Hyco Speedflow SF10SS Fiche technique
Product Instruction Manual
Speedflow
SF10SS, SF15SS, SF1012SS &
SF1512SS
Stainless Steel
Undersink unvented water heater
V20.1.3
E
2
Thank you for purchasing a Hyco Speedflow unvented water heater.
The Speedflow is ideal for use in cloakrooms and kitchens in offices, shops,
student accommodation and domestic premises which have been extended
and there is no central hot water system nearby. One unit located under
the kitchen sink is often used to supply hot water for light dishwashing in
the kitchen sink and hand washing in the cloakroom basin. Please read and
understand these instructions before commencing installation and leave
them with the user when installation is complete.
1. Important safety points
Important information is contained within this instruction manual, read and understand
the safety guidance and warnings before undertaking installation, operation or maintenance
of the appliance. Ensure they are left with the user upon completion of installation.
Electrical installation must be carried out by a qualified electrician in accordance
with the latest edition of the IEE wiring regulations.
The appliance must be earthed.
The product should only be connected to an electrical supply that meets the
specifications detailed on the rating label.
If the supply cord is damaged, it must be replaced by the manufacturer,
its service agent or similarly qualified persons in order to avoid hazard.
The 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.
The supplied safety relief device must be fitted in all circumstances, ensure there
are no obstructions in the plumbing between it and the appliance.
The safety relief device will operate if it encounters an over pressure event,
ensure it can discharge to a safe visible place, open to the atmosphere, that will
not cause harm to people or the surroundings.
Turn off the appliance immediately if the water supply is suspected to be frozen.
Consider reducing the risk by lagging pipework if exposed to cold environments.
3
The water stored in this appliance can be very hot when running on the higher
thermostat settings. Ensure precautions are taken to inform and safe guard likely
users, consider temperature limiting devices such as thermostatic mixing valves
where the risk of scalding injury cannot be easily managed.
2. Installation
When choosing the installation location for the appliance, consider the following:
•Ease of future access for cleaning and maintenance.
•Minimising risks to property should a leak occur.
•Minimising the distance to desired outlet(s) to reduce heat loses through pipework.
•Risk of pipework freezing during cold periods.
The appliance can be installed as free standing or wall mounted, the required bracket
and fittings for wall mounting are supplied.
The appliance can be installed above or below any outlet, but must be installed
upright, with the plumbing connections exiting the top of the heater. The heater
controls will malfunction in any other orientation and may pose a serious
scalding risk.
If the appliance is to be wall mounted, ensure the wall is suitable for both the
wall fixing types supplied, as well as being able to support the overall weight
of the product when full of water (see specification table).
all Mounting
Using the wall mounting bracket supplied and ensuring a horizontal level, mark the two
holes onto the mounting surface. Drill the two marked holes and then assemble the
bracket and fixings, as shown, before inserting them into the holes.
Using a 10mm spanner, tighten both
bolts until the bracket is firmly held
on the mounting surface.
Offer the unit up to the bracket and engage it into the corresponding slots on the back
of the unit. Ensure the bracket drives fully into the insulation of the heater and that it
sits flush to the surface upon completion.
Plumbing
Before commencing the installation of any unvented water heater, a number of
scenarios may require the additional purchase and installation of accessories in order
to avoid problems of over pressure/drinking water contamination.
Check the below diagrams to confirm if any additional kit is required.
DIAGRAM A - Pressure < 4.2 bar & pipework length > 1.4m (5 litre)
2.8m (10 litre)
4.2m (15 litre)
4
Hot Cold
T piece
Speedflow
Pressure
relief valve
To drain
Nearest cold
draw off
Service valve
Cold water mains
No kit needed.
DIAGRAM B - Pressure > 4.2 bar & pipework length > 1.4m (5 litre)
2.8m (10 litre)
4.2m (15 litre)
Hot Cold
T piece
Speedflow
Pressure
relief valve
To drain
Nearest cold
draw off
Service valve
Pressure
reducing
valve
Cold water mains
SF5 (pressure) kit needed.
Length of pipework
Length of pipework
5
DIAGRAM C - Pressure < 4.2 bar & pipework length < 1.4m (5 litre)
2.8m (10 litre)
4.2m (15 litre)
DIAGRAM D - Pressure > 4.2 bar & pipework length < 1.4m (5 litre)
2.8m (10 litre)
4.2m (15 litre)
Hot Cold
T piece
Speedflow
Pressure
relief valve
To drain
Nearest cold
draw off
Expansion
vessel
Check
valve Service valve
Cold water mains
SF3 (expansion) kit needed.
Hot Cold
T piece
Speedflow
Pressure
relief valve
To drain
Nearest cold
draw off
Service valve
Cold water mains
Length of pipework
SF4 needed (pressure & expansion) kit needed.
