WarmFlow Utility U70HE, User Manual

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Page 58
8.3 Electrode Setting
8.4 Burner Start-Up Cycle
8.5 Air Damper Adjustment
The air damper is set in factory. This regulation is purely indicative. Each installation
however, has its own working conditions: actual nozzle output; positive or negative
pressure in the combustion chamber, the need of excess air, etc. All these conditions
may require a different air damper setting.
Air Damper (A)
– The main air damper can be set in
either of two positions. To set the positions of the damper,
proceed as follows: Remove the secondary air damper (B)
loosening the screws (). Loosen the screw (2) and rotate
the main air damper (A) to the required position. Retighten
the screw (2) and put back the secondary air damper (B).
Air Damper (B)
– The purpose of
this damper is to perform a fine-
tuning of the inlet air. Tuning of this
device is possible by turning the
screw (3).
Air Damper (A) – 15/21 Burner Only Air Damper (B)
~ 12s
Thermostat
Motor
Ignition Transformer
Valve
Flame
Lock-Out Lamp
~ 12s
Normal Lock-out due to failure to light
~ 5s
When removing or replacing the nozzle, move
the electrodes forward to avoid the risk of
damage. The electrodes are slackened by
unscrewing the brass post that passes from
the electrode holder out of the side of the
burner. When work is complete, ensure the
electrodes are reset as shown and secured
by tightening the brass post.