INSTALLATION MANUAL
Contents
1. R 410A OUTDOOR SPLIT SYSTEM HEAT PUMP MODELS 13 SEER amp 14 5 SEER THG D F GHGD THJ D F YHJ D F YHJR THJR SERIES 1 5 TO 5 TONS 1 amp 3 PHASE En A A 20 A M 4 _ A A AA d Y 4 AA 2 PPJ JU dM 1 2 l UE 3 WENN W e 42 A E aA ae T e M WE RP O AD b A wy b WR zl leat ae ev I 0 WE LZ EE A A 4 IS WW 2 EM BEEN uw LOO 1 1ZL1 1 aJ I AQA 0 1L ADM 1 88 WM 5 wn M M A 3 Ee ot uu Ku QAU A IW WM 1 2 AED RM X WEM 3 JEH A Vn A i SS I E 00 WW LEM 09 5 1 1 1L A A LA LN ML LLL Elem EC MM EA WA a elec A UU A A 1 Oi A UM A UM 1 A A 1 EM 1 A 1 DEM 1 11 CET WW i j LR M 5 QM 1 L I La LL SM EM oRREEk nn lw A DM 0 A A 7 1 wu UU IM NM 0 Jg I 8E 1 4A4EmggEb bL SCT L M CA A 0L 2570 1 1520 EN DM LL OO LAM LL EM I D 1 MR A A 4 1 E NN WD A AD E LL UM A C JW WM M A A E L COC UN AAA A SS a PERFORMANCE CERTIFIED m fo 6o 9 ww 000 REGISTRA ARI Standard 210 240 Unitary Small HP ISO 9001 Certified Quality Management System Certification applies only when the complete system is listed with ARI www aridirectory org LIST OF SECTIONS GENERAL ss ger moe co ben Pe E m in eee see dae 1 SYSTEM CHARGE EE 6 SAFETY 22429292 502 EEREN E qd od 1 ELECTRICAL CONNECTIONS2. In ES ODF YEL PNK BRN DEFROST PNK CONTROL BLK BLK AQQ RV WI 66 o gt lt cc C3 lt 1 a gt L ud ac a cp wo eo ORG WHT SEE UNIT INSTALLATION INSTRUCTIONS FOR LOW VOLTAGE TERMINATIONS 407154 UWD A 0508 15 LEGEND COLOR CODE DANGER SHOCK HAZARD TURN OFF ELECTRICAL POWER BEFORE SERVICING TO PREVENT POSSIBLE DAMAGE TO THE EQUIPMENT AND POSSIBLE PERSONAL INJURY CAPACITOR BLK BLACK CONTACTOR COIL BLU BLUE CRANKCASE HEATER BRN BROWN HIGH PRESS SWITCH GRN GREEN HEATER SWITCH GRY GREY HIGH TEMP SWITCH ORG ORANGE LIQUID SENSOR PNK PINK LOW PRESS SWITCH PUR PURPLE REVERSING VALVE RED RED START CAPACITOR WHT WHITE START RELAY YEL YELLOW CAUTION TO PREVENT ELECTRICAL SHOCK OPEN REMOTE DISCONNECT SO ELECTRICAL SUPPLY TO HEAT PUMP IS SHUT OFF COMPONENTS SHOWN IN DASH LINES ARE OPTIONAL DUAL CAPACITOR SHOWN SEPARATE 2 CAPACITORS MAY BE USED ON ACTUAL UNIT WIRING MUST CONFORM TO FAN MOTOR NATIONAL AND LOCAL CODES IF ANY OF THE ORIGINAL WIRE SUPPLIED WITH THIS UNIT MUST BE REPLACED IT MUST BE REPLACED WITH 105 C THERMOPLASTIC OR ITS EQUIVALENT WHERE POWER SUPPLY HAS ONE 1 240 VOLT CONDUCTOR AND ONE 1 NEUTRAL CONDUCTOR CONNECT L2 OF CONTACTOR TO NEUTRAL 5 3 6 SZ 4 Y 2 PLUG z Lc CY I m 208 230 BLK HIGH VOLTAGE FACTORY WIRING LOW VOL
3. PUR RED WHITE YELLOW PINK PURPLE RED 550377 UIM B 0510 DANGER SHOCK HAZARD TURN OFF ELECTRICAL POWER BEFORE SERVICING TO PREVENT POSSIBLE DAMAGE TO THE EQUIPMENT AND POSSIBLE PERSONAL INJURY CAUTION TO PREVENT ELECTRICAL SHOCK OPEN REMOTE DISCONNECT SO ELECTRICAL SUPPLY TO HEAT PUMP IS SHUT OFF COMPONENTS SHOWN IN DASH LINES ARE OPTIONAL DUAL CAPACITOR SHOWN SEPARATE CAPACITORS MAY BE USED ON ACTUAL UNIT WIRING MUST CONFORM TO NATIONAL AND LOCAL CODES IF ANY OF THE ORIGINAL WIRE SUPPLIED WITH THIS UNIT MUST BE REPLACED IT MUST BE REPLACED WITH 105 C THERMOPLASTIC OR ITS EQUIVALENT WHERE POWER SUPPLY HAS ONE 1 240 VOLT CONDUCTOR AND ONE 1 NEUTRAL CONDUCTOR CONNECT L2 OF CONTACTOR TO NEUTRAL HIGH VOLTAGE FACTORY WIRING LOW VOLTAGE FACTORY WIRING OPTIONAL OR MODEL SPECIFIC FIELD WIRING LINE VOLTAGE DEFROST PNK CONTROL SEE UNIT INSTALLATION INSTRUCTIONS FOR LOW VOLTAGE TERMINATIONS 331677 UWD A 0307 13 550377 UIM B 0510 LEGEND COLOR CODE DANGER SHOCK HAZARD TURN OFF ELECTRICAL POWER BEFORE SERVICING TO PREVENT POSSIBLE DAMAGE TO THE EQUIPMENT AND POSSIBLE PERSONAL INJURY CAUTION TO PREVENT ELECTRICAL SHOCK OPEN REMOTE DISCONNECT SO ELECTRICAL SUPPLY TO HEAT PUMP IS SHUT OFF CAPACITOR CONTACTOR COIL CRANKCASE HEATER HIGH PRESS SWITCH HEATER SWITCH HIGH TEMP SWITCH LIQUID SENSOR LOW PRESS SWITCH REVERSING
4. 0 0 ees 10 TEST Input Functional 10 Defrost Initiate Curves 11 SECTION I GENERAL The outdoor units are designed to be connected to a matching indoor coil with sweat connect lines Sweat connect units are factory charged with refrigerant for a matching indoor coil plus 15 feet of field supplied lines Matching indoor coils are available with a thermal expansion valve or an orifice liquid feed sized for the most common usage The orifice size and or refrigerant charge may need to be changed for some indoor out door unit combinations elevation differences or total line lengths Refer to Application Data covering General Piping Recommendations and Refrigerant Line Length Part Number 247077 SECTION II SAFETY This is a safety alert symbol When you see this symbol on A labels or in manuals be alert to the potential for personal injury Understand and pay particular attention to the signal words DANGER WARNING or CAUTION DANGER indicates an imminently hazardous situation which if not avoided will result in death or serious injury WARNING indicates a potentially hazardous situation which if not avoided could result in death or serious injury CAUTION indicates a potentially hazardous situation which if not avoided may result in minor or moderate injury lt is also used to alert against unsafe practices and hazards involving only property dam age Improper installation may crea
5. DURING BRAZING OF LINES All outdoor unit and evaporator coil connections are copper to copper and should be brazed with a phosphorous copper alloy material such as Silfos 5 or equivalent DO NOT use soft solder The outdoor units have reusable service valves on both the liquid and vapor connections The total system refrigerant charge is retained within the outdoor unit during shipping and installation The reusable service valves are pro vided to evacuate and charge per this instruction Serious service problems can be avoided by taking adequate precau tions to assure an internally clean and dry system A CAUTION Dry nitrogen should always be supplied through the tubing while it is being brazed because the temperature is high enough to cause oxidation of the copper unless an inert atmosphere is provided The flow of dry nitrogen should continue until the joint has cooled Always use a pressure regulator and safety valve to insure that only low pressure dry nitrogen is introduced into the tubing Only a small flow is necessary to displace air and prevent oxidation PRECAUTIONS DURING BRAZING SERVICE VALVE Precautions should be taken to prevent heat damage to service valve by wrapping a wet rag around it as shown in Figure 4 Also protect all painted surfaces insulation and plastic base during brazing After braz ing cool joint with wet rag A WARNING This is not a backseating valve The service access port has a v
6. and compare to the value obtained in step 4 6 Add charge if the measured liquid pressure is lower than the rec ommended value Remove recover charge if the measured liquid pressure is above the recommended value Example The liquid pressure listed at the intersection of the indoor WB and the outdoor DB 320 psig Pressure at the liquid valve is 305 psig It would be necessary to add refrigerant to increase the liquid pressure to 320 psig Condenser subcooling is obtained by calculating the difference of the saturated refrigerant temperature of the pressure measured at the liquid base valve and the liquid tube temperature as measured at the liquid base valve Subcooling Temp TC Saturated Temp TS Liquid Temp T A CAUTION IT IS UNLAWFUL TO KNOWINGLY VENT RELEASE OR DIS CHARGE REFRIGERANT INTO THE OPEN AIR DURING REPAIR SERVICE MAINTENANCE OR THE FINAL DISPOSAL OF THIS UNIT SECTION VIII ELECTRICAL CONNECTIONS GENERAL INFORMATION amp GROUNDING Check the electrical supply to be sure that it meets the values specified on the unit nameplate and wiring label Power wiring control low voltage wiring disconnect switches and over current protection must be supplied by the installer Wire size should be sized per NEC requirements Johnson Controls Unitary Products A CAUTION All field wiring must USE COPPER CONDUCTORS ONLY and be in accordance with Local National F
