York YCAS0098EB, Installation Operation & Maintenance, Page: 145 / 184

145
JOHNSON CONTROLS
FORM 201.18-NM7
Closed:
Low Ambient Mode allows the Low Ambient Cut-Out
to be programmed from 0 to 50 °F (-18 to 10°C). Values
above 25°F (-4°C) can be used to automatically shut
down the chiller when direct cooling methods become
operational.
SWITCH 3: Refrigerant
Open:
The R-407C Mode MUST be selected for models using
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.
SWITCH 4: Unit Type
Open:
S 1 - 4 U N I T T Y P E
Y C W S
Set this switch to Open if the chiller type is YCWS.
Closed:
S 1 - 4 U N I T T Y P E
Y C A S
Set this switch to Closed if the chiller type is YCAS.
S 1 - 2 A M B I E N T C O N T R O L
L O W A M B I E N T
S 1 - 3 R E F R I G E R A N T
R - 4 0 7 C
S 1 - 3 R E F R I G E R A N T
R - 2 2
8
SWITCH 5: Motor Current Averaging
Open:
S 1 - 5 M O T O R C U R R E N T A V E R A G I N G
D O N O T U S E
If do not use “motor current averaging”, set this switch
to Open.
Closed:
S 1 - 5 M O T O R C U R R E N T A V E R A G I N G
A V G. D I S A B L E
If need to disable “motor current averaging”, set this
switch to Closed.
SWITCH 6: Heat Recovery
Open:
S 1 - 6 H E A T R E C O V E R Y
D I S A B L E D
Set this switch to Open if no “heat recovery” or do not
need to use it.
Closed:
S 1 - 6 H E A T R E C O V E R Y
E N A B L E D
Set this switch to Closed if chiller with “heat recovery”
and need to use it.
SWITCH 7: Exp. Valve Type
Open:
S 1 - 7 E X P. V A L V E T Y P E
T H E R M O S T A T I C
If TXV is used, set this switch to Open position.
Closed:
S 1 - 7 E X P. V A L V E T Y P E
E L E C T R O N I C
If EEV is used, set this switch to Closed position.
SWITCH 8: Spare