Table of Contents
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Table of Contents
Troubleshooting
Related Manuals for WaterFurnace NSZ
Summary of Contents for WaterFurnace NSZ
- Page 1 Geothermal/Water Source Indoor Split Heat Pump 2 to 6 Tons Single Speed 2 to 6 Tons Dual Capacity Installation Information Water Piping Connections Hot Water Generation Connections Electrical Startup Procedures Troubleshooting Preventive Maintenance IM1003SN 05/10...
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Page 3: Table Of Contents
NSZ/NDZ INSTALLATION MANUAL Table of Contents Model Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Physical Characteristics . -
Page 4: Model Nomenclature
NSZ/NDZ INSTALLATION MANUAL Model Nomenclature Model Type N = Envision Coax Options C = Copper Compressor Type N = Cupronickel D = Dual Capacity Future Option S = Single Speed A = Standard Cabinet Configuration Z = Indoor Split Hot Water Option... -
Page 5: Physical Dimensions
NSZ/NDZ INSTALLATION MANUAL Physical Dimensions Service Valve External Line Height Width Depth Water In Water Out HWG In HWG Out Voltage Pump Voltage Model Liquid 022-030 19.25 22.50 26.50 1.93 6.93 8.44 11.55 13.43 16.43 8.55 10.30 11.80 038-072 21.25 25.50... -
Page 6: General Installation Information
It is recommended that a new R-410A air handler be Refer to the air handler manufacturer’s instructions for the installed with an Envision Split considering the long term blower coil unit for details on installing the air handling benefits of reliability, warranty, etc. versus the short term portion of the system. - Page 7 Connection to Air Coil or turns. All wall penetrations should be sealed properly. Line Figures 1 and 2 illustrate typical Envision Split installations. set should not come into direct contact with water pipes, Reference the Line Set Sizes table for typical line set floor joists, wall studs, duct work, floors, walls and brick.
- Page 8 A-coil or slab coil. Dual fuel installations utilize temperature limit should be installed upstream of the coil the Envision heat pump for heating until the point that aux- to de-energize the compressor whenever the furnace is iliary heat is called for on the thermostat. At that point, the operating.
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Page 9: Physical Data - Envision Air Handler
NSZ/NDZ INSTALLATION MANUAL General Installation Information cont. Air Handler Sizing Selection The Envision Air Handlers are designed for R410a refrigerant and should be matched with Envision Split series compressor section according to the table below. Indoor Split Model Indoor Split Model... -
Page 10: Open Loop - Well Water Systems
NSZ/NDZ INSTALLATION MANUAL Open Loop - Well Water Systems Typical open loop piping is shown below. Always maintain Discharge water from the unit is not contaminated in any water pressure in the heat exchanger by placing water manner and can be disposed of in various ways depending control valves at the outlet of the unit to prevent mineral on local building codes (i.e. -
Page 11: Open Loop - Well Water Systems
NSZ/NDZ INSTALLATION MANUAL Open Loop - Well Water Systems cont. 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
NSZ/NDZ INSTALLATION MANUAL Closed Loop - Ground Source Systems NOTE: For closed loop systems with antifreeze protection, set Multiple Units on One Flow Center SW2-2 to the “loop” position (see DIP Switch Settings table). When two units are connected to one loop pumping... -
Page 13: Hot Water Generator Connections
DHW shown below. Electric water heaters are recommended. circulating through the unit. To overcome this, Envision unit Make sure all local electrical and plumbing codes are microprocessors have been programmed to disengage the followed when installing a hot water generator. -
Page 14: Hot Water Generator Connections
NSZ/NDZ INSTALLATION MANUAL Hot Water Generator Connections cont. Plumbing Installation Hot Water Generator Startup Inspect the dip tube in the water heater cold inlet Close the drain valve to the water heater. for a check valve. If a check valve is present it must Open the cold water supply to the tank. -
Page 15: Electrical Data
NSZ/NDZ INSTALLATION MANUAL Electrical Data 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 electrical data for fuse or circuit breaker sizing information. -
Page 16: Wiring Schematics
Used Orange Without Electric Heat / Normal Dehum / Norm Switch - Low pressure Loop Pump Envision / E Series or Premier Not Used No Htg3 / Htg3 NOTE 1 Inputs / Norm Not Used Switch -Hot Water On /Off... - Page 17 Used Orange Without Electric Heat / Normal Dehum / Norm Switch - Low pressure Loop Pump Envision / E Series or Premier Not Used No Htg3 / Htg3 NOTE 1 Inputs / Norm Not Used Switch -Hot Water On/Off Outputs / Norm...