7. cap on equalizer fitting 4 Install Schrader Valve Core supplied with the outdoor unit into equalizer fitting using a valve core tool 5 Loosen and remove the liquid line fitting from the orifice distributor assembly Note that the fitting has right hand threads 6 Install proper size orifice supplied with outdoor unit Refer to sup plied Tabular Data Sheet for specific orifice size and indoor coil match up 7 After orifice is installed reinstall the liquid line to the top of the ori fice distributor assembly Hand tighten and turn an additional 1 8 turn to seal Do not over tighten fittings 8 Leak test system 9 Replace black plastic cap on equalizer fitting 10 Slide indoor coil back into cabinet turn counter clockwise to remove ORIFICE DISTRIBUTOR LIQUID LINE SWIVEL COUPLING di This fitting is a right hand thread rs FIGURE 5 Orifice Installation SECTION V TXV INSTALLATIONS For installations requiring a TXV the following are the basic steps for installation For detailed instructions refer to the Installation Instructions accompanying the TXV kit Install TXV kit as follows 1 Relieve the holding charge by depressing the Schrader valve stem located in the end of the liquid line Cut the spundown copper to allow installation of the suction line 2 After holding charge is completely discharged loosen and remove the Schrader cap seal Johnson Controls Unitary Products 550377 UI
8. humidistat in this control opens the humidistat contacts on humidity rise To install refer to instructions packaged with the acces sory Prior to the installation of the dehumidification control the jumper across the HUMIDISTAT terminals on the indoor variable speed air han dler or furnace CFM selection board must be removed During cooling if the relative humidity in the space is higher than the desired set point of the dehumidification control the variable speed blower motor will operate at lower speed until the dehumidification con trol is satisfied A 40 6096 relative humidity level is recommended to achieve optimum comfort If a dehumidification control is installed it is recommended that a mini mum air flow of 325 cfm ton be supplied at all times For connection diagrams for all UPG equipment refer to Low Voltage System Wiring document available online at www upgnet com in the Product Catalog Section CFM SELECTION BOARD SETTINGS For proper system operation the CFM Selection control jumpers must be set properly Refer to the Tabular Data Sheet for the recommended air flow settings for each size condensing unit Set the cooling speed per the instructions for the air handler or furnace by selecting the correct COOL and ADJ taps Verify the airflow using the LED display on the CFM selection board SECTION IX SYSTEM START UP ENERGIZE CRANKCASE HEATER If this unit is equipped with a crankcase heater for the compressor
9. its components In particular the control prevents contactor chatter during low voltage conditions If the voltage drops below approximately 19 VAC the con trol will continue to energize any relays that are already energized but will not energize any additional relays until the voltage level increases If the voltage drops below approximately 16 VAC the control will imme diately de energize the relay outputs and will not energize any relays until the voltage level increases TEST INPUT The control includes a TEST input connector that can be used for vari ous testing functions during installation and service The TEST input connector is shown in Figures 11 amp 12 The following table summarizes the behavior of the control when the two TEST pins are connected More detailed descriptions of the various functions are included in other sections of this document TABLE 2 TEST Input Functionality Duration of Connection seconds Control Behavior Demand Defrost Lessthan2 Less than 2 Bypass ASCD If Y is present 2 9 2 6 and pressure switch is closed contactors will be energized Gear Toco Initiate defrost cycle Demand More than 9 More than 6 only Energize X L with active defrost curve flash code Continue defrost cycle Demand Connection not removed only and X L flash code until TEST connection removed FAULT CODE DISPLAY X L Output The X L terminal of the heat pump control is typically connected to the X L input
10. line is required in addition to the factory installed liquid line drier Operate the system for 10 hours Monitor the suction drier pressure drop If the pressure drop exceeds 3 psig replace both the suction line and liquid line driers After a total of 10 hours run time where the suction line pressure drop has not exceeded 3 psig replace the liquid line drier and remove the suction line drier Never leave a suction line drier in the system longer than 50 hours of run time MINIMUM 18 SERVICE 60 OVERHEAD CLEARANCE ACCESS CLEARANCE ON ONE SIDE THERMOSTAT WEATHERPROOF DISCONNECT SWITCH 10 CLEARANCE AROUND PERIMETER NE NOTE ALL OUTDOOR WIRING MUST BE WEATHERPROOF FIGURE 1 Typical Installation with Required Clearances NEC CLASS 1 WIRING TO FURNACE OR AIR HANDLER TERMINAL BLOCK CONTROL ACCESS SEAL OPENING S WITH PANEL PERMAGUM OR EQUIVALENT Johnson Controls Unitary Products GROUND INSTALLATION The unit may be installed at ground level on a solid base that will not shift or settle causing strain on the refrigerant lines and possible leaks Maintain the clearances shown in Figure 1 and install the unit in a level position Normal operating sound levels may be objectionable if the unit is placed directly under windows of certain rooms bedrooms study etc Condensate will drain from beneath the coil of the outdoor unit during the defrost cycle Normally this condensate may be allowed
11. specifically designed to handle R 410A Do not use an R 22 TXV A liquid line filter drier is required on every unit LIMITATIONS The unit should be installed in accordance with all National State and Local Safety Codes and the limitations listed below 1 Limitations for the indoor unit coil and appropriate accessories must also be observed 2 The outdoor unit must not be installed with any duct work in the air stream The outdoor fan is the propeller type and is not designed to operate against any additional external static pressure 3 The maximum and minimum conditions for operation must be Observed to assure a system that will give maximum performance with minimum service 4 The maximum allowable line length for this product is 75 feet 1 Operation below this temperature is permissible for a short period of time during morning warm up SECTION III UNIT INSTALLATION LOCATION Before starting the installation select and check the suitability of the location for both the indoor and outdoor unit Observe all limitations and clearance requirements The outdoor unit must have sufficient clearance for air entrance to the condenser coil for air discharge and for service access See Figure 1 NOTICE For multiple unit installations units must be spaced a minimum of 24 inches apart coil face to coil face If the unit is to be installed on a hot sun exposed roof or a black topped ground area t