Expansion
vessel
Check
valve
Pressure
reducing
valve
Length of pipework
When planning the plumbing requirements for the heater, it is strongly advised a service
valve be fitted nearby to facilitate future maintenance.
The inlet (blue) and outlet (red) connections are not interchangeable, it is essential that
the incoming water supply is connected to the blue side and the red side is connected
to the outlet (tap).
Both the inlet and outlet connections should be made using ½” female connections.
For the best results, a fitting with a shallow thread depth is recommended. This will
facilitate a good flush fit against the heater connections that will seal reliably when
using a rubber washer of the right size.
Upon completion of all plumbing connections, open the outlet (tap) and then turn on
the water supply to allow the unit to purge air and fill. When water runs smoothly from
the outlet (tap), close it and then inspect all connections for leaks.
All installations require that the pressure relief valve (supplied) be fitted.
When fitting it, ensure that there is a clear pathway (i.e. no check valves or
non-return device) from the inlet of the heater right back to the device.
Ensure the pressure relief valve discharges to safe visible place and an air gap
is maintained.
Failure to ensure the correct installation of the pressure relief valve may result
in a dangerous build of pressure which can cause damage to the heater,
fittings and surroundings. If in doubt contact a suitably qualified tradesman
or alternatively speak to the technical team at Hyco about this, or any other
question regarding the heater and its installation.
6
Pressure
relief valve
T piece
To drain
Service valve
Cold water mains
Ensure the pressure relief valve
is tted and there are no ttings
between it and the heater.
M
Electrical connection
Always isolate the power supply before any electrical work.
Ensure the appliance is completely full of water before electrical power on.
Connection should be made to the fixed wiring of the property via a double pole
switched fused spur.
Electrical connections should be made as follows:
Green/Yellow earth wire to the terminal marked “E” or
Brown/Red live wire to the terminal marked “L”
Blue/Black neutral wire to the terminal marked “N”
3. Operation
Once the electrical supply is switched on, the heater will maintain the temperature
selected via the knob located at the front of the product.
The temperature can be adjusted by the user.
Settings are as follows:
“*“ setting 5°C
“E” setting 50°C
“MAX” setting 75°C
The neon light on the front of the heater will illuminate when the heating element is
working. When the light goes out this indicates the water has reached the thermostat
set point.
4. Maintenance
Always ensure the appliance is isolated from the power supply before any
maintenance or repair work.
Cleaning the heater
Use clean soapy water and non-abrasive cloths to clean the outside of the heater.
Sacrificial anode
A magnesium sacrificial anode is fitted to the heating element to protect the tank from
corrosion. This should be inspected at least annually, or more frequently in areas with
known aggressive water conditions, and replaced where necessary.
7
Recommended mounting height
(bottom edge of dryer above nished oor)
M 43”
L 41”
C 39”
C 33”
1
Pressure relief valve
The pressure relief valve should be checked annually by twisting the cap and verifying
water is discharged and the valve reseals.
Element
Limescale can build up over time and seriously hamper the performance and life of the
heating element. Check and descale the element annually, or more frequently if the
installation is in a particularly hard water area.
Accessing the unit
8
MAX
MAX
E
MAX
E
L
E
N
MT
BT
EH R
NE
1 2
3 4
5Thermal cut out
Element
Thermostat
5. Specifications
SF10SS/SF1012SS SF15SS/SF1512SS
Supply 230V AC 50Hz 230V AC 50Hz
Power 2.0/1.2kW 2.0/1.2k
Capacity 10L 15L
Rated pressure 8.0bar (0.8 MPa) 8.0bar (0.8MPa)
Pressure relief valve
6.0bar (0.6MPa) 6.0bar (0.6MPa)
ater resistance IPX4 IPX4
Thermal protection 85°C (manual reset) 85°C (manual reset)
Class I I
eight empty/full 7/17kg 8/23kg
Tank material Stainless Steel Stainless Steel
Product AB C D E
SF10SS/SF1012SS 330mm
330mm 291mm
21mm
100mm
SF15SS/SF1512SS 366mm 366mm
327mm
21mm
100mm
9
C
A
B
E
MAX
B
E
D
6. Troubleshooting
Sympton Solution
Appliance not heating Neon indicator light is not illuminated, check the thermal
cut-out and reset if necessary.
Neon indicator illuminated but not heating – check the
heating element and replace if necessary.
Water too hot Adjust the thermostat setting down (counter clockwise),
if it does not respond then change the thermostat.
Water too cold Adjust the thermostat setting up (clockwise), if it does
not respond then change the thermostat.
Pressure relief valve If the pressure relief valve discharges only during the
discharging heating cycle, this is a sign of a lack of pipework to
accommodate expansion. Check the incoming pipework
for non-return devices and remove if safe to do so
(see diagrams A-D).
If the pressure relief valve is discharging permanently,
this is likely to be a result of the incoming water pressure
exceeding 6 bar. A pressure reducing device should be
fitted to reduce the incoming water pressure.
10
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