Topvex FR800, FR1600, FR3800
Operation and Maintenance Instructions
Systemair Inc.
4
2.2.5 Hydronic Heater for FR800-3800
In units equipped with a hydronic
pre-heater
, the water coil is located next to the outside air connection. The
coil material is copper piping with a frame of galvanized sheet steel and aluminun fins. Both
pre-heater &
re-heater
are equipped with a frost protection sensor.
Both hydronic pre-heater and re-heater function outputs are modulated by the unit control in order to maintain
their respective air temperature set points.
For Topvex FR800-3800 units without pre-heater and/or re-heater, a heating water coil can be equipped
inside the unit. See “HWC-EPH Installation Instructions” manual (420353) for correct procedure.
In Topvex FR800-3800 all temperature sensors are mounted and wired inside the unit except for the supply air
sensor, which is delivered uninstalled with the unit and needs to be installed in the supply air duct externally
from the unit. See Installation instruction for more detailed information.
2.2.6 Electrical Heater for FR800-1600
In unites equipped with an electric
pre-heater
, the heating rods are located next to the outdoor air connection.
In units equipped with a built in electric
re-heater
(EL units only), the heating rods are located next to
the supply air connection. The heater material is stainless steel. Both electric heaters have automatic and
manual overheating protection. The manual overheat protection is reset by pushing the reset button on the
electrical (see figure 3).
Both electric pre-heater and re-heater function outputs are modulated by the unit control in order to maintain
their respective air temperature set points.
For Topvex FR800-1600 units without pre-heater, an electric heater can be equipped inside the unit. See
“HWC-EPH Installation Instructions” manual (420353) for correct procedure.
Danger
•
Make sure that the Main power supply to the unit is disconnected before performing any
maintenance or electrical work!
•
All electrical connections must be carried out by an authorized installer and in accordance with local
rules and regulations.
• Supply air sensor
• Extract air sensor
• Outdoor air sensor
• Exhaust air sensor
• Extra unit sensor
1
1
. Only if pre heater is installed
Fig. 2 Reset of the manual overheat protection in Topvex FR800-1600
