Baxi LUNA HT 380 Notice D'installation Et D'entretien page 42

A
B
Fig. 35
This Boiler is set to work at 0 – 2,000 ft. If the boiler is to be used at a higher altitude (2,000 – 4,500 ft.) It is necessary to
make adjustments to the boilers fan speeds via the QAA73 as shown in Table 1.
CO max. heat input (%)
2
CO min. heat input (%)
2
Fan speed
(parameter 536) rpm
Fan speed
(parameter 613) rpm
CO Limit (ppm)
Table 1
This boiler's default control parameters are set to work with Gas A (Natural Gas) with a minimum gas working supply
pressure of 5.2" w.c. (13.0 mbar). However, the unit can be set to work with a working Gas A (Natural Gas) supply pres-
sure as low as 3.5" w.c. (8.8178 mbar) by following the conversions in table 1.2.
Note:
The boiler must be calibrated using a combustion analyzer.
Gas supply pressure
mbar in w.c.
12.0 4.8
11.0 4.4
10.0 4.0
9.0 3.6
Table 1.2
INSTALLATION AND SERVICING INSTRUCTIONS
Gas A (Natural Gas)
7.0 in w.c.
17.4 mbar
0 - 2,000 Ft
0 - 610 m
8.7
8.4
5,000
5,600
CO max. heat CO min.
2 2
input heat input
% %
8.6 8.4
7.7 8.4
8.1 8.4
7.4 8.4
42
Gas E (LPG Gas)
11.0 in w.c.
27.4 mbar
2,000 - 4,500 Ft 0 - 2,000 Ft 2000 - 4,500 Ft
610 - 1,370 m 0 - 610 m 610 - 1,370 m
8.7 10.0
8.4 9.8
5,400 5,000
5,400 5,600
< 400
Fan speed QAA73
(par. 536 and 613)
rpm
5,000
5,000
4,500
4,400
Fig. 36
Fig. 36
10.0
9.8
5,400
5,400
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