Rinnai REU-16 Service Manual page 21

Gas Pressure Setting
11.Check the burner test point operating pressure.
12. Remove rubber access plug and adjust the regulator
screw on the modulating valve (Fig. 4) as required to the
pressure below. Replace rubber access plug.
N.G G20
G25
LPG G30
G31
13. Set the Rinnai Infinity to 'Forced High'
combustion by setting no. 7 and no. 8
dipswitches to 'ON'. (Fig.5) Ensure maximum
water flow.
14. Check the burner test point pressure.
15. Adjust the high pressure potentiometer on
the Printed Circuit Board above SW1 (Fig. 6)
to the pressure shown below. The potentiome-
ter is very sensitive, turn no more than a few
degrees at a time; then let the pressure settle
down before turning it more.
N.G G20
G25
LPG G30
G31
16. IMPORTANT: Set dip switch no. 7 and no. 8
to 'OFF' to return the appliance to 'Normal'
combustion.
17. Close hot water tap.
18. Turn OFF the gas supply and 230V power
supply.
19. Remove pressure gauge, and replace sealing
screw.
20. Turn 'ON' the gas supply and 230V power
supply.
21. Operate unit and check for gas leaks at test
point.
22. Replace the front cover of the appliance.
1.8 mbar
1.8 mbar
2.2 mbar
2.2 mbar
9.0 mbar
9.0 mbar
14.2 mbar
14.2 mbar
21
Adjustment Point
off on
Fig. 5
High Press.
Potentiometer
Fig. 6
CAUTION
Fig. 4
SW
1
2
3
4
5
6
7
8