Vectaire WHHR125DC Assembly instructions

FEATURES
• Highly efficient, low energy
solution to condensation
and pollutant control
• Continuous ventilation in
kitchen plus up to
5 additional wet rooms
• Over 90% heat exchange
efficiency
• Low noise levels
• Building Regulations Part L
and Part F compliant
LOFT OR WALL INSTALLATION
WHHR125DC
SAP Q Eligible
WHOLE HOUSE HEAT RECOVERY UNIT
GENERAL
•SAP Q eligible whole house heat
recovery unit for homes
•continuous ventilation in kitchen and up
to 5 additional wet rooms - optimum
use in kitchen plus 2 wetrooms
•maximum airflow 165m3/hr
•suitable for areas up to 115m2
•up to 91% of heat is recovered from
air extracted from warm, moist rooms
to create a stable, comfortable,
healthy environment
•easy to install with quick fix mounting
bracket
•for fitting into lofts, false ceilings
or cupboards
•multiple choice low (trickle) speed and
boost options
•boost speed obtainable by user via
remote switch/pull cord (ie a volt free
contact switch - not supplied) or by a
humidistat, thermostat, or PIR sensor
using an intermediate, external relay
(available separately)
•has integral over-run timer for boost
speed
•frost protection
•low noise levels
•low running costs
•gives extra security by removing
need to open windows
•guaranteed for 3 years
•Vectaire Ltd can supply all accessories
for use with these units, including duct-
ing and metal filters, outside grilles and
wall cowls
SPECIFICATION
• very compact, low profile unit
•housing from Zintec sheet steel pow-
der coated white
•expanded polypropylene (EPP) heat
exchanger
•closed cell foamed Nitrile rubber insula-
tion - class "O" fire rating
•grade G3 synthetic filters, flame resist
ant to BS5588
•can be used with 100mm or 125mm
dia ducting without needing adaptors
•operates in temperature up to 40ºC
•weight - 16kg
COMPLIES WITH
•Part L of Building Regulations for
enhanced energy saving capability
•Part F of Building Regulations for
reliable, efficient ventilation
•EU RoHS Directive Compliant.
•Conforms to requirements of EC
Council directives relating to
Electromagnetic Compatibility and
Electrical Safety: 2006/95/EC (LVD),
2004/108/EC (EMC)EN 60335-
1:2002/A2:2006, EN 60335-2-
80:2003/A1:2004.
•CE marked
•SAP Q eligible
• EST Best Practice Compliant
Incoming fresh air
Warmed fresh air
Extracted warm, moist, stale air
Cooled outgoing stale air
WHHR125DC
GENERAL COMPLIES WITHSPECIFICATION

Vectaire Ltd
Lincoln Road
Cressex Business Park
High Wycombe
Buckinghamshire
HP12 3RH
Tel: [phone]
Fax: [phone]
Email: [email protected]
Web: www.vectaire.co.uk
Vectaire Ltd reserves the right to alter specifications as part of its policy of continuous development Apr 2011/WHHR125DC© E & O.E
WHHR125DC - TECHNICAL INFORMATION
300
250
200
150
100
50
0
Static Pressure Pa
Speed & Watts
Max
Speed 78
759
635
527
421
316
213
18
DIMENSIONS - mm
ENERGY LEVEL PERFORMANCE - using rigid ducting
Exhaust Terminal
Configuration Fan Speed Setting Specific Fan Power (W/l/s)
Heat Exchange
Efficiency (%)
Energy Saving Trust
Best Practice
Performance Compliant
Kitchen + 1additional wet
room 100% variable 0.70 91 yes
Kitchen + 2additional wet
rooms 100% variable 0.70 89 yes
Kitchen + 3additional wet
rooms 100% variable 0.72 89 yes
Kitchen + 4additional wet
rooms 100% variable 0.90 88 yes
Kitchen + 5additional wet
rooms 100% variable 0.99 87 yes
Figures from BRE test results
0 10203040506070l/s
20 40 60 80 100 120 140 160 180 200 220 240 m3/hr
PERFORMANCE

It is important to read this Instruction Manual carefully before installing or using
the product. Following these instructions will ensure that your ventilation system
is installed, commissioned and used properly and continues to operate effectively
"WHHR125DC"
Whole House
Heat Recovery Unit
with Low Energy DC Motor
Installation, Operating and Maintenance
Instructions - domestic and commercial use

