Checking the supply pressure and burner pressure
Instruction manual DR-RS
37
is
11. Use the pressure gauge to read the burner pressure at test nipple
. Refer
n
Remark
If the burner pressure is not correct and the water heater is fitted with a blank
plate, you will not be able to adjust the pressure. In this case, consult your
installer or supplier.
If the water heater is fitted with a burner pressure regulator, then the
pressure can be adjusted by following steps
through
.
12.
DR-RS 25, 40, 65 or 85
:
Adjust the burner pressure by turning burner pressure control adjusting
screw
, depending on the correction required:
-
Adjusting screw anticlockwise: burner pressure decreases.
-
Adjusting screw clockwise: burner pressure increases.
13.
DR-RS 105
Adjust the burner pressure by turning burner pressure control adjusting
screw
(Pg) using the supplied Allen key, depending on the correction
required:
-
Adjusting screw anticlockwise: burner pressure increases.
-
Adjusting screw clockwise: burner pressure decreases.
Warning
Adjusting screw Ps regulates the starting pressure. This need never AND
may never be adjusted!
14. Check the burner pressure against the value given in the table.
15. If the pressure setting is incorrect, then:
-
For DR-RS 25, 40, 65 or 85
repeat steps
and
until the correct
pressure is achieved.
-
For DR-RS 105
repeat steps
and
until the correct pressure is
achieved.
16. Shut down the water heater by putting the On/Off -switch to
position 0
.
17. Shut off the gas supply.
18. Disconnect the two pressure gauges and re-tighten the sealing screws in the
test nipples.
