Hotflo Unvented point of use hot water

Hotflo
Unvented point of use hot water
Hotflo
We developed the Hotflo range for people
who need a hot water supply for two to
three basins or sinks.
Flexible siting is a key design feature that we insisted upon because it means there is no
requirement for a cold water cistern. Hotflo can be used with standard or mixer taps and
fed from the mains water supply provides high hot water flow rates.
• Available in 10 litre (suitable for up to two basins) and
15 litre (suitable for up to three basins) capacities.*
With the best possible performance, long-term reliability and corrosion-resistance in mind,
our designers specify high-grade copper for the Hotflo’s inner container. Using copper for
this key component also means we don’t have to fit a sacrificial anode – avoiding the need
for the hassle and expense of regular inspections and replacement. In addition, copper is
better than lower grade materials at withstanding shock and vibration during delivery,
installation and maintenance.
• Replaceable copper inner container with integral
heating element.
The complete confidence we have in the quality of Hotflo’s design and materials is proven
by its two year guarantee with on-site service support.
• 2.2kW element rating.
• Two year guarantee with on-site service support.
• Externally adjustable thermostat from 10°C to 70°C.
• CFC/HCFC free (ODP zero) flame-retardant expanded polystyrene.
• Element ‘On’ indicator.
• No anode to inspect or replace.
• Suitable for use with any standard tap or mixer.
• Fitted with 1 metre of 3-core cable.
• Comprehensive installation instructions.
• Pressure relief valve supplied with all models.
• IPX4 rated.
• BEAB and kiwa approved to UK Water Supply Regulations. CE marked.
* Figures are for guidance only, the Heatrae Sadia Specification Advice Team should be contacted to discuss
requirements for specific sites. Capacity recommendations are based on BS 6700.
2
3
Accessory selection guide
A key factor in the selection of accessories is the maximum
incoming water pressure at a particular location. In instances where
this is not known, installers are recommended to consult the local
water authority for more precise information. When fitting small
unvented water heaters it is important that, where necessary, the
correct accessory packs are fitted to suit local conditions. For
assistance in their selection and fitting, consult the following guide.
To provide an added level of safety, Heatrae Sadia recommend
the fitting of a temperature and pressure relief valve on heaters of
15 litres and below, although this is not required under the latest
British Standards.
Accessories
Diagram 1
When installing small unvented water heaters, it is essential that the correct
accessory packs are used. The selection guides on page 4 indicates the
appropriate pack(s) for different heaters and situations.
Nearest cold
draw-off
Pressure
relief
valve
Service
valve
Cold
Hot
T piece
Hotflo
10 litre
or 15 litre
heater
A full range of accessories are available for installation with Hotflo 10 and 15.
These are supplied as accessory packs.
For inlet water pressure up to 4.1 bar (60psi).
Cold mains feed
To drain
(waste)
Thermostatic blending valves allow water to be stored at high temperatures
and blended with cold water to a preset outlet temperature.
This provides over-temperature protection, and is ideal for the control of
Legionellae and the extension of system capacities.
If the expansion in the cold main is restricted, for example by a stop valve,
check valve or water meter, an accessory pack which includes an expansion
vessel must be fitted. See diagrams 2 and 3 on page 4.
Pack U3 – TMV2
Connection 15mm compression.
A knowledge of the maximum incoming water pressure is an essential
requirement prior to installation; where this is not known the local Water
Authority should be consulted.
2.8 (10 l) or 4.2 (15 l) metres
is required for expansion
in pipework
Allows water to be safely stored above 60°C.
Precisely controls outlet water temperature
(range from 35°C to 60°C).
Lockable control knob.
Fail-safe shutdown.
Can expanded water be accommodated in the pipework
without hot water entering any supply pipe to which a
cold water draw-off is connected?
(i.e. at least 2.8m of 15mm pipe for 10 litre unit
and 4.2m for 15 litre unit)
YES
NO
Diagram 2
Hot
For inlet water pressure up to 4.1 bar (60psi)
where expansion down the mains is not possible.
Hotflo
10 litre
or 15 litre
heater
Incorporates check valves to prevent cross
contamination.
The pressure reducing valve limits water
pressure to 3.5 bar (50 psi).
Operating pressure from 0.2 bar to 6.0 bar.
The strainer filters coarse impurities from the
water supply.
Pressure
Expansion Nearest cold
relief
draw-off
(expansion) vessel
valve
Check
valve
Cold
T piece
Are there any check valves,
stop valves with loose
jumpers or fittings that
prevent reverse flow?
