Envision Peripherals Geothermal Indoor Split Heat Pumps User's Manual
Contents
1. L lockout signal Ext Pump Blue Red Black 5 DHW pump only in models with hot water generation option 1 6 Connection of remote unit that does not have a loop pump for slave operation 1 2 hp Total 208 230 60 1 is Comfort Alert EO DUC A Unit Power fer ump ps 208 230 60 1 Ve ET ru Rn ly Tan Capacitor 16 o Duel Fuel Wiring Diagram Thermostat EZ Split Using Field Installed Relay L7 u st Stage Compressor n z 2nd Stage Compressor ee RI Or 2 Reversing Valve poem Do 3A Fossil Fuel L PI Fuse Furnace E Quo c Common e Common 0 14 Brn 15 ia e aa vee Oc R R Blu 17 50113 ii M OE D SEA E OR2. 69 81 254 334 7 13 5 13 7 10 18 24 75 87 260 340 7 14 5 13 3 6 20 26 98 113 293 373 7 14 7 15 8 11 20 26 105 120 300 380 7 15 7 15 4 7 22 28 133 150 315 415 9 15 9 16 11 14 26 32 139 157 325 425 9 15 9 16 7 10 28 34 Water Temp Air Temp Rise F DB Note Cooling performance based on entering air temperatures of 80 F DB 67 F WB Heating performance based on entering air temperature of 70 F DB 26 ENVISION SERIES INSTALLATION MANUAL Unit Operating Parameters Dual Capacity Models First Stage Operation Cooling No Desuperheater Entering Water Water Flow Suction Discharge Temp F GPM Ton Pressure Pressure Superheat Subcooling PSIG PSIG Water Temp Air Temp Drop F DB 3 0 120 135 190 210 9 15 3 10 8 12 17 23 3 0 126 143 230 250 9 18 5 11 9 13 17 23 do tosto mos sw rs se 12 3 0 136 148 300 330 8 14 7 14 8 12 17 23 Heating No Desuperheater Entering Water Water Flow Suction Discharge GPM Ton Pressure Pressure Superheat Subcooling PSIG Water Temp Air Temp Rise F DB Second Stage Operation Cooling No Desuperheater Entering Water Water Flow Suction Discharge Water Temp Air Temp Temp F GPM Ton Pressure Pressure Superheat Subcooling Drop F DB PSIG PSIG n 3 0 115 130 200 220 10 16 3 11 8 12 17 23 3 0 118 133 255 285 9 15 5 12 9 13 17 23 so owe sow su re s2 qro 3 0 123 140 310 340 8 14 7 1
3. G n High Press High Pressure gt 600 PSI Lockout High Pressure gt 600 PSI o RV Blower Hi Yellow Code 5 Open Circuit SW Hot water pump enable switch Q Low Press Comp Low Pressure lt 40 PSI Lockout Low Pressure lt 40 PSI G FAN Aux Heat 1 Code 6 Open Start Circuit TS Thermal limit switch YL air Flow ECM2 RPM lt 100 rpm Lockout ECM2 RPM lt 100 rpm w DHWPump Aux Heat 2 Code 7_ Open Run Circuit Hi Hot water limit sensor R O Status Microprocessor malfunction Not Used SLI Loop Pump 1 AuxHeat 3 Code i DOT SR gui Roa DHW Limit HWL thermistor gt 130 F HWL thermistor gt 130 F SL2 Loop Pump 2 Aux Heat 4 WCL Water Coil Limit Sensor SW e e 010 DHW pump switch off DHW pump switch off Green LED not flashing 97P774 3 3 9 07 16 ENVISION SERIES INSTALLATION MANUAL Wiring Schematics Envision Series Single Speed Split Wiring Schematic 208 230 60 1 Notes 1 24V Accessory relay see SW2 3 for description of operation 2 This Switch allows the unit to down stage with the t stat when OFF and finish on second stage when ON Finish second stage reduces stage changing in recip dual capacity compressors and should be ON for unzoned Dual Cap E Series or Premier 2 speed units 3 Comfort Alert fault output to Premier Control Board 4 SW2 8 must be in the OFF position for pulsed L lockout signal and in the ON position for constant
4. development and reserves the right to change design and specifications without notice 2007 WFI Product Type Size Document Type Part Number Release Date Supercedes Envision Series Geothermal Indoor Split Heat Pumps 2 thru 5 5 Ton Single Speed 2 thru 6 Ton Dual Capacity Installation Manual IM1592 06 07 NA
5. w A E 1 240V L1 1 6 Lo md Fused L2 Fused L2 MV NL e T Cs Auxiliary Heat Relay 6 G F1 10A 240V GA Arn E RE m NO NO _ Ww Heat Relay o NO O yNC INNO ONC _ La F1 10A 240V Tir Auxiliary Heat Relay com COM CRI CR2 Note Field installed DPST dual fuel relay CR3 com CR4 COM Required for dual fuel installation dh Comfort R velo chassis omioritc 85 Alert E O ccH e o Viol a d e cc in i 0 H n Legend 10161 CC i 8 Factory Low voltage wiring BIK 1 I O CCGND e 13 gt Factory Line voltage wiring gt Field low voltage wiring T Field line voltage wiring P1 4 2 drain Optional block Rd E gt DC Voltage PCB traces CEN wi Q Guk comect temini Premier 2 gt LU 12 Microprocessor oD 2 A Wien Logic Control op u Field wire lug DC Voltage oD 5 de 9 gt J y Relay Contacts 2 gt z EA N O N C 1 gt ev Fuse a ani ermistor Ei up Nu hero E Light emitting diode Gi hae Air Flow 16 gt s ight emitting diode Green Settings c OL gt Relay coil sm Suh fg E E 5 Capacitor w bleed resistor In SW On sw On SW3 On 11 gt Tan 11 Comfort Alert Spi E Stoa cd 1 1 2 Speed 1 Speed QO Sitch Condensate overflow M EN mal e 1 Test Norm 5 O p p 4 SE it ve 1 c O 2 Loop Well 2 Normal Finish on 2 Note 2 iie e 9 Orange RV STO i Remote Unit Used 7 ol 3 O 3 Fa Comp HO 3 No RPM RPM E i d Sw
6. drain port Attach the center port of the 3 4 inch FPT tee to the opposite end of the brass nipple Attach the 1 2 inch copper to 3 4 inch NPT adaptor to the side of the tee closest to the unit Install the drain valve on the tee opposite the adaptor Run interconnecting tubing from the tee to DHW water out Cut the cold water IN line going to the water heater Insert the reducing solder tee in line with cold water IN line as shown Run interconnecting copper tubing between the unit DHW water IN and the tee 1 2 inch nominal The recommended maximum distance is 50 feet To prevent air entrapment in the system install a vent coupling at the highest point of the interconnecting lines Insulate all exposed surfaces of both connecting water lines with 3 8 inch wall closed cell insulation Note All plumbing and piping connections must comply with local plumbing codes Desuperheater Startup Oo omm D 12 13 Close the drain valve to the water heater Open the cold water supply to the tank Open a hot water faucet in the building to bleed air from the system Close when full Open the pressure relief valve to bleed any remaining air from the tank then close If so equipped unscrew the indicator plug 1 turn on the motor end of the pump until all air is purged from the pump then tighten the plug Use vent couplings to bleed air from the lines Carefully inspect all plumbing for water leaks and correct as required B
7. not be used Utilizing Existing Coil or Air Handler It is recommended that a new R 410A air handler be installed with an Envision Split considering the long term ben efits of reliability warranty etc versus the short term installation cost savings However the existing air handler may be retained provided the following Coil currently is R 410A rated Coil uses a TXV No capillary or fixed orifice systems should be used Alife expectancy of more than 7 years remaining for the air handler and components ENVISION SERIES INSTALLATION MANUAL Connection to Air Coil Figures 1 and 2 illustrate typical Envision Split installations The table on page 9 shows typical lineset diameters and maximum length Linesets over 60 feet are not recommended If the lineset is kinked or deformed and cannot be reformed the bad section of pipe should be replaced A restricted lineset will affect unit performance As in all R 410A equipment a reversible liquid line filter drier is required to insure all moisture is removed from the system This drier should be replaced whenever breaking into the system for service All linesets should be insulated with a minimum of 1 2 closed cell insula tion All exterior insulation should be painted with UV resistant paint or covering to insure long insulation life Air Handler Installation Air handlers used with dual capacity units must be capable of operating with a minimum of 2 blower speeds Refer to the manu
8. safety reasons do not pres surize the system above 150 psi Purge pressure from line set The system is now ready for evacuating and charging System Evacuation Ensure that the line set and air coil are evacuated before opening service valves to the split unit The line set must be evacuated to at least 200 microns to remove the moisture and air that may still be in the line set and coil Evacuate the sys tem through both service ports to prevent false readings on the gauge because of pressure drop through service ports Initial System Charge Calculation The Envision unit comes with a factory pre charge This volume is not sufficient to run the system Additional refrigerant must be added for the lineset This additional charge added to the factory pre charge of the Envision unit should be esti mated using the following equation Addition to Factory Charge lineset length x oz per ft 20 oz for accumulator The lineset charge should be calculated by multiplying the length times 0 5 oz ft for 3 8 liquid line and 1 0 oz ft for 1 2 liquid line in R 410A systems The suction line will not hold liquid and can be ignored for the calculation This should result in a slightly under charged unit exhibiting low subcooling and high superheat As charge is added the subcooling should rise and the superheat should fall until 8 16 degrees of superheat is reached when the TXV should be metering the system See operating details in the startup sec
