9
installation. Leave 30 cm of space underneath the water heater to allow easy access for
servicing.
2. Ensure the wall is strong enough to support the water heater. Bear in mind that the weight will
be the unit plus water, so the wall will have to be strong enough to support that combined
weight.
3. The heater must be installed using plugs and screws with sufficient lifting capacity and type
adapted to the wall; two on each hanger.
4. During the assembly, it is necessary to pay attention to the length of the power cord and the
distance to the power socket.
5. When installing the heater, it is necessary to pay special attention to the location of the
pressure relief valve, so that the discharge of expansion water from the pressure relief valve is
uninterrupted.
6. Measure and mark with a waterproof marker where you need to drill the holes for the plugs to
mount the water heater. Before drilling the holes ensure the holes are level using a spirit level.
Some water heaters come with a template to mark the holes. This template can be found
either inside the box or is printed on the box.
7. Drill holes, mount the plugs and fit the mounting bolts or screws (depending on the model).
8. Place the electric water heater onto the wall. Make sure it is fitted securely.
9. Tighten the mounting bolts or screws (depending on the model) solidly, so the electric water
heater is flush against the wall.
10. Cover ALL threaded fittings with Teflon tape to avoid water leakage. Turn the tape anti-
clockwise onto the threaded fitting. Use teflon tape on the threaded fitting waterproofing the
fitting. Some electric water heater brands have a special coating on the threaded fitting. You
can easily remove this coating by using a wire brush and then use the teflon tape and cover
the threaded fitting.
NEVER remove the polyurethane foam inner layer of the electric water heater found on both
the inlet and outlet of the electric water heater. This ensures the sealing of the electric water
heater
11. Now install the supplied 6 bar approved pressure relief valve or a KIWA approved 6 bar
pressure relief valve as close as possible to the water heater. The pressure relief valve must
remain open to atmosphere and never further away than 2 metres from the water heater.
Always install the pressure relief on the cold water inlet side of the water heater (the BLUE
marking).
IMPORTANT: Do not overtighten the pressure relief valve. If you overtighten you can damage
the safety valve inside or the valve inside can remain open. This will cause water hammer
leading to excessive calcification.
See picture 2.1 on how to install the pipeworks, pressure relief valve, stopcock, drain valve,
discharge pipe and fittings.
IMPORTANT: Use ONLY the supplied 6 bar pressure relief valve or a KIWA approved
pressure relief valve! If you DO NOT use one of these pressure relief valves your
warrantee will be void as a different pressure relief valve can damage the water heater.
12. There may be a small amount of dripping (expansion water) from the pressure relief valve
during the heating stage. This is completely normal. To allow this water to drain away
uninterruptedly ensure the following:
A. The supplied pressure relief valve:
You have to connect a plastic hose (supplied with your
water heater free of charge) to the orifice on the pressure relief valve facing downwards to
drain of expansion water uninterruptedly to a drain.
B. A KIWA approved safety relief valve:
If you have installed a KIWA approved safety relief valve,
install a discharge pipe (with our without a drain valve as pictured) directly below the pressure
relief valve to drain off any drops of expansion water. Install the discharge pipe connected to
the pressure relief valve facing downwards to drain of uninterruptedly.
C. A KIWA approved pressure relief valve and an expansion vessel:
You can opt to install an
expansion vessel and KIWA approved pressure relief valve to reduce water leakages from that
pressure relief valve as much as possible and to relieve pressure from the water heater.
13. Always install pressure and temperature resistant water pipes to the mains water supply line.
Connect both the hot water outlet and cold water inlet side of the electric water heater with
these pipes. DO NOT overtighten the connectors as you can damage the connection causing
water leakage.
14. Do not plug the power cord in yet as you have to fill the water heater first. See commissioning
(chapter 4)
