126 YORK INTERNATIONAL
FORM 201.18-NM1 (102)
SWITCH 2: Ambient Temp. Low Limit
Open:
Standard Ambient Mode auto-programs the Low Ambi-
ent Cutout setting at 25°F (-4°C) and is not adjustable.
Closed:
Low Ambient Mode allows the Low Ambient Cutout
to be programmed from 0 to 50 °F (-18 to 10°C). Val-
ues above 25°F (-4°C) can be used to automatically
shut down the chiller when direct cooling methods be-
come operational.
SWITCH 3: Refrigerant
Open:
The R-407C Mode MUST be selected for models us-
ing refrigerant R-407C. Incorrect selection of this
switch may cause serious damage to the chiller.
Closed:
The R-22 Mode MUST be selected for models using
refrigerant type R-22. Incorrect selection of this switch
may cause serious damage to the chiller.
S1 - 2 AMB I ENT CONTROL
STANDARD
S1 - 2 AMB I ENT CONTROL
LOW AMB I ENT
S1 - 3 REFR I GERANT
R-407C
S1 - 3 REFR I GERANT
R-22
Dip Switch Physical Location and Setting
FIG. 51 – ENLARGED PHOTOGRAPH OF DIP
SWITCHES ON MICROPROCESSOR
BOARD
LD03511A
LD03511B
“OPEN” Position:
Left side of switch
pushed in
“CLOSED” Position:
Right side of switch
pushed in
Micro Panel Contents
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