12. 7 UNIT INSTALLATION 62 26056400006 Chee kin o RE mh non 2 SYSTEMSIAHI UP cence tcc tutes nadaa 9 ORIFICE INSTALLATION lt lt lt lt lt lt lt oo 5 SYSTEM OPERATION 5 2 d ars ica doa dB i Bisogna a 10 TXV INSTALLATIONS eene 5 INSTRUCTING THE OWNER es 12 EVACUATION succi n 6 WIRING DIAGRAM een n n KIKI 13 LIST OF FIGURES Typical Installation with Required Clearances 2 Heat Pump Flow Diagram 0 000 cee ee eee 9 TUDNO Bee 3 Time Temp Control Module 10 Underground Installation 3 Demand Defrost Control Module o o ooooooooo 10 Heat ProlBelDIE aux EE E cee diea EE a e ERR e 4 Defrost Operation Curves 0 0000 cece ees 12 Orifice TnstallallOl 3 2S oak beeen satwevokee a ae 5 Wiring Diagram Single Phase Demand Defrost 13 Outdoor Unit Control Box Single Phase 7 Wiring Diagram Single Phase Time Temp 14 Outdoor Unit Control Box Three Phase o o o oooooo 7 Wiring Diagram Three Phase Demand Defrost 15 Typical Field Wiring Air Handler Electrical Heat Single Phase 8 Wiring Diagram Three Phase Time Temp 16 Typical Field Wiring Air Handler Electrical Heat Three Phase 8 LIST OF TABLES R 410A Saturation Properties 00000 0c eee eee 9 X L Output Categories
13. M B 0510 3 Loosen and remove distributor cap seal 4 Install the thermal expansion valve to the orifice distributor assem bly with supplied fittings Hand tighten and turn an additional 1 4 turn to seal Do not overtighten fittings 5 Install the liquid line to the top of the thermal expansion valve with fitting supplied with the liquid line Hand modify the liquid line to align with casing opening Hand tighten the liquid line and an addi tional 1 4 turn to seal 6 Install the TXV equalizer line into the vapor line as follows a Hand tighten the 1 4 SAE nut to the Schrader fitting and an additional 1 3 turn to seal 7 nstall the TXV bulb to the vapor line near the equalizer line using the bulb clamp s furnished with the TXV assembly Ensure the bulb is making maximum contact a Bulb should be installed on a horizontal run of the vapor line if possible On lines under 7 8 O D the bulb may be installed on top of the line With 7 8 O D and over the bulb should be installed at the position of about 2 or 10 o clock b If bulb installation is made on a vertical run the bulb should be located at least 16 40 6 cm from any bend and on the tubing sides opposite the plane of the bend The bulb should be positioned with the bulb tail at the top so that the bulb acts as a reservoir c Bulb should be insulated using thermal insulation provided to protect it from the effect of the surrounding ambient tempera ture Cover comp
14. Repair the leak and test again To verify that the system has no leaks simply close the valve to the vac uum pump suction to isolate the pump and hold the system under vac uum Watch the micron gauge for a few minutes If the micron gauge indicates a steady and continuous rise it s an indication of a leak If the gauge shows a rise then levels off after a few minutes and remains fairly constant its an indication that the system is leak free but still con tains moisture and may require further evacuation if the reading is above 500 microns SECTION VII SYSTEM CHARGE The factory charge in the outdoor unit includes enough charge for the unit a 15 ft 4 6 m line set and the smallest indoor coil match up Some indoor coil matches may require additional charge See tabular data sheet provided in unit literature packet for charge requirements A CAUTION Do not leave the system open to the atmosphere The TOTAL SYSTEM CHARGE must be permanently stamped on the unit data plate Total system charge is determined as follows 1 Determine outdoor unit charge from tabular data sheet 2 Determine indoor coil adjustment from tabular data sheet 3 Calculate the line charge using the tabular data sheet if line length is greater than 15 feet 4 6 m 4 Total system charge item 1 item 2 item 3 5 Permanently stamp the unit data plate with the total amount of refrigerant in the system Use the following cha
15. T FOR THE ACTUAL ARRANGEMENT OF THE TERMINALS 4CONNECT POWER WIRING TO TERMINAL BLOCK 3TB ON UNITS WITHOUT ELECTRIC HEAT OR CIRCUIT BREAKER FIGURE 8 Typical Field Wiring Air Handler Electrical Heat Three Phase Johnson Controls Unitary Products 550377 UIM B 0510 ALL FIELD WIRING TO BE IN ACCORDANCE WITH ELECTRIC CODE NEC AND OR LOCAL CODES THERMOSTAT INSTALLED JUMPER 1 JUMPER TERMINALS E AND W TO HEAT ON FIRST STAGE DURING EMERGENCY HEAT 2 GND TERMINAL NOT USED ON ALL THERMOSTATS 11 LUG CIRCUIT To BREAKER POWER WIRING 24V CONTROL WIRING NEC CLASS 2 INDOOR UNIT LOW VOLTAGE TERMINAL BLOCK 3 4 IN AIR HANDLER WITH ELECTRIC HEAT DEHUMIDIFICATION CONTROL CONNECTION Humidistat Jumper must be removed OUTDOOR UNIT DEFROST CONTROL CONTACTOR POWER WIRING 208 230 1 60 230 1 50 3 CHECK THE LOW VOLTAGE TERMINAL BLOCK ON THE INDOOR UNIT FOR THE ACTUAL ARRANGEMENT OF THE TERMINALS 4 CONNECT POWER WIRING TO TERMINAL BLOCK 3TB ON UNITS WITHOUT ELECTRIC HEAT OR CIRCUIT BREAKER FIGURE 9 Typical Field Wiring Air Handler Electrical Heat Single Phase DEHUMIDIFICATION CONTROL A dehumidification control accessory 2HU06700124 may be used with variable speed air handlers or furnaces in high humidity areas This control works with the variable speed indoor unit to provide cooling at a reduced air flow lowering evaporator temperature and increasing latent capacity The
16. TAGE FACTORY WIRING OPTIONAL OR MODEL SPECIFIC ss e FIELD WIRING LINE VOLTAGE HPS HTS LPS YEL YEL pe BRN BRN IVA PNK an a PNK CC um BLK 208 230 BLK 208 230 YEL 460V T STAT DEFROST CONTROL RE PNK a e BRN BLK PNK e RV CONTACTOR USE COPPER CONDUCTORS ONLY SEE UNIT INSTALLATION INSTRUCTIONS um Ny FOR LOW VOLTAGE TERMINATIONS 208 230 VAC 60 Hz 3 PHASE SUPPLY 460 VAC 60 Hz 3 PHASE SUPPLY 915 VAC 60 Hz 3 PHASE SUPPLY 380 415 VAC 60 Hz 3 PHASE SUPPLY 545127 UWD A 0307 FIGURE 17 Wiring Diagram Three Phase Time Temp Subject to change without notice Published in U S A 550377 UIM B 0510 Copyright O 2010 by Johnson Controls Inc All rights reserved Supersedes 550377 UIM A 0410 Johnson Controls Unitary Products 5005 York Drive Norman OK 73069
17. VALVE START CAPACITOR START RELAY BLK BLACK BLU BLUE BRN BROWN GRN GREEN GRY GREY ORG ORANGE PNK PINK PUR PURPLE RED RED WHT WHITE YEL YELLOW COMPONENTS SHOWN IN DASH LINES ARE OPTIONAL UAL CAPACITOR SHOWN SEPARATE D 2 CAPACI TORS MAY BE USED ON ACTUAL UNIT WIRING MUST CONFORM TO FAN MOTOR NATIONAL AND LOCAL CODES IF ANY OF THE ORIGINAL WIRE SUPPLIED WITH THIS UNIT MUST BE REPLACED IT MUST BE REPLACED WITH 105 C THERMOPLASTIC OR ITS EQUIVALENT WHERE POWER SUPPLY HAS ONE 1 240 VOLT CONDUCTOR AND ONE 1 NEUTRAL CONDUCTOR CONNECT L2 OF CONTACTOR TO NEUTRAL s HIGH VOLTAGE FACTORY WIRING LOW VOLTAGE FACTORY WIRING OPTIONAL OR MODEL SPECIFIC es es es FIELD WIRING LINE VOLTAGE BRN PNK T STAT BLU LS C ES YEL DEFROST CONTROL oo PNK a zm kis BRN BLK PNK m RV CONTACTOR Ex oj 2 e El Z a ac aa gt o aa USE COPPER CONDUCTORS ONLY I d J SEE UNIT INSTALLATION INSTRUCTIONS FOR LOW VOLTAGE TERMINATIONS 208 230 VAC 60 Hz PHASE SUPPLY 944123 UWD A 0301 FIGURE 15 Wiring Diagram Single Phase Time Temp Johnson Controls Unitary Products LEGEND AS CAP CC CCH AMBIENT SENSOR CAPACITOR CONTACTOR COIL CRANKCASE HEATER HIGH PRESS SWITCH HEATER SWITCH LIQUID SENSOR LOW PRESS SWITCH REVERSING VALVE START CAPACITOR START RELAY BLK BLU BRN GRN GR
