Commissioning,
Draining Down & Safety
14
6
Commissioning, Draining Down & Safety
6.1 Filling the Cylinder
IMPORTANT
Before filling the cylinder check that the
immersion heater has not loosened in
transit. Tighten as necessary using a
shaped spanner. Stillsons or pipe grips
should
not
be used.
1. Open all hot water taps.
2. Turn on the stop cock.
3. When water flows from all taps
close the taps.
4. Allow system to stabilise for five
minutes.
5. Open each hot water tap in turn to
expel air from the system pipe work.
6. Check for leaks.
7. Manually operate Temperature and
Pressure Relief Valve (17) - Figure
2-2, to ensure free water flow
through discharge pipe. (Turn knob
to left).
6.2 Draining Down
Switch the electrical power off
(important to avoid damage to element).
Isolate boiler from DuoWave Plus unit.
Turn off the cold water supply valve
(stop cock). Open hot water taps. Open
drain (21) - Figure 2-2. The unit will
drain.
6.3 Safety Cut-Out
1. The safety cut-out operates if:
a. Wiring is incorrect.
b. The immersion heater thermostat or
cylinder thermostat fails.
c. Thermostat is set too high.
2. Remember before resetting the
safety cut-out or altering the
thermostat setting, isolate electrical
supply to the unit prior to removal
of the electrical box lid.
3. Reduce thermostat setting and
press the reset button. After
adjustments are completed, ensure
the lid to the electrical box is
replaced correctly and the retaining
screw is fitted.
4. If the problem persists, please
contact your installer in the first
instance.
6.4 Hot Water Discharge from
Tundish
There are three reasons why hot water
will discharge from the tundish:
1. Thermal cut-out has malfunctioned.
2. The control thermostat has
malfunctioned.
3. The T & P valve is letting by.
In all cases, should a repair be
necessary, the work must be carried
out by a competent person.
Isolate the cylinder from all electrical
supplies before commencing
maintenance work.
6.5 Customer Handover
1. Explain the operation of the system
to the User, referring to Section 10
of these instructions.
2. In particular, make the User aware
of what to do if water is seen to
flow from either the T&P Valve.
Refer User to the Information given
in Section 10.
