Ventilair Comair Aquacom, Manual, Page: 15 / 30

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the and button all messages can be
viewed. By pressing when 'rem. errors?' is
shown, all saved error messages will be deleted.
Error messages will be shown as following:
Fx F = yy dd.mm
Fx
Message 'x' in which x is the number
of the displayed error message.
F=yy Error code is yy. For more information
on these error codes, see section 5.
dd.mm The date on which the error occurred.
4.2.2 Setting the external fan
If the Aquacom is applied, the supply fan is
supposed to be assigned more power, unless the
external fan is constant volume controlled. This is
necessary because the Aquacom causes extra
resistance in the supply air pipe. Also make sure
that a possible bypass temperature is set in such
way that during summertime the air cooled by the
Aquacom does not flow into the pipe system. This
could lead to condensation in the pipe system and
this could cause mold. This problem especially
occurs when the bypass temperature is set lower
than the factory setting.
4.3 Operation of the control unit
The control unit controls the temperature by
turning the pump off and on. It also has a function
to protect the ground during winter operation.
Furthermore it will protect the pump from getting
stuck.
4.3.1 Operation of the control unit during summer
operation
If the measured outside temperature is higher than
the temperature set by T summer, the pump will
be enabled. If the temperature after the heat
exchanger will approach the temperature set by T2
Aquacom, the pump will start switching on and off.
Every three minutes the pump will be activated for
X percent of the time.
The percentage X for the time the pump is active
each three minutes is calculated by the following
formula:
X =15% +(100/Pzomer * 1,8) * (T na Aquacom - T2
Aquacom)
4.3.2 Operation of the control unit during winter
operation
If the measured outside temperature is lower than
the temperature set by T winter, the pump will be
enabled. If there is only a small amount of heat
required, the pump will start switching on and off.
Every three minutes the pump will be activated for
X percent of the time.
The percentage X for the time the pump is active
each three minutes is calculated by the following
formula:
X
= (100%/Pwinter)*(Twinter-Tbuiten) +
(100%/16)*(Twinter-T2 na Aquacom)
4.3.3 Ground protection
If during winter operation the temperature after
the heat exchanger is one degree lower than the
outside temperature, there is no heat absorption
from the ground. The pump will be disabled for
five hours so the ground can warm up again.
4.3.4 Pump protection
To prevent the pump from getting stuck when it is
not enabled for longer periods of time, pump
protection is added to the control unit. This pump
protection makes sure the pump will make sure
the pump is enabled at least two minutes each
seven days.
4.4 Maintenance by the installer
NOTE: Always remove the plug from the
wall socket before servicing the unit! Write
down all maintenance operations in appendix III.
We recommend to commit the following major
maintenance of the heat recovery unit every two
years:
-
Check the fins of the heat exchanger for
damage.
- Cleaning heat exchanger block.
- Cleaning condensation drain.
- Check the pump operation.
- Check (and if necessary repair) the electrical
wiring.
- Check the operating pressure.
- Check glycol content.
Besides this, we recommend to clean the
ventilation pipe system every six years.
4.4.1 Pressurizing
If when reading the manometer the operation
pressure (between 0.8 and 1 bar) appears to be
incorrect, the system needs to be replenished. To
do this, follow the next steps:
-
Use a garden hose from the nearest water
connection
- Connect the garden hose to this water
connection