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Page 18: Microprocessor Control
Diagnostics The unit will not operate until all the inputs and safety The Envision control board allows all inputs and outputs to controls are checked for normal conditions. At first power- be displayed on the LEDs for fast and simple control board up, a four-minute delay is employed before the compressor diagnosis. -
Page 19: Cooling Operation
NSZ/NDZ INSTALLATION MANUAL Microprocessor Control cont. Heat, 3rd Stage (Y1,Y2,W) Single-Speed Units Lockout Conditions The first stage of resistance heat is energized 10 seconds During lockout mode, the appropriate unit and thermostat after “W” input, and with continuous 3rd stage demand, lockout LEDs will illuminate. - Page 20 NSZ/NDZ INSTALLATION MANUAL Microprocessor Control cont. Compressor Monitoring/Comfort Alert pressor alerts are displayed on the module by flashing the yellow Alert LED a specific number of times consecutively The Comfort Alert displays abnormal compressor condi- followed by a pause, and then repeated. The number of tions through a unique flash code and communicates the consecutive flashes or “Flash Code”...
- Page 21 NSZ/NDZ INSTALLATION MANUAL Microprocessor Control cont. Thermostat Displays thermostat can be configured to show either lockout text or lockout codes. Fault Flash When using a TA32W01 or TP32W02 thermostat and SW2- The LED board on the front of the unit will display all 8 is in the pulsing “L”...
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Page 22: Operation Logic Data
NSZ/NDZ INSTALLATION MANUAL Operation Logic Data HEATING COOLING SL1 - IN SL2 - IN OPERATION LOGIC FAN ON STG1 STG2 STG3 EMERG STG1 STG2 SINGLE SPEED UNITS Compressor Rev Valve Loop Pump DHW Pump Secondary 1- Out Emerg LED T-Stat Signal... -
Page 23: Refrigeration
NSZ/NDZ INSTALLATION MANUAL Refrigeration The Envision series comes with a holding charge. The Fasten the copper line set to the blower coil unit as charge must be adjusted in the field based on performance. instructed by the coil installation instructions shown in Refrigeration piping on the split consists of installing a Figure 14. - Page 24 Charge Amount When Using NAH Air Handler Measure the temperature of the suction line at the The Envision Split is shipped with a factory pre-charge. This point where the expansion valve bulb is clamped. volume of refrigerant is not sufficient to run the system and Determine the suction pressure in the suction line additional refrigerant must be added.
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Page 25: Refrigeration
NSZ/NDZ INSTALLATION MANUAL Refrigeration cont. 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 26: Pressure/Temperature Conversion Chart For R-410A
NSZ/NDZ INSTALLATION MANUAL Pressure/Temperature Conversion 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... -
Page 27: Operating Parameters
NSZ/NDZ INSTALLATION MANUAL Operating Parameters Single Speed Models - NSZ022 thru NSZ070 (with NAH Series Air Handler) Cooling -- No Hot Water Generator NSZ022 thru NSZ060 NSZ070 NSZ022 thru NSZ070 Entering Water Water Temp Flow Suction Discharge Suction Discharge Water Temp... - Page 28 NSZ/NDZ INSTALLATION MANUAL Operating Parameters cont. NDZ026 thru NDZ072 (with NAH Series Air Handler) First Stage Operation Cooling -- No Hot Water Generator NDZ026 thru NDZ064 NDZ072 NDZ026 thru NDZ072 Entering Water Flow Suction Discharge Suction Discharge Water Temp Water Temp...
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Page 29: Pressure Drop And Recommended Flow Rates
NSZ/NDZ 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 full... - Page 30 NSZ/NDZ INSTALLATION MANUAL Unit Startup Before Powering Unit, Check The Following: Initiate a control signal to place the unit in the heating mode. Heating set point must be set above room • High voltage is correct and matches nameplate. temperature.
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Page 31: Unit Startup And Troubleshooting
NSZ/NDZ 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____ Super heat____... -
Page 32: Troubleshooting
NSZ/NDZ 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 valve, Disconnect thermostat wires at the control board. etc.). -
Page 33: Preventative Maintenance
NSZ/NDZ INSTALLATION MANUAL Preventative 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
NSZ/NDZ INSTALLATION MANUAL Service Parts List Single Speed Split Units Dual Capacity Split Units Compressor 34P581-01 34P582-01 34P583-01 34P578-01 34P579-01 34P580-01 34P561-05 34P585-01 34P573-01 34P574-01 34P575-01 34P586-01 Run Capacitor 16P002-18 16P002-20 16P002-21 16P002-25 16P002-24 16P002-19 16P002-20 16P002-21 16P002-24 Sound Jacket... - Page 36 Manufactured by WaterFurnace International, Inc. 9000 Conservation Way Fort Wayne, IN 46809 www.waterfurnace.com Product: Envision Series Type: Geothermal/Water Source Indoor Split Heat Pumps Size: 2-6 Ton Single Speed 2-6 Ton Dual Capacity Document: Installation Manual IM1003SN 05/10 ©2010 WaterFurnace International, Inc., 9000 Conservation Way, Fort Wayne, IN 46809-9794. WaterFurnace has a policy of continual product research and development and...