26
RT-SVX51H-EN
W
WA
AR
RN
NIIN
NG
G
L
Liiv
ve
e E
Elle
eccttrriicca
all C
Co
om
mp
po
on
ne
en
nttss!!
F
Fa
aiillu
urre
e tto
o ffo
ollllo
ow
w a
allll e
elle
eccttrriicca
all ssa
affe
etty
y p
prre
ecca
au
uttiio
on
nss
w
wh
he
en
n e
ex
xp
po
osse
ed
d tto
o lliiv
ve
e e
elle
eccttrriicca
all cco
om
mp
po
on
ne
en
nttss cco
ou
ulld
d
rre
essu
ulltt iin
n d
de
ea
atth
h o
orr sse
erriio
ou
uss iin
njju
urry
y..
W
Wh
he
en
n iitt iiss n
ne
ecce
essssa
arry
y tto
o w
wo
orrkk w
wiitth
h lliiv
ve
e e
elle
eccttrriicca
all
cco
om
mp
po
on
ne
en
nttss,, h
ha
av
ve
e a
a q
qu
ua
alliiffiie
ed
d lliicce
en
nsse
ed
d e
elle
eccttrriicciia
an
n
o
orr o
otth
he
err iin
nd
diiv
viid
du
ua
all w
wh
ho
o h
ha
ass b
be
ee
en
n p
prro
op
pe
errlly
y ttrra
aiin
ne
ed
d
iin
n h
ha
an
nd
dlliin
ng
g lliiv
ve
e e
elle
eccttrriicca
all cco
om
mp
po
on
ne
en
nttss p
pe
errffo
orrm
m
tth
he
esse
e tta
asskkss..
4. Observe the ABC and CBA phase indicator lights on
the face of the sequencer. The ABC indicator light
will glow if the phase is ABC. If the CBA indicator
light glows, open the disconnect switch or circuit
protection switch and reverse any two power wires.
5. Restore the main electrical power and recheck the
phasing. If the phasing is correct, open the
disconnect switch or circuit protection switch and
remove the phase sequence indicator.
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
H
Ha
azza
arrd
do
ou
uss V
Vo
olltta
ag
ge
e w
w//C
Ca
ap
pa
acciitto
orrss!!
F
Fa
aiillu
urre
e tto
o d
diisscco
on
nn
ne
ecctt p
po
ow
we
err a
an
nd
d d
diisscch
ha
arrg
ge
e
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..
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