Vectaire WHHR Maxi, WHHR Maxi Plus, Midi Lite, WHHR Midi Installation, Operating And Maintenance Instructions

WHHR Maxi & Maxi Plus

Residential Whole House
Heat Recovery Units
with Low Energy EC Motors
Optional - Integral LCD

Installation, Operating and Maintenance

Instructions

Image of model with LCD screen

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"WHHR MAXI & MAXI PLUS" - WHOLE HOUSE HEAT RECOVERY UNIT
INSTALLATION AND OPERATING & MAINTENANCE INSTRUCTIONS

Safety Notice

It is important to read this Instruction Manual carefully before installing or using the product. Following

hese instructions will ensure that your ventilation system is installed, commissioned and used properly and

t
continues to operate effectively. Vectaire will not be held responsible and will not accept liability for any dam­age caused to persons or property through failure to follow the guidance provided in this manual. It should
always be available with the product for easy reference.

WHHR - Maxi: 6"/150mm spigot, for dwellings up to 250m

Maxi Plus: 6"/150mm spigot, for dwellings up to 400m

2

, max capacity 177 litre/sec

2

, max capacity 238 litre/sec

General Information

The Vectaire WHHR Maxi/Maxi Plus heat recovery systems provide
whole house mechanical ventilation to living areas, bedrooms, kitchen

Cooled

outgoing

stale air

Incoming

fresh air

and bathrooms. They extract stale, contaminated air from kitchens, util­ity rooms and bathrooms, and use the heat recovered from this air to
warm fresh, incoming air to create a flow of fresh, filtered air throughout
the dwelling. The extract and intake air streams are separated to avoid
contamination.

The system will operate continuously to create a stable, comfortable,
healthy environment avoiding the use of excessive energy and saving
heat already generated.

The heat recovery unit must be installed vertically, and will generally be
sited in a cupboard. It will be connected by hidden ductwork to vents

Outgoing stale air

sited in the ceilings of the rooms which are to be ventilated. Each unit
is commissioned individually so that the amount of air moved is tailored

Warmed fresh air

to suit the performance required. There will be a facility to boost the
extraction rate when desired (e.g when cooking or bathing, or when pollutant levels rise). This may be done auto­matically or manually.

The system is designed to run continuously and should NOT be switched off except for maintenance or filter
replacement. It is important to follow the advice in this user manual and correctly install and maintain the
system to ensure a healthy and comfortable indoor environment.

Features

• SAP PCDB Listed whole house heat recovery units giving continuous ventilation in the kitchen and up to seven

additional wet rooms (using rigid ducting)

• low noise levels

• variable choice low (trickle) speed and boost options for optimum setting at installation

• boost speed triggered by a switched live connection from:

- a light switch (if more than one light switch is used, each one must be a double pole switch)

- DRH240 (dynamic remote humidistat)

- PIRFF (passive infra red)

- THM (thermostat)

- a remote switch/pull cord
or via LCD control panel

• Can be mounted with left or right hand drainage and ducting

• Economical EC motor with electronic control plus:
Standard control features:

> variable adjustment - trickle and boost speeds set at installation for both motors independently

> boost setting - with integral overrun timer adjustable up to 20 minutes

> optional delay-on-timer - boost speed does not operate if switched off within 2 minutes

> integral frost-stat - proportionately reduces intake motor speed as temperature falls

> purge boost - for rapid air change

> BMS connections - for remote motor shut off

• Installation MUST be carried out by suitably qualified personnel and MUST be in accordance with current IEE

regulations

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nstallation

I
IT IS IMPORTANT THESE INSTRUCTIONS ARE

READ FULLY BEFORE INSTALLATION

This product should not be used for any purpose other

•

than that for which it was designed and as shown

n this leaflet

i

• All packaging should be removed and the unit checked
for damage in transit. If there is any damage, please
contact your supplier

• The WHHRMaxi-C/Maxi Plus must be installed verti­cally, and generally be fitted into a cupboard, loft or
ceiling void.

• In order to comply with Construction (Design & Man-

agement) Regulations, sufficient access for safe
maintenance (recommended on an annual basis), or
removal following installation, MUST be provided for
this product. We recommend that a clearance of
at least 150mm is available on each side of the cab­inet to allow access to the motors. See dimensions
diagram.

