Page 2 - Model Nomenclature; None; Physical Characteristics; Model
2 ENVISION SERIES INSTALLATION MANUAL Model Nomenclature N D Z 049 A 1 1 A C 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 w...
Page 3 - Table of Contents
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 1-14 Electical Data 14 Thermostat ...
Page 4 - Use a quenching cloth for brazing operations.; General Installation Information
4 ENVISION SERIES INSTALLATION MANUAL 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 ...
Page 5 - Equipment Selection; Coil currently is R-410A rated; General Installation Information (continued)
5 ENVISION SERIES INSTALLATION MANUAL 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 noi...
Page 6 - Air Handler Installation
6 ENVISION SERIES INSTALLATION MANUAL Disconnect Thermostat WireFrom Air Handler Vibration Absorbing Pad or Air Pad P/T Plugs Water Out Water In Lineset To Air Handler Insulated Suction Line Supply Duct Wire To Thermostat Return Duct Condensate Drain (must be trapped) To Drain Remote Air Handler (Ma...
Page 7 - Dual Fuel Systems; for typical Dual Fuel application.
7 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, ...
Page 8 - Water Piping; Check carefully for water leaks.
8 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...
Page 9 - Air Handler Coil Data; Line Set Sizes
9 ENVISION SERIES INSTALLATION MANUAL Air Handler Coil Data Notes: * Variable speed air handler required for all dual capacity units. Line Set Sizes Envision Split Model Matching Air Handler Coil Surface Area (sq ft.) FPI Rows Tube Diameter 022 - 038 042 - 072 NAH060 5.83 12 3 3/8" NAH036 5.83 1...
Page 10 - Open Loop - Well Water Systems; water systems or sytems that; Solenoid
10 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 precipitation. Use a closed bladder type expansion tank ...
Page 11 - Solenoid Wiring
11 ENVISION SERIES INSTALLATION MANUAL 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 situatio...
Page 12 - Closed Loop Ground Source Systems; than during the cooling season.; Multiple Units on One Flow Center
12 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 charg...
Page 13 - Desuperheater Connections; installing a desuperheater.; CAUTION: Elements will burn out if energized dry.; Water Tank Preparation
1 ENVISION SERIES INSTALLATION MANUAL Figure 11: Desuperheater Installation in Preheat Tank Figure 10: Typical Desuperheater Installation Drain Valv e In P/T Relief Valv e Cold Water In Hot Water Out DHW Water In DHW Water Out Venting Waste Valv e or Vent Coupling 3/4˝ x 3/4˝ x 1/2˝ tee Drain Valve ...
Page 14 - Plumbing Installation; or damage to the desuperheater circulator will occur.; Desuperheater Startup
14 ENVISION SERIES INSTALLATION MANUAL Plumbing Installation 1. 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. 2. Remove drain valve and fitting.3. Thread the 3/4-inch NPT x 3...
Page 15 - General; cal data for fuse or cicuit breaker sizing information.; Electrical Data; Ther mostat Wiring; Electrical
15 ENVISION SERIES INSTALLATION MANUAL 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...
Page 16 - Wiring Schematics
16 ENVISION SERIES INSTALLATION MANUAL Wiring Schematics Envision Series - Dual Capacity Split Wiring Schematic - 208-230/60/1 HWL HP LP WCL 97P774-31 3/9/07 St at us LE D PC B SW4 RRRRRGYR T T 240V L2 240V L1 240V L2 P6 Premier 2 Microprocessor Logic Control (DC Voltage) P1 Fused L2 R C CC-GND NO C...
Page 18 - Microprocessor Control
18 ENVISION SERIES INSTALLATION MANUAL 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...
Page 19 - Cooling Operation; Lockout Conditions
19 ENVISION SERIES INSTALLATION MANUAL 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,O) The blower motor and hot water pump are started immediately, th...
Page 20 - Operation Logic Data
20 ENVISION SERIES INSTALLATION MANUAL OPERATION LOGIC HEATING COOLING FAN ON SL1 - IN ON SL2 - IN ON STG1 STG2 STG EMERG STG1 STG2 SINGLE SPEED UNITS Compressor On On On Off On On - - - Rev Valve Off Off Off Off On On - - - Loop Pump On On On Off On On - On - DHW Pump On Off Off Off On On - - - Sec...
Page 21 - DIP Switch Settings
21 ENVISION SERIES INSTALLATION MANUAL DIP SWITCH NUMBER DESCRIPTION OFF POSITION ON POSITION SW1 N/A NOT USED N/A N/A SW2 1 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 al...
