Baxi Assure Vertical SHRU Manual de instrucciones
*2
United Kingdom
These instructions are to be left with the user.
The Assure Vertical SHRU should only be installed by a competent
plumber who has the expertise to be guided by this manual.
Please read the entire manual before commencing the installation process.
6685*$*57.(&0! #
267&00&7.32&.27*2&2(*&28&0
Waste Water Heat Recovery Unit
2 Vert SHRU
327*276
Section Page
1.0 Introduction 3
2.0 Technical Data 4
3.0 Installation Preparation 5
4.0 Installation 8
5.0 aintenance 10
6.0 Warranty 10
Vert SHRU 3
2753)8(7.32
1. The Assure Vertical SHRU (Shower Heat Recovery Unit) is a
waste water heat recovery system (WWHRS) that recovers heat
from the warm waste water when taking a shower. It relies on the
waste water from the shower flowing through a heat exchanger
that pre-warms the mains cold water feed to a shower mixing
valve and combination boiler or hot water storage cylinder
2. The Assure SHRU system consists of a stainless steel 316L
exchanger and is supplied with the necessary fittings for
installation. It has been developed for dwellings with the
bathroom on the first or higher floor, so that when taking a
shower the waste water flows under natural conditions through
the heat exchanger installed on the floor below the bathroom.
14357&27: The Assure SHRU has been tested and approved to
the UK water regulations and the installation must be carried out
in accordance with:
• UK Water Regulations/Water Byelaws (Scotland)/Water supply
regulations (Northern Ireland)
• All current Building Regulations
• Health & Safety at Work Act 1974, Approved Code of Practice
and Guidance L8 (not applicable to private homes, some landlord
owned properties)
3. Energy Saving Performance Recognised by SAP - The
successful operation of the Assure SHRU which is a Waste Water
Heat Recovery System (WWHRS) – Instantaneous Shower Heat
Recovery Device, depends entirely upon the adherence to these
instructions. Additionally, for dwellings within the UK, recognition
of the system’s energy saving performance within the National
Calculation ethodology (NC ) for the energy rating of
dwellings, known as the Standard Assessment Procedure (SAP)
requires that these instructions are complied with in conjunction
with a system design checklist and an installation checklist and
certificate of installation, supplied with this document and
available at: www.ncm-pcdb.org.uk/sap.
4. The system should be installed by a suitably qualified plumber,
with system design consideration being equally important to a
correct installation. For recognition of the Assure SHRU within
SAP, a system design checklist and an installation checklist and
certificate of installation should be completed and signed, with
copies kept for the home user pack (home owner), the installer,
and sent to Baxi at the post or e-mail address shown on the back
page. Building Control Officers may also request a copy. For the
purpose of system identification of product data without SAP, the
product will have an NC (SAP) Identifier label permanently fixed
to the unit, whereby the ‘model qualifier’ states ‘refer to
installation certificate, if unknown assume System B’. A second
NC (SAP) Identifier label is also supplied and must be affixed to
a nearby boiler or service cupboard (the label must be visible for
inspection without disassembly of nearby products or systems)
and the ‘model qualifier’ states ‘System A, System B or System C
delete as appropriate’.
37*:
i) The unit must be installed vertically and must self drain to the
trap downstream.
ii) Failure to install this unit correctly to system A, System B or
System C configuration diagrams will invalidate the guarantee
and may have an adverse effect on its efficiency.
iii) Not sending back the completed and signed system design
checklist, the installation checklist and certificate of installation to
Baxi will invalidate the guarantee.
iv) anufacturer’s instructions must NOT be taken in anyway as
over-riding statutory obligations.
