56
Item
Contents
Checking Procedure
Frequency
Semi-
annually
or more
Annuall
y
or
more
Safety
Devices
Main fuel valve
(Shut-off valve)
Check valve action and confirm function
at misfire. Check if gas passes through
the shut-off valve with gauge or bubble
test in the water especially at time of initial
running
○
Pilot solenoid valve
(applied for gas fired
type)
Check insulation of coil and leak through
the valve
○
Combustion
Monitoring device
Measure ampere, response time for the
flame detector. Clean the glass of the
flame detector
○
Gas pressure switch
(High and low)
(applied for gas fired
type)
Check the deviation between actuation
and setting point by changing gas
pressure or setting point
○
Air
flow
pressure
switch (applied for gas
fired type and for oil
type with proportional
control)
Check actuation by increasing resistance
at the blower suction
○
Pressure gauges
Check indication point and zero point
○
High temperature and
high pressure switch
Check
actuation
and
actuating
temperature and pressure
○
Combustion program
time
Check setting point and actual actuating
time of the timer
○
Exhaust
gas
temperature
Check actuation and setting point of
temperature protection function
○
Summary of Contents for HDFN-80-1400
Page 11: ...11 Fig 1 1 External View of Chiller heater...
Page 16: ...16...
Page 20: ...20 Fig 3 5 Operation Flow Chart...
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Page 66: ...66 Fig 8 Lithium Bromide Temperature Specific Gravity Concentration Curve...
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