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(b) If the current drawn is greater than the stated running
current, in most probability this will be caused by insuffi

cient

static pressure within the ductwork, in which case system
resistance should be increased through the introduction of a
damper placed as close to the start of the ductwork as
possible, thereby resulting in a reduction in drawn current.

The damper should be adjusted until the current is in
accordance with that stated on the data plate.

(c) If the current drawn is too low the duct outlet grilles will
require opening to reduce static pressure and increase air
volume, if this is not the case overheat cut outs can be caused.

Caution

The Fan Belts must be rechecked on completion of
commissioning ensuring that the tension is correct and
the pulleys are in alignment

3.4

Commissioning - hand over

(a) Upon full and satisfactory completion of commissioning,
a record of commissioning information (contact, date, etc)
should be left with the heater, a copy of which must also be
forwarded to the supplier (details on rear page)

(b) The commissioning engineer must ensure that the user is
familiar with the safe and effi

cient use of the heater, detailing

the function of all controls, and main components.

(i) Lighting, shutdown, and operational information.

(ii) Safety features, data plate, and labelling.

(iii) The requirement for regular inspection - especially if the
heater is within a more demanding environment - and the
need for regular servicing carried out by competent and
qualifi ed persons.

(d) Section 8 ‘User Instructions’ should be left with the
customer upon satisfactory completion of the commissioning
and hand-over.

Caution

After approximately 100 hours of running, the tension of the
fan belts must be checked to ensure that they are correct and
that they have not stretched. See section 4.2.5 for further
instructions.

4.0 Servicing.

ervicing must be carried out on a regular basis, the
maximum interval between services being 1 year.

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.

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