• Regulations and current Building Regulations. In order to comply with these, it may be necessary to fit fire

dampers or other similar devices within the associated ductwork.

• Flue gases from fuel-burning equipment must not be drawn into a living area. If any room from which air
is extracted contains a fuel burning appliance, such as a central heating boiler, then its flue must be of the
sealed or balanced flue type, or allowance must be made for an adequate supply of air into the room.

• The unit must NOT be installed:

- where there is excessive oil or grease

- where there are hazardous gasses, liquids or vapours that are flammable or corrosive

- in ambient temperatures above 40ºC or lower than 0ºC

- in areas of excessive humidity or in a wet environment

• Where possible the unit should NOT be installed directly above a bedroom or living room.

• The condensation drain MUST be fitted

• Care should be taken to ensure that ducting is free from blockages

• External grilles should be located a minimum of 600mm from any flue outlet in accordance with all Regulations

• The unit must be connected to a 230-240v, 50Hz single phase electrical supply.

• A triple pole isolation switch with contact separation of at least 3mm must be used to connect the appliance

to the fixed wiring when using the Switched Live.

• The product should only be connected to the mains electricity supply or electrical outlet if:

- your electrical voltage and frequency correspond to those shown on the rating label.

- the capacity of your electricity supply is sufficiently powerful to operate the product at its maximum power.

• If one of the spigots is not connected to ducting a safety grille MUST be fitted to that spigot, so that it is

impossible for any moving part to be touched.

Installation of the appliance MUST be carried out by a qualified and suitably competent person and should be
carried out in clean, dry conditions where dust and humidity are at minimal levels. The unit is not suitable for
installation to the exterior of the dwelling.

Transportation, packaging and storage prior to
installation

• Care should be taken when transporting the unit.

Please be aware that this unit weighs 36 Kg - we
recommend the use of appropriate handling and lift­ ing equipment. Dropping or knocking will damage the
inner workings of the unit.

• The unit should always be stored in a clean, dry

environment.

• Remove all packaging before installation.

Pre-inspection

• Inspect the unit and electrical supply cord for any

damage (damage must be repaired by a suitably
qualified and competent person.)

• Check all parts are supplied as shown.

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Parts list

1 x Vectaire WHHR Maxi or maxi-Plus unit.

2 x Wall mounting brackets.
1 x Installation, Operation & Maintenance

Instructions
Any parts shortages or faults must be reported to the
supplier immediately.

Installation - mounting - Duct and Duct Connections

(refer to design drawing)

• 4 x 150mm nominal diameter spigots are provided for

the connection of ducting.
for correct connection of the supply and exhaust ducts.

NB. ductwork installer should mark the "as installed"
tick box on the label on the top of the unit to show whether it is left or right handed.

These are clearly marked

1. Mark a horizontal line on the wall using a spirit level.
This line will be approximately 60mm below the loc­ ation of the top face of the unit when fitted (exclud­ ing duct ports). Use the mounting bracket as a
template to mark the fixing hole centres.

3. Fix the upper mounting bracket to the wall ensuring
the interlocking side is at the top, as shown

2. Drill the holes and fit wall plugs. (Note: if the unit is
not being mounted on a solid wall, ensure that
appropriate fixings are used.)

4. Mark a horizontal line on the wall 315mm below
the hole centres for the upper bracket. Repeat
steps 2 and 3 for the lower bracket.

5. Mount the unit by locating the brackets on the back
of the unit securely over the wall brackets.

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7. Condensation

• (The unit may sometimes produce condensation which must be
drained away. A 21.5/22mm dia pipe outlet is provided on this unit).

Note: optional left or right hand drain connectors (21.5/22mm) are fit-

ed. A drainage pipe must be connected to the appropriate side, dependent

t
on the positions of the supply and extract ducting. Refer to figs A and B.

•

If the ducting is installed as shown in Fig A, the drain must be connected to
the left-hand outlet. If the ducting is installed as shown in Fig. B, the drain
must be connected to the right-hand outlet. The unused drain outlet must
be capped off.

• The drainage pipe must be installed with a continuous fall from the cabinet

to the external household drainage point and a wet or dry trap must be fitted to prevent return air penetration.

• If any part of the condensate drain pipe passes through an unheated space, it must be insulated with the equiv­alent of at least 25mm of insulating material with a thermal conductivity of 0.04 W/mK.

