Carrier WeatherMaster 50GC 04-06 Series, Installation Instructions Manual

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Fig. 33 — Typical Access Panel Location (3-5 Ton)
Fig. 34 — Typical Component Location
Fig. 35 — Typical Module Installation
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. 36. 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 Small Roof Top
Units Accessory Electric Heater and Single Point Box installation
instructions for details on tap connections on the field-installed
electric heat accessory.
All fuses on 50GC 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.)
Fig. 36 — Typical Single Point Installation
Low-Voltage Control Connections
Pull the low-voltage control leads from the heater module — VIO
and BRN (two of each if a two-circuit heater module is installed;
identify for circuit #1) — to the 4-pole terminal board TB4 located
on the heater bulkhead to the left of the Heater module. Connect
the VIO lead from Heater circuit #1 to terminal TB4-1. For 2 stage
heating, connect the VIO lead from Heater circuit #2 to terminal
TB4-2. See Fig. 37.
Fig. 37 — Accessory Electric Heater Control
Connections
HUMIDI-MIZER
®
CONTROL CONNECTIONS
Humidi-MiZer Space RH Controller
NOTE: The Humidi-MiZer system is a factory-installed option.
Humidi-MiZer system is not available for single phase (-3 voltage
code) models.
The Humidi-MiZer dehumidification system requires a field-sup-
plied and field-installed space relative humidity control device.
This device may be a separate humidistat control (contact closes
on rise in space RH above control setpoint) or a combination ther-
mostat-humidistat control device such as Carrier’s Edge
®
Pro
CONTROL BOX
ACCESS PANEL
INDOOR
ACCESS
PANEL
OPTIONAL
FACTORY-
INSTALLED
DISCONNECT
MAIN
CONTROL
BOX CENTER
POST VANE AXIAL
INDOOR FAN
SYSTEM SINGLE
POINT
BOX
HEATER
COVER CONTROL WIRE
TERMINAL BLOCK
MANUAL
RESET
LIMIT
SWITCH
HEATER
MOUNTING
BRACKET
HEATER
MODULE
CONTROL WIRING
FOAM POWER
WIRING HEATER
RELAY HEATER
MOUNTING SCREWS
VIO HR1 BRN
UCB
Field
Connections
HR1: Heater Circuit 1
HR2: Heater Circuit 2
(if two-circuit module installed)
2
3
C
1 3
PNK
ORN
ORN PNK BRN
VIO
BRN BRN VIO
2
TB4
VIO HR2 BRN
Elec Htr
TRAN 1