Envirovent heatSava User manual

September 2014
Please read these
instructions

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Contents
Page
01 Introduction 1
02 Technical Specications 2-3
03 Wiring Diagrams 4-5
04 Safety 6-7
05 Box Contents 8-9
06 Tools Checklist 10
06A Pre-Installation Checklist 11
07 Controls 11
08 Pre-Installation 12-13
09 Installation 14-26
Installation with wall seal 17-18
Installation with wall sleeve 19
10 Cleaning & Maintenance 27-29
11 Guarantee 30
12 Warranty 30
01
Gold Standard After Sales Service
In the unlikely event of any on-site installation problems or queries regarding the EnviroVent heatSava, just call our hotline
number. We will take your details and appoint a regional installation manager to call you back to discuss the problem. In the
majority of cases, the problem can be resolved over the phone. However, in cases where the problem cannot be resolved
over the phone, we will arrange a visit from our Gold Standard Engineer. They will meet with your contractor/direct labour
on-site to discuss and resolve the problem, will provide training and also give advice on the installation of the unit.
INSTALLER HOTLINE: [phone]
01 Introduction
Thank you for choosing EnviroVent
The fastest growing ventilation company in the UK
Ensure that this product is treated with care, installed and maintained correctly i.e. for
the life of the building. Remember, if you have any problems please call our dedicated
Technical Team.

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02
02 Technical Specications
Unit Dimensions
Cowl End
Heat Cell
Fan Adaptor
Assembly
(Supply Fan)
Centre Assembly
(Electronics)
Front Cover
Rear Assembly
(Extract Fan)

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02 Technical Specications
Heat Cells Options
Ø100
Ø150
03
Wall Depth mm
(A)
Cell Order Size mm
(B)
100 - 330 330
331 - 430 430
431 - 500 500
501 - 600 600

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04
03 Wiring Diagrams
Mains - This unit must be earthed
Connect 2 core & earth
cable into existing wiring

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05
03 Wiring Diagrams
SELV - This unit must be earthed
Connect 2
core cable
from SELV
box into unit
Connect 2
core & earth
cable to
existing wiring
2 core & earth2 core
SELV
2 core 2 core
& earth
SELV Box must be
secured using the 4
xing points
Cables must be
restrained inside
SELV box
SELV Box
Power Supply
GND
V+
GND V+

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06
04 Safety
• Never modify the fan or electronics.
• Do not store inammable products in the
vicinity of this product.
• 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.
• For a bathroom application the power
supply should be installed outside the
bathroom as it is 230V.
Be sure to have read and understood these
instructions before beginning the installation
process.
IPX4 Rated
This unit has been tested to IPX4 and is
suitable for installation within Zone 1 of
bathrooms. However, we recommend
that you must not position the unit
above any water devices such as taps,
shower heads or jets and ensure water
is not aimed directly at the unit. Do not
use jets or shower heads etc to clean
this unit.
All wiring must comply with Building
Regulations and the current I.E.E. Wiring
Regulations (BS7671) or the equivalent
standards for your country. The nal
installation should be examined and
tested by a qualied electrician.
Make sure the mains supply complies
with the rating label for voltage,
frequency and phase.
IMPORTANT: This unit draws air in
from atmosphere and you must ensure
that any emissions from any other
systems such as gas or oil boilers, do
not contaminate the air entering the
heatSava product. Therefore, before
installation, consider where the external
cowl will be located in relation to any
boiler ues etc. Externally, you must
ensure that the unit is positioned a
minimum distance away of; 1 metre
horizontally, 1 metre below or 3 metres
above any boiler ue etc.
In kitchens, if the unit has to be tted
above a cooker, it must be installed a
minimum distance of 650mm above
electric cookers and 750mm above gas
cookers, and not have a pullcord tted.

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07
04 Safety
Electrical Assembly
When wiring the unit in, a suitable
disconnect device such as a fused spur
should be used, do not use a plug. The
means of disconnecting the unit from the
mains power supply must be incorporated
in the xed wiring in accordance with the
wiring rules.
There must be a necessity to allow
disconnection of the appliance from the
supply after installation, unless the appliance
incorporates a switch complying with the
wiring regulations The disconnection may
be achieved by incorporating a switch in the
xed wiring in accordance with the wiring
regulations.
The electrical install comprises of a power
supply unit (Fig.1) or a low voltage box
- SELV (Fig.2). See pages 4-5 for wiring
diagrams.
If the supply cord is damaged, it must be
replaced by the manufacturer, its service
agent or similarly qualied persons in
order to avoid a hazard.
SELV Box
MAINS
Fig.1
Fig.2
Fan
Board
Power
Supply
Connect 2 core
& earth cable into
existing wiring
Connect 2
core cable
from SELV
box into unit
Connect
2 core
& earth
cable to
existing
wiring
2 core
& earth2 core
SELV
Cables must be
restrained inside
SELV box.

