Titon HRV1.35 Q Plus ECO Assembly instructions

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Mechanical Ventilation Systems
Installers Guide

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Contents
Introduction .............................................................................................................................................. 3
The Top Ten Installation Mistakes
1. Not using or following a professional system design (poor performance, excessive noise) ........................................ 4
2. Excessive use of exible ducting (poor performance, excessive noise)......................................................... 4
3. Not adequately sealing or supporting ducts (poor performance, excessive noise) ........................................ 5
4. Using the wrong type of terminals (poor performance, excessive noise)....................................................... 5
5. Not insulating ducting (excess moisture, water leaks).................................................................................... 6
6. Wiring a ventilation unit incorrectly (unit not running, not responding to controls) ......................................... 6
7. Not installing user controls or adjusting humidity or timer settings (excessive noise -
unit not boosting or boosting automatically) ................................................................................................... 7
8. Not commissioning the system correctly (excessive noise - unit not boosting).............................................. 7
9. Not checking the MVHR unit lters (poor performance)................................................................................. 8
10. Boxing in the ventilation unit or locating out of normal reach ....................................................................... 8
Troubleshooting Checklists
FAQ’s: Ventilation System Not Working............................................................................................................. 9
FAQ’s: Excessive Noise From The Ventilation System...................................................................................... 9
FAQ’s: Insufcient Airow.................................................................................................................................. 11
FAQ’s: Ventilation System Constantly Boosting................................................................................................ 12
FAQ’s: Water Leaks From Ventilation Fan Unit................................................................................................. 13
FAQ’s: The Ventilation System is Ineffective..................................................................................................... 13
FAQ’s: The Ventilation System Slows Down Intermittently ............................................................................... 14

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Introduction
Titon products are manufactured to meet demanding European Standards and are rigorously
tested prior to sale so failures as a result of manufacturing defects are extremely rare. The
great majority of complaints that Titon Engineers are called out to site to resolve are the result of
installation or commissioning mistakes or the product being damaged by mishandling which are
counter chargeable. Here we set out the most common mistakes that lead to complaints and a
set of troubleshooting guides to help identify the cause of complaints.
Titon offer a comprehensive manufacturer’s product guarantee but Titon are not responsible for
installation or commissioning mistakes. Always follow the detailed guidance contained in the
product manual supplied with all Mechanical Extract Ventilation and Heat Recovery Ventilation
products.
Titon also strongly recommends reading the guidance set out in the Domestic Ventilation
compliance Guide that accompanies Part F of the Building Regulations, and Chapter 8.3 of the
NHBC Technical Standards 2016 which should be familiar to all professional domestic ventilation
systems installers.
Titon product handbooks including links to further guidance can be found at www.titon.co.uk.
Online Searches
• Building Regulations Approved Document F (Ventilation)
• Domestic Ventilation Compliance Guide (accompanies the above)
• NHBC Technical Standard 8.3 (2016): Mechanical Ventilation with Heat Recovery

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Excessive use of exible ducting damaged, crushed, twisted and not pulled taut causing a blockage or excessive resistance to airow
Ventilation system design drawing
The Top Ten Installation Mistakes
1. Not using or following a professional system design (poor performance, excessive noise)
Ventilation Systems must be professionally designed to ensure they meet the required performance
standards and work quietly and efciently. The System Designer should provide detailed
drawings showing the layout, all product selections and the design performance characteristics.
Any variation from the design provided must be approved by the System Designer to ensure
performance is not adversely affected. If you choose to not to use a professional design or to
vary from a design provided you may be held responsible for any subsequent performance issues.
2. Excessive use of exible ducting (poor performance, excessive noise)
Even when it is installed properly, exible ducting has a much greater resistance to airow than
smooth bore rigid ducting and its use must be avoided where possible. Where it is used, for
example, to connect the MVHR unit to the solid ducting to allow for slight differences in
alignment. We recommend it should only be used in short straight lengths pulled taut to a
maximum length of 300mm.

