Santon AH10/2.2 Guide

1
Installation and User Instructions
Aquaheat Unvented Water Heaters
Models: AH7/2.2, AH10/2.2, AH15/2.2
Please read and understand these instructions before starting work.
Please leave this leaet with the user following installation.
PACK CONTENTS
Heater, Pressure relief valve, Fixing screws and plugs, Installation and User
Instructions.
WARNING
This water heater must only be installed by qualied persons.
36005791 Issue 04

2
SECTION PAGE
1.0 INTRODUCTION 2
2.0 TECHNICAL SPECIFICATION 3
3.0 INSTALLATION 4
4.0 COMMISSIONING 9
5.0 EXPLANATION TO USER 10
6.0 MAINTENANCE 11
7.0 FAULT FINDING 13
8.0 SPARE PARTS 14
9.0 ACCESSORIES 14
10.0 GUARANTEE 15
11.0 ENVIRONMENTAL INFORMATION 15
12.0 SPARES STOCKISTS 16
This appliance can be used by children aged from 8 years and above and
persons with reduced physical, sensory or mental capabilities or lack
of experience and knowledge if they have been given supervision or
instruction concerning use of the appliance in a safe way and understand
the hazards involved. Children shall not play with the appliance.
Cleaning and user maintenance shall not be made by children without
supervision.
Thank you for purchasing an Aquaheat water heater. The unit is manufactured in the
UK to the highest standards and has been designed to meet all the latest relevant safety
specications. The Aquaheat units are designed to supply hot water for handwashing,
dishwashing and general purposes to cloakrooms, canteens and kitchen areas.
The Aquaheat water heater must be installed and commissioned by a competent
person. Please read and understand these instructions before installing. Following
installation and commissioning, the operation of the Aquaheat should be explained
to the user and these instructions left with them for future reference.
CONTENTS
1.0 INTRODUCTION

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Electrical rating 2.2kW @ 240V~ / 2.0kW@230V~
Capacities 7, 10 or 15 litres
Weight (full) 7 litre - 11.9 kg
10 litre - 15.9 kg
15 litre - 25.0 kg
Rated pressure 0.6MPa (6 bar)
Minimum inlet pressure 0.08MPa (0.8 bar)
Pressure Relief Valve 0.6MPa (6 bar)
2.0 TECHNICAL SPECIFICATION
Direct
Supplier’s name or trade mark
Supplier’s model identifier
7L
(2.2kW)
10L
(2.2kW)
15L
(2.2kW)
Storage volume V in litres 7.0 10.0 15.0
Mixed water at 40 °C V40 in litres 13 17 25
The declared load profile XXS XXS XXS
The water heating energy efficiency class of the model C C C
The water heating energy efficiency in % 31.3 30.6 30.8
The annual electricity consumption in kWh 589 603 599
Daily fuel consumption Q elec in kWh 2.860 2.940 2.920
The thermostat temperature settings of the water heater,
as placed on the market by the supplier
Specific precautions that shall be taken when the water
heater is assembled, installed or maintained and disposed
of at end of life
See Section 1 to 9
60°C
Aquaheat
Table:Technical parameters in accordance with European Commission regulations 814/2013 & 812/ 2013.
The HWA Charter Statement requires that all members adhere to the following:
• To supply t for purpose products clearly and honestly described.
• To supply products that meet or exceed appropriate standards and building and water regulations.
• To provide pre and post sales technical support.
• To provide clear and concise warranty details to customers

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WARNING: IF WATER FLOWS FROM THE PRESSURE RELIEF VALVE
OR TEMPERATURE / PRESSURE RELIEF VALVE (IF FITTED) THE
ELECTRICITY SUPPLY MUST BE SWITCHED OFF IMMEDIATELY.
CONTACT THE SANTON SERVICE TEAM (TEL: [phone] OR AN
APPROVED INSTALLER.
DIMENSION 7 LITRE 10 LITRE 15 LITRE
A 356mm 442mm 417mm
D 406mm 492mm 467mm
B 251mm 337mm 312mm
C 349mm 435mm 410mm
E 240mm 240mm 330mm
F 100mm 100mm 100mm
G 120mm 120mm 170mm
H 240mm 240mm 330mm
I 57mm 57mm 102mm
FIGURE 01: DIMENSIONS
E
G
I
H
F
A
B
C D
2 KEYHOLE
FIXING SLOTS
6mm WIDE
FIXING HOLE