9. stage reduces stage changing in recip dual capacity compressors and should be ON for unzoned Dual Cap E Series or Premier 2 speed units 3 Comfort Alert fault output to Premier Control Board 4 SW2 8 must be in the OFF position for pulsed L lockout signal and in the ON position for constant L lockout signal 5 DHW pump only in models with hot water generation option 6 Connection of remote unit that does not have a loop pump for slave operation E N Rn j Tan Capacitor 46 i H H at Duel Fuel Wiring Diagram Thermostat Envision Split P Using Field Installed Relay i i man L1 Qt at lago Compressor a Qu i M Blu B i 2 2nd Stage Compressor An i Gp aisaen Dv DHW o i i Gry 9 Reversing Valve m Qu Do 3A T i Fossil Fuel Fuse Pink i Ye 8 Furnace NOTE 5 5 a E E i common Org 14 Brn 15 Q EXEAT E ETE Bu 7 Pink 13 ds s P c w 240V L1 docas i Fused L2 Fused L2 240V12 240v 12 Q Auxiliary Heat Relay Shut F1 10A 240V 8 o of fo E Q Awita Down Heat Relay No NO NO Q9 NC NO 29 NC EA Ha 7 Aux
10. thermistor loop lt 15 F well lt 30 F Lockout FP thermistor loop lt 15 F well lt 30 F Y2 Compressor Hi Blower Med Code 4 Locked Rotor sw3 DIP package 5 position 8 G lt High Press High Pressure gt 600 PSI Lockout High Pressure gt 600 PSI o RV Blower Hi Yellow Code 5 Open Circuit SWa Hot water pump enable switch Low Press Comp Low Pressure lt 40 PSI Lockout Low Pressure lt 40 PSI G FAN Aux Heat 1 Code 6 Open Start Circuit TS Thermal limit switch Y Air Flow ECM2 RPM lt 100 rpm Lockout ECM2 RPM lt 100 rpm w DHWPump Aux Heat 2 Code E Open am Circuit o Hoi water ia sensor E ode elded Contactor ontactor RIO Status Microprocessor ME Not Used SLI Loop Pump 1 AuxHeat 3 Code 9 Low Voltage SR Start Relay awa DHW Limit HWL thermistor gt 130 F HWL thermistor gt 130 F 512 LoopPump2 Aux Heat 4 WCL Water Coll Limit Sensor 0 0 DHW pump switch off DHW pump switch off Green LED not flashing 97P774 30 3 9 07 17 ENVISION SERIES INSTALLATION MANUAL Microprocessor Control Startup The unit will not operate until all the inputs and safety controls are checked for normal conditions At first power up a four minute delay is employed before the compressor is energized Component Sequencing Delays Components are sequenced and delayed for optimum space conditioning performance Accessory Relay An accessory relay on the control board allows for field connection of solenoid val
11. to a specific superheat however the superheat should be adjusted for the application To adjust the TXV to other superheat settings 1 Remove the seal cap from the bottom of the valve 2 Turn the adjustment screw clockwise to increase superheat and counterclockwise to decrease superheat One complete 360 turn changes the superheat approximately 3 4 F regardless of refrigerant type You may need to allow as much as 30 minutes after the adjustment is made for the system to stabilize 23 ENVISION SERIES INSTALLATION MANUAL 3 Once the proper superheat setting has been achieved replace and tighten the seal cap Warning There are 8 total 360 turns on the superheat adjustment stem from wide open to fully closed When adjusting the superheat stem clockwise superheat increase and the stop is reached any further clockwise turning adjustment will damage the valve Determining Subcooling 1 Measure the temperature of the liquid line on the small refrigerant line liquid line just outside the split cabinet This location will be adequate for measurement in both modes unless a significant temperature drop in the liquid line is anticipated 2 Measure the liquid line pressure by attaching refrigerant gauges to the schrader connection on the liquid line service valve 3 Convert the pressure obtained in Step 2 to the saturation temperature by using the R 410A Pressure Temperature Conversion Chart on page 25 4 Subtract the temperature
12. 5 8 12 17 23 Heating No Desuperheater Entering Water Water Flow Suction Discharge Temp F GPM Ton Pressure Pressure Superheat Subcooling water Temp eae PSIG PSIG 3 0 76 85 285 335 6 12 10 20 3 7 14 18 3 0 105 120 310 375 6 12 6 18 5 9 20 24 3 0 138 152 345 405 7 14 4 15 6 10 22 30 Note Cooling performance based on entering air temperatures of 80 F DB 67 F WB Heating performance based on entering air temperature of 70 F DB 27 ENVISION SERIES INSTALLATION MANUAL Unit Startup Before Powering Unit Check The Following High voltage is correct and matches nameplate Fuses breakers and wire size correct Low voltage wiring complete Piping completed and water system cleaned and flushed Air is purged from closed loop system Isolation valves are open water control valves or loop pumps wired Condensate line open and correctly pitched Transformer switched to 208V if applicable DIP switches are set correctly DHW pump switch is OFF unless piping is completed and air has been purged Blower rotates freely Blower speed correct Air filter cleaner is clean and in position Service access panels are in place Return air temperature is between 50 80 F heating and 60 95 F cooling Check air coil cleanliness to insure optimum performance Clean as needed according to maintenance guidelines To obtain maximum performance the air coil should be cleaned before startup A 10 percent solution of dishw
13. ENVISION Envision Series Geothermal Indoor Split Heat Pumps R 410A Refrigerant 2 6 Ton Single Speed 2 6 Ton Dual Capacity Installation Information Water Piping Connections Desuperheater Connections Electrical Startup Procedures Troubleshooting Preventive Maintenance Da EN PFDA m es PERFORMANCE OA tnr A EI ARI Standard 13256 1 Listo LI Smarter from the Ground Up IM1592 06 07 Envision Split Installation Manual ENVISION SERIES INSTALLATION MANUAL ENVIS Model Nomenclature N D Z 049 A 1 1 A C o Coax Options Model Type C Copper N Envision N Cupronickel Compressor Type Open Option D Dual Capacity A Standard S Single Speed Hot Water Option Cabinet Configuration 0 None Z Indoor Split 1 Hot Water Gerneration with factory installed pump Unit Capacity Voltage 1 208 230 60 1 Vintage A Current Physical Characteristics Model 022 030 036 042 048 060 070 026 038 049 064 072 Compressor 1 each Single Speed Scroll Dual Capacity Scroll Factory Charge R410a oz kg Coax and Water Piping Water Connections Size Swivel in mm HWG Connection Size Swivel in mm Coax amp Piping Water Volume gal I 164 174 212 213 246 251 189 236 250 271 Weight Operating Ib kg 74 79 o6 97 112 114 186 107 113 123 Weight Packaged Ib kg N
14. O 5 Envision E Series or Premier 10 gt Not Used px O 6 6 Inputs Norm 3 Not Used RSS P3 5 E a e i X 0 7 Outputs Norm 8 Pk Switch Hot Water On Off Acc Com s 8 lo 8 Pulse L Constant L NOTE 4 NT A HWL AcNC 2 9 1 Pink Polarized connector ANO hi 2p Yellow eo na O 12 sp Yellow CA Comfort Alert 48 gt Blue s cc Compressor Contactor A LP co Condensate overflow sensor ilala Main Logic PCB e sh Blue CRI DHW pump relay P i CR2 Loop pump relay ww 7 BRE DO HP CR3 PSC Fan Speed Relay 14 Black CR4 PSC Fan Power Relay cS Compressor Solenoid DC Coil F1 and F2 Fuses HE Heater element HP High pressure switch Comfort Alert Status ER1 to ER4 Aux heat stage relays RIO Diagnostic Modes LED Flash Code Description PA ans Low pesi Switch R i Green Sold Module Has Power PB2 ower blocks gt LED Normal Display Mode Current Fault Status Inputs Outputs Outputs2 Red Solid Y1 Present But Compressor Not Running PS Power strip f a RO Field Selection Dips 1 On 6 On 7 On 1 Off 6 On 7 On 36 Off 7 On 6 On 7 Off 6 Off 7 Off Code 1_ Long Run Time RV Reversing Valve coil e R GB Drain Drain pan overflow Lockout Drain pan overflow vi Compressor Lo _ Blower Lo cole 2 EE Pressure Tip pul DE ria pn E RY Water Flow FP thermistor loop lt 15 F well lt 30 F Lockout FP thermistor loop lt 15 F well lt 30 F Y2 Compressor Hi Blower Med Code 4 Locked oe sw3 DIP package 5 position E
