Swegon CASA R120, Instructions For Installation, Operation And Maintenance

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3.6 Installation and service
The menu is can be opened by entering code 1234�
3.6.1 Sensor fault
Contact a service company�
3.6.2 Alarms/Service reminder
The service reminder appears on the screen at six-month
intervals� On completed service, the reminder is set to
zero from the menu and a new period of six months
begins� The time period can be altered from the Func-
tions menu�
Alarms for malfunctions are displayed in the display�
3.6.3 Clock
”On” or ”Off”�
The clock is displayed in the start menu�
3.6.4 Temperature
”On” or ”Off”�
The supply air temperature control function is displayed
in the start menu� Select ON in order to use the function
for setting the supply air temperature, otherwise select
Off� (The models with reheat�)
3.6.5 Measurements
Depending on the accessories connected, the follow-
ing can be measured: the carbon dioxide content (CO
2
),
temperature, pressure differential, the speed of the fans
and relative humidity (RH)�
3.6.6 Control functions
Carbon dioxide content (CO
2
), supervision (DDC) or
timer can be selected as a control means�
3.6.7 Fan speeds
N.B.! The Summer night cooling function should be
deactivated whenever you change the fan speeds.
One of five fan modes (1–5) can be selected for each
operating mode (Away, Home, Boost etc�)�
The various fan mode speeds (expressed as a percent-
age: 10–100) can then be selected (separate for supply
air and extract air)�
3.6.8 To switch off the unit
The ventilation unit fans, the heat exchanger and an air
heater, if fitted, are stopped� The circuit card is how-
ever still energised and the settings are preserved in the
memory�
3.6.9 Factory settings
All settings except the fan speeds are reset to factory
values�
3.6.10 Actuators
It is possible to select settings for duct equipment, the
valve actuators or circulation air regulation�
3.6.11 Functions
• Select ON as the value for Low pressure compensa-
tion, e�g� if the cooker hood has a differential pres-
sure guard in the extract air duct of the cooker hood
for this function, otherwise select OFF�
• Select ON as the value for Service reminder, if the
function is to be used, otherwise select Off� The time
interval (6 months) can be changed�
• Select ON as the value for Summer night cooling, if
you wish to select the function in the menu, other-
wise select Off�
• Select On as the value for Heating, if an air heater
is installed, otherwise select Off� The limit value for
high temperature is 50 °C� The temperature can be
changed� Supply air fan ctrl is selected as the control
means, this can be changed to Room controlled�
• Select On as the Fireplace switch function setting,
if a fireplace switch has been installed, otherwise
select Off� The fireplace switch function decreases the
extract air fan speed and increases the supply air fan
speed� The freeze protection works in the reverse
manner: It stops the supply air fan and only allows
the extract air fan to run�
• Select On as the value for Boost, if a boost timer or a
presence detector is installed, otherwise select Off�
3.6.12 Electric air heater
If the ventilation unit has an air heater for reheating,
select the ”In operation” setting� The air heater is not
activated when the outdoor air temperature is above 11
°C� The temperature limit can be changed�
3.6 Installation and ser-
vice
(code 1234)
• Alarm/Service reminder
• Time switch clock (timer)
• Temperature
• Measurements
• Control functions
• Fan speeds
• Switch off
• Factory settings
• Controller
• Functions
• Air heater
timer, with the Away–Home–Boost fan speeds� Manual
operation from the control panel bypasses (overrides)
the weekly timer functions�
3.5.10 Ventilation unit model
Shows the model of the ventilation unit�
R120.211112
Swegon reserves the right to alter specifications. www�swegon�com 15