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3.1 IMPORTANT INSTALLATION POINTS
3.1.1 The Aquaheat unvented water heater MUST be fitted with a Pressure
(Expansion) Relief Valve. This MUST be tted to the cold water supply near
the heater.
FAILURE TO PROVIDE ADEQUATE PRESSURE RELIEF WILL
INVALIDATE ANY GUARANTEE AND LEAD TO A DANGEROUS
INSTALLATION
3.1.2 Expansion can take place within the cold water supply
PROVIDED THAT BOTH
(a) Backow in the main is not prevented by any stopvalve with loose jumper,
check valve, pressure reducing valve or similar,
AND
(b) Hot water expansion does not enter a branch to a cold water outlet (see
Figure 2 for expansion pipe lengths).
NOTE: Both the above conditions must be met. Additionally expansion
within the cold water supply will not be possible if the static supply pressure
exceeds 4.1 bar (60p.s.i.).
3.1.3 If any of the conditions in 3.1.2 above cannot be met, expansion must be
accommodated using an Expansion Vessel. To ensure all expansion takes
place in the vessel a Non Return Valve must also be tted together with a
Pressure (Expansion) Relief Valve (see Figure 3). Use Accessory Pack ALK05
(94970012).
3.1.4 If the static supply pressure exceeds 4.1 bar (60p.s.i.) a Pressure Reducing
Valve must be tted to the cold main supply. If a Pressure Reducing Valve is
used an Expansion Vessel must also be used (see Figure 3). Use Accessorius
Pack ALK04 (94970011).
3.1.5 Where specications demand the tting of a Temperature/Pressure Relief
Valve, one can be tted on site (see Figure 4). Use Accessory Pack ALK06
(94970013). Note the tting of ALK06 does not alter the requirements detailed
in points 3.1.2 to 3.1.4 above.
3.1.6 National Wiring rules may contain restrictions concerning the installation of
these units in bathrooms.
3.1.7 The installation must be carried out in accordance with the relevant
requirements 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.
3.0 INSTALLATION

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N O TE: I F PRESSU RE RED U CI N G V A L VE
IS USED EXPANSION DOWN THE MAINS
I S N OT POSSI BL E
COLD
EXPA N SI O N
VESSEL
N EA REST CO L D
D RA W O FF
PRESSU RE
RED U CI N G
VALVE
SERVI CE
VALVE COLD
WA T ER
MAINS
FIGURE 04 : FOR INLET WATER PRESSURES ABOVE 0.41 MPa (4.1 BAR)
USING KIT ALK04 (94970011)
HOT
TO D RA I N
( W A STE)
PRESSU RE
(EXPANSION)
REL I EF V A LV E
AH07/2.2
AH10/2.2
AH15/2.2
N O N - RET U RN
VALVE
COLD
EXPANSION
VESSEL
NON-RETURN
VALVE
NEAREST COLD
DRAW OFF
SERVICE
VALVE COLD
WATER
MAINS
FIGURE 03 : FOR INLET WATER PRESSURES UP TO 0.41 MPa (4.1 BAR)
WHERE EXPANSION IN MAIN SUPPLY IS NOT POSSIBLE
USING KIT ALK05 (94970012)
HOT
TO DRAIN
(WASTE)
PRESSURE
(EXPANSION)
RELIEF VALVE
AH07/2.2
AH10/2.2
AH15/2.2
HOT COLD
N EA REST CO L D
D RA W O FF
SERVI CE
VALVE COLD
WA T ER
MAINS
2.0 (7L), 2.8 (10L) OR4.2 (15L) METRESIS
REQU I RED FO R EXPA NSI O N I N PI PEW ORK.
FIGURE 02 : FOR INLET WATER PRESSURES UP TO 0.41MPa (4.1 BAR)
NO ADDITIONAL KITS USED.
TO D RA I N
( W A STE)
PRESSU RE
(EXPANSION)
REL I EF V A LV E
AH07/2.2
AH10/2.2
AH15/2.2

