Carrier 50HCQ12, Руководство по установке

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Fig. 39 — Typical Component Location
Single Point Boxes
When heaters are installed, power wiring to both heaters and the
rest of the unit is connected via the single point box accessory,
which 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. 40. The single point box also in -
cludes 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.
Fig. 40 — Typical Single Point Installation
Heater 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
distribution and fuse blocks.
All fuses on 50HCQ units are 60-A. (Note that all heaters are qual -
ified for use with a 60-A fuse, regardless of actual heater ampacity,
so only 60-A fuses are necessary.)
Heater Low-Voltage Control Connections
One or two heaters can be installed in the unit. Use the wiring pro -
cedure listed below for each heater as determined by the number
of stages in the heater.
Single Stage Heaters
Single-stage heaters will have an orange and a brown control wire.
Connect these to the orange and brown wires located on TB4.
Two Stage Heaters
Two-stage heaters will have orange, purple, red and brown wires.
The orange and the purple are the control wires and the red and
brown wires feed the safety circuit. Connect both the orange and
the purple wires to the orange wire locations of TB4. Connect the
red and brown wires to red and brown wires on TB4. If more than
one heater is installed, repeat the wiring procedure for the second
heater. The 3 locations across the top of TB4 do allow a switch to
be installed in series with some of the heaters in order to add addi -
tional heater control.
See Fig. 41 for additional details.
CONTROL AND POWER WIRING DIAGRAMS
Figures 42-45 are typical control and power wiring diagrams.
HEATER
MOUNTING
BRACKET HEATER
MODULE
(LOCATION 2) HEATER
MODULE
(LOCATION 1) SINGLE POINT
BOX
MOUNTING
SCREW
SINGLE
POINT BOX HEATER
COVERS MANUAL RESET
LIMIT SWITCH
DISCONNECT
MOUNTING
LOCATION
ALLIED PA
MODEL NO.
ERIAL NO.
CORP.
OD
22.2
3
1
23
ISTED AIR
NDITIONING
UIP ACCESS
346N .
P / N 2-
5610-4 REV
1
1
1
3
2
1
2 3
CONTROL
BOX
BUSHING
SINGLE
POINT BOX
MOUNTING
SCREWS
FOAM
BUSHING
DRIP BOOT
BRACKET
MOUNTING
SCREWS
HEATER
RELAYS
POWER
WIRES
HEATER
MOUNTING
SCREWS