26
RT-SVX51H-EN
WWAARRNNIINNGG
LLiivvee EElleeccttrriiccaall CCoommppoonneennttss!!
FFaaiilluurree ttoo ffoollllooww aallll eelleeccttrriiccaall ssaaffeettyy pprreeccaauuttiioonnss
wwhheenn eexxppoosseedd ttoo lliivvee eelleeccttrriiccaall ccoommppoonneennttss ccoouulldd
rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy..
WWhheenn iitt iiss nneecceessssaarryy ttoo wwoorrkk wwiitthh lliivvee eelleeccttrriiccaall
ccoommppoonneennttss,, hhaavvee aa qquuaalliiffiieedd lliicceennsseedd eelleeccttrriicciiaann
oorr ootthheerr iinnddiivviidduuaall wwhhoo hhaass bbeeeenn pprrooppeerrllyy ttrraaiinneedd
iinn hhaannddlliinngg lliivvee eelleeccttrriiccaall ccoommppoonneennttss ppeerrffoorrmm
tthheessee ttaasskkss..
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
NNOOTTIICCEE
CCoommpprreessssoorr FFaaiilluurree!!
FFaaiilluurree ttoo ffoollllooww iinnssttrruuccttiioonn bbeellooww ccoouulldd rreessuulltt iinn
ccoommpprreessssoorr ffaaiilluurree..
UUnniitt mmuusstt bbee ppoowweerreedd aanndd ccrraannkkccaassee hheeaatteerrss
eenneerrggiizzeedd aatt lleeaasstt 88 hhoouurrss BBEEFFOORREE ccoommpprreessssoorrss
aarree ssttaarrtteedd..
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.
WWAARRNNIINNGG
HHaazzaarrddoouuss VVoollttaaggee!!
FFaaiilluurree ttoo ddiissccoonnnneecctt ppoowweerr bbeeffoorree sseerrvviicciinngg ccoouulldd
rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy..
DDiissccoonnnneecctt aallll eelleeccttrriicc ppoowweerr,, iinncclluuddiinngg rreemmoottee
ddiissccoonnnneeccttss bbeeffoorree sseerrvviicciinngg.. FFoollllooww pprrooppeerr
lloocckkoouutt//ttaaggoouutt pprroocceedduurreess ttoo eennssuurree tthhee ppoowweerr
ccaann nnoott bbee iinnaaddvveerrtteennttllyy eenneerrggiizzeedd.. VVeerriiffyy tthhaatt nnoo
ppoowweerr iiss pprreesseenntt wwiitthh aa vvoollttmmeetteerr..
☐ 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)
WWAARRNNIINNGG
HHaazzaarrddoouuss VVoollttaaggee ww//CCaappaacciittoorrss!!
FFaaiilluurree ttoo ddiissccoonnnneecctt ppoowweerr aanndd ddiisscchhaarrggee
ccaappaacciittoorrss bbeeffoorree sseerrvviicciinngg ccoouulldd rreessuulltt iinn ddeeaatthh oorr
sseerriioouuss iinnjjuurryy..
DDiissccoonnnneecctt aallll eelleeccttrriicc ppoowweerr,, iinncclluuddiinngg rreemmoottee
ddiissccoonnnneeccttss aanndd ddiisscchhaarrggee aallll mmoottoorr ssttaarrtt//rruunn
ccaappaacciittoorrss bbeeffoorree sseerrvviicciinngg.. FFoollllooww pprrooppeerr
lloocckkoouutt// ttaaggoouutt pprroocceedduurreess ttoo eennssuurree tthhee ppoowweerr
ccaannnnoott bbee iinnaaddvveerrtteennttllyy eenneerrggiizzeedd.. VVeerriiffyy wwiitthh aa
CCAATT IIIIII oorr IIVV vvoollttmmeetteerr rraatteedd ppeerr NNFFPPAA 7700EE tthhaatt aallll
ccaappaacciittoorrss hhaavvee ddiisscchhaarrggeedd..
FFoorr aaddddiittiioonnaall iinnffoorrmmaattiioonn rreeggaarrddiinngg tthhee ssaaffee
ddiisscchhaarrggee ooff ccaappaacciittoorrss,, sseeee PPRROODD--SSVVBB0066**--EENN..
IInnssttaallllaattiioonn
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