15. Secondary 2 Out Emerg LED T Stat Signal Y O 5 R 3 5 5 EJE 3 E o 5 O O 5 o 5 O off O O O Off Y ff ff ff ff n On Off ff Off Off n On Off ff Off Off n On Off ff Off On i WwW ff Off Off n On Off ff Off Off n On Off n Off Off n On Off n On Off ff Off On WwW o o n n n n 1 n n n n 1 lt 20 DIP Switch Settings ENVISION SERIES INSTALLATION MANUAL DIP SWITCH NUMBER DESCRIPTION OFF POSITION ON POSITION Service Test Mode Allows control of NORM or TEST opera tional modes Test mode accelerates most timing functions 16 times to allow faster troubleshooting Test mode also allows view ing the CURRENT status of the fault inputs on the LED display Freeze Sensing Setting Allows field selection of freeze thermistor fault sensing tempera tures for well water 30 F or antifreeze protected 15 F earth loops Accessory Relay Allows field selection of the accessory relay to operate with the compressor or fan Input Diagnostics Allows viewing the inputs from the thermo stat to the control board such as Y1 Y2 O W SL1 In on the LED display Output Diagnostics Allows viewing the outputs from the control board such as the compressor reversing valve blower hot water pump and loop pump on the LED display Thermostat Selection Configures the control for a pulsed lockout signal ComforTalk and FaultFlash thermostats or co
16. adequate flow velocity in the loop to purge air and dirt particles from the loop itself Antifreeze solution is used in most areas to prevent freezing Flush the System adequately to remove as much air as possible then pressurize the loop to a static pressure of 40 50 PSI summer or 50 75 PSI winter This is normally adequate for good system operation Loop static pressure will fluctuate with the seasons Pressures will be higher in the winter months than during the cooling season This fluctuation is normal and should be considered when initially charging the system After pressurization be sure to remove the plug in the end of the loop pump motor s if applicable to allow trapped air to be discharged and to ensure that the motor housing has been flooded Ensure that the loop pumps provide adequate flow through the unit s by checking the pressure drop across the heat exchanger and comparing it to the unit capacity data in the specification cata log Usually 2 5 to 3 GPM of flow per ton of cooling capacity is recommended in earth loop applications Thermostat Wire From Air Handler Insulated Disconnect Flow Center Electrical Supply N iosa Absorbing Pad or Air Pad Multiple Units on One Flow Center When two units are connected to one loop pumping system pump control is automatically achieved by connecting the SL terminals on connector P2 in both units with 2 wire thermostat wire These ter
17. asher detergent and water is recommended for both sides of coil a thorough water rinse should follow Startup Steps Notes Complete the Equipment Start Up Commissioning Check Sheet during this procedure Refer to thermostat operating instructions and complete the startup procedure aRwWN gt NO 10 11 12 13 14 Initiate a control signal to energize the blower motor Check blower operation Initiate a control signal to place the unit in the cooling mode Cooling setpoint must be set below room temperature First stage cooling will energize after a time delay Be sure that the compressor and water control valve or loop pump s are activated Verify that the water flow rate is correct by measuring the pressure drop through the heat exchanger using the P T plugs and comparing to unit capacity data in specification catalog Check the temperature of both the supply and discharge water see page 26 27 Check for an air temperature drop of 15 F to 25 F across the air coil depending on the fan speed and entering water temperature Decrease the cooling set point several degrees and verify high speed blower operation Adjust the cooling setpoint above the room temperature and verify that the compressor and water valve or loop pumps deactivate Initiate a control signal to place the unit in the heating mode Heating set point must be set above room temperature First stage heating will energize after a time delay Check the temper
18. ature of both the supply and discharge water see page 26 27 Check for an air temperature rise of 20 F to 35 F across the air coil depending on the fan speed and entering water temperature If auxiliary electric heaters are installed increase the heating setpoint until the electric heat banks are sequenced on All stages of the auxiliary heater should be sequenced on when the thermostat is in the Emergency Heat mode Check amperage of each element 28 ENVISION SERIES INSTALLATION MANUAL T 15 Adjust the heating setpoint below room temperature and verify that the compressor and water valve or loop pumps deactivate 16 During all testing check for excessive vibration noise or water leaks Correct or repair as required 17 Set system to desired normal operating mode and set temperature to maintain desired comfort level 18 Instruct the owner operator in the proper operation of the thermostat and system maintenance Notes Be certain to fill out and forward all warranty registration papers Final Evaluation After the initial check of superheat subcooling values in the heating mode shut off the unit and allow it to sit 3 to 5 min utes until pressures equalize Restart the unit in the cooling mode and check the values against those in tables on pages 26 and 27 If the unit performs satisfactorily charging is complete If the unit does not perform to specifications the charge may need to be readjusted until the values are close Add
19. compressor will be activated 5 seconds after receiving a Y2 input as long as the minimum first stage compressor run time of 1 minute has expired The ECM blower changes from medium to high speed 15 seconds after the Y2 input The Comfort Alert will delay the second stage compressor until 5 seconds after it receives a Y2 from the board Heat 3rd Stage Y1 Y2 W Single Speed Units The first stage of resistance heat is energized 10 seconds after W input and with continuous 3rd stage demand the additional stages of resistance heat engage sequentially every 5 minutes Heat 3rd Stage Y1 Y2 W Dual Capacity Units The hot water pump is de energized which directs all heat to satisfy the thermostat The 1st stage of resistance heat is energized 10 seconds after W input and with continuous 3rd stage demand the additional stages of resistance heat engage sequentially every 5 minutes Emergency Heat W only The fan is started on high speed and the first stage of resistance heat is energized 10 seconds after the W input Continuing demand will engage the additional stages of resistance heat sequentially every 2 minutes 18 ENVISION SERIES INSTALLATION MANUAL Microprocessor Control cont Cooling Operation In all cooling operations the reversing valve directly tracks the O input Thus anytime the O input is present the reversing valve will be energized Cool 1st Stage Y1 0 The blower motor and hot water p
20. ear under normal operating conditions and if dirty brush or vacuum clean Care must be taken not to damage the aluminum fins while cleaning A CAUTION Fin edges are sharp Replacement Procedures Obtaining Parts When ordering service or replacement parts refer to the model number and serial number of the unit as stamped on the serial plate attached to the unit If replacement parts are required mention the date of installation of the unit and the date of failure along with an explanation of the malfunctions and a description of the replacement parts required In Warranty Material Return Material may not be returned except by permission of authorized warranty personnel Contact your local distributor for warranty return authorization and assistance 33 ENVISION SERIES INSTALLATION MANUAL Physical Dimensions UJ ON A il le LIB I E hd i D ENVISION NZ SPLIT DIMENSIONAL DATA Nzoom VALUE DIMENSION VALUE DESCRIPTION A A E E 11 80 34 ENVISION SERIES INSTALLATION MANUAL Installation Notes 35 Smarter Ete ass the Ground Up Manufactured by WaterFurnace International Inc 9000 Conservation Way Fort Wayne IN 46809 WFI has a policy of continuous product research and
21. ector has a rubber gasket seal similar to a rubber hose gasket which when mated to the flush end of any 1 inch threaded pipe provides a leak free seal without the need for thread sealing tape or compound Check to ensure that the rubber seal is in the swivel connector prior to attempting any connection The rubber seals are shipped attached to the waterline To make the connec tion to a ground loop system mate the brass connector supplied in CK4L connector kit against the rubber gasket in the swivel connector and thread the female locking ring onto the pipe threads while maintaining the brass connector in the desired direction Tighten the connectors by hand then gen tly snug the fitting with pliers to provide a leak proof joint When connecting to an open loop ground water system thread the 1 inch MPT fitting SCH80 PVC or copper into the swivel connector and tighten in the same manner as noted above The open and closed loop piping system should include pres sure temperature taps for serviceability Never use flexible hoses smaller than 1 inch inside diameter on the unit Limit hose length to 10 feet per connection Check carefully for water leaks Figure 3 Swivel Connections Residential Units Stainless Steel Snap Ring Locking Ring Gasket Support 7 Sleeve 4 E Gasket Material ENVISION SERIES INSTALLATION MANUAL A
