Vent-Axia HR100W User guide

HR100W, HR100WH & HR30
W
Through The Wall Heat Recovery Ventilators
Installation and
Servicing Instructions
Please leave these instructions with the user

Warnings & Safety Information

IMPORTANT SAFETY
INFORMATION
PLEASE READ THESE
INSTRUCTIONS
CAREFULLY BEFORE
COMMENCING
INSTALLATION.
1. Do not install this product in areas
where the following may be present or
occur:
• Excessive oil or a grease laden
atmosphere.
• Corrosive or flammable gases,
liquids or vapours.
• Subject to direct water spray from
hoses.
• Ambient temperatures higher than
40°C and lower than -20°C.
• Possible obstructions that may
hinder access to or removal of the
unit.
2. All wiring must be in accordance
with the current IEE wiring regulations
BS7671, or appropriate standards of
your country. Installation should be
inspected and tested by a suitably
qualified person after completion.
3. Ensure the mains supply (voltage,
frequency and phase) complies with
the rating label.
4. The unit should be provided with a
local double pole fused spur fitted
with a 3A fuse having a contact
separation of at least 3mm.
5. These units must be earthed.
6. Precautions must be taken to avoid
the back-flow of gases into the
building from the open flue of gas or
other fuel-burning appliances.
7. This appliance is not intended for
use by persons (including children)
with reduced physical, sensory or
mental capabilities, or lack of
experience and knowledge, unless
they have been given supervision or
instruction concerning use of the
appliance by a person responsible for
their safety.
8. Young children should be
supervised to ensure that they do not
play with the appliance.
9. CAUTION: In order to avoid a
hazard due to inadvertent resetting of
the thermal cut-out, this appliance
must not be supplied through an
external switching device, such as a
timer, or connected to a circuit that is
regularly switched on and off by the
utility.
Disposal
This product should not be disposed of
with household waste. Please recycle
where facilities exist. Check with your
local authority for recycling advice.

INSTALLATION GUIDANCE
1. The installer is responsible for the installation and
electrical connection of the system on site. It
is the responsibility of the installer to ensure that the
equipment is safely and securely installed and left
only when mechanically and electrically safe.
2. All regulations and requirements must be strictly
followed to prevent hazards to life and property, both
during and after installation, and during any
subsequent servicing and maintenance.
3. Certain applications may require the installation of
sound attenuation to achieve the sound levels
required.
4. The unit must not be connected directly to a
tumble drier.
5. The supply air must be drawn from the exterior of
the property.
6. The exhaust grille should be located at least
600mm away from any flue outlet. The inlet grille
should be located 2000mm away from any flue
outlet.

3
1.0Introduction 4
2.0Site Requirements 5
3.0Installation 6
4.0Electrical 8
5.0Maintenance 9
6.0Additional Information 1
7.0Fixing Template 1
Section Page
Contents
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1.0 Introduction
4
1.1 Description
1. The HR100W, HR100WH and HR30Wunits are
"through the wall” heat recovery ventilators, for use
in areas such as kitchens, bathrooms and single
occupancy bedrooms.
2. The units are fitted with twin impeller and
heat exchanger arrangements which
simultaneously supply and extract air while
transferring heat from the stale exhaust airflow
to the fresh intake airflow. This provides up to
70% heat recovery from the stale extracted air.
A boost speed facility is available for periods
when higher air change rates are required.
3. Installation and maintenance for all three
units is the same, therefore the majority of this
booklet is based on the standard HR100Wunit
(Fig. 1). For additional information on the other
units, please refer to Additional Information
(Section 6.0).
Fig. 1

