Rinnai HD70e - Manual (Page 28)

28
GAS PRESSURE SETTING
11.Adjust the regulator screw on the modulating
valve (fig. 4) as required to the pressure
below.
12.Lock the regulating screw on the modulating
valve.
13.Set the appliance to 'Forced High' combustion
by setting both no. 2 and no. 3 dipswitches of
the bottom set of switches (SW3) 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 below SW3 to the
pressure shown below. The potentiometer is
very sensitive, turn no more than a few
degrees at a time; then let the pressure settle
down before turning it more.
16.IMPORTANT: Set dip switch no. 2 and no. 3
on the bottom set of switches (SW3) 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.
N.G 1.8 mbar
Propane 3.5 mbar
N.G 7.4 mbar
Propane 17.6 mbar
CAUTION
2
3
O
F
F
ON
SW3
fig.4
fig.5
SW2
SW3