Trane RAUJ-C20, Installation, Operation And Maintenance Manual

Page: 67 / 132

SS-SVX11K-EN 67
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..
Before installing any connecting wiring, see drawings
Dimensions and Weights chapter for the electrical
access locations provided on the unit. Install
appropriately sized control wiring for the 115 volt
electrical components as required by the application.
Since the unit-mounted 115V control power
transformer (1T1) is provided on all units, it is not
necessary to run a separate 115 volt control power
source to the unit.
N No otte e:: All 200/230V units are shipped with transformer
1T1 wired for 200 volt operation. If the unit is to
be operated on a 230V power supply, rewire the
transformer as shown on the unit schematic.
N No otte e:: All field wiring must conform to NEC guidelines
as well as state and local codes.
Controls Wiring — 115 VAC
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..
Install appropriately sized 115 volt control wiring for
the electrical components as required by the
application.
These components may include:
• Hot gas bypass solenoid wiring
• Supply fan interlock and control circuit
• System control switch wiring (“No Control” units)
• Step controller wiring (“No Control” units)
• Chilled water pump interlock wiring (EVP units)
• Chilled water flow switch wiring (EVP units)
• Outside air thermostat wiring (EVP units)
• Liquid line solenoid valve(s)
Supply Fan Interlock
Control Options Utilizing an Air Handler
The normally open evaporator fan interlock auxiliary
contacts and the evaporator fan controls; system On/
Off switch, fan starter/contactor, and overloads, must
be wired as illustrated in the appropriate interlock
connection wiring diagram for the specified
application.
EVP Flow control (6S58)
The flow switch is a binary output device and must be
wired within the interlock circuit. Before installing the
control wiring, refer to the remote panel illustration for
the electrical access into the panel. Refer to the field
connection diagram for the specific connection points
inside the remote panel.
EVP Circulating Pump Interlock
Pump operation and sequence is the responsibility of
the installer. During compressor operation, the fluid
flow through the chiller must be maintained. The field
provided; ON/OFF switch, pump starter/contactor,
auxiliary contacts and overloads (OLs) must be
installed as part of the system’s interlock circuit to
disable the compressors in the event the circulating
pump shuts down or is turned off.
N No otte e:: Due to the location of the 5S1 switch within the
circulating pump control circuit, it can be used as
a system ON/OFF switch.
Outside Air Thermostat (5S57)
A field provided outside air thermostat must be
installed within the interlock circuit to prevent the
system from operating below its workable temperature
range. Before installing the control wiring, refer to the
remote panel illustration for the electrical access into
the panel. Refer to the field connection diagram for the
specific connection points inside the remote panel.
Refer to the “EVP Chiller Controls” section for
temperature requirements.
Hot Gas Bypass (All control options)
If hot gas bypass is required, refer to the “Refrigerant
Piping” illustration for supporting equipment tubing
connections. Refer to the specific control option field
connection diagram terminal connections for the hot
gas bypass solenoid coils.
Controls Wiring — 24 VAC
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..
IIn nsstta alllla attiio on n E Elle eccttrriicca all