Vent-Axia Advance MVHR User manual

Copyright © 2023 Vent-Axia. All rights reserved.
Advance
MVHR
Interim Controls Guide
Original Instructions
PLEASE REFER TO ACCOMPANYING DOCUMENTATION
FOR INFORMATION SPECIFIC TO YOUR UNIT.
PLEASE RETAIN THESE INSTRUCTIONS WITH THE
PRODUCT.
PLEASE READ THESE INSTRUCTIONS CAREFULLY
ALONGSIDE YOUR INSTALLATION & USER GUIDE
BEFORE COMMENCING INSTALLATION OR OPERATION.

Warnings and Safety Information
2
•Do not install this product in areas where the following may be present or occur:
•Excessive oil or a grease laden
atmosphere.
•Corrosive or flammable gases, liquids or
vapours.
•Subject to direct water spray from hoses.
•Ambient temperatures higher than 40°C
and lower than -20°C.
•Possible obstructions that may hinder
access to or removal of the unit.
•All wiring must be in accordance with the current IET wiring regulations BS7671, or appropriate
standards of your country. Installation should be inspected and tested by a suitably qualified
person after completion.
•Ensure the mains supply (voltage, frequency and phase) complies with the rating label.
•The unit should be provided with a local double pole fused spur fitted with a 3A fuse having a
contact separation of at least 3mm. If a unit fitted with a preheater is being installed, a 13A fuse
should be used.
•These units must be earthed.
•Precautions must be taken to avoid the backflow of gases into the building from the open flue of
gas or other fuel-burning appliances.
•This appliance is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the appliance by a person responsible for their safety.
•Young children should be supervised to ensure that they do not play with the appliance.
•The installer is responsible for the installation and electrical connection of the sentinel system on
site. It is the responsibility of the installer to ensure that the equipment is safely and securely
installed and left only when mechanically and electrically safe.
•All regulations and requirements must be strictly followed to prevent hazards to life and property,
both during and after installation, and during any subsequent servicing and maintenance.
•The unit’s condensate drain must be connected to the building’s wastewater drainage system.
•Certain applications may require the installation of sound attenuation to achieve the sound levels
required.
•The unit must not be connected directly to a tumble drier.
•The supply and exhaust valves must be fully opened prior to commissioning.
•The intake air must be drawn from the exterior of the property.
•The unit should be allowed to stabilise during commissioning for a minimum period of 5 minutes
when changing between boost and normal speeds.
•External grilles should be positioned in accordance with your local building regulations, however
as a minimum we recommend that the inlet grille is kept 2m from any discharge grille or flue
outlet.
•This product and associated duct installation should be carried out in accordance with the
Domestic Ventilation Compliance Guide.
UK Building Regulations (Part F) Declaration of Conformance
The unit conforms to the 2010 Building Regulation (Part F - Means of Ventilation, F1(1), F(2)) requirements for fixed
systems for mechanical extract fans when installed in accordance with the instructions in this document and the
Domestic Ventilation Compliance Guide

3
CONTENTS
Electrical Installation 4
Electrical Installation 4
Connecting Switches and Sensors 5
Connecting the Power Supply and Light Switch 7
Operating and Monitoring 8
Powering up the Unit 8
Initialisation/Loading Screen 8
Serial number on initialisation 8
Overview 9
Display overview –Home screen 9
Home user menu 10
Display overview –Additional icons 10
Display overview –Mode indicators 11
Display overview –Indoor air quality monitor 11
Display overview –Heat Recovery mode 12
Smart Device Pairing and App Download 12
Pairing sensors 13
Removing sensors 13
Speed Override 14
Schedule 14
Filter Reset 15
Warning Screen 15
Service Interval Remaining 15
Notifications if any 15
Engineer menu 16
Engineer menu –Overview 16
Engineer menu –Unit Handing 17
Engineer menu –Airflow units 17
Engineer menu –Airflow speed setting 18
Engineer menu –Port allocation LS 18
Engineer menu –Port allocation SW 19
Engineer menu –Proportional control 19
Engineer menu –Service Intervals 20
Engineer menu –Summer bypass 20
Engineer menu –Humidity 21
Engineer menu –CO2 threshold 21
Engineer menu –Date / Time 22
Engineer menu –PIN Change 22
Engineer menu –Default settings 23
HMI Hard Reset 23
Maintenance 24
Filter Maintenace 24
Spares 25
Diagnosing a Problem 26
Power on Self-Test –HMI 27
Power on Self-Test –Mainsboard 27
Accessories 28
Wall-Mounting HMI Kit 28
Remote LED Indicator 28
Technical Data 29
Flow Rate settings 29
Frost Protection 29
Disposal 32
The Guarantee/Claim on Warranty 32
Contact Details 32

