit rating plate The use of an accurate measuring device such as a charging cylinder electronic scales or similar device is necessary SPECIAL PROCEDURE IN THE CASE OF MOTOR COMPRESSOR BURNOUT AWARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation Failure to do so may result in personal injury or death A WARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refrigerants Failure to follow these procedures could result in serious injury or death A WARNING EXPLOSION HAZARD The use of nitrogen requires a pressure regulator Follow all safety procedures and wear protective safety clothing etc Failure to follow proper safety procedures result in serious injury or death 1 Recover all refrigerant and oil from the system 2 Remove compressor capillary tube and filter drier from the system 3 Flush evaporator condenser and all connecting tubing with dry nitrogen or equivalent Use approved flushing agent to
19. proper and adequate protective aids such as gloves clothing safety glasses etc Failure to follow proper safety procedures and or these warnings can result in serious injury or death PROPERTY DAMAGE HAZARDS FIRE DAMAGE HAZARDS e Read the Installation Operation Manual for this air conditioning unit prior to operating e Use air conditioner on a single dedicated circuit within the specified amperage rating e Connect to a properly grounded outlet only e Do not remove ground prong of plug e Do not cut or modify the power supply cord e Do not use extension cords with the unit e Failure to follow these instructions can result in fire and minor to serious property damage WATER DAMAGE HAZARDS e Improper installation maintenance or servicing of the air conditioner unit or not following the above Safety Warnings can result in water damage to personal items or property e Insure that the unit has a sufficient pitch to the outside to allow water to drain from the unit e Do not drill holes in the bottom of the drain pan or the underside of the unit e Failure to follow these instructions can result in result in damage to the unit and or minor to serious property damage INTRODUCTION This service manual is designed to be used in conjunction with the installation manuals provided with each unit This service manual was written to assist the professional HVAC service technician to quickly and accurately diagnose and repair any malfunc
20. remove all contamination from system Inspect suction and discharge line for carbon deposits Remove and clean if necessary Ensure all acid is neutralized 4 Reassemble the system including new drier strainer and capillary tube 5 Proceed with step 8 10 on previous page ROTARY COMPRESSOR SPECIAL TROUBLESHOOTING AND SERVICE Basically troubleshooting and servicing rotary compres sors is the same as on the reciprocating compressor with only one main exception NEVER under any circumstances charge a rotary com pressor through the LOW side Doing so would cause permanent damage to the new compressor 37 38 ROUTINE MAINTENANCE A WARNING NOTICE ELECTRIC SHOCK HAZARD Units are to be inspected and serviced by qualified service Turn off electric power before inspections personnel only Use proper protection on surrounding maintenances or service property Failure to follow this notice could result in moderate or serious property damage Extreme care must be used if it becomes necessary to work on equipment with power applied Failure to do so could result in serious injury or death AIR FILTER Clean the unit air intake filter at least every 300 to 350 hours of operation Clean the filters with a mild detergent in warm water and allow to dry thoroughly before reinstalling COILS AND BASE PAN A WARNING NOTICE EXCESSIVE WEIGHT HAZARD Do not use a caustic coil cleaning agent on coils or base Use two peop
21. system appears dead Line voltage present Check Supply Circuit s Compressor and outdoor Indoor blower runs but one outdoor p the TE jumper at transformer If fan motor run but indoor outdoor fan motor and Primary okay replace board blower does not run compressor do not run operate Problems indicated with Control Transformer replace board 24 Volts at Terminal on board See Refrigerant Circuit diagnosis if unit still is not cooling properly 24 Volts present at Problems indicated with Y terminals on Room Thermostat or t stat and board Control Wiring 208 230 Volts present Defective t stat at 1 relay and OD Replace board e 2 defective control wiring terminal on board or transformer 208 230 Volts present Check contactor at compressor s If defective replace contactor 24V at t stat and control wiring Compressor and outdoor fan motor should now operate Problems indicated Yes in Blower Relay Is Line Voltage present at Motor Leads No of board Supply Circuit problems loose Is Locked Rotor Connections or bad Voltage a minimum of Relays Board 197 Volts See Refrigerant Circuit Diagnosis if unit still is not cooling properly Yes Check Capacitor is Replace Capacitor Capacitor Good No o o Replace Capacitor Are Capacitor and if and or Start Assist so equipped Start Device Assist good Possibl
22. the valve to prevent overheating during the brazing operation CHECK VALVE OPERATION In the cooling mode of operation high pressure liquid enters the check valve forcing the slide to close the opposite port liquid line to the indoor coil Refer to refrigerant flow chart This directs the refrigerant through the filter drier and cooling capillary tube to the indoor coil In the heating mode of operation high pressure refrigerant enters the check valve from the opposite direction closing the port liquid line to the outdoor coil The flow path of the refrigerant is then through the filter drier and heating capillary to the outdoor coil WARNING CUT SEVER HAZARD Be careful with the sharp edges and corners Wear protective clothing and gloves etc Failure to do so could result in serious injury 3 Switch the unit to the heating mode and observe the gauge readings after a few minutes running time If the system pressure is lower than normal the heating capillary is restricted 4 Ifthe operating pressures are lower than normal in both the heating and cooling mode the cooling capillary is restricted Failure of the slide in the check valve to seat properly in either mode of operation will cause flooding of the cooling coil This is due to the refrigerant bypassing the heating or cooling capillary tube and entering the liquid line COOLING MODE In the cooling mode of operation liquid refrigerant from cond
23. wall mounted thermostat The thermostat may be auto or manual changeover as long as the control configuration matches that of the Vert I Pak unit Manual Changeover Thermostat For Heat Pump equipped units a single stage heat cool thermostat with a terminal for a reversing valve operation is required Terminal B should be continuously energized in the heat mode and terminal G should be energized whenever there is a call for heating or cooling Typically a single stage heat cool thermostat designed for use with electric heat systems will meet the above requirements To control the unit with a wall mounted thermostat 1 Pull the disconnect switch 2 Unscrew and remove the control box panel 3 After selecting which side you want to run your thermostat wire through run the wires through the side hole in the box to reach the connection terminal for the wiring 4 Make the wire connections appropriately matching the wires as shown in the wiring diagram 5 Once each wire is matched and connected the unit is now controlled by the thermostat 6 Reattach the control box cover rriedrich SiMPLE COMFORT Cool Off Heat RT4 One speed fan Location The thermostat should not be mounted where it may be affected by drafts discharge air from registers hot or cold or heat radiated from the sun or appliances The thermostat should be located about 5 Ft above the floor in an area of average temperature w
24. worn when working with a torch 1 Failure to follow these procedures could result in moderate or serious injury 3 Install a process tube to sealed system CAUTION FREEZE HAZARD Proper safety procedures must be followed and proper protective clothing must be worn when working with liquid refrigerant Failure to follow these procedures could result in minor to moderate injury 4 Make necessary repairs to system 5 Evacuate system to 200 microns or less 6 Weigh in refrigerant with the property quantity of R 22 refrigerant 7 Start unit and verify performance AWARNING BURN HAZARD Proper safety procedures must be followed mg and proper protective clothing must be worn when working with a torch oM ucl mij Failure to follow these procedures could result in moderate or serious injury 8 Crimp the process tube and solder the end shut 27 A WARNING WARNING ELECTRIC SHOCK HAZARD HIGH PRESSURE HAZARD Turn off electric power before service or Sealed Refrigeration System contains refrigerant installation and oil under high pressure Extreme care must be used if it becomes wi 2 Proper safety procedures must be followed necessary to work on equipment with power Mr and proper protective clothing must be worn applied Y when working with refrigerants Failure to do so could result in serious injury or Failure to follow these procedures could death res
25. 10 6 9 3 14 5 12 5 20 9 18 2 10 9 9 9 14 8 13 4 21 7 19 7 32 6 29 5 43 5 39 3 27 42 12 15 15 230 208 11600 9500 14 5 12 5 63 5 17000 13900 20 9 18 2 24 230 208 2008 Extended Cooling Performance VEA Extended Cooling Performance OUTDOOR DRY BULB TEMP DEGREES F AT 40 R H 75 85 95 105 110 INDOOR WET BULB TEMP DEGREES F AT 80 F D B 72 67 62 72 67 62 67 67 67 62 BTUh 11172 10745 9947 10640 10032 9253 7334 6479 VEAQO WATTS 718 730 737 782 790 800 1038 1042 AMPS 34 3 4 3 5 3 7 3 7 3 7 48 48 SHR 0 51 0 69 0 93 0 52 0 71 0 95 0 83 0 95 BTUh 13877 13346 12355 13216 12461 11493 9110 8048 VEAD WATTS 892 906 916 972 982 994 1289 1294 AMPS 44 4 1 44 44 44 44 5 8 5 8 SHR 049 0 67 0 92 0 72 0 81 0 92 BTUh ss 93 oa 93 to to os os 048 055 088 049 068 oso 049 os 05 04 09 ss or 08 BTUh 28224 27144 25128 26880 25344 23376 18528 16368 VEADA WATTS 2061 2094 2117 2246 2268 2296 2978 2991 AMPS 9 3 9 3 9 4 10 10 10 1 131 13 2 SHR 0 48 0 65 0 88 0 49 0 68 0 89 0 79 0 9 Operation above these listed temperatures may result in lowered RATING POINT AR
26. 4 1 4 1 4 1 4 1 4 1 4 1 4 1 4 Indoor Motor HP Indoor Motor A 12 12 14 2 12 12 14 2 Outdoor Motor HP 1 4 NIA N A N A Outdoor Motor A N A 2 2 AIRFLOW DATA Indoor CFM Vent CFM 60 Max ESP 3 3 3 3 3 3 3 3 PHYSICAL DATA Dimensions W x D x 2316 23 x 3234 23 23 3234 23 x 23 3234 23 x 23 x 4714 23 x 23 3234 23 23 x 3234 23 23 x 3234 2316 x 23 4714 Net Weight Lbs 114 124 144 167 114 125 144 167 Shipping Weight Lbs 125 135 155 180 125 135 155 180 R 22 Charge 25 Normal Value Wet Coil 1 ESP 29 42 2008 Electric Heat Data VEA VHAO09 12 lt 5 a 2 o Heating Current Amps Minimum Circuit Ampacit Branch Circuit Fuse Amps Heater Watts Heating Basic Heater Size VEA VHA18 24 lt 5 a 21 Heating Current Amps Minimum Circuit Ampacit Branch Circuit Fuse Amps Basic Heater Size Heater Watts Heating 2500 2050 23 5 ws v 30 18 3400 2780 5000 4090 2500 2050 3400 2780 5000 4090 7500 6135 10000 8180 230 208 8500 7000 11600 9500 17000 13900 8500 7000 11600 9500 17000 13900 25598 20939 34130 27918
