•The outdoor unit requires both power and control circuit electrical connections. Refer to the wiring diagram / schematic for identification and location of outdoor unit field wiring interfaces (Figure 11, page 17). Make all electrical connections in accordance with all applicable codes and ordinances.
•Overcurrent protection must be provided at the branch circuit distribution panel and sized as shown on the unit rating label and according to applicable local codes. See the unit rating plate for minimum circuit ampacity and maximum overcurrent protection limits.
•Provide power supply for the unit in accordance with the unit wiring diagram, and the unit rating plate. Connect the
•Use only copper wire for the line voltage power supply to this unit as listed in Table 1 (page 5). Use proper code agency listed conduit and a conduit connector for connecting the supply wires to the unit. Use of rain tight conduit is recommended.
•208/230 Volt units are shipped from the factory wired for 230 volt operation. For 208V operation, remove the lead from the transformer terminal marked 240V and connect it to the terminal marked 208V.
•Optional equipment requiring connection to the power or control circuits must be wired in strict accordance of the NEC (ANSI/NFPA 70), applicable local codes, and the instructions provided with the equipment.
Grounding
WARNING:
The unit cabinet must have an uninterrupted or unbroken electrical ground to minimize personal
injury if an electrical fault should occur. Do not use gas piping as an electrical ground!
This unit must be electrically grounded in accordance with local codes or, in the absence of local codes, with the National Electrical Code (ANSI/NFPA 70) or the CSA C22.1 Electrical Code. Use the grounding lug provided in the control box for grounding the unit.
| Recommended | |
Thermostat | Unit to | |
|
| |
Wire Gauge | ||
| ||
| (Heating) | (Heating/Cooling) |
|
|
|
24 | 55 | 25 |
|
|
|
22 | 90 | 45 |
|
|
|
20 | 140 | 70 |
|
|
|
18 | 225 | 110 |
|
|
|
Table 2. Thermostat Wire Gauge
Thermostat Connections
•Thermostat connections should be made in accordance with the instructions supplied with the thermostat and the indoor equipment.
•The outdoor unit is designed to operate from a 24 VAC
Class II control circuit. The control circuit wiring must comply with the current provisions of the NEC (ANSI/ NFPA 70) and with applicable local codes having jurisdiction.
•The low voltage wires must be properly connected to the units low voltage terminal block. Recommended wire gauge and wire lengths for typical thermostat connections are listed in Table 2.
•The thermostat should be mounted about 5 feet above the floor on an inside wall. DO NOT install the thermostat on an outside wall or any other location where its operation may be adversely affected by radiant heat from fireplaces, sunlight, or lighting fixtures, and convective heat from warm air registers or electrical appliances. Refer to the thermostat manufacturer’s instruction sheet for detailed mounting and installation information.
START UP & ADJUSTMENTS
Pre-Start Check List
√Verify the indoor unit is level and allows proper condensate drainage.
√Verify the outdoor coil and top of the unit are free from obstructions and debris, and all equipment access/ control panels are in place.
√Verify air filters are cleaned and properly installed.
√Verify duct work is sealed to prevent air leakage.
√Verify line voltage power leads are securely connected and the unit is properly grounded.
√Verify low voltage wires are securely connected to the correct leads on the low voltage terminal strip.
√Verify power supply branch circuit overcurrent protection is sized properly.
√Verify the thermostat is wired correctly.
Start-Up Procedures
The thermostat's function mode should be set to OFF and the fan mode should be set to AUTO. Close all electrical disconnects to energize the system.
Air Circulation - Indoor Blower
1.Set the thermostat system mode on OFF and the fan mode to ON.
2.Verify the blower runs continuously. Check the air delivery at the supply registers and adjust register openings for balanced air distribution. If insufficient air is detected, examine ductwork for leaks or obstructions.
3.Set the thermostat fan mode to AUTO and verify the blower stops running.
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