Page 2
Contents
Section Page Number
Introduction 3
How the system works - Features 4
Installation
- Safety & Guidance 5
- Dimensions 5
- Pre-installation inspection 6
- Mounting 6, 7
- Drain assembly 8
- Ducting 9
- Electrical connections 10
- Wiring diagram 10
Commissioning
- Quick commissioning mode 11
- Full commissioning mode for optimum efficiency 12
- Boost speed setting 13
- Resetting the controller 13
Service and Maintenance 14
- Cleaning 15
- Filter replacement 15
Service record 16

Interior comfort, air quality and energy efficiency are vitally important considerations in buildings today.
Controlled ventilation is even more vital in virtually airtight modern homes.
The Vectaire WHHR125DC has been developed to meet these demands by providing clean fresh air
whilst extracting stale polluted air from the building using state of the art technology to maximise
energy efficiency.
For the home owner or occupant, this Instruction Manual explains:
• How your Vectaire WHHR125DC system works.
• How to operate and maintain your Vectaire WHHR125DC.
For the professional installer, this Instruction Manual explains:
• How to install the Vectaire WHHR125DC.
• How to commission the unit.
• How to maintain the unit.
Safety Notice
It is important to read this Instruction Manual carefully before installing or using the product.
Following these instructions will ensure that your ventilation system is installed, commissioned and
used properly and with the correct maintenance procedures 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 avail-
able with the product for easy reference.
This unit SHOULD NOT be switched off. It is designed to run continuously. If it is switched off indoor
pollutant and moisture levels may increase.
Page 3
Introduction

The Vectaire WHHR125DC works by extracting stale polluted air from rooms where most moisture is
generated and providing fresh pre-warmed air taken from outside the house and delivering it to other
rooms, creating a flow of fresh, clean air throughout the house.
Most of the heat reclaimed from the extracted air is used to pre-heat incoming fresh air by means of a
“heat exchanger” built into the unit. The ventilation system operates continuously so the air remains free
from harmful pollutants and excessive moisture, but without wasting heat or energy unnecessarily.
The unit is usually installed in a roof space or cupboard and the air travels from terminals built into the
ceiling which are connected by hidden ducts to the unit. These ceiling terminals should not be disturbed
or adjusted - they have been set at installation to give the correct amount of ventilation to the property.
Each unit is commissioned individually so the amount of air moved is set to suit the specific size and style
of the house. Most systems will also have a facility to boost the extraction rate at times when more
moisture is being generated, such as when bathing or cooking.
During cold weather the frost protection programme will automatically vary the ventilation to ensure
there is no build up of ice in the unit. There is an optional summer mode over ride switch which enables
the unit to operate on extract only mode (ie there is no incoming air). If the unit is operating this way
and the building is occupied, it is advisable to open either windows or trickle ventilators to ensure a prop-
er balance of air. (Windows and ventilators should NOT be open when operating as a heat recovery unit).
There may be small changes in airflow or noise levels. This is quite normal - the unit is designed to oper-
ate in this way. The system will have been pre-set to run continuously to providenormal ventilation. If a
boost switch has been installed, it can be used to increase the extract ventilation rate at times when
moisture or pollutant levels are considered excessive. You may have electronic sensors which detect
high levels of moisture and pollutants which boost the system automatically.
All whole house ventilation units require periodic maintenance and this must only be carried out
by a suitably qualified and competent person. See the servicing and maintenance section for
further details.
Features of the Vectaire WHHR125DC
• Easy installation mounting bracket.
• Standard 15mm fitting for condensate drain connection.
• The duct ports accept 100 and 125mm diameter ducting.
• Quick commissioning with step-less fan speeds
• 3 speed options - Continuous, Boost and Setback
• Advanced frost protection control.
• The boost speed can be triggered by:
- a remote switch/pull cord (a volt free contact switch)
(not supplied)
OR by any of the following when used with an intermediate,
external relay (available separately - please contact Vectaire
Technical Dept for further information on the use of this):
- 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)
• Accurate system balancing through the indepenent adjust
ment of the supply and exract fans.
• Manual Summer Mode enables extract only mode thus reducing
the supply of warmer outside air to the dwelling to maintain a
cooler internal temperature.
Page 4
How the system works
System Layout 1
System Layout 2

