Thermann Owner’s Manual
4 Star Gas Hot Water Heater
8
H4127 Rev. B
Gas Connections
Filling the Water Heater
the water heater must be filled with
water before lighting.
open all hot water taps. open isolating
valve at the cold water inlet slowly and
allow water heater to fill until water
flows through the system. Close each
hot water tap after the air is expelled
from its line.
open the PtR Valve for approximately
10 seconds by lifting the lever on the
valve to ensure water is relieved to
waste through the relief drain pipe.
lower lever gently and check that it
closes correctly.
Thermostat and
gas control knob
Igniter
Lighting the Water Heater
Instructions for lighting procedure are
on the inside of the access cover and
shown below:
1. turn the knob fully clockwise to
the “•” (off) position.
2. Wait five (5) minutes so any build-
up of unburnt gas can escape.
3. turn the knob to the
(pilot)
position.
4. depress the knob fully (until
disappears below housing) and
after thirty (30) seconds, whilst
keeping the knob depressed,
repeatedly press the igniter button
(for up to 40 seconds) until the
pilot flame ignites.
Note:
It is not possible to depress
the knob fully if the gas control
has activated its safety shut-
off feature. In this case, wait 60
seconds for the gas control to
reset.
5. Keep the knob depressed for
twenty (20) seconds after the pilot
flame lights. the pilot flame can
be observed if a mirror is placed
directly below the pilot assembly.
6. Release the knob and check if the
pilot is still alight.
