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NATIONAL
®
COMFORT
PRODUCTS
HEATING & A/C EQUIPMENT
Thru-The-Wall Heat Pumps
Installation
Guide
Split-System
Heat Pumps
This unit should
be installed in an
OUTSIDE WALL FOR
THRU-THE-WALL
INSTALLATION ONLY!
NHPA
Series:
All Units Department of Energy Listed
3000
Please read the entire installation guide before starting the installation.
National Comfort Products
®
A Division of National Refrigeration & Air Conditioning Products, Inc.
539 Dunksferry Road • Bensalem, PA 19020 • (215) 244-1400 • 1-800-523-7138 • Fax: (215) 639-1674
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Table of Contents
Summary of Contents for National Comfort Products NHPA 3000 Series
- Page 1 All Units Department of Energy Listed 3000 Please read the entire installation guide before starting the installation. National Comfort Products ® A Division of National Refrigeration & Air Conditioning Products, Inc. 539 Dunksferry Road • Bensalem, PA 19020 • (215) 244-1400 • 1-800-523-7138 • Fax: (215) 639-1674...
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Page 2: Table Of Contents
Maintenance, Checkout Procedure ........Page 13 Important! Before Removing a Warranty Compressor..Page 14 Wiring Diagrams..............Page 15 Specifications, Dimensional Drawings.........Page 16 Replacement Parts - NHPA 3000 Series.......Page 17 Noise, Insulated Sound Cover..........Page 18 Engineering Specifications Guide .........Page 19 Warranty................Page 20 IMPORTANT NOTE: DO NOT DESTROY OR THROW AWAY THIS MANUAL. -
Page 3: Safety First
Installation Guide for NHPA Split-System Heat Pumps Safety First! WARNING HIGH VOLTAGE! Disconnect ALL power before serving. Multiple power sources may be present. Failure to do so may result in property damage, personal injury or death. WARNING Installation and repair of this unit should be performed ONLY by individuals meeting the requirements of an “entry level technician”... -
Page 4: Before You Start
*Less than 12” Self-equalizing components are required to reduce compressor Call National Comfort Products starting problems. If self-equalizing components are not used, field installed hard start kits will be required. Hard start kits MUST be compatible with compressors. -
Page 5: Unit Location Considerations
Installation Guide for NHPA Split-System Heat Pumps Unit Location Considerations kitchen vents, steam vents or corrosive fumes could come in contact with coil side of unit. In thru-the-wall installation, due to the various types of wall 9. 30" clearance is required for service accessibility on the inside construction, it is not possible to provide detailed instructions. - Page 6 Installation Guide for NHPA Split-System Heat Pumps *Call National Comfort Products Note: Take precautions to prevent noise for Greater Line Lenghts within the building structure due to vibration transmission from the refrigerant lines (Some examples provided below). For example: • When the refrigerant lines have to be fastened to floor joists or other framing in a structure, use isolation type hangers.
- Page 7 Installation Guide for NHPA Split-System Heat Pumps 1. The unit has internally mounted service valves. Field tubing Step 3: may be routed through the locations provided in either the top or rear flange. Care should be taken not to block access to internal components.
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Page 8: Leak Checking
Installation Guide for NHPA Split-System Heat Pumps b. Provide a heat sink at the service valve such as wrapping a wet rag around it, to prevent damage during the brazing operation c. Braze the liquid line to the service valve. Allow the nitrogen to keep flowing when brazing the refrigerant line until all brazed joints are completed. -
Page 9: Evacuation, Electrical Connections
Installation Guide for NHPA Split-System Heat Pumps Evacuation circulating path of room air. Avoid locations where the thermostat would be exposed to cold air infiltration; drafts from windows, doors or other openings leading to the outside; exposure to air 1. Connect the vacuum pump to the service ports of the liquid line and the vapor line service valves. -
Page 10: High Voltage And Power Supply
Installation Guide for NHPA Split-System Heat Pumps High Voltage Power Supply Start Up 1. Ensure Sections 7 through 12 have been completed. Check numbers once done. WARNING 2. Turn on disconnect(s) to apply power to all equipment. 3. Wait one (1) hour before starting the unit if compressor LIVE ELECTRICAL COMPONENTS! crankcase heater accessory is used and the Outdoor Ambient is During installation, testing, servicing... - Page 11 Installation Guide for NHPA Split-System Heat Pumps in the pan. The condensate pan under the coil must be piped Note: It is important to return in the spring or summer to per item number 12 under the “Unit Location Considerations” accurately charge the system in the cooling mode when outdoor section of this manual.