27. AT WIRING DIAGRAM VEA 24 with 2 5 KW 3 4 KW or 5KW ELECTRIC HEAT THERMISTORS pjelj IvIS 004 speeds uDj 20 109 19 pezibueu3 g bunoeH 40 169 M 40 2 A PUN uo4j OvAvz 4 553 1 15 1 8403 QN3931 ON QN3931 TRANSFORMER THERMOSTAT CONNECTIONS MAG M31V3H RELAY 3 RELAY 6 LO3NNOOSIG lt ui Lu z e WIRING DIAGRAM COOL W 2 5KW 3 4KW 46 1 305534905 47 HEAT PUMP WITH ELECTRIC HEAT ELECTRICAL amp THERMOSTAT WIRING DIAGRAM VHA 24 with 2 5 KW 3 4 KW or 5KW ELECTRIC HEAT pepi oad 1 15 1 804 speeds 1 100 19 bunpeu ui pezibueu3 g 40 1109 M 91009 40 A 4 TRANSFORMER THERMOSTAT CONNECTIONS RELAY 4 RELAY 5 RELAY 6 WIRING DIAGRAM HEAT PUMP lt 21 x M x N N COOL WITH ELECTRIC HEAT ELECTRICAL amp THERMOSTAT WIRING DIAGRAM VEA 24 with 7 5 KW and 10 KW ELECTRIC HEAT HOLIMS 3 0553 5 5 pepi oad 4 1 15 1 upj speeds om GLY 4 ubiH
28. I 310 380 performance or unit fatigue VHA Extended Cooling Performance OUTDOOR DRY BULB TEMP DEGREES F AT 40 R H 85 l 95 INDOOR WET BULB TEMP DEGREES F AT 80 F D B 67 67 813 905 3 8 Operation above these listed temperatures may result in lowered RATING POINT performance or unit fatigue ARI 310 380 PERFORMANCE PERFORMANCE C CERTIFIED CERTIFIED 4 ARI Standard 390 ARI Standard 390 tne tane Single Package Single Package Vertical AC Vertical HP www aridirectory org www aridirectory org AWARNING NOTICE ELECTRIC SHOCK HAZARD ELECTRIC SHOCK HAZARD Turn off electric power before service or instal Not following the previous WARNING could result in fire or lation All electrical connnections and wiring electrically unsafe conditions which could cause moderate MUST be installed by a qualified electrician and or serious property damage Read understand and follow conform to the National Electrical Code and all the previous warming local codes which have jurisdiction Failure to do so can result in personal injury and or death ELECTRICAL REQUIREMENTS Wiresize Use ONLY wiring size recommended for single outlet branch circuit Fuse Circuit Break Use ONLY time delayed fused disconnect or HACR type circuit breaker as indicated on the unit s rating plate see
29. NUMBER LK 2000 LF 2006 LA 2001 LG 2007 PRODUCT LINE LB 2002 LH 2008 VPAK LC 2003 LJ 2009 V LD 2004 LE 2005 MONTH MANUFACTURED Jan D G Jul Feb H Aug 4 Sep 2009 Chassis Specifications VEA VHAO9 24 VEAO9K VEA12K VEA18K VEA24K 09 12 VHA18K 24 COOLING DATA Cooling Btu h 9500 9300 11800 11500 17500 17300 9500 9300 11800 11500 17500 17300 Cooling Power W 880 1093 1882 905 1124 1882 EER 10 8 10 8 9 3 10 5 10 5 9 3 Sensible Heat Ratio 0 74 0 72 0 70 0 74 0 72 0 70 HEAT PUMP DATA Heating Btu h 8500 8300 10600 10400 17000 16800 COP 47 F 3 0 3 2 3 0 Heating Power W 830 971 1560 Heating Current A 4 4 4 9 5 5 6 1 7 5 8 2 ELECTRICAL DATA Voltage 1 Phase 60 Hz 230 208 230 208 230 208 230 208 230 208 230 208 230 208 230 208 Volt Range 253 198 253 198 253 198 253 198 253 198 253 198 253 198 253 198 Cooling Current A 414 3 4 9 5 3 8 4 9 0 11 2 12 4 4 2 44 5 0 5 5 8 4 9 2 11 2 12 4 Amps L R 21 21 42 68 21 21 42 68 Amps F L 3 7 45 1 5 10 2 3 7 45 15 10 2 Indoor Motor HP 1 4 1 4 1 4 1 4 1 4 1 4 1 4 1 4 Indoor
30. OT simply use the Kilowatt Rating of the heater i e 2 5 3 4 5 0 as this will result a less than correct airflow calculation Kilowatts may be calculated by multiplying the measured voltage to the unit heater times the measured current draw of all heaters ONLY in operation to obtain watts Kilowatts are than obtained by dividing by 1000 EXAMPLE Measured voltage to unit heaters is 230 volts Measured Current Draw of strip heaters is 11 0 amps 230 x 11 0 2530 2530 1000 2 53 Kilowatts 2 53 x 3413 8635 Supply Air 95 F Return Air 75 F Temperature Rise 20 20 x 1 08 21 6 8635 400 21 6 Indoor Airflow Data The Vert I Pak A series units must be installed with a free return air configuration The table below lists the indoor airflow at corresponding static pressures All units are rarted at low speed The Vert I Pak units are designed for either single speed or two fan speed operation For single speed operation refer to the airflow table below and select the most appropriate CFM based on the ESP level Connect the fan output from the thermostat to the unit on either the GL terminal for low speed or to the GH terminal for high speed operation For thermostats with two speed fan outputs connect the low speed output to the unit GL terminal and the high speed output to the GH terminal Ductwork Preparation Duct ESP To determine your system s indoor external static pressure ESP in inche
31. RES FOR COOL WITH ELECTRIC HEAT UNITS Reversing valve Always de energized when Heat button is pushed Compressor operation Compressor does not operate in this mode Electric heat operation If temp is below set point depending on t stat differential turn on electric heat If Ambient is above set point depending on t stat differential turn off the electric heat Fan delay This is only for fan cycle mode and not for fan continuous mode When unit cycles heating ON start the fan 5 seconds EARLY When unit cycles heating OFF DELAY the fan off for 15 seconds Note the fan delay is disabled during Test Mode 18 VPAK ELECTRONIC CONTROL BOARD AND WALL THERMOSTAT SEQUENCE OF OPERATION Continued HEAT PUMP MODE CONTROL FEATURES FOR HEAT PUMP WITH ELECTRIC HEAT UNITS Reversing valve Always energized when Heat is selected on thermostat Compressor operation depends on t stat settings If ambient indoor temperature is below the set point temperature depending on t stat differential and the compressor is not time delayed turn on compressor If ambient indoor temperature is below set point depending on t stat differential turn off the compressor Compressor Time Delay The time delay feature is de energized for a period of time that varies randomly from 180 to 240 seconds Compressor time delay is initiated every time the compressor is off due to 1 Satisfying the temperature set point 2 Chang
32. and or these warnings can result in serious injury or death REFRIGERATION SYSTEM HAZARDS Use approved standard refrigerant recovering procedures and equipment to relieve pressure before opening system for repair Do not allow liquid refrigerant to contact skin Direct contact with liquid refrigerant can result in minor to moderate injury Be extremely careful when using an oxy acetylene torch Direct contact with the torch s flame or hot surfaces can cause serious burns Make sure to protect personal and surrounding property with fire proof materials Have a fire extinguisher at hand while using a torch Provide adequate ventilation to vent off toxic fumes and work with a qualified assistant whenever possible Always use a pressure regulator when using dry nitrogen to test the sealed refrigeration system for leaks flushing etc Make sure to follow all safety precautions and to use proper protective safety aids such as gloves safety glasses clothing etc Failure to follow proper safety procedures and or these warnings can result in serious injury or death MECHANICAL HAZARDS Extreme care proper judgment and all safety procedures must be followed when testing troubleshooting handling or working around unit with moving and or rotating parts Be careful when handling and working around exposed edges and corners of sleeve chassis and other unit components especially the sharp fins of the indoor and outdoor coils Use
33. ard features on every Friedrich VPAK and their benefit to the owner Quiet Start Stop Fan Delay Remote Thermostat Operation Internal Diagnostic Program Service Error Code Storage Room Freeze Protection Random Compressor Restart Digital Defrost Thermostat Instant Heat Heat Pump Mode Emergency Heat Override Desk Control Ready Indoor Coil Frost Sensor Ultra Quiet Air System High Efficiency Rotary Compressor Auxiliary Fan Ready The fan start and stop delays prevent abrupt changes in room acoustics due to the compressor energizing or stopping immediately Upon call for cooling or heating the unit fan will run for five seconds prior to en ergizing the compressor Also the fan off delay allows for free cooling by utilizing the already cool indoor coil to its maximum capacity by running for 30 seconds after the compressor VPAK units are thermostat controlled The new Friedrich digital VPAK features a self diagnostic program that can alert maintenance to compo nent failures or operating problems The internal diagnostic program saves properties valuable time when diagnosing running problems The self diagnosis program will also store error codes in memory if certain conditions occur and correct themselves such as extreme high or low operating conditions or activation of the room freeze protection feature Storing error codes can help properties determine if the unit faced obscure conditions or if an error
34. arged Refrigerant Systems of the evaporator will not be encountered because the refrigerant will boil later if at all Gauges connected to Compressor amps will be near normal or higher system will usually have higher head pressure depending Noncondensables can also cause these symptoms To amount of over charge Suction pressure should be confirm remove some ofthe charge if conditions improve slightly higher system may be overcharged If conditions don t improve Noncondensables are indicated Whenever an overcharged system is indicated always make sure that the problem is not caused by air flow problems Improper air flow over the evaporator coil may indicate some of the same symptoms as an over charged system Suction Pressure Noticeably High Q Pressure An overcharge can cause the compressor to fail since it would be slugged with liquid refrigerant Refrigerant The charge for any system is critical When the compressor is noisy suspect an overcharge when you are sure that the air quantity over the evaporator coil is correct Icing Overcharged System Restricted Refrigerant System Troubleshooting a restricted refrigerant system can be difficult The following procedures are the more common problems and solutions to these problems There are two types of refrigerant restrictions Partial restrictions and complete restrictions A partial restriction allows some of the
35. assis CONDENSATE DISPOSAL SYSTEM Part 1 The system s first stage increases energy efficiency utilizing a factory installed fan that slings the cold condensate onto the hot outdoor coil Part 2 When high outdoor humidity prevents slinger from disposing of all the condensate the excess condensate overflows into the condensate drain pan and out of the 34 internal drain connections NOTICE If Parts 1 and 2 fail for any reason excess condensate overflows from a spillway directly into the wall plenum to the outside of the building IF THIS OCCURS THIS IS A WARNING THAT THE CHASSIS OR DRAIN NEED SERVICING 39 ELECTRICAL TROUBLESHOOTING CHART COOLING 9K BTU 12K BTU amp 18K BTU NO COOLING OPERATION Before continuing check for Error Insure that Fuses Codes see are good and or that electronics control Circuit Breakers are diagnostics and d volt 208 230 test mode 15 Set thermostat to Nothi Cool and the Temp ot tire operates below the present entire system Room Temp appears dead Compressor and Fan arine Tr nsformer jumper at transformer If Compressor runs but but at the Transformer Blower Fan doesn t G mpressor dossi now Primary okay replace board Yes Yes Problems indicated with Control Transformer replace board 6 24 Volts at See Refrigerant Circuit R Terminal on board diagnosis if unit still is not cooling prope
