Envision R-410A Installation Manual
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Summary of Contents for Envision R-410A
- Page 1 Geothermal/Water Source Outdoor Split Heat Pumps • R-410A Refrigerant • 2, 3, 4, 5, 6 Ton Dual Capacity Installation Information Water Piping Connections Electrical Startup Procedures Troubleshooting Preventive Maintenance ™ IM1615 10/08...
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Page 3: Table Of Contents
NS SPLIT INSTALLATION MANUAL Table of Contents Nomenclature Physical Characteristics General Installation Information Electrical Data Water Piping Air Handler Nomenclature & Coil Data Line Set Sizing Physical Data Envision Coil Nomenclature Refrigerant Coil Compatability Heat Recovery Unit Wiring Schematics Modes of Operation Operation Logic DIP Switch Settings Refrigeration 17-19 Pressure/Temperature Conversion Chart Unit Operating Parameters Pressure Drop and Recommended Flow Rates Unit Startup & Troubleshooting 23-26 Preventive Maintenance Replacement Procedures Physical Dimensions... -
Page 4: Nomenclature
NS SPLIT INSTALLATION MANUAL Model Nomenclature Model Type N = Envision Coax Options C = Copper Compressor Type N = Cupronickel D = Dual Capacity Future Option Cabinet Configuration S = Outdoor Split Hot Water Option Unit Capacity 0 = None... -
Page 5: General Installation Information
NS SPLIT INSTALLATION MANUAL General Installation Information Safety Considerations Before performing service or maintenance operations on a system, turn off main power WARNING: switches to both units. Turn off accessory heater power switch if applicable. Electrical shock could cause personal injury. Installing and servicing heating and air conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified ser- vice personnel should install, repair or service heating and air conditioning equipment. 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. -
Page 6: 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 benefits of reliability, warranty, etc. versus the short term installation cost savings. However, the existing air handler may be retained provided the following: •... - Page 7 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 8 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.
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Page 9: Electrical Data
Min/Max Voltage of 197/253. All fuses Class RK-5. Thermostat Wiring Figure 3b: Thermostat Wiring for Dual Fuel Applications Figure 3a: Thermostat Wiring Typical EZ Wiring Diagram Envision Split Thermostat Thermostat Envision Split 1st Stage Compressor 1st Stage Compressor 2nd Stage Compressor... -
Page 10: Water Piping
NS SPLIT INSTALLATION MANUAL Water Piping Residential NS split units are supplied standard with GeoLink swivel connections with P.T. ports. CAUTION: Water piping exposed to outside temperatures may be subject to freezing. 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 determine the flow rate. -
Page 11: Air Handler Nomenclature & Coil Data
NS SPLIT INSTALLATION MANUAL Air Handler Nomenclature Model Type Air Coil NAH = Envision Air Handler R = Refrigerant H = Hydronic Unit Capacity Refrigerant Models Nom. CFM Motor 022 MBTUH 1 = ECM 208-230/60/1 026 MBTUH 030 MBTUH 036 MBTUH... -
Page 12: Physical Data
NS SPLIT INSTALLATION MANUAL Physical Data Air Handler Model Number (Refrigerant) NAH022 NAH026 NAH030 NAH036 NAH042 NAH048 NAH060 Air Coil Total Face Area, ft2 [m2] 5.83 [0.54] Tube outside diameter - in. [mm] 3/8 [9.52] Number of rows Evaporator Coil Fins per inch Suction line connection - in. -
Page 13: Envision Coil Nomenclature
NS SPLIT INSTALLATION MANUAL Envision Coil Nomenclature Cabinet Model Type C = Encased NR = Envision Refrigerant Coil U = Uncased NH = Envision Hydronic Coil Capacity Configuration Refrigerant Models A = "A" Coil 026 MBTUH 036 MBTUH 048 MBTUH... -
Page 14: Heat Recovery Unit
NS SPLIT INSTALLATION MANUAL Heat Recovery Unit for Domestic Hot Water Service valves have been provided inside the unit for connecting the discharge gas line to a water heating heat recov- ery unit (see figure 5). To make the connections, close the service valves inside the unit by turning clockwise. Using a recovery canister connect to either of the schrader ports on the DSH service valves and recover the small amount of refrig- erant trapped inside of the U-tube. -
Page 15: Wiring Schematics
NS SPLIT INSTALLATION MANUAL Wiring Schematics Envision Series - Dual Capacity Split Wiring Schematic - 208-230/60/1 240V 240V Fused Fused Fused Fused Fused 240V 240V USED 240V F1-10A USED Status... -
Page 16: Modes Of Operation
NS SPLIT INSTALLATION MANUAL Modes of Operation Heating Operation Note: At first power up, a four-minute time delay is employed before the compressor is energized. Heat, 1st Stage (Y1) The compressor and loop pumps are energized 10 seconds after the Y1 input. Heat, 2nd Stage (Y1,Y2) Dual Capacity Units The second stage compressor will be activated 5 seconds after receiving a “Y2”... -
Page 17: Operation Logic
NS SPLIT INSTALLATION MANUAL Operation Logic Data HEATING COOLING OPERATION LOGIC SL1 - IN ON STG1 STG2 STG3 EMERG STG1 STG2 DUAL CAPACITY UNITS Compressor-Lo Compressor-Hi Rev Valve Loop Pumps Secondary 1- Out Secondary 2- Out Emerg LED Y1, Y2 Y1, Y2, W Y1, O Y1, Y2, O T-Stat Signal... -
Page 18: Dip Switch Settings
ECM Fan Monitoring - Set for No PRM on split systems No RPM NOT USED On dual capacity units this switch allows stage change: on the fly E-Series or when off, and 1 minute delay when on. A delay is required on all Envision Premier reciprocating dual capacity units. -
Page 19: 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 20: Pressure/Temperature Conversion Chart
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 21 NS SPLIT INSTALLATION MANUAL Refrigeration (continued) 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 22 NS 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 12.5...
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Page 23: Unit Operating Parameters
NS SPLIT INSTALLATION MANUAL Unit Operating Parameters Dual Capacity Models First Stage Operation 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 125-140 205-225... -
Page 24: Pressure Drop And Recommended Flow Rates
NS SPLIT INSTALLATION MANUAL Pressure Drop and Recommended Flow Rates Dual Capacity Pressure Drop (psi) Model 110°F 30°F 50°F 70°F 90°F 110°F full load part load full load part load full load part load full load 5/30/06 part load full load part load... -
Page 25: Unit Startup & Troubleshooting
NS SPLIT 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 26 NS SPLIT INSTALLATION MANUAL Unit Startup (cont.) 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.
- Page 27 NS SPLIT 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____ Lineset length...
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Page 28: Troubleshooting
NS SPLIT 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. -
Page 29: Preventive Maintenance
NS SPLIT 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. -
Page 30: Physical Dimensions
NS SPLIT INSTALLATION MANUAL Physical Dimensions Cabinet Dimensions and Refrigerant Piping Connections Top View Front View Connection Point for Field Installed Rear View Heat Recovery Unit WATER OUT WATER IN Suction Line Connection Lineset connections are braze type Liquid Line Connection internally mounted Side View... - Page 32 Manufactured by WaterFurnace International, Inc. 9000 Conservation Way Fort Wayne, IN 46809 Product: Envision Series - NS Outdoor Split Type: Geothermal/Water Source Heat Pumps Size: 2-6 Tons Document: Installation Manual I M 1 6 1 5 1 0/0 8 WaterFurnace International, Inc., 9000 Conservation Way, Fort Wayne, IN 46809-9794. WaterFurnace has a policy of continual product research and development and reserves the right to change...
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