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Midi BY AT
- very low noise levels - tested by BRE
- lined with Class "O" fire resistant acoustic foam
- with summer bypass and frost protection
- efficient, low energy solution to controlling condensation and pollution in residential properties up to 170m2
- up to 94% heat exchange efficiency
- variable choice of low (trickle), boost and purge speed at installation
- for wall, cupboard or loft installation
- universal handing for models without humidistat
- low running costs
- complies with Building Regulations
- manufactured in UK to ISO 9001:2015 and 14001:2015
- accurate commissioning via integral touch screen LCD
- SAP PCDB Listed
General
- extremely low noise levels
- up to 95 litre/sec at 50Pa - max 101 litre/sec capacity
- sfp down to 0.50 W/l/s
- summer bypass which allows the two airflows to bypass the heat exchanger automatically when internal and external temperatures are between adjustable setpoints.
- frost-stat - proportionally reduces intake motor speed as temperature falls - activated when the outside temperature between +80C and -30C.
- run-time and power outage counters
- easy to install and maintain
- easy to access G3 filters
- universal handing for models without humidistat - left or right
- for fitting vertically into lofts, or cupboards - wall fixing bracket supplied
- variable low (trickle), boost and purge options for each motor
- boost speed can be activated by a 230V switched live, or a 0-10V connection from:
- a light switch (if more than one light switch is used, each one must be a double pole switch)
- Remote humidistat (230V - DRH240)
- Passive infra red (230V - PIRFF)
- Thermostat (230V - THM)
- Remote switch/pull cord - 230V
- low running costs
- 5 year warranty - 1 year parts and labour, 4 years parts only
CONTROL FEATURES - STANDARD
- independent variable speed adjustment for each motor for trickle, boost and purge speeds.
- adjustable boost speed over-run timer from 0 to 30 minutes.
- adjustable boost speed delay from 0 to 5 minutes.
- remote purge cable connection on circuit board (for optional purge facility)
- adjustable night time boost and purge inhibitor.
- integral frost-stat - proportionally reduces intake motor speed as temperature falls
- automatic summer bypass
CONTROL FEATURES - FACTORY SET
- change of ductwork handing on humidistat version (trip point can be set at manufacture)
- integral humidistat - proportionally increases motor speeds with rising humidity
- 0-10V connections can be added for:
- BMS - for remote motor shut-off
- CO2 detector
- home automation system
- relay for external pre-heater
- 3 speed selector switch
- optional remote purge cable - factory connected - adjustable over-run timer from 0 to 250 minutes, Pre-set to 15 minutes (adjustable at factory)
- holiday mode for reduced speeds when property is unoccupied (factory set option)
- run-time and power outage counters downloadable via QR code
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Specification
- compact unit - casing from steel sheet - epoxy paint finish
- lined with Class "O: fire resistant acoustic foam
- low energy EC brushless motor with single width, single inlet, direct drive, forward curved impellors
- operates in temperature up to 60ºC
- easy to access standard, disposable G3 filters
- counter flow heat exchanger
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Compliance
- Building Regulations for enhanced energy saving capability
- Building Regulations for reliable, efficient ventilation
- EU RoHS Directive Compliant.
- Complies with IEC60335-2-80, LVD2006/95/CE and EMC2014/30/UE (European Directive against radio interference and electro-magnetic compatibility
- manufactured in UK to ISO 9001:2015 and 14001:2015
- CE marked
- SAP PCDB Listed
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Range
- Midi BY-AT - bypass, attenuation, universal, integral LCD
- Midi BYATH/LH - bypass, attenuation, humidistat, left drain, integral LCD
- Midi BYATH/RH - bypass, attenuation, humidistat, right drain, integral LCD
- MIDI-AT-F - set of filters for above models
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Typical specification
- The unit will:
- be manufactured by Vectaire Ltd.
- be constructed from steel sheet with an epoxy paint finish and the case lined and insulated with Class "O" fire resistant acoustic foam to ensure extremely low noise levels.
- be suitable for installation on walls, in cupboards or in lofts.
- have a condensate tray and drain connections for connection by others.
- have a high efficiency counterflow heat exchanger with a thermal efficiency of up to 94%
- have two low energy, high efficiency EC fan motor assemblies.
- have a specific fan power from 0.50 W/l/s.
- have two G3 grade filters to protect the heat exchanger
- will operate in temperature up to 60ºC
- have an automatic summer bypass
- have an integral frost-stat
- Units without humidistats shall be capable of being handed for left or right mounting without any on-site assembly.
- Access to filters shall be from the front by removing two magnetic strips.
- The unit shall incorporate the following control features:
STANDARD
- independent variable speed adjustment for each motor for trickle, boost and purge speeds.
- adjustable boost speed over-run timer from 0 to 30 minutes.
- adjustable boost speed delay from 0 to 5 minutes
- remote purge cable connection on circuit board (for optional purge facility)
- adjustable night time boost and purge inhibitor
- integral frost-stat - proportionally reduces intake motor speed as temperature falls
- summer bypass - automatic bypass of heat exchanger in hot weather
FACTORY SET
- change of ductwork handing on humidistat version (trip point can be set at manufacture)
- integral humidistat - proportionally increases motor speeds with rising humidity
- 0-10V connections can be added for:
- BMS - for remote motor shut-off
- CO2 detector
- home automation system
- external pre-heater
- 3 speed selector switch
- optional remote purge cable - factory connected - adjustable over-run timer from 0 to 250 minutes. Pre-set to 15 minutes (adjustable at factory)
- holiday mode for reduced speeds when property is unoccupied (factory set option)
- run-time and power outage counters downloadable via QR code.
- LCD touch screen informs user of:
- operating speed (user adjustable)
- internal and external temperatures
- status icons shows which functions currently controlling fan speed
- date and time (user adjustable)
- relative humidity level
- bypass status
- error and service notifications
- filter saturation level (reset after changing)
- user can also set system to holiday mode and set language
- (Loft mounted units can be provided with a remote LCD touch screen).
- The LCD touch screen will allow the commissioning engineer or installer to set the following parameters:
- Time and Date
- Holiday Mode
- Trickle, boost and purge speeds for each motor
- Boost speed delay time duration
- Boost over-run time duration
- Night time boost inhibitor times
- Touch screen sensitivity calibration
- Pre-heater threshold (if fitted)
- Handed installations
- Activate CO2 detector or home automation system (if fitted)
- The unit will:
- be CE marked
- comply with:
- manufactured in UK to ISO 9001:2015 and 14001:2015
- be SAP PCDB Listed
- have a 5 year warranty -1 year parts and labour and 4 years parts only
- Building Regulations for enhanced energy saving capability
- Building Regulations for reliable, efficient ventilation
- EU RoHS Directive Compliant
- IEC60335-2-80, LVD2006/95/CE and EMC2014/30/UE (European Directive against radio interference and electro-magnetic compatibility
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