4
ELECTRICAL INSTALLATION
Electrical Installation
Step 1: Remove the front cover by pressing
the tabs either side of the control module and
lifting the cover outwards from the bottom edge.
Step 2: Remove the two screws on either
side of the access panel. Lift the panel
outwards from the bottom edge to remove.
Note: The access panel is tethered on the
left-hand side.
Note: All printed circuit boards are ESD
sensitive. Always ensure the correct ESD
protection is used.
Step 3: Push the locking tab away from the
printed circuit board and slide it outwards to
access the terminals.
Note: The printed circuit board will relock
after 60mm.
WARNING
ENSURE THE ELECTRICAL SUPPLY AND CONTROLS ARE ISOLATED
FROM THE MAINS POWER SUPPLY BEFORE REMOVING ACCESS COVERS

5
ELECTRICAL INSTALLATION
Connecting Switches and Sensors
The unit can be switched to boost by applying 240V to the LS input.
For good EMC engineering practice, any sensor, switched live or Volt free cables should
not be installed within 50mm of other cable or on the same metal cable tray as other
cables.
Connect any switches or sensors required to control the unit by connecting to the terminal
connectors at the bottom of the control unit as shown on the next page in Table 1. If necessary,
contact your distributor regarding the wiring and fixing of accessories and sensors.
When fitting external controls, all cables should be routed through the two cable channels on
the underside of the unit shown below.
Figure 4: cable channels

6
ELECTRICAL INSTALLATION
Table 1: Terminal Connections
Terminal No.
Name
Description
LS2
Switched Live 2
220-240 V AC, 50 Hz input
NS2
Switched Neutral 2
220-240 V AC, 50 Hz input
LS
Switch Live
Switch Live (Common neutral with Mains Supply)
EARTH
Mains Earth
Earth connector
N
Mains Neutral
220-240 V AC, 50 Hz input
L
Mains Live
220-240 V AC, 50 Hz input
LED
Red Light Emitting
Diode Output
A LED driving signal output between the - and + terminals that
enables remote indication of a unit fault. See the Control Panel
for fault code (see on page 26). May also be used for a
connection to a BMS or similar.
P2 -s+
P1 -s+
0-10V
0-10V sensor input with 24V supply terminal
SW 1-5
Switch 1 to 5
Volt-free contact for sensor input between - and + terminals
0V, B, A, 5V
Sensor Bus
RS485 Termination for remote wired sensors/Controller
Other means of connecting the
unit may be used if they meet the
local wiring regulations.
SEE NOTES ON THE NEXT PAGE

7
ELECTRICAL INSTALLATION
Connecting the Power Supply and Light Switch
WARNINGS
1. MAINS SUPPLY VOLTAGES (220-240 V AC) ARE PRESENT IN THIS EQUIPMENT,
WHICH MAY CAUSE DEATH OR SERIOUS INJURY BY ELECTRIC SHOCK. ONLY A
SUITABLY QUALIFIED PERSON SHOULD CONNECT THE POWER SUPPLY TO THIS
UNIT.
2. THIS UNIT MUST BE CORRECTLY EARTHED.
3. ALL EXTERNAL WIRING MUST BE FIXED WIRING
This unit is designed for operation from a single-phase alternating current source (220-240 VAC).
A 1.5m cable is connected internally to the unit for connection to an isolator switch.
If the supply cord is damaged, it must be replaced by a special cord or assembly available
from the manufacturer or its service agent.
To connect the power supply:
Ensure the local AC power supply is switched off.
One end of the power cable supplied is already connected to the unit in the manner shown above.
Connect the other end of the cable to the switched fused spur.
Use cable clamps and clips to secure the cable, as appropriate.
Connecting a Boost (Light) Switch
A Switched Live LS may be used to boost
the airflow when a light is turned on, for
instance in a bathroom or kitchen. If the
LS core of the mains cable is not used it
should be terminated in an appropriate
manner.
The LS connection should only be used
if the switch live is on the same circuit
as the unit.
Connecting a Boost (Light) Switch from
a different circuit
If the supply used for the Switched Live is
on a different circuit to the power
connections, the connections LS2 and
NS2 should used, via a separate isolator.