18. Y ORG PUR BED WHT TEL COLOR CODE BLACK BLUE BROWN BR WH BROWN WHITE GREEN GREY ORANGE PURPLE RED WHITE YELLOW HIGH VOLTAGE FACTORY WIRING LOW VOLTAGE FACTORY WIRING OPTIONAL WIRING ss FIELD WIRING 460V FAN RELAY WIRING FAN MOTOR Cn w o aon gt gt OO BR WH mM 460V l usc copper CONDUCTORS ONLY I l l EW 208 230 VAC 60 HZ 3 PHASE SUPPLY 460 VAC 60 HZ 3 PHASE SUPPLY 380 415 VAC 50 HZ 3 PHASE SUPPLY FIGURE 16 Wiring Diagram Three Phase Demand Defrost Johnson Controls Unitary Products FAN RELAY LINE VOLTAGE BLK CONTACTOR PLUG 550377 UIM B 0510 DANGER SHOCK HAZARD TURN OFF ELECTRICAL POWER BEFORE SERVICING TO PREVENT POSSIBLE DAMAGE TO THE EQUIPMENT AND POSSIBLE PERSONAL INJURY TO CAUTION PREVENT ELECTRICAL SHOCK OPEN REMOTE DISCONNECT SO ELECTRICAL SUPPLY TO HEAT PUMP IS SHUT OFF BLK BLK COMPONENTS SHOWN IN DASH LINES ARE OPTIONAL WIRING MUST CONFORM TO NATIONAL AND LOCAL CODES IF ANY OF THE ORIGINAL WIRE SUPPLIED WITH THIS UNIT MUST BE REPLACED IT MUST BE REPLACED WITH 105 C THERMOPLASTIC OR ITS EQUIVALENT WHERE POWER SUPPLY HAS ONE 1 240 VOLT CONDUCTOR AND ONE 1 NEUTRAL CONDUCTOR CONNECT L2 OF CONTACTOR TO NEUTRAL FAN RELAY AND WIRES LABELED 460V ONLY USED ON 380 415V OR 460V 208 230V PETRUM PM 208 230V
19. a warning label with an adhesive back is supplied in the unit installation instruction packet This label should be attached to the field supplied disconnect switch where it will be easily seen In order to energize the crankcase heater set the indoor cooling ther mostat to the OFF position Close the line power disconnect to the unit IMPORTANT An attempt to start the compressor without at least 8 hours of crankcase heat will damage the compressor WITH POWER TO UNIT AND THERMOSTAT IN COOLING POSITION 1 In the cooling cycle discharge gas is pumped to the outdoor coil which is the condenser The indoor coil is the evaporator 2 If fan switch is in ON position a circuit is made through blower relay to provide continuous blower operation 3 With fan switch in AUTO position a circuit is made from thermo stat cooling contact through blower relay to provide blower opera tion 4 System will cycle with thermostat demand to provide cooling as needed Johnson Controls Unitary Products 550377 UIM B 0510 TABLE 1 R 410A Saturation Properties 4380 00 EC NENNEN NENNEN CENE AREE ee 8 8 2 8 188 9 p we A A oc Je ee cem iar 08 a8 98 a8 98 89 0 e CR Y e Re TR A A PA L e qo RR p ES p o RS gt Te NEE Ws e e j v9 95 71 TM L rq wr qox posee o ea L 99 p 5 jT gc Jp Je We sj bs qp e n e e TT 9 TT 115 116 117 118 FIELD CONNECTED LINE Empty in cooling full in heatin
20. alve core Opening or closing valve does not close service access port If the valve stem is backed out past the chamfered retaining wall the O ring can be damaged causing leakage or system pressure could force the valve stem out of the valve body possibly causing personal injury Valve can be opened by removing the plunger cap and fully inserting a hex wrench into the stem and backing out counter clockwise until valve stem just touches the chamfered retaining wall FIGURE 4 Heat Protection Connect the refrigerant lines using the following procedure 1 Remove the cap and Schrader core from both the liquid and vapor service valve service ports at the outdoor unit Connect low pres sure nitrogen to the liquid line service port 2 Brazethe liquid line to the liquid valve at the outdoor unit Be sure to wrap the valve body with a wet rag Allow the nitrogen to con tinue flowing Refer to the Tabular Data Sheet for proper liquid line sizing 3 Goto SECTION IV or SECTION V for orifice or TXV Installation depending on application A CAUTION Do not install any coil in a furnace which is to be operated during the heating season without attaching the refrigerant lines to the coil The coil is under 30 to 35 psig inert gas pressure which must be released to prevent excessive pressure build up and possible coil damage 4 Braze the liquid line to the evaporator liquid connection Nitrogen shoul
21. d be flowing through the evaporator coil 5 Slide the grommet away from the vapor connection at the indoor coil Braze the vapor line to the evaporator vapor connection After the connection has cooled slide the grommet back into original position Refer to the Tabular Data Sheet for proper vapor line siz ing 6 Protect the vapor valve with a wet rag and braze the vapor line connection to the outdoor unit The nitrogen flow should be exiting the system from the vapor service port connection After this con nection has cooled remove the nitrogen source from the liquid fit ting service port 7 Replace the Schrader core in the liquid and vapor valves 8 Leak test all refrigerant piping connections including the service port flare caps to be sure they are leak tight DO NOT OVER TIGHTEN between 40 and 60 inch lbs maximum 9 Evacuate the vapor line evaporator and the liquid line to 500 microns or less NOTICE Line set and indoor coil can be pressurized to 250 psig with dry nitrogen and leak tested with a bubble type leak detector Then release the nitrogen charge Do not use the system refrigerant in the outdoor unit to purge or leak test 10 Replace cap on service ports Do not remove the flare caps from the service ports except when necessary for servicing the system A CAUTION Do not connect manifold gauges unless trouble is suspected Approximately 3 4 ounce of refrigerant will be lo
22. e selec tion jumper is in a numbered position that is not described in Table 4 or if the defrost curve selection jumper is missing The control will display the proper fault code when a defrost curve jumper error is present The control will display the active defrost curve using the X L terminal when the heat pump is operating in a defrost cycle that has been forced using the TEST inputs For instance the X L output will be energized with two flashes when defrost curve 2 is active The control only reads the jumper input when the Y and W thermostat inputs are de energized If a jumper position is changed while either of these inputs is energized the control will not act upon the jumper changes until the thermostat calls are de energized or power 24 VAC to the control is cycled Defrost Cycle Initiation The control will allow the heat pump to operate in the heating mode until the combination of outdoor ambient and outdoor coil temperatures indi cate that a defrost cycle is necessary The control will initiate a defrost cycle when the liquid line temperature is below the initiate point for the measured ambient temperature See Figure 13 continuously for 4 1 2 minutes This delay eliminates unnec essary defrost cycles caused by refrigeration surges such as those that occur at the start of a heating cycle The control will initiate a defrost cycle every 6 hours accumulated com pressor run time to recirculate refrigerant lubricants Thi