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Page 12: Refrigerant Charging
Installation Guide for NHPA Split-System Heat Pumps Line Sets be used. If the old line sets are to be used, they MUST Refrigerant Charging be flushed with a commercial flushing agent. R410A refrigerant oil, is not compatible with R-22 oil. The indoor coil MUST be The heat pump comes from the factory pre-charged replaced and a TXV MUST be used. -
Page 13: Maintenance, Checkout Procedure
Installation Guide for NHPA Split-System Heat Pumps Checkout Procedures and Air Flow Chart Troubleshooting 3000 Series CHECKOUT PROCEDURE Model Air Handler Static NHPA-418 NCPAH-24-A After installation has been completed, it is recommended that the system be checked against the following list: NHPA-424 NCPAH-24-A ... -
Page 14: Important! Before Removing A Warranty Compressor
Installation Guide for NHPA Split-System Heat Pumps IMPORTANT!!! BEFORE REMOVING A WARRANTY COMPRESSOR, PLEASE FILL OUT THE FOLLOWING AND CALL (800) 523-7138. REMOVAL OF COMPRESSOR WITHOUT FACTORY VERIFICATION CAN LEAD TO WARRANTY CREDIT BEING DENIED Incoming Voltage to Compressor at Contactor is:__________Volts Compressor Starting AMP Draw:__________ Ω... -
Page 15: Wiring Diagrams
Installation Guide for NHPA Split-System Heat Pumps... -
Page 16: Specifications, Dimensional Drawings
Installation Guide for NHPA Split-System Heat Pumps SPECIFICATIONS CHART - 3000 SERIES MODEL NO. NHPA-418 NHPA-424 DIMENSIONS 24 1/8” 24 1/8” Width Service 32” 32” Height Clearance 30" 18 1/2” 18 1/2” Length 3/8” 3/8” Liquid Valve 3/4” 3/4” Vapor Valve NOMINAL COOLING 18,200 22,200... -
Page 17: Replacement Parts - Nhpa 3000 Series
Installation Guide for NHPA Split-System Heat Pumps REPLACEMENT PARTS GUIDE NHPA 3000 SERIES ITEM DESCRIPTION NHPA-418 NHPA-424 ITEM DESCRIPTION NHPA-418 NHPA-424 Contactor Rev. Valve Solenoid 14262082 14262082 14206027 14206027 Rev. Valve 14225376 14225375 14206031 14206031 Dual Capacitor 30-5 mFd /... -
Page 18: Noise, Insulated Sound Cover
Installation Guide for NHPA Split-System Heat Pumps Service Access 30” of clearance is required for service accessibility on the inside. All units are serviceable from the inside. Noise We design our unit as quiet as possible; please keep in mind when locating the unit that it does make noise. Use common precautions as you would for other mechanical appliances pertaining to noise. -
Page 19: Engineering Specifications Guide
THRU-THE-WALL CONDENSING UNIT & HEAT PUMP LIMITED WARRANTY 1. National Comfort Products warrants to its customers that its product shall be free from defects in material and workmanship under normal use and regular service and maintenance as follows: COMPRESSORS: For five years from the date of original installation. -
Page 20: Warranty
Installation Guide for NHPA Split-System Heat Pumps The term “consequential damages” shall include, but not be limited to, loss of anticipated profits, business interruption, loss of use, revenue, reputation and data, costs incurred, including without limitation, for capital, fuel, power and loss or damage to capital or equipment. - Page 21 Capacities 7. Sales 1 ½ & 2 ton for heat pumps National Comfort Products condensing units and matched Materials air handlers are dealt thru a variety of wholesalers. Contact the factory to help locate a nearby distributor for price and...
- Page 22 Installation Guide for NHPA Split-System Heat Pumps NOTES ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________...
- Page 23 Installation Guide for NHPA Split-System Heat Pumps NOTES ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________...
- Page 24 NATIONAL ® COMFORT PRODUCTS HEATING & A/C EQUIPMENT National Comfort Products 539 Dunksferry Road | Bensalem, PA 19020-5908 (800) 523-7138 Fax (215) 638-1674 Installation Guide NHPA Heat Pump 14299144 7/2016...