Johnson Controls YEWS Series, Installation, Operation And Maintanance Instructions

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The corresponding of concentrations and freezing points of glycol solution
E.G wt%
5
10
15
Freezing point
℃
-1.4
-3.28
-5.31
E.G wt%
20
26
30
Freezing piont
℃
-7.8
-11.38
-14.04
The saturated temperature of R134a in difference pressure
Pressure kpa
164
171
178
185
193
201
209
Saturated temperature
℃
-15
-14
-13
-12
-11
-10
-9
Pressure kpa
217
225
234
243
253
262
272
Saturated temperature
℃
-8
-7
-6
-5
-4
-3
-2
Pressure kpa
282
293
304
315
326
338
350
Saturated temperature
℃
-1
0
1
2
3
4
5
Flow Switch
Verify a chilled water flow switch is correctly fitted in the
,
customer s piping on the cooler outlet, and wired into the
control panel correctly using shielded cable.
Control panel pwer supply
Make sure that the control panel is power on and the
display screen can display normarly.
Programmed Options
Make sure all the options factory-programmed into the
Microprocessor Panel are in accordance with the cust-
,
omer s order requirements by pressing relevant Keys on
the keypad (Refer to instructions on the operation of
control System on section 5).
Programmed Settings
Make sure all the setpoints are in accordance with the
operating requirements by operating keypad (Refer to
instructions on the operation of control System on section
5).The setpoints of the chilled water temperature or hot
water temperature should be set according to the Unit
model and working conditions.
Time and Date
Setting the time/date by pressing relevant function Keys
on the keypad (Refer to instructions on the operation of
control System on section 5).
Startup/Stop arrangement
Setting the Startup/Stop arrangement in ordianary days
and holidays via the corresponding function keys.
(Refer to instructions on the operation of control System
on section 5).
Setpoints
Setting the setpoints and control range of the chilled/hot
water temperature(Refer to instructions on the operation
of control System on section 5).
Now the chiller is ready to work.
YEWS-E Water Cooling Screw Chiller/Heat Pump
50