12
3
5
6
8
10
15 19/20 25
800
11
18
22
30
35
1000
9
14
18
24
28
42
1200
7
12
15
20
24
35
47
59
1400
6
10
13
17
20
30
40
51
1600
6
9
11
15
18
27
35
44
1800
5
8
10
13
16
24
31
39
2000
4
7
9
12
14
21
28
35
CFM
HEAT KIT NOMINAL kW
220/1/60 SUPPLY VOLTAGE - TEMP. RISE °F
Table 8
3
5
6
8
10
15 19/20 25
800
10
17
21
28
33
1000
8
13
17
22
27
40
1200
7
11
14
19
22
33
45
56
1400
6
10
12
16
19
29
38
48
1600
5
8
10
14
17
25
33
42
1800
5
7
9
12
15
22
30
37
2000
4
7
8
11
13
20
27
33
CFM
HEAT KIT NOMINAL kW
208/1/60 SUPPLY VOLTAGE - TEMP. RISE °F
Table 9
12 Electrical and Control Wiring
IMPORTANT: All routing of electrical wiring must be
made through provided electrical knockouts. Do not
cut, puncture or alter the cabinet for electrical wiring.
WARNING
HIGH VOLTAGE
Disconnect ALL power before servicing or
installing this unit. Multiple power sources
may be present. Failure to do so may cause
property damage, personal injury or death.
WARNING
HIGH VOLTAGE!
To avoid property damage, personal injury or death due to
electrical shock, this unit MUST have an uninterrupted,
unbroken electrical ground. The electrical ground
circuit may consist of an appropriately sized electrical
wire connecting the ground lug in the unit control box
to the building electrical service panel. Other methods
of grounding are permitted if performed in accordance
with the National Electric Code (NEC)/American National
Standards Institute (ANSI)/National Fire Protection
Association (NFPA) 70 and local/state codes. In Canada,
electrical grounding is to be in accordance with the
Canadian Electric Code (CSA) C22.1.
12.1 Building Electrical Service Inspection
This unit is designed for single-phase electrical supply
only. DO NOT OPERATE ON A THREE-PHASE POWER
SUPPLY. Measure the power supply to the unit. The
supply voltage must be measured and be in agreement
with the unit nameplate power requirements and within the
range shown.
12.2 Wire Sizing
Wire size is important to the operation of your equipment.
Use the following check list when selecting the appropriate
wire size for your unit.
• Wire used must carry the Minimum Circuit Ampacity
(MCA) listed on the unit’s Series and Rating Plate.
• Refer to the NEC (USA) or CSA (Canada) for wire
sizing. The unit MCA for the air handler and the
optional electric heat kit can be found on the unit
Series and Rating Plate.
• Wire must be sized to allow no more than a 2%
voltage drop from the building breaker/fuse panel to
the unit.
•
Wires with different insulation temperature rating
have varying ampacities - be sure to check the
temperature rating used.
Refer to the latest edition of the National Electric Code or in
Canada the Canadian Electric Code when determining the
correct wire size.
12.3 Maximum Overcurrent Protection (MOP)
Every installation must include an NEC (USA) or CEC
(Canada) approved overcurrent protection device. Also,
check with local or state codes for any special regional
requirements.
Protection can be in the form of fusing or HACR style
circuit breakers. The Series and Rating Plate provides the
maximum overcurrent device permissible.
NOTE: Fuses or circuit breakers are to be sized larger
than the equipment MCA but not to exceed the MOP.
