Vent-Axia 45 90 49 (Pullcord), 45 90 50 (Timer), 45 90 51 (Humidistat), LoWatt Series, LoWatt U/KT Installation And Wiring Instructions

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Installation and Wiring Instructions

WC & BATHROOM FAN

Stock Ref. N°
45 90 49 (Pullcord)
45 90 50 (Timer)
45 90 51 (Humidistat)

2

[A]

[B]

[D]

[C]

[E]

Window

Kit

[G]

[F]

[F]

Wall Kit

Installation and Wiring Instructions for the LoWatt WC and Bathroom Extract Fan.

IMPORTANT:
READ THESE INSTRUCTIONS BEFORE COMMENCING THE INSTALLATION

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.

• Ambient temperatures higher than 40°C or less than –5°C.

• Possible obstructions which would hinder the access or removal of the Fan.

• Sudden ductwork bends or transformations close to the Fan.

SAFETY AND GUIDANCE NOTES

A. All wiring to be in accordance with the current I.E.E. Regulations, or the appropriate standards of your country

and MUST be installed by a suitably qualified person.
B. The Fan should be provided with a local double pole isolator switch having a contact separation of at least 3mm.
C. Ensure that the mains supply (Voltage, Frequency, and Phase) complies with the rating label.
D. The Fan should only be used in conjunction with the appropriate Vent-Axia products.
E. It is recommended that the connection to the fan connecter terminals is made with flexible cable.
F. When the Fan is used to remove air from a room containing a fuel-burning appliance, ensure that the air

replacement is adequate for both the fan and the fuel-burning appliance.

G. The Fan should not be used where it is liable to be subject to direct water spray for prolonged periods of time.
H. Where ducted Fans are used to handle moisture-laden air, a condensation trap should be fitted. Horizontal

ducts should be arranged to slope slightly downwards away from the Fan.

I. This appliance is not intended for use by young children or infirm persons without supervision.
J. Young children should be supervised to ensure that they do not play with the appliance.

DESCRIPTION

The LoWatt WC & Bathroom Fan is suitable for Panel mounting either in a horizontal or vertical plane as standard;
both Window (25 41 01) and Wall (25 41 02 White / 25 41 00 Brown) Kits are available to suit these options.

[A] Indoor Grille.
[B] Inner Cover.
[C] Cable Grommet.
[D] Base Housing.
[E] Telescopic Wall Liner.
[F] Outside Grille.
[G] Spacers.

3

FIXING HOLES

A INSTALLATION.

PANEL MOUNTING

1. Cut a 105mm∅ hole through the panel.

2. Remove the Indoor Grille [A]. Insert a small bladed screwdriver into the slot at the base of the Grille, push the

release catch in and gently lever the Grille upwards away from the Inner Cover [B].

3. Remove Inner Cover [B]. Insert a small bladed screwdriver into the slot on the sides of the Cover, push the

release catch in and gently lever the cover away from the Base Housing [D].

4. Remove the Cable Grommet [C], pierce/cut a hole in the Grommet to suit the cable size, maintaining the

integrity of the seal and replace the grommet in the Base Housing to suit either a top or back cable entry.

5. Slide the Base Housing into the hole in the panel and secure into position using screws and fixings provided.

Fig. 1.

6. Ensure the fan blade rotates freely.

7. Select and follow the appropriate wiring diagram in Section B WIRING.

8. Replace the Inner Cover and Indoor Grille.

9. Switch the mains power supply on and check the fan is operating correctly.

WALL MOUNTING

1. Cut a 115mm. ∅ hole through the wall and insert the wall sleeve with the larger diameter sleeve on the room

side and cement both ends into position flush with the wall faces. The wall sleeve should be angled downwards
away from the fan to allow any condensation to drain to the outside wall.

2. Using the Back Plate as a template, mark the fixing hole centres on the wall. Drill and plug the wall and fix the

Back Plate into position.

3. Fix the Outside Grille [F] on to the Back Plate (screws provided). Ensure the louvres are pointing downwards.

4. Remove the Indoor Grille [A]. Insert a small bladed screwdriver into the slot at the base of the Grille, push the

release catch in and gently lever the Grille upwards away from the Inner Cover [B].

5. Remove Inner Cover [B]. Insert a small bladed screwdriver into the slot on the sides of the Cover, push the

release catch in and gently lever the cover away from the Base Housing [D].

6. Remove the Cable Grommet [C], pierce/cut a hole in the Grommet to suit the cable size, maintaining the

integrity of the seal and replace the grommet in the Base Housing to suit either a top or back cable entry.

7. Slide the Base Housing into the Wall Liner and secure into position using screws and fixings provided (Fig. 1.).

8. Ensure the fan blade rotates freely.

9. Select and follow the appropriate wiring diagram in Section B WIRING.

10. Replace the Inner Cover and Indoor Grille.

11. Switch the mains power supply on and check the fan is operating correctly.

WINDOW MOUNTING

1. Cut a 105mm ∅ hole in the glass.

2. Ensure that the glass surfaces are clean and free from grease.

3. Remove the Indoor Grille [A]. Insert a small bladed screwdriver into the slot at the base of the Grille, push the

release catch in and gently lever the Grille upwards away from the Inner Cover [B].

4. Remove Inner Cover [B]. Insert a small bladed screwdriver into the slot on the sides of the Cover, push the

release catch in and gently lever the cover away from the Base Housing [D].

5. Remove the Cable Grommet [C], pierce/cut a hole in the Grommet to suit the cable size, maintaining the

integrity of the seal and replace the grommet in the Base Housing to suit a top cable entry.

6. Fit required spacers behind the fan back plate, engaging the locating pips. Place the fan spigot through the hole

in the glass from the inside, with a gasket on each side of the glass.

