The set of normally open contacts of energized relay TDR close
and complete the circuit through evaporator blower (indoor) fan
motor (IFM).
NOTE:
Once the compressor has started and then has stopped, it
should not be started again until 5 minutes have elapsed.
The cooling cycle remains “on” until the room temperature drops
to a point that is slightly below the cooling control setting of the
room thermostat. At this point, the thermostat “breaks” the circuit
between thermostat terminal R to terminals Y and G. These open
circuits deenergize contactor coil C and relay coil TDR. The
condenser and compressor motors stop. After a 30-second delay,
the blower motor stops. The unit is in a “standby” condition,
waiting for the next “call for cooling” from the room thermostat.
MAINTENANCE
To ensure continuing high performance, and to minimize the
possibility of premature equipment failure, periodic maintenance
must be performed on this equipment. This cooling unit should be
inspected at least once each year by a qualified service person. To
troubleshoot heating or cooling of units, refer to tables at the back
of the book.
NOTE TO EQUIPMENT OWNER: Consult your local dealer
about the availability of a maintenance contract.
C99037
Fig. 15—Cooling Charging Chart, 50GS018 Units
Fig. 17—Cooling Charging Chart, 50GS030 Units
C99038
C99039
Fig. 16—Cooling Charging Chart, 50GS024 Units
C99040
Fig. 18—Cooling Charging Chart, 50GS036 Units
18
