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Please read and understand these instructions prior to installing your
Express water heater. Particular attention should be paid to the section
headed IMPORTANT INSTALLATION POINTS.
Following installation and commissioning, the operation of the heater
should be explained to the customer and these instructions left with them
for future reference.
PACK CONTENTS
Heater, Spout, Valve, Fixing Screws and Rawlplugs, Fitting Instructions.
IMPORTANT INSTALLATION POINTS
1 The inlet must always be on the right.
2 In both undersink and oversink installations the inlet and outlet connections
must remain beneath the heater.
3 The outlet of this water heater acts as a vent and must not be blocked or
restricted in any way.
4 Use only Heatrae Sadia open outlet taps or spouts and valve.
5 The installation must be carried out in accordance with the relevant require-
ments of:
• The appropriate Building Regulations either The Building Regulations, The
Building Regulations (Scotland) or Building Regulations (Northern Ireland).
• The Water Fittings Regulations or Water Byelaws in Scotland.
POSITIONING THE WATER HEATER
1 Select a suitable site but check that:
a There is enough clearance under the heater to allow removal of the element
plate (210mm).
b When using the outlet spout, it will swing over the sink (or sinks) to be supplied.
c There are no hidden services where the wall is to be drilled.
2 Mark the position of the fixing holes (as shown in Fig.3).
3 Drill and plug the hole positions.
4 Screw in the top two screws leaving heads 3mm from the wall.
5 Hang the heater on the two top screws.
6 Screw in bottom screw to secure the heater.
SPOUT AND VALVE
1 Connect the control valve supplied to the inlet pipe on the water heater.
2 Connect the cold water main to the control valve using 15mm outside diameter
pipe (either copper to BS EN 1057 or stainless steel to BS 4127).
3 Push the outlet spout directly into the outlet fitting.
TO REMOVE OUTLET SPOUT
1 Push white ring upwards towards body of fitting.
2 Pull spout downwards.
PLUMBING REQUIREMENTS
1 The heater is designed to be connected directly to the mains via the valve provided
or Heatrae Sadia open outlet taps.
2 It is recommended that a WRAS listed isolating valve (not supplied) be fitted in the
water supply pipe to the heater to allow for servicing.
ELECTRICAL REQUIREMENTS
WARNING: This appliance must be earthed. It is suitable for a.c. supply only.
Disconnect the electrical supply before removing the cover. Installation must
be in accordance with the current local wiring regulations. A double pole
isolating switch, with a contact seperation of at least 3mm in both poles,
should be incorporated in the electrical supply. The supply should be fused 13
Amp. The nominal cross sectional area of the supply cable must be 1.5mm
minimum.
1 Remove terminal cover.
2 Strip the outer sheath and insulation on the cable to the required lengths, making
sure the outer sheath of the cable will be held in the cable grip when the
connections are made.
3 Loosen the top screws securing the cable grip.
4 Pass the cable underneath the cable grip and through the top moulding.
5 Make the connections to the terminal block as follows:
BROWN or RED to terminal marked "L"
BLUE or BLACK to terminal marked "N"
GREEN/YELLOW or GREEN wire to terminal marked
6 Secure the cable in the cable grip by tightening the two screws.
7 Set the adjustable thermostat by rotating the control to the required temperature.
8 It is recommended that it is set to lowest acceptable temperature to meet user
requirements. This will minimise the risk of scalding and reduce the level of scaling
in hard water areas.
9 Replace terminal cover.
OPERATION
DO NOT SWITCH ON HEATER UNTIL IT IS FILLED WITH WATER
1 Fill with water by opening valve and leaving open until a full bore of water flows from
the outlet.
2 Close valve and switch on water heater at double pole isolating switch. The heater
will heat the water to the temperature set on the thermostat.
3 Check water is heating correctly.
7 litre 3.0kW
- after 10 mins water temperature will increase by 60°c
7 litre 1.0kW
- after 10 mins water temperature will increase by 20°C
15 litre 3.0kW - after 10 mins water temperature will increase by 28°C
4 Pass instruction leaflet to user and draw his attention to the following two
statements:
a DO NOT USE HEATER IF THE WATER IS THOUGHT TO BE FROZEN
Switch off immediately at the isolating switch if the water does not flow freely.
Any damage resulting from freezing will not be covered by the
guarantee.
b DURING HEATING THE SPOUT/TAP WILL DRIP
This is due to the expansion of water inside the heater and is normal for
heaters of this type. It does not indicate that the valve is faulty and
overtightening of the valve can result in damage.
CABLE GRIP
2
CAPILLARY STAT
THERMOSTAT CONTROL
DRAIN PLUG
THERMAL CUT-OUT
MAINS S UP P LY
DOUB LE P OLE
IS OLAT ING S WIT C H
T HE R MOS T AT
te
INLET
OUTLET
TERMINAL BLOCK
ELEMENT
EARTH POST
Fig.1 - Internal Layout.
T E R MINAL B LOC K
B R OWN
L
R E D WIR E
N
B LUE
B LAC K WIR E
G R E E N/Y E LLOW
G R E E N/Y E LLOW
WIR E
E LE ME NT
T HE R MAL F US E
Fig.2 Wiring Diagram.
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