York MILLENNIUM YCAL0043SC, Руководство пользователя, Страница: 69 / 133

YORK INTERNATIONAL
69
FORM 150.62-NM2
This message indicates that the cooling setpoint is un-
der REMOTE control. When under remote control, the
cooling setpoint will be determined by a remote device
such as an ISN control. The message also indicates that
the control point is based on LEAVING water tempera-
ture out of the evaporator.
This message indicates that the cooling setpoint is un-
der REMOTE control. When under remote control, the
cooling setpoint will be determined by a remote device
such as an ISN control. This message also indicates
that the control point is based on RETURN water tem-
perature into the evaporator.
Immediately after the control mode message is dis-
played, the COOLING SETPOINT entry screen will be
displayed. If the unit is programmed for LEAVING liquid
control the following message will be displayed:
(leaving chilled water control)
The above message shows the current chilled water tem-
perature SETPOINT at 45.0°F (notice the cursor posi-
tioned under the number 5). Pressing either the UP or
DOWN arrow will change the setpoint in .5°F increments.
After using the UP and DOWN arrows to adjust to the
desired setpoint, the ENTER/ADV key must be pressed
to enter this number into memory and advance to the
RANGE SETPOINT.
This will be indicated by the cursor moving under the
current RANGE setpoint. The UP and DOWN arrow keys
are used to set the RANGE, in .5 °F increments,to the
desired RANGE setpoint. After adjusting the setpoint,
the ENTER/ADV key must be pressed to enter the data
into memory.
Notice that the RANGE was programmed for +/- X.X° F.
This indicates the SETPOINT to be in the center of the
control range. If the control mode has been programmed
for RETURN LIQUID control, the message below would
be displayed in place of the previous message.
(return chilled liquid control)
Notice that the range no longer has a +/- X.X °F , but
only a + X.X °F RANGE setpoint. This indicates that the
setpoint is not centered within the RANGE but could be
described as the bottom of the control rangeA listing of
the limits and the programmable values for the COOLING
SETPOINTS are shown in Table 27.
The SETPOINT and RANGE displays just described
were based on LOCAL control. If the unit was pro-
grammed for REMOTE control (under the OPTIONS
key), the above programmed setpoints would have no
effect.
Both LEAVING and RETURN control are described in
detail under the section on Capacity Control.
R E M 0 T E L E A V I N G
W A T E R T E M P C O N T R O L
S E T P O I N T = 4 5 . 0 ° F
R A N G E = +/- 2 . 0 ° F
R E M O T E R E T U R N
W A T E R T E M P C O N T R O L
S E T P O I N T = 4 5 . 0 ° F
R A N G E = + 2 . 0 ° F
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