Vent-Axia HR400 Guía del usuario

HR320 & HR400

Whole House Ventilation System

With Heat Recovery

Installation and

Servicing Instructions

Please leave these instructions with the user

HR400

HR320

1.0Introduction 4

2.0Site Requirements 5

3.0Installation 7

4.0Electrical 17

5.0Commissioning 18

6.0Servicing 20

7.0Fault Finding 21

8.0Guarantee 22

Section Page

Contents

1.0 Introduction

1.1 Description

1. The HR320 and HR400 are a

range of whole house ventilation units

(Figs. 1 & 2).

The ventilation unit works in conjunction with a

duct system enabling air to be transferred

throughout the house.

The whole house system works by replacing

the warm stale moist air from the house, with

fresh air from outside. The fresh air passes

through a highly efficient heat exchanger and is

prewarmed by the heat which is recovered from

the extracted air. The heat exchanger recovers

up to 70% heat from the outgoing stale air.

1.2 Operation

1. The unit is designed to switch between trickle

and boost settings to give optimum

performance. This can be achieved manually

through a switch or pull cord, or automatically

using a remote humidity sensor.

Trickle is continuous low speed at which the air

in the property is changed approximately once

every two hours.

Boost increases the ventilation rate throughout

the property for manual control. Under

automatic control the unit changes to boost on

increase in relative humidity above a set point.

It reverts to trickle when the relative humidity

drops below the set point.

NOTE: The system is audible when

operating at boost speed.

2. Speed control of the unit is via a separate

transformer (VCON77) which is capable of

giving a range of six speeds (Fig. 3). Any two

speeds can be selected on installation to give

trickle and boost settings most appropriate to

the system.

With the units operating on boost setting the

electrical power consumption is;

HR320 - 200W

HR400 - 305W

NOTE: Refer to the VCON77 instructions for

information on installation and speed

selection.

Fig. 1

Fig. 2

Fig. 3

HR400

HR320

VCON77

2.1 Information

1. The fan unit is to be permanently connected

to the mains electrical supply and must be

installed by a suitably qualified person.

2. The fan unit must be sited and connected in

accordance with UK Building and IEE Wiring

Regulations (BS 7671) or regulations and /or

standards appropriate to the country of use.

3. Wiring to the fan unit in the UK must be via

a 3 Amp fused and switched connection unit

incorporating a double pole switch having a

contact separation not less than 3mm and

conforming to BS 5733 or BS 1363 Part 4. The

connection must be located outside of a fixed

bath, shower or wash hand basin. The wiring

should be suitably (BASEC or HAR) approved

cable of appropriate current carrying capacity.

4. The fan unit is Class 1 and must therefore be

earthed.

5. The fan unit must be connected to a trapped

drainage system to allow condensate to be

freely drained from the unit to the chosen

discharge point.

6. If the fan is installed in an unheated roof

void, or similar location, it should be insulated

together with any associated ducting within this

space.

7. The fan unit must be sited away from direct

sources of heat in excess of 40°C.

8. Do not position an internal extract valve/grille

in the vicinity of excessive levels of airborne oil

or grease i.e. above or close to a cooker.

9. If it is intended to fit an extract terminal/grille

in a room containing a fuel burning appliance,

the installer must ensure that provision for air

replacement is adequate for both appliances

and is in compliance with the requirements of

Part F of the current edition of the Building

Regulations.

2.0 Site Requirements

2.1 Information (cont)

10. The external grilles/terminals for the system

must be sited at least 1m away from the flue of

a fuel burning appliance, in compliance with the

requirements of Local Authority, Building

Regulations and any other relevant Codes of

Practice.

11. All safety regulations and requirements must

be strictly followed to prevent hazards to life

and property both during and after installation

or servicing.

12. Ensure that the mains electrical supply is

switched off before commencing installation,

maintenance or servicing.

13. Fire compartmentation must be maintained

to comply with the requirements of the current

edition of the Building Regulations. Where

applicable fire dampers complying with the

recommendations of BS CP 5588: Part 9 will

require to be installed in the ducting installation.

14. Do not locate fittings (QTET, QTB90,

QTB45) closer than 2.5 diameters to each other

or to supply/extract terminal (SV100/EV100).

15. Never locate tees (QTET) directly over or

adjacent to a terminal housing otherwise noise

will be generated.