Cold
pre-heated
mains
water OUT
Shower Waste WaterIN
Cleaning
access
u
Cold mains
water IN
Shower Waste
Water OUT
u
u
u
4 Vert SHRU
"*(-2.(&0&7&
Description Unit Value
mm 1650
mm 1800
mm 80
Material internal tube SS 316L
PVC
L/m
bar 10
Min. mains water pressure bar
ºC
1
60
Mains water connections inch 3/4” - 1/2”
mm 43
Weight kg 8
Water content – secondary Litres 0.9
*2*5&0&7&
31432*276.1*26.326(Fig. 1)
50mm
≥1960mm
1432mm
>150mm
1600mm
1
6
910
2
8
7
3
4
5
8
6
>110mm
5
Baxi Assure SHRU
Installation
SAP Label
1. Product Body
2. Tee Piece 45°
3. Cap - Cleaning Access Ø50
4. 45° Elbow Ø50 - 2 off
5. Adaptor - Ø50 to Ø43 - 2 off
6. Reducer - ale 3/4” to Female 1/2” (inc. cap) - 2 off
7. 90° Elbow - Female Ø50/Female Ø50
8. ounting Bracket - 2 off
9. Installation & aintenance anual
10. SAP Label
In addition it is strongly recommended to obtain two suitable
isolation valves to be installed on the mains inlet & pre-heated outlet
pipework. These will enable isolation of the unit from the mains
water circuit in the event of replacement.
Fig. 1
5
267&00&7.325*4&5&7.32
!<67*15.2(.40*
1. The Assure Shower Heat Recovery Unit (SHRU) is a waste water
heat recovery system (WWHRS) that recovers heat from the warm
waste water when taking a shower.
2. It relies on the waste water from the shower flowing through a
heat exchanger that pre-warms the mains cold water feed to a
shower mixing valve and instantaneous boiler or hot water
storage cylinder.
3. It is recommended that the pre-heated mains water from the unit
is connected to both the cold water supply of the shower mixing
valve and the combination boiler or hot water cylinder, as shown
(recommended System A configuration). System A configuration will
provide a balanced water flow and is the most efficient way to
recover the maximum amount of energy.
4. In case of an unbalanced water flow if, for example, only the cold
water supply to the shower mixer valve is pre-heated (System B
configuration) or the pre-heated mains water from the unit is only
connected to the combination boiler or hot water cylinder (System C
configuration), the efficiency of the SHRU will decrease by at
least 15%.
!<67*1(Fig. 2)
SHRU outlet connects to water heater inlet AND shower cold inlet.
!<67*1(Fig. 3)
SHRU outlet connects to shower cold inlet ONLY
!<67*1(Fig. 4)
SHRU outlet connects to water heater ONLY
5. Fig. 5 shows the SHRU serving two showers and being served by
the waste water from both. The example is a System A configuration.
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!<67*1
!<67*1
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Fig. 2
Fig. 3
Fig. 4
Fig. 5
ains Cold
Pre-heated ains
To Shower
6 Vert SHRU
3(&7.320*&5&2(*6
1. The Assure SHRU has been developed for dwellings with the
bathroom on the second or higher floor, so that when taking a shower
the wastewater flows under natural conditions through the heat
exchanger installed on the floor below the bathroom.
2. Therefore, the unit must be mounted vertically securely onto a flat wall
with the supplied.
It is recommended that the SHRU is installed in a location where all parts
of the unit are accessible and routine maintenance such as cleaning can
be carried out with reasonable ease.
3. Prevent the SHRU from being heated above 25°C by an external
source. Also, the SHRU must not be located where ambient
temperatures may be above 25°C.
4. The preheated water supply inline of the SHRU must be insulated in
accordance with the requirements of the ‘Building Services Compliance
Guide’.
37*: Do not insulate the SHRU itself.
It is required that the distance from the shower tray to the SHRU is kept
to within 3 metres to reduce any heat losses and ensure good efficiency
is maintained. inimum clearances of 80mm around the main body
should be maintained and adequate clearances must be maintained at
the top and bottom to ensure all components are accessible and can be
cleaned or replaced, if necessary.
267&00&7.32 *(311*2)&7.326
1. When showering with the SHRU installed, the cold water inlet
temperature will increase slowly because it will be warmed from the heat
transferred from the waste water, via the SHRU heat exchanger.
2. If a non-thermostatically controlled showerhead is fitted, continued
adjustment of the valve will be required to avoid hotter water
temperatures from the shower. Therefore, it is required that a
thermostatically controlled showerhead is always fitted.
3. Ensure full flow shut off valves are fitted at both connections of the
unit to allow for any replacement of parts.
4. The cold/preheated feed pipe work to the shower from the SHRU must
be plumbed up to the T connection at the thermostatic mixing valve of
the shower, and then from this T connection to the cold inlet of the
combination boiler or hot water store. This will ensure static water is not
held in the line for long periods without being flushed, providing other hot
water taps are being used.
5. After installation all domestic water pipe work should be flushed and
cleaned. This also applies if a system has been substantially altered.
