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Gas
Gas regulator valve PT 825x, PT 833x, PT 840x, PT 850x, PT 880x
Special tool
Cap
Screw
Jet pressure adjustment
Only the special tool may be used for adjustment via the pressure regulator.
Loosen the locking bolts of the connection pressure and jet pressure measuring stub.
Loosen the locking bolt of the jet pressure measuring stub.
Check the connection pressure and jet pressure.
Remove the cap from the pressure regulator.
Fit the special tool to the nut of the pressure regulator.
Setting maximum pressure at full heating
Values for natural gas: see Table 6; values for liquid gas: see Table 7
To increase the maximum jet pressure, turn the lower ring on the special tool in a clock-
wise direction.
The nut of the pressure regulator is tightened by the special tool.
To reduce the maximum jet pressure, turn the lower ring on the special tool in a counter-
clockwise direction.
The nut of the pressure regulator is loosened by the special tool.
Adjusting the minimum pressure with power supply interrupted
Pull out the plug.
Hold the lower ring of the special tool steady and carry out the following steps.
The nut is held secure by the special tool.
20
Connection pressure
measuring stub
Nut
Plug
Pressure regulator
Jet pressure
measuring stub
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