22. efore restoring electrical supply to the water heater adjust the temperature setting on the tank e On tanks with both upper and lower elements the lower element should be turned down to the lowest setting approximately 100 F The upper element should be adjusted to 120 F to 130 F Depending upon the specific needs of the customer you may want to adjust the upper element differently e On tanks with a single element lower the thermostat setting to 120 F After the thermostat s is adjusted replace the access cover and restore electrical supply to the water heater Make sure that any valves in the desuperheater water circulating circuit are open Turn on the unit to first stage heating The DHW pump should be running When the pump is first started open the inspection port 1 turn if equipped until water dribbles out then replace Allow the pump to run for at least five minutes to ensure that water has filled the circulator properly Be sure the switch for the DHW pump SW4 is ON The DHW OFF LED on the unit should not be illuminated The temperature difference between the water entering and leaving the desuperheater should be 5 F to 15 F The water flow should be approximately 0 4 GPM per ton of nominal cooling Allow the unit to heat water for 15 to 20 minutes to be sure operation is normal CAUTION Never operate the DHW circulating pump while dry If the unit is placed in operation before the desuperheater piping
23. er In From W ell Vibration Absorbing Pad or Air Pad Figure 5 Open Loop Solenoid Valve Connection Option Figure 9b Open Loop Solenoid Valve Connection Option Typical quick operating external 24V water solenoid valve Typical slow operating external 24V water solenoid valve type PPV100 or BPV100 wiring type VM wiring P1 Violet 2 HO CC R OA ONNVO 1 i VM valve Acc Com 1 BI 1 O CC GND Violet 3 AccNC 2 44 e P3 Comfort Alert Y2 CCHI EV Acc NO 3 Wnt 4 O Logic Board Solenoid Valve 10 ENVISION SERIES INSTALLATION MANUAL Open Loop Well Water Systems continued Solenoid Wiring Water control valves draw their power directly from a unit s 24V transformer and can overload and possibly burn out the transformer Check total VA draw of the water valve and ensure that it is under 15 VA Water Quality In ground water situations where scaling could be heavy or where biological growth such as iron bacteria will be pres ent a closed loop system is recommended The heat exchanger coils in ground water systems may over a period of time lose heat exchange capabilities due to a buildup of mineral deposits inside These can be cleaned but only by a qualified service mechanic as special solutions and pumping equipment are required Desuperheater coils can likewise become scaled and possibly plugged In areas w
24. facturer s instructions for the blower coil unit for details on installing the air handling portion of the system All blower coil units air coils must be installed as specified by the manufacturer s installations instructions However the following rec ommendations should be considered to minimize noise and service problems An air filter must always be installed upstream of the air coil on the return air side of the air handler of furnace If there is limited access to the filter rack for normal maintenance it is suggested that a return air filter grille be installed Be sure that the return duct is properly installed and free of leaks to prevent dirt and debris from bypassing the filter and plugging the air Coil Ensure that the line set size is appropriate to the capacity of the unit refer to page 9 Line sets should be routed as di rectly as possible avoiding unnecessary bends or turns All wall penetrations should be sealed properly Line set should not come into direct contact with water pipes floor joists wall studs duct work floors walls and brick Line set should not be suspended from joists or studs with a rigid wire or strap which comes into direct contact with the tubing Wide hanger strips which conform to the shape of the tubing are recommended Isolate hanger straps from line set insulation by using metal sleeves bent to conform to the shape of insulation Line set insulation should be pliable and should completely surround the refr
25. g filters All other operations should be performed by trained service personnel When working on heating and air conditioning equipment observe precautions in the literature tags and labels attached to the unit and other safety precautions that may apply such as the following safety measures e Follow all safety codes e Wear safety glasses and work gloves e Use a quenching cloth for brazing operations Have a fire extinguisher available for all brazing operations Moving and Storage Move units in the normal up orientation Units may be moved and stored per the information on the packaging Do not stack more than three units in total height Do not attempt to move units while stacked When the equipment is received all items should be carefully checked against the bill of lading to be sure all crates and cartons have been received Examine units for shipping damage removing the units from the packaging if necessary Units in question should also be internally inspected If any damage is noted the carrier should make the proper notation on the delivery receipt acknowledging the damage Unit Location Locate the unit in an indoor area that allows for easy removal of the access panels Location should have enough space for service personnel to perform maintenance or repair Provide sufficient room to make water electrical and refrigerant line connections Any access panel screws that would be difficult to remove after the unit is ins
26. ich High pressure Without C range uon O 4 O 4 Dehum Norm 4 Electric Heat Normal OO Swich Low pressure i PRA NOTE 1 O5 5 NoHtg3 Htg3 O 5 Envision E Series or Premier 10 gt Not Used al 3 O fe 6 inus nom 3D 40105060 7 7 Outputs Norm a gt bak ee Switch Hot Water On Off Acc Com 1 8 O 8 Pulse L Constant L NOTE 4 i Ii HWL AcNC 2 4 O 9 1 gt Pink Polarized connector e 10 12 Yellow Acc NO Oo T 2 T WCL e h 5 Yellow CA Comfort Alert cC Compressor Contactor 13 Blue O a LP co Condensate overflow sensor Tala Main Logic PCB e o Blue CRI DHW pump relay P4 a CR2 Loop pump relay Terr i gt Bio STE HP CR3 PSC Fan Speed Relay 14 gt Black CR4 PSC Fan Power Relay cS Compressor Solenoid DC Coil F1 and F2 Fuses HE Heater element HP High pressure switch Comfort Alert Status ER1to ER4 Aux heat stage relays RIO Diagnostic Modes LED Fash Code Description LP Low pressure switch PB1 PB2 Power blocks RY 3 Green Solid Module Has Power gt 0 AA LED Normal Display Mode Current Fault Status Inputs Outputs Outputs2 Red Solid 1 Present But Compressor Not Running PS Power strip i 9 RIO Field Selection Dips 1 On 6 On 7 On 1 Off 6 On 7 On 6 Off 7 On 6 On 7 Off 6 Off 7 Off Code 1_ Long Run Time _ he peer vere ci sa R O Drain Drain pan overflow Lockout Drain pan overflow vi Compressor Lo _ Blower Lo oe Z E Tip SW DIP need OR uy RIO Water Flow FP
27. igerant line Notes Improper installation of equipment may result in undesirable noise levels in the living areas Return Duct o Drain Figure 1 Typical Split System Application with Remote Blower Coil Wire To Supply Thermostat Thermostat Wire From Air Handler Disconnect Insulated Suction Line Remote Air Handler Maximum Recommended Distance is 50 Between Units Condensate Drain must be trapped P T Plugs Vibration Absorbing Pad or Air Pad ENVISION SERIES INSTALLATION MANUAL Dual Fuel Systems Envision units can be connected to fossil fuel furnaces that include an A coil or slab coil Dual fuel installations utilize the Envision heat pump for heating until the point that auxiliary heat is called for on the thermostat At that point the furnace will be enabled and the heat pump will be disabled The Envision heat pump provides air conditioning through the furnace s refrigerant coils Refer to the furnace manufacturer s installation manual for the furnace installation wiring and coil insertion A WaterFurnace Dual Fuel thermostat a field installed DPST relay or dual capacity auxiliary heat relay is required See Figure 2 for typical Dual Fuel application In add on Envision Split applications the coil should be located in the supply side of the furnace to avoid condensation damage to the furnace heat exchanger A high temperature limit should be installed upst
