15
NOTE:
The entire length of the vapor line, including the in-line filter-drier set, must slope
toward either the purge inlet or the chiller condenser. Avoid sagging of the tubing
where pockets of liquid refrigerant can condense and accumulate.
Pumpout Compressor Discharge Vent Line
When venting the pumpout compressor to the emission collection canister, or to the outdoor
atmosphere, or the chiller rupture disc vent line, it is important to use 3/8 -inch line size to
minimize pressure drop. For proper operation the pumpout com pressor discharge must be at
atmospheric.
Electrical Connections
WARNING:
Be sure to open and lock-out all electrical disconnects to prevent
possible injury or death caused by electrical shock.
The unit requires three power connections to the chiller's control circuit. The electrical
requirement is:
103-127 VAC, 50/60 Hz., 1-Phase 15 Amp Fused Circuit
NOTE:
Use Class 1, 14 AWG copper wire and metal conduit. All field installed wiring must
comply with all applicable NEC and local electrical codes.
Chiller “Run Signal” Wiring
1.
For the
typical
purge unit installation refer to Electrical Schematic
(Figure 8)
for
appropriate chiller
“Run Signal”
wiring.
2.
However, if the purge unit is being installed on a
YORK
chiller with either a
“Micro-Panel”
or
“Optiview”
panel you
MUST
wire the chiller “Run Signal”
to the purge unit according
to Electrical Schematic
(Figure 8A).
3.
This "Run" signal can be obtained by tapping into the chiller's hour meter power source, or
any other source that can provide a 115 VAC signal whenever the chiller is running. This
signal triggers the Circuit Board run input opto -isolator which enables purge operation.
WARNING: Failure to properly wire the chiller “Run Signal” on YORK chillers with
“Optiview” and “Micro-Panel” controllers could result in serious damage to the chiller.
Preliminary Checkout and Power-Up
1. Connect the 115 VAC main “hot line” from the fused purge output in the chiller control
panel to TB1-1 in the purge unit electrical box, and the 115 VAC “neutral” to TB1 -6 (see
Figures 8 and 8A on pages 51 and 52 for location of terminal connections). This power
line provides 115 volt power to the purge condensing unit, pumpout compressor, pumpout
solenoid valves and the control transformer.
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