Specifications

Page 8
10-Combustion Air Blower Relay K13
(all units)
Relay K13 is a DPDT relay located inside the control box.
K13 is energized by 1st stage heating demand from thermo
stat and is energized throughout the heating demand. When
energized, K13 normally open contacts close to energize
combustion air blower and begin a heating sequence. A cen
trifugal prove" switch located in combustion air blower motor
closes as the motor nears full speed to prove" combustion air
blower operation. When the switch closes, the ignition control
and gas valve are energized to begin a heating sequence.
11-Capacitors C1 & C2 (all units)
Capacitors C1 (first stage) & C2 (second stage) are 370V ca
pacitors used to assist in the start up of condenser fans B4
(first stage) and B5 (second stage). The capacitors are ener
gized by K10 (first stage) & K68 (second stage). Different volt
age units have different MFD's. They are as follows: Y volt
age,15 MFD; G voltage,12.5 MFD; and J voltage, 10 MFD.
12-Indoor Blower Contactor K3 (all units)
K3 is a 24V to line voltage contactor used to energize the in
door blower motor (B3) and economizer (if used) in response
to blower demand. In cooling, as well as heating mode, K3 is
energized by thermostat or constant fan demand. All units use
threepoledoublebreak contactors.
13-Limit Control S41 (all units)
S41 is a SPST N.C. low ambient thermostat switch, which
opens on a temperature fall at 55±5 degrees and closes on a
temperature rise at 65±6 degrees. It is used to increase the
evaporating temperature by energizing and de-energizing the
second condenser fan contactor (K68). This intermittent fan
operation allows the cooling system to operate in cold condi
tions without icing the evaporator coil and losing capacity.
14-Circuit Breaker CB10 (all units)
All units are equipped with a circuit breaker CB10 located in
the control box. Circuit breaker provides overcurrent protec
tion to the unit. Circuit breakers used are three pole manual
reset switches with varying voltage and amperage ratings
(depending on tonnage and voltage of the unit).
15-GFI Receptacle J11 (all units)
All units are equipped with a 110 volt ground fault interrupter
(GFI) receptacle located in the control box. This provides easy
access to electricity for the service person. Separate wiring
must be run for 110v receptacle.
1st STAGE
THERMOMETER WELL
(GAUGE PORT)
FILTER/DRIER
SUCTION LINE
COMPRESSOR (B2)
DISCHARGE LINE
SUCTION LINE
2nd STAGE
GCS241603 PLUMBING COMPONENTS
FIGURE 5
THERMOMETER WELL
(GAUGE PORT)
FILTER/DRIER
COMPRESSOR (B1)
DISCHARGE
LINE
LIQUID LINE
CONDENSER COIL
CONDENSER COIL
LIQUID LINE
GAUGE PORT
GAUGE PORT
HIGH PRESSURE
SWITCH (S7)
HIGH PRESSURE
SWITCH (S4)
LOW PRESSURE
SWITCH (S87)
LOW PRESSURE
SWITCH (S88)
LOW AMBIENT SWITCH (S84)
EARLY MODEL
LOW AMBIENT SWITCH (S11)
EARLY MODEL
LOW AMBIENT SWITCH (S84)
LATE MODEL
LOW AMBIENT SWITCH (S11)
LATE MODEL
LIQUID LINE