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3.2 LOCATION
3.2.1. The unit should be vertically wall mounted using the screws and plugs provided.
Position the bottom two screws as shown in Figure 1 with heads 3mm from
the wall. Hang the heater and secure with the top screw. Alternatively it can
be oor mounted on it’s base. The water connections must always be to the
top of the unit.
3.2.2 Enough space should be left at the top above the unit for pipe connections and
access to the Temperature/Pressure Relief Valve (if tted). Refer to Figure 1
and the Dimensions Table to determine a suitable position for the heater.
3.2.3 NOTE: Ensure that the wall can support the full weight of the unit (see
TECHNICAL SPECIFICATIONS) and that there are no hidden services,
(electricity, gas, or water) below the surface of the wall.
3.2.4 DO NOT install where the unit may freeze.
3.3 TERMINAL COVER REMOVAL
3.3.1 To remove the terminal cover use a large at bladed screwdriver to relieve
the snaps located towards the front, at either side, of the cover. Gripping the
cover at the front, pull upwards.
3.3.2 To re t the cover, locate the hinge at the back. Slide the snaps into place.
Apply pressure to the front of the cover pushing back and down until it snaps
securely in place.
HOT
T&P VALVE
COLD
TO D RA I N
( WA STE)
FIGURE 05: TEMPERATURE AND PRESSURE RELIEF VALVE.
TO D RA I N
( W A STE)
CONNECTION TO
OU TL ET PI PE O F
AQUAHEAT WATER
H EA TER.
HOT WATER
OU TL ET PI PEW ORK
CONNECTION
D ETA I L O F T EM PERA TU RE
A N D PRESSU RE REL I EF V A LVE
PROBE
NOTE: THE FITTING OF ALKO6 (94970013) DOES NOT ALTER THE REQUIREMENTS OF POINTS 1.1 TO 1.4

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3.6 ELECTRICAL
WARNING: This appliance must be earthed. It is suitable for a.c. supply only.
Electrical installation must be carried out by a competent electrician and be in
accordance with the latest i.e.e wiring regulations.
Ensure the electrical supply is switched off before making any connections to the
water heater.
3.6.1 The unit is supplied tted with a 0.75m 3 core 1.5mm2 exible cable. The
electricity supply should be fused 13 Amp and be via a double pole isolating
switch with a contact separation of at least 3mm in both poles. Refer to the
gure 6 below.
3.6.2 The wires are colour coded as follows:
Green and Yellow EARTH
Brown LIVE (L)
Blue NEUTRAL (N)
3.4 PLUMBING
3.4.1 Refer to the section IMPORTANT INSTALLATION POINTS to determine
which valves and accessories are required. Plumb in the valves in the sequence
shown in the relevant Diagrams ( Figures 2, 3, and 4).
3.4.2 Both inlet and outlet pipes are clearly labelled. The pipes are 15mm copper
tube and are suitable for compression ttings. It is recommended that a WRAS
listed isolating valve (not supplied) is tted on the cold water supply to the
heater. Several hot outlets can be served.
3.4.3 Do not use solder joints as this will damage the heater and may prevent servicing
under warranty.
3.4.4 Plumbers Paste must not be used as it can impair the operation of the valves.
3.5 DISCHARGE
3.5.1 The discharge outlet from the Pressure (Expansion) Relief Valve and the
Temperature & Pressure Relief Valve (if tted) must be connected to a
discharge pipe. It is recommended that a tundish (not supplied) be installed in
the discharge pipe to give a visible indication that the valves are operating.
3.5.2 The discharge pipe must be installed in a continuously downward direction
and in a frost free environment.
3.5.3 The pipe from the valves to the tundish should be 15mm o/dia minimum. From
the tundish to the point of discharge the pipe should be 22mm o/dia minimum
and have a resistance to ow equivalent to 9 metres of straight pipe. Long
discharge pipe runs should have an increased internal diameter.
3.5.4 The pipe material should be capable of conveying water/steam at 100°C.
3.5.5 The nal discharge point should be in a safe, visible position.

