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- Regulate the minimum pressure by turning nut "e", anticlockwise to reduce it and clockwise to increase it.
- Turn the burner off three or four times by closing and opening the gas cock, checking every time that the
pressure level corresponds to the new setting and that the burner ignites normally. If that is not the case, an
additional adjustment is required.
- Upon completing this procedure, check the maximum pressure level.
- Wait until the pressure reading in the manometer has stabilized.
- Carefully press all the way down the pin "f" and keep it pressed. If you wish to adjust the maximum pressure
setting, turn slowly the regulating nut "g", clockwise to increase it and counterclockwise to reduce it.
After adjusting the maximum and minimum pressure settings, reconnect the wires to the Modureg coil "c", re-
attach the pressure balancing pipe "h" and replace the protection cap "d". Now the water heater is set for
automatic operation. Remove manometer and check for gas soundness.
Note: If the "Modureg" coil fails to respond you must replace the complete "Modureg" unit. Any attempt to
replace only the coil might cause damage to the "Modureg" calibration.
Any adjustment made using the regulating screws should be carried out with caution.
g
e
h
Supplied By www.heating spares.co Tel. 0161 620 6677
d
f
c
b a
S.p.A.
Key
a) Inlet pressure test point
b) Burner pressure test point
c) Electric coil connection
d) Protection cap
e) Minimum pressure regulating screw
Fig. 11
f) Maximum pressure pin
g) Maximum pressure regulating screw
h) Pressure balancing pipe
17
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