Related Manuals for Envision NDS026 Series
Summary of Contents for Envision NDS026 Series
- Page 1 Geothermal/Water Source Outdoor Split Heat Pump 2 to 6 Tons Dual Capacity Installation Information Water Piping Connections Electrical Data Startup Procedures Troubleshooting Preventive Maintenance IM1004SN 03/11...
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Page 3: Table Of Contents
NDS OUTDOOR SPLIT INSTALLATION MANUAL Table of Contents Model Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 General Installation Information . -
Page 4: Model Nomenclature
NDS OUTDOOR SPLIT INSTALLATION MANUAL Model Nomenclature Model Type Coax Options N = Envision C = Copper N = Cupronickel Compressor Type Flow Center D = Dual Capacity A = None Cabinet Configuration B = Flow Center* S = Outdoor Split... -
Page 5: General Installation Information
Refer to the air handler manufacturer’s instructions for the It is recommended that a new R-410A air handler be blower coil unit for details on installing the air handling installed with an Envision Split considering the long term portion of the system. - Page 6 Typical Split System Application - Remote Blower Coil Disconnect and Typical Split System Heat Pump Coil Add-on Fossil Fuel Furnace illustrations show typical Envision Split installations. The Line Set Sizes table shows typical line set diameters and maximum length. Line sets over 60 feet are not recommended.
- Page 7 Dual Fuel Systems In add-on Envision Split applications, the coil should Envision units can be connected to fossil fuel furnaces that be located in the supply side of the furnace to avoid include an A-coil or slab coil. Dual fuel installations utilize condensation damage to the furnace heat exchanger.
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Page 8: Water Quality
NDS OUTDOOR SPLIT INSTALLATION MANUAL Water Quality In ground water situations where scaling could be heavy with extremely hard water, the owner should be informed or where biological growth such as iron bacteria will be that the heat exchanger may require occasional flushing. present, a closed loop system is recommended. -
Page 9: Water Piping
NDS OUTDOOR SPLIT INSTALLATION MANUAL Water Piping Flow Center Installation Residential NDS split units are supplied standard with GeoLink swivel connections with P.T. ports. Flow centers FC1-GL or FC2-GL, as needed, may be internally mounted on the NDS splits, Two stub tubes with CAUTION: Water piping exposed to outside barbs are pre connected to the coax. -
Page 10: Electrical Data
Min/Max voltage of 197/253. All fuses Class RK-5 * With optional IntelliStart Thermostat Wiring Thermostat Wiring for Dual Fuel Applications Thermostat Wiring Typical EZ Wiring Diagram Envision Split Thermostat Thermostat Envision Split 1st Stage Compressor 1st Stage Compressor 2nd Stage Compressor... -
Page 11: Dimensional Data
NDS OUTDOOR SPLIT INSTALLATION MANUAL Dimensional Data Cabinet Dimensions and Refrigerant Piping Connections Top View Front View Rear View WATER OUT WATER IN Suction Line Connection Lineset connections are braze type Liquid Line Connection internally mounted Side View Side View Model 36.0 23.9... -
Page 12: Model Nomenclature - Air Handler
NDS OUTDOOR SPLIT INSTALLATION MANUAL Model Nomenclature - Air Handler Model Type Air Coil NAH = Envision Series Air Handler R = Refrigerant H = Hydronic Unit Capacity Refrigerant Models Nom. CFM Motor 022 MBTUH 1 = ECM 208-230/60/1 026 MBTUH... -
Page 13: Physical Data - Air Handler
Nominal cooling capacity - tons [kW] 2.1 [7.59] 3 [10.55] 4 [14.06] 5 [17.58] NR = Envision Refrigerant Coil U = Uncased Condensate drain connection - (FPT) in. [mm] 3/4 [19.05] NH = Envision Hydronic Coil Blower Wheel Size (Dia x W), in. [mm]... -
Page 14: Wiring Schematics
No RPM / RPM Fan / Comp Used Without Orange Must be On Not Used Loop Pump Envision / E Series or Premier Not Used Not Used Polari NOTE 2 Inputs / Norm Not Used Outputs / Norm Not Used... - Page 15 NDS OUTDOOR SPLIT INSTALLATION MANUAL Wiring Schematics cont. Dual Capacity Split - 208-230/60/1 cont. Logic Board Physical Layout Notes 1 - Connection of remote unit that does not have a loop pump for slave operation. 2 - 24V Accessory relay (see SW2 -3 for description of operation) 3 - Field installed DPDT dual fuel relay.
- Page 16 No RPM / RPM Fan / Comp Used Without Orange Must be On Not Used Loop Pump Envision / E Series or Premier Not Used Not Used NOTE 2 Inputs / Norm Not Used Outputs / Norm Not Used Acc Com...
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Page 17: Wiring Schematics
NDS OUTDOOR SPLIT INSTALLATION MANUAL Wiring Schematics cont. Dual Capacity Split with IntelliStart - 208-230/60/1 cont. Logic Board Physical Layout Run Winding IntelliStart Pink Active N.C. N.O. N.O. N.O. N.O . Blue Start Black Common CR2- Loop CR1- DHW CR3- CR4- Pump Pump... -
Page 18: Microprocessor Control
The blower changes to high speed (85% of high speed if Diagnostics in dehumidification mode) 15 seconds after the “Y2” input The Envision control board allows all inputs and outputs to (ECM only). be displayed on the LEDs for fast and simple control board diagnosis. - Page 19 NDS OUTDOOR SPLIT INSTALLATION MANUAL Microprocessor Control cont. Cool, 2nd Stage (Y1, Y2, O) Dual Capacity Units High Pressure The second stage compressor will be activated 5 seconds This lockout mode occurs when the normally closed safety after receiving a “Y2” input as long as the minimum first switch is opened momentarily (set at 600 PSI).