36. ation and performance section for running amperage The L R A can also be found on the rating plate Select the proper amperage scale and clamp the meter probe around the wire to the terminal of the compressor Turn on the unit and read the running amperage on the me ter If the compressor does not start the reading will indicate the locked rotor amperage L R A Overloads The compressor is equipped with an external or internal overload which senses both motor amperage and wind ing temperature High motor temperature or amperage heats the overload causing it to open breaking the com mon circuit within the compressor Heat generated within the compressor shell usually due to recycling of the motor is slow to dissipate It may take anywhere from a few minutes to several hours for the overload to reset Checking the Overload WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation Extreme care must be used if it becomes necessary to work on equipment with power applied Failure to do so could result in serious injury or death WARNING BURN HAZARD Certain unit components operate at temperatures hot enough to cause burns Proper safety procedures must be followed and proper protective clothing must be worn 8 oS uec Failure to follow this warning could result in moderate to serious injury External Overload VPAK 9 12 18 K Btus With power off remo
37. be displayed If multiple codes exist you can toggle between messages using the temp up A button To clear all codes press the temp down w button for three seconds while in the error code mode To exit without changing codes press the Low Fan button Test Mode For service and diagnostic use only the built in timers and delays on the VPAK may be bypassed by pressing the Cool and Low Fan buttons simultaneously for three seconds while in any mode to enter the test mode CE will be displayed when en tering test mode and JE will be displayed when exiting The test mode will automatically be exited 30 minutes after entering it or by pressing the Cool and Low Fan buttons simultaneously for three seconds Note To access the Test Mode while under remote wall thermostat operation remove thermostat s wires at the terminal block on the electronic control board then connect a jumper wire between GL and GH 15 VPAK ELECTRONIC CONTROL BOARD AND WALL THERMOSTAT SEQUENCE OF OPERATION Wall Thermostat Connections e The control is compatible with a standard single stage heat and cool Wall Thermostat e Itis compatible with Friedrich RT4 and RT5 Wall thermostats Terminals are C Common ground terminal W call for heating Y call for cooling R 24V power from Electronic control to Wall Thermostat GL call for low Fan GH call for high fan B call for heat pump reversing valve The outputs of a s
38. bearing failure and or other mechanical failure The specific type of failure will be influenced by the amount of liquid being returned and the length of time the slugging continues Not enough refrigerant undercharge on the other hand will cause the temperature of the suction gas to increase to the point where it does not provide sufficient cooling for the compressor motor When this occurs the motor winding temperature will increase causing the motor to overheat and possibly cycle open the compressor overload protector Continued overheating of the motor windings and or cycling of the overload will eventually lead to compressor motor or overload failure Method Of Charging Repairs The acceptable method for charging the RAC system is the Weighed in Charge Method The weighed in charge method is applicable to all units It is the preferred method to use as itis the most accurate The weighed in method should always be used whenever a charge is removed from a unit such as for a leak repair compressor replacement or when there is no refrigerant charge left in the unit To charge by this method requires the following steps 1 Install a piercing valve to remove refrigerant from the sealedsystem Piercing valve must be removed from the system before recharging 2 Recover Refrigerant in accordance with EPA regulations AWARNING BURN HAZARD Proper safety procedures must be followed and proper protective clothing must be
39. e motor blem indicated Motor should run B check nator thoroughly Allow ample time Have System for pressures to Pressures Equalized equalize No Yes Possible Compressor problem indicated Compressor should See Compressor No run Checks 41 ELECTRICAL TROUBLESHOOTING CHART HEAT PUMP HEAT PUMP MODE SYSTEM COOLS WHEN HEATING IS DESIRED Is Line Voltage Present at Solenoid Valve Is Selector Switch set for Heat Replace Solenoid Coil Is the Solenoid Coil Good YES Reversing Valve Stuck YES Replace Reversing Valve 42 TROUBLESHOOTING CHART COOLING REFRIGERANT SYSTEM DIAGNOSIS COOLING PROBLEM Low Load Conditions Low Air Flow Across Indoor Coil Refrigerant System Restriction Undercharged PROBLEM High Load Conditions High Air Flow Across Indoor Coil Reversing Valve not Fully Seated Overcharged Defective Compressor PROBLEM Low Load Conditions Refrigerant System Restriction Reversing Valve not Fully Seated Undercharged System Defective Compressor PROBLEM Outdoor Coil TROUBLESHOOTING CHART HEATING REFRIGERANT SYSTEM DIAGNOSIS HEATING PROBLEM LOW SUCTION PRESSURE Low Air Flow Across Outdoor Coil Refrigerant System Restriction Undercharged PROBLEM HIGH SUCTION PRESSURE Outdoor Ambient Too High for Operation in Heating Reversing Valve not Fully Seated Overcharged Defective Compressor PROBLEM LOW HEAD PRESSURE Refr
40. e return air openings low on the door DIMENSIONS 58 high x 29 wide COUTOUT DIMENSIONS 55 3 4 high x 27 wide DRAIN PAN Drain pan may be installed prior to chassis for easy installation removal 51 52 wal ich rriedrich Friedrich Air Conditioning Company P O Box 1540 San Antonio TX 78295 210 357 4400 www friedrich com A SERIES SINGLE PACKAGE VERTICAL AIR CONDITIONERS LIMITED WARRANTY SAVE THIS CERTIFICATE It gives you specific rights You may also have other rights which may vary from state to state and province to province In the event that your unit needs servicing contact your nearest authorized service center If you do not know the nearest service center ask the company that installed your unit or contact us see address and telephone number above To obtain service and or warranty parts replacement you must notify an authorized FRIEDRICH Air Conditioning Co service center distributor dealer or contractor of any defect within the applicable warranty period When requesting service please have the model and serial number from your unit readily available Unless specified otherwise herein the following applies FRIEDRICH VERT I PAK A SERIES VERTICAL AIR CONDITIONERS AND HEAT PUMPS LIMITED WARRANTY FIRST YEAR Twelve 12 months from the date of installation Any part found to be defective in the material or workmanship will be repaired or replaced free of charge by our author
41. e the evaporator through the suction line as a cool low pressure vapor The refrigerant then returns to the compressor where the cycle is repeated Refrigeration Assembly Compressor Evaporator Coil Assembly Condenser Coil Assembly Capillary Tube Compressor Overload SERVICE AWARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation Extreme care must be used if it becomes necessary to work on equipment with power applied Failure to do so could result in serious injury or death AWARNING CUT SEVER HAZARD Be careful with the sharp edges and corners Wear protective clothing and gloves etc Failure to do so could result in serious injury Servicing Chassis Quick Changeouts The chassis is designed for quick disconnect and change out For minor electrical service the control box cover lifts straight up after the screws amp disconnect head are removed For major electrical refrigeration and fan service the chassis may be removed from utility closet To Remove the Chassis from the Closet Switch the wall Thermostat off Pull the Power Disconnect located in the front of the chassis Disconnect the power coming into the unit from the main breaker panel or the closet mounted disconnect Disconnect the electrical connection Disconnect the duct work Slide the chassis out of the wall plenum Lift the chassis out of the utility closet OUT
42. e to the unit should be checked WITH THE UNIT IN OPERATION Voltage readings outside the specified range can be expected to cause operating problems Their cause MUST be investigated and corrected Sample Nameplate seriar no LISTED FRIEDRICH AIR CONDITIONING CO 120524 SAN ANTONIO TEXAS HEATING AND VOLTAGE RANGE 255 197 ELECTRICAL SHOCK AND COOLING EQUIPMENT REFRIG CHARGE 7 OZS R22 DESIGN PRESSURE 575 PSIG HS 150 PSIG LS MOVING PARTS HAZARD APPLICABLE PATENTS US COOLING BTU HR 8 6 065 296 SEER 10 COP 16 HEAT PUMP BTU HR 14 NY MEA NO 295 00 E TOTAL COOLING AMPS 9 USE ONE OF THE TOTAL ELEC HEAT AMPS 15 FOLLOWING ITEMS ELECTRIC HEAT WATTS 18 ROMEACH CATEGORY FOR PERMANENTLY CONNECTED UNITS ONLY TO COMPLETE THE COMP PLA 11 LRA 12 ASSEMBLY MOTOR FLA 13 HP 19 HEATER AMPS 17 WALL PLENUM MIN CKT AMP 0 USE 1 MAX TIME DELA POWER BEFORE VPAWP1 8 OR HACR TYPE CIRCUIT BREAKER SERVICING VPAWPA 14 OUTDOOR GRILLE GENERAL UNIT INFORMATION MAX OUTLET AIR TEMPERATURE 2 L2 MAX EXTERNAL STATIC PRESSURE ELECTRIC INDOOR GRILLE 5 IN WATER VPRG1 O CLEARANCE TO COMBUSTIBLE MATERIAL VPRG2 VPRG5 USE ON SINGLE OUTLET CIRCUIT ONLY REMOTE THERMOSTAT AND LOW VOLTAGE CONTROL CONNECTIONS Friedrich RT5 Two speed fan Remote Thermostat All Friedrich Vert I Pak units are factory configured to be controlled by using a 24V single stage remote
43. ecking External Static Pressure 20 Checking Approximate Airflow 20 pU ETE 21 Components Testing sse 22 23 Refrigeration Sequence of Operation 24 advent 25 Sealed Refrigeration System Repairs 26 Refrigerant Charging 26 Method Of Charging oer ims 27 Undercharged Refrigerant Systems 28 Overcharged Refrigerant Systems 28 Restricted Refrigerant Systems 29 Capillary Tube Systems Check Valve 30 Reversing Valve Description Operation 31 Testing T 32 Checking Reversing Valves 32 Reversing Valve Touch Testing Heating Cooling Cycle 33 Procedure For Changing Reversing Valve 33 Compressor Checks 34 Locked Rotor Voltage 34 Single Phase Connections 34 Determine Locked Rotor Voltage 34 Locked Rotor Amperage
44. enser liquid line enters the cooling check valve forcing the heating check valve shut The liquid refrigerant is directed into the liquid dryer after which the refrigerant is metered through cooling capillary tubes to evaporator Note liquid refrigerant will also be directed through the heating capillary tubes in a continuous loop during the cooling mode HEATING MODE In the heating mode of operation liquid refrigerant from the indoor coil enters the heating check valve forcing the cooling check valve shut The liquid refrigerant is directed into the liquid dryer after which the refrigerant is metered through the heating capillary tubes to outdoor coils Note liquid refrigerant will also be directed through the cooling capillary tubes in a continuous loop during the heating mode REVERSING VALVE DESCRIPTION OPERATION A WARNING ELECTRIC SHOCK HAZARD Disconnect power to the unit before servicing Failure to follow this warning could result in serious injury or death The Reversing Valve controls the direction of refrigerant flow to the indoor and outdoor coils It consists of a pressure operated main valve and a pilot valve actuated by a solenoid plunger The solenoid is energized during the heating cycle only The reversing valves used in the VPAK system is a 2 position 4 way valve The single tube on one side of the main valve body is the high pressure inlet to the valve from the compressor The center tube on the op
