Trox Technik WL Série Instructions De Montage page 3

WL
GB
Water connecting
When connecting a heater to the water system, the following
things should be considered:
1. The heater must be connected with clamping ring
connectors.
2. The connecting pipes from the heat exchanger must
under no circumstances be subjected to twisting or
bending stresses when assembling the pipe connectors
etc. Use suitable tools to counteract the twisting/
bending moments during assembly.
3. Ensure that forces due to expansion in the system and
the intrinsic weight of the piping system itself do not
put loads on to the heat exchanger.
4. The water inlet should normally be connected to the
lowest pipe connector in order to facilitate venting of
the heat exchanger. A venting valve should normally
be installed near the heat exchanger or at the highest
point in the system.
5. The heater must be connected in such a way that the
system is easy to empty in the event of repair work,
a longer operational stop, or when there is a risk of
freezing, etc.
6. Immediately after the system has been filled with water,
the duct heater and its connections must be checked for
water leaks. Leaks can cause water damage.
Operational data:
Max. operating temperature:
Max. operating pressure:
WARNING!!
If the water in the heat exchanger freezes, then it can burst, if this
is the case water may leak from the system and cause water
damage. Therefore, when there is a risk of freezing the heater
must be protected by a freezing sensor which shuts down the
system fans, shuts any outside air valves, opens the water valve
to increase the water circulation through the heat exchanger, and
activates the alarm circuit (if there is one).
Cleaning
The heat exchanger must be cleaned regularly in order to retain
the best performance from the heater. The cleaning interval
depends entirely on the cleanliness of the air and how the filter
and remainder of the system are maintained. The heat exchanger
is readily accessible for cleaning when the cover on the heater is
removed. First, the air entry side of the heat exchanger is cleaned
with a brush and then the whole heat exchanger can be cleaned
with compressed air, water or steam. The dirt is blown or washed
away in a direction away from the exit side towards the entry side.
Cleaning is facilitated by using a mild detergent (check first that
the detergent does not have a detrimental effect on copper and
aluminium). Be careful not to damage the thin fins on the heat
exchanger.
150°C
1,0 MPa (10 bar)
Mounting
The heater is designed to be inserted into standard spiral ducting
and is fixed to the ducting with screws.
Ensure that the ends of the connecting tubes are deburred before
connection.
The heater should not be fitted too close to a fan outlet or a
bend in the ducting because then there is a risk that the air flow
through the heat exchanger is uneven which can result in lower
efficiency.
An effective filter is recommended in the system to reduce main-
tenance work. See under the heading Cleaning.
Duct heater model
The duct heater can be fitted in a horizontal or a vertical duct
with optional direction of airflow. To facilitate venting of the heat
exchanger, the unit should be fitted with the longitudinal tubes
horizontal. The heater is normally fitted after the fan. However
it can be fitted before the fan, but then a check must be made
that the fan motor and other components are approved for the
elevated temperature after the heater.
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