Trane RAUJ-C20, Installation, Operation And Maintenance Manual

Page: 94 / 132

94 SS-SVX11K-EN
Pre-Start
Use the checklist provided below in conjunction with
the “General Unit Requirement” checklist” to ensure
that the unit is properly installed and ready for
operation. Be sure to complete all of the procedures
described in this section before starting the unit for the
first time.
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..
• Turn the field supplied disconnect switch, located
upstream of the unit, to the “Off” position.
N No otte e:: Verify that the 115 volt control switch (1S2) in
the unit control box is in the "Off" position.
• Turn the “System” selection switch (at the Remote
Panel) to the “Off” position and the “Fan” selection
switch (if applicable) to the “Auto” or “Off”
position.
• Check all electrical connections for tightness and
“point of termination” accuracy.
• Verify that the condenser airflow will be
unobstructed.
• Check the condenser fan blades. Ensure they rotate
freely within the fan orifices and are securely
fastened to the fan motor shaft.
• Disable the compressor(s) by unplugging the reset
relay for each circuit. Refer to the unit-wiring
diagram that shipped with the unit.
N NO OT TIIC CE E
C Co om mp prre esssso orr D Da am ma ag ge e!!
E Ex xcce essssiiv ve e lliiq qu uiid d a accccu um mu ulla attiio on n iin n tth he e ssu uccttiio on n lliin ne ess
cco ou ulld d rre essu ulltt iin n cco om mp prre esssso orr d da am ma ag ge e..
D Do o n no ott a allllo ow w lliiq qu uiid d rre effrriig ge erra an ntt tto o e en ntte err tth he e ssu uccttiio on n
lliin ne e..
• Verify that all compressor service valves, discharge
service valves, and liquid line service valves are
back seated on each circuit.
IIm mp po orrtta an ntt:: COMPRESSOR SERVICE VALVES MUST
BE FULLY OPENED BEFORE START-UP
(SUCTION, DISCHARGE, AND LIQUID
LINE).
IIm mp po orrtta an ntt:: After liquid line service valves are fully
opened (back seated), close just 1/4 turn
to allow for fan pressure control (4S7,
4S8) operation.
• Check the compressor oil levels. Oil levels must be
near or above the top of all compressor sight
glasses.
• P Pa acckk S Stto occkk U Un niittss:: Two low pressure switches are
installed at the factory. However, only one is wired
into the control circuit. This is to facilitate an EVP
chiller or air over evaporator application. Before
starting the system, verify that the correct pressure
switch is connected to the control circuit. See
Pressure Control Switch Settings table in Start-Up
chapter for the pressure control settings, and the
unit wiring diagram that shipped with the unit, for
the appropriate connections.
• Check the condenser coils. They should be clean
and the fins should be straight. Straighten any bent
coil fins with an appropriate sized fin comb.
• Inspect the interior of the unit for tools and debris.
EVP Chiller Applications
• Flush building piping.
N NO OT TIIC CE E
H He ea att E Ex xcch ha an ng ge err D Da am ma ag ge e!!
F Fa aiillu urre e tto o ffo ollllo ow w iin nssttrru uccttiio on nss b be ello ow w cco ou ulld d rre essu ulltt iin n
h he ea att e ex xcch ha an ng ge err d da am ma ag ge e..
IIff a an n a acciid diicc cco om mm me errcciia all ffllu ussh hiin ng g sso ollu uttiio on n iiss u usse ed d,,
b by yp pa assss tth he e E EV VP P cch hiilllle err tto o p prre ev ve en ntt d da am ma ag ge e ..
• Clean strainer. Make sure strainer blow down valve
or plug is in place.
• Connect chiller. Make sure chiller 1/2”x14 NPTE
plug is in place.
• Close drain valve
• Fill system with water.
• Vent system piping at the highest points.
• Inspect water piping for leaks and repair.
System Evacuation Procedures
N NO OT TIIC CE E
O Op pe erra attiin ng g U Un nd de err V Va accu uu um m!!
F Fa aiillu urre e tto o ffo ollllo ow w tth he esse e iin nssttrru uccttiio on nss w wiillll rre essu ulltt iin n
cco om mp prre esssso orr ffa aiillu urre e..
D Do o n no ott o op pe erra atte e o orr a ap pp plly y p po ow we err tto o tth he e cco om mp prre esssso orr
w wh hiille e u un nd de err a a v va accu uu um m..
Each refrigeration circuit for split system applications
must be evacuated before the unit can be started. Use a
rotary type vacuum pump capable of pulling a vacuum
of 100 microns or less. Verify that the unit disconnect
switch and the system control circuit switches are
“OFF”.