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ELECTRIC HEATER PART NUMBER
EHK2-05B
EHK2-08B
EHK2-10B
Fan Coil Unit Size
18
24
30
36
L1
Field
Power
L2
Wiring
Field
Ground
Wiring
Fig. 2 - - 5- -kW, 7.5- -kW, 10- -kW Circuit Breaker
and Disconnect Heaters
Ground Connections
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
According to NEC, ANSI/NFPA 70, and local codes, cabinet
must have an uninterrupted or unbroken ground to minimize
personal injury if an electrical fault should occur. The ground
may consist of electrical wire or metal conduit when installed
in
accordance
with
existing
Ground/Conduit Note below.)
Table 1 – Accessory Heater Usage
SIZES USED WITH
18-36
18-36
18-36
Table 2 – Minimum CFM
EHK2-05B
325
450
575
700
Breaker box
locations
assembly
Unit sizes 18 & 24
Fig. 1 - - Installation Locations for EHK2 Heaters
Ground
Lug
A00077
electrical
codes.
(See
kW
5
7.5
10
EHK2-08B
350
475
600
725
Heater
locations
Unit sizes 30 & 36
NOTE:
Use UL- -listed conduit and conduit connector for
connecting supply wire(s) to unit to obtain proper grounding. If
conduit connection uses reducing washers, a separate ground wire
must be used. Grounding may also be accomplished by using
grounding lugs provided in control box.
Fan Speeds
Before operating unit, be sure that the proper blower speed has
been selected. Fan speeds are selected manually. (See Table 3)
To change the fan speed:
Factory default fan speed is medium; fan- -motor red wire
connected to fan relay No. 4.
For high speed, connect fan- -motor black wire to fan relay No. 4.
For low speed, connect fan- -motor blue wire to fan relay No. 4 and
fan- -motor red wire to fan relay No. 6.
Always connect the unused fan- -motor wire to the dummy terminal
block.
NOTE: Be sure that selected speed taps meet the minimum cfm
for cooling size and heater size.
Table 3 – Color Code for Motor Lead Wires
MOTOR SPEED TAP
Common
High
Medium
Low
2
INTERNAL CIRCUIT PROTECTION
Circuit Breaker
Circuit Breaker
Circuit Breaker
EHK2-10B
375
500
625
750
WIRE COLOR
Purple
Black
Red
Blue
A13079
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