45. ermanent split capacitor dual speed motor for the indoor blower and a separate single speed motor drives the outdoor fan Different size HP motors and or different diameter blower wheels are used in different models to obtain the required airflow CONTROLS Are electronic and factory equipped with terminal strip for connection to a standard 24 volt single stage heat cool thermostat A 24 volt transformer is included The unit is to be hard wired It has a quick disconnect to disable power for control box service GENERAL CONSTRUCTION The unit is constructed of 18 gauge G90 zinc coated steel It is insulated for thermal efficiency The wall plenum required factory accessory is constructed of 20 gauge G90 zinc coated steel pre treated with zinc phosphate and sealed with a chromate rinse then powder coated for maximum coverage and protection The architectural louver required factory accessory is fabricated from extruded anodized aluminum with louvers in the horizontal plane The unit includes two vibration isolators mounted under the chassis and a non rigid plenum to chassis connection to isolate vibrations to the building The unit has a plastic fan fan shroud and drain pan for corrosion protection and to help prevent rust on the side of the building below the outdoor louver The unit is shipped with return air filter brackets and a 14 x 20 filter affixed directly on to the unit chassis Other optional factory accessories are available
46. harged refrigerant system causing liquid to be returned to the compressor 3 Restricted refrigerant system 4 Lack of lubrication 5 Liquid refrigerant returning to compressor causing oil to be washed out of bearings 6 Noncondensables such as air and moisture the system Moisture is extremely destructive to a refrigerant system 7 Capacitor test see page 21 CHECKING COMPRESSOR EFFICIENCY The reason for compressor inefficiency is normally due to broken or damaged suction and or discharge valves reducing the ability of the compressor to pump refrigerant gas This condition can be checked as follows 1 Install a piercing valve on the suction and discharge or liquid process tube 2 Attach gauges to the high and low sides of the system 3 Start the system and run a cooling or heating perfor mance test If test shows A Below normal high side pressure B Above normal low side pressure C Low temperature difference across coil The compressor valves are faulty replace the compressor 35 36 COMPRESSOR REPLACEMENT Recommended procedure for compressor replacement AWARNING RISK OF ELECTRIC SHOCK Unplug and or disconnect all electrical power to the unit before performing inspections maintenances or service Failure to do so could result in electric shock serious injury or death 1 Be certain to perform all necessary electrical and refrigeration tests to be sure the compressor
47. igerant System Restriction Reversing Valve not Fully Seated Undercharged Defective Compressor PROBLEM HIGH HEAD PRESSURE Outdoor Ambient Too High For Operation In Heating Low Air Flow Across Indoor Coil Overcharged Non Condensables air in System 43 COOL WITH ELECTRIC HEAT ELECTRICAL amp THERMOSTAT WIRING DIAGRAM VEA 09 12 18 with 2 5 KW 3 4 KW or 5KW ELECTRIC HEAT CAPACITOR RT5 THERMOSTAT FRONT TRANSFORMER THERMOSTAT CONNECTIONS NO RELAY 4 RELAY 5 RELAY 6 HEATER 2 5KW 3 4KW SKW PCB CONNECTION TERMINAL DISCONNEC NOTE THE DIAGRAM ABOVE ILLUSTRATES THE TYPICAL THERMOSTAT WIRING FOR TWO SPEED FAN OPERATION SEE THE UNIT CONTROL PANEL FOR THE ACTUAL UNIT WIRING DIAGRAM AND SCHEMATIC HEAT PUMP WITH ELECTRIC HEAT ELECTRICAL amp THERMOSTAT WIRING DIAGRAM VHA 09 12 18 with 2 5 KW 3 4 KW 5KW ELECTRIC HEAT THERMISTORS OY Gy RT5 THERMOSTAT FRONT TRANSFORMER THERMOSTAT CONNECTIONS COM RELAY 3 NO ID HEATER 2 5KW 3 4KW 5 RELAY 4 HF RELAY 5 LF REV 1 d RELAY 6 REV 2 ECTION TERMINAL DISCONNECT NOTE THE DIAGRAM ABOVE ILLUSTRATES THE TYPICAL THERMOSTAT WIRING FOR TWO SPEED FAN OPERATION SEE THE UNIT CONTROL PANEL FOR THE ACTUAL UNIT WIRING DIAGRAM AND SCHEMATIC COOL WITH ELECTRIC HEAT ELECTRICAL amp THERMOST
48. ing mode to fan only 3 Turning the unit off 4 When control is first energized or when power is restored after failure Note Time delay is disabled during Test Mode Heat When there is a call for heat from the Wall thermostat the PCB will receive signals on terminal W B GL or GH During compressor time delay electric heat will turn on first When com pressor time delay is UP the compressor will turn on Condition If outdoor coil temperature sensor drops to 30 F for less than 2 consecutive minutes then unit will switch to electric heat Thereafter unit will switch back to Heat Pump heat if outdoor coil temperature sensor rises to 45 F or greater Fan delay This is only for fan cycle mode and not for fan continuous mode When unit cycles cool ing ON start the fan 5 seconds EARLY When unit cycles cooling OFF DELAY the fan off for 30 seconds Note the fan delay is disabled during Test Mode Emergency Heat When compressor fails in heating season allows user to disable Heat Pump Heating with elec tric heat only See DIP switch position 7 COMPONENT DESCRIPTION A SERIES SPECIFICATIONS VERT I PAK SINGLE PACKAGED VERTICAL AIR CONDITIONERS 9 000 12 000 18 000 24 K BTUs h All units are factory assembled piped wired and fully charged with R 22 Units are ETL listed and carry an ETL label Units are approved for 0 clearance All units are factory run tested to check operation The 9 12
49. ingle stage Heat and Cool Wall thermostat When a for cool from Wall thermostat the signals will go to terminal Y GL or GH e When a for heat from Wall thermostat the signals will go to terminal W B GL or GH e When a call for Fan Only from Wall thermostat the signals will go to terminal GL or GH Remote T stat Operation Features All buttons on the electronic control board will be disabled except Heat and High Fan buttons during Error code mode operation COMMON CONTROL FEATURES FOR COOL WITH ELECTRIC HEAT AND HEAT PUMP WITH ELECTRIC HEAT UNITS Power On and Off Features on the Electronic Control When power is applied to L1 and L2 the Power LED will be lit on the electronic control Temperature set This feature will depend on Wall Thermostat set This feature will depend on Wall Thermostat Fan speed fan cycle on off or continuous operation This feature will depend on Wall Thermostat For single speed Wall Thermostat user needs to choose between GH terminal High Fan or GL terminal Low Fan For a two speed fan Wall Thermostat connect both GL and GH If the PCB receives signals for both GL and GH at the same time only High Fan turns on VPAK ELECTRONIC CONTROL BOARD AND WALL THERMOSTAT SEQUENCE OF OPERATION Continued COOL MODE CONTROL FEATURES FOR COOL WITH ELECTRIC HEAT UNITS Reversing valve Always de energized when Cool switch is selected on thermostat Compressor opera
50. ion Taken by Unit Possible Cause Error Free No Codes Stored Unit Operating Normally 02 An extreme low voltage condition exists lt 198V for 230V units and 239V for 265V units Return air thermistor sensor open or short circuit 04 Indoor coil thermistor sensor open or short circuit 05 Outdoor coil thermistor sensor open or short circuit If O D coil Temperature gt 175 F for 2 consecutive minutes Heat Pump models only 07 1 2 coil temperature 30 for 2 consecutive minutes No Signal to GL or GH terminal 13 High Pressure switch open VPAK 24K BTUs ONLY Shut down unit Display Error code and flash Once voltage rises to normal level system power is restored Set return air sensor 75 F Alternately flash set point and error code Leave unit running Set ID coil temp 40 F Alternately flash set point and error code Leave unit running Set OD coil temp 20 F Alternately flash set point and error code Automatically change over to Electric heat Mode only Leave unit running Alternately flash set point and error code Shut unit down for 5 minutes then try again 2 times if fails the 3rd time then shut down unit Alternately flash set point and error code Continue fan operation while the compressor is locked out until the indoor coil thermistor reaches 45 F then energize the compressor However compressor must still wait a lockout time of 180 to 240 seconds Turn OFF c
51. ion of the digital Smart Center The inputs are only visible and accessible with the front cover removed from the Unit Factory Dip Switch Configuration Dip Switch Setting Switches 1 4 ON Switch 5 7 OFF Switch 8 ON Room Freeze Protection Switch 6 Units are shipped from the factory with the room freeze protec tion disabled Room Freeze Protection can be switched on at the owner s preference by moving Dip Switch 6 to This feature will monitor the indoor room conditions and in the event that the room falls below 40 F the unit will cycle on high fan with the electric heater This occurs regardless of mode Emergency Heat Override Switch 7 Units are shipped from the factory with the room emergency heat override disabled In the unlikely event of a compressor failure a heat pump unit may be switched to operate in only the electric heat mode until repairs can be made by moving Dip Switch 7 to ON Discharge Air Sensor Override Switch 8 This switch MUST remain in the ON position for Vert I Pak models since they do not use a discharge air sensor If the switch is positioned in the OFF position on these models it will result in the erroneous display Error Code 14 indicating that the Discharge air temperature sensor is open or shorted Note In order for the control to recognize Dip switch setting changes the unit must be disconnected from power supply when making any configuration changes
52. ith good air circulation Close proximity to the return air grille is the best choice Mercury bulb type thermostats MUST be level to control temperature accurately to the desired set point Electronic digital type thermostats SHOULD be level for aesthetics Thermostat Location THERMOSTAT NOTE An improperly operating or poorly located room thermostat can be the source of perceived equipment problems A careful check of the thermostat and wiring must be made then to insure that it is not the source of problems 11 12 REMOTE THERMOSTAT AND LOW VOLTAGE CONTROL CONNECTIONS Continued Thermostat Connections C Common Ground W Call for Heating Y Call for Cooling R 24V Power from Unit GL Call for Fan Low Speed GH Call for Fan High Speed B Reversing Valve Energized in heating mode If only one terminal is present on thermostat connect to GL for low fan or to GH for high fan operation NOTE It is the installer s responsibility to ensure that all control wiring connections are made in accordance with the Freidrich installation instructions Improper connec tion of the thermostat control wiring and or tampering with the unit s internal wiring can void the equipment warranty Questions concerning proper connections to the unit should be directed to the factory 210 357 4400 Thermostat Configuration An improperly configured t stat can be the cause of improper operation Ensure to correctly configure
