ARTC-SVX005B-EN
17
N
NO
OT
TIIC
CE
E
P
Prro
oo
off o
off F
Fllo
ow
w S
Sw
wiittcch
h!!
F
Fa
aiillu
urre
e tto
o p
prro
ov
viid
de
e ffllo
ow
w ssw
wiittcch
he
ess o
orr jju
um
mp
piin
ng
g--o
ou
utt o
off
ssw
wiittcch
he
ess cco
ou
ulld
d rre
essu
ulltt iin
n sse
ev
ve
erre
e e
eq
qu
uiip
pm
me
en
ntt
d
da
am
ma
ag
ge
e..
E
Ev
va
ap
po
orra
atto
orr a
an
nd
d cco
on
nd
de
en
nsse
err w
wa
atte
err cciirrccu
uiittss rre
eq
qu
uiirre
e
p
prro
oo
off o
off ffllo
ow
w ssw
wiittcch
he
ess..
••
F
Fa
aiillu
urre
e tto
o iin
nccllu
ud
de
e tth
he
e p
prro
oo
off o
off ffllo
ow
w d
de
ev
viicce
ess a
an
nd
d//
o
orr jju
um
mp
piin
ng
g o
ou
utt tth
he
esse
e d
de
ev
viicce
ess cco
ou
ulld
d cca
au
usse
e tth
he
e u
un
niitt
tto
o sstto
op
p o
on
n a
a sse
ecco
on
nd
da
arry
y lle
ev
ve
ell o
off p
prro
otte
eccttiio
on
n..
••
F
Frre
eq
qu
ue
en
ntt ccy
ycclliin
ng
g o
on
n tth
he
esse
e h
hiig
gh
he
err lle
ev
ve
ell
d
diia
ag
gn
no
ossttiicc d
de
ev
viicce
ess cco
ou
ulld
d cca
au
usse
e e
ex
xcce
essssiiv
ve
e tth
he
errm
ma
all
a
an
nd
d p
prre
essssu
urre
e ccy
ycclliin
ng
g o
off u
un
niitt cco
om
mp
po
on
ne
en
nttss ((O
O--rriin
ng
gss,,
g
ga
asskke
ettss,, sse
en
nsso
orrss,, m
mo
otto
orrss,, cco
on
nttrro
ollss,, e
ettcc..)) a
an
nd
d//o
orr
ffrre
ee
ezze
e d
da
am
ma
ag
ge
e,, rre
essu
ullttiin
ng
g iin
n p
prre
em
ma
attu
urre
e ffa
aiillu
urre
e o
off
tth
he
e cch
hiilllle
err..
Refrigeration Controls
Controls on the refrigeration system are designed to
provide safety for the major components and for
proper operation of the system.
Pressure transducers convert pressure into an
electronic signal that the microprocessor displays in
pounds per square inch (psi). Transducers vary in
pressure ranges that depend on the type of refrigerant
used. Pressure transducers are calibrated using the
touchscreen interface panel.
Temperature sensors transmit temperature data
electronically to the microprocessor for display in
either Fahrenheit (°F) or Celsius (°C). Temperature
sensors are calibrated using the touchscreen interface
panel.
Low Pressure Bypass
Logic that uses a time delay that temporarily bypasses
the low-pressure switch for compressor start up. Once
the delay times out the normal controls are put back on
line within the control circuit.
Sight Glass
When the sight glass shows a green indicator, no moisture is present. When the sight glass
shows a yellow indicator, there is moisture in the refrigerant line. Bubbles can be observed
whenever chiller/heater cycling causes the pressure to change up or down.
N
NO
OT
TIIC
CE
E
E
Eq
qu
uiip
pm
me
en
ntt D
Da
am
ma
ag
ge
e!!
F
Fa
aiillu
urre
e tto
o rre
em
mo
ov
ve
e m
mo
oiissttu
urre
e ffrro
om
m ssy
ysstte
em
m cco
ou
ulld
d
cca
au
usse
e cco
orrrro
ossiio
on
n w
wiitth
hiin
n tth
he
e cch
hiilllle
err//h
he
ea
atte
err
cco
om
mp
po
on
ne
en
nttss,, a
an
nd
d d
de
eg
grra
ad
de
e p
pe
errffo
orrm
ma
an
ncce
e..
P
Pe
errffo
orrm
m v
va
accu
uu
um
m e
ev
va
accu
ua
attiio
on
n o
off ssy
ysstte
em
m tto
o rre
em
mo
ov
ve
e
m
mo
oiissttu
urre
e..
Phase Monitor
A compressor can fail if operated in reverse for more than a minute. A phase monitor is used
on three phase power systems to ensure that the electricity supplying the chiller/heater is
configured appropriately. A phase monitor prevents a motor from operating in reverse—if
any of the three legs of power are landed incorrectly—and will shut the system down upon
detection of a reversed phase condition.
