Vent-Axia HR205, HR204 User, Installation & Servicing Instructions

Download

Page 1

Whole House Ventilation System

with Heat Recov ery and Cooker Hood(HR205)

User, Installation & Servicing Instructions

Please leave these instructions with the user

Page 2

Contents

Section

1.0 User Information

2.0 General Layout

3.0 Technical Data

4.0 Appliance Operation

5.0 Installation Requirements

6.0 Installation

7.0 Wiring Diagrams

8.0 Commissioning

9.0 Maintenance

10.0 Changing Components

11.0 Fault Finding

12.0 Short Parts List

Page

Page 3

1.0 User Information

The HR204 (Fig. 1) and HR205 (Fig. 2) are whole house ventilation units.

This appliance must be installed in accordance with the manufacturers’ instructions and the regulations in force.

Duct systems must be installed in accordance with CIBSE guides and BRE Digest 398.

Read the instructions fully before installing or using the appliance.

Warning : The ventilation for any open flued appliance must always be considered before siting the extract and inlet vents, the vents must also be sited away from other flue terminals, ventilators etc. on the outside of the dwelling. In addition there shall be adequate ventilation of the room when the cooker hood is used at the same time as appliances burning gas or other fuel. The exhaust air duct must not be discharged into a flue which is used for exhausting fumes from appliances burning gas or other fuels. Refer to the relevant current British Standard Codes of Practice, Part J of the Building Regulations England and Wales and Part F of the Building Standards (Scotland) Regulations.

Page 4

1.0 User Information

• HR204

Important:The HR204 is not suitable for installation above any cooking appliance.

The HR204 is a mechanical ventilation with heat recovery (MVHR) unit. The unit provides continuous extraction of stale air from the dwelling typically from the bathroom and from the kitchen. The stale air passes through the heat exchanger before being ducted to outside.

Fresh air from the outside is continuously drawn into the unit and passed through a filter and then into the heat exchanger. In the heat exchanger the fresh air is prewarmed and ducted into the dwelling typically to living rooms/ bedrooms.

• HR205

The HR205 is a mechanical ventilation with heat recovery (MVHR) unit, designed solely to operate with the Vent-Axia telescopic cooker hood. The unit provides continuous extraction of stale air from the dwelling typically from the bathroom and the kitchen. The stale air passes through the heat exchanger before being ducted to outside.

Fresh air from the outside is continuously drawn into the unit, passed through a filter and then into the heat exchanger. In the heat exchanger the fresh air is prewarmed and ducted into the dwelling typically to living rooms/ bedrooms.

When the telescopic hood is extended the MVHR unit switches automatically to boost. The hood draws steam and fumes from cooking through metal filters and direct to outside.

Important: The cooker hood must always be fully opened when the cooker /hob is in use.

Warning: Do not flambé under the cooker hood

Page 5

1.0 User Information

Cleaning the Unit

Warning: Disconnect from mains electrical supply before cleaning any components.

Note: It is important that any door or cupboard front covering the MVHR unit is easily removab le by the user as access for regular cleaning of the air filters and heat exchanger is required.

Warning: Failure to clean the cooker hood and its filters as described below will lead to a fire risk.

Release hand fastners

Air inlet filter pull out, brush & vacuum clean

Warning

Pull forward & remove the outer case

FRONT

Use strap to pull out heat exchanger.

WiringService

WHC0006A

The cooker hood and filters should be checked and cleaned every 3 months.

Fig. 3

1.1 Heat Exchanger - HR204 & HR205

1. Lift off the front door panel by releasing the two hand screws and lifting upwards.

2. Note how the heat exchanger is fitted and by using the plastic strap pull forwards to remove.

3. If necessary the heat exchanger can be washed in warm water using a mild detergent. Take care not to damage the fins. Re-assemble in reverse order after thoroughly drying.

1.2 Air Inlet Filter - HR204 & HR205

Fig. 4

1. Lift off the front door panel by releasing the two hand screws and lifting upwards.

2. Remove the air inlet filter by pulling forwards.

3. Carefully brush and vacuum the filter in a well ventilated area.

HR205

Remove the cooker hood filters for cleaning

View from below the unit

Fig. 4

Fig. 5

4. Re-assemble in reverse order.

1.3 Cooker Hood Filters - HR205

Fig. 5

1. Rear Filter - To remove the rear filter grip and pull inwards the grey handles at either side and slide the filter forwards and downw ards.

2. Front Filter - To remove the front filter grip and pull inwards the grey handles at either side and drop the filter downwards.

3. The filters can be washed in a dishwasher or in warm soapy water. Thoroughly dry the filters and re-assemble in reverse order.

Note: For spare parts see Section 12.

Page 6

2.0 General Layout

HR205

Cover Panels removed for clarity.

