Ensy AHU-700 BV/1 User manual

User manual and
Installation Guide
AHU-700 BV/1
AHU-700 BH/1

393843-2 Rev 0: 01.09.2017. BBV
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Utente manuale .Page 2 to 9
(Pictures on pages 2-5 shows AHU-700 BV/1)
To open the front hatch you will find a key
for the quarter turn latches in the folder
together with the following documents.
Keep this key in a place so it is out of reach
for children.
To open the locks, turn the key toward the
center of the unit.
Left latch Right latch
To close, after putting the hatch back on place, turn the latches the opposite way. You may use some
pressure towards the hatch to close it.
Be careful that the door can "be stuck" in the sealing on the hatch.
For easier loosening of the hatch, release it first in one corner at the top.
To operate this product people should have necessary skills, or under the supervision of
a qualified person.
Children should be told to not play with the appliance.
When you lift off the front hatch from
the device, make sure the spiral cable
that connects the device and the front
hatch is not overstretching for a long
period. This can damage the cable.
During commisioning of the
appliance, when installed,
the spiral cable has to
connected in order to have access the
control panel in front of the hatch.
When servicing and cleaning,
this spiral cable should be
disconnected. Make sure that the spiral
cable is disconnected and connected
without the use of force. This to
prevent contacts on cable to be
damaged. Note! If the spiral cable is broken, you have to order new original cable from supplier.
Standard cable from store would not work.
New spiral cable has art.no: 330541-2 from supplier.

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Before any access into the
electrical connections boxes, power
must be disconnected by pulling out
the plug from the socket.
It is only allowed for authorized persons to enter
into the electrical connection boxes
If any electrical components are damaged, they
must be replaced by the manufacturer, dealer or a
qualified person in order to avoid dangerous
situations.
Adjustment of the unit
A humidity sensor is, from factory, mounted inside
the unit. It is set to “0” that means it is set to not
active.
After startup, where the unit is placed into a new building with high
humidity, you can let this humidity sensor be turned off for a period to
avoid the full speed of the fan at night. To get the humidity sensor to
operate as intended, you need at one time to put it active. Than you
need to set the switch in position "1".
If the ventilation unit is placed in a house without high humidity, you should switch to position "1"
after you putting ventilation unit into operation.
This switch will also affect any extra external humidity sensor that is plugged into the device
Adjusting the humidity sensor.
If it is necessary to adjust the sensitivity of the humidity sensor
then you must, on older models, remove the cover, which is over
the control board where this adjustment is located.
Unplug the supply before removing the cover
On newer models, you just can remove the black
plug and you then can see the adjusting knob and
the RH% scale
Pictures shows AHU-700-BV/1

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The sensor is set to 80% RH from factory.
If you do adjustments, this only affect the
sensor integated inside the unit.
The sensitivity for the integrated sensor you can
adjusted from 50% (low) to 90% (high) in accordance
to what are the needs. The arrow points the value
chosen.If you have a second external sensor that
means you need to adjust that one from its settings
Replace the cover and / or plug after finish adjusting.
Replacing the filter.
The filters should be
replaced every 6. 9. or 12.
months.
Should be extracted without
use of any tools.
Remember to enter the
control panel menu (4.3
Filter) and press Filter OK
after the filters has been
replaced.
To guaranted optimal properties of the ventilation unit, use the original filters from
EnSy. The use of spurious filters will limit the warranty on the product.
Ensy art number for filter set is:
011460876-2 SET FILTRE ENSY AHU 700 BV/1- BH/1. F7: 165x479x94

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Cleaning the fans.
AHU-700 BV/1 BH/1
A qualified person must
do this.
Disconnect the 3-pole
and 5-pole plugs.
Before you can pull out
the fans, you have to
remove the brackets
that holds the fans in
correct position.
Important that these brackets is placed back after cleaning.
Clean with mild soap and water.

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Maintenance and cleaning of
rotary heat exchanger
This must be done by a qualified
person.
Disconnect the 3-pole plug.
Can be pulled out of the
ventilation unit without the need
for any tools .
Do not expose the rotor motor or
connector for moisture.
Rotor exchanger can easily be
removed for cleaning by dissolving
the 14 screws that hold it together.
The exchanger you also
can clean with mild soap
and water. Do not use
ammonia-containing
detergent, as this will prey on and
discolor aluminum in rotary heat
exchanger. Flushed with hand shower
and blow gently clean with
compressed air.
Ensure that the screws are
tightened sufficiently so that they
do not come loose during operation.
Preferably use a screwdriver to tight the screws. If use of electrical screwdriver, make sure that you
use low torque to prevent destroying the springs in the sheet metal parts.
To make sure that the drive belt can adjust itself into correct position you must rotate the exchanger
some few turns.
Then insert back into the ventilation unit. Be sure that rotor exchanger is properly
inserted in all the guides inside the unit. If not, this can lead to vibration in the system
and internal air leak in the unit.