2.1 Information
1. The unit is designed for installation in
external walls with a thickness of up to 280mm
(Fig. 3). For wall thicknesses above 280mm, an
extension kit (Ref. EXT100) must be used.
2. The unit must be sited and connected by a
suitably qualified person and be in accordance
with current U.K. Building Regulations and
I.E.E. Wiring Regulations (BS 7671).
3. The unit is intended for permanent
connection to the mains electrical supply.
4. The unit is intended for fixed wiring
installation.
5. Ensure that the mains electrical supply is
compatible with the product’s rating label.
6. The unit must be sited away from direct
sources of heat in excess of 40°C.
7. Do not site the appliance in the vicinity of
excessive levels of airborne oil or grease.
8. If the unit is installed in a room containing a
fuel burning appliance, the installer must ensure
that air replacement is adequate for both
appliances.
9. The internal grille surround must be sited a
minimum of 125mm away from any wall or
projecting surface (Fig. 2).
10. The external cowl of the unit must be sited a
minimum of 500mm away from the flue of gas
or open fire appliances. This is to avoid back
flow of gases entering the room.
11. All safety regulations and requirements
must be strictly followed to prevent hazards to
life and property both during and after
installation and during subsequent maintenance
or servicing.
12. Ensure the mains electrical supply is
isolated before commencing installation, or
maintenance.
2.0 Site Requirements
5
Fig. 2
270mm
Fig. 3
195mm
500mm
Min
125mm
Min
125mm
Min
220mm - 280mm
adjustable
370mm
22

3.0 Installation
6
3.1 Controllers
The HR100Wunit can be installed in conjunction
with a number of controllers.
VCON100
The VCON100 is a dedicated controller,
suitable for ON/OFF and two speed control of
the HR100Wunit only.
PCSW
The PCSW is a pullcord switch, suitable for
manual switching between HIGH and LOW
speeds of the HR100Wand HR100WH units.
NBSW
The NBSW is a manual switch for switching
between HIGH and LOW speeds of the HR100W
and HR100WH units.
HS6
The HS6 is a humidity sensor for switching
between HIGH and LOW speeds during the
daytime according to relative humidity levels.
TIM2
The TIM2 is an overrun timer which can also be
used to control the HR100Wunit via a light switch
or remote sensor e.g. PIR detector.
3.2 Initial Preparation
1. Select an approved electrical control
arrangement for the HR100Wunit (above).
2. After considering the site requirements
(page 5), select a suitable site for the unit and
controllers and work out the cable runs.
WARNING: Before deciding on the final
position for the unit, check there are no
buried cables, pipes or obstructions on
the outside wall.
Cable requirements:
Three core for single speed operation.
Four core for two speed operation.
See page 8 for wiring options.
3. Install the cable runs and appropriate
controllers in conjunction with a fused
connection unit. Contact gap must not be less
than 3mm.
4. Working from the inside, mark out the
position of the mounting hole - 240mm wide x
160mm high (see Fixing Template - page 11).
5. Carefully cut the holes in the inner and outer
brick courses to form a suitable aperture to
receive the unit. Ensure that this is level, or
angled down slightly to outside (Fig. 4).
NOTE: Bricks will cut more easily and
accurately if a series of holes are drilled
close together along the marked lines.
6. Remove the grille, heat exchanger, outer
collar and cowl from the unit (Fig. 5).
Fig. 4
Fig. 5
1° angle for
drainage
Cable Entry Gland
Inside Outside
Cowl
Collar
Heat Exchanger
Grille

3.0 Installation
7
3.3 Installing the Appliance
From inside
1. Slide the unit into the mounting hole and
ensure that the rear of the mounting flange can
be set flush with the internal wall finish
(Figs. 6 & 7).
NOTE: The HR100Wunits have a maximum
overhang on the outside of 60mm. If the
overhang exceeds 60mm, the unit must be
pushed inwards until the maximum overhang
is achieved.
2. Feed the power supply cable through the
gland (Fig. 6).
3. Ensure that the unit is square and true with
the outside wall face. If firmer fixings are
required, secure the unit in place with the two
fixing screws provided (Fig. 7).
4. Make good around the case.
From outside
1. With the cowl removed, slide the collar
(flange first) on to the unit and press the flange
firm against the outer wall (Figs. 8 & 9).
2. Mark and trim the small end of the collar
flush with the metal casing of the unit (Fig. 9).
3. Make good between the face of the flange
and the wall using an appropriate waterproof
mastic seal.
4. If firmer fixings are required, secure the
flange to the wall using plugs and screws
(Fig. 8).
5. Fit the cowl in place and secure using the
two screws provided (Fig. 9).
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Cable Entry Gland
Fixing Screws
Mounting Flange
Power Supply Cable
Flange
Collar
Collar Fixing
Screws (optional)
Cowl
Securing
Screws

