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Condensate
Drain
Wall installation: The pipe connections for water should
always be horizontal, to enable a drain/venting point to
be fitted. The heater can be tilted forward slightly, but
the heater may NOT hang askew.
Place the heater in such a manner that the return
connection (cold water) is at the lowest point. It is im-
portant to place the drain/venting point in the pipework
near the heater.
Ceiling installation: Again the pipe connections to the
heater should be horizontal, to enable drain/venting of
the internal tubes.
To avoid draughts place the heater high enough
(minimum 2.5m). If necessary use our 4-way downflow
plenum, use of a plenum will reduce the throw by a fac-
tor of 4. See Fig. 1.
Fig. 1
The discharge grille, 4-sided discharge plenum and the
vertical louvres are easy to adjust to the desired airflow
direction.
Fig. 2
Make sure that the exchanger is not damaged and that
the heater discharge is not blocked, and the supply air
fan has no restrictions. Make sure that there's sufficient
circulation of air within the space without the airstream
being considered a draught.
Heaters fixed to the wall should always blow in the
direction of the cooler areas.
3.2 Water connections
Connections for hot water supply and return (2 x ¾" or
2 x 1") are marked with a red and a blue sticker. Red is
water supply and blue is water return.
Do not swap these connections,as this will affect the
heat output.
The SWH-LT is not provided with a vent/drain . This
should be fitted as part of the pipework installation and
should be as close to the heater connections as possible.
Do not over tighten the pipework on the heater
connections, this will result in leaks!
Warning:
To prevent damage to the heater, hold the
WARNING!
water connections with a wrench to avoid twisting the
welded parts of the connections.
Do not apply
excessive force!
Internal welds may
break and cause leaks.
4. Electrical connection
4.1 230Vac supply
The installation must comply with all applicable local
and/or national standards.
There should be a suitable mains electrical isolator with
a main fuse.
There is an electrical diagram further on in this guide.
The supply is 230Vac (50 Hz) with earth.
Isolation switch or power plug
The heater must be equipped with a 230V isolation
switch or power plug. This switch should disconnect
liveand neutral (not earth) and have a minimum 3mm
contact opening. Switches or power plugs must be
accessible at all times.
4.2 General functioning of the unit
The SWH-LT is simply described as a radiator with a fan
at the rear. If there is hot water flowing through the
radiator, and the heater is on, the heater will blow warm
air. But when hot water is flowing through the radiator
and the heater is off, the heater will not discharge warm
air.
5
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