Trane Foundation EBC180, Installation, Operation And Maintenance Manual

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RT-SVX50J-EN 23
Compressor Crankcase Heaters
N NO OT TIIC CE E
C Co om mp prre esssso orr F Fa aiillu urre e!!
F Fa aiillu urre e tto o ffo ollllo ow w iin nssttrru uccttiio on n b be ello ow w cco ou ulld d rre essu ulltt iin n
cco om mp prre esssso orr ffa aiillu urre e..
U Un niitt m mu usstt b be e p po ow we erre ed d a an nd d ccrra an nkkcca asse e h he ea atte errss
e en ne errg giizze ed d a att lle ea asstt 8 8 h ho ou urrss B BE EF FO OR RE E cco om mp prre esssso orrss
a arre e sstta arrtte ed d..
Each compressor can be equipped with a crankcase
heater. The proper operation of the crankcase heater is
important to maintain an elevated compressor oil
temperature during the “Off” cycle to reduce oil
foaming during compressor starts. Oil foaming occurs
when refrigerant condenses in the compressor and
mixes with the oil. In lower ambient conditions,
refrigerant migration to the compressor could increase.
When the compressor starts, the sudden reduction in
crankcase pressure causes the liquid refrigerant to boil
rapidly causing the oil to foam. This condition could
damage compressor bearings due to reduced
lubrication and could cause compressor mechanical
failures.
Before starting the unit in the “Cooling” mode, set the
system switch to the “Off” position and turn the main
power disconnect to the “On” position and allow the
crankcase heater to operate a minimum of 8 hours.
Before closing the main power disconnect switch,
insure that the “System”selection switch is in the “Off”
position and the “Fan” selection switch is in the “Auto”
position.
Close the main power disconnect switch and the unit
mounted disconnect switch, if applicable.
Checklist
Use the following checklist in conjunction with the
general checklist (
“General Unit Requirements,” p. 18 )
to ensure that the unit is properly installed and ready
for operation.
W WA AR RN NIIN NG G
H Ha azza arrd do ou uss V Vo olltta ag ge e!!
F Fa aiillu urre e tto o d diisscco on nn ne ecctt p po ow we err b be effo orre e sse errv viicciin ng g cco ou ulld d
rre essu ulltt iin n d de ea atth h o orr sse erriio ou uss iin njju urry y..
D Diisscco on nn ne ecctt a allll e elle eccttrriicc p po ow we err,, iin nccllu ud diin ng g rre em mo otte e
d diisscco on nn ne eccttss b be effo orre e sse errv viicciin ng g.. F Fo ollllo ow w p prro op pe err
llo occkko ou utt//tta ag go ou utt p prro occe ed du urre ess tto o e en nssu urre e tth he e p po ow we err
cca an n n no ott b be e iin na ad dv ve errtte en nttlly y e en ne errg giizze ed d.. V Ve erriiffy y tth ha att n no o
p po ow we err iiss p prre esse en ntt w wiitth h a a v vo ollttm me ette err..
☐ Check all electrical connections for tightness and
“point of termination” accuracy.
☐ Verify that the condenser airflow is unobstructed.
☐ Verify that the condenser fan and indoor blower
turn freely without rubbing and are properly
tightened on the shafts.
☐ Check the supply fan belts for proper tension and
the fan bearings for sufficient lubrication. If the
belts require adjustment, or if the bearings need
lubricating, refer to the maintenance section of this
manual for instructions.
☐ Verify that a condensate trap is installed and the
piping is properly sized and pitched.
☐ Verify that the correct size and number of filters are
in place.
☐ Inspect the interior of the unit for tools and debris
and install all panels in preparation for starting the
unit.
Factory-Mounted Unit Options
Unit Disconnect (FIYUDC)
W WA AR RN NIIN NG G
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cca ap pa acciitto orrss b be effo orre e sse errv viicciin ng g cco ou ulld d rre essu ulltt iin n d de ea atth h o orr
sse erriio ou uss iin njju urry y..
D Diisscco on nn ne ecctt a allll e elle eccttrriicc p po ow we err,, iin nccllu ud diin ng g rre em mo otte e
d diisscco on nn ne eccttss a an nd d d diisscch ha arrg ge e a allll m mo otto orr sstta arrtt//rru un n
cca ap pa acciitto orrss b be effo orre e sse errv viicciin ng g.. F Fo ollllo ow w p prro op pe err
llo occkko ou utt// tta ag go ou utt p prro occe ed du urre ess tto o e en nssu urre e tth he e p po ow we err
cca an nn no ott b be e iin na ad dv ve errtte en nttlly y e en ne errg giizze ed d.. V Ve erriiffy y w wiitth h a a
C CA AT T IIIIII o orr IIV V v vo ollttm me ette err rra atte ed d p pe err N NF FP PA A 7 70 0E E tth ha att a allll
cca ap pa acciitto orrss h ha av ve e d diisscch ha arrg ge ed d..
F Fo orr a ad dd diittiio on na all iin nffo orrm ma attiio on n rre eg ga arrd diin ng g tth he e ssa affe e
d diisscch ha arrg ge e o off cca ap pa acciitto orrss,, sse ee e P PR RO OD D--S SV VB B0 06 6* *--E EN N..
W WA AR RN NIIN NG G
P Prro op pe err F Fiie elld d W Wiirriin ng g a an nd d G Grro ou un nd diin ng g
R Re eq qu uiirre ed d!!
F Fa aiillu urre e tto o ffo ollllo ow w cco od de e cco ou ulld d rre essu ulltt iin n d de ea atth h o orr
sse erriio ou uss iin njju urry y..
A Allll ffiie elld d w wiirriin ng g M MU US ST T b be e p pe errffo orrm me ed d b by y q qu ua alliiffiie ed d
p pe errsso on nn ne ell.. IIm mp prro op pe errlly y iin nsstta alllle ed d a an nd d g grro ou un nd de ed d
ffiie elld d w wiirriin ng g p po osse ess F FIIR RE E a an nd d E EL LE EC CT TR RO OC CU UT TIIO ON N
h ha azza arrd dss.. T To o a av vo oiid d tth he esse e h ha azza arrd dss,, y yo ou u M MU US ST T ffo ollllo ow w
rre eq qu uiirre em me en nttss ffo orr ffiie elld d w wiirriin ng g iin nsstta alllla attiio on n a an nd d
g grro ou un nd diin ng g a ass d de essccrriib be ed d iin n N NE EC C a an nd d y yo ou urr llo occa all//
sstta atte e//n na attiio on na all e elle eccttrriicca all cco od de ess..
IIm mp po orrtta an ntt:: All phases of this installation must comply
with NATIONAL, STATE, and LOCAL
CODES. In addition to local codes, the
installation must comply with National
Electric Code - ANSI/NFPA NO. 70 LATEST
REVISION.
1. Field connections are made by first removing the
compressor access panel on the front of the unit.
IIn nsstta alllla attiio on n