Pack U1 – Combined pressure reducing
valve and strainer
Connection 1/2" BSP female.
Service
valve
Cold mains feed
To drain
(waste)
Installation Pack U1 must be installed on the
cold inlet side of the heater and before the
expansion vessel. Where possible, installation
should be on the mains side of the cold water
tap draw-off. This will result in balanced water
supplies and is particularly important when
mixers are to be used.
Pack U7 – TMV3
Connection 15mm compression.
Fully approved under the TMV3 scheme to the
DO8 specification.
Pack U1 must be used with Pack U5.
Allows water to be safely stored above 60°C.
NO
Precisely controls outlet water temperature
(range from 38°C to 46°C).
YES
Diagram 3
Is mains pressure
4.1 bar or less?
YES
Is mains pressure
4.1 bar or less?
NO
YES
NO
Hot
Pressure
Expansion Nearest cold Pressure
relief
reducing
draw-off
(expansion) vessel
valve
valve
Check
valve
Cold
T piece
Is temperature
and pressure
relief valve
specified?
Is temperature
and pressure
relief valve
specified?
Is temperature
and pressure
relief valve
specified?
Is temperature
and pressure
relief valve
specified?
YES
YES
YES
YES
NO
NO
NO
Hotflo
10 litre
or 15 litre
heater
Pack U5 – Expansion vessel and check valve
For inlet water pressure over 4.1 bar (60psi).
Service
valve
Cold mains feed
To drain
(waste)
Unique adjuster key to prevent unauthorised
temperature adjustment.
The expansion vessel when fully charged, will
absorb all expanded water produced by the
Hotflo heater during normal operation.
Fail-safe shutdown.
Incorporates check valves to prevent cross
contamination.
Connection 1/2" BSP male; precharged 4.1 bar.
The check valve prevents backflow of hot water
and eliminates any possibility of crosscontamination between cold and hot water.
Operating pressure from 0.2 bar to 5.0 bar.
Connections 15mm compression.
Note:
If pressure reducing valve
is used, expansion down
the mains is not possible.
Installation Pack U5 must be fitted on the inlet
side and in close proximity to the heater as
shown in diagrams 2 and 3 on page 4.
Installation diagram and advice
Heatrae Sadia offers a dedicated specifier advice line to provide information
and advice on specification and installation. This is supported by a fully-trained
national sales team, all of whom are qualified to provide further guidance
and support locally.
NO
Diagram 4
No packs
required
Fit packs
U1 + U5
Fit pack
U5
Fit packs
U1 + U5
Diagram 1
Diagram 3
Diagram 2
Diagram 3
Temperature and pressure relief valve.
For use with diagrams 1-3 above.
Temperature and pressure
relief valve
Hot
Cold
To drain (waste)
Fit pack
U6
Fit packs
U1, U5 + U6
Fit packs
U5 + U6
Fit packs
U1, U5 + U6
Diagram 4
Diagrams
3+4
Diagrams
2+4
Diagrams
3+4
Hotflo
10 litre
or 15 litre
heater
Outlet taps
Pack U6 – Temperature and pressure
relief valve
The temperature and pressure relief valve is
recommended by Heatrae Sadia to give an
additional level of safety to Hotflo. It is pre-set to
open at 7 bar (101.5 psi) and 90°C. Pack U6 is
the only temperature and pressure relief valve
recommended for use with Hotflo unvented
heaters.
Hot outlet
Blended water
to outlets
Balanced
cold water
supply
Cold mains feed
Pack U3 or U7
blending valve
Water
heater
Connections Inlet and outlet 15mm compression
drain 1/2" BSP female.
Installation Pack U6 valve is connected to the
outlet connection on top of the Hotflo heater.
See diagram 4 on page 4.
4
5
Full specifications
Dimensions and ordering
Specification
Installation
Guarantee
Capacities
10 and 15 litres.
Mechanical
Must be mounted in the vertical position with inlet /
outlet at the top. Floor or wall-mounted (three screws
/ keyhole slots).
Hotflo carries a full two year transferable on-site
service support guarantee against faulty manufacture
or materials provided that:
Rating
2.2kW @ 240V, (2kW @ 230V).
Outer casing
White plastic top moulding with steel base and centre
section, finished in white stove enamel.
Thermal insulation
CFC/HCFC free (ODP zero) flame-retardant expanded
polystyrene.
