AMST Installation Manual

12
3568 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 479 12 14 21 28 35
CFM
HEAT KIT NOMINAL kW
220/1/60 SUPPLY VOLTAGE - TEMP. RISE °F

3568 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 579 12 15 22 30 37
2000 478 11 13 20 27 33
CFM
HEAT KIT NOMINAL kW
208/1/60 SUPPLY VOLTAGE - TEMP. RISE °F

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, PERSON-
AL INJURY OR DEATH.
WARNING
HIGH VOLTAGE!
TO AVOID PROPERTY DAMAGE, PERSONAL INJURY OR DEATH
DUE TO ELECTRICAL SHOCK, THIS UNIT MUST HAVE AN UNINTER-
RUPTED, 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 PER-
FORMED IN ACCORDANCE WITH THE NATIONAL ELECTRIC CODE
(NEC)/AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)/NA-
TIONAL 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.
• 󰀨
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.