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Main menu
1. Control Button indicator for fan.
2. Control Button indicator set point.
3. Control Button indicator information.
4. Control Button indicator settings.
Overview of control panel
The main screen consists of, from top, left:
Time Indication, hour, minute
Timer, Weekly schedule (if programmed)
Reheating coil (if connected)
Temperature readings, Outdoor / Indoor
Status airflow – fan speed setting
OFF MIN NORM or MAX
Temperature set point, 15 - 21 °C
Reheating coil – (here refers active element)
Rotary exchanger Indicator - (here refers
active rotary wheel)
Indicators in the menu screen:
"Sun" indicates that the rotor has
stopped, the air handling unit is in
the summer operation mode.
"Snowflake" low temperature
indicates that the air handling unit
is in defrosting mode.
"Steaming pot" and blinking fan
blades indicates that the kitchen
exhaust is activated.
"Timer" and the countdown of the
fan symbol indicate that the forced
ventilation is enabled.
From 10 up to 240 minutes
"Away" indicates when the feature
is enabled, this feature will override
timer.
"Clock over the fan symbol"
indicates that the timer is activated.
Co2 over the fan symbol" indicates
that the carbon sensor is activated.
"Exclamation point" indicates that
moisture recorded over the sensor
is higher than the set value.
May also indicate that the motion
sensor is activated if connected on
D2 signal output.
This symbol indicates that the
rotary heat exchanger is activated
and will be rotated
Control Button 1.
2.
3.
4.

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1.Fan speed
Ventilation unit has three options for choice of
airflow.
Min, Normal and Max. For programming of
values within each step, see 4.5.1.3 Using the
control button 1, and - / + buttons can change
between the pre-programmed selections.
1.1 Fan boost
Forced ventilation, fan speed increases to max
speed. (Means to the speed that is set in
menu 4.5.1.3.) The function is for use if high
humidity in bathrooms and laundry room.
Forced ventilation can be activated with
button
then
Interval adjustable from 10 - 240 min with +
and -
This picture shows 10 min forcing time, but
not activated.
To activate the fan boost use
control button 4.
You can see that the fan are running with Max
speed and the clock will start countdown.
You can easy deactivate the fan boost again
before the countdown automatically stops it.
First control buttom 1 and then 4.
This feature can also be operated with an
external pulse switch. The switch is placed in
the bathroom or adjacent rooms. Connected
to contact D1 in top of the ventilation unit.
(Look at page 23 in this manual).
If this option via D1 is intended for use against
wood stove or fireplace then it is
recommended that Max speed under Fan
control in menu 4.5.1.3. is set to Supply 100%
and adjust Extract to be 80 to 85%. (Look at
page 10 in this manual)
2. Temperature
Choose from pre-programmed temperature
settings set point between 15 - 21 °C. Setting
is changed by operating the switch buttons
below - / +symbols.
Heating element can here be set ON or OFF
by operating the switch button 4 in this
screen, but only if heater is connected.
(To see if heating coil is connected or
disconnected, see 4.5.1.1 Heater)
Indicator for activated heating coil.
Small picture show not activated.

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3. Information.
3. Information / 3.1.Alarms
When alarm you can find a source of error
here, as well as info on how the alarm is reset.
(See pages 28 and 29 in this manual)
3. Information / 3.2 Program version
Information about the software
version. This information must be provided to
service personnel at the failure of the unit.
Which display is defined as Display 1 or
Display 2 appears here if the plant has
mounted two displays.
See 4.5.1.10 selection of the displays
3. Information / 3.3. General info
Here you can see defrost mode that has
been chosen.
(See 4.5.1.9 if you want to change mode.)
4. Preferences
To navigate within the various sub-menus
when using the control buttons below the up /
down cursor key that displays on the display.
4. Preferences / 4.1 Time/date
Setting menu for Time/date. This setting is
important since the information forming the
basis for the weekly schedule function if this is
to be activated. Also for the filter alarm
function it is needed.