- Page 20 NDS OUTDOOR SPLIT INSTALLATION MANUAL Microprocessor Control cont. Compressor Monitoring/Comfort Alert passive. All compressor alerts are displayed on the module by flashing the yellow Alert LED a specific number of times The Comfort Alert displays abnormal compressor consecutively followed by a pause, and then repeated. The conditions through a unique flash code and communicates number of consecutive flashes or “Flash Code”...
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Page 21: Microprocessor Control
NDS OUTDOOR SPLIT INSTALLATION MANUAL Microprocessor Control cont. Thermostat Displays user to view the thermostat and determine the fault. The thermostat can be configured to show either lockout text Fault Flash or lockout codes. When using a TA32W02 or TP32W03 thermostat and SW2-8 is in the pulsing “L”... -
Page 22: Operation Logic Data
ECM Blower Monitoring - Set for No PRM on split systems No RPM NOT USED 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 Envision E-Series or Premier capacity units. -
Page 23: Refrigeration
Measure the temperature of the suction line at the point where the expansion valve bulb is clamped. The Envision Split is shipped with a facotry pre-charge. This Determine the suction pressure in the suction line volume of refrigerant is not sufficient to run the system and by attaching refrigeration gauges to the schrader additional refrigerant must be added. -
Page 24: Line Set Sizes
NDS OUTDOOR SPLIT INSTALLATION MANUAL Refrigeration cont. adjusting the superheat stem clockwise (superheat increase) and the stop is reached, any further clockwise turning adjustment will damage the valve. Determining Subcooling Measure the temperature of the liquid line on the small refrigerant line (liquid line) just outside the split cabinet. - Page 25 NDS OUTDOOR SPLIT 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 97.2 121.3 140.6...
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Page 26: Operating Parameters
NDS OUTDOOR SPLIT INSTALLATION MANUAL Operating Parameters First Stage Operation Cooling -- No Desuperheater NDS026 thru NDS064 NDS072 NDS026 thru NDS072 Entering Water Flow Suction Discharge Suction Discharge Water Temp Water Temp Air Temp GPM/Ton Pressure Pressure Pressure Pressure Superheat Subcooling °F Rise °F... -
Page 27: Pressure Drop
NDS OUTDOOR SPLIT INSTALLATION MANUAL Pressure Drop Compressor Resistance Dual Capacity Compressor Resistance Chart (Ohms) 208-230/60/1 Pressure Drop (psi) Model Model Start 30°F 50°F 70°F 90°F 110°F 1.23-1.30 1.41-1.50 .829-.954 1.19-1.38 full .590-.679 1.41-1.62 load .455-.524 .558-.643 .344-.395 .495-.570 1/13/11 part load Thermistor Resistance... -
Page 28: Refrigerant Circuit Guideline
NDS OUTDOOR SPLIT INSTALLATION MANUAL Refrigerant Circuit Guideline Head Suction Compressor Air Temp. Water Temp. Symptom Superheat Subcooling Pressure Pressure Amp Draw Differential Differential Under Charged System (Possible Leak) High Over Charged System High High High Normal High Normal/Low Normal Low Air Flow Heating High High... -
Page 29: Reference Calculations
NDS OUTDOOR SPLIT INSTALLATION MANUAL Reference Calculations Heating Calculations: Cooling Calculations: LWT = EWT + LWT = EWT - GPM x 500 GPM x 500 LAT (DB) = EAT (DB) - LAT = EAT + CFM x 1.08 CFM x 1.08 LC = TC - SC TH = HC + HW S/T =... - Page 30 NDS OUTDOOR SPLIT INSTALLATION MANUAL Startup Before Powering Unit, Check The Following Decrease the cooling set point several degrees and verify high-speed blower operation. • High voltage is correct and matches nameplate. Adjust the cooling setpoint above the room • Fuses, breakers and wire size correct.
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Page 31: Startup And Troubleshooting
NDS OUTDOOR SPLIT INSTALLATION MANUAL Startup and 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____ Super heat____ Lineset... -
Page 32: Troubleshooting
NDS OUTDOOR SPLIT INSTALLATION MANUAL Troubleshooting Standard Microprocessor Controls If control responds improperly: • Ensure that component being controlled is To check the unit control board for proper operation: functioning (compressor, blower, reversing Disconnect thermostat wires at the control board. valve, etc.). -
Page 33: Preventive Maintenance
NDS OUTDOOR SPLIT INSTALLATION MANUAL Preventive Maintenance Water Coil Maintenance Condensate Drain In areas where airborne bacteria produce a slime in the Keep all air out of the water. An open loop system drain pan, it may be necessary to treat chemically to should be checked to ensure that the well head is not minimize the problem. -
Page 34: Service Parts List
NDS OUTDOOR SPLIT INSTALLATION MANUAL Service Parts List Dual Capacity Split Units Part Description Compressor 34P585-01 34P573-01 34P574-01 34P575-01 34P586-01 Run Capacitor 16P002D19 16P002D20 16P002D21 16P002D39 Sound Jacket 92P504A16 Power Harness 11P781-01 Solenoid Harness 11P782-01 Accumulator 36P509-02 36P509-01 Coax 62I504B01 62I542B01 62I543B01 33P609-01... - Page 36 Manufactured by WaterFurnace International, Inc. 9000 Conservation Way Fort Wayne, IN 46809 www.waterfurnace.com Product: Envision NDS Type: Geothermal/Water Source Outdoor Split Heat Pump Size: 2-6 Tons Dual Capacity Document: Installation Manual IM1004SN 03/11 ©2011 WaterFurnace International, Inc., 9000 Conservation Way, Fort Wayne, IN 46809-9794. WaterFurnace has a policy of continual product research and development and...
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