9
USER MANUAL
Operation
: Temporary modes (override)
en
Temporary modes (override)
The temporary modes are activated manually, except for the automatic bypass, and will tem-
porarily override the settings for the selected main mode. The temporary modes are automat-
ically stopped by a timer, but they can also be deactivated manually (except for the automatic
bypass).
Bypass mode opens the bypass damper, which directs the airflow around the heat exchanger.
The outdoor air will thus be supplied to the house without heat recovery. Bypass mode can
be activated in two ways:
• Automatic bypass
• Manual bypass
The automatic bypass opens/closes the bypass damper automatically when the conditions
for automatic bypass are met.
You can change the setpoints for min. outdoor temperature (Tmin) (default setting: 15°C) and
max. indoor temperature (Tmax) (default setting: 24°C) via PC Tool or the Dantherm HRC3re-
mote control.
If the conditions for automatic bypass are present, an open damper is indicated
by a constant light in the corresponding LED
!
NOTE
Mandatory conditions for allowing activation of automatic bypass:
•
Outdoor air temperature is at least 2 °C lower than the exhaust air temperature
•
AND the outdoor temperature is higher than the setpoint (Tmin)
•
AND the exhaust air temperature is higher than the set point (Tmax).
If one of the following conditions is met, the bypass will be deactivated:
•
Outdoor air temperature is higher than the exhaust air temperature
•
Outdoor air temperature is at least 2°C lower than setpoint (Tmin)
•
Exhaust air temperature is at least 1 °C lower than setpoint (Tmax)
Energy wasting:
If the bypass temperature settings are set too low, there is a risk that the unit will
open the bypass while the central heating system in the house is active.
If bypass/cooling is desired and automatic bypass is not active, the bypass can be activated
manually.
The bypass will open if the conditions for manual bypass are met within the defined time
period (default setting is six hours). The time period can be changed via PC Tool.
Short press – activates/deactivates manual bypass mode.
Active bypass mode (open damper) is indicated by constant light in the corre-
sponding LED.
NOTE: If bypass mode is activated, but the conditions for open bypass damper
are not present, the activated bypass mode will not be visible from the LED.
!
NOTE
Mandatory conditions for allowing activation of manual bypass:
•
Outdoor air temp. is min. 2 °C lower than the exhaust air temperature.
•
AND outdoor temp. is higher than setpoint (Tmin)
Introduction
Bypass mode
(cooling)
Automatic bypass
Manual bypass
Summary of Contents for HCV 300
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