4.0 Electrical
8
4.1 Electrical Connections
230V 50Hz 12W (normal) 31W (boost)
1. The HR100Wis supplied with an in-built two
speed motor fitted.
2. Wiring must be via a 3A fused switched spur
with a 3mm contact separation in each pole.
The wiring should be suitably (Basec or Har)
approved cable of appropriate current carrying
capacity.
3. Ensure that the mains power supply is
isolated prior to installation.
4. Remove the terminal block cover (Fig. 10)
and connect incoming wires to the appropriate
terminals, see relevant wiring diagram
(for HR100WH see page 11).
5. Replace the terminal block cover and
tighten the cable gland (Fig. 10).
6. Slide the heat exchanger into the unit,
ensuring the ‘Top’ label is facing the front and
pointing upwards (Fig. 11).
7. Locate the grille on to the front of the unit
and secure with the two screws provided
(Fig. 11).
8. Switch on the mains electrical supply and
check the operation of the unit.
Fig. 10
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Fig. 11
Terminal Block
Cover
Heat Exchanger
Securing Screws
Grille
HR100WTerminals
3 amp fused supply
L
L
NNeutral
Live
Earth
1
2
HR100WTerminals
3 amp fused supply
NBSW/PCSW
L
L
NNeutral
Live
Earth
1
2
HR100W/HR100WH
Terminals
3 amp fused
supply
L
L
NNeutral
Live
Switched Live
Light
Earth
1
2
1
2
3
L
N
HR100WTerminals VCON100 Terminals
3 amp fused supply
L
L
N
Neutral
Live
Earth
1
2
HR100WTerminals 3 amp fused supply
L
L
NNeutral
Live
Earth
1
2
HR100W, HR30Wand HR100WH units must not be wired in
conjunction with a light switch, units will fail.
HR100Wcontinuous normal speed.
HR100Wwiring to NBSW/PCSW switches for
manual, normal and boost switching.
HR100Wwiring to VCON100 controller for manual,
on/off, normal and boost switching.
HR100Wcontinuous boost speed.
Cable Entry Gland

5.0 Maintenance
9
5.1 Cleaning the Unit
1. In addition to removing odours, providing
fresh air and recovering heat, this unit extracts
airborne impurities such as dust, dirt and
grease. These gradually build up and detract
from the efficiency and appearance of the unit.
2. To ensure optimum performance, the unit
should be cleaned every three to six months or
at periods determined by the level of
contamination experienced, and according to
the following procedure.
3. Isolate the mains power supply.
4. Undo the two grille securing screws and
remove the grille (Fig. 12).
5. Pull the four tubular inserts out of the rear of
the grille and remove the filter (Fig. 13).
6. Slide out the heat exchanger (Fig. 14).
7. Wash the grille, filter and heat exchanger in
warm water using a mild detergent and dry
thoroughly.
Keep water away from all electrical components
and wiring within the unit.
If the filter cannot be cleaned, a replacement is
necessary (Part No. HR100RF4).
8. Reassemble in reverse order ensuring that
the filter and inserts are seated correctly in the
grille. The heat exchanger should be
repositioned with the ‘Top’ label facing the front
and pointing upwards.
9. Switch the power supply on and check the
operation of the unit.
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Fig. 12
Fig. 13
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Fig. 14
Securing Screws
Grille
Filter
Tubular Insert
Grille
Heat Exchanger