Bristol A Series Handbuch für Installation und Service - Seite 9
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START ASSIST WIRING DIAGRAM (START AND RUN CAPACITORS):
START
WINDING
LINE
C
S
R
RUN
WINDING
IDENTIFIED
TERMINAL TO
LINE SIDE
Use this diagram on systems with expansion valve and systems that do not allow pressure equalization
prior to compressor start.
NOTE: WHEN CRANKCASE HEATER IS USED, CONNECT TO INCOMING POWER LINE SO THAT
HEATER IS ENERGIZED CONTINUOUSLY.
PERMANENT SPLIT CAPACITOR (PSC) WIRING DIAGRAM:
LINE
C
R
RUN
WINDING
IDENTIFIED
TERMINAL TO
LINE SIDE
Use this diagram on systems that allow pressure equalization prior to compressor start.
NOTE: WHEN CRANKCASE HEATER IS USED, CONNECT TO INCOMING POWER LINE SO
THAT HEATER IS ENERGIZED CONTINUOUSLY.
START ASSIST WIRING DIAGRAM (PTCR AND RUN CAPACITOR):
LINE
C
R
RUN
WINDING
IDENTIFIED
TERMINAL
TO LINE SIDE
Use this light start assist in case of a slight low voltage condition with equalized pressures prior to
compressor start.
NOTE: SOFT START ASSIST (PTCR) IS REQUIRED ON SOME HIGH EFFICIENCY COMPRESSORS
(SEE PAGE 12) EVEN WHEN THE SYSTEM EQUALIZES. "C" IN THE 8
IDENTIFIES COMPESSORS THAT REQUIRE PTCR START ASSIST. NOT REQUIRED WHEN A
START ASSIST KIT IS USED (RELAY, START CAPACITOR).
RUN
CAPACITOR
2
1
START
CAPACITOR
BLEED
RESISTOR
START
WINDING
RUN
CAPACITOR
S
START
WINDING
RUN
CAPACITOR
S
TH
-DIGIT OF MODEL NUMBER
Page 9
POTENTIAL
RELAY
LINE
5
LINE
LINE
PTCR