400895 Topvex FR Operation and Maintenance Instructions

Topvex FR800, FR1600, FR3800 Operation and Maintenance Instructions
Systemair Inc.
3
2.2 Description of Internal Components
2.2.1 Supply and Extract Air Fans
The fans have external rotor motors of EC type which can be steplessly controlled individually 0 - 100%. It
is possible to program the speed in 2 steps (normal/reduced) 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 (chapter 5).
2.2.1.1 Pressure Transmitter and clogged lter alarm
Twopressuretransmittersmaintaintheairowataconstantlevel(CAV)bymeasuringthedifferentialpressure
over the inlet cone of the fan impellers. The pressure transmitters are installed from factory in all units. An
accessorykitisavailabletoconverttheunittoaVAVinordertomaintainaconstantpressureintheduct.
See“VAVInstallationInstructions”manual(420300)formoreinformation.
Inaddition,thepressuretransmittersmeasuresthedifferentialpressureoverthesupplyandextractairlters.
When the pressure drop reaches the set value an alarm is triggered in the main controller. The differential
pressure can be set between 0.2 in.wg. (40Pa) and 1.2 in.wg. (300 Pa). The pressure switch is preset from
factory to 1.0 in.wg. (240 Pa).
2.2.2 Outdoor and Extract Air Filters and Pre-Filter**
TheltersareofbagltertypewithlterqualityMERV13fortheoutdoorairlterandMERV9fortheextract
airlter.Theltersneedtobereplacedwhendirty.Newsetsoflterscanbeacquiredfromyourinstalleror
wholesaler.
Thepre-lter(s)isofascreentypeandcanbecleanedbyusingsoapwaterorcompressedair.Itcanbe
acquiredfrominstallerorwholesaler.
2.2.3 Heat Exchanger
TopvexFRmodelsareequippedwithahighlyefcient,beltdriven,rotatingheatexchanger.Requiredsupply
air temperature is therefore normally maintained without adding additional heat. The operation of the heat
exchanger is automatic and depends on the set temperature.
The heat exchanger is removable for cleaning and maintenance. (Chapter 5)
2.2.3.1 Rotor Motor
The rotor motor drives the exchanger rotor with a constant rotational speed as long as there is a heat demand.
Themotoriscontrolledbyanon/offcontrolsignal.(pos.6gure1).
2.2.3.2 Rotation Sensor
A sensor registers the rotation of the heat exchanger rotor. It’s connected to the main regulator which gives
analarmiftherotorstopswhilethereisaheatdemand(pos.11gure1).
2.2.4 Temperature Sensors
5 temperature sensors (PT1000) are included in the unit from factory:
** (only whit units with pre-heater)