1. Heat Exchanger (Lexan)

2. Fan (Fresh Air In)

3. Fan Capacitor (RH)

4. Electrical Control/Transformer

5. Fuse (3.15amp fast blow)

6. Terminal Block

7. Overheat Sensor

8. Lower Fixing Hole

Fig. 6

9. Fire Damper

10. Condensate Drain (15mm)

11. Condensate T r ay

12. Alternative outlet for condensate

13. Fan (Extraction)

14. Fan Capacitor (LH)

15. Inlet Air Filter

16. Air Connections (4 off)

Page 7

2.0 General Layout

HR 204

Cover Panels removed for clarity

1. Heat Exchanger (PVC)

2. Fan (Fresh Air In)

3. Fan Capacitor (RH)

4. Electrical Control/Transformer

5. Fuse (3.15amp fast blow)

6. Terminal Block

7. Lower Fixing Hole

8. Alternative outlet for condensate (bottom)

9. Condensate Drain (15mm)

10. Condensate Tray

11. Alternative outlet for condensate (side)

12. Fan (Extraction)

13. Fan Capacitor (LH)

14. Inlet Air Filter

15. Air Connections (4 off)

Fig. 7

Page 8

3.0 Technical Data

HR205 HR204

Including cooker hood

Dimensions (mm) Height 458 412 Width 598 552 Depth 285 285

Min. Clear ances (mm) Both sides 1 5 Above casing 200 200 Below casing 700 100 Front f or servicing 250 250 Front in operation None None

Lift weight (kg) 20.6 16.7 V oltage tappings Po wer consumption (watts) Po wer consumption (watts)

Lights off Lights on 80 16 96 16 100 27 107 27 120 40 120 40 140 52 132 52 160 65 145 65 230 111 191 111

Duct connections All suitable for 100mm circular ducts Condensate connection Suitable for 15mm pipe

Electrical supply 230v – 50Hz appliance must be connected to an earthed supply External fuse rating 3 amps Internal fuse rating Transformer - 3.15 F

Filtration EU2

Page 9

The MVHR unit has five normal

fan speed

settings and

one boost

setting. The

performance

curve chart

gives the

ventilation rates

at each fan

speed setting

compared to the

pressure drop of the system.

3.0 Technical Data

Flow Rate Vs Pressure Chart

350

100Pa @

300

250

230v

200

150

Pressure / Pa

100

0 2010 30 50 7040 60 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230

160v

140v

120v

100v

80v

Flow rate / m³ / hr

100m³/Hr

WHC0022A

240

Fig. 8

Fig. 9

Page 10

4.0 Appliance Operation

• HR204

Optional Extras

External Controls

orm

Normal/boost

oost

Switch NBSW

Normal/boost

Pull Switch

PCSW

Humidity Sensor

HS6

When the electricity is switched on the external controls (humidstat or normal/boost switch) supply electricity to the fans.

On normal running the fans run at the voltage set during commissioning (80,100,120,140 or 160 volts).

Air is then moved through the unit (see Fig 8) If the fans become jammed then a thermal trip in the fan senses temperature rise and breaks the electrical supply to the motor. This can only be

reset by disconnecting from the mains supply.

If the external controls call for boost operation the fans automatically run at 230 volts and increase the air movement of both exhaust and inlet air.

• HR205

When the electricity is switched on the unit checks for continuity across the overheat thermostat.

Power ON

Normal Operation

Fans run in whole

house mode at 80, 100,

120, 140, or 160 Volts.

Cooker

Hood

Open

Boost Operation

Fans run at 230 Volts.

Cooker

Hood

Closed

Continuous extract

typically from

bathroom/kitchen.

Continuous supplying

of fresh filtered

air typically to

living room/ bedroom.

Lights on the Cooker

Hood can be used.

Increased extract rates,

also extract from

Cooker Hood.

Increased supply to

living room/bedroom.

The fans then run at the voltage set during commissioning (80,100,120,140 or 160 volts).

Air is then moved through the unit (see Fig 8) If the fans become jammed then a thermal trip in the fan senses temperature rise and breaks the electrical supply to the motor. This can only be

reset by disconnecting from the mains supply.

If the overheat thermostat senses an elevated rise in temperature from the cooker/hob it breaks the electrical supply to the fans. The overheat

thermostat can only be reset by disconnecting the mains supply to the unit.

In the event of a serious fire at the hob (e.g. chip pan fire) the in built fire damper will operate sealing the clean air side of the unit from the fire.

Lights on the Cooker

Hood can be used.

WHC0021A

Fig. 10

Page 11

5.0 Installation Requirements

5.1 Location

1. The cooker hood MVHR unit is only suitable for installation above a domestic cooker or domestic hob. The HR205 must be sited a minimum of 700 mm above the cooker/hob.

2. The exhaust duct must pass through an outside wall or roof and discharge to atmosphere in a suitable position .The clean air inlet duct must pass through an outside wall or roof and be suitably positioned to provide an adequate fresh air supply from atmosphere.

5.2 Site requirements

1. For the HR205 a flat vertical area 1332mm high x 600mm wide is required for installation.

For the HR204 a flat vertical area 692mm high x 562mm wide is required for installation.

Important: The HR204 is not suitable for installation above any cooking appliance or with any extraction system servicing a cooking appliance.

2. Before installation consideration must be given to the position of the ductwork connections, the electrical connection and the condensate pipe connection.

Warning: Please check the information on the data plate is compatible with local supply conditions.

3. The installation must be carried out by a competent person and be in accordance with the relevant Building regulations (Scotland) (consolidation), the Local building regulations, the current I.E.E. Wiring regulations.

Reference should also be made to the BRE digest 398 and CIBSE guidelines.

Warning: The addition of anything that may interfere with the normal operation of the appliance without the express written permission of Vent-Axia Ltd could invalidate the appliance warranty and infringe regulations.

Warning: If the unit is fitted in a room containing a bath or shower then reference should be made to the current I.E.E. Wiring Regulations and Building Regulations.

