Envision R-410A Installation Manual

Geothermal indoor split heat pumps r-410a refrigerant 2 - 6 ton single speed 2 - 6 ton dual capacity

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Residential installation manual (40 pages)

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Summary of Contents for Envision R-410A

Page 1 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 IM1592 06/07...
Page 2: Model Nomenclature
ENVISION SERIES INSTALLATION MANUAL Model Nomenclature Coax Options Model Type C= Copper N= Envision N= Cupronickel Compressor Type Open Option D= Dual Capacity Standard S= Single Speed Hot Water Option Cabinet Configuration None Z= Indoor Split Hot Water Gerneration with...
Page 3: Table Of Contents
ENVISION SERIES INSTALLATION MANUAL Table of Contents Model Nomenclature Physical Characteristics General Installation Information Air Handler Coil Data Line Set Sizes Open Loop Well Water Systems 10-11 Closed Loop Ground Source Systems Desuperheater 1-14 Electical Data Thermostat Wiring Wiring Schematics...
Page 4: General Installation Information
ENVISION SERIES INSTALLATION MANUAL General Installation Information Safety Considerations Before performing service or maintenance operations on a system, turn off main power switches WARNING: to the indoor unit. If applicable, turn off the accessory heater power switch. Electrical shock could cause personal injury.
Page 5: Equipment Selection
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: •...
Page 6 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.
Page 7 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.
Page 8: Water Piping
ENVISION SERIES INSTALLATION MANUAL Water Piping Figure 3: Swivel Connections (Residential Units) 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
Notes: Lineset charge for R410A is 0.50 oz. per ft. for 3/8" and 1.0 oz. per ft. for 1/2" tube. Initial Total System Charge = Factory Envision Split charge + lineset charge + 20 oz, then adjust charge by subcooling and superheat measurements.
Page 10: Open Loop Well Water Systems
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 to minimize mineral formation due to air exposure.
Page 11: Open Loop Well Water Systems
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.
Page 12: Closed Loop Ground Source Systems
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.
Page 13 (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 35º...
Page 14: Desuperheater 1
ENVISION SERIES INSTALLATION MANUAL Plumbing Installation 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.
Page 15: Electical Data
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.
Page 16: Wiring Schematics
ENVISION SERIES INSTALLATION MANUAL Wiring Schematics Envision Series - Dual Capacity 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.
Page 17: Wiring Schematics
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.
Page 18: Microprocessor Control Features And Operation
Diagnostics sequentially every 5 minutes. The Envision control board allows all inputs and outputs to be Emergency Heat (W only) displayed on the LEDs for fast and simple control board diagnosis.
Page 19: Cooling Operation
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,O) The blower motor and hot water pump are started immediately, the loop pump(s) is energized 5 seconds after the “Y1”...
Page 20: Operation Logic Data
ENVISION SERIES INSTALLATION MANUAL Operation Logic Data HEATING COOLING SL1 - IN SL2 - IN OPERATION LOGIC FAN ON STG1 STG2 STG EMERG STG1 STG2 SINGLE SPEED UNITS Compressor Rev Valve Loop Pump DHW Pump Secondary 1- Out Emerg LED...
Page 21: Dip Switch Settings
ENVISION SERIES INSTALLATION MANUAL DIP Switch Settings DIP SWITCH DESCRIPTION OFF POSITION ON POSITION NUMBER NOT USED Service/Test Mode - Allows control of “NORM” or “TEST” opera- tional modes. Test mode accelerates most timing functions 16 Test Norm times to allow faster troubleshooting. Test mode also allows view- ing the “CURRENT”...
Page 22: Refrigeration
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.
Page 23: Leak Testing
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.
Page 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 the stop is reached, any further clockwise turning adjustment will damage the valve.
Page 25 ENVISION SERIES INSTALLATION MANUAL Pressure/Temperature Coversion Chart for R-410A PRESSURE TEMP PRESSURE TEMP PRESSURE TEMP PRESSURE TEMP PRESSURE TEMP (PSIG) °F (PSIG) °F (PSIG) °F (PSIG) °F (PSIG) °F 63.5 96.3 120.6 140.0 64.2 96.8 120.9 140.3 11.2 64.8 97.2 121.3...
Page 26: Unit Operating Parameters
ENVISION SERIES INSTALLATION MANUAL Unit Operating Parameters Single Speed Models Cooling -- No Desuperheater Entering Water Water Flow Suction Discharge Water Temp Air Temp Temp °F GPM/Ton Pressure Pressure Superheat Subcooling Rise °F Drop °F DB PSIG PSIG 120 - 142...
Page 27: Unit Operating Parameters
ENVISION SERIES INSTALLATION MANUAL Unit Operating Parameters Dual Capacity Models First Stage Operation Cooling -- No Desuperheater Entering Water Water Flow Suction Discharge Water Temp Air Temp Superheat Subcooling Temp °F GPM/Ton Pressure Pressure Rise °F Drop °F DB PSIG...
Page 28: Unit Startup
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.
Page 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.
Page 30 ENVISION SERIES INSTALLATION MANUAL Unit Startup/Troubleshooting Heating Cycle Analysis Measure suction temperature here at TXV bulb in heating modes. Measure suction temperature here Volts ____ Suct PSI____ at TXV bulb in cooling modes. Amps ____ Suct sat temp____ Suct temp____...
Page 31: Pressure Drop And Recommended Flow Rates
ENVISION SERIES INSTALLATION MANUAL Pressure Drop and Recommended Flow Rates Single Speed Dual Capacity Pressure Drop (psi) Pressure Drop (psi) Model Model 30°F 50°F 70°F 90°F 110°F 30°F 50°F 70°F 90°F 110°F full load part load full load part load...
Page 32: Troubleshooting 2
ENVISION SERIES INSTALLATION MANUAL Troubleshooting Standard Microprocessor Controls To check the unit control board for proper operation: 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.
Page 33: Preventive Maintenance
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.
Page 34: Physical Dimensions
ENVISION SERIES INSTALLATION MANUAL Physical Dimensions ENVISION - NZ SPLIT DIMENSIONAL DATA NZ 022-030 NZ 036-072 DIMENSION VALUE DIMENSION VALUE DESCRIPTION 19.25 21.25 UNIT HEIGHT 22.50 25.50 UNIT WIDTH 26.50 31.50 UNIT DEPTH 1.93 2.21 WATER IN 6.93 7.21 WATER OUT 8.44...
Page 35 ENVISION SERIES INSTALLATION MANUAL Installation Notes:...
Page 36 Manufactured by: WaterFurnace International, Inc. 9000 Conservation Way Fort Wayne, IN 46809 Product: Envision Series Type: Geothermal Indoor Split Heat Pumps Size: 2 thru 5.5 Ton Single Speed 2 thru 6 Ton Dual Capacity WFI has a policy of continuous product research and...

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