Instructions / Assembly

12
3568101519/2025
800 1017212833
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 10141725 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 6
12 Electrical and Control Wiring
IMPORTANT: All routing of electrical wiring must be made
through provided electrical knockouts. Do not cut, punc-
ture or alter the cabinet for electrical wiring.
HIGH VOLTAGE!
Failure to do so may cause property damage,
personal injury or death.
Disconnect ALL power before servicing.
Multiple power sources may be present.
HIGH VOLTAGE!
To avoid property damage, personal injury or death
due to electrical shock, this unit MUST have an
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.
uninterrupted, unbroken
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 equip-
ment. Use the following check list when selecting the
appropriate wire size for your unit.
• Wire used must carry the Minimum Circuit Ampac-
ity (MCA) listed on the unit’s Series and Rating Plate.
• Refer to the NEC (USA) or CSA (Canada) for wire siz-
ing. The unit MCA for the air handler and the op-
tional electric heat kit can be found on the unit Se-
ries and Rating Plate.
• Wire must be sized to allow no more than a 2% volt-
age drop from the building breaker/fuse panel to
the unit.
• Wires with different insulation temperature rating
have varying ampacities - be sure to check the tem-
perature 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 pro-
vides 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.