Page 22 - Connection to Air Coil; Braze line set to the service valve stubs on the; Refrigeration; Equalizer Bulb
22 ENVISION SERIES INSTALLATION MANUAL 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 sectio...
Page 23 - Leak Testing; mated using the following equation:; Charging the System; Determining Superheat; the TXV to other superheat settings:
2 ENVISION SERIES INSTALLATION MANUAL 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 - ...
Page 24 - Determining Subcooling; Conversion Chart on page 25.
24 ENVISION SERIES INSTALLATION MANUAL 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 ...
Page 25 - Pressure/Temperature Coversion Char t for R-410A
25 ENVISION SERIES INSTALLATION MANUAL Pressure/Temperature Coversion Char t for R-410A PRESSURE (PSIG) TEMP °F PRESSURE (PSIG) TEMP °F PRESSURE (PSIG) TEMP °F PRESSURE (PSIG) TEMP °F PRESSURE (PSIG) TEMP °F 60 8.5 180 63.5 300 96.3 420 120.6 540 140.0 62 9.9 182 64.2 302 96.8 422 120.9 542 140.3 64...
Page 26 - Single Speed Models; Unit Operating Parameters
26 ENVISION SERIES INSTALLATION MANUAL Single Speed Models Unit Operating Parameters Suction Pressure PSIG Discharge Pressure PSIG Superheat Subcooling Water Temp Rise °F Air Temp Drop °F DB 1.5 120 - 142 215 - 240 7 - 15 7 - 14 18 - 22 18 - 22 3.0 115 - 138 190 - 225 10 - 18 4 - 11 8 - 10 18 - 22 1...
Page 27 - Dual Capacity Models
27 ENVISION SERIES INSTALLATION MANUAL Dual Capacity Models Unit Operating Parameters Note: Cooling performance based on entering air temperatures of 80º F DB, 67º F WB. Heating performance based on entering air temperature of 70º F DB. First Stage Operation Suction Pressure PSIG Discharge Pressure ...
Page 28 - High voltage is correct and matches nameplate.; Startup Steps; instructions and complete the startup procedure.; Unit Star tup; Before Powering Unit, Check The Following
28 ENVISION SERIES INSTALLATION MANUAL 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 loo...
Page 29 - Final Evaluation
29 ENVISION SERIES INSTALLATION MANUAL 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...
Page 30 - Heating Cycle Analysis; Cooling Cycle Analysis; Unit Star tup/Troubleshooting
0 ENVISION SERIES INSTALLATION MANUAL Heating Cycle Analysis COOLING TXV - ACTIVERIGHT TO LEFT ClgTXV Lineset length Measure liquid linetemperature andpressure here inboth heating andcooling modes COAX HEATING TXV - ACTIVE LEFT TO RIGHT HtgTXV Measure suction temperaturehere at TXV bulb in heating m...
Page 31 - Pressure Drop and Recommended Flow Rates; Single Speed
1 ENVISION SERIES INSTALLATION MANUAL Pressure Drop and Recommended Flow Rates 30°F 50°F 70°F 90°F 110°F 4 1.4 1.3 1.2 1.1 1.0 6 2.8 2.6 2.4 2.3 2.1 8 4.7 4.4 4.1 3.8 3.5 10 7.0 6.6 6.2 5.8 5.3 3 0.8 0.7 0.7 0.7 0.6 5 2.0 1.8 1.7 1.6 1.5 7 3.6 3.4 3.2 3.0 2.8 9 5.8 5.5 5.1 4.8 4.4 5 1.2 1.2 1.1 1.0 ...
Page 32 - Troubleshooting; Standard Microprocessor Controls; If steps above check properly, replace unit control.; Refrigerant Systems; the refrigerant charge may be necessary.; LED Definitions and Diagnostics; Standard Microprocessor
2 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...
Page 33 - Preventive Maintenance; Water Coil Maintenance; Filters; possibility of overflow.; Blower Motors; See Water Coil Maintenance section above.; Air Coil; Replacement Procedures; Obtaining Parts; warranty return authorization and assistance.
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 ...
Page 34 - Physical Dimensions; DIMENSION VALUE DIMENSION VALUE; ENVISION - NZ SPLIT DIMENSIONAL DATA
4 ENVISION SERIES INSTALLATION MANUAL Physical Dimensions DIMENSION VALUE DIMENSION VALUE DESCRIPTION A 19.25 A 21.25 UNIT HEIGHT B 22.50 B 25.50 UNIT WIDTH C 26.50 C 31.50 UNIT DEPTH D 1.93 D 2.21 WATER IN E 6.93 E 7.21 WATER OUT F 8.44 F 9.21 BRASS SERVICE VALVE (LIQUID) G 11.55 G 12.14 BRASS SERV...
