Rothenberger ROTEST GW 150/4, Instructions For Use Manual, Page: 21 / 164

ENGLISH 19
5.3 Adjustment of gas admission pressure to atmospheric and blower burners using
water column up to 30 mbar
The following aspects must be taken into careful consideration:
– The water tank (2) must be filled to zero point pursuant to the scale found on
the inside of the case lid (overflow).
– Check all connections to and within the test system before continuing with
testing procedures. Ensure that all connections are properly locked and
gastight.
Complete test as follows:
Î Close all cut-off valves on your ROTEST GW 150/4.
Î Insert connecting hose
(6)
to
connecting valve B
. An auditable sound is heard when hose
and valve nipple are properly locked.
Î The fixed tube element
(7)
up to 30 mbar is sufficient for this test type.
Î Connect gas appliance adapter (21) to the open end of the connecting hose (6).
Î Connect the snout of the gas appliance adapter (21) to the test supply system of the gas
appliance.
Î Set the gas appliance burner to the highest possible setting.
Î Open
connecting valves B
and
D
.
Î While gas is flowing to the burner valves, it presses against the water column in the fixed tube
element
(7)
through the gas appliance adapter
(21)
and the connecting hose
(6).
Î Read the actual gas admission pressure from the scale
(11)
inside the case lid.
Î By turning the adjustment screw on the burner, the gas admission pressure can be regulated
until the water column indicates the pressure value recommended by the gas appliance
manufacturer.
Connecting valve B
6 Connecting hose
21 Adapter for gas
appliance
Connect to test supply for
gas admission pressure
of gas burners
Connecting valve C
Connecting valve D
Connecting valve A