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SWX EX12, SWX EX22
Water connections for the SWX EX
ATTENTION!
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, next to the connection pipes.
Caution! Maximum temperature for inlet water is +125°C.
2. The capacity, water temperature, flow and pressure drop are shown in the tables for each heater size, see appendix A.
3. The fan heater must be connected so that the coil may be drained during a shut-down, in the event of freezing temperatures.
4. An air purge valve must be installed at the heater outlet pipe or centrally in the system.
5. The piping connected to the heater must be suspended in such a way that it does not put any strain on
the inlet or outlet pipes.
6. Connect the water supply pipe to the lower pipe on the heater and connect the outlet pipe to the upper pipe, as shown by
the arrows in photo 6. The connection diameter is 22 mm on SWX EX12 and 28 mm on SWX EX22.
Clamp-ring couplings are recommended. If 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 7) is not heated above 150 °C.
In order to reduce the amount of heat needed, remove the support sleeve before soldering.
Photo 6
7. Support sleeves must be used together with clamp-ring couplings since the copper pipes are soft annealed. Make sure that
the support sleeve is correctly inserted, as indicated by the arrow B in photo 7.
Install the clamp-ring coupling and tighten in accordance with the manufacturer's instructions.
When tightening connections on pipes and valves, these must be held in such way that the tightening torque is not transfer-
red to the fan heater inlet and outlet pipes.
Carefully inspect the whole system for leaks after connecting the water pipes.
A leak may cause damage that is expensive to repair.
B
B
Photo 7
14
A
A
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