400895 Topvex FR Operation and Maintenance Instructions

Topvex FR800, FR1600, FR3800 Operation and Maintenance Instructions

Systemair Inc.

2.3 Internal components Electrical connection box

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.

Fig. 3 Electrical components

Table 2: Description of electrical components

Note:

Electric heater section. (Present in EL units

only)

Position Description

1 Controller E-28 (UC)

2 Transformer208-230/24VAC(TR24)

3 Terminals for internal and external components (TB3)

4 Terminals for internal wiring (TB2)

5 Terminals for main power voltage to the unit (TB1)

6 Contactor (K1) On/Off rotor motor

7 Contactor (K3) On/Off control of EL heater (EL units only)

8 Automatic fuse (AS1)

9 Automatic fuse for heater (AS2) (EL units only)

10 Automatic over heat protection reset (EL units only) (OT1)

11 Manual over heat protection reset (EL units only) (ET1)

12 TTC EI heater control

13 Fuse holders F1 and F2

Note:

Forpre-heatercomponents,pleaserefertothe“HWC-EPHInstallationInstructions”manual(420353).

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