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4. Preferences / 4.2 Weekly schedule
Programming of the Weekly schedule, fan
speed and temperature set point. Here it can
be programmed for two periods each day. Ex.
day - night.
Every day must be programmed individually.
Monday - a period of time, select the start
time. To activate the period, X - over period
number is removed, use the -/ +keys.
Use enter to move between the different
fields.
Choose airflow (fan speed) Speed dialing -
MIN when one fan blade on the indicator is
black. NORM = two black fan blades on the
indicator. MAX speed = three black fan blades
on the indicator.
Select the desired supply air temperature you
want during the period. Settings between 15 -
21°C.
4. Preferences / 4.3 Filter
Impostare l'intervallo di tempo per la
sostituzione del filtro, le scelte attuali sono 6,
9 o 12 mesi. Rendere le scelte utilizzando i
tasti cursore + / -
Allarme reset trascorso periodo di urgente il
Menu pulsante 4, sotto "Filtro OK".
4. Preferences / 4.4 Adjust Screen
Adjusting the contrast and color on the
display.
You can also adjust how long it should be light
in the display after the operation.
4. Preferences / 4.5 Setup
To proceed, use PIN code 1000
Press +once till it shows 1000 in
display. Then press 4 times on
Then press button 3 for OK.
Start time
Stop time
Fan speed
Activation of the
period. Here not
active

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4.5.1 Setup
4.5.1.1 Heater
Turning on/off the reheating coil, use the
minus or plus button to change settings.
4.5.1.2 Cooling recovery
Activation of the cooling recovery:
It is pre-programmed two options for use
when the outside temperature is higher than
the indoor temperature, heat recovery system
will activate the function start and supply air
will be cooled by exhaust air. Engagement
when the outdoor temperature is 2 °C or 3 °C
higher than room temperature. Use button 4
to change setting for Off. Press +to activate
(On). Use button 4 to change setting for 2°C.
Press +to change to to 3°C, if wanted.
4.5.1.3 Fan control
Factory settings for per AHU-700 BV e BH, BH
you can see in next picture.
The installer can adjust these settings so that
it is adequately balanced ventilation.
4.5.1.4 Co2 control
If the unit shall be connected CO² control then
connect it to C0² connector on top of the unit.
(See page 23 in this manual).
Menu for enabling / disabling of CO² control.
Scroll to Off and press +to activate. On
Here you preprogrammed wanted ppm value
and the boost speed for the fans.
Note: To get balanced ventilation is a
prerequisite that Supply and Extract air fan
has the same value as the MAX value under
4.5.1.3
4.5.1.5 Cooker hood
Menu for programming of fan speeds by
activation of the kitchen hood. KV connector
on the top of the unit (see page 23 in this
manual) should always get signal from the
kitchen hood when this is activated. This to
prevent rotor alarm.

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Supply and Extract air should have the same
value as the MAX value under 4.5.1.3 (Set to
100% from factory.)
Even if it is installed an "active" kitchen
ventilator with piping not connected towards
the unit, the KV plug must get the signal to
see that kitchen ventilator is activated. This
can be done by using a a pressure switch in
the exhaust tube from the ventilator. Then
Extract set down to around 50% or less to
compensate for the extract air in the hood.
Note! If KV signal plug is not in use for
cooker hood then you can use the signal to get
more supply air when to fire up a fireplace.
Then adjust so that supply air delivers more
air than extract air fan. In this case you must
use a switch and not impulse switch.
4.5.1.6 Extern alarm
If the unit has been connected to an external
humidity sensor or motion sensor. Use the D2
connector on top of the unit. (See page 23 in
this manual). Note! In order for this feature to
work, you need the one-pole switch marked
RH% ON / OFF inside the unit to be set in
position 1. (See page 2 of this manual for the
location of this switch).
Supply and Extract air should have the same
value as the MAX value under 4.5.1.3 (Set to
100% from factory.)
4.5.1.7 Absent
Menu for setting the desired values by
activating away / home function.
Use the D3 connector on top of the unit. (See
page 23 in this manual) Function is operated
via an external switch.
Set value of the desired temperature will
show in the display after activating the
function.
4.5.1.8 Calibration
Menu reading of embedded temperature
sensors.
These temperature sensors are
delivered calibrated from the
manufacturer and should not be attempted
change in here.
The «Outside air» sensor normally
shows 3-6°C highter temperaature
then the reel outside temperature. This is due
to heating of the air in the duct network from
the intake grille to the intake of the unit
where the sensor are placed.

