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Crankcase Heaters
Direct Replacement Crankcase Heaters
f
or Carrier
COMPONENTS
One-On-One™ Crankcase Heaters
F
igure 1
F
igure 2
Crankcase Heaters for Carrier
32452 HT36DL172 125 120 2.75 25 2
32456 HT36ES363 75 120 2.75 36.5 1 AB:AC:AD:38AA
3
2460 HT36NS377 75 120 2.75 88 2
E
B:30EA:30HH:
30HJ:48DD:50DD
32462 HT36NS477 75 230 2.75 88 2 6D:06D
32464 HT36FS474 75 240 2.75 52 2 EM:6D:06D
32466 HT36XS575 75 240 2.75 36 1
32468 HT36FL463 125 240 2.75 49 2
32472 HT36FL379 125 120 2.75 60 2
EM:06DM:
306B:50EQ
32474 HT36FL479 125 240 2.75 68 2
EM:06DM:
30HR:30HS
MARS
N
O.
CARRIER
N
O.
WATTS VOLTS
HEATER
L
ENGTH IN.
LEAD
L
ENGTH IN.
FIGURE
COMPRESSOR
M
ODEL
32456
3
2466
32475
32476
Figure 3
Figure 4
32475 Trane 661A-16093-12-4-C 100 115/230 6 1/2” 3/4” 4
32476 Trane 661A-13881-12-4-C 75 115/230 6 1/2” 3/4” 3
32478 Trane X13140729-01 140 115/230 11” 3/4” 4
MARS
NO.
OEM OEM NO. WATTS VOLTS LENGTH DIA. FIGURE
P
TCR Crankcase Heaters
MARS solid state crankcase
heater is a PTCR self regulating
device which performs in a similar
manner to a heater and
thermostat combination. Unlike
conventional resistance heater
and thermostat combinations
which provide only fully on or fully
off operation, MARS solid state
crankcase heater emits heat in
proportion to the compressor
requirements.
As compressor temperature
decreases, current flow through
the heater increases causing it to
heat up. When the compressor is warm and additional heat is not
required, current flow decreases. Only enough electricity is consumed
to maintain the correct temperature. MARS solid state crankcase
heaters are self adjusting to voltage variations.
Application:
MARS 32342 is for use on heaterless compressors to help correct
refrigerant migration or as a preventative maintenance precaution. It
will replace belly-band heaters on compressors up to 5 HP, 120 and
240 VAC. MARS 32342 attaches to the compressor using high
temperature, pressure sensitive aluminum foil. If more heat is required,
a second 32342 may be wired in parallel and applied to the opposite
side of the compressor.
Features:
• Total solid state reliability
• Self regulating
• 32342—fast, easy installation
• UL E49372, SA5202
• CSA LR46861, LR80111
MARS NO. TYPE WATTS VOLTS
32342
Heater with
self-stick foil
35 - 45 600 Max
3
2342
Self Regulating Crankcase Heaters
MARS self-regulating crankcase
heaters are designed for use with
refrigeration compressors up to
5HP and 40 inches in
circumference. These heating
cables provide peak heat during
cold periods and reduced heat
when the air temperature rises
and should not be used in non-
hazardous areas.
• Cold length: 30”
• Heat cable length: 50”
MARS NO. TYPE WATTS VOLTS
70970 Self Regulating 32W @ 50°F • 60W @ 0°F 120
70971 Self Regulating 32W @ 50°F • 60W @ 0°F 240