Preheater Topvex SC, Topvex TC Installation instructions Document in original language | 247019 · A001 GB
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Contents 1 2 3 4 Warnings.......................................................1 General .........................................................1 Installation.....................................................1 3.1 Outdoor air sensor ..................................1 3.2 Wiring diagram ......................................2 How to set up the function ................................3 4.1 Activation.............................................3 4.2 Configuration ...................................
Warnings | 1 Warnings Danger • Make sure that the mains 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 General A preheater is available as an accessory for Systemair Topvex SC, Topvex TC.
| Installation 3.2 Wiring diagram 9 0V 10 T27 AO4 REF T84 T74 ACCESS REF 11 PE L3 PE L3 L2 CB 250-90-3-MQXL L1 CB 315-90-3-MQXL CB 400-120-3-MQXL L2 12 DI6 L1 N 400V 3N~ UI4 OS * Fig. 2 Wiring CB T74 0V T27 ACCESS REF AO4 DI6 G0 Y 1 RB 50-25-12-MQXL RB 50-30-17-MQXL RB 60-30-17-MQXL RB 60-40-21-MQXL RB 60-50-27-MQXL PE L3 PE L3 L2 L2 L1 L1 N 7 2 400V 3N~ 8 T84 2 REF UI4 OS * Fig. 3 Wiring RB * See chapter 3.
How to set up the function | 4 How to set up the function Log in with service mode using password 0612. Overview: Service 0612 Login Step by step: 1. Open the log in window 2. Select service from drop down list 3. Type in password 0612 4. Press Login. 4.1 Activation Activate the Preheater function by selecting Yes as Preheater in the list of available functions in the Configuration > Functions > Function activation menu.
4 | How to set up the function 4.2 Configuration Configure the preheater and its running mode in the Configuration > Functions > Preheater menu. Note: Select When defrosting if preheater is used to maintain supply air temperature at desired level only during by-pass defrosting (Pressure monitoring). Select Unit running if preheater is used to prevent icing in the exchanger or to support section defrosting or heating capacity in very cold climates.
How to set up the function | 4.3 Allocation Configuration > I/O allocation settings Select I/O (in-/output) placement for the connected temperature sensor and control/feedback signals to/from the electric heater in the Configuration > I/O allocation settings submenus. Caution Do not use the same in- or output for several functions.
6 | How to set up the function Step by step: 1. Select Configuration from the navigation icons 2. Select I/O allocation settings 3. Select Analog inputs 4. Allocate Intake air temperature to AI4 5. Allocate Preheater temperature to UI1 on Controller 6. Go back to I/O allocation settings (use the navigation path Configuration > I/O allocation settings) 7. Select Digital inputs 8. Allocate Feedback preheater to DI6 9. Select Feedback preheater 10.Adjust Contact function to Normally closed 11.
How to set up the function | 4.4 Operation settings Data & Settings > Temperature control > Preheater Adjust the preheater temperature set point in the Data & Settings > Temperature control > Preheater menu Note: When defrosting: To maintain a supply temperature during by-pass defrosting the preheater need to compensate for the missing heating capacity. E.g. if the desired supply air temperature is 22 °C, but the heating capacity is only 10 °K the preheater setpoint need to be set to 12 °C.
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