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(2) Open the main fuel valve.
(3) The process to be followed is the same as mentioned in the cooling operation and the
chiller-heater is operated automatically.
Note : The refrigerant pump does not operate in heating operation. Refer to the Fig. 19 for
the stert-up order.
Start switch ON
Forced for operation
Air purge
Main fuel valve open
5.5.2 Stoppage
(1) Stoppage is proceeded the same order as the cooling operation.
Refer to Fig. 5.10 for the stoppage order of heating operation.
Start switch ON
Hot water thermostat ON
(with heating load)
Solution pump operation
Forced for operation
Igniting system
operation
Fig. 5.9 Heating Operation Flow Diagram (START)
Dilute operation
(Approx.20 min.)
Damper low
Combustion position
Fig. 5.10 Cooling Operation Flow Diagram (STOP)
Flame detection
Temperature
Control start
Igniting system
stop
39
N
Hot water flow rate
o
H.P. gen. Solution level
r
H.P. gen. Pressure
m Exhaust gas temperature
a Gas pressure
l
(Applied for gas fired type)
Solution pump stop
Main fuel valve close
Forced fan stop
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