3.0 Installation

3.1 Installing the Fan Unit

1. Check the diagrammatic ducting layout

drawing to ensure that the proposed duct

routes, fan unit and air terminal locations can

be accomodated. If in doubt refer to the

Technical Department.

2. The units are suitable for either vertical or

horizontal mounting. After noting the positions

of the electrical connector, duct spigots and

drainage connection on the unit, choose a

suitable installation site for the unit. The most

desirable location for the unit, in single and two

storey properties with a roof space, is in the

roof space.

3. Never locate the unit over a sleeping area -

above the landing or bathroom is always

preferred. 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.

Condensate Drainage

HR400

4. The condensate drain is supplied fitted to the

unit as shown (Fig. 4).

HR320

5. The unit is supplied with a 22mm diameter

condensate drain fitting, packed loose in the

box. The WH unit casing is moulded with two

22mm diameter drainage spigots in the bottom

corners. The casing of the unit can be set up for

right hand or left hand drainage by cropping the

domed end off either one of these spigots and

pushing on the condensate drain fitting (Fig. 5).

6. The units 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. Parts ref. CP, CPC and CPE are

included with the kit. Connect the drainage

system using the parts provided, jointing the

PVC pipework and fittings using PVC cement to

form watertight joints.

NOTE: Trap should be charged/filled before

operating the system and should be

checked, especially in summer.

BEWARE: A blocked condensate outlet pipe

due to insufficient pipe run (gradient) will

quickly lead to water damage.

Condensate Drain

HR400

HR320

Condensate Drain

Fig. 4

Fig. 5

3.0 Installation

Top Cover

Fig. 7

Fig. 6

Heat Exchanger

Filter

Drain

Outlet

Condensate

Trap

Joists

Inclined

Platform

Acoustic Mat

Condensate

Drain

Mounting Pad

3.1 Installing the Fan Unit (cont)

Horizontal Mounting (Fig. 7)

7. Before installation of the fan unit, a wooden

platform must be provided to mount the unit on.

8. The platform should be constructed from

50mm x 100mm timber bearers with a 19mm

block board deck.

9. The platform should incline the unit to ensure

a fall to the drain outlet. An acoustic mat

(ACMW/HOUSE) can be fitted on top of the

board to minimise vibration.

10. Remove the top cover and withdraw the

heat exchanger from the casing. Carefully drill

four holes through the mounting pads.

11. Secure the casing to the platform deck

using four No.8 round head screws and large

pattern washers to dissipate the load (Fig. 6).

3.0 Installation

3.1 Installing the Fan Unit (cont)

Vertical Mounting HR400 (Fig. 8)

12. The HR400 can be mounted

vertically by securing with plugs and screws

through the casing (see horizontal mounting).

Vertical Mounting HR320

The HR320 is supplied with a wall mounting kit.

13. Hold the unit against the wall and mark the

horizontal base line.

14. Remove the unit and position the mounting

channel on the line.

15. Mark through the three holes and drill and

plug them (Fig. 11).

16. Secure the mounting channel to the wall

using the screws provided (Fig. 11).

17. Locate the unit’s lower mounting rib in the

channel and mark the position of the upper

slotted mounting lug. Drill and plug the wall

(Fig. 9).

18. Secure the unit to the wall ensuring a large

pattern washer is used on the fixing lug (Fig. 9).

HR400

HR320

Fig. 8

Fig. 9

Fig. 10

Fig. 11

Mounting Channel

Securing Screw

and Washer

Upper slotted

Mounting Lug

3.0 Installation

3.2 Installing the Ducting System

1. Cut off the closed ends of the duct spigots

that are to be connected to the duct system.

Ensure that no cutting debris falls into, or

remains in the unit as this could damage the

balanced impellers and cause excessive noise

and vibration.

2. 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.

3. Place the terminal housing in the hole in the

ceiling and secure to the back ring with the four

screws provided.

4. 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

(Fig 12).

5. 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.

6. Fix in position all vertical supply and extract

air ducting being conveyed between ground

floor ceiling level and the loft space (Fig 13).

Terminal Housing

Plaster Board

Securing Ring / Back Plate

(for fire valves)

Securing Screw

Terminal

Supply and Extract Air Terminals SV100 / EV100

Typical Installation

QT3

Joist

RD040

Floor Boards

Joist Direction

Terminal Housing

Plaster Board

EV100/SV100

RD015

Fig. 12

Fig. 13

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