Carrier WeatherMaker 50TCQ07 - Single Point Boxes and Supplementary Fuses

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Not all available heater modules may be used in every unit.
Use only those heater modules that are UL listed for use in a
specific size unit. Refer to the label on the unit cabinet for the
list of approved heaters.
Unit heaters are marked with heater model numbers. But heat-
ers are ordered as and shipped in cartons marked with a corre-
sponding heater sales package part number. See Table 8 for
correlation between heater model number and sales package
part number.
NOTE: The value in position 9 of the part number differs between
the sales package part number (value is 1) and a bare heater model
number (value is 0).
Fig. 36 — Typical Access Panel Location
Fig. 37 — Typical Component Location
Fig. 38 — Typical Module Installation
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. 39. 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.
All fuses on 50TCQ 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.)
DISCONNECT MOUNTING
LOCATION
UNIT BLOCK-OFF
PANEL
OUTDOOR
ACCESS PANEL
INDOOR
ACCESS
PANEL
DISCONNECT
MOUNTING
LOCATION
EMT OR RIGID CONDUIT
(FIELD-SUPPLIED)
SINGLE
POINT BOX
CENTER
POST
HEATER
COVERS
HEATER
MOUNTING
BRACKET
HEATER
MODULE
(LOCATION 2)
HEATER
MODULE
(LOCATION 1)
SINGLE POINT
BOX
MOUNTING
SCREW
BRACKET AND
CONDUIT
DRIP BOOT
MAIN
CONTROL
BOX
CONTROL WIRE TERMINAL BLOCK
MANUAL RESET
LIMIT SWITCH
TRACK
FLANGE
Table 8 — Heater Model Number
BARE HEATER MODEL NUMBER C R H E A T E R 001 A/B 00
Heater Sales Package P/N
Includes:
Bare heater
Carton and packing materials
Installation sheet
CRHEATER
101 A/B 00