7. From the outside, place on the remaining spacer, with the locating pips facing outwards. For double-glazing and

materials up to 40mm thick, one or more spacers may be discarded.

8. Draw the assembly together with the threaded fixing ring. Do not over-tighten.

9. Fix the Outside Grille [F] on to the Spacer (screws provided). Ensure the louvres are pointing downwards.

10. Ensure the fan blade rotates freely.

11. Select and follow the appropriate wiring diagram in Section B WIRING.

12. Replace the Inner Cover and Indoor Grille.

13. Switch the mains power supply on and check the fan is operating correctly

4

~
N

L

1 Phase Supply

(220-240V 50Hz).

FUSE

Switched

Fused Spur

+

LN

8V 11V

-ve

Controller

-

Fan

SELV Supply

Pullcord

Lower Speed

for Toilet

Higher Speed for

Bathroom

Bath/Utility Room

Ls

~N

Switch

Toilet

SELV Supply

NL

+ve -ve

+

-

Fan

Select Bath/Utillity (High Speed)

or Toilet (Low Speed) using the

selector switch

mins

Timer Adjuster.

Control Timer

B. WIRING.

WARNING: THE FAN AND ANCILLARY CONTROL EQUIPMENT MUST BE ISOLATED FROM
THE POWER SUPPLY DURING THE INSTALLATION / OR MAINTENANCE.

NOTE: The Controller MUST be surface mounted to allow air to freely circulate around the unit. When

installed in a loft void it MUST NOT be enclosed or covered with insulation.

1. Select and follow the appropriate wiring diagram (Fig. 2-5).

2. Check all connections have been made correctly and ensure all terminal connections and cable clamps are

securely fastened.

3. The cable entry must be made using the cable grommet.

4. Ensure the impeller rotates and is free from obstructions.

Fig. 2.

LoWatt WCBP
(45 90 49) Pullcord Model.

Select the wiring configuration required for the Toilet or Bathroom.

Fig. 3.

LoWatt WCBT
(45 90 50) Timer Model.

Switch the selector switch to the required mode.

Timer Adjustment.

The overrun time period is factory set to 15 minutes. The overrun time period may be adjusted from 5-25 minutes,
by altering the adjuster on the back of the Control Timer.

Before adjusting the timer, switch off the Mains Supply.

1. Remove the Controller Unit.

2. To REDUCE the operating time, turn the adjuster ANTI-CLOCKWISE on the back of the Controller.

3. To INCREASE the operating time, turn the adjuster CLOCKWISE on the back of the Controller.

4. Replace the front of the Control Timer.

5. Reconnect the mains supply.

5

~
N

L

1 Phase Supply

(220-240V 50Hz).

FUSE

Switched

Fused Spur

+

LN

8V 11V

-ve

Controller

-

Fan

SELV Supply

12

Ambient Response

Humidity Sensor

(56 35 52)

53

4

~
N

L

1 Phase Supply

(220-240V 50Hz).

FUSE

Switched

Fused Spur

+

LN

8V 11V

-ve

Controller

-

Fan

SELV Supply

Ambient Response

Humidity Sensor

(56 35 52)

53

4

12

Fig. 4.

LoWatt WCBH
(45 90 51) Toilet Humidity Controlled Model.

Fig. 5.

LoWatt WCBH
(45 90 51) Bathroom/Utility Humidity Controlled Model.

C. SERVICING AND MAINTENANCE.

WARNING: THE FAN AND ANCILLARY CONTROL EQUIPMENT MUST BE ISOLATED

FROM THE POWER SUPPLY DURING MAINTENANCE.

1. At intervals appropriate to the installation, the fan should be inspected and cleaned to ensure there is no build

up of dirt or other deposits.

2. Remove the Indoor Grille (See Section A : 2 for instructions) and wash in warm soapy water.

3. Wipe the shutter blades with a damp cloth until clean.

4. Replace the Grille.

The LoWatt fan has sealed for life bearings, which do not require lubrication.

6

Head Office: Fleming Way, Crawley, West Sussex RH10 9YX

Tel: [phone] Fax: [phone]

Internet site at: www.vent-axia.com

VENT-AXIA SALES CENTRES

ENGLAND & WALES NATIONAL CALL CENTRE SCOTLAND

Newton Road, Crawley
West Sussex Telephone: [phone]
RH10 9JA Fax: [phone]

Telephone: [phone] REPUBLIC OF IRELAND
Fax: [phone] Vent-Axia Ventilation Ltd.
921 Western Road Industrial Estate
NORTHERN IRELAND Naas Road, Dublin 12.

Telephone: [phone] Telephone: [phone]
Fax: [phone] Fax: [phone]

Did you find these instructions easy to use?

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The Vent-Axia Guarantee

Applicable only to products installed and used in the United Kingdom. For details of the Guarantee outside of the United
Kingdom contact your local supplier.

Vent-Axia guarantees this product for five years from the date of purchase against faulty material or workmanship. In the
event of any part being found to be defective, the product will be repaired, or at the Company’s discretion the product will
be replaced without charge, provided that the product:

1). Has been installed and used in accordance with the instruction given with each unit.

2). The electricity supply complies with the rating label.

3). Has not been misused, neglected or damaged.

4). Has not been modified or repaired by any person not authorised to do so by Vent-Axia.

IF CLAIMING UNDER THE TERMS OF THE GUARANTEE

Please return the complete product, carriage paid to your original supplier by post or in person. Please ensure that it is
adequately packed and accompanied by a letter clearly marked ‘Guarantee Claim’ stating the nature of the fault and
providing proof of the date and source of purchase.

As part of the policy of continuous product improvement Vent-Axia reserve the right to alter specifications without notice

45 90 90 C 1103