JOHNSON CONTROLS
12
FORM 160.43-NM4
ISSUE DATE: 11/12/2012
SECTION 2 - INSTALLATION
FIGURE 4 -
PRESSURE CONTROL LEFT SIDE
CUTAWAY
LD12522
4. Route the three LPCO control wires numbered 47,
48 and 49 through the 025 45742 LPCO control
conduit bushing.
5. Connect the wire numbered 47 to the 025 45742
LPCO control switch terminal labeled as COM-
MON. Refer to Figures 1, 3 and 4 and ECC Wir-
ing Diagram.
6. Connect the wire numbered 48 to the 025 45742
LPCO control switch terminal labeled as NOR-
MALLY CLOSED. Refer to Figures 1, 3 and 4
and ECC Wiring Diagram.
7. Connect the wire numbered 49 to the 025 45742
LPCO control switch terminal labeled as NOR-
MALLY OPEN. Refer to Figures 1, 3 and 4 and
ECC Wiring Diagram.
8. Use kit supplied wire tie-wraps (YORK p/n 025
09607 000) to bundle and/or secure LPCO control
wires numbered 47, 48 and 49 as needed.
9. Reinstall enclosure cover securing with the one
captive screw located on the front of the cover
Refer to Figures 2 and 3.
RETURN CHILLER TO SERVICE
1. Reverify that LPCO installation work performed
has been done completely and accurately and
chiller is ready to return to service.
2. Open the evaporator service valve having gauge
piping going to the “Cooler” (evaporator) panel
gauge and LPCO control.
3. Leak check all ECC and LPCO piping connec-
tions with ultrasonic leak detector. Correct any
leaks found before returning the chiller to service.
4. Replace ECC fuses 1FU, 2FU and 3FU.
5. Remove Lock-Out, Tag-Out from the chiller.
6. Turn on power source feed to the chiller Electron-
ic Control Center (ECC).