53. ized service center during the normal working hours and LIMITED WARRANTY SECOND THROUGH FIFTH YEAR Sixty 60 months from the date of installation ON THE SEALED REFRIGERATION SYSTEM Any part of the sealed refrigeration system that is defective in material or workmanship will be repaired or replaced free of charge excluding freight charges by our authorized service center during normal working hours The sealed refrigeration system consists of the compressor metering device evaporator condenser reversing valve check valve and the interconnecting tubing These warranties apply only while the unit remains at the original site and only to units installed inside the continental United States Alaska Hawaii Puerto Rico and Canada The warranty applies only if the unit is installed and operated in accordance with the printed instructions and in compliance with applicable local installation and building codes and good trade practices For international warranty information contact the Friedrich Air Conditioning Company International Division Any defective part to be replaced must be made available to FRIEDRICH in exchange for the replacement part Reasonable proof must be presented to establish the date of install otherwise the beginning date of this certificate will be considered to be our shipment date plus sixty days Replacement parts can be new or remanufactured Replacement parts and labor are only warranted for any unused portion of the
54. l to shift from coooling to heating block the air flow through the outdoor coil and allow the discharge pressure to build in the system Then switch the system from heating to cooling If the valve is stuck in the heating position block the air flow through the indoor coil and allow discharge pressure to build in the system Then switch the system from heating to cooling Should the valve fail to shift in either position after increasing the discharge pressure replace the valve Dented or damaged valve body or capillary tubes can prevent the main slide in the valve body from shifting If you determing this is the problem replace the reversing valve After all of the previous inspections and checks have been made and determined correct then perform the Touch Test on the reversing valve FROM OUTDOOR COIL TO COMPRESSOR SUCTION HOT BOTH THE SAME TEMPERATURE Reversing Valve in Heating Mode TO OUTDOOR COIL TO COMPRESSOR SUCTION BOTH THE SAME TEMPERATURE BOTH THE SAME EMPERATURE FROM COMPRESSOR DISCHARGE Reversing Valve in Cooling Mode Touch Test in Heating Cooling Cycle AWARNING BURN HAZARD Certain unit components operate at temperatures hot enough to cause burns a 1 Proper safety procedures must be followed and proper protective clothing must be worn Failure to follow these procedures could result in minor to moderate injury The only definite indication
55. le to lift or carry the unit and wear pan Use a biodegradable cleaning agent and degreaser proper protective clothing to prevent damage to the coil and or base pan Failure to do so may result in personal injury A WARNING CUT SEVER HAZARD Be careful with the sharp edges and corners Wear protective clothing and gloves etc Failure to do so could result in serious injury The indoor coil evaporator coil the outdoor coil condenser coil and base pan should be inspected periodically yearly or bi yearly and cleaned of all debris lint dirt leaves paper etc Clean the coils and base pan with a soft brush and compressed air or vacuum If using a pressure washer be careful not to bend the aluminium fin pack Use a sweeping up and down motion in the direction of the vertical aluminum fin pack when pressure cleaning coils Cover all electrical components to protect them from water or spray Allow the unit to dry thoroughly before reinstalling it in the sleeve BLOWER WHEEL HOUSING CONDENSER FAN SHROUD Inspect the indoor blower housing evaporator blade condenser fan blade and condenser shroud periodically yearly or bi yearly and clean of all debris lint dirt mold fungus etc Clean the blower housing area and blower wheel with an antibacterial antifungal cleaner Use a biodegradable cleaning agent and degreaser on condenser fan and condenser shroud Use warm or cold water when rinsing these items Allow all items
56. llation Extreme care must be used if it becomes necessary to work on equipment with power applied Failure to do so could result in serious injury or death Locked Rotor Voltage L R V Test Locked rotor voltage L R V is the actual voltage available at the compressor under a stalled condition Single Phase Connections Disconnect power from unit Using a voltmeter attach one lead of the meter to the run terminal on the compressor and the other lead to the common terminal of the com pressor Restore power to unit Determine L R V Start the compressor with the volt meter attached then stop the unit Attempt to restart the compressor within a couple of seconds and immediately read the voltage on the meter The compressor under these conditions will not start and will usually kick out on overload within a few seconds since the pressures in the system will not have had time to equalize Voltage should be at or above minimum voltage of 197 VAC as specified on the rating plate If less than minimum check for cause of inadequate power supply i e incorrect wire size loose electrical connections etc Amperage L R A Test The running amperage of the compressor is the most impor tant of these readings A running amperage higher than that indicated in the performance data indicates that a problem exists mechanically or electrically Single Phase Running and L R A Test NOTE Consult the specific
57. lowered performance or unit fatigue PERFORMANCE PERFORMANCE C CERTIFIED m CERTIFIED 8 ear ARI Standard 390 ARI Standard 390 Single Package Single Package Vertical AC Vertical HP Www aridirectory org www aridirectory org RATING POINT ARI 310 380 2008 Chassis Specifications 9 24 VEAO9K VEA12K VEA18K VEA24K 09 12 18 24 COOLING DATA Cooling Btu h 9500 9300 11800 11500 18000 17800 9500 9300 11800 11500 18000 17800 Cooling Power W 880 1093 2070 905 1124 2070 EER 10 8 10 8 8 7 10 5 10 5 8 7 Sensible Heat Ratio 0 74 0 72 0 70 0 74 0 72 0 70 HEAT PUMP DATA Heating Btu h 8500 8300 10600 10400 15700 15500 47 F 3 0 3 2 3 0 Heating Power W 830 971 1705 Heating Current A 4 4 4 9 5 5 6 1 9 2 10 2 ELECTRICAL DATA Voltage 1 Phase 60 Hz 230 208 230 208 230 208 230 208 230 208 230 208 230 208 230 208 Volt Range 253 198 253 198 253 198 253 198 253 198 253 198 253 198 253 198 Cooling Current A 4 14 3 4 9 5 3 9 2 10 2 11 2 12 4 4 2 4 4 5 0 5 5 9 2 10 2 11 2 12 4 Amps L R 21 21 47 68 21 21 47 68 Amps F L 3 7 45 79 10 2 3 7 45 7 9 10 2 1
58. nes from the compressor and remove compressor Be certain to have both suction and discharge process tubes open to atmosphere 4 Carefully pour a small amount of oil from the suction stub of the defective compressor into a clean container 5 Using an acid test kit one shot or conventional kit test the oil for acid content according to the instructions with the kit 6 If any evidence of a burnout is found no matter how slight the system will need to be cleaned up following proper procedures 7 Install the replacement compressor A WARNING EXPLOSION HAZARD The use of nitrogen requires a pressure regulator Follow all safety procedures and wear protective safety clothing etc Failure to follow proper safety procedures result in serious injury or death 8 Pressurize with a combination of R 22 and nitrogen and leak test all connections with an electronic or Halide leak detector Recover refrigerant and repair any leaks found Repeat Step 8 to insure no more leaks are present 9 Evacuate the system with a good vacuum pump capable of a final vacuum of 300 microns or less The system should be evacuated through both liquid line and suction line gauge ports While the unit is being evacuated seal all openings on the defective compressor Compressor manufacturers will void warranties on units received not properly sealed Do not distort the manufacturers tube connections A CAUTION FREEZE HAZARD Proper safety
59. o close the fresh air door The system is capable of up to 60 CFM of fresh air 3 H20 internal static pressure 22 BLOWER FAN MOTOR A single phase permanent split capacitor motor is used to drive the evaporator blower and condenser fan A self resetting overload is located inside the motor to protect against high temperature and high amperage conditions WARNING ELECTRIC SHOCK HAZARD Disconnect power to the unit before servicing Failure to follow this warning could result in serious injury or death BLOWER FAN MOTOR TEST 1 Do a visual inspection of motor s wiring housing etc Determine that the capacitor is serviceable 2 Make sure the motor has cooled down 3 Disconnect the fan motor wires from the control board 4 Test for continuity between the windings also test to ground 5 If any winding is open or grounded replace the motor 6 A live test can also be performed by using a live test probe see appropriate wiring schematic Fan Motor CAPACITORS ELECTRIC SHOCK HAZARD Turn off electric power before servicing Discharge capacitor with a 20 000 Ohm 2 Watt resistor before handling Failure to do so may result in personal injury or death Many motor capacitors are internally fused Shorting the terminals will blow the fuse ruining the capacitor A 20 000 ohm 2 watt resistor can be used to discharge capacitors safely Remove wires from capacitor and place resistor across terminals
60. ompressor Flash error code Inadequate power supply Defective breaker Blown fuse Defective sensor Defective sensor Defective sensor Dirty coil Fan motor failure Restricted air flow Non condensables in refrigeration system Dirty filters Dirty coil Fan motor failure Restricted airflow Improper refrigerant charge e Restriction in refrigerant circuit Unit cycles Heat or Cool demand Store error code in memory Unit oversized 9 times per hour Keep unit running Low load conditions Unit cycles Heat or Cool demand Store Error Code in memory Unit undersized 3 times per hour Keep unit running High load conditions Room Freeze Protection triggered Alternately flash set point and error code Room temperature fell below 40 F Keep unit running Shut down unit Display error code and Defective remote thermostat flash Defective thermostat wiring Dirty coil Fan motor failure Restricted air flow Non condensables in refrigeration system Diagnostics The Friedrich Smart Center continuously monitors the VPAK unit operation and will store service codes if certain conditions are witnessed In some cases the unit may take action and shut the unit off until conditions are corrected To access the error code menu press the Heat and High Fan buttons simultaneously for three sec onds If error codes are present they will