IMPORTANT: READ THESE INSTRUCTIONS FULLY
BEFORE INSTALLING THIS
APPLIANCE!
The Vectaire WHHR125DC is designed to be fitted into the
roof space or a cupboard. These diagrams show the dimen-
sions of the unit and the additional space required around the
unit to allow for future servicing and maintenance.
The unit must NOT be installed in an area which does not
have sufficient access for future maintenance.
The appliance must NOT be installed in an environment which
contains:
• Excessive oil or a grease laden environment.
• Hazardous gases, liquids or vapours that are
flammable or corrosive.
• Ambient temperatures above 40°C or below -5°C.
• Humidity levels above 90% or a wet environment.
Safety and guidance
• The electrical installation of the appliance MUST be car-
ried out by a suitably qualified, competent person and all
wiring must be in accordance with current I.E.E.
Regulations and all appropriate standards and applicable
regulatory guidance.
• The appliance must be connected to a local isolation
switch with a contact separation of at least 3mm.
• The appliance is suitable for 230V ~ 50/60Hz single
phase with a fuse rating of 3A.
• The condensation drain MUST be fitted and insulated with
the equivalent of at least 25mm of insulating material
with a thermal conductivity of 0.04 W/(mK).
• Ensure that external grills are located away from any flue outlet, in accordance with all relevant
Building Regulations.
• Always ensure ducting is free from blockages before switching the unit on as this may invalidate your
guarantee.
• Precautions must be taken to avoid the back-flow of gases into the room from an open gas flue
or other fuel-burning appliances.
• We recommend a minimum distance of 2m between the external air supply inlet and the extract
air outlet to prevent cross contamination and a minimum distance of 200mm between the appliance
and any sharp bends in duct work.
• The appliance is not suitable for installation to the exterior of the dwelling.
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. It should
only be installed after other building works have been completed and the building in which it is installed cleaned.
Failure to comply with any of the above points will have an impact on the validity of the guarantee.
Page 5
Installation
Dimensions

Transportation, packaging and storage prior to installation
• Great care should be taken when transporting the appliance, DO NOT drop as damage may
occur within the appliance.
• The unit must always be stored in a clean, dry environment.
• Remove all packaging before installation.
Pre-inspection
• Inspect the appliance and electrical supply cord for any damage.
• Check all accessories have been supplied.
• Inspect the appliance and supply cord for any damage. Any damage must be repaired by a
suitably qualified and competent person.
Parts list
Installation - mounting
Do not remove the transport bungs until connecting ductng.
Transport bungs are fitted to prevent debris falling into the
unit and causing blockages and damage.
The Unit Must be mounted Plumb/Level Front to Back
and Side to Side.
1. Mark a horizontal line on the wall using a spirit level. This
line will be approximately 95mm below the location of the
top face of the unit when fitted (excluding duct ports).
2. Use one of the mounting brackets as a template to mark
the three fixing hole centres.
3. Drill holes for fixings, always use a fixing suited to the wall
type.
4. Mount one fixing bracket to the wall ensuring the inter-
locking side is at the top, as shown
Page 6
Installation
1 x Vectaire WHHR125DC unit.
2 x Wall mounting brackets.
1 x Safety bracket.
1 x 15mm Drain connector.
4 x M6x10mm pan head screws.
4 x M6 washers.
Any parts shortages or faults must be reported
to the supplier immediately.

5. Fix the remaining bracket to the unit using the M6
screws and washers provided, ensuring the interlock
side is at the bottom. Do not overtighten.
6. Mount the unit by locating the two mounting brackets
together. Ensure a positive location is made between the
two mounting brackets.
7. Fix the lower safety bracket as shown using the remain-
ing M6 screw, washer and suitable wall fixing.
Hook onto wall bracket.
This bracket MUST be fitted to secure the unit.
Packing to be used as required behind the Safety
Bracket to ensure Unit is level.
Page 7
Installation

A drain must be connected to allow condensation to be
removed from the unit.
The drain connection is made via the 15mm connection on
the base of the unit.
The drain must discharge into the household drainage
system via a U-bend, which must act as an air lock.
1. Attach a 15mm condensate pipe using a
compression fitting (drain pipe shown uninsulated
for clarity).
If any part of the Condensate drain is in 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).
IMPORTANT NOTE: The drain must incorporate a U-bend
to prevent air penetration.
Page 8
Installation - Drain Assembly