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3.7 SETTING THE TEMPERATURE
3.7.1 The temperature should be set during installation by the installer.
3.7.2 The temperature can be set between the minimum setting (10°C) indicated
by a ‘1’ and the maximum setting (70°C) indicated by a ‘5’ by rotating the
dial on the thermostat.
3.7.3 It is recommended that the temperature is set above 60°C.
ELEM EN T
NEON
RESET BUTTON
EA RTH
POST
(STAT/CUT-OUT
PLUGS DIRECTLY
ONTO ELEMENT
TERMINATIONS).
DOUBLE POLE
ISOLATING SWITCH
BRO WN
BLUE
GREEN/ YELLOW
MAINS
SUPPLY
L
N
FIGURE 06 : WIRING DIAGRAM.
IM PORTANT: THE COMBINED THERMOSTAT/ CUT-OUT MUST BE PUSHED FULLY
HOME TO ENSURE CORRECT OPERATION OF THE CUT-OUT
CO M BI N ED
THERM OSTAT
& CUT-OUT
THERM OSTAT
PO CKET
ELEM EN T
TERM I N A L S
FL A RED EN D O F
THERM OSTAT
PO CKET
CO RRECT I N CO RRECT
INLET
OUTLET
CABLE CLAMP
EARTH POST
COMBINED THERMOSTAT
AND THERMAL CUT-OUT
FIGURE 7: CORRECT ORIENTATION OF ELEMENT PLATE ( VIEWED FROM TOP OF UNIT ).

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Following Installation and Commissioning of the water heater the operation should
be fully explained to the user:
5.1 HOT WATER
1. Indicate the location of the water heater and identify the outlets to which it is
connected.
2. Explain that the temperature is set upon installation and conrm the
temperature which the water heater is set at.
3. Explain that the indicator light will be illuminated when the unit is heating.
5.2 DISCHARGE
1. Explain that water may drip from the discharge pipe of the pressure relief
valves/s and that this pipe must be left open to atmosphere.
2. Explain that if water ows from any safety valve tted, the electrical supply
to the water heater should be switched off immediately. The electrical supply
should not be switched on again until the water heater has been checked and
approved by a qualied installer.
5.3 SYSTEM MALFUNCTION
1. Explain how to isolate electrical and water supplies incase of a fault.
2. Explain that a qualied plumber and / or electrician should be contacted if
there is a fault.
3. Explain how to identify / check basic faults.
5.4 SYSTEM MAINTENANCE
Explain the necessity to carry out regular maintenance of the water heater to ensure
it’s continued safe and efcient operation.
5.5 LITERATURE
Hand over the Installation and user instructions
5.0 EXPLANATION TO USER
4.1 Do not switch on the electrical supply until the unit has been lled with water
and checked for leaks.
4.2 Check that all installation, electrical and discharge pipe requirements have
been met.
4.3 Check that all water and electrical connections are tight.
4.4 Open a hot water tap, turn on mains water supply to the heater.
4.5 Allow unit to ll and leave hot tap running for a short while to purge any air
and ush out the pipework. Close the hot tap and check the system for leaks.
4.6 Manually test the operation of the Pressure (Expansion) Relief Valve and, if
tted, the Temperature/Pressure Relief Valve. Ensure water ows freely from
the valve(s) and through the discharge pipes.
4.7 Switch on the electrical supply. The indicator light will illuminate during
heating. When the set temperature is reached the indicator light will go out.
4.0 COMMISSIONING

11
WARNING: Disconnect from all electrical supplies before beginning any work on
the water heater. Water contained in the water heater may be very hot!
To ensure the continued safe and efcient operation of the water heater it should be
regularly maintained.
In in hard water areas the water heater will require periodic descaling.
Maintenance and servicing should be carried out by a competent person and any
replacement parts used should be authorized Santon spare parts.
6.1 RE SETTING THE THERMAL CUTOUT
6.1.1 Switch off and disconnect the electrical supply, turn off the water supply to
the unit and remove the terminal cover.
6.1.2 Press the thermal cut out ( see gure 7 ).
NOTE: If the thermal cut out continues to operate check the operation of the thermostat
and the element plate assembly.
6.2 DRAINING THE WATER HEATER
6.2.1 Switch off and disconnect the electrical supply. Turn off the water supply to
the unit.
6.2.2 Open a hot tap to relieve any system pressure. Disconnect the plumbing
connections to the unit and remove (note full weights of units). Empty unit
through the outlet connection.
6.2 DESCALING
6.3.1 Switch off and disconnect the electrical supply, turn off the water supply to
the unit and remove the terminal cover.
6.3.3 Disconnect the electrical terminations to the thermostat. Disconnect earth links
to the earthing stud.
6.3.4 Remove the element plate assembly by unscrewing the ve securing screws,
tapped jacking points are provided. Remove any loose scale from the container.
Carefully clean off any scale from the element and thermostat pocket. DO NOT
clean scale from interior container walls.
6.3.5 Re-t the element plate assembly using a new sealing gasket. Note the correct
orientation of the element plate by reference to Figure 8. Rewire the unit with
reference to Figure 6.
6.0 MAINTENANCE

