Swegon CASA W9 Smart, Installation, Commissioning And Maintenance Instruction

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W9 Smart
All rights to changes reserved. 2021-09-23
1: Group electrical distribution box | 2: Electrical equipment cubicle | 3: Exhaust air | 4: Outdoor air | 5: Power supply: 230 V, 16 A
with plug-in connection | 6: The damming height of the water trap, 100 mm | 7: Supply demarcation of the ventilation unit | 8:
General ventilation | 9: Supply air | 10: Modular cables with RJ9-connectors | 11: Control panel
7.7.2 W9 Econo
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DESCRIPTION OF FUNCTIONS
CONTROL FUNCTIONS:
The ventilation unit can be operated from a separate Smart control panel or a Smart cooker hood, or remotely via the Modbus field bus or by DCC control. When the ventilation unit is controlled from
the cooker hood in the Home/Away/Boost modes and for local extraction, the time can be set to 30, 60 or 120 minutes. The supply air temperature can be set from the control panel or via Modbus. If
necessary, reheating can be disabled by turning the thermostat to the zero position.
Summer operation: The outside air bypasses the heat exchanger when the room temperature is higher than its set temperature (e.g. T3) and when the temperature of the outside air (T1) is higher
than 14 °C (factory setting) and is lower than the room temperature setting. The fans run at the set speed or are controlled by the control panel to the defined boost speed for summer mode.
INTERLOCKINGS AND SAFETY FUNCTIONS:
– Freeze protection for waterborne air heaters The ventilation unit will stop if the temperature of the return water from the air heater drops below a limit value. The outdoor air and extract air ducts
are fitted with shut-off dampers with spring return, whose 24 V control voltage is taken from the circuit-board. Shut-off dampers and damper motors are not included in the equipment delivery.
– The air heater for preheat is equipped with an automatic thermostat TZA1 and a thermostat TZ02 with manual reset (set value 90 °C).
– The fans have automatic overtemperature protective devices.
– The ventilation unit is equipped with an automatic defrost system that prevents the heat exchanger from freezing by enabling the preheater and if necessary by changing the fan speed.
IF THE SAFETY EQUIPMENT TRIPS:
– If an overheating protection with manual reset trips, locate and correct the fault; then press the reset button inside the ventilation unit.
– The automatic overheating protections of the fans will reset themselves when the temperature has dropped below the setting value.
REMOTE OPERATION: Study the ventilation unit manual and the list of parameters for Modbus.
SYMBOL DESIGNATION EXPLANATION
TC1 MANUAL TEMPERATURE CONTROLS Manual temperature control for the post heating air heater, factory settings 17 °C
TV1 SELF-DRIVEN THERMOSTAT VALVE Thermostat valve on the air heater for post heating
T1 TEMPERATURE SENSOR Temperature sensor, outdoor air
T3 TEMPERATURE SENSOR Freeze protection for water-heated air heater for post heating
T4 TEMPERATURE SENSOR Temperature sensor, supply air.
T5 TEMPERATURE SENSOR Temperature sensor, exhaust air
T6–T9 TEMPERATURE SENSOR Connected to SET, the functions are determined through the programming of SET (accessory)
TZ02 OVERHEATING PROTECTION Overheating protection with manual reset
TZA2 OVERHEATING PROTECTION Automatic over temperature protection
SET CONNECTION UNIT Connection unit for Smart control signals (accessory)
SEC EXPANSION CABLE IO expansion cable, accessory
SMBG MODBUS MODULE Modbus expansion module, accessory
F1 + F2 FILTER Supply air filter
F3 FILTER Extract air filter
HR HEAT EXCHANGER Heat exchanger
SF1 FAN Supply air fan
EF1 FAN Extract air fan
SD1 DAMPERS Bypass damper summer time
SD2 DAMPERS Shut-off dampers, accessory
SK AIR HEATER/COOLER Electric air heater, accessory
LP AIR HEATER/COOLER Air heater accessory
VP AIR HEATER/COOLER Air cooler, accessory
RH + T SENSOR Humidity and temperature sensor
RH + CO2 SENSOR Humidity/carbon dioxide sensor, accessory
RH + VOC SENSOR Humidity/VOC sensor, accessory