28. iliary Heat Relay COM com e e CR1 CR2 Note Field installed DPST dual fuel relay CR3 COM CR4 COM Required for dual fuel installation BE Comfort R Yel 6 chassis c 8K 5 Y2 C Alert yL wwa gt R ccHi 9 O veni 1 Ll LC vioet 2 O ce i Legend bi e 8 Factory Low voltage wiring BIK 1 CC GND e 13 gt Factory Line voltage wiring J Field low voltage wiring 7 Field line voltage wiring La 4 gt SIME regni Optional block R fa P DC Voltage PCB traces c hs A e Internal junction 14 gt O Quick connect terminal vi F3 Premier 2 gt LLI 12 v Fs Microprocessor ob 2 A Wire nut w Ps5 Logic Control A Li Field wire lug la o Fe DC Voltage ob 5 MS ud G 1 9 gt i Relay Contacts to Fe 2 gt Z A NO N C Fuse 1 Ns fu P2 3 Shut 11 gt eo Thermistor Sass ECM2 E pon T Air Flow r1 Tei Light emitting diode Green 29 NOTES e Settings Ci o C 3 gt Relay coil Sum dp Sutin ima E NOTES Li Capactor w teed resistor f SW On SW2 On SW3 On 1 Tan L Comfort Alert o sut out Li SL1 Out fm 5 00 ol 01 Test Norm O 1 2Speed 1 Speed 4 gt Switch Condensate overflow Optional Nt 6 O 2 02 Loop Well O 2 Normal Finishon2m Note 2 amp 9 Orenge Ro aro Remote Unit Used 7 IE O 3Fa Comp HO 3 No RPM RPM 2 Switch High pressure Without O 4 4 Dehum Nom C 4 Electric Heat Normal Orange S ih Lau pressus Loop Pump NOTE 1 o 5 5 NoHtg3 Htg3
29. in Step 1 from the temperature in Step 3 The difference will be the subcooling value for that unit Refer to the tables on pages 26 27 for subcooling ranges at specific enter water conditions 24 ENVISION SERIES INSTALLATION MANUAL Pressure Temperature Coversion Chart for R 410A PRESSURE TEMP PRESSURE TEMP PRESSURE TEMP PRESSURE PRESSURE TEMP PSIG F PSIG F PSIG F PSIG PSIG F 60 8 5 i 62 9 9 63 5 96 3 64 2 96 8 64 8 97 2 65 5 97 7 66 1 98 1 66 8 98 6 67 4 99 0 68 0 99 5 68 7 99 9 69 3 69 9 70 5 71 1 71 7 72 3 72 9 73 5 74 1 74 7 75 3 75 8 76 4 77 0 77 5 78 1 78 7 79 2 79 8 80 3 80 9 81 4 81 9 82 5 83 0 83 5 84 1 84 6 85 1 85 6 86 1 86 6 87 1 87 7 88 2 88 7 89 2 89 6 25 ENVISION SERIES INSTALLATION MANUAL Unit Operating Parameters Single Speed Models Cooling No Desuperheater Entering Water Water Flow Suction Discharge GPM Ton Pressure Pressure Superheat Subcooling PSIG PSIG 120 142 215 240 7 15 7 14 18 22 18 22 115 138 190 225 10 18 4 11 8 10 18 22 125 148 290 315 8 14 6 11 18 22 18 22 123 146 255 290 9 15 5 10 8 10 18 22 134 157 340 380 8 14 6 13 18 22 16 20 130 155 310 350 9 15 5 12 8 10 16 20 Water Temp Air Temp Drop F DB Heating No Desuperheater Entering Water Water Flow Suction Discharge Temp F GPM Ton Pressure Pressure Superheat Subcooling PSIG PSIG
30. ing refrigerant will increase subcooling Recovering some of the refrig erant will decrease subcooling and increase superheat If the superheat subcooling values are still not close to the specifica tions in tables on pages 26 and 27 analyze refrigerant circuit operation 29 ENVISION SERIES INSTALLATION MANUAL Unit Startup Troubleshooting Heating Cycle Analysis Measure suction temperature here at TXV bulb in heating modes Measure suction temperature here at TXV bulb in Suct PSI ___ cooling modes Suct sat temp Suct temp Super heat Lineset gt length Suction Air Comp Coil Bi flow CIgTXV filter drier Discharge Discharge PSI Measure liquid line Disch sat temp temperature and Liquid temp COOLING TXV ACTIVE pressure here in Sub cooling RIGHT TO LEFT both heating and cooling modes HEATING TXV ACTIVE LEFT TO RIGHT Heat of Extraction Rejection GPM x 500 485 for water antifreeze x AT Note DO NOT hook up pressure gauges unless there appears to be a performance problem Measure suction temperature Cooling Cycle Analysis here at TXV bulb in heating modes Measure suction temperature here at TXV bulb in Suct PSI cooling modes Suct sat temp Suct temp Super heat A Lineset gt length Suction Air Comp Coil heater A Discharge PSI Bir w Discharge ClgTXV filter drier COOLING TXV ACTIVE RIGHT TO LEFT Measure liquid line temperature and pressure he
31. ir Handler ult Signal Fi Gace rac ea i Du sg 0 c c c c Common Q a eee Qe intra R R R R 24 VAC 24VAC Me A PoP A eee eee d d Ad ee rer AE EM EM o Q i w w A A DA 0 Fo O QAM 3 AR Auxiliary Heat Relay g e Fan e Fi O EE AAA E ie QD rh Auxiliary Down O Tiara car ce Y w Heat Relay 0 77 Auxiliary Heat Relay Air Handler transformer must be at least 75 VA Note Field installed DPST dual fuel relay Required for dual fuel installation 7 7 chassis 15 ENVISION SERIES INSTALLATION MANUAL Wiring Schematics Envision Series Dual Capacity Split Wiring Schematic 208 230 60 1 Ext Pump 1 2 hp Total 208 230 60 1 Uni Power 208 230 60 1 Red 1 Black Comfort Alert SOL 1 cc cs Notes 1 24V Accessory relay see SW2 3 for description of operation 2 This Switch allows the unit to down stage with the t stat when OFF and finish on second stage when ON Finish second
32. ir Handler Coil Data Envision Matching Air Coil Surface Tube CES Model UN Area sq ft EE Notes Variable speed air handler required for all dual capacity units Line Set Sizes Unit Air Factory Size Handler Suction iqui Suction iqui Suction iqui Charge oz NAH036 5 8 OD 3 8 OD 5 8 OD 3 8 OD 3 4 OD 3 8 OD NAH036 5 8 OD 3 8 OD 3 4 OD 3 8 OD 3 4 OD 3 8 OD NAH036 5 8 OD 3 8 OD 3 4 OD 3 8 OD 3 4 OD 1 2 OD NAHO060 3 4 OD 3 8 OD 3 4 OD 3 e OD 7 8 OD 1 2 OD NAHO060 3 4 OD 3 8 OD 7 8 OD 3 8 OD 7 8 OD 1 2 OD NAHO60 7 8 OD 1 2 OD 7 8 OD 1 2 OD 1 1 8 OD 1 2 OD NAHO60 7 8 OD 1 2 OD 7 8 OD 1 2 OD 1 1 8 OD 1 2 OD NAH036 5 8 OD 3 8 OD 3 4 OD 3 8 OD 3 4 OD 1 2 OD NAH036 5 8 OD 3 8 OD 3 4 OD 3 8 OD 3 4 OD 1 2 OD NAHO60 3 4 OD 3 8 OD 7 8 OD 3 8 OD 7 8 OD 1 2 OD NAHO060 7 8 OD 1 2 OD 7 8 OD 1 2 OD 1 1 8 OD 1 2 OD NAHO060 7 8 OD 1 2 OD 7 8 OD 1 2 OD 1 1 8 OD 1 2 OD Notes Lineset charge for R410A is 0 50 oz per ft for 3 8 and 1 0 oz per ft for 1 2 tube Rev 6 8 07 Initial Total System Charge Factory Envision Split charge lineset charge 20 oz then adjust charge by subcooling and superheat measurements ENVISION SERIES INSTALLATION MANUAL Open Loop Well Water Systems Typical open loop piping is shown below Always maintain water pressure in the heat exchanger by placing water con trol valves at the outlet of the unit to prevent mineral precipitatio
33. is connected be sure that the pump switch is set to the OFF position 14 ENVISION SERIES INSTALLATION MANUAL Electrical General Be sure the available power is the same voltage and phase as that shown on the unit serial plate Line and low voltage wiring must be done in accordance with local codes or the National Electric Code whichever is applicable See unit electri cal data for fuse or cicuit breaker sizing information Electrical Data Rated Voltage Voltage Min Max 7827 2082807601 TESS MO 99 48 7030 208 230 60 1 1971253 _036_ 208 230 60 1 _197 253 _042_ 208 230 60 1 _197 253 1971255 _060__ 208 230 60 1 _197 253 208 230 60 1 197 253 X 5 4 026 208 230 60 1 197253 _038__ 208 230 60 1 _197 253 049 208 23016071 1971253 064 208 230 60 1 1977253 40 0 256 118 208 230 60 1 197 253 Notes Rev 02 20 07 Rated Voltage of 208 230 60 1 HACR circuit breaker in USA only Min Max Voltage of 197 253 All fuses Class RK 5 Thermostat Wiring Figure 12a Thermostat Wiring Single and Dual Figure 12b Thermostat Wiring for Dual Fuel Applications Capacity Units Thermostat Envision Split Thermostat Envision Split vi YI sca NE RA Qu Q Ast stage Compressor ret Dn di M 2nd Stage C iris STE Qu 22555 Or 9 Reversing Valve Q eee Qo o i 5 Fossil Fuel L A
34. ith extremely hard water the owner should be informed that the heat exchanger may require occasional flushing seating Calcium and Magnesium Carbonate Total Hardness less than 350 ppm Total Hardness less than 350 ppm Less than 5 ppm Hydrogen Sulfide rotten egg smell appears at 0 5 PPM 1090 ppm Less than 125 ppm Less than 125 ppm Less than 5 ppm Less than 5 ppm Less than 20 ppm UT Less than 50 ppm Less than 2 ppm Less than 5 ppm Loss than 5 ppm Less than 5 ppm Less than 5 ppm Total Dissolved Solids TDS Less than 1000 ppm 1000 1500 ppm rd Iron Fe Ferrous None None Iron Fouling Bacterial Iron Potential Biological Growth Less than 1 ppm Above this level Less than 1 ppm Above this level Iron Oxide We deposition will occur deposition will occur Suspended Solids Less than 10 ppm and filtered for max Less than 10 ppm and filtered for max Erosion of 600 micron size of 600 micron size Threshold Velocity Fresh Water 5 8 ft sec 8 12 ft sec Note Grains PPM divided by 17 mg l is equivalent to PPM 11 ENVISION SERIES INSTALLATION MANUAL Closed Loop Ground Source Systems Note For closed loop systems with antifreeze protection set SW2 2 to the loop position see table on page 21 Once piping is completed between the unit pumps and the ground loop see figure below final purging and charging of the loop is required A flush cart or a 1 5 HP pump minimum is needed to achieve