8
OPERATING & MONITORING
Powering up the Unit
Switching On
To switch the unit on:
1. Switch on the power at the mains supply isolator feeding the unit.
2. Following switch-on, after initialisation (up to 2 minutes) the fan motors will start and the
Control Unit will display the home screen.
N.B. If you are intending to carry out work or maintenance inside the unit, isolate the supply
to the unit before removing any covers.
Switching Off
To switch the unit off:
1. Turn the power off at the mains supply isolator.
Initialisation/Loading Screen
Serial number on initialisation
Serial number
displayed after
initialisation is
complete.
Firmware version
1 –HMI
2 –Bluetooth & WiFi
3 –PCB Main Board
The Initialisation
can take 2 minutes
to complete.
Primary Devices
Idle White LED indicates
primary HMI, this device
supports Bluetooth/Wifi
connection (see Smart
Device Pairing)
Additional Devices
(If purchased)
Idle Green LED indicates
secondary HMI device, no
Bluetooth/WiFi support.
(Refer to Pairing Sensors)

9
OPERATING & MONITORING
Overview
The instructions in this section are intended to provide configuration and operation information for setting
up the equipment. In the event of problems, see Diagnosing a Problem on page 26.
Follow good practice when commissioning the unit. Ensure that the system is installed according to the
system designer’s intent incorporating any acoustic ducting, that all joints are airtight, ducting is well
supported, bends are avoided close to vents, and that the vent valves are fully open at the start of the
commissioning process.
Commissioning of the unit should be done via the App. See page 12 for Smart Device Pairing.
Display overview –Home screen
Time and Date
Outside temperature
Ventilation mode (Auto)
Heat recovery mode
Supply speed %
Internal temperature
Relative humidity %
IAQ indicator
Extract speed %
Fan speed

10
OPERATING & MONITORING
Home User Menu
Display overview –Additional icons
Datalogger
Clock &
Countdown Timer
Summer bypass
active
Anti-frost Active
Filter
Notification
Warning
Wi-fi
Bluetooth
Pressure icon
Pre-heater
Home screen
Heat recovery %
Scheduled time slots
Filter life remaining
Service interval remaining
Warnings (If any)
Notification (If any)
Adjustable
Adjustable
Read only
Read only
Read only
Visible only if
warning is present
Read only
Visible only if
notification is present

11
OPERATING & MONITORING
Display overview –Mode indicators
Display overview –Indoor air quality monitor
In conjunction with
and linked to:
•CO2
•TVOC
•Relative humidity
IAQ indicator
No additional
demand
Proportional
demand
Full boost
operation
Auto Mode
Night Mode
Humidity
Override
Switch
Override
LS Override
CO2 Override
User Override
Temperature
Override
Schedule
Override
0-10V Override
Silent Hours

12
OPERATING & MONITORING
Display overview –Heat Recovery mode
Smartphone Device Pairing and App download
The App allows the user instant access to commissioning, configuration, direct monitoring and control
of the MVHR unit, using a smart phone or tablet with the Vent-Axia Connect App, available from the
iTunes Store or on Google Play.
Bluetooth icon will appear
To be utilized in
conjunction with
App Instructions
Press and hold for
8 seconds, until
Blue LED is
illuminated.
WiFi icon will appear
Flashing Blue LED =
Pairing/Enabled.
Solid Blue LED = User
Connected/Authenticated.
Heat Recovery Mode
Bypass
Balance
Imbalanced

13
OPERATING & MONITORING
Pairing sensors
To pair the unit with a wired or wireless sensor:
•Press the MENU button to turn on the display.
•Press and hold the MENU button until the LED illuminates solid White.
•Release the MENU button, the LED will flash White to indicate that it is in pairing mode. The unit will
remain in pairing mode for 5 minutes, or until the MENU button is pressed again.
•Activate the pairing function on the sensor to be paired (see the instructions that came with the sensor).
•When a sensor is paired the total number of paired devices is displayed on the unit (P-XX).
Removing sensors
To remove paired sensors, the unit must be reset. Caution, this will reset all values back to factory default.
•Press the MENU button to turn on the display.
•Press and hold the MENU button until the LED illuminates solid Red.
•Release the MENU button, the LED will stay Red.
•Pressing the MENU button again will confirm the reset command. If a reset is not wanted, leave the
unit until the command times out and the LED turns off.

