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50NHB
Single-Packaged Heat Pump System
With Puron Advance™ (R-454B) Refrigerant
Single Phase
2 to 5 Nominal Tons (Sizes 024-060)
IMPORTANT:
Effective January 1, 2015, all split system and
packaged air conditioners must be installed pursuant to applicable
regional efficiency standards issued by the Department of Energy.
NOTE:
Read the entire instruction manual before starting the
installation.
NOTE: Installer: Make sure the Owner's Manual and Service
Instructions are left with the unit after installation.
Fig. 1 - 50NHB 024-036
Fig. 2 - 50NHB 042-060
Certified to leak 2% or less of nominal air conditioning CFM delivered
when pressurized to 1-in. W.C. with all present air inlets, air outlets, and
condensate drain port(s) sealed.
Table of Contents
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Receiving and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Transport and Storage Considerations . . . . . . . . . . . . . . . . . . . . . . 3
Identify Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Inspect Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Slab Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Installation Instructions
A10165
A150067
Ground Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Configuring Units for Downflow (Vertical) Discharge. . . . . . . . . 8
High-Voltage Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Routing Power Leads into Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Connecting Ground Lead to Unit Ground . . . . . . . . . . . . . . . . . . . 9
Routing Control Power Wires (24-V) . . . . . . . . . . . . . . . . . . . . . . 9
Accessory Electric Heat Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Pre-Start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Checking Cooling and Heating Control Operation . . . . . . . . . . . 12
No Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Low Charge Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Heating Mode Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Fan Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Cooling Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Heating Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Continuous Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Demand Defrost Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Unit Top Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Indoor Blower and Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Outdoor Coil, Indoor Coil, and Condensate Drain Pan . . . . . . . . 20
Outdoor Fan Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Electrical Controls and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Refrigerant Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Indoor Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Metering Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
High Flow Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
High Pressure Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Loss of Charge Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Puron Advance (R-454B) Compressor . . . . . . . . . . . . . . . . . . . . 21
Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Compressor Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Servicing Systems on Roofs with Synthetic Materials . . . . . . . . 21
Synthetic Roof Precautionary Procedure . . . . . . . . . . . . . . . . . . . 21
Liquid Line Filter Drier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Puron Advance (R-454B) Refrigerant Charging . . . . . . . . . . . . . 22
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Sequence of Events - Dissipation Mode . . . . . . . . . . . . . . . . . . . 22
Start-up Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Decommissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
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Table of Contents
Related Manuals for Carrier 50NHB 024
Summary of Contents for Carrier 50NHB 024
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Page 1: Table Of Contents
A10165 Fig. 1 – 50NHB 024-036 Outdoor Fan Adjustment ....... 20 Electrical Controls and Wiring . -
Page 2: Safety Considerations
50NHB: Installation Instructions Safety Considerations WARNING This unit is equipped with electrically powered safety measures. For the safety measures to be effective, the unit must be electrically powered at PERSONAL INJURY AND PROPERTY DAMAGE all times after installation, other than when servicing. HAZARD WARNING For continued performance, reliability, and safety, the only approved... -
Page 3: Introduction
50NHB: Installation Instructions Introduction Do not place the unit where water, ice, or snow from an overhang or roof will damage or flood the unit. Do not install the unit on carpeting or This packaged heat pump is fully self-contained and designed for other combustible materials. - Page 4 50NHB: Installation Instructions 2. Avoid abrupt duct size increases and reductions. Abrupt change in 3 Factory Installed Screws duct size adversely affects air performance. (Must not be removed) IMPORTANT: Use flexible connectors between ductwork and unit to prevent transmission of vibration. Use suitable gaskets to ensure weather Remove 4 screws from left side tight and airtight seal.
- Page 5 50NHB: Installation Instructions A240410 Fig. 5 – Unit Base Dimensions, 024-036 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
- Page 6 50NHB: Installation Instructions A240411 Fig. 6 – Unit Base Dimensions, 042-060 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
- Page 7 50NHB: Installation Instructions INDOOR THERMOSTAT RETURN FROM TOP COVER POWER SOURCE POWER AND LOW-VOLTAGE DISCONNECT ENTRY PER NEC (UNIT AND COMPOSITE ELECTRIC RUST-PROOF HEATER) BASEPAN Power Wiring CONDENSATE DRAIN Control Wiring CONNECTION Condenser Airflow Evaporator Airflow A08207 Fig. 7 – Typical Installation Table 1 –...
