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Single Point Boxes and Supplementary Fuses
When the unit MOCP device value exceeds 60-A, unit-mount-
ed supplementary fuses are required for each heater circuit.
These fuses are included in accessory single point boxes, with
power distribution and fuse blocks. The single point box will
be installed directly under the unit control box, just to the left
of the partition separating the indoor section (with electric
heaters) from the outdoor section. The single point box has a
hinged access cover. See Fig. 34. The single point box also in-
cludes 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 connections on the
field-installed electric heat accessory.
All fuses on 50HCQA units are 60-A. (Note that all heaters are
qualified 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 in-
structions 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. 34 — Typical Single Point Installation
T
E
R
0
T
E
R
1
20
0
1
A
0
0
1
A
0
0
0
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