14
OPERATING & MONITORING
Speed override
Schedule
Finish
Time
Fan Speed
1 Bar = Low
2 Bar = Normal
3 Bar = Boost
4 Bar = Purge
Day 1 =
Monday
Start
Time
Press 2 x from Home
Screen to enter
scheduling.
Enter edit mode/Confirm
Selection.
Move between existing
schedules and adjust
schedule times/days in
edit mode.
Change Fan Speed –Low,
Normal, Boost, Purge
when flashing.
Home screen
Override timer
Increase Timer
Decrease Timer
Change Fan Speed –Low, Normal, Boost, Purge
Confirm Timer

15
OPERATING & MONITORING
Filter reset
Warning Screen Service Interval Remaining Notifications if any
Please see Page 26
for warning codes
Filter life remaining
Press 3 x from Home
Screen to enter filter screen.
Enter Reset/Confirm
Selection.
Change service duration for
filters: 3, 6 or 12 months.
Months remaining, will indicate when filters
need replacing/cleaning.
Models with filter pressure sensors fitted,
filter life is indicated by % block values.
Please see Page 26
for warning codes
Important: This
screen is only
visible if a warning
or fault is known.
Month remaining
before service is due.

16
OPERATING & MONITORING
Engineer menu
Engineer menu Overview
Use up and down to adjust each pin
number and press to confirm each
number and enter Engineer settings.
Engineering mode
Press and hold for 3 seconds to
exit or enter the Engineer Menu.
Handing
Airflow units
Speed setting
Port allocation LS
Port allocation SW
CO2
Relative humidity
Summer bypass
Date and time
PIN reset
Default settings
Important: “Air flow units”
is only visible on Constant
volume models and “CO2”
is only visible when using a
CO2 sensor.

17
OPERATING & MONITORING
Engineer menu –Unit handing
Engineer menu –Airflow units
Enter Menu/Confirm Selection
Left Handed = L
Right Handed = R
Left
Handed
Right
Handed
User can select preferred
airflow units.
Enter Menu/Confirm Selection
Alternate measures
This is only visible and used on
Constant volume models.

18
OPERATING & MONITORING
Engineer menu –Airflow speed setting
Engineer menu –Port allocation LS
% will be displayed
as l/s for Constant
volume models.
PR1 = Low Speed 20%
Default
PR2
= Normal Speed 30%
Default
PR3 = Boost Speed 50%
Default
PR4
= Purge Speed 100%
Default
Select PR1-4
Enter/Confirm
Selection
Adjust flow rate
as % pr l/s
MVHR unit will run at speed indicated on this screen to aid commissioning.
Change Fan Speed –Low, Normal, Boost, Purge
Enter/Confirm Selection
Change Port for Live Switch LS01 or LS02
Other switch modes are available when
configured through the App.

19
OPERATING & MONITORING
Engineer menu –Port allocation SW
Engineer menu –Proportional control
Change Fan Speed –Low, Normal, Boost, Purge
Enter/Confirm Selection
Change Port Switch SW01 to SW05
Press Once for Zonal Selection
Press twice for Control method Selection
Change Proportional Control P1 or P2
Change Zonal Control 1-15
or
Control Method Temperature,
Humidity, 0-10V, CO2

20
OPERATING & MONITORING
Engineer menu –Service Intervals
Engineer menu –Summer bypass
Service Icon
Enter/Confirm Selection
Reset Service Interval
Change service interval
1-60 months.
Outdoor
Temperature
Bypass Mode
Indoor
Temperature
Fan Speed
Press 1 x for Bypass Mode
Change field up/down
Change Fan Speed - Low, Normal, Boost, Purge
Press 2 x for Indoor Temperature
Press 3 x for Outdoor Temperature
00 = Disabled (not recommended)
01 = Normal Bypass
02 = Evening Fresh
03 = Night-Time Fresh
See page 38 for details
Press 4 x for return to main menu