Page 12

5.0 Installation Requirements

5.3 General

1. The MVHR unit has five normal fan speed settings and one boost setting. The performance curve chart (Section 3, Fig. 8) gives the ventilation rates at each fan speed setting compared to the pressure drop of the system.

2. The transmission of noise along ducts should be reduced by fitting noise attenuation ducts Part No. FS100.

5. 4 Ducting

1. The outside exhaust duct and outside air intake duct should be sited a minimum of 1 metre apart to minimise the risk of contaminated air being drawn into the house.

2. The duct work system should be sized and installed to minimise the pressure loss along it.

Examples of different ducting & fittings

Outside

Wall

RD104WHRD104WH

Terminals

minimum

1m apart

NQT100

IQTB45

0.25m

NQT100

NQT40

NQT100

IQTB90

NQT100

NQT40

3. Using larger diameter pipes and keeping the number of bends and fittings used to a minimum will reduce the pressure drop and allow the unit to be set at a lower fan speed.

4. Ducting should be insulated in cold areas to minimise heat losses. All duct joints should be suitably taped to ensure an air tight seal.

RD060

RD015

1.5m

EV100

Bathroom

RD015

RD060

RD015

SV100

Living Room

Fig. 13

IQTB45

IFD100

HR205

Fresh air in

Exhaust out

RD070

Warm air out

Hot stale air in

WHC0010A

Page 13

5.0 Installation Requirements

5.5 System controls

1. An optional Humidistat (HS6) Part No. 370254 is available for automatic boost control.

2. An optional boost switch (NBSW) Part No. 370495 is available for manual/boost control remote from the unit. An optional pull cord boost switch (PCSW) Part No. 370278 is available for manual/boost control remote from the unit.

5.6 Electrical supply

1. External wiring must be correctly earthed , polarised and in accordance with the current I.E.E. Regulations.

2. The mains supply must be 230v ~ 50Hz fused at 3amps

Note: The method of connection to the mains supply must facilitate complete electrical isolation of the appliance. Connection may be via a fused double pole isolator with a contact separation of at least 3mm in all poles and supplying the MVHR unit and its system controls only.

5.7 Condensate drain

Fig. 14

1. The condensate pipe should have a continuous fall of 10° (1 in 6) with as much of the condensate pipe as possible run inside the property to avoid freezing. The pipe should also incorporate a trap with a minimum height of 75mm. See Fig. 17.

2. The HR205 has two alternative condensate outlet positions: - rear and left hand side HR204 has three condensate outlet positions: rear, bottom and left hand side.

The

Page 14

6.0 Installation

Make sure the Wall

Template is level

Mark position

of the

condensate

pipe 15 mm

(drill where

required)

Top of hob

6.1 Preparation

1. Check site requirements (Section 5) before commencing.

rm A

a t St o

h es r

Mark position

of the

fixing holes

2 top (minimum)

& 1 lower

then drill & plug

2. Remove the fixing template from the MVHR carton.

After considering the site requirements position the template on the wall ensuring it is level.

3. Mark the positions of at least two top fixing holes, the lower fixing hole and the condensate outlet.

Measure 700mm

from hob

If required mark off the positions of the four duct connections.

4. Drill and plug the wall at the fixing points and drill the condensate hole.

5. The top two screws should now be fitted leaving enough space for the keyhole fixing slots to engage.

6. Place the MVHR unit on its back (Fig. 15). Lift

HR205

off the front door panel by releasing the two hand screws and lifting upwards.

Mark out the

position of the

unit of the

Wall Template

Part No. 372706

Exhaust

Fresh AirInHot Stale

Out

Bottom of Mounting Brackets

4 Fixing Holes

(Key Holes)

Use one

hole each side

MVHR Side

Minimum Side

Clearance

24mm

(HR205c)

Minimum Side

Clearance

5mm

(HR204)

Back Case

Condensate Hole

Side Case Knock

Out Condensate Hole

Minimum Side

Clearance 1mm

Bottom Condensate

Pipe Exit (HR204 Only)

Minimum

Top

Clearance

200mm

Wall Template HR204 &

HR205

(with cooker hood)

Whole House Ventilation System

Minimum

Side

Clearance

(MVHR)

Minimum

Top Clearance for servicing

200

300

Minimum

Side Clearance (MVHR)

Minimum

Side

Minimum

Clearance

Front

(C.Hood)

Clearance

for servicing

250

Clearances

HR205c

Minimum Bottom

All dimensions

Clearance from Hob

700

Bottom of

Cooker Hood

Measure Minimum

Bottom Clearance

700mm

From Hob

(HR205c Model)

Minimum

Clearance

servicing

in mm

Fixing Hole

7. Remove the bottom electrical cover by releasing the 3 screws, pulling the panel forwards and disconnecting the earth lead to the panel.

Warm Air

Air In

Out

98mm

Minimum

Side

Clearance

Minimum Top Clearance for servicing

280

200

Minimum

Side

Front

Clearance for

250

Clearances

HR204

Minimum Bottom

Clearance

100

Bottom

Minimum Side

Bottom of MVHR Unit

Minimum Bottom Clearance

100mm

(HR204 Model)

Top of MVHR

Unit

MVHR

Clearance

24mm

(HR205c)

Clearance

5mm

(HR204)

Minimum Side

Clearance 1mm

Mains Cable Outlet

Side

understairs installation

WHC0013A

Stair Case

Example of a possible

HR204

Fig. 15

Ground Floor

Page 15

6.0 Installation

6.2 Assembly of the MVHR unit and the

cooker hood - HR205 only.