Transport bungs are fitted to prevent debris falling into the
unit and causing damage. Premature removal of the trans-
port bungs may invalidate the guarantee.
1. When the ducting has been installed and you are
ready to connect the unit, remove the transport
bungs from the duct ports. (This should be AFTER the
premises has been cleaned).
2. 125mm ducting fits to the outer of the duct ports as
shown.
3. 100mm ducting fits to the inner of the duct ports as
shown.
Ducting best practice
• Ensure ducting is fitted to the correct ports
• The use of flexible ducting must be kept to a minimum
and it should always be pulled taut.
• A minimum distance of 200mm between the unit and a
sharp bend in duct work is recommended.
• Fire Dampers MUST BE FITTED to duct work at appro-
priate locations in accordance with Building Regulations.
• Ducting must be installed in such a way that resistance
to airflow is minimised.
• Ducting terminals for "From atmosphere" and "To atmos
phere" must be to the external air outside the building
envelope.
• Inlet and Exhaust ducts should be separated to ensure there is no cross contamination of air (a mini
mum of 2m is recommended).
• Ducting in unheated spaces must always be insulated to prevent condensation forming within the
ducting.
• All ducting joints including those to the unit’s duct ports must be permanently sealed with ducting
tape and/or silicone type sealant.
• A ducting condensate drain must be fitted to the "To atmosphere" duct work.
Page 9
Installation - Ducting

WARNING: The unit MUST be earthed. All wiring
must conform to current I.E.E. Wiring
Regulations and all applicable standards and
Building Regulations.
• The unit is suitable for 230V~50/60Hz Single
phase supply fused at 3A.
• The unit is supplied with a mains rated 3 core
flexible cord (PVC sheathed, brown, blue and
green/yellow 0.75mm2).
• A double pole isolation switch with contact
separation of at least 3mm must be used to connect the appliance to the fixed wiring.
• Summer mode should not be connected in dwellings where open flued combustion appliances are
used.
• Control switches:
- must not be located within 1 metre of a cooker or where they may be affected by excessive
heat or moisture
- should be clearly identified and conveniently located
• The volt free boost, summer and setback switch wiring:
- must not be connected to the mains supply.
- to be connected to the control board (which is located under the access panel on the top of the
unit).
- wiring cable access is via cable glands which are suitable for 3-6mm diameter cable.
- the boost overrun can be triggered by any device which provides a volt-free, one-way switch.
• Ensure all cable glands are tightened.
• The volt free boost switch wiring to be made by the ‘Boost Switch’ terminals on the control board.
• The volt free setback switch wiring connection to be made by the ‘Setback Switch’ terminals on the
control board.
• The volt free summer mode switch wiring connection to be made by the ‘Thermostat Switch’
terminals on the control board
Do not connect any mains voltage wiring to any terminal on the circuit board.
Page 10
Installation - Wiring
Supply Wiring Diagram
Volt-free setback switching of MVHR
controller PCB using single-pole latching
switch and /or volt-free normally open relay
contacts.
There is no limit to the number of single pole
latching switches or normally open relay con-
tacts used.
To avoid the unit being inadvertently
left in Setback mode. It is recommended
that only one latching switch
is fitted.
Setback switching and connection

Page 11
Installation - Wiring cont
Volt-free boost switching of MVHR
controller PCB using single-pole
momentary switches and/or humidistat
providing single-pole volt-free switching.
There is no limit to the number of
single pole momentary switches or
humidistats used (not supplied).
Boost switching and connection
SWITCH POSITIONS
1. Setback Speed
2. Continous Speed
3. Boost Speed
3 position rotary switch

Page 12
Controls
The speed of the WHHR125DC will require adjustment to ensure the flow rates achieved provide ade-
quate ventilation in accordance with all relevant Building Regulations and applicable Standards. The
WHHR125DC has 3 fan speed settings - Continuous, Boost and Setback.
The Continuous and Boost speeds are selected by placing the controller into Program mode via the
Program/Run switch and changing the position of rotary potentiometers. The setback speed is set
automatically, dependant on the Continuous Speed selected, at roughly half of the selected Continuous
Speed.
All potentiometers
• MIN position is found by turning potentiometers fully anticlockwise.
• MAX position is 300° clockwise from the MIN position.
Prior to the first commission, set Continuous potentiometers to minimum and Boost potentiometers
to maximum or reset. For procedure see page 13.
Control Parameters
• The boost speed cannot be set lower than the continuous speed.
• The continuous speed cannot be set higher than the boost speed.
• All switching inputs are disabled when the Program/Run switch is in ‘Cont’ or ‘Boost’ positions.
• Speed control potentiometers are disabled when the Program/Run switch is in centre Run posi
tion.
Prior to the first commission, set Continuous potentiometers to minimum and Boost potentiometers
to maximum or reset the controller.
Continuous Supply and Extract Speeds
1. Move Program/Run switch to ‘Cont’ position
2. Rotate supply fan continuous speed adjustment potentiometer to achieve required supply contin-
uous air flow
3. Rotate extract fan continuous speed adjustment potentiometer to achieve required extract contin-
uous air flow
4. Return Program/Run to centre position to exit commissioning;
Commissioning
Control identification

