Service Alarm Control Board - Carrier R-22 Application Manual And Service Manual

A
BASKET TOP
For suspected electrical failures, check for loose or faulty electrical
connections or defective fan-motor capacitor. Fan motor is
equipped with thermal overload device in motor windings which
may open under adverse operating conditions. Allow time for
motor to cool so device can reset. Further checking of motor can
be done with an ohmmeter. Set scale on R X 1 position, check for
continuity between 3 leads. Replace motors that show an open
circuit in any of the windings. Place 1 lead of ohmmeter on each
motor lead. At same time, place other ohmmeter lead on motor
case (ground). Replace any motor that shows resistance to ground,
signs of arcing, burning, or overheating.
Step 11—Service Alarm Control Board
NOTE: If the proper night-setback thermostat is not used, the
service-alarm control will work, but there will be no light
indication on thermostat.
The service-alarm control provides immediate warning when
outdoor heat pump requires servicing. It turns on indoor
thermostat-malfunction light if compressor does not operate for
either heating or cooling. This enables owner to obtain timely
heat-pump service during heating season, reducing supplementary
electric heat costs, and during cooling season, reducing period of
heat discomfort.
The service alarm is an accessory device. Service alarm locks out
compressor under certain adverse operating conditions. System is
manually reset by shutting it off at thermostat subbase, then
turning it back on. If adverse condition is corrected, system
restarts.
One example of an adverse condition would be a system located in
a desert climate where high operating temperatures may cause
system to shut down on the high-pressure switch or on the
compressor internal overload.
Connect service alarm to outdoor-unit control-circuit-terminal
board. (See Fig. 25 and wiring diagram on unit.)
Connect all field line-power wires to unit in usual manner. Route
1 field line-power supply wire through metallic loop on bottom of
service alarm then to normal unit connection. Units with RLA of
less than 14 amps will require 2 passes through the metallic loop.
Refer to Fig. 25 or 26 for wiring connections for service alarm or
service alarm with solid-state cycle-protector accessories, when
used.
NOTE: The wire from the X terminal on the service alarm to L on
the outdoor terminal board, indoor terminal board, and thermostat
subbase is field supplied and wired when using defrost controls
HK32FA003 or HK32FA006. When defrost control CES0110063
or CES0130024 is used, field-supplied wire from X terminal on
FAN
A91428
ORIFICE
Fig. 24—Fan Position
SILENCER SYSTEM™ AND BASKET TOP
Fan Motor
Part No.
HC29GE208
HC31GE230/231
HC33GE208
HC33GE232
HC34GE231
HC34GE460
HC35GE208
HC35GE232
HC37GE208
HC37GE230
HC38GE221
HC39GE232
HC39GE234
HC39GE461
HC40GE230
HC40GE461
BASEPAN DIMENSIONS FOR STAR BURST TOP (IN.)
Small
Medium
Large
service alarm to L on indoor thermostat subbase is required.
Service alarm requires 2 inputs.
1. It must sense a 24v input from thermostat. As thermostat calls
for heating or cooling, it supplies 24v to service alarm device.
2. A current transformer (or induction loop) similar to a
clamp-on ammeter senses current draw in the compressor
lead. Induction loop must sense a minimum current draw
when thermostat is calling for heating or cooling.
NOTE: On a single-phase compressor, induction loop senses
current in common leg. On a 3-phase compressor, induction loop
senses current in any 1 of the phases.
23
TOP COVER
3 IN. SMALL & MEDIUM BASE UNITS
4 IN. LARGE BASE UNIT
FROM DISCHARGE LOUVER
TO TOP OF FAN BLADE
FAN BLADE
STAR BURST TOP
Table 13—Fan Position
Dimension A (In.)
Fan Blade
Part No.
Brookside
LA01EB023 4-5/32
LA01EC019 5-1/8
LA01EA026 4-5/8
LA01RA015 4-7/8
LA01EW049 5-1/4
LA01RA015 4-29/32
LA01RA015 5-5/32
LA01EW048 4-15/16
LA01EA025 5-7/8
LA01RA024 5-11/32
LA01RA026 5-9/16
LA01EA025 6-1/8
LA01EW042 6-5/32
LA01EA031 7-25/32
LA01EC018 5-11/16
LA01RA026 5-1/2
LA01EA036 5-9/16
LA01EA024 5-3/32
LA01EC018 5-1/2
LA01EA036 6-1/16
LA01EC018 6-1/4
LA01RA026 6-1/16
LA01EA024 5-9/32
LA01EA024 5-27/32
22-1/2 x 26-3/16
30 x 33
38-5/8 x 42-1/16
A88347
Revcor
–
–
–
4-5/8
–
4-17/32
4-25/32
–
–
5-3/32
4-11/16
6-1/8
6-1/8
–
–
4-3/4
–
4-27/32
–
–
–
5-7/32
5-11/32
5-19/32