Nortek Reznor RHC DJL 8000, Установка, пусконаладка, обслуживание

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RHC 8000 EN April 2019 D301207 Issue C Page 33
8.3 Limit Control Fault Finding Chart (Limit Control Trips)
WARNING
Fault finding may only be carried out by appropriately qualified persons
Note: RHC 8000(M) air heaters are equipped with 2 limits (a recycling limit and a
manual reset limit). During normal operation, neither limit should trip even if the
main electric supply is interrupted during operation. In the event of motor failure,
the recycling limit will trip opening the gas valve.
no
yes
yes
no
yes
yes no
yes
no
no
yes
yes
no
Has any non-factory authorized air distribution
device been placed on the heater? Is there
excessive static pressure in the ductw ork? Did the
motor overload trip?
Does the fan control
energize the fan motor
in less than 75"?
Adjust thermostat
temp. setting above
ambient to energize fan
& gas solenoid valve
Replace
the motor
Consult fan
fault finding
Check for excessive
main burner pressur
Are filters
clean?
clean filters
Does the fan
motor operate?
Remove the
restriction
Does the limit trip
before the fan is
energized?
Place system in normal
operation
Consult fan
fault finding
Is there 220-240V at
terminals N and 4?
8.4 Fan Fault Finding Chart
Warning fault finding may only be
carried out by appropriately qualified
person
no
no yes
yes
Adjust thermostat temperature
setting above ambient to
energize the fan and the
fan solenoid valve
Does the fan
operate ?
Is there 220-240V
at terminals N &
4?
Replace the
fan start
relay
Replace fan
motor
Place the
system in
normal
operation