Page 13
Boost Supply & Extract Speeds
1. Move Program/ Run swich to ‘Boost’ position
2. Rotate supply fan boost speed adjustment potentiometer to achieve require supply boost air flow
3. Rotate extract fan boost speed adjustment potentiometer to achieve required extract boost air
flow
4. Return Program/Run to centre position to exit commissioning
Boost Overrun Timer
Rotate overrun timer speed adjustment potentiometer to achieve required timer, Adjustment range is
zero to sixty minutes. This setting can adjusted at any time.
Setback speed
Setback speed is automatically set at the mid point between minimum possible continuous speed and
the selected continuous speed.
Summer Mode
Activating Summer Mode turns off the fan that supplies air to dwelling.
Controller Reset
Following a controller reset the ventilation system will need to be commissioned
The procedure to reset the WHHR125DC controller is a simple eight step operation as follows
1. Rotate Supply Continuous speed potentiometer fully anti-clockwise
2. Rotate Supply Boost speed potentiometer fully clockwise
3. Rotate Extract Continuous speed potentiometer fully anti-clockwise
4. Rotate Extract Boost speed potentiometer fully clockwise
5. Move Run/Program switch from the Run position to the ‘Cont’ position
6. Move Run/Program switch from the ‘Cont’ position back to the Run position
7. Move Run/Program switch from the Run position to the ‘Boost’ position
8. Move Run/Program switch from the ‘Boost’ position back to the Run position
Controller reset is now complete
Commission cont

WARNING: The unit uses a 230V ~supply and contains rotating mechanical parts.
ISOLATE the unit from mains power supply and allow sufficient time for all moving parts to
stop before undergoing any Servicing or Maintenance.
All ventilation units require periodic maintenance. The air filters and heat exchanger of the Vectaire
WHHR125DC should be cleaned regularly by a suitably qualified person (the frequency of cleaning will
vary depending on the installation environment). Filters should be replaced after a maximum of 3
cleaning cycles.
Filter and Heat Exchanger access:
1. Loosen the two corner screws located on the bottom
front of the unit.
2. Remove the centre screw.
3. Completely remove the front cover by pulling it away from
the unit at the bottom and lifting.
Page 14
Servicing & Maintenance

Cleaning
To clean the filters and heat exchanger:
1. Remove the front cover (see page 14).
2. Slide out the filters that are fitted either side
of the heat exchanger as shown.
3. Clean the filters carefully using a vacuum
cleaner.
4. Carefully remove any dust from the face of the
heat exchanger using a vacuum cleaner.
Never use water or any other fluids to clean
the heat exchanger.
5. Return the heat exchanger and filters to their
original position.
6. Replace the front cover and ensure it is
securely located at the top before tightening
all screws.
7. Power to the unit can now be restored.
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 via
[email protected]
Condensate Tray
This should be checked to ensure that it is not split. If it is a replacement must be ordered and fitted.
After servicing, always complete the service record on page 16.
Page 15
Servicing & Maintenance cont

Vectaire Ltd, Lincoln Road, Cressex Business Park, High Wycombe, Buckinghamshire, HP12 3RH
Tel: [phone]. Fax: [phone].
Email: [email protected] Web: www.vectaire.co.uk
Page 16
Servicing & Maintenance
Serviced by Company Name Date Notes
Ensure this booklet is passed to the householder once installation and commission of
the ventilation system is complete.
This booklet MUST be kept in the Home Information Pack and used as a service
record.
Installed by :
Date of Commissioning:
Commissioned by:
Boost Switch Method:
Boost Switch Location:
WHHR125DC0211 E & O.E