BENSON OUH 2 100, Installation And Operating Manual

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4.0 Servicing.
S
ervicing must be carried out on a regular basis, the
maximum interval between services being 1 year.
Caution
In certain applications the frequency of servicing will have to
be increased , this to a large extent is governed by the
working environment.
Warning
It is a requirement that only suitably qualifi ed and competent
persons are allowed to undertake servicing.
Warning
Before any maintenance or servicing work is carried out the
heater must be shut down and allowed to cool, and have the
oil and electric supplies to it turned off at the supply valve and
isolator respectively.
Caution
Certain component parts are factory sealed and are designed
so as to be tamper proof. Usually such items do not require
servicing, and therefore should not be tampered with.
Caution
Failure to comply with this can invalidate any warranty, and
can also lead to premature failure.
The following parts fall within this category: room thermostat,
time clock, frost thermostat, sequential controller, and fan and
motor.
Reference should be made to the separate information
covering the operational details of the burner and timer.
Only approved spare/replacement parts can be fi tted, failure
to comply with this can compromise the safe and effi
cient
running of the heater, and can also invalidate any warranty
claim.
4.1 Planned Servicing
In order to maintain the effi cient operation of the heater it is
recommended that the following planned servicing and
preventative maintenance programme is adopted by the user.
Quarterly Inspection
(a) Visual inspection of the burner
(b) Clean and check spark electrode
(c) Clean and check photocell
(d) Check overheat safety is operational
Bi-Annual Inspection
(a) As per quarterly inspection, plus...
(b) Combustion check
(c) Smoke test
Annual Inspection
(a) As per half year inspection, plus...
(b) Heat exchanger and cleaning
(c) Electrical connections
(d) Main fan motor
(e) Oil supply including fi lter
(f) Burner
(g) Air delivery system
(k) Flue
4.2 Servicing Procedure - Major Component
Parts
4.2.1 Flue
A visual inspection should be carried out to ensure that the
fl ue remains adequately supported, both internally as well as
externally, and that the various joints are eff ectively sealed.
Inspection covers, where fi tted, should be removed and the
fl ue checked to see whether cleaning is require If inspection
covers are not fi tted the fl ue gas exit duct and fl ue spigot will
provide not only an indication of the cleanliness of the fl ue,
but will also enable access for cleaning.
The presence of the fl ue terminal should be checked. If a
condensate trap and drain facility is fi tted this should be
checked to ensure that it continues to function correctly, and
the drainage of condensates is not impaired.
4.2.2 Main Fan
Remove dust and other foreign matter by blowing off with
compressed air or through the use of a soft bristle brush.
Check that the bearings do not show signs of excessive wear.
It should be noted that these bearings do not require
lubricating.
.
4.2.3 Heat Exchanger
The heat exchanger requires a visual inspection at least once
per year, this should be accompanied by cleaning.
It is recommended that a fl ue brush and vacuum cleaner be
used to facilitate this.
Access to the heat exchanger is gained through the removal of
the rear fan, front louvres and opening the access door.
Servicing and cleaning should be performed as follows:
(a) Remove brass nuts and cover from heat exchanger end
assembly to expose heat exchanger tubes.
(b) Remove any accumulated deposits from the tubes by