12
6.4 SAFETY VALVES
The Pressure (Expansion) Relief Valve and, if tted, the Temperature/Pressure Relief
Valve should be operated regularly to remove lime deposits and to verify that it is not
blocked. Manually operate the valves by either twisting the cap or lifting the lever.
Ensure water ows freely from the valve(s) and through the discharge pipes. Ensure
the valve(s) reseat correctly when released.
6.5 EXPANSION VESSEL PRESSURE
6.5.1 The Expansion Vessel, if tted, should have a precharge pressure of 4.1 bar
(60 p.s.i.). This can reduce over time and eventually require re-charging. To
do this:
6.5.2 Turn off water supply to the unit; open a hot tap to relieve system pressure.
6.5.3 Remove dust cap from top of Expansion Vessel
6.5.4 Check pre-charge pressure using a tyre pressure gauge. If the pressure is lower
than 4.1 bar (60 p.s.i.) it should be recharged using a tyre pump (Schraeder
Valve type). DO NOT OVER CHARGE.
6.5.5 Re-check pressure and when correct replace dust cap.
6.5.6 Turn on mains water supply and close hot tap.
6.6 SUPPLY CORD
If the supply cord is damaged the water heater should be switched off until the
supply cord can be replaced by a competent electrician or a Heateam Engineer in
order to avoid a hazard.
6.3.6 To ret the cover, locate the hinge at the back. Slide the snaps into place. Apply
pressure to the front of the cover pushing back and down until it snaps securely
in place.
6.3.7 Re-commission the unit following the INSTALLATION and COMMISSIONING
instructions.
I N LET
OUTLET
CABLE CLAMP
EA RTH POST
COM BI N ED TH ERM OSTAT
AND TH ERM A L CU T-OUT
FIGURE 08: ELEMENT PLATE ORIENTATION

13
WARNING: Disconnect from all electrical supplies before beginning any work on
the water heater. Water contained in the water heater may be very hot!
The water heater should give trouble free operation, however should a problem
occur, the tables below should enable most faults to be identied with ease.
Fault Finding should be carried out by a competent person and any replacement
parts used should be authorised Santon spare parts.
7.0 FAULT FINDING
ACTION
POSSIBLE CAUSES
FAULT
1. Check electrical supply
1. Electrical supply fault
Water not heating
WiringDiagram, page 8)
replace thermostat/thermal cut-out (see
check thermostat operation. If necessary
2. Check cut-out, if operated reset and
2. Thermal cut-out tripped
necessary
3. Check thermostat operation, replace if
3. Thermostat fault
POINTS, page 4)
U2 (see IMPORTANT INSTALLATION
Fit Pressure Reducing Valve Pack U1 and
pressure
Excessive mains water
(continuously)
Pressure Relief Valve
Discharge of water from
INSTALLATION POINTS, page 4)
1. Fit Pack U2 (see IMPORTANT
possible
1. Expansion in mains not
(intermittently)
Presure Relief Valve
Discharge of water from
2. Fit Packs U1 and U2
4.1 bar (60 p.s.i.)
2. Mains pressure exceeds
3. Fit Pack U2 when using Pack U1
Pack U2
3. Pack U1 fitted without
4. Replace Pressure Relief Valve
4. Pressure Relief Valve Fault
(see Section 6.5)
Expansion Vessel pre-charge pressure
5. Check and, if necessary, re-charge
Expansion Vessel
5. Loss of pressure from
Replace thermostat and thermal cut-out
cut-out fault
Thermostat and thermal
Pressure Relief Valve
water/steam from
Relief Valve and or
Temperature/Pressure
Discharge of water from
in accordance with flow direction arrows
1. Check all valves are correctly installed
fitted
1. Inlet valves incorrectly
No water flow
2. Check mains water supply is on
turned on
2. Mains water supply not
fitted check the strainer is not blocked
3. Check for obstructions. If Pack U1 is
supply
3. Blockage in mains water
while.
milkiness will disappear after a short
oxygen bubbles when flowing. The
Water from a pressurised system releases
Oxygenated water
"Milky" water

