Setpoints Key - Quantech QTC4 STYLE A Series Installation Operation & Maintenance
Air-cooled screw liquid chillers with variable speed drive, 150 - 500 tons, 525 - 1750 kw, 2 compressor, 60 hz.
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SECTION 8 - MICROPANEL
Setpoints Key Operation
Cooling setpoints and ranges may be programmed by
pressing the SETPOINTS key. The first setpoint en-
try screen will be displayed as shown below. The first
line of the display will show the chiller default (DEF),
minimum acceptable value (LO) and maximum ac-
ceptable value (HI). The second line shows the actual
programmed value. Table 22 also shows the allowable
ranges for the cooling setpoints and Control Ranges.
Note that the Imperial units are exact values while the
Metric units are only approximate.
SETPOINTS
◄DEF XXXXX LO XXXXX HI XXXXX
LOCAL COOLING SETPOINT
Pressing the SETPOINTS key a second time or the ▼
(ARROW) key will display the leaving chilled liquid
Control Range, default, and low/high limits.
SETPOINTS
◄DEF XXXXX LO XXXXX HI XXXXX
LOCAL CONTROL RANGE
Pressing the SETPOINTS key or the ▼ (ARROW) key
a third time will display the remote setpoint and cool-
ing range. This display automatically updates about
every 2 seconds. This remote setpoint message is show
below:
132
SETPOINTS KEY
= XXX.X °F
= +/- X.X °F
SETPOINTS REMOTE SETPOINT = XXX.X °F
REMOTE CONTROL RANGE = +/- X.X °F
If there is no remote setpoint being utilized, the remote
setpoint value will be displayed as XXXXXX and the
remote Control Range will display XXX.
Pressing the SETPOINTS key or the Arrow key a
fourth time will bring up a screen that allows the Maxi-
mum Remote Temperature Reset to be programmed.
This message is show below:
SETPOINTS ◄DEF XXXXX LO XXXXX HI XXXXX
MAXIMUM REMOTE TEMP RESET
The values displayed under each of the key presses
may be changed by keying in new values and pressing
the (ENTER) key to store the new value into mem-
ory. Where more than one value may be keyed in on a
display, a portion of the data that does not need updat-
ing may be skipped by pressing the (ENTER) key.
The
(ENTER) key must also be pressed after the
last value in the display to store the data into memory.
The ▲ (ARROW) key allows scrolling back through
the setpoints displays.
FORM QTC4-NM1
ISSUE DATE: 4/2/2018
SETPOINTS
KEY
LD21850
= XXX.X °F
QUANTECH
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