Baxi POWER HT+ Series Installation And Service Manual

7
7.4.4 Gas valves
1
Gas flow rate setting screw
2
OFFSET setting screw:
Remove the plug
Use a 4 mm hexagonal spanner
3
Gas supply pressure outlet
1
Gas flow rate setting screw
2
OFFSET setting screw:
Remove the plug
Use a flat-blade screwdriver
3
Sealed chamber pressure signal
4
Gas supply pressure outlet
Tab.23 Settings values for a new gas valve on POWER HT +
The settings screw is screwed down as far as it will go and is then is un
screwed according to the number of turns given in the following table.
Boiler model Nominal heating flow
rate:
Number of turns for the
gas flow rate settings
screw
Minimum heating flow
rate:
Number of turns for the
OFFSET settings
screw
POWER HT+ 1.50 12 5 + 3/4
POWER HT+ 1.70 13 5 + 3/4
POWER HT+ 1.90 2 + 2/3 5 + 3/4
POWER HT+ 1.110 2 + 1/3 5 + 3/4
7.4.5 CO
2
checking and setting values
Tab.24 Checking and setting values for gas type G20
Unit POWER HT+ 1.50 POWER HT+ 1.70 POWER HT+ 1.90 POWER HT+ 1.110
Diameter of the Venturi mm 24 30 34 38
Diameter of the nozzles mm 3.70 (no. 2) 5.30 (no. 2) 5.60 (no. 2) 6.40 (no. 2)
Minimum CO
2
(1)
% 8.5 8.5 8.5 9.0
Maximum CO
2
(1)
% 9.0 9.0 9.0 9.2
Maximum CO ppm < 250 < 250 < 250 < 250
(1) The CO
2
value is valid with the front panel mounted. If the front panel is removed (open chamber), the value readout is lower by 0.2%.
Fig.66 POWER HT+ 1.50 – POWER HT+
1.70
MW-3000045-01
1
2
3
Fig.67 POWER HT+ 1.90 – POWER HT+
1.110
MW-3000047-01
3
1
2
4
7 Commissioning
62 7609474 - v02 - 04092014

Baxi POWER HT+ Series Specifications

General

Brand	Baxi
Model	POWER HT+ Series
Category	Boiler
Language	English