Figure 27 - Cooling Start Diagram; Figure 28 - Cooling Stop Diagram - York EX Series Installation, Operation & Maintenance Instructions Manual

SECTION 5 - COMMISSIONING
Turn on power source
Initialize self-check
mechanism
(1~2 min)
Remote or local
change over
Local
Local start operation
Chilled / hot water,
cooling water pump start
Chilled / hot water
and cooling water pump
(within 3 min.)
interlock ON?
Yes
Solution pump and
refrigerant pump start
Burner fan starts
Ignition sequence
Hold low
combustion
Time up
Temperature control
operation

FIGURE 27 - COOLING START DIAGRAM

80
Remote
Remote start operation
Air conditioning machine
and cooling tower fan
start
No
Abnormal warning
Stop Operation
Dilution operation starts
Burner stops
Combustion stops
1
Dilution operation
time increases
Chilled water or
Yes
refrigerant temp.
low cut-out
No
No
Dilution time up
Yes
HT-Gen.
No
pressure low
Yes
Solution pump/
refrigerant pump
stop
Chilled/hot water
cooling water pump
stop
Stop

FIGURE 28 - COOLING STOP DIAGRAM

FORM 155.32-ICOM1.EN.GB
ISSUE DATE: 10/13/2017
Solution and Dilution
refrigerant
operation time
pump stop stops increasing
Solution and
refrigerant pump
1
continue
Dilution operation
No
more than 30 min
Yes
Air conditioning machine
and cooling tower fan
stop
JOHNSON CONTROLS