13
4.0 ELECTRICAL WIRING
Field wiring must comply with the National Electric Code (C.E.C. in Canada) and any
applicable local ordinance.
4.1 POWER WIRING
It is important that proper electrical power is available for connection to the unit model
being installed. See the unit nameplate, wiring diagram and electrical data in the installa-
tion instructions.
• If required, install a branch circuit disconnect of adequate size, located within sight of,
and readily accessible to the unit.
• IMPORTANT: After the Electric Heater is installed, units may be equipped with one,
two, or three 60 amp. circuit breakers. These breaker(s) protect the internal wiring in
the event of a short circuit and serve as a disconnect. Circuit breakers installed within
the unit do not provide over-current protection of the supply wiring and therefore may
be sized larger than the branch circuit protection.
• Supply circuit power wiring must be 75°C minimum copper conductors only. See
Electrical Data in this section for ampacity, wire size and circuit protector requirement.
Supply circuit protective devices may be either fuses or “HACR” type circuit breakers.
• Power wiring may be connected to either the right, left side or top. Three
7
/
8
”, 1
3
/
32
”,
1
31
/
32
” dia. concentric knockouts are provided for connection of power wiring to unit.
• Power wiring is connected to the power terminal block(s) in unit control compartment.
4.2 GROUNDING
• Grounding may be accomplished by grounding metal conduit when installed in accor-
dance with electrical codes to the unit cabinet.
• Grounding may also be accomplished by attaching ground wire(s) to ground lug(s)
provided in the unit wiring compartment.
• Ground lug(s) are located close to wire entrance on left side of unit (upflow). Lug(s)
may be moved to marked locations near wire entrance on right side of unit (upflow), if
alternate location is more convenient.
• Use of multiple supply circuits require grounding of each circuit to lug(s) provided in
unit.
IMPORTANT: Not all heater kits are supplied with a means of electrical disconnect. If
circuit breakers are supplied with a heater kit, the circuit breakers are NOT rated for cir-
cuit protection.
!
WARNING
The unit must be permanently grounded. Failure to do so can result in electri-
cal shock causing personal injury or death.
!
WARNING
Disconnect all power to unit before installing or servicing. More than one dis-
connect switch may be required to de-energize the equipment. Hazardous volt-
age can cause severe personal injury or death.
S
U
P
P
L
Y
W
I
R
E
L
E
N
G
T
H
F
E
E
T
SUPPLY CIRCUIT AMPACITY
NOTE: WIRE BASED ON COPPER CONDUCTORS 75°C MINIMUM RATING.
FOR MORE THAN 3 CONDUCTORS IN A RACEWAY OR CABLE, SEE
N.E.C. FOR DERATING THE AMPACITY OF EACH CONDUCTOR.
12
12
14
14
15
10
10
12
12
20
8
10
10
10
25
8
10
10
10
30
8
8
8
8
35
6
8
8
8
40
6
6
8
8
45
6
6
6
6
50
4
6
6
6
60
4
4
4
4
70
3
4
4
4
80
3
3
3
3
90
2
3
3
3
100
2
2
2
2
110
1
1
1
1
125
0
0
0
0
150
00
00
00
00
175
4.3 COPPER WIRE SIZE - AWG. (3% VOLTAGE DROP)
200 [61]
150 [46]
100 [30]
50 [15]
4.4 BLOWER MOTOR ELECTRICAL DATA
2421
1/3
208/230
1
60
300-1100
1.7
4.0
15
3621
1/2
208/230
1
60
300-1100
3.4
6.0
15
4824
3/4
208/230
1
60
300-1100
4.9
9.0
15
6024
3/4
208/230
1
60
300-1100
4.9
9.0
15
RHPL-HM
HP
Voltage
Phase
Hertz
RPM
Circuit
AMPS
Minimum
Circuit
Ampacity
Max. Circuit
Protector
Summary of Contents for RHPL-HM2421JC
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