- 58 -
GAS CONVERSION
3 - GAS/CO
2
/CO/NO
X
FLOW CONTROL
Combustion control is carried out on the boiler
through the opening (23) provided for this purpose
after the cap is removed. This opening must be
closed again after checking.
- To commission the burner:
• Activate the regulator shut-down function -
cleaning key (6) (Chapter III - OPERATION
section. 3.11 - page 24) :
. the code
flashes on the dis-
play screen (13),
- Gradually position the d.h.w. potentiometer (3) to
the maximum on the right:
• the burner switches to max. rate,
- Gradually move the
V
adjustment screw of the
gas unit (fig. 60) to obtain a stable flame.
- Check the CO
2
/CO ratio (see setting table sec-
tion 3.2 - page 59),
- Set the d.h.w. potentiometer (3) to the maximum
on the left:
• the burner switches to the minimum rate,
- Check the CO
2
/CO ratio (see setting table sec-
tion 3.2 - page 59),
- If necessary:
• adjust screw
K
(fig. 60) (tightening and untigh-
tening increases and decreases gas flow).
Before starting the minimum rate set-
ting (V and K screws), wait for a stable
CO
2
/CO analyser read-out. Repeat
switching from the minimum rate to
the maximum rate several times to en-
sure that the setting has been done
properly.
3.1 - Surveillance procedure
23
j
bar
auto
function
Info
°C
Reset
6
11
13
3
THI-83-0
O
I
Fig. 62
!
Summary of Contents for THI 5-25c
Page 62: ... 77 NOMENCLATURE THI 5 25 C ...
Page 65: ... 98 NOMENCLATURE CONTROL BOX ...
