Product description |
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Product description
4.1 Supply and extract air fans
The fans have external rotor motors of EC type which are steplessly controlled individually by setting the control signal
to a fixed value. It is possible to program the speed in 3 steps (high/normal/low) depending on the programming of the
week schedule. The motor bearings are life time lubricated and maintenance free. It is possible to remove the fans for
cleaning, see chapter 7 for more information.
4.2 Pressure transmitter fans/filters
Two pressure transmitters are installed, each of the sensors has two functions. One function is to measure the differen-
tial pressure over the inlet cone of the fan impellers to maintain the airflow at constant level (CAV function as standard).
The other function, is to measure the differential pressure over the supply and extract air filters. When the pressure
drop reaches the set value, an alarm is triggered in the main regulator, which indicates that the filter needs to be
replaced.
4.3 Supply and extract air filters
The filters are of bag filter type with filter quality ePM1 60% (F7) for the supply air filter and ePM10 60% (M5) for the
extract air filter. The filters need to be replaced when polluted. We recommend ordering original filters from Pacific
Ventilation.
4.4 Heat exchanger
Topvex SC, TC models are equipped with a counter flow heat exchanger and a by-pass damper. The operation of the
by-pass damper is automatic and depends on the set temperature or if defrosting is in operation.
For defrosting a pressure transmitter is installed which measure the differential pressure over the heat exchanger.
4.5 Temperature sensor
4 temperature sensors (PT1000) are included in the unit from factory. The sensors are as follows:
• Supply air sensor
• Extract air temperature sensor
• Outdoor air temperature sensor
• Exhaust air temperature sensor
• Efficiency temperature sensor
The supply air sensor is loosely delivered with the unit and needs to be installed in the supply air duct externally from
the unit. See Installation instructions for more information.
4.6
Water heating coil
In units with built in water heating coil the hot water coil is located next to the supply air connection. The hot water coil
can be either HWL (hot water coil, low power) or HWH (hot water coil, high power). The coil material is copper piping
with a frame of galvanized sheet steel and aluminium fins. The coil is equipped with venting and immersion sensor for
frost protection.
4.7
Electric heating coil
In units with built in electrical heater the heating rods are located after the supply air fan in the airflow direction. The
material is stainless steel. The electrical heating coil has both automatic and manual overheating protection. The manual
overheat protection is reset by pushing the red button on top of the electrical heater frame (figure 9). The electrical
heater is mechanically interlocked by an air flow sensor in the supply air. The power demand of the electric heating coil
is controlled by the main regulator, which controls the heat steplessly by a TTC triac control according to the selected
control function that is set in the control panel.
214959 | A002
Summary of Contents for Topvex SC
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