35. minals are polarity dependant see Figure 8 The loop pump s may be powered from either unit whichever is more convenient If either unit calls the loop pump s will automatically start The use of two units on one flow center is generally limited to a total of 20 GPM capacity Figure 8 Primary Secondary Hook up Envision to Envision Microprocessor Units Dual Capacity Envision Unit 1 Shut CIC Down With pump lt t gt wired to Unit 1 d With pump q wired to Unit 2 Shut Down C C Envision Unit 22 Dual Capacity Envision to Envision Microprocessor Units Single Speed Envision Unit 1 Shut SL1 SL1 Down cic In Out gt t With pump wired to Unit 1 as TN With pump wired to Unit 2 La Shut SLI SLi down in out Envision Unit 2 Single Speed 12 Figure 7 Typical Split System Application Closed Loop Earth Coupled To Loop 1 L GeoLink a Flow Center Le Lineset To Air Handler DHW Out DHW In Rubber Hose Connector Kit CK4L or CK4S P T Plugs Envision to Electromechanical Units Envision Unit 1 Shut clc SL1 SL1 Down In Out 24vAC To Electromechanical Unit ENVISION SERIES INSTALLATION MANUAL Desuperheater Connections To maximize the benefits of the desuperheater a mini
36. mum 50 gallon water heater is recommended For higher demand applications use an 80 gallon water heater or two 50 gallon water heaters connected in a series as shown below Electric water heaters are recommended Make sure all local electrical and plumbing codes are followed when installing a desuperheater Residential units with desuperheaters contain an internal circulator and fittings Note Under certain conditions Envision dual capacity units operate with very low refrigerant discharge temperatures producing little or no water heating capability This scenario occurs when the unit is operating with cold entering source water loop or well Allowing the desuperheater pump to operate during these conditions actually removes heat from the DHW circulating through the unit To overcome this Envision unit microprocessors have been programmed to disengage the desuperheater pump during such conditions During low capacity cooling operation the pump will operate only if the DHW temperature entering the unit is less than the liquid line temperature plus 35 F During high capacity cooling operation the pump will operate only if the DHW temperature is less than the liquid line temperature plus 60 F Using a preheat tank as shown in Figure 11 will maximize desuperheater capabilities Water Tank Preparation To install a unit with desuperheater follow these installation guidelines 1 Turn off the power to the water heater Attach a water hose to the
37. n Use a closed bladder type expansion tank to minimize mineral formation due to air exposure Ensure proper water flow through the unit by checking pressure drop across the heat exchanger and comparing it to the figures in the unit capacity data tables in the specification catalog Usually 1 5 2 GPM of flow per ton of cooling capacity is recommended in open loop applications In dual capacity units stage 1 is 7096 of the total tonnage Therefore due to only minor differences in flow rate from low to high only one solenoid valve should be used The valve should be sized for full flow Discharge water from the unit is not contaminated in any manner and can be disposed of in various ways depending on local building codes i e recharge well storm sewer Figure 4 Typical Split System Application Open Loop Well Water drain field adjacent stream or pond etc Most local codes forbid the use of sanitary sewer i pan a for disposal Consult your local gd Rutier Elesker stia I Pressure Tank building and zoning depart Lineset ments to ensure compliance in To Air Handler your area Water Solenoid Control Valve Notes For open loop ground Boiler Drains for water systems or sytems that EU Flow do not contain an antifreeze Regulator solution set SW2 Switch 2 ot Water Out to the WELL position Refer to the table on page 21 Slow opening closing solenoid valves type VM are recommended to eliminate water hammer Wat
38. ntinuous 5 VAC lockout signal Single or Dual Capacity Operation NOT USED NOT USED Loop Protection 15 F Diagnostic Inputs viewed at LEDs Diagnostic Outputs viewed at LEDs Pulsed L signal Dual Cap Well Protection 30 F Normal Display viewed at LEDs Normal Display viewed at LEDs Continuous L signal 1 Speed Zoned Finish on Second Stage This switch allows the unit to down stage with the thermostat when off and finish with second stage when on Finish on second stage reduces stage changing in reciprocating dual capacity compressors Normal All other systems Finish on 2nd Unzoned Dual Capacity E Series or Premier 2 speed ECM Fan Monitoring Set for No PRM on split systems RPM NOT USED N A On dual capacity units this switch allows stage change on the fly when off and 1 minute delay when on A delay is required on all reciprocating dual capacity units 21 Envision E Series or Premier ENVISION SERIES INSTALLATION MANUAL Refrigeration The Envision series comes with a holding charge The charge must be adjusted in the field based on performance Refrigeration piping on the split consists of installing a brazed copper line set between the blower coil unit and the unit s split compressor section To select the proper tube diameters for the installation refer to the table on page 9 Line sets over 60 feet long are not recommended because
39. occur Comfort Alert lockouts cannot be reset at the thermostat All other lockout modes can be reset at the thermostat after turning the unit off then on which restores normal operation but keeps the unit lockout LED illuminated Interruption of power to the unit will reset a lockout without a waiting period and clear all lockout LEDs High Pressure This lockout mode occurs when the normally closed safety Switch is opened momentarily set at 600 PSI Low Pressure This lockout mode occurs when the normally closed low pressure switch is opened for 30 continuous seconds set at 40 PSI A low pressure fault may also be indicated when a Comfort Alert lockout has occurred Freeze Sensing Water Flow This lockout mode occurs when the freeze thermistor temperature is at or below the selected freeze point well 30 F or loop 15 F for 30 continuous seconds 19 ENVISION SERIES INSTALLATION MANUAL Operation Logic Data OPERATION LOGIC HEATING COOLING SL1 IN SL2 IN 5761 5762 STG3 5761 STG2 ON ON SINGLE SPEED UNITS On onc cc nec i se dl p p s to Compressor Rev Valve O Loop Pump Ojo 3 O 5 lt O Is O RES Of on Of Secondary 1 Out Oo O Emerg LED T Stat Signal DUAL CAPACITY UNITS Compesserto TO Compressed O Revae O O O O O o o lt 35 35 5 O 3 O O O O O O O O O O O O O O O OJO 3 O 5 O 5 Loop Pump Secondary 1 Out
40. of oil return and pressure drop problems The suction line must always be insu lated Handle and route the line sets carefully to avoid kinking or bending the tubes If the line set is kinked or distorted and it cannot be formed back into its original shape the bad portion of the pipe should be replaced A restricted line set will affect the performance of the system Connection to Air Coil Figures 1 and 2 illustrate typical Envision Split installations The table on page 9 shows typical lineset diameters and maximum length As in all R 410A equipment a reversible liquid line filter drier is required to insure all moisture is removed from the system This drier should be replaced whenever breaking into the system for service All linesets should be insulated with a minimum of 1 2 closed cell insulation All insulation should be painted with UV resistant paint or covering to insure long insulation life Fasten the copper line set to the blower coil unit as instructed by the coil installation instructions shown in Figure 14 Nitrogen should be bled through the system at 2 to 3 PSI to prevent oxidation inside the refrigerant tubing Use a low silver phos copper braze alloy on all brazed connections Braze line set to the service valve stubs on the Figure 13 Typical Split System Refrigerant Line Connections inside front of the split cabinet as shown in Figure 13 Nitrogen should be bled through the system at 2 to 3 PSI to prevent oxidation contamina
41. otes Rev 6 7 07 All units have TXV expansion devices and 1 2 12 2mm amp 3 4 19 1mm electrical knockouts ENVISION SERIES INSTALLATION MANUAL Table of Contents Model Nomenclature 2 Physical Characteristics 2 General Installation Information 4 8 Air Handler Coil Data 9 Line Set Sizes 9 Open Loop Well Water Systems 10 11 Closed Loop Ground Source Systems 12 Desuperheater 13 14 Electical Data 14 Thermostat Wiring 15 Wiring Schematics 16 17 Microprocessor Control Features and Operation 18 19 Operation Logic Data 20 DIP Switch Settings 21 Refrigeration 22 25 Unit Operating Parameters 26 27 Unit Startup 28 30 Pressure Drop amp Recommended Flow Rates 31 Troubleshooting 32 Preventive Maintenance 33 Replacement Procedures 33 Physical Dimensions 34 ENVISION SERIES INSTALLATION MANUAL General Installation Information Safety Considerations WARNING Before performing service or maintenance operations on a system turn off main power switches A to the indoor unit If applicable turn off the accessory heater power switch Electrical shock could cause personal injury Installing and servicing heating and air conditioning equipment can be hazardous due to system pressure and electri cal components Only trained and qualified service personnel should install repair or service heating and air conditioning equipment Untrained personnel can perform the basic maintenance functions of cleaning coils and cleaning and replacin
