Carrier 50DL - Manual (Page 11)

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(A) HEATING SETBACK (B) COOLING SETUP OR LOCKOUT
Fig. 15 — Setback/Setup Module (Partial)
5. Remove cover from thermostat (or from trans­
mitter if a remote sensor is used); note the red
diagnostic light-emitting diodes (LED’s). See
Fig. 16.
6. To call for cooling, move the thermostat or
transmitter cooling set point (blue lever) below
room temperature. Cooling LED on the right-
hand side of thermostat or transmitter should
begin to glow. Check the cooling effect at supply
duct outlets.If the mechanical cooling does not
come on, see Service, Electronic Component
Checkout.
7. Move the thermostat or transmitter cooling set
point above room temperature. The cooling
equipment should cycle off and the cooling
LED intensity should decrease to a faint glow
or go off completely. The economizer should
move to minimum position.
To Shut Off Unit — For standard units, set the
subbase selector switch to OFF or set the cooling
temperature selector lever above room tempera­
ture. For units with Energy Management option, set
the cooling temperature selector switch above
room temperature.
Do not shut off unit circuit breakers except
when unit is serviced. Crankcase heater is ener­
gized only when unit power is on.
HEATING (Electric Heat Units)
1. Turn on unit power; set circuit breakers at ON.
2. On units with Energy Management option, posi­
tion the HEAT SETBACK SELECT switch in
the setback/setup module to the desired position
(5°, 10°, or 15°). See Fig. 15.
3. Move the thermostat or transmitter heating set
point (red lever) above room temperature. The
HEATING
LEVER (RED) COOLING
LEVER(BLUE)
COVER THERMOSTAT/TRANSMITTER
Fig. 16 — Electronic Thermostat/Transmitter (Without Subbase)
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