VEAB Heat Tech AW 12s-62s, Installation And Maintenance Instruction

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AW 12s-62s, 12a-62a
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Water connections for the AW-s and the AW-a
ATTENTION! Carefully inspect the whole system for leaks after connecting the water pipes. A leak may cause
damage that is expensive to repair.
1. The fan heater must not be connected to hot mains water or steam. The highest temperature and pressure allowed is
indicated on the identification plate attached next to the pipes.
2. The capacity, water temperature, flow and pressure drop are given in the tables for each heater size, see appendix D.
3. The fan heater must be connected so that the battery may be drained in the event of shutdown. This is due to risk of
damage in the event of temperatures below zero.
4. An air purge valve must be installed on the heater outlet pipe or centrally in the system.
5. When tightening connections on pipes and valves these must be held in such way that the tightening torque is not
transferred to the inlet and outlet pipes.
6. The pipe system connected to the heater must be suspended in such a way that it does not put any load on the inlet
and outlet pipes.
7. The water inlet is connected to the heater’s lower pipe and the outlet is connected to the heater’s upper pipe, as shown
by the arrows in photo 20. Connections for the AW 12 - AW 22 are 22 mm dia. and for AW 42 - AW 62 28 mm dia.
Compression couplings are recommended.
If you are using soldered connections, the pipe must be cooled near the soldering point (using wet rags, freezer bags
or compressed air) so that the casing grommet (arrow A, photo 14) is not heated above 100 °C. In order to reduce the
amount of heat needed, you may remove the support sleeve before soldering.
Photo 20 Photo 21
8. Support sleeves must be used together with compression couplings because the copper tubing is soft-annealed. Check
that the support sleeve is fully inserted, as shown by arrow B, photo 21.
Fit the compression coupling and tighten in accordance with the manufacturer’s instructions.
B
A