Unical AIREX 2S Series User Manual

33
Instructions for the installer
4.12 - FAULT FINDING FOR BOILER WITH
STANDARD CONTROL PANEL
WOOD FIRED BOILER:
Problem:
- The fan does not start
Remedy:
- Adjust the working thermostat (pos. 32) to maximum.
- Reset the safety thermostat (pos. 31).
Problem:
- The fan starts, but after 30 minutes it stops;
by switching OFF and ON the main switch (pos. 11) it re-starts.
Remedy:
- Increase the temporized relay’s intervention time
(this has to be done by the After Sales Service or by
authorized trained personnel after switching OFF the
mains supply).
Problem:
- When opening the loading door there are blowbacks
and flue formation.
Remedy :
- Open the door slowly.
- Use wood with a higher moisture content; make sure the boiler
does not remain unused for long periods (see paragraph 6.9).
- Use thicker wood logs.
- Use up all the wood before loading a new batch
Problem:
- The boiler does not reach the requested temperature.
The flame is small and there is too much air.
When the fire box is checked a formation of log bridges is found.
Remedy:
- Check the length of the wood logs (see paragraph 6.6).
- Check how the wood logs are loaded in the fire box (see
paragraph 6.6).
- Cut the logs in two parts (see paragraph 6.6).
- Use smaller logs (round or square, 5 to 7 cm diam. )
- Mix medium-large sized logs (15-20 cm diam.)with small sized
logs (see previous point).
Problem:
- The boiler does not reach the requested temperature. The
flame is too small.
Remedy:
- Check if the by-pass is closed.
- Check the fan
- Check if the doors are properly closed
If you cannot solve the problem, do no attempt
any other interventions and contact an
authorized UNICAL After Sales Service.

Unical AIREX 2S Series Specifications

General

Brand	Unical
Model	AIREX 2S Series
Category	Boiler
Language	English