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Single Point Boxes and Supplementary Fuses
When the unit MOCP device value exceeds 60-A, unit-mounted
supplementary fuses are required for each heater circuit. These
fuses are included in accessory single point boxes, with power dis-
tribution and fuse blocks. The single point box will be installed di-
rectly under the unit control box, just to the left of the partition
separating the indoor section (with electric heaters) from the out-
door section. The single point box has a hinged access cover. See
Fig. 35. The single point box also includes a set of power taps and
pigtails to complete the wiring between the single point box and
the unit's main control box terminals. Refer to the accessory heater
and single point box installation instructions for details on tap con-
nections on the field-installed electric heat accessory.
All fuses on 549J units are 60-A. (Note that all heaters are quali-
fied for use with a 60-A fuse, regardless of actual heater ampacity,
so only 60-A fuses are necessary.)
Single Point Boxes without Fuses
Refer to accessory heater and single point box installation instruc-
tions for details on tap connections.
BARE HEATER
C
MODEL NUMBER
Heater Sales Package
P/N includes:
Bare Heater
C
Carton and packing
materials
Installation sheet
Table 5 — Heater Model Number
R
H
E
A
R
H
E
A
CONTROL
BOX
BUSHING
SINGLE
POINT BOX
MOUNTING
SCREWS
DRIP BOOT
BRACKET
MOUNTING
SCREWS
POWER
WIRES
FOAM
BUSHING
HEATER
RELAYS
HEATER
MOUNTING
SCREWS
Fig. 35 — Typical Single Point Installation
T
E
R
0
T
E
R
1
22
0
1
A
0
0
1
A
0
0
0
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