Remove

the

Cooker

Hood filters

before

fitting

Cooker

Hood to

MVHR

Unit

View from below the unit

Top View (MVHR Unit

placed on it's back)

Warning

FRONT

Use a packing piece to

hold

open

the

cooker

hood

1. Unpack the cooker hood, locate the four screws and washers and the protective box for the cooker hood plug and socket.

2. Open out the telescopic hood and remove the two metal filters by releasing the grey plastic springs and sliding out.

3. Offer up the hood to the MVHR unit and carefully feed the cable and four pin cooker hood socket through the hole in the back right hand side of the MVHR unit.

4. Align the cooker hood and attach it to the MVHR unit using the four screws provided.

Note: it will be necessary to support the telescopic hood when attaching it to the MVHR unit.

5. Carefully route the cook er hood cable and socket into the MVHR unit and engage it with the plug ensuring the locating lugs align.

It is important that the cables are routed away from the cooker hood outlet and fire damper.

WHC0032A

MVHR

Unit

Connect

Cooker

Hood

Grommet

Secure Cooker Hood to MVHR

Unit with 4 screws supplied

Correct route for cooker hood cable

connection (HR205)

Connector

Clamp the

Protective Box

around the

Connector

Cable

Clips

Grommet

HR205

The cable

must be

routed clear

of the fire

damper

6. Locate the assembled plug and socket in the protective box taking care to route the cables as shown (Fig. 16). Clip the bo x together and secure using the screws provided. Locate the large cable grommet in the hole and ensure it is seated correctly.

6.3 Condensate outlet

1. If the condensate pipe is to exit the unit at the left hand side, stand the unit up on its base taking care not to damage the telescopic hood and filters.

2. Locate the semi-pierced hole and carefully remove the metal disc.

3. Swap over the grommet used on the rear exit hole and seal the rear hole with duct tape or similar.

Note: The HR204 has an extra condensate outlet on the bottom panel.

Fig. 16

Page 16

6.0 Installation

6.4 Fitting the MVHR unit

1. Offer the combined unit to the wall and engage the keyhole slots over the screws previously fitted.

2. Make sure the unit is level and tighten the top screws before engaging the final screw.

6.5 Making the condensate connection

1. The condensate connector is suitable for 15 mm pipe.

2. The condensate pipe should incorporate a water trap to prevent foul air being drawn into the unit. The minimum height of the trap should be 75 mm.

Note: To ensure the condensate pipe is primed, slowly pour water into the condensate tray until it discharges into the drain.

Fig. 17

Page 17

6.0 Installation

6.6 Making the duct connections

1. The unit has four duct connections suitable for 100mm plastic pipe.

1. Exhaust outlet to outside

2. Air inlet from outside

3. Stale air inlet from dwelling

4. Fresh air outlet to dwelling

Notes: It is essential that the duct system is connected as indicated.

It is important that the duct system does not interfere with the correct fitting of the outer door and does not prevent the correct operation of the unit.

6.7 Controls

160 140 120

100

Fit bottom cover panel.

Warning

HR205

WiringService

FRONT

Position the white lead for the required fan speed setting, (160v fast to 80v slow available) 120v shown.

WHC0009A

Fig. 18

1. The HR204 requires external controls to enable normal/boost switching, see Page 20 Wiring Diagrams.

2. The HR205 can have optional external controls fitted, see Pages 18 and 19 - Wiring Diagrams.

6.8 Making the electrical connection

Warning: This appliance must be earthed

1. The normal running speed of the fans is set at 120v.

2. The unit must be set to the appropriate voltage as determined by air flow required and duct system pressure loss (see Section 5.3).

To change the voltage setting for the fans, unscrew and remove the white wire from the 120v connection on the controller.

3. Carefully insert the wire into the desired connection (80, 100, 120, 140 or 160) and secure the wire.

4. Fit the bottom cover panel.

5. Connect the flying lead to the mains supply see Section 5.6.

6. Check the electrical installation for; Earth continuity, short circuits, resistance to earth and correct polarity.

Page 18

7.0 Wiring Diagrams

HR205 MVHR Unit Wiring

Mains

230v

g/y

Fan

(air out)

g/y

For External Controls

g/y

Overheat Thermostat

Key Colors

b - Blue gr - Grey r - Red w - White

To Cooker Hood

Fan

(air in)

br - Brown g/y - Green/Yellow p - Purple bk - Black

g/y

Controller

w br grgr

160 140

120 100

g/y

WHC0031A

Fuse (3.15AT)

Earth for Inspection Panel

Fig. 19

boost speed 230v

Micro Switch

To MVHR

40 watts

bulb

Light Switch

HR205 Cooker Hood Wiring

bulb 40 watts

Page 19

7.0 Wiring Diagrams

HR205 MVHR Unit Wiring with optional Humidstat HS6

Mains

230v

(air out)

g/y

Fan

HS6 Humidistat

Common

Boost

Ordinary

Key Colors

b - Blue gr - Grey r - Red w - White

br - Brown g/y - Green/Yellow p - Purple bk - Black

Fan

(air in)

Remove Link

2 3

g/y

Overheat

Thermostat

To Cooker Hood

Controller

O B C

Fuse (3.15AT)