23. e warming the conditioned space The defrost cycle will be terminated when the defrost thermostat is opened at 55 F or 10 minutes of compressor accumulated run time whichever comes first NOTICE The defrost thermostat delay will make the coil temperature about 75 80 F Please note that the timer will stop the circuit when R to Y is disconnected Demand Defrost 13 Seer 1 5 ton 14 5 Seer 1 5 4 Ton The control maintains proper airflow through the outdoor coil during heating operation by melting frost and ice that may form on the coil Frost may accumulate unevenly in different sections of the coil because of the arrangement of the refrigeration circuit within the coil The control may initiate a defrost cycle even when the coil is not completely cov ered with frost This is normal operation The control regulates the defrost operation of the heat pump based on accumulated compressor run time outdoor coil temperature and out door ambient temperature The control will cause the unit to operate in the normal heating mode until it determines that a defrost cycle is needed All defrost timings are based on accumulated compressor run time Operation The defrost mode is equivalent to the cooling mode except that the out door fan motor is de energized The control shall do the following to ini tiate a defrost cycle De energize the outdoor fan Energize the reversing valve Energize the auxiliary heat out
24. en the thermostat is satis fied or when the thermostat is set to SYSTEM OFF and back to HEAT or COOL mode 12 2 The TEST terminals are shorted for more than two seconds When the soft lockout condition is reset the control will stop displaying the fault code and will respond to thermostat inputs normally SECTION VI INSTRUCTING THE OWNER Assist owner with processing warranty cards and or online registration Review Owners Guide and provide a copy to the owner and guidance on proper operation and maintenance Instruct the owner or the opera tor how to start stop and adjust temperature setting When applicable instruct the owner that the compressor is equipped with a crankcase heater to prevent the migration of refrigerant to the compressor during the OFF cycle The heater is energized only when the unit is not running If the main switch is disconnected for long peri ods of shut down do not attempt to start the unit until 8 hours after the switch has been connected This will allow sufficient time for all liquid refrigerant to be driven out of the compressor The installer should also instruct the owner on proper operation and maintenance of all other system components MAINTENANCE 1 Dirt should not be allowed to accumulate on the outdoor coils or other parts in the air circuit Clean as often as necessary to keep the unit clean Use a brush vacuum cleaner attachment or other suitable means 2 The outdoor fan motor is pe
25. ending around obstruction is necessary If soft copper must be used care must be taken to avoid sharp bends which may cause a restriction 2 The lines should be installed so that they will not obstruct service access to the coil air handling system or filter 3 Care must also be taken to isolate the refrigerant lines to minimize noise transmission from the equipment to the structure 4 The vapor line must be insulated with a minimum of 1 2 foam rub ber insulation Armaflex or equivalent Liquid lines that will be exposed to direct sunlight and or high temperatures must also be insulated 5 Tape and suspend the refrigerant lines as shown DO NOT allow tube metal to metal contact See Figure 2 6 Use PVC piping as a conduit for all underground installations as shown in Figure 3 Buried lines should be kept as short as possible to minimize the build up of liquid refrigerant in the vapor line during long periods of shutdown 7 Pack fiberglass insulation and a sealing material such as perma gum around refrigerant lines where they penetrate a wall to reduce vibration and to retain some flexibility 8 See Form 247077 for additional piping information Sheet Metal Hanger Liquid Line ee Incorrect Correct Insulated Vapor Line FIGURE 2 Tubing Hanger TO INDOOR COIL LIQUID LINE TO OUTDOOR UNIT INSULATED LA tt PVC CONDUIT FIGURE 3 Underground Installation 550377 UIM B 0510 PRECAUTIONS
26. g INDOOR COIL Not included in all Units K OUTDOOR ES 8 4 WAY REVERSING VALVE FILTER DRYER Da Solid core p Toe e SUCTION COMPRESSOR y ACCUMULATOR lA 4 MEE BI FLOW BI FLOW SENSOR TXV CHECK TXV CHECK VALVE OR ORIFICE Heating VALVE Cooling TEST gt 8020808 O FUo oUF DEMAND DEFROST CURVE SELECTION JUMPER ALTERNATE CONFIGURATION O PRESSURE VALVE SWITCH FIGURE 12 Demand Defrost Control Module PRESSURE COMP RIY DFST Jill hl fil num FIGURE 11 Time Temp Control Module Johnson Controls Unitary Products 9 550377 UIM B 0510 SECTION V SYSTEM OPERATION ANTI SHORT CYCLE DELAY The control includes a five minute anti short cycle delay ASCD timer to prevent the compressor from short cycling after a power or thermo stat signal interruption The ASCD timer is applied when the control is first powered from the indoor unit thermostat and immediately following the completion of a compressor run cycle The compressor and the out door fan will not operate during the five minutes that the timer is active The ASCD timer can be bypassed by connecting the TEST terminals for three seconds while the thermostat is calling for compressor opera tion Y input signal energized LOW VOLTAGE DETECTION The control monitors the transformer secondary 24 VAC voltage and provides low voltage protection for the heat pump and
27. he unit should be raised sufficiently above the roof or ground to avoid taking the accumulated layer of hot air into the outdoor unit Provide an adequate structural support ADD ON REPLACEMENT RETROFIT When this unit is being used as a replacement for an R 22 unit it is required that the outdoor unit indoor coil and metering device all be replaced The following steps should be performed in order to insure proper system operation and performance Line set change out is also recommended 1 Change out of the indoor coil to an approved R 410A coil con densing unit combination with the appropriate metering device 2 Change out of the line set when replacing an R 22 unit with an R410 A unit is highly recommended to reduce cross contamina tion of oils and refrigerants 3 dfchange out of the line set is not practical then the following pre cautions should be taken nspect the line set for kinks sharp bends or other restrictions and for corrosion Determine if there are any low spots which might be serving as oil traps Flush the line set with a commercially available flush kit to remove as much of the existing oil and contaminants as possible nstall a suction line filter drier to trap any remaining contami nants and remove after 50 hours of operation 4 If the outdoor unit is being replaced due to a compressor burnout then installation of a 10096 activated alumina suction line filter drier in the suction
