Strebel S-WG 100, Инструкция по установке, эксплуатации и обслуживанию, Страница: 21 / 125

E09.012.246 Manual S-WG
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6 FLUE GAS AND AIR SUPPLY SYSTEM
6.1 General
The water heater has a positive pressure flue system. The available combined pressure drop for the inlet and
outlet system, for a single water heater,
is 200 Pa for the complete water heater range. For a multiple water
heater installation, always contact the manufacturer for advice.
Notice:

Install the horizontal flue components with an angle of 3° downwards in the direction of the water heater
(roughly equal to five centimetres for every linear meter). When not installed accordingly, it may result in
condensate building-up in the flue gas tube, eventually causing component failure.

Wall flue terminals are generally used up to 80 kW. Using these terminals with larger capacities will give
unpleasant large condensate clouds.

When using a wall terminal, there is the possible risk of ice building-up on surrounding parts/structures,
because the condensate will freeze. This risk should be taken into account during the design phase of the
DHW installation.
Note:
Because the flue gases can have a relatively low temperature, the water heater needs to have a high efficiency
approved stainless steel or plastic flue system. These materials should be usable for the applied pressure in the
flue gas system, be condensate proof and have a temperature class of
T-120.
6.2 Air supply
When an air supply duct is connected from the outside of the building to the water heater, the water heater will
operate as a room-independent water heater (closed water heater).
The air supply duct can be made of:

PVC / PPs

Thin-walled aluminium

Stainless steel
NOTICE: When the supply duct will be placed in a plant room with moist air (for example: greenhouses), a suffi-
ciently insulated duct must be used to prevent the possible condensation at the outside of the duct. It is not pos-
sible to insulate the internal air pipes of the water heater and therefore condensation at the internal air canals
must be prevented. The air supply duct needs to be protected against rain falling on top of the roof, so no rain
water will enter the water heater.
6.3 Flue terminal
Never use aluminium (containing) flue gas materials for this water heater
The flue terminal duct can be made of:

Stainless steel with T-120 gaskets

PPs temperature class T-120