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3. Not adequately sealing or supporting ducts (poor performance, excessive noise)
All duct joints must be made airtight and properly sealed by either using a proprietary tting
with an integral rubber seal or by applying a suitable non-hardening sealant. Duct tape alone is
not suitable and will not provide a long term seal. Ducting should be supported to ensure it will
remain intact and not cause joint stress.
Silicone sealed and bracketed Titon Self Seal Connector
4. Using the wrong type of terminals (poor performance, excessive noise)
There are many products sold as ventilation terminals that are totally unsuitable for systems
ventilation as they will strangle airow or allow water ingress. Only use the terminals detailed by
the System Designer that have been chosen because they meet specic performance standards
for use with continuously running mechanical ventilation systems. Terminals tted with an insect
guard, ridge ventilation terminals, SVP or ue terminals are normally unsuitable.
Inappropriate wall terminals can increase resistance, causing excessive noise from the MVHR unit

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5. Not insulating ducting (excess moisture, water leaks)
When warm air comes in to contact with a cold surface it produces moisture. Moisture may form
on the inside or the outside of a duct and may collect in the ducting system and unit or damage
surroundings. All ducting and duct accessories connected to the outside air, or running outside
the heated space, must be continuously insulated and the insulation must have a vapour barrier
to prevent it from absorbing the moisture. Any vertical ducting carrying the extracted air to the
outside may also require an additional inline condensation trap. The smallest of gaps in the
insulation can result in water damage.
Ductwork soaked and dripping Ductwork with no insulation
6. Wiring a ventilation unit incorrectly (unit not running, not responding to controls)
Your product may use zero or low voltage switching circuits and accessories that can be easily
damaged by the application of high (mains) voltage or can be affected by induced power when
running cables together with higher voltages. Always ensure the product handbook instructions
have been followed before making any connections.
Blown PCB controller

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7. Not installing user controls or adjusting humidity or timer settings (excessive noise -
unit not boosting or boosting automatically)
Most ventilation systems require electrical controls and accessories to be installed. All controls
should be easily accessible and be clearly labelled. For example, ventilation systems boost and
SUMMERboost®controls should be conveniently located and made obvious to the user. Some
units also include automatic functions that may need adjustment such as timer or humidity
settings. Always ensure the product handbook instructions have been followed.
Titon auralite®status indicator Titon SUMMERboost®switch
8. Not commissioning the system correctly (excessive noise - unit not boosting)
All ventilation systems require on-site commissioning and performance checks to ensure
Building Regulations compliance. Commissioning includes setting the unit speeds and using an
airow meter to set the individual room airow rates to achieve the rates set out by the system
designer. It may also include adjusting other settings such as overrun timers and humidity
controls. The commissioning engineer should record the installed performance of the ventilation
system (forms are provided in the Domestic Ventilation Compliance Guide that accompanies
Part F of the Building Regulations).
Balancing MVHR settings Using a cone anemometer

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9. Not checking the MVHR unit lters (poor performance)
We recommend that MVHR lters are checked prior to commissioning and handover to the
owner as building work produces high levels of contaminants that may enter the ventilation
system and block lters. All MVHR units require servicing and lter replacement, the
recommended service interval is one year, or less in where ambient pollution levels are higher
such as in urban environments.
10. Boxing in the ventilation unit or locating out of normal reach
Ventilation units must remain safely accessible to allow commissioning adjustments,
maintenance, repair and end of life replacement. Units must not be “boxed in” and the product
handbook includes detailed guidance on access requirements. Any serviceable appliance
located in a loft cavity must have safe oor boarding directly from the access hatch to the repair
area and provision for adequate lighting to meet with health and safety at work regulations.
There are also statutory access requirements where units are installed out of reach.
Titon G3 HRV lter Titon G4 HRV lter
Cupboard with insufcient space in front of the unit
to allow maintenance or repair
An accessible MVHR unit

