Section 7: Overheat Protection Device
Overheat protection is fitted in case the air flow falls below the minimum
necessary for safe operation of the heater, which may be caused by failure of the
supply fan motor or belt failure, dirty filters or inlet damper failure. If the air flow
falls too low, the high limit will trip out and will require manually resetting. If this
happens on a regular basis it must be investigated by a competent registered
engineer as this could cause serious damage to the heater.
WARNING!
If the heater has a Honeywell combined thermostat installed then the jumper
link must be removed from the replacement thermostat.
Heat exchanger damage may be the result.
Failure to follow these instructions can result in death, injury, property
damage or product damage.
Honeywell overheat stat Fig 2
Overheat
Position
Fig
3
Ensure that the fan and limit settings are as follows:-
Fan On
35ºc
Fan Off
25 ºc
Limit
20 ºc above normal running temperature no greater than 100 ºc
10