• Where ducting is installed in an unheated
space, all of the ducts should be insulated.
Where ducting is installed in a heated
space, only the cold ducts should be insu­lated. i.e. the supply duct from outside and
the extract duct from the unit to the outside.

• The duct layout must be designed to suit the
requirements of the ventilation/heat
recovery system and building layout.

• Where rigid duct is used, it should be installed
using the least number of fittings to minimise
air flow resistance. Where possible, final con-

A

B

nection to the grilles and unit should be made
with a flexible connection.

• Where flexible ducts are used, ensure that:

lengths of ducting are no longer than

-

300mm in any one place

- the duct is stretched so that it is smooth

and straight

- where bends are necessary, they have

large radii (ie avoid sharp bends)

- the duct is not crushed if in a restricted area

• Where ducting passes through a fire partition, suitable fire dampers must be installed to prevent the transmission

of fire through the duct.

Electrical Connection

WARNING: these appliances must be earthed and all wiring must conform to current IEE Regulations and all ap­plicable standards and Building Regulations.

• The unit is suitable for 230V, 50Hz Single phase supply.

• The unit is supplied with:

- A mains rated 4 core flexible cord (black, brown, grey and green/yellow) and 2 core 0-10v cables for purge
switching, or an external connector box.
Cables for any other external device will be provided and labelled on request

• A triple pole isolation switch with contact separation of at least 3mm must be used to connect the appliance to the

fixed wiring when using the Switched Live.

• Boost controls must not be located within 1 metre of a cooker or where they may be affected by excessive heat or

moisture.

• Boost and other external controls should be clearly identified and conveniently located.

• The boost facility can be activated by a switched live connection (in addition to the permanent supply live). The switched

live can be operated by a variety of external devices, including:

- PIRFF (passive infra red)*

- DRH240 (dynamic remote humidistat)*

- THM (thermostat)*

- a light switch (if more than one light switch is used, each one must be a double pole switch)

- a remote switch/pull cord
or via LCD control
(*PIRFF, DRH240 and THM may have integral over-run timer which controls the length of time that the fan will
continue to operate at its boost speed after the boost has been switched off.)

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Commissioning

1. The commissioning must only be carried
out by a suitably qualified person.

. Prior to starting the commissioning pro-

2

cedure, ensure that the ductwork connec­tions and airflow directions match one of
the options A or B, shown on page 5.
Check that the drain connection is on the
correct side.

3. Before making any adjustments, ensure
that the air valves or grilles are fully open.

4. Please see separate "LCD Control Panel
Commissioning Instructions" for details
on commissioning and user operations.

WARNING : With the control board panel
removed, 230 volt live connections are
accessible.

Cleaning and Maintenance

WARNING: The unit uses a 230V supply and contains rotating mechanical parts.

Before carrying out any maintenance or cleaning operations the mains electrical supply MUST be discon­nected.

The heat exchanger within the unit should be cleaned annually.

To clean the filters and heat exchanger:

The air filters and heat exchanger of the Vectaire WHHR Maxi/Maxi Plus should be cleaned regularly by a suitably
qualified person (the frequency of cleaning will vary depending on the installation environment).

Filters:

• Slide out the filters by pulling out the tabs.

• Clean the filters carefully using a vacuum cleaner, replace in the

slots and refit the filter covers

Heat Exchanger:

• Firstly remove filters as described above

• Remove the screws securing the front panel and carefully lift off.

Using the plastic strap fitted, carefully pull out the heat exchanger

• Caution: if this is done during cold weather, the heat exchanger
may contain water. It is advisable to have a plastic bowl available to
avoid spillage.

• Lightly clean the faces of the heat exchanger with a vacuum
cleaner. Replace the heat exchanger carefully, by sliding the
assembly back into the cabinet.

• Replace the front cover by hooking the top edge into the slots in the cabinet and secure in place using the
screws.

• Finally, replace the filters as above.

Never use water or any other fluids to clean the heat exchanger

Filter Replacement

Filters should be replaced annually or after a maximum of 3 cleaning cycles.
Replacement filters are available from Vectaire - call us on [phone] or email to [e-mail]

WHHR Maxi/Maxi Plus /LCD110718

Vectaire Ltd, Lincoln Road, Cressex Business Park, High Wycombe, Buckinghamshire, HP12 3RH

Tel: [phone]. Fax: [phone]. Email: [e-mail]

E & O.E