Form 44201129
Oct 2019 rev A
13
A.
Combustion Air Adjustment (System Hot)
It is IMPORTANT to finally adjust the amount of combustion air to each burner in the system when the system
is operating at thermal equilibrium.
1.
Operate the system for 20 minutes to attain thermal equilibrium then adjust the amount of combustion air at
each burner by carrying out the procedures at 2 to 4 on each appliance in turn.
2.
Connect a suitable manometer (0.01mbar resolution) to the test nipple protruding from the rear panel of the
Control Box (adjacent to the Air Inlet Adaptor) as outlined in the separate installation and operation
instructions supplied with the heater.
3.
Reposition the adjustable gate of the appliance damper (after unscrewing the clamp screw) to attain a
negative pressure reading on the manometer of 0.65mbar ± 0.05mbar. Secure the adjustable gate in
position with the clamp screw.
4.
Finally check all the test points again to verify that the negative pressure at each of the burners is 0.65mbar
± 0.05mbar.
11.0)
SERVICING
It is essential that at least once a year, preferably before the heating season, a qualified person service the
appliance. In exceptionally dirty conditions, such as may occur in a foundry, more frequent servicing may be
desirable.
IMPORTANT:
A. Do not rest anything, especially ladders, against the appliance.
B.
Gas and Electricity supplies must be isolated before commencing servicing work or replacement of
components.
C.
Unless instructed to the contrary, re-assemble components in reverse order.
D.
Check all joints for gas soundness after carrying out any servicing of the appliance.
E.
On completion of a service/fault finding task which has required the breaking and remaking of electrical
corrections, the following checks, using a multi-meter must be made.
o
Earth continuity check
o
Polarity check
o
Resistance to earth check
1.
Exhaust Fan
Inspect the main impellor and secondary cooling impellor and remove any dust by brushing with a soft brush.
Remove any dust from the guard covering the secondary cooling impellor. Check that the impeller rotates freely
and that there is no excessive play in the bearings. The bearings are pre-lubricated and require no attention.
2.
Flue Pipes/Manifold
It is important that periodic sweeping of the flue is carried out according to the National or Local regulations in
force.
3.
Re-assemble and Commission
Re-assemble the appliance in reverse order and commission in accordance with the instructions contained in
Section 10.0.
4.
Auxiliary Controls
Room thermostats, time switches, frost thermostats etc should be checked to ensure correct functioning, and are
set to the user requirements.