61. posite side is connected to the low pressure suction side of the system The other two are connected to the indoor and outdoor coils Small capillary tubes connect each end of the main valve cylinder to the PILOT SOLENOID VALVE FROM COMPRESSOR DISCHARGE A and B ports of the pilot valve Athird capillary is common return line from these ports to the suction tube on the main valve body Four way reversing valves also have a capillary tube from the compressor discharge tube to the pilot valve The piston assembly in the main valve can only be shifted by the pressure differential between the high and low sides of the system The pilot section of the valve opens and closes ports for the small capillary tubes to the main valve to cause it to shift NOTE System operating pressures must be near normal before valve can shift FROM VALVE DISCHARGE 4 WAY REVERSING VALVE 31 32 TESTING THE COIL A WARNING ELECTRIC SHOCK HAZARD Unplug and or disconnect all electrical power inspections to the unit before performing maintenances or service Failure to do so could result in electric shock serious injury or death The solenoid coil is an electromagnetic type coil mounted on the reversing valve and is energized during the operation of the compressor in the heating cycle Turn off high voltage electrical power to unit Unplug line voltage lead from reversing valve coil Check for electrical continuity th
62. r electrical shock which can be serious or even fatal Safety warnings have been placed throughout this manual to alert you to potential hazards that may be encountered If you install or perform service on equipment it is your responsibility to read and obey these warnings to guard against any bodily injury or property damage which may result to you or others Your safety and the safety of others are very important We have provided many important safety messages in this manual and on your appliance Always read and obey all safety messages This is a safety Alert symbol This symbol alerts you to potential hazards that can kill or hurt you and others All safety messages will follow the safety alert symbol with the word WARNING or CAUTION These words mean A WARN NG You can be killed or seriously injured if you do not follow instructions A CAUTION You can receive minor or moderate injury if you do not follow instructions All safety messages will tell you what the potential hazard is tell you how to reduce the chance of injury and tell you what will happen if the instructions are not followed A message to alert you of potential property damage will have the NO TICE word NOTICE Potential property damage can occur if instructions are not followed PERSONAL INJURY OR DEATH HAZARDS ELECTRICAL HAZARDS e Unplug and or disconnect all electrical power to the unit before performing inspections maintenance or se
63. r protector will protect the main winding from excessive temperature Dual Rated Run Capacitor Hook up FAN MOTOR COM RED DOT RUN CAPACITOR COMPONENTS TESTING Continued HEATER ELEMENTS AND LIMIT SWITCHES SPECIFICATIONS All heat pumps and electric heat models are equipped with a heating element and a limit switch bimetal ther mostat The limit is in series with the element and will interrupt the power at a designed temperature Should the blower motor fail filter become clogged or air flow be restricted etc the high limit switch will open and interrupt the power to the heater before reaching an un safe temperature condition VPAK 9K 12K and 18K BTUs Models 2 5 KW 230 V Resistance 18 61 Ohms 5 Has 1 Limit Switch Opens at 120 F Closes at 90 F It has a One Time Open Temp of 145 F 3 4 KW 230 V Resistance 13 68 Ohms 5 Has 1 Limit Switch Opens at 120 F Closes at 90 F It has a One Time Open Temp of 145 F 5 KW 230 V Resistance 9 31 Ohms 5 Has 1 Limit Switch Opens at 130 F Closes at 100 F It has a One Time Open Temp of 155 F VPAK 24K BTUs Models 2 5 KW 230 V Resistance 18 61 Ohms 5 Has 2 Limit Switches Primary Opens at 155 F Closes at 125 F Secondary s Open Temp is 200 F 3 4 KW 230 V Resistance 13 68 Ohms 5 Has 2 Limit Switches Primary Opens at 155 F Closes at 125 F Secondary s Open Temp
64. re The following conditions are based primarily on a system in the cooling mode Reversing Valve Head Pressure Outdoor Coll Compressor Gauges will not equalize with unit shut off Completely Restricted System Accumulator Suction Pressure Indoor Coil Lower Outdoor Coil Gauges may equalize very slowly Partially Restricted System 29 30 HERMETIC COMPONENTS CHECK A WARNING BURN HAZARD Proper safety procedures must be followed and proper protective clothing must be worn when working with a torch c amd Failure to follow these procedures could result in moderate or serious injury METERING DEVICE Capillary Tube Systems All units are equipped with capillary tube metering devices Checking for restricted capillary tubes 1 Connect pressure gauges to unit 2 Start the unit in the cooling mode If after a few minutes of operation the pressures are normal the check valve and the cooling capillary are not restricted CHECK VALVE A unique two way check valve is used on the reverse cycle heat pumps It is pressure operated and used to direct the flow of refrigerant through a single filter drier and to the proper capillary tube during either the heating or cooling cycle One way Check Valve Heat Pump Models X I 9 XE NOTE The slide check inside the valve is made of teflon Should it become necessary to replace the check valve place a wet cloth around
65. refrigerant to circulate through the system With a complete restriction there is no circulation of refrigerant in the system Restricted refrigerant systems display the same symptoms as a low charge condition When the unit is shut off the gauges may equalize very slowly Gauges connected to a completely restricted system will run a deep vacuum When the unit is shut off the gauges will not equalize at all A quick check for either condition begins at the evaporator With a partial restriction there may be gurgling sounds Accumulator indoor Deep Vacuum at the metering device entrance to the evaporator The evaporator in a partial restriction could be partially frosted or have an ice ball close to the entrance of the metering device Frost may continue on the suction line back to the compressor Often a partial restriction of any type can be found by feel as there is a temperature difference from one side of the restriction to the other With a complete restriction there will be no sound at the metering device entrance An amperage check of the compressor with a partial restriction may show normal current when compared to the unit specifi cation With a complete restriction the current drawn may be considerably less than normal as the compressor is running in a deep vacuum no load Much of the area of the condenser will be relatively cool since most or all of the liquid refrigerant will be stored the
66. rly 24 Volts present at Problems indicated with Y terminals on Room Thermostat or t stat and board Control Wiring 208 230 Volts present Defective t stat at 1 relay on board Replace board defective control wiring or transformer 24V at t stat and control wiring Compressor and fan motor should now No operate Is Line Voltage present Problems indicated Yes at Motor Leads No in Blower Relay of board Supply Circuit problems loose l Locked Rotor See Refrigerant Connections or bad Voltage a minimum of Circuit Dia gnosis if Relays Board No unit still is not cooling Yes mm properly eck Capacitor is i Capacitor Good Replace Capacitor Replace Capacitor Are Capacitor and if and or Start Assist so equipped Start Mus Device Assist good Possible motor Yes problem indicated Motor should run No Check motor thoroughly Allow ample time Have System for pressures to Pressures Equalized equalize No Yes Possible Compressor problem indicated Compressor should See Compressor No run Checks 40 ELECTRICAL TROUBLESHOOTING CHART COOLING 24K BTU NO COOLING OPERATION Before continuing check for Error insure Puses Codes see are good and or that Circuit Breakers electronics control n diagnostics and d volt 208 230 test mode 15 Set thermostat to Cool move the Temp lever below the present Room Temp Nothing operates entire
67. rough the coil If you do not have continuity replace the coil 4 Check from each lead of coil to the copper liquid line as it leaves the unit or the ground lug There should be no continuity between either of the coil leads and ground if there is coil is grounded and must be replaced 5 If coil tests okay reconnect the electrical leads 6 Make sure coil has been assembled correctly NOTE Do not start unit with solenoid coil removed from valve or do not remove coil after unit is in operation This will cause the coil to burn out CHECKING THE REVERSING VALVE NOTE You must have normal operating pressures before the reversing valve can shift A WARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refrigerants Failure to follow these procedures could result in serious injury or death Check the operation of the valve by starting the system and switching the operation from Cooling to Heating and then back to Cooling Do not hammer on valve Occasionally the reversing valve may stick in the heating or cooling position or in the mid position When sluggish or stuck in the mid position part of the discharge gas from the compressor is directed back to the suction side resulting in excessively high suction pressure Should the valve fai
68. rovide heat through the resistance heater This feature ensures that even in the unlikely event of a compressor failure the room temperature can be maintained until the compressor can be serviced All electronic VPAK units have low voltage terminals ready to connect a desk control energy management System Controlling the unit from a remote location like the front desk can reduce energy usage and requires no additional accessories at the VPAK The frost sensor protects the compressor from damage in the event that airfl ow is reduced or low outdoor temperatures cause the indoor coil to freeze When the indoor coil reaches 30 F the compressor is diabled and the fan continues to operate based on demand Once the coil temperature returns to 45 F the compressor returns to operation The VPAK series units feature a indoor fan system design that reduces sound levels without lowering airflow and preventing proper air circulation The VPAK benefits quality components and extensive development to ensure a quiet efficient and dependable unit High efficiency rotary compressors are used on all Friedrich VPAKs to maximize durability and efficiency The VPAK features a 24V AC terminal for connection to an auxiliary fan that may be used to transfer air to adjoining rooms Auxiliary fans can provide conditioning to multiple rooms 13 14 Electronic Control Configuration The adjustable control dip switches are located at the lower left hand port
69. rredrich Service Manual VERT I PAK PAK A SERIES Electronic Control Single Package Vertical Air Conditioning System For Years 2009 and 2008 Models 9 000 BTU s 12 000 BTU s 18 000 BTU s 24 000 BTU s VPK ServMan 04 09 TECHNICAL SUPPORT CONTACT INFORMATION rriedrich FRIEDRICH AIR CONDITIONING CO Post Office Box 1540 San Antonio Texas 78295 1540 4200 N Pan Am Expressway San Antonio Texas 78218 5212 210 357 4400 FAX 210 357 4490 www friedrich com Printed in the U S A Table of Contents Important Safety Information 2 25555525 42 55524284 51248 213 4 Vert I Pak Model Number Identification Guide 5 Serial Number Identification Guide 5 2009 Models Chassis Specifications Performance 6 7 2008 Models Chassis Specifications Performance 8 9 Electrical Requirements sss 10 Remote Thermostat and Low Voltage Control 11 12 V PAK Electronic Control Board Features 13 Electronic Control Configuration 14 Electronic Control Error Code Diagnostics Test Mode 14 15 Electronic Control Board Wall Thermostat Sequence of Operation 16 18 Component Description 19 Ch