28. hen power is applied to the control and after the completion or termination of each defrost cycle the control will start a 40 minute timer When this timer expires the control will allow another defrost cycle when needed The timer is based on accumulated compressor run time Defrost Termination The control will terminate the defrost cycle immediately after the liquid line temperature reaches 80 F or after eight minutes of defrost opera tion The control will do the following to terminate a defrost cycle Energize the outdoor fan De energize the reversing valve De energize the auxiliary heat output through the W1 66 terminal Reset and restart the 40 minute defrost inhibit timer Compressor Delay When Defrost Jumper Position 2 is selected the compressor is shut down for 30 seconds entering and exiting defrost mode This delay is present in normal operation but is not present when the TEST pins are shorted to force a defrost cycle Position 1 is recommended for recip rocating compressors and Position 2 is recommended for scroll com pressors Defrost Curve Selection Jumper Position YHJR THJR THRD GHRD CHJD CHJF LHJD LHJF YHJD YHJF THJD THJF All Other Models THGD GHGD Jumper settings 1 3 are different defrost curve settings 4 amp P will not work in application REGION C Defrost Terminated REGION E No call for defrost REGION B No call for Defrost Time Defro
29. ire Safety amp Electrical Codes S This unit must be grounded with a separate ground wire in accor dance with the above codes 3 4 The complete connection diagram and schematic wiring label is located on the inside surface of the unit service access panel 5 Contactor Defrost Control Start Board Relay Optional Low Voltage Box Dual Fingered Run Fan Bushing Capacitor Reversible High G start Capacitor Voltage Conduit Plate d Optional FIGURE 6 Outdoor Unit Control Box Single Phase FIELD CONNECTIONS CONTROL WIRING 1 Route low voltage wiring into bottom of control box as shown in Figures 6 or 7 Make low voltage wiring connections inside the low voltage box per Figures 8 9 2 The complete connection diagram and schematic wiring label is located on the inside surface of the unit service access panel 3 Replace the control box cover removed in Step 2 4 All field wiring to be in accordance with national electrical codes NEC and or local city codes 5 Mount the thermostat about 5 ft above the floor where it will be exposed to normal room air circulation Do not place it on an out 550377 UIM B 0510 FIELD CONNECTIONS POWER WIRING Install the proper size weatherproof disconnect switch outdoors and within sight of the unit Remove the screws from the control box cover and remove from unit Run power wiring from the disconnect switch to the unit Route wires from disconnect through power wiri
30. letely to insulate from air stream In all cases mount the TXV bulb after vapor line is brazed and has had sufficient time to cool Schrader valve core MUST NOT be installed with TXV installation Poor system performance or system failure could result A CAUTION Dry nitrogen should always be supplied through the tubing while it is being brazed because the temperature is high enough to cause oxidation of the copper unless an inert atmosphere is provided The flow of dry nitrogen should continue until the joint has cooled Always use a pressure regulator and safety valve to insure that only low pressure dry nitrogen is introduced into the tubing Only a small flow is necessary to displace air and prevent oxidation All connections to be brazed are copper to copper and should be brazed with a phosphorous copper alloy material such as Silfos 5 or equivalent DO NOT use soft solder Install the TXV bulb to the vapor line near the equalizer line using the two bulb clamps furnished with the TXV assembly Ensure the bulb is making maximum contact Refer to TXV installation instruction for view A CAUTION In all cases mount the TXV bulb after vapor line is brazed and has had sufficient time to cool 550377 UIM B 0510 SECTION VI EVACUATION It will be necessary to evacuate the system to 500 microns or less lf a leak is suspected leak test with dry nitrogen to locate the leak
31. n step 3 This is the recommended suction tube temperature at the service valve 5 Measure and record the suction tube temperature at the service valve and compare to the recommended temperature obtained in step 4 6 Add charge if the measured suction temperature in step 5 is above the recommended value Remove recover refrigerant if the mea sured suction temperature is below the recommended value Example The suction tube temperature listed on the table at the intersection of the outdoor DB and the suction pressure is 63 F Temperature of the suction tube at the service valve is 68 F It would be necessary to add refrigerant to drop the suction tube temperature to 63 F SUBCOOLING CHARGING METHOD TXV INDOOR For cooling operation unless otherwise specified the default subcool ing is 10 F 1 Set the system running in cooling mode by setting the thermostat at least 6 F below the room temperature and operate system for at least 10 15 minutes 2 Refer to the technical guide for the recommended indoor airflow and verify it is correct it should be about 400 SCFM per ton 3 Measure and record the indoor wet bulb WB and the outdoor ambient dry bulb DB temperature 4 Using the charging chart located on the unit find the intersection of the indoor wet bulb and the outdoor dry bulb This is the recom mended liquid pressure and subcooling value 5 Measure and record the pressure at the liquid valve pressure port
32. ng opening pro vided and into the unit control box as shown in Figures 6 or 7 Install the proper size time delay fuses or circuit breaker and make the power supply connections Contactor Defrost Control Board Fan Relay Low Voltage Box Fingered Bushing Reversible High Capacitor Voltage Conduit Plate FIGURE 7 Outdoor Unit Control Box Three Phase side wall or where it is exposed to the radiant effect from exposed glass or appliances drafts from outside doors or supply air grilles Route the 24 volt control wiring NEC Class 2 from the outdoor unit to the indoor unit and thermostat To eliminate erratic operation seal the hole in the wall at the ther mostat with permagum or equivalent to prevent air drafts affecting the operation of in the thermostat A Start Assist Kit is available and recommended for long line set applications or in areas of known low voltage problems ALL FIELD WIRING TO BE IN ACCORDANCE WITH ELECTRIC CODE NEC AND OR LOCAL CODES THERMOSTAT JUMPER JUMPER TERMINALS E AND W TO HEAT ON FIRST STAGE DURING EMERGENCY HEAT TERMINAL NOT USED ON ALL THERMOSTATS Ar POWER WIRING 24V CONTROL WIRING NEC CLASS 2 INDOOR UNIT LOW VOLTAGE TERMINAL BLOCK 2 4 IN AIR HANDLER WITH ELECTRIC HEAT OUTDOOR UNIT DEFROST CONTROL POWER WIRING 208 230 3 60 SUPPLY 460 3 60 208 230 3 60 P 460 3 60 3CHECK THE LOW VOLTAGE TERMINAL BLOCK ON THE INDOOR UNI
33. of the room thermostat The thermostat uses this signal to notify the homeowner of a problem with the heat pump using an LED or LCD display When the control energizes the X L terminal the thermo stat displays the flash code so the homeowner can see it TABLE 3 X L Output Categories Pressure Switch lockout last mode of operation was heating 2 flashes Pressure Switch lockout last mode of operation was defrost 3 flashes Incorrect Defrost Curve jumper selection When the control locks out the compressor because of a pressure switch lockout it will energize the X L output as shown in Table 3 The control has a three second delay between fault code flashes If the conditions above exist during cooling mode the system could be in the loss of charge condition 10 DEFROST OPERATION Time Temperature Defrost 13 Seer 2 5 Ton The defrost control is a time temp control which includes a field select able tap located at board edge time period between defrost cycle 30 60 and 90 minutes The jumper is factory set at 60 minutes See Fig ure 13 The electronic timer and the defrost cycle will start only when the con tactor is energized and the defrost thermostat is closed The defrost thermostat is closed when the liquid temperature falls below approxi mately 31 F The defrost mode is identical to the cooling mode except that the out door fan motor stops and the first stage of heat is turned on through W1 66 to continu
