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YORK INTERNATIONAL
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This mode of control is based on suction pressure for
each individual system. This mode of control will only
be available if Condensing Unit was selected under Op-
tion 3 - Unit Type. It should be noted that this mode
of control requires suction transducers, which are
optional on some models, and field installed zone
thermostats.
Refer to section on Capacity Control for details on load-
ing and unloading sequences.
• Option 7 – Units Type:
Display messages will show units of measure in Impe-
rial units (°F or PSI).
– or –
Display messages will show units of measure in SI units
(
°
C or Bar).
When Display Units are programmed
for SI, the readout on the display will
be “rounded” and not display the ex-
act value.
• Option 8 – Lead/Lag Type (two systems only):
SYS 1 selected as lead compressor.
– or –
SYS 2 selected as lead compressor.
– or –
D I S P L A Y
U N I T S
I M P E R I A L
D I S P L A Y
U N I T S
S I
L E A D / L A G
C O N T R O L
M A N U A L
S Y S
1
L E A D
L E A D / L A G
C O N T R O L
M A N U A L
S Y S
2
L E A D
A B C D E F G H I J K L M N O P Q R S T
1 2 3 4 5 6 7 8 9 0 ° , . / % - ( ) * X
A B C D E F G H I J K L M N O P Q R S T
1 2 3 4 5 6 7 8 9 0 ° , . / % - ( ) * X
• Option 4 – Ambient Control Type:
The low ambient cutout is adjustable from 25°F to 60°F
(-3.9°C to 15.6°C).
– or –
The low ambient cutout is programmable down to 0°F
(-17.8°C). A low ambient kit MUST be installed for
this option to be chosen.
• Option 5 – Local/Remote Control Type:
When programmed for LOCAL, an ISN or RCC con-
trol can be used to monitor only. The micropanel will
operate on locally programmed values and ignore all
commands from the remote devices. The chiller will
communicate and send data to the remote monitoring
devices.
– or –
This mode should be selected when an ISN or RCC
control is to be used to control the chiller. This mode
will allow the ISN to control the following items: Re-
mote Start/Stop, Cooling Setpoint, Load Limit, and His-
tory Buffer Request. If the unit receives no valid ISN
transmission for 5 minutes, it will revert back to the
locally programmed values.
• Option 6 – Unit Control Mode:
Unit control is based on discharge air temperature. This
mode of control will only be available if Condensing
Unit was selected under Option 3 - Unit Type.
L O C A L / R E M O T E
M O D E
R E M O T E
A M B I E N T
C O N T R O L
S T A N D A R D
A M B I E N T
C O N T R O L
L O W
A M B I E N T
L O C A L
/
R E M O T E
M O D E L
L O C A L
C O N T R O L
M O D E
S U C T I O N
P R E S S U R E
C O N T R O L
M O D E
D I S C H A R G E
A I R
Unit Controls
Summary of Contents for MILLENNIUM YCUL0016SC
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