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05 Box Contents
1 heatSava Unit
2 Heat Cell
3 Instructions Guide
4 SELV (optional)
5 Halo
6 Wall Seal
7 Fixing Template
8 Fixing Kit
08

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09
05 Box Contents
Description Quantity Item
heatSava Unit 1x
Heat Cell 1x
Instructions Guide 1x
SELV (optional) 1x
Halo
(Wall Kit Contents) 1x
Wall Seal 1x
Fixing Template 1x
Fixing Kit 1x
8G X 2.0” -
(Fixing Kit Contents) 6x
Red Wall Plugs -
(Fixing Kit Contents) 6x
Terminal Block
(Spare) 1x

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06 Tools Checklist (Not supplied)
Description Item
Core Drill
Electric Screwdriver
Long & Short Screwdriver
Small Terminal Screwdriver
Spirit Level
Cutting Pliers
Long Nose Pliers
Ladder
Solvent Cement
Silicone
10

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11
06A Pre-Installation Checklist
Boiler flue exclusion zone
heatSava installation instructions have been read and understood
Check unit size is suited to wall depth
Use the template to position and orientate the unit
Drill the core hole and 3 xing holes as straight as possible
Follow the instructions for installing the unit
Ensure the unit’s trickle and boost modes are working
Ensure all electrics are safe
The halo is properly xed to the exterior wall
The unit is securely fixed into position with enough space left for servicing
Inform building owner/user on how to operate and maintain the system
These checks are required to ensure the proper function of this unit.
For EnviroVent Technical help call 0845 27 27 810
07 Controls
Intelligent Humidity Tracking (Automatic)
The heatSava has been engineered with intelligent controls
to think for itself, meaning that you don’t need to press any
buttons or light switches to turn it on.
When the heatSava senses a rise in humidity, caused by
increased moisture generation such as through cooking or
showering, the extract and supply airows will slowly begin to
increase in direct proportion to the increase in humidity.
It will then automatically track back down again when humidity
falls. This controls condensation quietly and eciently.
Pullcord (Manual)
The heatSava comes complete with a pull cord to activate the
boost if required. Pull once to activate the boost and once to
deactivate.
Summer Mode (Automatic)
During warmer days, the heatSava prevents warm air from
entering the room and switches to provide extract ventilation
only. As the temperature falls it automatically returns to heat
recovery mode.
Frost Protection (Automatic)
The heatSava has an automatic built-in frost protection
mechanism to prevent any damage to the heat exchange cell
in cold conditions.

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Introduction
Designed for through the wall installation, the heatSava is ideal
for both refurbishment and new build properties. The outside
diameter of the heat exchange casing is smaller than a standard
wall sleeve and can therefore utilize an existing one already in
place. The heatSava also takes into account the complexities
of dierent wall depths to oer 4 dierent main lengths that the
heat exchange casing is manufactured to (see page 3). The unit
is installed from the inside out to allow for ease of installation in
high-rise applications.
Built with intelligent humidity tracking controls means no
user intervention is required and heatSava silent-night mode
prevents noisy running at night. The heatSava is exceptionally
versatile and can be installed horizontally or vertically in 4
dierent positions through 360° (Fig.3).
Pre-Installation Checklist
Before starting the installation process, ensure that you have all
the necessary equipment and the following:
• Check wall depth
• heatSava Unit
• Heat Cell
• Fixing Kit
• Wall Seal Kit
• Low Voltage Box (optional)
• Choose position and orientation
Heat Cell Orientation
When tting the heat cell into a wall, ensure that the cowl end is
correctly orientated with the end always facing down. (Fig 4.)
Clearance
The heatSava has been designed to allow easy installation into
an existing wall sleeve which is located near the ceiling. When
core drilling into an existing wall, make sure you have enough
space to move around and distance between the wall and any
objects nearby i.e cupboards (Fig.5).
Ensure the unit is sited in a suitable position for adequate
clearance on all sides for easy access to the unit for maintenance
purposes and to ensure that access to the release clips on the
front cover is not inhibited.
08 Pre-Installation
Fig.4
Fig.3
3
12
6
9Cell
Cell
Fig.5 Plan layout
heatSava
cupboard
LEAVE ADEQUATE CLEARANCE
12

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08 Pre-Installation
Clearance
First measure the wall depth. If installing into
a new build application, we recommend
that the unit should be installed in the
position below (option 1). If installing into an
existing wall sleeve which is located near to
the ceiling, the heatSava can be installed
horizontally or vertically (options 2-4).
Ceiling 30mm
min
30mm
min
Ceiling
Option 1
Option 3 Option 4
Option 2
20mm
min
20mm
min
Cover
release
clips
13
The rst step in the installation process is
to check the wall depth on the property
to determine what type of install is
required. Please read clearance section
carefully before determining the position
and cell size suitable for the unit.

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• For quick and easy installation use 3 x holes marked ‘B’.
• If the xing surface is of poor quality and holes ‘B’ cannot be used,
then use holes ‘A’.
• To access holes ‘A’ the unit needs to be disassembled (see page 23).
OPTION B - For OPTION A, go to page 23.
heatSava 100 or 150?
107mm, 117mm, 158mm, 162mm?
See pages 17-19 for seal or sleeve installation
09 Installation
Cell
1
3
2
?
4
14
X3
Check orientationRead instructions

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09 Installation
15
X4

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09 Installation
16
Solvent Cement
(not supplied)

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09 Installation
17
=X
=X
117mm or
162mm Ø
Rubber Wall Seal - Choose rubber wall seal or wall sleeve installation.

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09 Installation
18
Solvent
Cement
117mm or
162mm Ø

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09 Installation
19
Wall Sleeve
Use existing sleeve or insert new sleeve into wall.
Apply cement around sleeve and insert through wall.
Wall sleeve
not supplied
Wall sleeve
Cement
=X
=X
C
BA
A99mm (100) or 149mm (150) Ø overall
B100mm or 150mm Ø internal (min)
C107mm or 158mm Ø
XX