12
PRGD-SVX01F-EN
the controller activates the pump-out cycle to
remove the accumulated non-condensables from
the purge tank. When enough non-condensables
have been removed and the purge compressor
suction temperature increases in response, the
controller terminates the pump-out cycle.
•
S
Sa
attu
urra
atte
ed
d cco
on
nd
de
en
nsse
err tte
em
mp
pe
erra
attu
urre
e sse
en
nsso
orr.. This
sensor is mounted on the chiller. If the chiller is
running, the controller uses the value of this
temperature sensor to adjust the purge pump-out
initiate/terminate setpoints. It may be used to
prohibit pump-out if system conditions are too cool.
•
S
Sa
attu
urra
atte
ed
d e
ev
va
ap
po
orra
atto
orr tte
em
mp
pe
erra
attu
urre
e sse
en
nsso
orr.. This
sensor is mounted on the chiller. If the chiller is off,
the controller uses the value of this temperature
sensor to adjust the purge pump-out initiate/
terminate setpoints. It may be used to prohibit
pump-out if system conditions are too cool.
•
C
Ca
arrb
bo
on
n tta
an
nkk tte
em
mp
pe
erra
attu
urre
e sse
en
nsso
orr.. This sensor is
mounted in the carbon tank of the purge system. It
provides feedback to the carbon regeneration
algorithm. The sensor and the controller function
much the same as a thermostat to control the
carbon tank heater.
•
L
Liiq
qu
uiid
d lle
ev
ve
ell sse
en
nsso
orr.. This sensor resides in the
purge control panel. It monitors the status of the
normally closed float switch, which is mounted in
the bottom of the purge tank. If an adequate
amount of liquid fails to drain from the purge tank,
the float switch and sensor detect the condition and
prevent further purge operation.
•
C
Co
on
nd
de
en
nssiin
ng
g u
un
niitt L
LL
LIID
D.. This LLID resides in the
purge control panel. It uses a high-capacity relay to
control the operation of the purge condensing unit.
•
Q
Qu
ua
ad
d rre
ella
ay
y L
LL
LIID
D.. This LLID resides in the purge
control panel. It has four relay outputs that are used
to control the pump-out compressor, the carbon
tank heater, the regeneration solenoid valve, and an
alarm output.
•
D
Du
ua
all ttrriia
acc L
LL
LIID
D.. This LLID resides in the purge
control panel. It has two triac-type outputs that are
used to control the pump-out solenoid valve and
the exhaust solenoid valve. The purge system
draws its control power from the power supplies of
the chiller control panel.
P
Pu
urrg
ge
e S
Sy
ysstte
em
m O
Ov
ve
errv
viie
ew
w
Summary of Contents for PRGD series
Page 35: ...PRGD SVX01F EN 35 S Sc ch he em ma at ti ic c W Wi ir ri in ng g D Di ia ag gr ra am m ...
Page 36: ...36 PRGD SVX01F EN S Sc ch he em ma at ti ic c W Wi ir ri in ng g D Di ia ag gr ra am m ...
Page 37: ...PRGD SVX01F EN 37 N No ot te es s ...
Page 38: ...38 PRGD SVX01F EN N No ot te es s ...