34. put through the W1 66 terminal Begin the maximum defrost cycle length timer If the call for heating Y is removed from the control during the defrost cycle it will terminate the defrost cycle and de energize the compres sor The control will also stop the defrost cycle length timer but not reset it When the control receives another call for heating it will restart the defrost cycle and the timer at the point at which the call for heating was removed This will happen only if the liquid line temperature conditions allow defrost to occur Defrost Curves The control uses a set of defrost curve parameters that are selected using the defrost curve selection jumper The location of the defrost curve selection jumper is shown in Figure 13 Table 4 shows the jumper position that is appropriate for each heat pump model Jumper position 4 is not used and the control will not allow the compressor to operate when the jumper is in this position Johnson Controls Unitary Products Defrost Curve Selection The factory will place the defrost curve selection jumper in the P posi tion or in a numbered position appropriate for the specific heat pump model You should not have to change the defrost curve selection jumper during initial installation If the jumper is inadvertently moved it should be placed in the appropri ate numbered location based on the model number and Table 4 The control will also not energize the compressor if the defrost curv
35. r the liquid line drier must be exactly the same as marked on the original factory drier See Source 1 for O E M A CAUTION Failure to do so or using a substitute drier or a granular type may result in damage to the equipment Filter Drier Source 1 Part No Apply with Models ST 52636210000 As listed on the Energy Guide yellow sticker on the unit Johnson Controls Unitary Products 550377 UIM B 0510 PIPING CONNECTIONS The outdoor unit must be connected to the indoor coil using field sup plied refrigerant grade copper tubing that is internally clean and dry Units should be installed only with the tubing sizes for approved system combinations as specified in Tabular Data Sheet The charge given is applicable for total tubing lengths up to 15 feet See Application Data Part Number 247077 for installing tubing of longer lengths and elevation NOTICE Using a larger than specified line size could result in oil return prob lems Using too small a line will result in loss of capacity and other problems caused by insufficient refrigerant flow Slope horizontal vapor lines at least 1 every 20 feet toward the outdoor unit to facili tate proper oil return PRECAUTIONS DURING LINE INSTALLATION 1 Install the lines with as few bends as possible Care must be taken not to damage the couplings or kink the tubing Use clean hard drawn copper tubing where no appreciable amount of b
36. rging method whenever additional refrigerant is required for the system charge DO NOT attempt to pump Total System Charge into outdoor unit for maintenance service etc This may cause damage to the com pressor and or other components the outdoor unit only has enough volume for the factory charge not the Total System Charge Refrigerant charging should only be carried out by a qualified air conditioning contractor A CAUTION Compressor damage will occur if system is improperly charged On new system installations charge system per tabular data sheet for the matched coil and follow guidelines in this instruction If a calibrated charging cylinder or accurate weighing device is avail able add refrigerant accordingly Otherwise model specific charging charts are provided on the access panel of the unit SUPERHEAT CHARGING METHOD PISTON INDOOR 1 Setthe system running in cooling mode by setting the thermostat at least 6 F below the room temperature and operate system for at least 10 15 minutes 2 Refer to the technical guide for the recommended airflow and ver ify indoor airflow it should be about 400 SCFM per ton 3 Measure and record the outdoor ambient DB temperature and the suction pressure at the suction service valve 4 Using the charging chart located on the unit find the intersection of the outdoor ambient dry bulb and the suction pressure obtained i
37. rmanently lubricated and does not require periodic oiling 3 Ifthe coil needs to be cleaned it should be washed with Calgon Coilclean mix one part Coilclean to seven parts water Allow solution to remain on coil for 30 minutes before rinsing with clean water Solution should not be permitted to come in contact with painted surfaces 4 Refer to the furnace or air handler instructions for filter and blower motor maintenance 5 The indoor coil and drain pan should be inspected and cleaned regularly to prevent odors and assure proper drainage A CAUTION IT IS UNLAWFUL TO KNOWINGLY VENT RELEASE OR DIS CHARGE REFRIGERANT INTO THE OPEN AIR DURING REPAIR SERVICE MAINTENANCE OR THE FINAL DISPOSAL OF THIS UNIT SUBCOOLING CHARGE TABLE IS ON THE UNIT RATING PLATE Johnson Controls Unitary Products SECTION VII WIRING DIAGRAM LEGEND AS AMBIENT SENSOR CAP CAPACITOR KE CONTACTOR COLL CCH CRANKCASE HEATER HPS HIGH PRESS SWITCH HS HEATER SWITCH HTS HIGH TEMP SWITCH LS LIQUID SENSOR LPS LOW PRESS SWITCH RV REVERSING VALVE SC START CAPACITOR SR START RELAY FAN MOTOR CONTACTOR l l USE COPPER CONDUCTORS ONLY l 208 230 VAC 60 Hz PHASE SUPPLY FIGURE 14 Wiring Diagram Single Phase Demand Defrost Johnson Controls Unitary Products COLOR CODE BLK BLU BRN GRN GRY ORG WHT YEL BLACK BLUE BROWN GREEN GREY ORANGE PNK
38. s forced defrost timer will be reset and restarted following the completion or ter mination of a defrost cycle The control will also initiate a defrost cycle when the TEST terminals are shorted This feature allows an installer or service technician to start a defrost cycle immediately as required When the TEST terminals are shorted for more than six seconds with a Y input energized and the pressure switch input is closed the ASCD will be bypassed and the compressor and the W1 66 terminal to auxiliary heat will be energized TABLE 4 Defrost Initiate Curves 550377 UIM B 0510 When the TEST inputs are used to force a defrost cycle the control will ignore the state of the liquid line temperature and outdoor ambient tem perature inputs The coil does not have to be cold and the outdoor tem perature does not have to be within a certain range for the heat pump to be forced into a defrost cycle After the TEST input jumper is removed the defrost mode will be terminated as normal The defrost cycle length timer will not be started until the TEST input is removed If the TEST ter minals remain shorted the control will keep the unit in defrost mode Defrost Inhibition The control will not initiate a defrost cycle if the liquid line temperature is above 40 F unless the defrost cycle is forced using the TEST input The control will also prevent a defrost cycle from being initiated too soon after the initiation of the previous defrost cycle W
