HAMWORTHY HEATING LTD
19
PUREWELL
Vari
Heat c
500001169/T
High Fire Target
Nat Gas 9.5% ±0.25% CO
2
If combustion level is outside of this range use the
Cross Head Throttle Screw to adjust the mixture.
T
HIS
SETTING
MUST
BE
CORRECT
BEFORE
CONTINUING
To increase the CO
2
level, turn the adjustment
anti-clockwise.
Figure 7.4.3.1 - Adjusting gas valve throttle
180c
Low Fire Target 95c & 110c -
Nat Gas 9.5% ±0.25% CO
2
140c -
Nat Gas 8.5% ±0.25% CO
2
If combustion readings are outside target range use Torx Bit
to make adjustments
To increase the CO
2
level, turn the adjustment clock-
wise.
Figure 7.4.4.1—Adjusting gas valve offset
Low Fire Target
Nat Gas 8.5% ±0.25% CO
2
If combustion readings are outside target range use
Torx Bit to make adjustments
To increase the CO
2
level, turn the adjustment
clockwise.
Figure 7.4.4.1—Adjusting gas valve offset
95c/110c/140c
180c
Low Fire Target
Nat Gas 9.5% ±0.25% CO
2
If combustion readings are outside target range use
Torx Bit to make adjustments
To increase the CO
2
level, turn the adjustment
clockwise.
Figure 7.4.4.1—Adjusting gas valve offset
70c
Summary of Contents for Purewell VariHeat 70c
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Page 43: ...HAMWORTHY HEATING LTD 37 PUREWELL VariHeat c 500001169 T Figure 8 3 11 Operating phases ...
Page 44: ...HAMWORTHY HEATING LTD 38 PUREWELL VariHeat c 500001169 T Figure 9 0 Boiler Wiring Schematic ...
Page 65: ...HAMWORTHY HEATING LTD 59 PUREWELL VariHeat c 500001169 T Figure E1 2 Typical Piping Layouts ...
Page 70: ...HAMWORTHY HEATING LTD 64 PUREWELL VariHeat c 500001169 T NOTES ...
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