Diagram 3. Plumbing Connection
Diagram 4. Internal Water Pipework
INSTALLATION OF THE TPR VALVE
•
The T&P Relief valve is supplied with the water heater. This
is to protect the heater from excessive pressure and
temperature.
•
Seal the thread with the Teflon tape
– never use hemp.
•
Make certain the edge of the Teflon tape does not protrude
past the end of the thread. Screw the valve into the fitting
marked TPR and leave the valve outlet pointing down.
Tighten the valve using the spanner flats
– not the valve
body.
•
To minimise potential for scalding (particularly concerning
young children), a copper drain pipe must be fitted to the
TPR to carry the discharge away from the heater so that the
hot water discharged will not cause injury, damage or
nuisance. A drainpipe must be fitted for water discharge to a
floor waste trap (drain). The pipework from the TPR valve to
the floor waste trap should be as short as possible with no
restrictions.
•
½” (15mm) OD copper pipe is recommended. The pipework
should have no more than three (3) right angle bends, in a
continuous downward direction, and installed in a frost-free
environment.
•
DO NOT RESTRICT OR BLOCK THE OUTLET OF THE
DISCHARGE PIPE.
•
It is normal for water to drip from the TPR discharge pipe
during a heat up cycle.
•
Do not drill holes in the sides of this appliance. Any damage
caused by drilling will void the warranty.
•
This pipe must be left open to the atmosphere. The valve or
drain valve outlet pipe must not be sealed or blocked.
FILLING THE WATER HEATER
(by authorised person only)
•
Open all hot water taps in the house, including the shower to
release air in the pipelines.
•
Open the cold water inlet to the water heater.
•
When water flows from each hot water tap without any
presence of air, it means that the heater is completely filled
with water. Close all hot water taps.
•
Check all plumbing connections for leaks.
CONNECTION
– ELECTRICAL
(by authorised person only)
Warning! DO NOT turn on the electrical power supply to the
water heater until the water heater is completely filled with
water. There will be NO WARRANTY for dry firing of the
appliance.
•
All electrical work and permanent wiring must be carried out
by a qualified person and in accordance with the wiring rules,
all local codes and regulatory authority requirements.
•
The water heater shall be connected to single phase AC
supply and its rated power is 220-240V 50Hz. Refer to rating
label for input in wattage.
•
The storage water heater must be permanently connected to
the electricity supply through a double poles linked switch
having a contact separation of at least 3mm in all poles
incorporated in the circuit and out of reach from the person
using the shower.
•
Do not install this appliance near any possible contact with
water.
•
DO NOT CONNECT THE WATER HEATER WITH A PLUG
AND SOCKET.
•
The appliance must be earthed.
•
All wiring must conform to local requirements. Ensure the
household connecting wire rating is capable of withstanding
the appliance load. If in doubt, please consult a qualified
electrician.
•
For entry to the element cover remove ie two fixing screws.
Connect all ACTIVE and NEUTRAL wires as per the wiring
diagram provided on the inside of the element access cover.
Ensure the incoming EARTH wire is securely fixed to the
earth post provided in the heater case. Inspect and ensure
that all wiring links are secure prior to fixing the access cover
and turning the POWER on.
•
The water heater must be completely filled with water prior to
connection with power.
•
To ensure the Over-temperature and Energy Cutout is set,
press the Reset Button on the thermostat.
OPERATION
USING THE APPLIANCE
•
It is recommended that the cold water tap always be turned
on first when there is water demand. Likewise, the hot water
tap always be closed first to avoid scalding.
•
Mix the hot water with cold water by adjusting the taps to
your satisfactory requirement.
•
When the electrical thermostat cuts off, the stored hot water
can still be drawn for use in the household. The water
heater will automatically cut in when the stored water
reaches a minimum set temperature.
•
When the inlet water supply is interrupted, the main power
supply to the heater should be switched off to avoid dry
firing. Do not draw off hot water from the appliance to avoid
dry firing of an empty water heater.
Diagram 5.
Electrical Connection
of the Robertshaw “ST”
Thermostat/Thermal Cut-out
3