Unical MODULEX EXT Series Installation And Maintenance Instruction

35
Installation instructions
ENGLISH
In case of replacement of the Gas valve or
ignition di󰀩culties:
Tighten the maximum adjustment screw ”A”
clockwise up to the stop, then loosen by 7 turns.
Check the boiler ignition, in case of a block,
loosen the screw “A” again by one turn, then try
igniting it again. If the boiler still stops running,
perform the above operations again until the
boiler ignites.
Now adjust the burner as previously illustrated.
The following instructions are intended exclusively
for authorised service personnel.
3.13 - ADJUSTING THE BURNER
(S)
ADJUSTMENT SCREW
MAXIMUM OUTPUT
(R)
ADJUSTMENT SCREW
MINIMUM OUTPUT
- Remove the cap and insert the CO2 analysis sensor in the
ue gas sample point of the intake/exhaust terminal, see
chap. 3.12.2.
All boilers leave the factory already calibrated and
tested, however, if required, recalibrate the gas
valves (MODULE 1, MODULE 2, etc.)
2) Minimum output adjustment
- Operate the boiler in “calibration” mode at MINIMUM OUTPUT
(see 3.12.1)
- Once the burner is on, check that the “MINIMUM” CO2 output
value corresponds to what is indicated in the “NOZZLES -
PRESSURE” table.
- If necessary, adjust the value by turning (with a 2.5 mm hex
key) screw “R” CLOCKWISE to increase it, ANTICLOCK-
WISE to decrease it
(see NOZZLES-CAPACITY-PRESSURE table).
1) Maximum output adjustment
- Operate the boiler in “calibration” mode at MAXIMUM OUT-
PUT (see 3.12.1)
- Once the burner is on, check that the “MAXIMUM” CO2
output value corresponds to that indicated in the “NOZZLES
- PRESSURE” table.
- If necessary, adjust the value by turning the ‘’S’’ adjustment
screw CLOCKWISE to decrease it and ANTICLOCKWISE
to increase it
(see NOZZLES-CAPACITY-PRESSURE table).

Unical MODULEX EXT Series Specifications

General

Brand	Unical
Model	MODULEX EXT Series
Category	Boiler
Language	English