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Troubleshooting Checklists
FAQ’s: Ventilation System Not Working
Check the Ventilation Unit is supplied with power. Check the mains circuit is live, check the fuse at
local isolator and that each wire core is making contact with terminal at outlet point.
Turn off the power to the Ventilation Unit at the local isolating. Carry out appropriate electrical
safety checks and taking effective precautions ensure that the Ventilation Unit has been wired in
accordance with the Product Handbook requirements. Ensure that no other power source has
been connected to boost circuits as this will damage the electrical components within the unit and
may cause the unit not to run, not to boost or to boost constantly.
(MVHR Only) Ventilation Units are tted with Automatic Frost Protection Systems that may
automatically reduce the supply air rate during periods where temperatures drop below freezing
especially for long periods and may activate particularly if home has been unheated for more than
24hrs.
(MVHR Only) Some Ventilation Units include a Summer Mode facility that allows the supply air
fan to be turned off by the occupant using an external switch, check if switch is installed at PCB
connections and activated or that PCB terminals have been used in error to connect to a circuit
intended for an alternative use.
Correctly installed product may be running quietly and efciently making it difcult to hear the
fan(s), also the low airow rates required in smaller dwellings may not always be obvious without
close inspection of the room air valves. Also, in some circumstances there may not be a notice-
able increase in sound levels between normal and boost speeds.
Check the unit has been commissioned and set to operate at the appropriate speed settings in
accordance with the Dwelling Commissioning Rates specied by the System Designer.
Check the commissioning control is in the “run” position (MVHR – the sliding switch is in central
position) (CME – the link is on one pin and not making the circuit and not still connected to both
pins) and check no other cables normally attached to the PCB have been disconnected
accidentally.
FAQ’s: Excessive Noise From The Ventilation System
Turn off the power to the Ventilation Unit at the local isolating. Carry out appropriate electrical
safety checks and taking effective precautions ensure that the Ventilation Unit has been wired in
accordance with the Product Handbook requirements. Ensure that no other power source has
been connected to boost circuits as this will damage the electrical components within the unit and
may cause the unit not to run, not to boost or to boost constantly.
Ensure boost control circuit opens/closes as required at PCB connections.
Check the timer overrun setting (CME adjustable between 0 – 30 minutes, MVHR 0 - 60 mins).
(MVHR Only) Some Ventilation Units are tted with Constant Volume fans that automatically
compensate for an increased backpressure to maintain airows by increasing speed. These fan
types will also react by increasing to maximum speed if ducting systems are blocked which can
be determined by checking if the fans slow down as pressure is released by opening the
Ventilation Unit front cover.
Some Ventilation Units are tted with integral humidity sensors to boost the system automatically,
check humidity settings as adjustment may be required.

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(MVHR Only) Some Ventilation Units are tted with an automatic SUMMERboost©facility that may
activate as temperatures increase. Check link is present at terminals on PCB if unused or check
to ensure that switch has not been closed and SUMMERboost is operational.
(MVHR Only) Turn off the power supply, remove the front cover (refer to product manual) and
check the fans for any obstructions caused by debris, they must rotate freely. In extreme cases
where the fans have been subjected to mishandling or debris damage it may result in the fan
assemblies running out of balance. Check all duct ports are free from debris, particularly those on
the top of vertically mounted units.
Check the unit has been commissioned and set to operate at the appropriate speed settings in
accordance with the Dwelling Commissioning Rates specied by the System Designer.
Check the commissioning control is in the “run” position (MVHR – the sliding switch is in central
position) (CME – the link is on one pin and not making the circuit and not still connected to both
pins) and check no other cables normally attached to the PCD have been disconnected
accidentally.
(MVHR Only) Turn off the power supply, remove the front (refer to product manual) and check the
lters (if tted) are clean and not blocked by debris. Make sure that there is no debris (such as
plaster or masonry dust) within the unit’s internal airways leading to the fans.
Check the duct cross-sectional dimensions comply with the System Design specications
(usually a minimum of ø125mm or 204 mm x 60mm rectangular for MVHR systems and for the
main exhaust duct to outside for CME systems).
Check the ductwork for blockages. Any restriction in any part of the system will create a
resistance to air ow and noise.
Check ANY FLEXIBLE DUCTING used does not exceed the lengths specied by the System
Design (normally 300mm maximum) and that it is pulled taut and straight. Flexible ducting is
highly resistive to airow and will easily crease or distort causing a blockage.
Check all ducts, joints and accessories are leak free. All joints must be fully sealed using a
proprietary product such as the Titon Self Seal Coupler or by using a exible joint sealant. Duct
tape alone is not sufcient and will not provide an effective long term seal.
Check that no additional ducting, bends, tee pieces or other accessories have been used over
and above that specied in the System Design. Any change to the specied design such as a
change in duct size or layout may have a detrimental impact on system performance and increase
the fan load resulting in the need to increase fan speed and the unintentional creation of
excessive noise.
Check the supply and extract diffusers are appropriately tted in accordance with the air ow
direction required, and they are not closed off. Extract and supply diffusers differ from each other
and must be used appropriately.
Check the air velocities at the terminals meets with the specied requirement System Design
requirements. Check static pressure at fan inlets and outlets with a manometer (and Pitot tube if
available).
Check the Ventilation Unit installed has the capacity and performance specied by the System
Designer and it is not undersized.
FAQ’s: Excessive Noise From The Ventilation System (Continued)