the
•Use only copper wire for the line voltage power supply to this unit as listed in Table 1. 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.
Thermostat / Low Voltage Connections
COPPER WIRE SIZE — AWG
(1% Voltage Drop)
| Supply Wire |
| Supply Circuit | |||
|
|
|
|
|
| Ampacity |
200 |
| 150 | 100 |
| 50 | |
|
|
| ||||
|
|
|
|
|
|
|
6 |
| 8 | 10 |
| 14 | 15 |
4 |
| 6 | 8 |
| 12 | 20 |
4 |
| 6 | 8 |
| 10 | 25 |
4 |
| 4 | 6 |
| 10 | 30 |
3 |
| 4 | 6 |
| 8 | 35 |
3 |
| 4 | 6 |
| 8 | 40 |
2 |
| 3 | 4 |
| 6 | 45 |
2 |
| 3 | 4 |
| 6 | 50 |
2 |
| 3 | 4 |
| 6 | 55 |
1 |
| 2 | 3 |
| 4 | 60 |
Wire Size based on N.E.C. for 60° type copper conductors.
Table 1. Copper Wire Size
| 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 should be made in accordance |
with the instructions supplied with the thermostat and |
the indoor equipment. A typical installation with a heat |
pump thermostat and air handler is shown in Figure 2. |
• 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 |
NOTE: Jumper
W1 & W2 together for shorter staging time.
Y1
W2
W1
O
Y/Y2
G R C
Thermostat
G R W2 C E O Y1 Y2 W1 W3
R
W2
OD
E Stat
C O Y1 Y2
information. |
Outdoor Fan Motor
If the unit utilizes a
Air Handler Heat Pump OD Section
Figure 2. Typical 2 - Stage Heat Pump w/ Optional Outdoor Thermostat and Variable Speed Air Handler
5