Vectaire WHHR125DC Assembly instructions

"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.
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 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.
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 air travels from terminals built into the ceiling which are connected by hidden ducts to the unit. The
unit is usually installed in a roof space or cupboard.
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. This may be done automatically by elec-
tronic sensors or by a conveniently located boost switch for manual operation.
DO NOT switch off the unit; it is designed to run continu-
ously and should not be switched off, except for mainte-
nance or filter replacement. It is important to follow the
advice in this user manual and correctly maintain the sys-
tem to ensure a healthy indoor environment.
If a boost switch has been installed, it can be used to increase
the extract ventilation rate at times when moisture or pollu-
tant levels are considered excessive. The unit has an integral
over-run timer and will continue at boost speed for a short
period of time (set at installation) when the boost switch is
moved back to the off position.
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.
• Quick commission setting with 5 or 10 minute boost delay.
• Full commission setting for ultimate efficiency with 5, 10, 15 or 20 minute boost delay.
• The duct ports accept 100 and 125mm diameter ducting.
• Frost protection ensures that low temperatures do not affect
the efficiency.
• 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)
Page 4
How the system works
System Layout 1
System Layout 2

IMPORTANT: READ THESE INSTRUCTIONS
FULLY BEFORE INSTALLATING THIS
APPLIANCE!
The Vectaire WHHR125DC is designed to be fitted
into the roof space or a cupboard. These diagrams
show the dimensions 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 mainte-
nance.
The appliance must NOT be installed in an environ-
ment 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 carried out by a suitably qualified, competent
person and all wiring must be in accordance with
current I.E.E. Regulations and all appropriate
standards.
• The appliance must be connected to a local isola
tion switch with a contact separation of at least
3mm.
• The appliance is suitable for 230V - 50Hz single
phase fuse rating of 3A.
• The condensation drain must be fitted.
• Ensure that external grills are located at least 600mm 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.
• We recommend a minimum distance of 2m between the external air supply inlet and the extract
air outlet to prevent cross contamination.
• We recommend a minimum distance of 200mm between the appliance and any sharp bends in
duct work.
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.
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
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.
Installation - mounting
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

5. Fix the remaining bracket to the unit using the M6
screws and washers provided, ensuring the interlocking
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
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
.
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
transport 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.
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
• The use of flexible ducting must be kept to a minimum
and it should always be pulled taut.
• If applicable, Fire Dampers MUST BE FITTED to duct
work at appropriate locations in accordance with Building
Regulations.
• Ducting must be installed in such a way that resistance
to airflow is minimised.
• Ducting terminals for Inlet and exhaust 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.
• Ducting in unheated spaces must always be insulated to
prevent condensation forming within the ducting.
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~50Hz 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.
• Boost controls must not be located within
1 metre of a cooker or where they may be
affected by excessive heat or moisture
• Boost controls should be clearly identified and
conveniently located.
• The boost switch wiring must not be connect
ed to the mains supply.
• The boost switch is connected to the control
board (which is located under the hinged cover
on the top of the unit).
• The boost switch wiring cable access is via a
12mm cable gland.
• The boost switch wiring connection should be
made by the 5v+ and SW terminals on the
control board.
• 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)
• The boost facility features a delay timer, so we
recommend a sprung-return (momentary)
switch is used to prevent the boost being
accidentally left on for longer than intended.
Page 10
Installation - Wiring

The unit has two commissioning modes:
• Quick commission – for easy installation and setup.
• Full commission – for optimum efficiency and system
performance.
Quick commissioning mode
1. Switch the unit on.
2. Gain access to the control board located under the door
on the top of the unit (see diagram).
3. Select required speed setting using switches 2 to 4 on
the Speed Selection Switch (see below)
4. Select required boost delay using switch 1 on the Speed
Selection Switch.
5. Check boost activation by triggering the remote boost
switch device.
Note: the boost speed setting is a fixed increase over the
continuous running mode.
See below for Speed Selection Switch settings in Quick
Commission mode:
Speed setting percentages relate to the total capacity of the unit at low or normal running speed. The
speed of the Vectaire WHHR125DC will require adjustment to ensure the flow rates achieved provide
adequate ventilation in accordance with all relevant Building Regulations and applicable Standards.
Page 11
Commissioning - Quick Mode

Full Commissioning Mode
To commission the unit fully for optimum efficiency, each step below MUST be followed in sequence:
1. Switch the unit on.
2. Gain access to the control board located under the door on the top of the unit.
Continuous speed setting
3. Move the jumper from the stored position to the ON position.
4. Ensure the controller is in Continuous mode
(switch 1 on the Speed Selection Switch).
5. Select required setting for continuous speed
using switches 2 to 4 on the Speed Selection
Switch (see diagram)
Speed setting percentages relate to the total
capacity of the unit at low or normal running
speed. The speed of the Vectaire WHHR125DC
will require adjustment to ensure the flow rates
achieved provide adequate ventilation in accor-
dance with all relevant Building Regulations and
applicable Standards.
Page 12
Commissioning - Full Mode

Boost speed setting
6. Select Boost
mode on switch
1 of the speed
selection switch.
7. Select required
range for boost
speed using
switches 2 to 4
on the speed
selection switch.
8 Fine adjustment
within each speed
range can be car
ried out using the
potentiometer
(POT) on the con
trol board (see
diagram).
Do not return
switch to continu-
ous mode as this
will change the
boost speed set-
ting.
9. Once the Continuous and Boost speeds have been set, remove the
jumper and return to the stored position.
10. Select required boost delay using switch
1 and 2 on the speed selection switch.
11. Check boost activation by triggering the
remote boost switch device.
Resetting the Controller
If necessary the controller can be reset into
the Quick commissioning mode.
1. Place the jumper in to the ON position.
2. Switch the power to the unit OFF for at least 1 minute.
3. Switch the power to the unit back ON. The unit will now run at 50% capacity by default.
4. Remove the jumper and place it back into it stored position.The controller will now be in the Quick
Commissioning mode.
Page 13
Commissioning - Full Mode

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.
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. Remove the heat exchanger by gently pulling
the plastic band around it.
4. Clean the filters carefully using a vacuum
cleaner.
5. 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.
6. Return the heat exchanger and filters to their
original position.
7. Replace the front cover and ensure it is
securely located at the top before tightening
all screws.
8. 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]
After servicing, always complete the service record on page 16.
Page 15
Servicing & Maintenance

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:
WHHR125DC170210 E & O.E