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- THR 5-25 M 75:
• It can be modified for Propane (G31) by remo-
ving the burner (set according to fig. 28) (see
the Propane kit X90.23481 technical instruc-
tions for the adjustment).
• Check the combustion parameters (§ 2 - 3 -
Chapter V - COMMISSIONING) and proceed
to the adjustment of the gas valve according to
the process § 5 - Chapter V - COMMISSIO-
NING.
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JDV +
- THR 5-25 M 75:
• It can be modified for natural gas by removing
the burner (set according to fig. 27) (see the
natural gas kit X90.26473 technical instruc-
tions).
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- Select the regulator off position ("7" flashing ap-
pears on the display - § 3 - Chapter III - OPERA-
TION), then switch the burner to maximum rate.
Potentiometer (item 1, fig. 4) at right hand stop
point.
- Gradually turn the adjusting screw
9
of the gas
valve (fig. 27 or fig. 28) to obtain a steady flame.
Then check the CO
2
/CO rate against the table
§ 3 - Chapter V - COMMISSIONING (the gas flow
is increased by turning and vice versa).
- Set the potentiometer (item 1, fig. 4) to the left
hand stop point (burner at minimum rate). Then
check the CO
2
/CO. If necessary, gradually turn
screw
.
(fig. 27 or fig. 28) (the gas flow is in-
creased by turning and vice versa).
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Parametre V changes the slope of the servo-control
characteristic curve.
Parameter K offsets it without changing the slope.
Only adjust V at max. rate and K at min. rate.
Check the airtightness of the gas circuit after servi-
cing.
V
K
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Gas valve
O-ring
Fit ting the gas reducer
For propane adju stment :
Gas reducer
5,80
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Propane set THR 5-25 (factory setting)
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