VEAB VFL2-Ex, Installation,Operation And Maintenance Instruction

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VFL2-Ex, VTL2-Ex, VRA2-Ex
GB
1.0 General
1.1 All work is to be done by qualified and authorised personnel.
1.2 Handle the equipment carefully.
1.3 The heater is to be stored in dry conditions, relative
humidity <55%, temperature >15°C.
1.4 The ambient temperature for the heater when in use is
min. -50°C / max. +40°C.
1.5 Before installing the unit, a visual check for transport
damages must be made.
1.6 The heater must be secured to the ventilation duct.
1.7 If any changes are made to the product without the
consent of VEAB Heat Tech AB, all the certificates of
approval becomes invalid.
1.8 The temperature limiter capilary tub are fixed with a spring
coil around the heating element. Monitoring heating element
temperature.
The thermostat are fixed in a tube. Monitoring outlet air
temperature.
1.9 This appliance can be used by children aged from 8 years and
above and persons with reduced physical, sensory or mental
capabilities or lack of experience and knowledge if they have
been given supervision or instruction concering use of the
appliance in a safe way and understand the hazards involved,
Childen shall not play with the appliance. Cleaning and user
maintenance shall not be made by children without supervision.
2.0 Fitting
2.1 Min. airflow rate through the heater is stated on the
type lable on the lid. Outlet air temperature must not
exceed 40°C.
2.2 When heat is required, heating elements for power step 1
shall always be energized.
2.3 The heater may be mounted in a horizontal or a vertical
duct, the junction box is to be placed on the side or upwards.
2.4 The minimum distance from or to the nearest duct bend,
valve, filter, etc., should correspond with the diagonal
dimension of the heater i.e. the from corner to corner in the
duct part of the heater. If this is not the case there is a risk
that the air flow through the heater will be uneven, which
may activate the temperature limiter.
2.5 The air flow direction through the heater must go in the
same direction as the arrow on the cover of the heater.
The temperature limiter and safety thermostats shall always
be placed last in the air flow direction.
2.6 The settings for the surface-mounted temperature limiter
with manual resets must never be changed.
For the T3 temperature class, the temperature limiter is
factory set to 150°C.
2.7 The setting for the thermostat with automatically reset
must never be higher than 60°C.
3.0 Electrical connections
3.1 Installation has to meet the requirements of any approved
standard.
1. Open the junction box
2. Connect the supply cable to the terminals in each step,
terminal earth and terminal 1-6 for thermal protection.
Optional: Heater equipped with anti-condensation heater,
connect the supply cable to the terminals 7 and 8.
3. Close the junction box.
3.2 The duct heater must be installed so that there is an
interlock between the temperature limiters and the
thermostat that are fitted to the heater, as well as the fan/air
flow that flows through the duct heater. The power supply
to the elements should consequently not be switched on
unless the associated fan starts or if the temperature limiter
has tripped. See wiring example, appendix 1 page 10.
When heat is required, heating elements for power step 1
shall always be energized. The temperature limiters are
mounted on power step number 1. If the heater has more than
one power step, power step number 1 shall always be the first
to be energized when the heater is required for operation, and
the last to be switched off when the power is turned off.
If the duct heater has more then one power step and the first
power step will be regulated by a thyristor, the heater must
also be equipped with temperature limiters on power step 2.
3.3 A multi-pole switch shall be installed in the fixed installation.
3.4 The control equipment shall have a separate sensor which
automatically limits the temperature of the outlet air from
the heater to 40°C.
3.5 The heater’s data for voltage, power and temperature limiter
is stated on the wiring diagram that is on the inside of the
cover to the duct heater as well as on the specification plate
on the outside of the cover.
3.6 Check the torque for all terminal blocks before using the
heater. The torques are specified on the wiring diagram.
This must also be done, at least once, after the heater has
been in use for 6 months. This must also be done in con-
nection with other periodic maintenance on the equipment.
Max cross-sectional area in terminal block
Terminal block Max cross-sectional area
1492-J4 & JG4 4mm²
1492-J6 & JG6 6mm²
1492-J10 & JG10 10mm²
1492-J16 & JG16 16mm²
1492-J35 & JG35 35mm²