Humidi-Mizer® Control Connections - Carrier WeatherMaster 50GC 04-06 Series Installation Instructions Manual

Fig. 33 — Typical Access Panel Location (3-5 Ton)
OPTIONAL
MAIN SINGLE
FACTORY-
POINT
INSTALLED CONTROL
DISCONNECT BOX BOX
CONTROL WIRE
TERMINAL BLOCK
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.)
INDOOR
ACCESS
PANEL
CONTROL BOX
ACCESS PANEL
CENTER VANE AXIAL
POST INDOOR FAN
SYSTEM
MANUAL
RESET
LIMIT
SWITCH
HEATER
HEATER
MOUNTING
COVER
BRACKET
HEATER
MODULE
CONTROL WIRING
FOAM POWER
WIRING
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.
UCB
2 PNK
3 ORN
TRAN 1
C
ORN
TB4
VIO
Field
Connections
Fig. 37 — Accessory Electric Heater Control
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
19
HEATER HEATER
RELAY MOUNTING SCREWS
PNK BRN
1 2 3
VIO BRN BRN
Elec Htr
VIO HR2 BRN
VIO HR1 BRN
HR1: Heater Circuit 1
HR2: Heater Circuit 2
(if two-circuit module installed)
Connections
Pro
®