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All units have two stages of heating and two stages of mechanical
cooling. Units which will have economizers may use thermostats
with two or three stages of cooling. All units can use single stage
or multi-stage thermostats. Refer to figures later in this section for
wiring.
The units are designed for operation on 60 hertz current and at
voltages as shown on the rating plate. All internal wiring in the unit
is complete. It is necessary to bring in the power supply to the
contactor as shown on the unit wiring diagram which is supplied
with each unit. The low voltage wiring must be connected between
the unit control panel and the room thermostat.
S
S
T
INGLE
TAGE
HERMOSTAT
To use a single stage thermostat, move jumper located to the
left of the terminal strip labeled "Stage Delay" from NONE to "5"
or "10" minutes. This selection will cause the control to run on
low stage for the selected time (5 or 10 minutes) then shift to
HIGH STAGE. This option controls both cooling and heating modes.
If the jumper is not moved, only low-stage cool and low-stage
heat will operate.
Refer to the unit wiring diagram for electrical connections. When
installed, the unit must be electrically grounded in accordance
with local codes or in the absence of local codes, with the
National Electrical Code, ANSI/NFPA No. 70, and/or the CSA C22.1 Electrical Code. Ensure low voltage connections are waterproof.
R
C
W1
W2
R C W1W2 G Y1 Y2
Two-Stage Heating with Two-Stage Cooling
Thermostat Diagram
Two-Stage Heating (timed) and Two-Stage Cooling (timed)
with Single Stage Thermostat Diagram
9
Thermostat
Two-Stage Heating
Y2
with
Two-Stage Cooling
Y1
G
ntegrated
I
Control Module
5 MINUTE DELAY
PERIOD WITH
JUMPER IN THIS
POSITION
10 MINUTE DELAY
PERIOD WITH
JUMPER IN THIS
POSITION
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