70. rvice e Make sure to follow proper lockout tag out procedures e Always work in the company of a qualified assistant if possible e Capacitors even when disconnected from the electrical power source retain an electrical charge potential capable of causing electric shock or electrocution e Handle discharge and test capacitors according to safe established standards and approved procedures e Extreme care proper judgment and safety procedures must be exercised if it becomes necessary to test or troubleshoot equipment with the power on to the unit Do not spray or pour water on the return air grille discharge air grille evaporator coil control panel and sleeve on the room side of the air conditioning unit while cleaning Electrical component malfunction caused by water could result in electric shock or other electrically unsafe conditions when the power is restored and the unit is turned on even after the exterior is dry Never operate the A C unit with wet hands Use air conditioner on a single dedicated circuit within the specified amperage rating Use on a properly grounded outlet only Do not remove ground prong of plug Do not cut or modify the power supply cord Do not use extension cords with the unit Follow all safety precautions and use proper and adequate protective safety aids such as gloves goggles clothing adequately insulated tools and testing equipment etc Failure to follow proper safety procedures
71. s necessary that water be removed to prevent it from freezing during cold outside temperatures This could cause the condenser fan blade to freeze in the accumulated water and prevent it from turning To provide a means of draining this water a bellows type drain valve is installed over a drain opening in the base pan This valve is temperature sensitive and will open when the outside temperature reaches 40 F The valve will close gradually as the temperature rises above 40 F to fully close at 60 F Bellows Assembly Drain Pan Valve 23 24 REFRIGERATION SEQUENCE OF OPERATION A good understanding of the basic operation of the refrigeration system is essential for the service technician Without this understanding accurate troubleshooting of refrigeration system problems will be more difficult and time consuming if not in some cases entirely impossible The refrigeration system uses four basic principles laws in its operation they are as follows 1 Heat always flows from a warmer body to a cooler body 2 Heat must be added to or removed from a substance before a change in state can occur 3 Flow is always from a higher pressure area to a lower pressure area 4 The temperature at which a liquid or gas changes state is dependent upon the pressure The refrigeration cycle begins at the compressor Starting the compressor creates a low pressure in the suction line which draws refrigerant
72. s of water use a duct calculator as provided by your duct supplier Include all flex duct transitions and discharge grille s If flex duct is used be sure all the slack is pulled out of the flex duct Flex duct ESP can increase considerably when not fully extended DO NOT EXCEED a total of 30 ESP as this is the MAXIMUM design limit for the VERT I PAK A Series unit Ductwork Preparation Pull the flex duct tight Extra flex duct slack can greatly increase static pressure IMPORTANT FLEX DUCT CAN COLLAPSE AND CAUSE AIRFLOW RESTRICTIONS DO NOT USE FLEX DUCT FOR 90 DEGREE BENDS OR UNSUPPORTED RUNS OF 5 FT OR MORE oo 340 385 420 470 430 Highlighted values indicate rated performance point Rated performance for Determining the Indoor Chart A CFM Model VEAO9 VHAO9 VEA12 VHA12 VEA18 VHA18 VEA12 Rated Performance for VHA12 Model 00 690 740 Highlighted values indicate rated performance point Correct CFM if needed Chart B Correction Multipliers Correction Multipliers for 230V Cooling 0 95 Explanation of charts Chart A is the nominal dry coil CFMs Chart B is the correction factors beyond nominal conditions Fresh Air Door The Fresh Air Door is an intake system The fresh air door opened via a slide on the front of the chassis located just above the indoor coil Move the slide left to open and right t
73. s that the slide is in the mid position is if all three tubes on the suction side of the valve are hot after a few minutes of running time NOTE A condition other than those illustrated above and on Page 31 indicate that the reversing valve is not shifting properly Both tubes shown as hot or cool must be the same corresponding temperature Procedure For Changing Reversing Valve AWARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refrigerants Failure to follow these procedures could result in serious injury or death NOTICE FIRE HAZARD The use of a torch requires extreme care and proper judgment Follow all safety recommended precautions and protect surrounding areas with fire proof materials Have a fire extinguisher readily available Failure to follow this notice could result in moderate to serious property damage 1 Install Process Tubes Recover refrigerant from sealed system PROPER HANDLING OF RECOVERED REFRIGERANT ACCORDING TO EPA REGULATIONS IS REQUIRED 2 Remove solenoid coil from reversing valve If coil is to be reused protect from heat while changing valve 3 Unbraze all lines from reversing valve 4 Clean all excess braze from all tubing so that they will slip into fittings on new valve 5 Remove solenoid coil from new valve
74. sample on this page Proper current protection to the unit is the responsibility of the owner Unit MUST be grounded from branch circuit to unit or through separate ground wire provided on permanently connected units Be sure that branch circuit or general purpose outlet is grounded Wiresizng 000 Use recommended wire size given in tables and install a single branch circuit All wiring must comply with local and national codes NOTE Use copper conductors only Note All field wiring must comply with NEC and local codes It is the responsibility of the installer to insure that the electrical codes are met All 208 230v chassis must be hard wired with properly sized breaker See nameplate for specific chassis electrical requirements See figure 9 Page 12 for unit wiring and wall thermostat wiring See Electrical Rating Table below for wire siz Use HACR type breakers to avoid nuisance trips All feld wiring must be done in accordance with NEC and local codes Electrical Rating Tables NOTE Use copper conductors ONLY Wire sizes are per NEC Check local codes for overseas applications Recommended branch circuit wire sizes Nameplate maximum circuit breaker size AWG Wire size AWG American Wire Gauge Single circuit from main box Based on copper wire single insulated conductor at 60 C Supply voltage Supply voltage to the unit should be a nominal 208 230 volts It must be between 197 volts and 253 volts Supply voltag
75. start to run terminals S to R Resistance S to R should equal the total of to S and C to R In a single phase PSC compressor motor the highest value will be from the start to the run connections S to The next highest resistance is from the start to the common connections 5 to The lowest resistance is from the run to common C to R Before replacing a compressor check to be sure it is defective GROUND TEST Use an ohmmeter set on its highest scale Touch one lead to the compressor body clean point of contact as a good connection is a must and the other probe in turn to each compressor terminal If a reading is obtained the compressor is grounded and must be replaced Check the complete electrical system to the compressor and compressor internal electrical system check to be certain that compressor is not out on internal overload Complete evaluation of the system must be made whenever you suspect the compressor is defective If the compressor has been operating for sometime a careful examination must be made to determine why the compressor failed NOTE OHM Figures are for examples only not actual values for the compressor 3 16 OHMS 49 OHMS 3 65 OHMS RESISTANCE Stoc RESISTANCE EQUALS RESISTANCE StoR Many compressor failures are caused by the following conditions 1 Improper air flow over the evaporator 2 Overc
76. t for one year after the original purchase date Some states and provinces do not allow limitations on how long an implied warranty or condition lasts so the above limitations or exclusions may not apply to you The provisions of this warranty are in addition to and not a modification of or subtraction from the statutory warranties and other rights and remedies provided by law Performance of Friedrich s Warranty obligation is limited to one of the following methods 1 Repair of the unit 2 A refund to the customer for the prorated value of the unit based upon the remaining warranty period of the unit 3 Providing a replacement unit of equal value The method of fulfillment of the warranty obligation is at the sole discretion of Friedrich Air Conditioning In case of any questions regarding the provisions of this warranty the English version will govern 10 08 TECHNICAL SUPPORT CONTACT INFORMATION rriedrich FRIEDRICH AIR CONDITIONING CO Post Office Box 1540 San Antonio Texas 78295 1540 4200 Pan Expressway San Antonio Texas 78218 5212 210 357 4400 FAX 210 357 4490 www friedrich com Printed in the U S A rriedrich FRIEDRICH AIR CONDITIONING CO Post Office Box 1540 San Antonio Texas 78295 1540 4200 N Pan Am Expressway San Antonio Texas 78218 5212 210 357 4400 FAX 210 357 4490 www friedrich com VPK ServMan 04 09 Printed in the U S A
77. th an improper refrigerant charge will result in reduced performance capacity and or efficiency Accordingly the use of proper charging methods during ser vicing will insure that the unit is functioning as designed and that its compressor will not be damaged 9 High Pressure Gauge 0 400 Ibs 10 Low Pressure Gauge 30 150 Ibs 11 Vacuum Gauge 0 1000 microns EQUIPMENT MUST BE CAPABLE OF 1 Recovery CFC s as low as 5 2 Evacuation from both the high side and low side of the system simultaneously 3 Introducing refrigerant charge into high side of the system 4 Accurately weighing the refrigerant charge actually introduced into the system 5 Facilities for flowing nitrogen through refrigeration tubing during all brazing processes Too much refrigerant overcharge in the system is just as bad if not worse than not enough refrigerant undercharge They both can be the source of certain compressor failures if they remain uncorrected for any period of time Quite often other problems such as low air flow across evaporator etc are misdiagnosed as refrigerant charge problems The refrigerant circuit diagnosis chart will assist you in properly diagnosing these systems An overcharged unit will at times return liquid refrigerant slugging back to the suction side of the compressor eventually causing a mechanical failure within the compressor This mechanical failure can manifest itself as valve failure