14
WARNING: Disconnect from all electrical supplies before beginning any work on
the water heater. Water contained in the water heater may be very hot!
To ensure the continued safe and efcient operation of the water heater it should be
regularly maintained.
Maintenance and servicing should be carried out by a competent person and any
replacement parts used should be authorized Santon spare parts.
DESCRIPTION CODE No.
Element plate assembly - 7 litre 2.2kW 95 606 939
Element plate assembly - 10 litre 2.2kW 95 606 940
Element plate assembly - 15 litre 2.2kW 95 606 950
Combined thermostat/thermal cut-out 95 612 687
Indicator light 95 607 992
Element plate gasket 95 611 708
Pressure (Expansion) Relief Valve 95 607 986
Temperature/Pressure Relief Valve 95 605 854
Top cover moulding (7&10 litre) 95 614 272
Top cover moulding (15 litre) 95 614 276
Terminal cover (7&10 litre) 95 614 274
Terminal cover (15 litre) 95 614 275
8.0 SPARE PARTS
The heater can be used to supply several hot water outlets via conventional taps. It is not
recommended for supplying a shower. Individual site demands should be considered
when choosing capacity and the number of outlets to be served.
A Thermostatic Mixing Valve can be used in conjunction with this unit. Accessory Pack
ALK03 (94970010) is recommended. Follow the installation instructions supplied
with the valve for connection to the system.
9.0 ACCESSORIES

15
Santon products are manufactured from many recyclable materials.
At the end of their useful life they should be disposed of at a Local Authority Recycling
Centre in order to realise the full environmental benets. Insulation is by means of
CFC-free polyurethane foam.
This water heater does not contain substances harmful to health; it does not contain
any asbestos.
11.0ENVIRONMENTAL INFORMATION
This product is guaranteed against faulty materials and manufacture for a period of 2
years from the date of purchase provided that:
1. The unit has been installed in accordance with the Installation and User
Instructions and all relevant Codes of Practice and Regulations in force at
the time of installation, and that all necessary controls and safety valves have
been tted correctly.
2. Any valves and controls are of the Santon recommended type and
specication.
3. The unit has not been modied or tampered with in any way, and has been
regularly maintained as detailed in the Installation and User Instructions.
4. The unit has been used only for heating potable water.
The unit is not guaranteed against damage by frost, and the inner container with integral
immersion heater is not guaranteed against excessive scale build-up.
This Guarantee in no way affects the statutory rights of the consumer.
The policy of Santon is one of continuous product development and, as such, we
reserve the right to change specications without notice.
10.0 GUARANTEE

16
For the fast and efcient supply of spares, please contact the stockists listed below:
Electric Water Heating Co.
2 Horsecroft Place, Pinnacles,
Harlow, Essex CM19 5BT
Tel: [phone]
E-mail:[email protected]
SPD
Units 9 & 10 Hexagon Business Centre
Springeld Road, Hayes
Middlesex, UB4 0TY
Tel: [phone]
Parts Center
Tel: [phone]
www.partscenter.co.uk
Newey & Eyre
Unit 3 - 5 Wassage Way
Hampton Lovett Ind. Estate
Droitwich, Worcestershire WR9 0NX
Tel: [phone]
Fax: [phone]
UK Spares Ltd.
Unit 1155 Aztec West
Almonsbury Bristol, BS32 4TF
Tel: [phone]
Alternatively, contact your local supplying merchant or wholesale branch or use our
online stockist nder at www.interpartspares.co.uk
12.0 SPARES STOCKISTS
© 2010
Hurricane Way,
Norwich,
Norfolk, NR6 6EA.
www.santon.co.uk
Service tel: [phone]
e-mail:customer[email protected]