Topvex TR800, TR1300, TR1800, TR4000 Operation and Maintenance Instructions
Systemair Inc.
5
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.
2.3.1 Electrical Connection Box Topvex TR800-1800 EL
Topvex TR800-1800 are equipped with a built in controller and internal wiring (Figure 3).
Note:
For pre-heater components, please refer to the “Pre-Heater installation instructions (420353).
Fig. 3 Electrical components Topvex TR800-1800 EL
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
8 Automatic fuse (AS1)
9 Automatic fuse for heater (AS2)
10 Automatic over heat protection reset (EL units) (OT1)
11 Manual over heat protection reset (EL units) (ET1)
12 TTC El heater control
13 Fuse holder F1 and F2
2
12
10
11
6
8
7
9
1
3
4 5
Table 2: Description of electrical components Topvex TR800-1800 EL
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