160 140 120 100

g/y

Earth for Inspection Panel

g/y

Mains

230v

(air out)

g/y

Fan

HR205 MVHR Unit Wiring with optional Normal/Boost Switch

Manual Normal /Boost

Switch NBSW or

Pull Switch PCSW

Common

Boost

Remove Link

Normal

2 3

g/y

w br

Overheat Thermostat

To Cooker Hood

Key Colors

b - Blue gr - Grey r - Red w - White

Controller

O B C

Fuse (3.15AT)

br - Brown g/y - Green/Yellow p - Purple bk - Black

160 140 120 100

L N

g/y

Earth for Inspection

Fan

(air in)

g/y

WHC0011A

Fig. 20

Panel

Page 20

7.0 Wiring Diagrams

HR204 MVHR Unit Wiring

Mains

230v

g/y

Fan

(air out)

g/y

For

External Controls

g/y

Fan

(air in)

Key Colors

b - Blue gr - Grey r - Red w - White

br - Brown g/y - Green/Yellow p - Purple bk - Black

For External Controls

Controller

O B C

Fuse (3.15AT)

160 140 120 100

g/y

WHC0033A

Earth for Inspection Panel

Fig. 21

Page 21

7.0 Wiring Diagrams

HR204 MVHR Unit Wiring with optional Humidstat HS6

Mains

230v

(air out)

g/y

Fan

HS6 Humidistat

Common

Boost

Ordinary

Key Colors

b - Blue gr - Grey r - Red w - White

br - Brown g/y - Green/Yellow p - Purple bk - Black

Fan

(air in)

N L

g/y

2 3

Controller

O B C

Fuse (3.15AT)

160 140 120 100

L N

g/y

Earth for Inspection Panel

g/y

Mains

230v

(air out)

g/y

Fan

HR204 MVHR Unit Wiring with optional Manual/Boost Switch

Key Colors

b - Blue gr - Grey r - Red w - White

Manual Normal /Boost

Switch NBSW or

Pull Switch PCSW

Normal

1 2 3

g/y

Boost

Common

Controller

O B C

Fuse (3.15AT)

br - Brown g/y - Green/Yellow p - Purple bk - Black

160 140 120 100

L N

g/y

Fan

(air in)

g/y

WHC0012A

Earth for Inspection Panel

Fig. 22

Page 22

8.0 Commissioning

8.1 Prepare for commissioning - HR205

1. Refit the front door panel by hooking it over the top lip of the appliance and swinging down. Tighten the two case screws.

2. Ensure the telescopic hood is retracted.

3. Turn on the electrical supply. The unit will now start running at the normal ventilation speed.

4. Pull the telescopic hood forward. The unit will now switch to boost speed.

5. Check the operation of the cooker hood lights.

8.1a Prepare for commissioning - HR204

1. Refit the front door panel by hooking it over the top lip of the appliance and swinging down. Tighten the two case screws.

2. Check the external controls are set to normal running.

3. Turn on the electrical supply. The unit will now start running at the normal ventilation speed.

4. Set the external control to boost. The unit will now switch to boost speed.

Page 23

8.0 Commissioning

8.2 Balancing the system

Inside View of

Supply V alve

Air direction

SV100

Adjust Ceiling Supply Valve for Living Room etc

Air Deflector

Plate

Locking Nut

to lock

the valve

in position

Air

Direction

Indictor

Note: It is important that a suitable anemometer is used to balance the system therefore giving the required ventilation rates to each room.

1. Set the appliance running on normal speed.

2. Make a preliminary adjustment of all the duct inlet and outlet louvres.

Note: The supply air terminal is directional and incorporates a deflector plate. Ensure that the deflector plate is correctly positioned so that the active part of the terminal is discharging to the room.

3. Check the flow rate and adjust if necessary the extract valve furthest from the appliance.

4. Check the flow rates and adjust if necessary the remaining extract valves.

5. Repeat the flow checks and adjust until the extract system is balanced.

6. Check the flow rate and adjust if necessary the inlet valve furthest from the appliance.

Inside View of

Extract Valve

Locking Nut

to lock

the valve

in position

WHC0029A

7. Check the flow rate and adjust if necessary the remaining inlet valves.

8. Repeat the checks and adjust until the system is correctly balanced.

Note: If the flow rates have been achieved with all the louvres nearly closed, it may be possible to reduce the fan speed and re-adjust the louvre settings.

8.3 Instruct the user

Instruct the user in the operation of the appliance. Hand over these instructions, giving advice on the necessity for regular servicing of the filters and heat exchanger.

Note: It is important that any door or cupboard front covering the MVHR unit is easily removab le by the user as access for regular cleaning of the air filter and heat exchanger is required.

EV100

Adjust Ceiling Extract Valve for Bathroom etc

Fig. 23

Page 24

Release handand fastners (Butterfly Bolts)

Air inlet filter pull out, brush & vacuum clean

Remove covers to inspect

Warning

LH/RH Fans & Fire Damper (clean as required)

HR205

Pull out & clean the Condensate Tray

Pull forward & remove the outer case

FRONT

Use strap to pull out heat exchanger.

WiringService

Pull Cooker Hood forward

9.0 Maintenance

Important: Before servicing ensure that the appliance is isolated from the electrical supply. After isolating from the electrical supply, allow one minute for the fans to stop rotating before servicing the appliance.