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4.5.1.9 Defrost
Menu for how to change defrost mode if
temperature is low and humidity is height.
From the start up menu you can see which
defrost mode the unit is set in.
The unit is set in mode OFF from factory.
If it is needed to change the defrost
mode to another mode then press
button 4 and scroll down to Configuration
with button 3.
Press enter button and follow procedure
as in Menu 4.5 Setup to continue.
Press enter button
Defrost mode OFF from factory..
Modus 1: at low humidity.
Defrosting function start at -20°C.
Modus 2: at normal humidity.
Defrosting function start at -15°C.
Modus 3: at high humidity.
Defrosting function start at -10°C.
The function when defrosting starts is that
each hour the supply air fan stops for 6
minutes. The heater EV turns off. Extract air
fan reduces speed to 30% and the rotary
exchanger will run as normal.
To avoid that the rotary exchanger will stop
when the cycle goes back to normal function,
the supply air fan will start up the last minute
of the defrosting mode cycle.
(Supply air fan reacts delayed relative to the
control signals and rotary exchanger so that
the heater will not engage until the speed of
the supply air fan has passed 250 r/min, in
normal operation)

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4.5.1.10 Display number
If two control panels should be used, then
from this menu it has to be specified that one
of the control panels is «Display 1» and the
other one is «Display 2». This to avoid delay in
the signals between the control panels and
main control board inside the unit.
It does not matter which of the control panels
that are called Display 1 or Display 2.

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Mounting instructions. Page 14 to 27
Table of contents:
1. General
2. Mounting of the unit
2.1 Brackets and gaskets to avoid vibration
2.2 Stopper brackets
2.3 Mounting of cooker hood
2.4 Dimensions and technical data
3. Connections
3.1 Electrical connections
3.2 Duct connections
4. Setting the airflow
5. Alarms
1. General
This guide is made to provide installation and user instructions regarding the correct installation of
AHU-700 BV/1 and BH/1.
AHU-700 BV/1 and BH/1 BH is designed for heat recovery with air volumes of up to 400 m³ / h. The
energy from the exhaust air is transferred to supply air through the rotary heat exchanger where the
air streams pass each other without making contact.
The unit has a built in-heater for supplementary heating of supply air. Humidity sensor for forced
ventilation is integrated into ventilation unit. Control panel is integrated into the front hatch. Option
for a second control panel to be connected is made outside the unit.
The unit can also connect additional equipment cooker hood over the stove, pulse switch for
controlling the forced ventilation, for example, wet rooms or bathrooms, sensor for carbon
management and switch management away / home function. Control of these options are integrated
into AHU-700 BV/1 and BH/1.
AHU-700 BV/1 and BH/1 BH is supplied in painted finish, tested and ready for operation. Installation,
commissioning and tuning must be performed by authorized personnel.
2. Mounting
Together with the unit is delivered the following equipment:
1. Suspension bracket and stoppers
2. Wall Bracket with vibration dampening gasket
3. Self-adhesive vibration damping
4. Accessories bag containing the necessary screws
5. 5 pcs. plugs for connecting additional equipment.
6. Key for opening the front hatch.

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Cooker
hood
Fresh air from
outside
Supply air to
room
Extract air from
room
Exhaust air
First, select how the unit should be mounted so that the piping system should be as easy as possible.
( Sketch over show AHU-700 BV/1)
(Sketch over show AHU-700 BH/1)
Cooker
hood
Exhaust
air
Extract air
from room
Supply air to
room
Fresh air
from outside

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The unit can also be placed on the floor. It is then important that there are placed at least 50 mm
insulation under the unit to prevent vibration to the building. If ventilation unit will be placed as the
sketch shows it must not be covered so that service is prevented.
If placed at the attic make sure that there
are at least 500 mm clearance over the front
hatch so there will be room for service.
2.1 Brackets and vibration gasket
Suspension bracket screwed on top of the unit as
shown.
Use 8 pcs M5 x 16mm, supplied with the unit
(Sketch over show AHU-700 BV/1)
Make sure that the edge protection gasket is placed on the wall bracket.

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To get the unit in right position use
the following brackets and screws. In
order to relief the hanger bracket on
the top it is important however also
to mount the bracket to be under
the unit. Ensure that the screws hit
the beams behind the wall if the unit
is to be hung on a light wall.
Use 6 pcs wood screws 5 x 40mm,
supplied with the unit, for each
bracket.
Mount the wall bracket with vibration gasket.
Be sure that the vibration gasket is intact.
2.2 Stopper brackets
To prevent the unit to be lifted out of the brackets should be installed two stoppers. Use two pcs of
wood screws 5 x 40mm, supplied with the unit, for each bracket. In order not to transmit vibration, it is
glued vibration material on these brackets

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2.3 Mounting of cooker hood
If kitchen exhaust hood is to be used together with the unit
If kitchen exhaust hood is to be connected
into the top of the unit, you must remove the
end cap in the top that is marked “COOKER
HOOD”
(Sketch shows AHU-700 BV/1)
(Sketch shows AHU-700 BH/1)