78. the t stat see owner s manual Desk Control Terminals The Friedrich VERT I PAK has built in provisions for connection to an external switch to control power to the unit The switch can be a central desk control system or even a normally open door switch For desk control operation connect one side of the switch to the D1 terminal and the other to the D2 terminal See figure 9 Whenever the switch closes the unit operation will stop Maximum Wire Length for Desk Control Switch WireSize Maximum Length 400 ft 600 ft 900 ft Note The desk control system and 1500 ft switches must be 2000 ft field supplied Auxiliary Fan Control The Smart Center also has the ability to control a 24VAC relay to activate an auxiliary or transfer fan The outputs are listed as F1 and F2 on the control board To connect the relay simply wire one side of the relay to F1 and the other side to F2 Anytime that the fan runs the terminals will send a 24VAC signal to the relay The relay must be 24 VAC 50mA or less Note The relay and auxiliary fans must be field supplied ELECTRONIC CONTROL BOARD FEATURES The new Friedrich Vert I Pak has state of the art features to improve guest comfort and conserve energy Through the use of specifically designed control software Friedrich has accomplished what other Manufacturer s have only attempted a quiet dependable affordable and easy to use Vert I Pak Below is a list of stand
79. tion If ambient indoor temperature is above set point temperature depending on t stat differential and the compressor is not time delayed turn on compressor If ambient indoor temperature is below set point depending on t stat differential turn off the compressor Compressor time delay The time delay feature is de energized for a period of time that varies randomly from 180 to 240 seconds Compressor time delay is initiated every time the compressor is off due to 1 Satisfying the temperature set point 2 Changing mode to fan only 3 Turning the unit off 4 Control is first energized or when power is restored after failure Note Time delay is disabled during Test Mode Indoor coil frost protection Error Code 07 While in cool mode If the indoor coil frost protection sensor reads 30 F for 2 minutes continu ously turn off the compressor but continue fan operation While the compressor is out and the fan is running when the indoor coil frost protection sensor reaches 45 F turn on the compres sor However the compressor must still wait a standard time of 180 to 240 seconds While 07 flash heat operation is disabled Fan delay This is only for fan cycle mode and not for fan continuous mode When unit cycles cool ing ON start the fan 5 seconds EARLY When unit cycles cooling OFF DELAY the fan off for 30 seconds Note the fan delay is disabled during Test Mode ELECTRIC HEAT MODE CONTROL FEATU
80. tions of this product This manual therefore will deal with all subjects in a general nature i e All text will pertain to all models IMPORTANT It will be necessary for you to accurately identify the unit you are servicing so you can be certain of a proper diagnosis and repair See Unit Identification Pa 271 Rigid Ductwork Exterior Wall f Flexible Ductwork VPAWP1 8 1 14 Wall Plenum Plenum Divider Power Disconnect Optional field VPRG4 Access Panel amp installed drain pan Return Air Filter Grille refer to local codes Optional Platform 3 Clearance on all three 3 ul VPDP1 drain pan beneath sides minimum for i i i Chassis is unit is required on all service and installation shipped with VEA VHA24 units Drain pan vibration must be installed prior to isolators chassis installation installed Model Identification Guide MODEL NUMBER SERIES ENGINEERING CODE V Vertical Series E Cooling with or without electric heat OPTIONS H Heat Pump DESIGN SERIES A 32 and 47 Cabinet RT Standard Remote Operation NOMINAL CAPACITY ELECTRIC HEATER SIZE A Series Btu h A Series 09 9 000 00 No electric heat 12 12 000 25 2 5 KW 18 18 000 34 3 4 KW 24 24 000 50 5 0 KW VOLTAGE _ 208 230V 1Ph 60Hz Serial Number Identification Guide SERIAL NUMBER 00001 YEAR MANUFACTURED PRODUCTION RUN
81. to dry thoroughly before reinstalling them ELECTRONIC ELECTRICAL MECHANICAL Periodically at least yearly or bi yearly inspect all control components electronic electrical and mechanical as well as the power supply Use proper testing instruments voltmeter ohmmeter ammeter wattmeter etc to perform elec trical tests Use an air conditioning or refrigeration thermometer to check room outdoor and coil operating tempera tures Use a sling psychrometer to measure wet bulb temperatures indoors and outdoors Inspect the surrounding area inside and outside to ensure that the unit s clearances have not been compromised or altered ROUTINE MAINTENANCE Continued NOTICE Do not drill holes in the bottom of the drain pan or the underside of the unit Not following this notice could result in damage to the unit or condensate water leaking inappropriately which could cause water damage to surrounding property SLEEVE DRAIN Inspect the sleeve and drain system periodically at least yearly or bi yearly and clean of all obstructions and debris Clean both areas with an antibacterial and antifungal cleaner Rinse both items thoroughly with water and ensure that the drain outlets are operating correctly Check the sealant around the sleeve and reseal areas as needed FRONT COVER Clean the front cover when needed Use a mild detergent Wash and rinse with warm water Allow it to dry thoroughly before reinstalling it in the ch
82. ulated as follows Having a wet coil creates additional resistance to airflow This addit ional resistance must be taken into consideration to obtain accurate airflow information 1 TON SYSTEM 18 000 Btu Operating on high speed 230 volts with dry coil measured external static pressure 20 Air Flow 500 In the same SYSTEM used in the previous example but having a WET coil you must use a correction factor of 94 i e 500 x 94 470 CFM to allow for the resistance internal of the condensate on the coil Itis importantto use the proper procedure to check external Static Pressure and determine actual airflow Since in the case of the VERT I PAK the condensate will cause a reduction in measured External Static Pressure for the given airflow It is also important to remember that when dealing with VERT I PAK units that the measured External Static Pressure increases as the resistance is added externally to the cabinet Example duct work filters grilles Checking Approximate Airflow If an inclined manometer or Magnehelic gauge is not available to check the External Static Pressure or the blower performance data is unavailable for your unit approximate air flow call be calculated by measuring the temperature rise then using tile following criteria KILOWATTS x 3413 Temp Rise x 1 08 Electric Heat Strips The approximate CFM actually being delivered can be calculated by using the following formula CFM DO N
83. ult in serious injury or death Undercharged Refrigerant Systems A check of the amperage drawn by the compressor An undercharged system will result in poor performance motor should show a lower reading Check the Unit low pressures etc in both the heating and cooling Specification After the unit has run 10 to 15 minutes cycle check the gauge pressures Gauges connected to system with an undercharge will have low head pressures and Whenever you service a unit with an undercharge of 9 substantially low suction pressures refrigerant always suspect a leak The leak must be repaired before charging the unit To check for an undercharged system turn the unit on allow the compressor to run long enough to establish working pressures in the system 15 to 20 minutes Reversing Accumulator During the cooling cycle you can listen carefully at the exit of the metering device into the evaporator an intermittent Mand hissing and gurgling sound indicates a low refrigerant Compressor Running 1 gt ter jal charge Intermittent frosting and thawing of the evaporator AmpeLawer is another indication of a low charge however frosting and thawing can also be caused by insufficient air over the evaporator Undercharged System Checks for an undercharged system can be made at the compressor If the compressor seems quieter than normal it is an indication of a low refrigerant charge Overch
84. unit s warranty We will not be responsible for and the user will pay for 1 Service calls to A Instruct on unit operation B Replace house fuses or correct house wiring C Clean or replace air filters D Remove the unit from its installed location when not accessible for service required E Correct improper installations 2 Parts or labor provided by anyone other than an authorized service center 3 Damage caused by A Accident abuse negligence misuse riot fire flood or acts of God B Operating the unit where there is a corrosive atmosphere containing chlorine fluorine or any damaging chemicals other than in a normal residential environment Unauthorized alteration or repair of the unit which in turn affects its stability or performance D Failing to provide proper maintenance and Service E Using an incorrect power source F Faulty installation or application of the unit We shall not be liable for any incidental consequential or special damages or expenses in connection with any use or failure of this unit We have not made and do not make any representation or warranty of fitness for a particular use or purpose and there is no implied condition of fitness for a particular use or purpose We make no expressed warranties except as stated in this certificate No one is authorized to change this certificate or to create for us any other obligation or liability in connection with this unit Any implied warranties shall las
85. ve the leads from compressor termi nals If the compressor is hot allow the overload to cool before starting check Using an ohmmeter test continu ity across the terminals of the external overload If you do not have continuity this indicates that the overload is open and must be replaced Internal Overload VPAK 24 K Btus The overload is embedded in the motor windings to sense the winding temperature and or current draw The overload is connected in series with the common motor terminal 1 With no power to unit remove the leads from the com pressor terminals Allow motor to cool 2 Using an ohmmeter test continuity between terminals C S and C R If no continuity the compressor overload is open and the compressor must be replaced LINE BREAK INTERNAL OVERLOAD Internal Overload OHMMETER Single Phase Resistance Test AWARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation Extreme care must be used if it becomes necessary to work on equipment with power applied Failure to do so could result in serious injury or death Remove the leads from the compressor terminals and set the ohmmeter on the lowest scale R x 1 Touch the leads of the ohmmeter from terminals common to start C to S Next touch the leads of the ohmmeter from terminals common to run C to Add values to 5 and to together and check resistance from

Friedrich 9 Air Conditioner User Manual

Contents

Download Pdf Manuals

Related Search

Related Contents