1. HR205 only -Extend the telescopic hood and remove the two metal filters. The cooker hood filters can be washed in a dishwasher; alternatively a hot hand wash will suffice. Check and clean the filters if necessary. Dry the filters thoroughly before re-fitting.

2. Lift off the front door panel by releasing the two hand screws and lifting upwards.

3. Identify the air inlet filter and remove by pulling forwards.

Taking note of the offset sliders, carefully remove the heat e xchanger by gently pulling forwards.

4. Remove the bottom electrical cover by releasing the 3 screws, pulling the panel forwards and disconnecting the earth lead to the panel.

5. Loosen the two screws on each side plate and lift to remove.

6. HR205 only - Check the cooker hood inlet for debris and fat deposits. Clean as required. Check the fire damper is in satisfactory condition and unaffected by debris and fat deposits. Replace if necessary.

7. Check both fans, fan compartments and

WHC0016A

exhaust duct outlets for deposits. Clean as necessary.

8. Remove the condensate tray by pulling forwards. Check and clean if necessary.

9. Check the condition of the four heat exchanger sealing strips and front door seal. Replace all seals as necessary (Fig. 24).

Remove

the cooker

hood

filters

for cleaning

View from

below the

unit

Fig. 24

10. Carefully wash the heat exchanger in warm soapy water taking care not to loosen the heat exchanger fins. Thoroughly dry the heat exchanger before re-fitting.

Note: Ensure the heat exchanger is located correctly in the offset sliders.

11. Carefully vacuum the air inlet filter. Replace if necessary.

12. Re-assemble in reverse order and re-fit the outer door ensuring the door makes a good seal.

Page 25

9.0 Maintenance

13. Turn on the electrical supply to the appliance. With the hood closed the appliance will run on normal setting. Extend the hood and the appliance will switch to boost setting. With the appliance on boost check the operation of the cooker lights

14. Check the condition of the ductwork system, the soundness of all joints and repair if necessary

Page 26

10.0 Changing Components

Bulkhead

Controller

Controller securing screws (4 off)

160 140 120 100

L N

Warning

Mounting bracket to bulkhead securing screws (2 off)

Controller Mounting Bracket

Rear View of the Controller

Take note of the fan speed setting, 120v shown. When the new controller is fitted, fit the white lead to the position of the old controller for the correct fan speed.

Controller

FRONT

IMPORTANT: ISOLATE FROM THE ELECTRICAL SUPPLY BEFORE STARTING ANY WORK ON THE APPLIANCE.

The fans continue to rotate for one minute after isolating from the electrical supply

10.1 Controller

1. HR205 Only - Fully extend the telescopic cooker hood and remove the two metal filters.

2. Remove the outer door by releasing the two screws and lifting the door up and forwards.

3. Remove the bottom electrical cover by releasing the 3 screws, pulling the panel forwards and disconnecting the earth lead to the panel. Make a note of the voltage setting for the fans and of the wiring arrangement for the controller.

4. Release all the wires connected to the controller.

5. Remove R.H. fan cover panel and remove the R.H. fan (see Section 10.3). Unscrew the two screws securing the controller mounting bracket to the bulkhead and remove the bracket and controller unit. Separate the bracket from controller by removing the four screws.

6. Re-assemble with the new controller in reverse order. Check the electrical installation

for; Earth continuity, short circuits, resistance to earth and correct polarity.

Overheat

Thermostat

Head

Overheat

Thermostat

Fig. 25

Sleeve

HR205

Cable

Overheat

Thermostat

Clip

Remove RH fan cover

panel & bottom cover panel.

Tie

Bulkhead Grommet

WHC0018A

10.2 Overheat thermostat - HR205 Only

1. Lift off the front door panel by releasing the two hand screws and lifting upwards.

2. Remove the bottom electrical cover by releasing the 3 screws, pulling the panel forwards and disconnecting the earth lead to the panel. Identify the connections for the overheat thermostat. Make a note of the routing for the overheat thermostat cable.

3. Release the overheat thermostat connections.

4. Release the sensor head by springing open the clip and pulling out the sensor head.

5. Remove the overheat thermostat taking care not to dislodge the bulkhead grommet.

6. Carefully locate the new sensor and position the lead as shown in Fig. 26. Re-assemble with the new overheat thermostat in reverse order.

Check the electrical installation for; Earth continuity, short circuits, resistance to earth and correct polarity.

Page 27

10.0 Changing Components

10.3 Extract fan and Inlet fan

Removal

of the

Lefthand

Fan

(righthand

fan similiar)

HR205

Slacken

the 2 rear

securing

screws

Fan

capacitor

Cable ties

FRONT

Warning

Remove LH cover to access the LH Fan

WiringService

Push Fan

Assenbly to the left

and pull

away from

unit

Fan support

bracket

1. Lift off the front door panel by releasing the two hand screws and lifting up wards.

2. Loosen the two screws on the side plate and lift to remove.

3. Release the clip on the plastic plug and disconnect the plug.

4. Slacken the two rear fan bracket screws.

5. Remove the two front fan bracket screws and remove the fan assembly. Note the position of the fan bracket relative to the fan.

6. Remove the bracket and re-fit to the new fan.

7. Re-assemble with the new fan in reverse order ensuring the cable does not foul the fan motor. Check the electrical installation for;

Earth continuity, short circuits, resistance to earth and correct polarity.