Water container/integral heat unit
Replaceable heavy gauge copper inner container,
designed for 6 bar working pressure and type tested
to 20 bar (290 psi), with embedded rod-type element
sheathed in corrosion resistant alloy.
Thermostat
Rod-type externally adjustable from 10°C to 70°C.
Safety features
Pressure relief valve set to open at 6 bar.
Resettable over temperature cut-out.
Anode
Not required.
IPX4 rated
Approvals
BEAB and kiwa approved to UK water supply
regulations. CE marked. Manufactured in the UK in a
BS EN ISO 9001:2000 registered factory.
Plumbing
15mm copper tail ends. Minimum water pressure 0.8
bar (12 psi). For pressures above 4.1 bar (60 psi), packs
U1 and U5 must be used.
NOTE: The pressure relief valve supplied must always
be fitted. See accessory selection guide on page 4.
Temperature and pressure relief valve
Optional Pack U6 – see accessory selection guide on
page 4.
Safety valve discharge
The pressure relief (expansion) valve or temperature
& pressure relief valve (if used) must be plumbed to
discharge in a safe visible location.
Optional thermostatic blending valve
Accessory Pack U3 and Pack U7 (see page 5) allows
water to be stored at high temperature and blended
with cold to a preset outlet temperature.
Electrical
The unit must be permanently connected to the
electrical supply through a double-pole linked switch
with minimum breaking capacity of 13 amps.
Must conform to current IEE wiring regulations.
•
171
It has been installed in the UK.
•
It has not been modified in any way, other than by
Heatrae Sadia Heating.
Rating
@ 240V
Product
code
59
It has been correctly installed as per the
instructions contained in the instruction manual
and all relevant Codes of Practice and Regulations
in force at the time of installation.
•
Model
B
(kW)
Fixing centres
of wall screws
(unit hangs on
keyhole slots)
D
190
E
•
The damage is not due to scaling or frost.
•
It has only been used for the storage of potable
water.
•
It has not been tampered with or been subjected
to misuse or neglect.
FRONT
•
Within 60 days of installation the user completes
and returns the certificate supplied along with the
proof of purchase to register the product.
C
Hotflo 10
2.2
95:050:148
Hotflo 15
2.2
95:050:149
10 litre
2.2
95:608:916
15 litre
2.2
95:608:917
Replacement inner container with integral element
A
Accessories ordering guide
SIDE
Model
62.5
50
Evidence of purchase and date of supply must be
submitted. The unit is not guaranteed against
damage due to frost. The guarantee is transferable.
This guarantee does not affect your statutory rights.
Product
code
Accessory pack U1 See page 5 for details
95:970:352
Accessory pack U3 See page 5 for details
95:970:354
Accessory pack U5 See page 5 for details
95:970:356
Accessory pack U6 See page 5 for details
95:970:359
Accessory pack U7 See page 5 for details
95:970:360
TOP
Model
6
Ordering guide
Dimensions
Capacity Rating
@240
A
B
C
D
E
Weight
empty full
(kg) (kg)
(litre)
(kW)
Hotflo 10
10
2.2
500
252
267
457
360
6.5
16.5
Hotflo 15
15
2.2
656
252
267
613
516
8.4
23.4
(mm) (mm) (mm) (mm) (mm)
7
Contact
Specification
T: 01603 420220 F: 01603 420229
E: specifier@heatraesadia.com
After Sales Service
T: 0844 871 1535 F: 0844 871 1528
E: heatraesadiaservice@heateam.co.uk
Web www.heatraesadia.com
Brochures for all of our products are available
free of charge. Please call our literature hotline
on 01603 420127.
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National service network
Heatrae Sadia products are inherently reliable
and are designed to meet the demanding needs
of all users.
A nationwide network of experienced engineers
is available to provide fast and efficient on-site
service support.
In addition, spare parts for the complete range
of products are readily available through a wide
variety of stockists.
Commercial Hot Water
•
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•
B3M / C3M
FBM
Handy Dri and Hair Drier
Immersion Heaters
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Drinking Water
• SuperChill
Heatrae Sadia Heating Hurricane Way Norwich Norfolk NR6 6EA
Heatrae Sadia Heating may introduce modifications to their products
from time to time. Consequently, the details given in this brochure
are subject to alteration without notice.
95 900 907 Issue 1 © Heatrae Sadia Heating. 2009.
This product is printed on 50% post consumer recycled
paper. That is paper that has been previously used eg.
newspapers and magazines. This product is printed
using vegetable based inks which are non toxic. Please
recycle this product once you have finished with it.
• Supreme
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