However, this would be required even if a shower heat recovery unit had
not been fitted. (Refer Approved COP – L8 for guidance)
6. Pipework between the SHRU preheated water outlet and the water
heater and /or shower cold water inlet(s) (depending on installation
configuration) must be labelled to indicate that no other services can be
interconnected.
7. The hot water store or combination boiler must be set to provide and
distribute hot water at a temperature of at least 60°C.
Vert SHRU 7
Item Description Decision (tick
as appropriate)
1 Has consideration been given to DHW delivery performance (water
pressure and flow rate)?
2 Is the dwelling hot water system (DHW) a mains pressure system?
3 Does the water heater accept a preheated water inlet ( ax 30°C)
(N/A if installed in System B configuration)?
4 The length of drain pipe between shower and SHRU is less than
3 metres?
5 Is a trap/s-bend installed?
6 Is sufficient space for service and cleaning available?
7 Has a ‘System A, B or C’ configuration been selected?
8 Is the plumbing design configured in order to prevent connection of
hot water take-off points, such as taps, from the SHRU preheated
water outlet?
9 Is an installation location specified for the SHRU that does not
normally exceed 25°C?
10 Can the SHRU be installed within a tolerance of ±20mm of vertical?
11 If shut-off valves are specified for SHRU inlet and/or outlet, are they
‘full flow’ (non-restricting) shut-off valves? (Tick if N/A)
*6.,203:-&57-*(/0.67
1. With reference to the information in this section, take
into account the items in the checklist are required
before the Assure SHRU is installed to ensure it is
suitable for installation in the dwelling.
8 Vert SHRU
267&00&7.32
327*2763+&(/
1. The Assure Vertical SHRU is supplied in two packs,
one for the unit itself and the other containing various
fittings - see Section 2.2 Fig. 1 on page 4.
267&00.2,
1. Once a suitable position for the SHRU has been
established mark two points on the wall 1100mm
vertically apart (Fig. 6) for fixing clamp mounting holes.
2. If the wall is of masonry, brick or similar construction
drill & plug the two holes. It is not necessary to plug a
wooden structure (Fig. 7).
3. Fit the fixing clamps to the wall and mount the SHRU
body in them with the waste water discharge at the
bottom. Ensure the body is vertical in all planes (Fig. 8)
& tighten the clamps.
4. Take the 45° fork and determine the correct
orientation (Fig. 9), then using a suitable adhesive fix it
in place.
5. Fit the 45° waste water inlet connectors to the 45° fork
(Fig. 10) and connect one of the Ø50 to Ø43 adaptors.
Rotate them until they align with the shower waste water
pipework (Fig. 11).
1100mm
!!
!
GLUE
45 Tee Piece
2 x 45˚ Elbows
Adaptor - Ø50 to Ø43
Fig. 6 Fig. 7
Fig. 8
Fig. 9 Fig. 10
Fig. 11
Vert SHRU 9
u
u
90˚ Elbow
Adaptor - Ø50 to Ø43
267&00.2,(cont.)
6. Using the second the Ø50 to Ø43 adaptor c onnect the
waste water outlet to the waste system of the property
(Fig. 12).
7. Connect the pre-heated cold outlet (Fig. 13) & mains
cold water inlet (Fig. 14) pipework. It is strongly
recommended that this pipework incorporates suitable
isolation valves as shown.
Fig. 12
Fig. 13
Fig. 14
Vert SHRU10
387.2*264*(7.32&.27*2&2(*
1. To avoid a lower efficiency in the longer term, it is
recommended to clean the Assure Vertical SHRU. Over a period
of time it is likely that the Assure Vertical SHRU will start to gather
residue, to avoid this it is advised that it is flushed with a
household drain cleaner. Periodically, it is recommended to check
the installation for leaks etc.
%&55&27<
1. The Assure Vertical SHRU warranty is valid for 2 years after
installation date.
2. During the warranty period if the product has a defect in
design, material or workmanship it must be returned to the place
of purchase.
3. The warranty will be invalidated if product failures are caused
by the following:-
• Installed with cold inlet pressure above 10 bar.
• Use of the system without a waste trap.
• Inadequate cleaning of the waste trap.
• Installation of the Assure Vertical SHRU not in
accordance with these instructions.
• Unauthorized repairs and modifications.
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