10.4 Fan capacitor

1. Lift off the front door panel by releasing the two hand screws and lifting up wards.

2. Loosen the two screws on the side plate and lift to remove.

Spade

terminals

Release

the

electrical plug

Fan securing

screws 4 off

Fan support

bracket

Fan

capacitor

Cable ties

Remove

the 2 front

securing

screws

Fan

3. Release the clip on the plastic plug and disconnect the plug.

4. Slacken the two rear fan bracket screws.

5. Remove the two front fan bracket screws and remove the fan assembly.

6. Disconnect the two 2.5 mm spade terminals from the capacitor.

7. Cut the two cable ties and remove the capacitor.

8. Re-assemble in reverse order with the new capacitor and use the new cable ties provided. Ensure the cable does not foul the fan motor.

Check the electrical installation for; Earth continuity, short circuits, resistance to earth and correct polarity.

WHC0020A

Fig. 26

Page 28

10.0 Changing Components

10.5 Fire damper - HR205 Only

HR205

Fit 4 new self-adhesive sealing strips

(see positions

1 to 4 below)

Fire Damper

4 Fixing

Screws

Re-fit new

heat

exchanger

1. Fully extend the telescopic cooker hood.

2. Remove the two metal filters.

3. Remove the outer door by releasing the two screws and lifting the door up and forwards.

4. Remove the bottom electrical cover by releasing the 3 screws, pulling the panel forwards and disconnecting the earth lead to the panel.

5. Remove the four screws that secure the fire damper and lift it away from the unit.

10.6 Heat exchanger

1. Lift off the front door panel by releasing the two hand screws and lifting up wards.

2. Gently ease the heat exchanger forwards and remove.

3. Re-assemble in reverse order taking care not to damage the heat exchanger seals.

Warning

With the Cooker Hood filters removed, pull off the old seal and clean the glue away.

HR205

1 3

10.7 Heat exchanger seals

1. Lift off the front door panel by releasing the two hand screws and lifting up wards.

2. Gently ease the heat exchanger forwards and remove.

3. Remove the four heat exchanger seals taking care to remove all the old adhesive backing.

WiringService

WHC0019A

4. Fit the new seals ensuring they make good contact with the location channel.

5. Re-assemble in reverse order taking care not to damage the heat exchanger seals.

10.8 Cooker hood seals

1. Fully extend the cooker hood.

2. Remove the metal filters.

3. Pull away the old cooker hood seal and remove any remaining glue. Use a small amount of solvent if necessary.

Adhesive Strip

Peel back adhesive strip &

fit new Cooker Hood Seal

Fig. 27

4. Peel back the adhesive strip and carefully fit the new seal as shown in Fig. 28.

5. Re-assemble in reverse order.

View from below the unit

Page 29

This page is intentionally blank

Page 30

11.0 Fault Finding

HR205 - Main Unit Fault Finding Chart

Before starting FAULT FINDING

carry out preliminary electrical systems checks

i.e. Earth Continuity, Polarity, Short Circuit

and Resistance to Earth.

START

Ensure the Cooker

Hood is closed.

Is there

mains voltage

across terminals

A1/A2?

Ensure continuity

between terminals

D5 & A1

and between

D6 & A2.

Check mains

supply.

YES

Is the

fuse on the

controller

O.K.

Investigate cause

and

rectify fault

Replace fuse

3.15AT

WARNING

If the Overheat sensor or Fan thermal trip has operated, check the entire system and unit for correct installation. Check all ducting outside & terminals for blockages.

IMPORTANT

When investigating overheating allow the unit to run long enough for any fault to become apparent.

Ensure all external controls are operating and are set to normal running. Ensure that a mains electrical supply is available to the unit.

YES

Is the voltage across terminals B1 &

B2 between 80v

& 160v?

Disconnect wires

from terminals

F1, F2 & F3. Ensure voltage selector wire is

correctly engaged.

Check external

Is the voltage

across F1 & B2

between 80v

& 160v?

YES

control wiring. Refer to 205 wiring diagram (section 7)

Reconnect wires

Replace controller

Replace

cooker hood

YES

Disconnect 4 pin

cooker hood plug.

voltage across

the blue & white

wires on the cooker hood

plug between

Rectify fault on plug and lead.

YES

to terminals

F1, F2 & F3.

Is the

80v and

160v.

cooker hood

Refer to diagrams below to identify terminals on components (e.g. A1, D3 etc).

Are both fans

operating?

YES

See Fan Fault Finding Chart

Note 1

Electricity supply must be isolated and Fan Motor temperature must be less than 100˚ to allow thermal trip to reset.

Note 2

Electricity supply must be isolated and Overheat temperature must be less than 80˚ to allow Overheat Thermostat to reset.

Fan

Plug

C.Hood

Plug

3 2 1

Connector

Block

1 2 3

4 5 6

Controller

B C

L N

Voltage Selector Wire

Fuse

(3.15AT)

1 2

160 140 120 100

WHC0035A

Page 31

YES

Is there adequate airflow at the appliance

inlets and

outlets

Clean filter &

heat exchanger

(section 9). Check

duct system and

terminals for blockages or

damage. Ensure

terminals are

adjusted correctly.

YES

Does the

appliance switch

to boost when the cooker

hood is opened? (Mains

voltage is present

across terminals

B1 & B2

Disconnect 4 pin

cooker hood plug.

Is the

mains voltage

across the blue &

brown wires on the

cooker hood

plug.