42. r High Limit Domestic Hot Water Option This mode occurs when the hot water input temperature is at or above 130 F for 30 continuous seconds The DHW limit status LED on the unit illuminates and the hot water pump de energizes Hot water pump operations resume on the next compressor cycle or after 15 minutes of continuous compressor operation during the current thermostat demand cycle Hot Water Justification Since compressor hot gas temperature is dependant on loop temperature in cooling mode loop temperatures may be too low to allow proper heating of water The control will monitor water and refrigerant temperatures to determine if conditions are satisfactory for heating water The DHW limit status LED on the unit illuminates when conditions are not favorable for heating water Heating Operation Heat 1st Stage Y1 The fan motor is started on low speed immediately PSC ON the loop pump is energized 5 seconds after the Y 1 input is received and the compressor is energized on low capacity 10 seconds after the Y 1 input The fan is switched to medium speed 15 seconds after Y 1 input ECM only The hot water pump is cycled 30 seconds after the Y 1 input Heat 2nd Stage Y1 Y2 Single Speed Units The hot water pump is de energized which directs all heat to satisfying the thermostat and the fan changes to high speed 15 seconds after the Y2 input ECM only Heat 2nd Stage Y1 Y2 Dual Capacity Units The second stage
43. ranch ducts Ducts in unconditioned areas should be wrapped with a minimum of 1 inch duct insulation Application of the unit to uninsulated ductwork in an unconditioned space is not recommended as the unit s performance will be adversely affected If the air handler is connected to existing ductwork a previous check should have been made to assure that the duct system has the capacity to handle the air required for the unit application If ducting is too ENVISION SERIES INSTALLATION MANUAL General Installation Information continued small as in replacement of heating only systems larger ductwork should be installed All existing ductwork should be checked for leaks and repairs made accordingly The duct systems and diffusers should be sized to handle the design airflow quietly If air noise or excessive airflow is a problem the blower speed can be changed to a lower speed to reduce airflow This will reduce the performance of the unit slightly in heating however it will increase the temperature rise across the air coil Airflow must still meet minimum requirements Equipment Selection The following guidelines should be used when mating an Envision Split to an air handler coil e Select R 410A components only Select 12 SEER or higher air handler coil e Match the air handler to the air handler coil data table on page 9 ndoor matching adjustable TXV should be used with any air handler coil Fixed orifice or cap tube systems should
44. re in both heating and cooling modes Disch sat temp Liquid temp Sub cooling HEATING TXV ACTIVE LEFT TO RIGHT ENVISION SERIES INSTALLATION MANUAL Pressure Drop and Recommended Flow Rates Single Speed Dual Capacity Pressure Drop psi Model GPM Pressure Drop psi Model GPM 30 F 50 F 70 F 90 F 110 F 30 F 50 F 70 F 90 F 110 F EN n o spo o eo 5 7 9 5 30 06 5 30 06 31 ENVISION SERIES INSTALLATION MANUAL Troubleshooting Standard Microprocessor Controls To check the unit control board for proper operation 1 Disconnect thermostat wires at the control board 2 Jumper the desired test input Y1 Y2 W O or G to the R terminal to simulate a thermostat signal 3 If control functions properly e Check for thermostat and field control wiring use the diagnostic inputs mode 4 If control responds improperly Ensure that component being controlled is functioning compressor blower reversing valve etc Ensure that wiring from control to the component is functioning refer to the LED Definition table below and use the diagnostic outputs mode e If steps above check properly replace unit control LED Definitions and Diagnostics Standard Microprocessor DIAGNOSTIC MODES NORMAL LED CURRENT DISPLAY MODE EEN S FAULT STATUS INPUTS OUTPUTS 1 OUTPUTS 2 Fases T RTL swe ima swz sor swz ror Drain Pan Overflow Drain Pan Ove
45. ream of the coil to de energize the compressor whenever the furnace is operating Without this switch the Envision Split will trip out on high pressure A dual fuel thermostat can remove the Y1 and Y2 calls when a W call is energized to allow gas furnace backup on an Envision Split application Refer to thermostat wiring on page 15 for details Figure 2 Typical Split System Heat Pump Coil Add On Fossil Fuel Furnace Air Temperature Limit Switch to prevent compressor operation Supply Duct when entering air is greater than 90 F A or Slab Coil Disconnect Insulated Suction Line ke Lineset To Air Handler Thermostat Thermostat Wire From Furnace A Condensate Drain must be trapped DHW Out DHW In Up Flow Fossil Fuel Furnace O Water Out A Water In P T Plugs Vibration Absorbing Pad or Air Pad ENVISION SERIES INSTALLATION MANUAL Water Piping The proper water flow must be provided to each unit whenever the unit operates To assure proper flow use pressure temperature ports to deter mine the flow rate These ports should be located at the supply and return water connections on the unit The proper flow rate cannot be accurately set without measuring the water pressure drop through the refrigerant to water heat exchanger All source water connections on residential units are swivel piping fittings see Figure 3 that accept 1 inch male pipe threads MPT The swivel con n
46. rflow Compressor Blower Lockout On or Low Low FP Thermistor Loop FP Thermistor Loop Compressor Blower lt 15 F Well lt 30 F lt 15 F Well lt 30 F On or High Medium Lockout Y1 High High Pressure gt 600 f Blower PSI Lockout High Pressure gt 600 Reversing Valve High Low Pressure Low Pressure lt 40 Low Pressure lt 40 G Fan Aux Heat 1 Current Sensor SL1 Deme wu jeeem E Refrigerant Systems To maintain sealed circuit integrity do not install service gauges unless unit operation appears abnormal Compare the change in temperature on the air side as well as the water side to the tables on pages 26 27 If the unit s performance is not within the ranges listed and the airflow and water flow are known to be correct gauges should then be installed and super heat and subcooling numbers calculated If superheat and subcooling are outside recommended ranges an adjustment to the refrigerant charge may be necessary Notes Refrigerant tests must be made with desuperheater turned OFF Verify that air and water flow rates are at proper levels before servicing the refrigerant circuit 32 ENVISION SERIES INSTALLATION MANUAL Preventive Maintenance Water Coil Maintenance 1 Keep all air out of the water An open loop system should be checked to ensure that the well head is not allowing air to infiltrate the water line Lines should always be airtight 2 Keep the system under pressure at all
47. talled should be removed prior to setting the unit Care should be taken when units are located in unconditioned spaces to prevent damage from frozen water lines and excessive heat that could damage electrical components Air Coil Location Refer to the air handler manufacturer s instructions for the blower coil unit for details on installing the air handling portion of the system Condensate Drain Follow the blower coil manufacturer s instructions Duct System All blower coil units air coils must be installed as specified by the manufacturer s installation instructions however the following recommendations should considered to minimize noise and service problems An air filter must always be installed upstream of the air coil on the return air side of the air handler or furnace If there is limited access to the filter rack for normal maintenance it is suggested that a return air filter grill be installed Be sure that the return duct is properly installed and free of leaks to prevent dirt and debris from bypassing the filter and plugging the air Coil In applications using galvanized metal ductwork a flexible duct connector is recommended on both the supply and return air plenums to minimize vibration from the blower To maximize sound attenuation of the unit blower the supply and return plenums should include an internal duct liner of 1 inch thick glass fiber or be constructed of ductboard Insulation is usually not installed in the supply b