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Page 8: Configuring Units For Downflow (Vertical) Discharge
50NHB: Installation Instructions Table 2 – Minimum Airflow for Safe Electric Heater Operation HP Unit Minimum Airflow (CFM) Size 5 kW 7.5 kW 10 kW 15 kW 20 kW 1200 1200 1200 1800 1200 1800 Step 7 – Install Electrical Connections X = Not Approved Combination Configuring Units for Downflow (Vertical) WARNING... -
Page 9: Routing Power Leads Into Unit
50NHB: Installation Instructions Routing Power Leads into Unit Routing Control Power Wires (24-V) Use only copper wire between disconnect and unit. The high-voltage Form a drip-loop with the thermostat leads before routing them into the leads should be in a conduit until they enter the unit; conduit termination unit. -
Page 10: Pre-Start-Up
50NHB: Installation Instructions Pre-Start-up Table 3 – Dissipation Board Test Button Functions Hold Button Time (sec) Function WARNING Dissipation Mode for 60 sec 5-29 Display flash code history Flash code 6 FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARD 3 rapid presses Clear flash code history Failure to follow this warning could result in personal injury or death and/or property damage. -
Page 11: Start-Up
50NHB: Installation Instructions dry powder or CO2 fire extinguisher shall be located near the refrigerant charge recovery area. BROWN 3. Potential ignition sources, including cigarette smoking, must not be used by the technician and must be kept far away from the unit site. 4. -
Page 12: Checking Cooling And Heating Control Operation
50NHB: Installation Instructions Step 2 – Start-Up Cooling and Make Adjustments occur. In this situation refrigerant must be evacuated and weighed in. See rating plate for charge quantity. Complete the required procedures given in the Pre-Start-Up section 7. Refer to Required Suction Tube Temp. Table (Table 5). - Page 13 50NHB: Installation Instructions Table 5 – Superheat Charging A240401 Table 6 – Required Subcooling A240412 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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Page 14: Fan Operation
50NHB: Installation Instructions Step 4 – Indoor Airflow and Airflow Adjustments Continuous Fan With the continuous indoor fan option selected on the thermostat, G is WARNING continuously energized. The continuous fan speed will be the same as the cooling fan speed. UNIT OPERATION HAZARD Demand Defrost Mode Failure to follow this caution may result in equipment damage or... - Page 15 50NHB: Installation Instructions A240413 Fig. 15 – Connection Electrical Diagram Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
- Page 16 50NHB: Installation Instructions A240414 Fig. 16 – Ladder Electrical Diagram Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
- Page 17 50NHB: Installation Instructions A190339 Fig. 17 – Accessory Electric Heater Wiring Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
- Page 18 50NHB: Installation Instructions Table 7 – Wet Coil Air Delivery* EXTERNAL STATIC PRESSURE (in. W.C.) UNIT SPEED SIZE COLOR DELIVERY† SCFM SCFM RED‡ SCFM 1015 SCFM 1060 1030 SCFM 1165 1130 1085 1045 1005 SCFM SCFM 1055 1005 RED‡ SCFM 1210 1175 1135...
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Page 19: Maintenance
50NHB: Installation Instructions Table 9 – Accessory Electric Heat Pressure Drop (IN. W.C.) HEATER kW 1000 1200 1400 1600 1800 2000 2200 5-20 0.033 0.037 0.042 0.047 0.052 0.060 0.067 0.075 Maintenance Inspect air filter(s) at least once each month and replace (throwaway-type) or clean (cleanable-type) at least twice during each To ensure continuing high performance, and to minimize the possibility cooling season and twice during the heating season if electric heat is... -
Page 20: Outdoor Coil, Indoor Coil, And Condensate Drain Pan
50NHB: Installation Instructions d. Remove the filler panel at the discharge end of the blower 5. When replacing fan blade, position blade as shown in Fig. housing by removing the two screws that fasten it to the housing. Tighten setscrews. e. -
Page 21: Indoor Airflow
50NHB: Installation Instructions If oil is detected or if low cooling performance is suspected, leak test all Table 10 – Compressor Type refrigerant tubing using an electronic leak detector, calibrated for use COMPRESSOR MANUFACTURER SUGGESTED UNIT with R-454B or liquid-soap solution. Ensure that the detector is not a TYPE OIL TYPE potential ignition source. -
Page 22: Liquid Line Filter Drier
50NHB: Installation Instructions 4. Perform required service. 5. Remove and dispose of any oil contaminated material per local codes. Liquid Line Filter Drier The filter drier is specifically designed to operate with Puron Advance (R-454B). Use only factory-authorized components. Filter drier must be replaced whenever the refrigerant system is opened. - Page 23 50NHB: Installation Instructions Table 11 – Troubleshooting Chart SYMPTOM CAUSE REMEDY Power failure Call power company Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker Defective contactor, transformer, control relay, or Compressor and outdoor fan Replace component high-pressure, loss- will not start of-charge or low-pressure switch...
- Page 24 50NHB: Installation Instructions Table 12 – Dissipation Board Status Code Descriptions A240111 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
- Page 25 50NHB: Installation Instructions Start-Up Checklist (Remove and Store in Job Files) I. PRELIMINARY INFORMATION MODEL NO.: ____________________________________ SERIAL NO.: ____________________________________ DATE: __________________________________________ TECHNICIAN: ___________________________________ II. PRESTART-UP (Insert check mark in box as each item is completed) ( ) VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT ( ) REMOVE ALL SHIPPING HOLD DOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS ( ) CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS ( ) CHECK THAT INDOOR (EVAPORATOR) AIR FILTER IS CLEAN AND IN PLACE...
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Page 26: Decommissioning
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