YES

Replace cooker

hood

11.0 Fault Finding

HR205 - Main Unit Fault Finding Chart

Do cooker hood

lights operate?

Are the light

bulbs faulty?

YES

Unit operating

Replace bulbs

satisfactorily

(Max. 40 watts)

Replace bulbs

(Max. 40 watts)

Ensure continuity

across cooker hood

plug and lead.

WHC0036A

Page 32

11.0 Fault Finding

HR204 - Main Unit Fault Finding Chart

Before starting FAULT FINDING

carry out preliminary electrical systems checks

i.e. Earth Continuity, Polarity, Short Circuit

and Resistance to Earth.

START

Is there

mains voltage

across terminals

A1/A2?

Ensure continuity

between terminals

D5 & A1

and between

D6 & A2

Check mains

supply.

YES

Is the

fuse on the

controller

O.K.

Investigate cause

and

rectify fault

Replace fuse

3.15AT

WARNING

If the Fan thermal trip has operated, check the entire system and unit for correct installation. Check all ducting outside & terminals for blockages.

Ensure all external controls are operating and are set to normal running. Ensure that a mains electrical supply is available to the unit.

YES

Is the voltage across terminals B1 &

B2 between 80v

& 160v?

Disconnect wires

from terminals

F1, F2 & F3. Ensure voltage selector wire is

correctly engaged.

Check external

Is the voltage

across F1 & B2

between 80v

& 160v?

YES

control wiring.

Refer to 204 wiring

diagram (section 7)

Reconnect wires

to terminals

F1, F2 & F3.

Replace controller

Is there mains

voltage between

F2 and B2

Replace controller

Refer to diagrams below to identify terminals on components (e.g. A1, D3 etc).

YES

Are both fans

operating?

See Fan Fault Finding Chart

YES YES

external controls

have a mains supply

from F2 & reduced

voltage supply

Rectify fault on wiring to

external control

Do the

from F1

YES

Check

external

control,

rectify or

replace

necessary.

IMPORTANT

When investigating overheating allow the unit to run long enough for any fault to become apparent.

Note 1

Electricity supply must be isolated and Fan Motor temperature must be less than 100˚ to allow thermal trip to reset.

Fan

Plug

Controller

Voltage Selector Wire

Fuse

(3.15AT)

160 140 120 100

WHC0037A

Connector

Block

3 2 1

1 2 3

4 5 6

Page 33

11.0 Fault Finding

HR204 - Main Unit Fault Finding Chart

YES

Is there adequate airflow at the appliance

inlets and

outlets

Clean filter &

heat exchanger

(section 9). Check

duct system and

terminals for blockages or

damage. Ensure

terminals are

adjusted correctly.

YES

Do external

controls switch

the unit to boost.

WHC0038A

YES

Unit operating

Replace bulbs

satisfactorily

(Max. 40 watts)

Page 34

Investigate the

cause and rectify.

Fan has overheated.

YES

Is the

2 µF?

approximately

capacitor reading

YES

With

the capacitor

wires at the fan

disconnected is there

between the black & blue

160 - 200 Ohms resistance

YES

G2/G3?

connector

Replace

capacitor

(section 10.4)

Replace fan

(section 10.3)

11.0 Fault Finding

Fan Circuit Fault Finding Chart

WHC0039A

fan?

wires from the

female fan plug.

across male and

Ensure continuity

Replace fan

(section 10.3)

Note 1

Electricity supply must be

IMPORTANT

When investigating

isolated and Fan Motor

temperature must be less than

100˚ to allow thermal trip to

reset.

overheating allow the unit to

run long enough for any fault

to become apparent.

Note 2

Electricity supply must be

isolated and Overheat

temperature must be less

than 80˚ to allow Overheat

Voltage Selector Wire

Controller

123

Thermostat to reset.

160

140

120

100

Fuse

(3.15AT)

Has the fan

thermostat trip

Is the

G2 and G3 on

voltage across

YES

(see note

operated.

80v and

the fan plug between

1).

160v?

Disconnect

the capacitor.

Is there between

the brown & black

350 & 405 Ohms between

Rectify fault.

Is there

continuity across the

For HR205 Model Only

(Ensure the overheat

overhead thermostat?

below 80˚c)

thermostat is

Replace

Overheat

Thermostat

(section 10)

23456

Block

Connector

fan

YES YES

Re-align

Plug

C.Hood

YES

Start

Are fans

free to

rotate?

Is the

on inlet

fan fouling

Replace fan

(section 10.3)

WARNING

If the Overheat sensor or Fan

thermal trip has operated,

check the entire system and

unit for correct installation.

Check all ducting outside &

terminals for blockages.

Fan

Plug

ring?

Page 35

12.0 Short Parts List

FRONT

orm

ost

WHC0023A

Key No. Spares Part No. Description

1 372730 Fan assemb ly c.w. capacitor 2 372731 Capacitor 3 372732 Controller 4 372733 Overheat thermostat 5 372734 Fire damper 6 372735 Inlet duct filter 7 372736 Heat exchanger 8 372737 Heat exchanger seals (4 off) 9 372739 Outer door assembly 10 372741 Cooker hood seal 11 372743 Cooker hood filters (set of two) 12 372748 M5 wing screw 13 372777 Light Cover

Fig. 28

Optional extras 14 370254 Humidity sensor HS6

15 370495 Normal/boost switch NBSW 16 370278 Normal/boost switch PCSW

Page 36

372705C - 0208