Carrier 50HC Series, Руководство по установке, Страница: 22 / 52

22
Fig. 41 — Accessory Electric Heater Control
Connections (All Units Except Size 06, 575V),
2 Stage Heat Shown
Size 06, 575V units only:
Pull the low-voltage control leads from the heater module(s) —
VIO, WHT and BRN (two of each if two modules are installed;
identify for Module #1) — to the 4-pole terminal board TB4 locat-
ed on the heater bulkhead to the left of Heater #1. Connect the
WHT lead from Heater #1 to TB4 where ORN is. For 2 stage
heating, connect the VIO lead from Heater #2 to the terminal that
has VIO from the unit. For 1 stage heating with 2 heater modules,
connect the VIO lead from Heater #2 to the same terminal with
WHT lead from Heater #1 (see Fig. 42).
Fig. 42 — Accessory Electric Heater Control
Connections (Size 06, 575V Only),
2 Stage Heat Shown
HUMIDI-MIZER ® CONTROL CONNECTIONS
Humidi-MiZer Space RH Controller
NOTE: The Humidi-MiZer system is a factory-installed option
which is only available for units equipped with belt-drive motors.
The 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
Thermidistat™ with isolated contact set for dehumidification con-
trol. See Fig. 43 and Fig. 44. The humidistat is normally used in
applications where a temperature control is already provided
(units with PremierLink™ control).
Fig. 43 — Accessory Field-Installed Humidistat
Fig. 44 — Edge ® Pro Thermidistat
Connecting the Carrier Humidistat (HL38MG029)
1. Route the humidistat 2-conductor cable (field-supplied)
through the hole provided in the unit corner post.
2. Feed wires through the raceway built into the corner post (see
Fig. 36) to the 24-v barrier located on the left side of the con-
trol box. The raceway provides the UL-required clearance
between high-voltage and low-voltage wiring.
3. Use wire nuts to connect humidistat cable to two PINK leads
in the low-voltage wiring as shown in Fig. 45.
HR1: On Heater 1 in Position #1
HR2: On Heater 2 in Position #2 (if installed)
2
3
12
1 3 2 TB4
HR2
HR1
Elec Htr
CONTL
BOARD
CTB
Field
Connections
for Field-Installed
Electric Heat
VIO BRN BRN VIO
VIO BRN
VIO BRN
ORN
BRN
VIO
ORN VIO BRN
CONTROL
BOARD
2
12
3
TO 24V TRANS
ORN
VIO
RED
BRN
BRN
BRN
RED
VIO
WHT
LS
HCR2
HCR1
HC2
HC1
Field Connections
for Field Installed
Electric Heat
TB4
% RELATIVE HUMIDITY
®