39. st 6 hour allowed 39N1VS3dMN31 1109 SNIT GINDM TERMINATE CURVE Time Defrost 6 hour prevented AMBIENT TEMPERATURE REGION D Defrost prevented from starting REGION A Call for Defrost FIGURE 13 Defrost Operation Curves Johnson Controls Unitary Products 11 550377 UIM B 0510 COOLING OPERATION During cooling operation the control will receive thermostat signals at the Y and O input terminals The control will energize the M compressor output terminal This signal energizes the coil of the compressor con tactor causing the compressor to run The control also delivers power to the COND FAN terminals causing the outdoor fan to operate The con trol energizes the REV VALVE terminal with 24VAC to switch the reversing valve HEATING OPERATION During normal heating mode the control will receive a thermostat signal at the Y input terminal The control will energize the M compressor out put terminal This signal energizes the coil of the compressor contactor causing the compressor to run The control also delivers power to the COND FAN terminals causing the outdoor fan to operate The reversing valve is not energized in heating mode EMERGENCY HEAT When the thermostat calls for emergency heat operation W signal with out a Y signal the control will de energize the compressor and ener gize the W1 66 terminal immediately PRESSURE SWITCH FAULT amp LOCKOUT The heat pump is equipped with a pressure swi
40. st each time a stan dard manifold gauge is connected 11 Release the refrigerant charge into the system Open both the liq uid and vapor valves by removing the plunger cap and with an allen wrench back out counter clockwise until valve stem just touches the chamfered retaining wall If the service valve is a ball valve use a cresent wrench to turn valve stem one quarter turn counterclockwise to open Do not overturn or the valve stem may break or become damaged See PRECAUTIONS DURING BRAZING SERVICE VALVE 12 Replace plunger cap finger tight then tighten an additional 1 12 turn 1 2 hex flat Cap must be replaced to prevent leaks Never attempt to repair any brazed connections while the system is under pressure Personal injury could result See System Charge section for checking and recording system charge Johnson Controls Unitary Products SECTION IV ORIFICE INSTALLATION Failure to install Schrader Valve Core on orifice applications could result in total refrigerant loss of the system Install Schrader Valve Core and Orifice as follows 1 Relieve the holding charge by depressing the Schrader valve stem located in the end of the liquid line Cut the spundown copper to allow installation of the suction line 2 Slide indoor coil out of cabinet far enough to gain access to equal izer fitting on the suction line 3 After holding charge is completely discharged remove black plas tic
41. tch loss of charge switch and an over temp switch units equipped with scroll compressor that are connected to the control at the pressure switch terminals If one of these switches input opens for more than 40 milliseconds the control will de energize the compressor If the switch closes and a thermostat call for compressor operation is present the control will apply the five minute anti short cycle delay timer and start the compressor when the timer expires When the compressor is started following a switch fault the control will start a six hour timer based on accumulated compressor run time If the control senses another opening of the switch before the timer expires it will cause a soft lockout condition The second opening of the switch must be greater than 160 milliseconds for the lockout to occur If the second opening is between 40 and 160 milliseconds the control will de energize the compressor but not cause a soft lockout condition If the control does not sense a second switch opening before the six hour timer expires the timer and counter will be reset During the soft lockout mode the control will de energize the compres sor and energize the X L output with the appropriate flash code The control will reset the soft lockout condition when any of the follow ing occur following removal of the fault condition 1 Power is cycled to the R or Y inputs of the control This will cause the soft lockout condition to be reset wh
42. te a condition where the operation of the product could cause personal injury or property damage Improper installation adjustment alteration service or mainte nance can cause injury or property damage Refer to this manual for assistance or for additional information consult a qualified con tractor installer or service agency A CAUTION This product must be installed in strict compliance with the enclosed installation instructions and any applicable local state and national codes including but not limited to building electrical and mechanical codes INSPECTION As soon as a unit is received it should be inspected for possible dam age during transit If damage is evident the extent of the damage should be noted on the carrier s delivery receipt A separate request for inspection by the carrier s agent should be made in writing See Local Distributor for more information 550377 UIM B 0510 550377 UIM B 0510 Requirements For Installing Servicing R 410A Equipment e Gauge sets hoses refrigerant containers and recovery system must be designed to handle the POE type oils and the higher pressures of R 410A e Manifold sets should be 800 psig high side and 250 psig low side with 550 psig low side restart All hoses must have a 700 psig service pressure rating e Leak detectors should be designed to detect HFC refrigerant e Recovery equipment including refrigerant recovery containers must be
43. to drain directly on the ground Elevate the unit sufficiently to prevent any blockage of the air entrances by snow in areas where there will be snow accumulation Check the local weather bureau for the expected snow accumulation in your area Isolate the unit from rain gutters to avoid any possible wash out of the foundation The outdoor unit should not be installed in an area where mud or ice could cause personal injury Remember that condensate will drip from the unit coil during heat and defrost cycles and that this condensate will freeze when the temperature of the outdoor air is below 32 F ROOF INSTALLATION When installing units on a roof the structure must be capable of sup porting the total weight of the unit including a pad lintels rails etc which should be used to minimize the transmission of sound or vibra tion into the conditioned space UNIT PLACEMENT 1 Provide a base in the pre determined location 2 Remove the shipping carton and inspect for possible damage 3 Compressor tie down bolts should remain tightened 4 Position the unit on the base provided NOTICE Heat pumps will defrost periodically resulting in water drainage The unit should not be located where water drainage may freeze and create a hazardous condition such as sidewalks and steps LIQUID LINE FILTER DRIER The heat pumps have a solid core bi flow filter drier located on the liquid NOTICE Replacements fo
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