Vent-Axia HR100W User guide

HR100W, HR100WH & HR30

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.

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

1.0 Introduction

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

Fig. 2

270mm

Fig. 3

195mm

500mm

Min

125mm

Min

125mm

Min

220mm - 280mm

adjustable

370mm

3.0 Installation

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

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

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

Fig. 11

Terminal Block

Cover

Heat Exchanger

Securing Screws

Grille

HR100WTerminals

3 amp fused supply

NNeutral

Live

Earth

HR100WTerminals

3 amp fused supply

NBSW/PCSW

NNeutral

Live

Earth

HR100W/HR100WH

Terminals

3 amp fused

supply

NNeutral

Live

Switched Live

Light

Earth

HR100WTerminals VCON100 Terminals

3 amp fused supply

Neutral

Live

Earth

HR100WTerminals 3 amp fused supply

NNeutral

Live

Earth

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

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.

Fig. 12

Fig. 13

Fig. 14

Securing Screws

Grille

Filter

Tubular Insert

Grille

Heat Exchanger

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