Yazaki CH-K100, Operating Instruction

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6
Unit Size
THRP Settings (amps)
208v 230v
K30 3.0 2.8
K40 4.5 4.0
K50 4.5 4.0
K60 6.0 5.5
K80 6.0 5.5
K100 6.0 5.5
Figure 6
– SOLUTION PUMP THERMAL OVERLOAD
CONTROL ADJUSTMENTS
The leaving chilled water temperature is
controlled to a standard rating point of
44.6°F
(7°C)
. The operating dead band of
Low Fire is 3.6°F
(2°C)
. The Low Fire dead
band is not adjustable. The operating dead
band of High fire is 7.2°F
(4°C)
. The High
Fire dead band can be cut in half by setting
Dip Switch 2 on the I/O Board to ON. The
leaving chilled water temperature can be
adjusted using the TC potentiometer on the
CPU Board. The leaving chilled water set
point can be set in a range of 40.1°F
(4.5°C)
to 59.9°F
(15.5°C)
.
Similarly, the leaving hot water standard
rating point is 131°F
(55°C)
. The Low Fire
dead band and High Fire dead bands are
identical to Cool mode, but the High Fire
dead band can be cut in half by setting Dip
Switch 4 on the I/O Board to ON. The
leaving hot water temperature can be
adjusted using the TH potentiometer on the
CPU Board. The leaving hot water set point
can be set in a range of 122.9°F
(50.5°C)
to
140.9°F
(60.5°C)
.
Figure 7
– TEMPERATURE CONTROL ADJUSTMENTS