66
RT-SVX34R-EN
Preparing the Unit for Operation
Be sure to complete all of the procedures described in
this section before starting the unit for the first time.
Use the checklist provided below in conjunction with
the “Installation Checklist” 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 will be
unobstructed.
• Check the compressor crankcase oil level. Oil
should be visible in the compressor oil sight glass.
The oil level may be above the sight glass prior to
the initial start. Use appropriate lighting (flashlight)
to verify the presence of oil.
• Prior to unit startup allow the crankcase heater to
operate a minimum of 8 hours to remove liquid
refrigerant from the compressor sump.
• Optional Service Valves - Verify that the discharge
service valve and suction service valve fully open
on each circuit.
NNoottee:: High Efficiency units come standard with
discharge service valves.
• 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.
• Inspect the interior of the unit for tools and debris
and install all panels in preparation for starting the
unit.
Electrical Phasing
Unlike traditional reciprocating compressors, scroll
compressors are phase sensitive. Proper phasing of the
electrical supply to the unit is critical for proper
operation and reliability.
The compressor motor is internally connected for
clockwise rotation with the incoming power supply
phased as A, B, C. Proper electrical supply phasing can
be quickly determined and corrected before starting the
unit by using an instrument such as an Ideal - Sperry
61-520 Phase Sequence Indicator and following the
steps below:
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..
• Open the disconnect switch or circuit protector
switch that provides the supply power to the unit's
power terminal block or to the unit mounted
disconnect switch.
• To be consistent with the compressor leads,
connect the phase sequence indicator leads to the
terminal block or unit mounted disconnect switch
as follows;
Table 40. Phase sequence leads
Phase Sequence Leads
Unit Power Terminal
Red (phase A)
L1
Blue (phase B)
L2
Black (Phase C)
L3
• Turn the “System” selection switch to the “Off”
position and the “Fan” selection switch (if
Applicable) to the “Auto” position.
• Close the disconnect switch or circuit protector
switch that provides the supply power to the unit's
power terminal block or unit mounted disconnect
switch.
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..
HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK
HTB1 OR UNIT DISCONNECT SWITCH.
• 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.
• Restore main electrical power and recheck phasing.
If the phasing is correct, open the disconnect switch
or circuit protection switch and remove the phase
sequence indicator.
SSttaarrttuupp
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