Vent-Axia HR100R User guide

CE-1-11/00

HR100R

Mini Air Handling Unit -

For Ducted Ventilation With Heat Recovery

Installation and

Servicing Instructions

Please leave these instructions with the user

CE-1-11/00

1.0Introduction 4

2.0Site Requirements 5

3.0Installation 6

4.0Electrical 10

5.0Commissioning 11

6.0Maintenance 12

7.0Optional Extras 13

8.0Notes 14

Section Page

Contents

1.0 Introduction

CE-1-11/00

1.1 Description

The Vent-Axia HR100R is a remote mounting unit to

provide balanced ventilation with up to 70%

heat recovery for applications where there is no

immediate access to an external wall. The

HR100R is ideal for installations involving internal

bathrooms and meets building regulation

requirements for this application.

A two speed motor provides for constant low

rate ventilation with a boost speed option. Fresh

pre-warmed air from outside is continually

provided to the room with simultaneous

extraction of stale air and smells. Heat is

transferred from outgoing air to the fresh air

supply with zero cross contamination,

maintaining internal temperatures and providing

a fresh environment.

2.1 Information

1. 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).

2. The unit is intended for permanent

connection to the mains electrical supply.

3. The HR100R is intended for fixed wiring

installation.

4. Ensure that the mains electrical supply is

compatible with the product’s rating label.

5. The unit must be sited away from direct

sources of heat in excess of 40°C.

6. Do not site the ceiling diffusers in the vicinity

of excessive levels of airborne oil or grease.

7. If the ceiling diffusers are installed in a room

containing a fuel burning appliance, the installer

must ensure that air replacement is adequate

for both appliances.

8. The external grilles 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.

9. 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.

10. Ensure the mains electrical supply is

isolated before commencing installation, or

maintenance.

2.0 Site Requirements

CE-1-11/00

3.0 Installation

CE-1-11/00

3.1 Installing the Unit

1. Check that all components have been

delivered, as identified in the delivery note.

Notify the supplier of any errors or omissions

immediately.

2. Check the diagrammatic ducting layout

drawing to ensure that the proposed duct

routes, fan unit and air terminal locations can

be accommodated. If in doubt, refer to the

Technical Department.

3. The unit is designed to be mounted

horizontally. After noting the positions of the

electrical connector, duct spigots and drainage

connection for the unit, choose a suitable

installation site for the unit. The most desirable

location for the unit is normally within the roof

space.

4. Never locate the unit above a sleeping area.

The most suitable position is normally above

the landing or bathroom. The selected site must

allow adequate space around the unit for the

removal of the access panel and heat

exchanger for maintenance and servicing

puposes.

5. When installing the unit, a suitable platform

must be made. This should be built from

chipboard or blockboard (19mm preferred). This

board should be raised enough to facilitate the

mounting of the unit above joist level.

6. The unit must be positioned so that the

condensate outlet can be trapped and the

condensate conveyed properly with a

continuous gradient to discharge through the

gable or to the eaves gutter in the selected

location.

7. Connect the drainage system as appropriate

using PVC pipework, joined using PVC cement

to ensure of watertight joints.

N.B. The trap should be charged/filled before

operating the system, and should be checked

especially in summer. Also note that a blocked

condensate outlet pipe due to insufficient pipe

gradient will quickly lead to water damage.

8. A shell bit is recommended for drilling holes

in the ceiling to accomodate the housings for

supply and extract air terminals (SV100 and

EV100). Make sure that you are not drilling into

structural members, water or gas pipes or

electrical cables and that there is room behind

the plaster board for duct access and securing

ring. Ceiling terminals should preferably be

fitted equidistant from adjacent walls bearing in

mind that coving may already be fitted or may

be fitted at a later date.

E100R Unit

Joist Condensate Trap (50mm Min)

Mounting

Platform

3.0 Installation

CE-1-11/00

3.1 Installing the Unit

9. Place the terminal housing in the hole in the

ceiling and secure to the back ring with the four

screws provided.

10. For two storey new build properties it is

recommended that the ground floor terminal

housings are secured in position in advance of

the plasterboard panels being fixed, by

obtaining a sheet of plasterboard of the type

and thickness to be used. Cut a square of the

sheet to just span two joists in the corner where

the terminal is to be fitted. Remember that the

edge of the sheet on the inner joist should only

rest on half of the joist thickness. This allows a

fixing surface for the next sheet of plasterboard

to be secured to when it is fitted. Tack up the

plasterboard in position on the ceiling and

connect up and seal the duct and fittings.

11. For two storey existing properties it is

necessary to lift the floor coverings at first floor

level above the terminal positions to gain

access to the terminal housings to secure and

seal the duct and fittings.

12. Fix in position all vertical supply and extract

air ducting being conveyed between ground

floor ceiling level and the loft space.

13. The external grilles for intake and exhaust

air should be positioned so that the exhaust air

is not drawn in again.

14. If the grilles are fitted in the same gable at

the same height, a minimum of 1m between

grilles is recommended.

15. If the grilles are positioned above one

another the distance apart should be at least

1m with the exhaust grille at the top.

