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FIELD CONTROL WIRING — Install a Carrier-approved
accessory thermostat assembly according to installation
instructions included with the accessory. Locate thermostat
assembly on a solid wall in the conditioned space to sense aver-
age temperature in accordance with thermostat installation
instructions.
NOTE: If using Carrier electronic thermostat, set thermostat
configuration for "non-heat pump operation." The use of the O
terminal is not required to energize the reversing valve in this
family of products.
Route thermostat cable or equivalent single leads of colored
wire from subbase terminals to low-voltage connections on
unit (shown in Fig. 7) as described in Steps 1 through 3 below.
NOTE: For wire runs up to 50 ft, use no. 18 AWG (American
Wire Gage) insulated wire (35 C minimum). For 50 to 75 ft,
use no. 16 AWG insulated wire (35 C minimum). For over
75 ft, use no. 14 AWG insulated wire (35 C minimum). All
wire larger than no. 18 AWG cannot be directly connected to
the thermostat and will require a junction box and splice at the
thermostat.
1. Connect thermostat wires to screw terminals of low volt-
age connection board.
2. Pass the control wires through the hole provided in the
corner post.
3. Feed wire through the raceway built into the corner post
to the 24-v barrier located on the left side of the control
box. See Fig. 8. The raceway provides the UL-required
clearance between the high- and low-voltage wiring.
DEFROST BOARD — The defrost board timer is set for a
30 minute defrost cycle from the factory. To adjust to a 50 or
90 minute cycle, remove the wire connected to the 30 minute
quick connect on the defrost board. See Fig. 9. Connect lead to
the 50 or 90 minute quick connect on the defrost board, de-
pending on the application.
HEAT ANTICIPATOR SETTINGS — Set first-stage heat
anticipator setting at 0.8 and set second-stage heat anticipator
setting at 0.3.
LEGEND
AHA
— Adjustable Heat Anticipator
CC
— Cooling Compensator
Field Wiring
Factory Wiring
Fig. 7 — Low-Voltage Connections With or
Without Economizer or Two-Position Damper
†
*Used with economizer.
†Used with 2-stage electric
heater.
Fig. 8 — Field Control Wiring Raceway
Fig. 9 — Defrost Board
Step 6 — Adjust Factory-Installed Options
DISCONNECT SWITCH — The optional disconnect switch
is non-fused. The switch has the capability of being locked in
place for safety purposes. The disconnect switch is only avail-
able for limited applications. See Electrical Data Tables 2A-2D
on pages 7-10 for disconnect switch usage.
11
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