Literature Library 913549A 10 SEER Air Conditioner and Heat Pump Instruction Manual
- June 16, 2024
- Literature Library
Table of Contents
Literature Library 913549A 10 SEER Air Conditioner and Heat Pump
Product Information
Air Conditioner and Heat Pump
Specifications:
- R22 Models: 913549A (10 SEER), 918359 (12 and 13 SEER)
- R-410 Models : 918837 (12 through 15 SEER)
Introduction:
The Air Conditioner and Heat Pump is a high-quality appliance designed for
heating and cooling purposes. These installation instructions are intended for
qualified individuals who have experience in installing heating and air
conditioning appliances. It is important to read these instructions thoroughly
and follow all warnings and cautions to ensure safe and proper installation.
Improper installation, service, adjustment, or maintenance can lead to
personal injury or property damage.
Installation Sequence:
Warning: To avoid the risk of electric shock, personal injury, or death,
disconnect the electrical power to the unit before performing any maintenance
or service. The unit may have more than one electric power supply.
- Read these installation instructions completely before proceeding.
- Disconnect all power to the unit.
- Remove the service panel located at the front of the unit to access the control box, which contains electrical control components.
- Remove the front panel with the service ports and drain tube opening from the unit.
- Locate the service valves inside the unit. For a single system, locate the 1/2 diameter compressor discharge line service valve. For a split system, locate the high side 3/8 service valve.
- Mount the provided pressure switch onto the port of the provided service adapter without a valve core. Tighten it securely. Remove the cap from the unit’s service valve. Mount the service adapter tee and switch assembly onto the service valve and tighten it. Replace the cap on the service port of the adapter tee that includes a valve core.
- Route the two wire leads from the pressure switch through the wire grommet at the top of the panel separating the compressor from the control box.
For Air Conditioners:
- Remove the fan motor common lead (black wire) from T2 on the contactor.
- Connect the two black wires to terminals #1 and #3 on the relay. Route the wires through the low voltage divider. Connect one black wire to O on the defrost board. Connect the other black wire to 24V common (C on the defrost board)
- Connect the Y adapter terminal, provided with the kit, to terminal #4 of the relay.
- Remove the black outdoor fan motor wire from DF2 on the defrost board and connect it to the adapter on terminal #4 of the relay.
- Connect the piggyback end of the white wire to terminal #5 of the relay and connect the other end to DF2 on the defrost board.
- Using the wire splice provided, connect one lead from the pressure switch to the fan motor lead.
- Connect the other pressure switch lead to T2 on the contactor. (See Figure 1 )
- Connect one wire lead from the pressure switch to terminal #5 of the relay and the other to terminal #4 of the relay.
FAQ:
-
Q: What are the models available for the Air Conditioner and Heat Pump?
A: The R22 models include 913549A (10 SEER) and 918359 (12 and 13 SEER). The R-410 models include 918837 (12 through 15 SEER). -
Q: What precautions should I take during installation?
A: Before starting the installation, disconnect all power to the unit to avoid the risk of electric shock. Additionally, make sure to read the entire installation instructions thoroughly and follow all warnings and cautions. -
Q: Can I install the Low Ambient Control Kit myself?
A: These instructions are primarily intended for qualified individuals experienced in the proper installation of heating and/or air conditioning appliances. If you are not familiar with the installation process, it is recommended to seek professional assistance.
Air Conditioner and Heat Pump
Installation Instructions
- Low Ambient Control Kit
- R22: 913549A 10 SEER Models
- 918359 12 and 13 SEER Models
- R-410: 918837 12 through 15 SEER Models
INTRODUCTION
- These instructions are primarily intended to assist qualified individuals experienced in the proper installation of heating and/or air conditioning appliances. Before beginning the installation, read these instructions thoroughly and follow all warnings and cautions in the instructions and on the unit. Improper installation, service, adjustment or maintenance can cause explosion, fire, electrical shock or other conditions which may result in personal injury or property damage.
- The Low Ambient Control Kit is designed for use in air-conditioner and heat pump products. The kit consists of a pressure switch, a service adapter tee, a 24V relay for heat pump applications, and miscellaneous parts for mounting. The kit is intended to maintain system pressures at normal levels should cooling be required at low outdoor temperatures. The pressures are controlled by a pressure switch that cycles the outdoor fan motor. When the liquid pressure drops below the designated pressure setting, the fan motor is switched off. If the liquid pressure then rises above the recommended pressure setting, the fan motor is switched on again.
INSTALLATION SEQUENCE
WARNING:
To avoid risk of electric shock, personal injury, or death, disconnect
electrical power to the unit before performing any maintenance or service. The
unit may have more than one electric power supply.
The installation sequence is as follows:
-
Read these installation instructions completely before proceeding proceeding.
-
Disconnect all power to the unit.
-
At the front of the unit remove the service panel to the control box. This will have all of the electrical control components within and in the case of the R4 units the gas control components as well.
-
Remove the front panel with the service ports and drain tube opening from the unit.
-
There are two service valves in the interior of the unit. Locate the one in the 1/2” diameter compressor discharge line. In the case of a split system, locate the 3/8” service valve (high side).
-
Mount the provided pressure switch onto the port of provided service adapter that does not have valve core and tighten. Remove the cap from the units service valve. Mount the service adapter tee and switch assembly onto the service valve and tighten. Onto the service port of adapter tee that includes a valve core, replace the cap.
-
Route the two wire leads from the switch through the wire grommet at the top of the panel separating the compressor from the control box.
A. For Air Conditioners -
Remove the fan motor common lead from “T2” on the contactor (black wire).
-
Using wire splice provided connect one lead from the pressure switch to the fan motor lead.
-
Connect the other pressure switch lead to “T2” on the contactor. (See Figure 1)
B. For Heat Pumps -
Mount the relay provided in the control box, near the low-voltage compartment.
-
Connect the two black wires to terminals #1 and #3 on the relay and route the wires through the low-voltage divider. Connect one black wire to “O” on the defrost board.
Connect the other black wire to 24V common (“C” on the defrost board). -
Connect the “Y” adapter terminal, provided with the kit, to terminal #4 of relay.
-
Remove the black outdoor fan motor wire from “DF2” on the defrost board and connect it to the adapter on terminal #4 of relay.
-
Connect the piggyback end of the white wire to terminal #5 of relay and connect the other end to “DF2” on the defrost board.
-
Connect one wire lead from the pressure switch to terminal #5 of relay and the other to terminal #4 of relay.
-
Tie all wires back as needed.
-
Replace the service panels removed in Steps #2 through #5.
-
Restore power to the unit.
Figure 2. Heat Pump Low Ambient Control Kit Wiring Diagram
Specifications & illustrations subject to change without notice or incurring
obligations (08/23). O’Fallon, MO, © Nortek Global HVAC LLC 2023. All Rights
Reserved.
708175D
(Replaces 708175C)
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