16. Roof ventilators placed on the same roof

surface should be positioned at the same

distances as the grilles.

17. Always ensure that all exhaust grilles/roof

ventilators are placed higher than the top edge

of the highest window and at a distance of at

least 1m from the nearest window.

Terminal Housing

Plaster Board

Securing Ring / Back Plate

(for fire valves)

Securing Screw

Terminal

3.0 Installation

CE-1-11/00

3.1 Installing the Unit

18. External grilles placed in the soffit should

be positioned at the same distances as

indicated for gables.

19. The Quicktube Rigid UPVC duct system

permits fast, easy assembly whilst ensuring

pressure-proof system sealing.

20. The ducts are delivered in lengths of 3m

and are easily shortened as required with a

duct saw or a similar fine toothed saw. We

recommend that you file the edges of the ducts

after shortening.

21. Assemble the duct and fittings, following as

closely as possible the diagrammatic ducting

layout. Ensure that the duct is raised above

joist level to allow for thermal insulation of the

ducting.

22. Each straight length of duct is assembled

using a flexible connector (QTC) to join the two

ends, whilst 90°and 45°diversions and

branches are accomplished with flexible fittings

(QTB90, QTB45 and QTET). The duct is a push

fit into the socket of the connector and fittings.

23. Once assembled the joints are secured with

duct tape (DT30) to provide an airtight seal.

Ensure that the tape is secured over the

complete joint area to provide an airtight seal.

24. If the loft space is unheated the unit and

ducting will require to be thermally insulated to

preclude condensation occuring and to

minimise heat loss. This requirement must be

observed in the planning and routing of the

duct system.

25. The insulation recommended is Alreflex 1L1

which comprises 3mm thick polyethylene

bubble sheet laminated on the external surface

with aluminium foil protected by a thin

polythene film. The product is CFC and HFC

free and has a surface spread of flame of Class

1 tested to BS476 Part 7/971. It should,

however, be protected from open flames or

sparks and stored apart from highly flammable

materials.

3.0 Installation

CE-1-11/00

3.1 Installing the Unit

26. The material provides resistance to heat

loss from the distribution ducting and a highly

effective vapour barrier when all joints are

sealed with metallised tape. It is light but robust,

not easily damaged in storage or during

construction and is rot proof, water and vapour

resistent, durable and can be expected to

remain an effective insulant for the normal life

span of a building.

27. The insulation is supplied in 1.5m long

preformed sections for application to the ducting

at the time of installation. All joints should be

secured using the metalised tape (DTA30)

provided to ensure that a continuous vapour

seal is maintained.

28. The use of flexible ducting should be limited

to an absolute minimum. If used it should be

fully stretched in order to minimse pressure

loss.

29. Offer the unit on to the mounting surface,

ensuring that it is not susceptible to movement

under operation. Use directional airflow

indicators on the top of the unit to ensure the

correct connection to external and internal

vents.

30. Mate up the ducting as appropriate,

ensuring that the airflow is in line with the

directional indicators.

31. Determine the most appropriate siting

position for the appropriate control. Normally,

this would either be a manual control switch

(NBSW), pull-cord switch (PCSW) humidity

switch (HS6) or speed control switch

(VCON100).

32. Determine the appropriate wiring

connections as outlined within section 4, and

wire in accordance with current IEE Wiring

Regulations, ensuring that the mains feed is

isolated before making any connections.

CE-1-11/00

4.0 Electrical

4.1 Electrical Connections

230V 50Hz 12W (normal) 31W (boost)

NOTE: 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.

HR100R Terminals 3 amp fused supply

NNeutral

Live

Black

Brown

Blue

Green/Yellow Earth

HR100R Terminals 3 amp fused supply

NNeutral

Live

Black

Brown

Blue

Green/Yellow Earth

HR100R Terminals

3 amp fused supply

Neutral

Live

Black

Brown

Blue

Green/Yellow

Earth

HR100R Terminals

3 amp fused supply

NNeutral

Live

Earth

HR100R Terminals

3 amp fused supply

NNeutral

Live

Black

Brown

Blue

Green/Yellow Earth

Continuous Normal Speed

Continuous Boost Speed

VCON100: Manual Normal to Boost Speed

Switching and ON/OFF Control

NBSW and PCSW: Manual Normal to Boost

Speed Control

HS6: Automatic Normal to Boost Speed Control

TIM2 Terminals

Neutral

Link Light fitting if

appropriate

Switched live

Mains via switched

fused spur

Live

Earth

HR100R

Terminals

HR100R

Terminals

3 amp fused

supply

Neutral

Live

Switched Live

Light

Earth

For units switching to boost on operation of a light switch, an

in-line timer (order code TIM2) should be wired into the circuit

as shown below.

Automatic Control

The HR100R unit operates on continuous trickle ventilation.

Operation of switch turns unit to boost ventilation. When switch

is turned off units continue to operate on boost for a preset

period - adjustable 2-30 minutes.

The HR100R MUST NOT be wired in conjunction with a light

switch, units will fail.

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