48. times It is recommended in open loop systems that the water control valve be placed in the discharge line to prevent loss of pressure during off cycles Closed loop systems must have positive static pressure Notes On open loop systems if the installation is in an area with a known high mineral content 125 PPM or greater in the water it is best to establish with the owner a periodic maintenance schedule so the coil can be checked regularly Should periodic coil cleaning be necessary use standard coil cleaning procedures which are compatible with either the cupronickel or copper water lines Generally the more water flowing through the unit the less chance for scaling Other Maintenance Filters Filters must be clean to obtain maximum performance They should be inspected monthly under normal operating condi tions and be replaced when necessary Units should never be operated without a filter Condensate Drain In areas where airborne bacteria produce a slime in the drain pan it may be necessary to treat chemically to minimize the problem The condensate drain can pick up lint and dirt especially with dirty filters Inspect twice a year to avoid the possibility of overflow Blower Motors Blower motors on most air handlers are equipped with sealed ball bearings and require no periodic oiling Desuperheater Coil See Water Coil Maintenance section above Air Coil The air coil must be cleaned to obtain maximum performance Check once a y
49. tion Use a low silver phos copper braze alloy on all brazed connections Envision split units are shipped with a factory charge and service valves are not to be opened until the line set has been leak tested purged and evacuated Schrader cores should be removed before brazing A heat sink should be used on the service valves and TXV to prevent damage caused by excessive heat Service ports for attaching refrigerant gauges Insulated Suction Line Replace caps after opening system Connection Figure 14 Attaching the Air Coil TXV IN toward condensing unit Equalizer Bulb YD Service n Poston desertion system SEU id Ow CW Full In Shipping Position CCW Full Out Operation Position TXV has internal check valve 22 ENVISION SERIES INSTALLATION MANUAL Refrigeration continued Leak Testing The refrigeration line set must be pressurized and checked for leaks before purging and charging the unit To pressurize the line set attach refrigerant gauges to the service ports and add an inert gas nitrogen or dry carbon dioxide until pres sure reaches 60 to 90 PSIG Never use oxygen or acetylene to pressure test Use an electronic leak detector or a good quality bubble solution to detect leaks on all connections made in the field Check the service valve ports and stem for leaks and all connections made in the field If a leak is found repair it and repeat the above steps For
50. tion of this manual for exact superheat and subcooling values Example 036 with 40 foot of 3 8 liquid line Additional to be added 40 ft x 0 5 oz ft 20 oz for accumulator 40 oz Solution 40 oz should be added to the existing 56 oz of factory charge as an initial charge Charging the System Charge Method After purging and evacuating the line set fully open the service valves counterclockwise Add R 410A liquid into the liquid line service port until the pressure in the system reaches approximately 200 PSIG Never add liquid refrigerant into the suction side of a compressor Start the unit and measure superheat and subcooling Keep adding refrig erant until the unit meets the superheat and subcooling values on pages 26 and 27 Checking Superheat and Subcooling Determining Superheat 1 Measure the temperature of the suction line at the point where the expansion valve bulb is clamped 2 Determine the suction pressure in the suction line by attaching refrigeration gauges to the schrader connection on the suction side of the compressor 3 Convert the pressure obtained in Step 2 to the saturation temperature by using the R 410A Pressure Temperature Con version Chart on page 25 4 Subtract the temperature obtained in Step 3 from Step 1 The difference is the amount of superheat for the unit Refer to tables on pages 26 27 for superheat ranges at specific entering water conditions Superheat Adjustment TXV s are factory set
51. ump are started immediately the loop pump s is energized 5 seconds after the Y1 input is received The compressor will be energized on low capacity for Dual Capacity units 10 seconds after the Y1 input The ECM blower will shift from low to medium speed 15 seconds after the Y 1 input 85 of medium speed if in dehumidification mode Cool 2nd Stage Y1 Y2 O Single Speed Units The fan changes to high speed 85 of high speed if in dehumidification mode 15 seconds after the Y2 input ECM only Cool 2nd Stage Y1 Y2 O Dual Capacity Units The second stage compressor will be activated 5 seconds after receiving a Y2 input as long as the minimum first stage compressor run time of 1 minute has expired The ECM blower changes to high speed 15 seconds after the Y2 input 8596 of high speed if in dehumidification mode The Comfort Alert will delay the second stage compressor until 5 seconds after it receives a Y2 from the board Fan G only The fan starts on low speed PSC ON Regardless of fan input G from thermostat the fan will remain on low speed for 30 seconds at the end of each heating cooling or emergency heat cycle Lockout Conditions During lockout mode the appropriate unit and thermostat lockout LEDs will illuminate The compressor loop pump hot water pump and accessory outputs are de energized The fan will continue to run on low speed If the thermostat calls for heating emergency heat operation will
52. ves electronic air cleaners etc The accessory relay has a normally open output and a normally closed output Short Cycle Protection The control employs a minimum off time of four minutes to provide for short cycle protection of the compressor Shutdown Mode A 24VAC common signal to the shutdown input on the control board puts the unit into shutdown mode Compressor hot water pump and fan operation are suspended Safety Controls The Envision control receives separate signals for a high pressure switch for safety a low pressure switch to prevent loss of charge damage and a low suction temperature thermistor for freeze sensing Upon a continuous 30 second measurement of the fault immediate for high pressure compressor operation is suspended the appropriate lockout LED begins flashing Refer to the Fault Retry section below Testing The Envision control allows service personnel to shorten most timing delays for faster diagnostics Refer to the Field Selection DIP switch SW2 1 on page 21 Fault Retry All faults are retried twice before finally locking the unit out An output signal is made available for a fault LED at the thermostat The fault retry feature is designed to prevent nuisance service calls Diagnostics The Envision control board allows all inputs and outputs to be displayed on the LEDs for fast and simple control board diagnosis Refer to the Field Selection DIP Switch SW2 1 on page 21 Hot Wate
53. water tank drain connection and run the other end of the hose to an open drain or outdoors 3 Close the cold water inlet valve to the water heater tank 4 Drain the tank by opening the valve on the bottom of the tank then open the pressure relief valve or hot water faucet 5 Flush the tank by opening the cold water inlet valve to the water heater to free the tank of sediments Close when draining water is clear 6 Disconnect the garden hose and remove the drain valve from the water heater 7 Referto Plumbing Installation and Desuperheater Startup on page 14 A CAUTION Elements will burn out if energized dry Figure 10 Typical Desuperheater Installation Figure 11 Desuperheater Installation in Preheat Tank 3 4 x 3 4 x 1 2 tee Cold Hot Cold Hot Water In Water Out 3 4 x 3 4 x 1 2 tee Water In Water Out or Vent Coupling Venting Waste Valve Venting Waste Valve or Vent Coupling DHW Water Out P T Relief DHW Water Out P T Relief a Water In Drain Valve Water In Drain Valve Drain Valve 13 ENVISION SERIES INSTALLATION MANUAL Plumbing Installation 1 oa9onuogssescom 11 12 0 Inspect the dip tube in the water heater cold inlet for a check valve If a check valve is present it must be removed or damage to the desuperheater circulator will occur Remove drain valve and fitting Thread the 3 4 inch NPT x 3 1 2 inch brass nipple into the water heater
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