Bio Green HMT-A 040-075 Mode D'emploi page 10

Heating mat HMT-A
5. Installation
When used in damp rooms (e.g. greenhouse), the appliance may only be operated from power
outlets protected by Earth Leakage Protection. Before using the appliance for the first time,
ensure that this is the case where the appliance is to be used.
Ensure that the heating mat is not connected to mains before or during installation. When installing
the thermostat, ensure that it is positioned such that it cannot get wet (e.g. dripping condensation
water, open skylight etc.) or could possibly fall into water.
Lay the connecting cable in a manner as not to pose a stumbling hazard, as not to be crushed or as
not to come into contact with hot surfaces. Use only extension leads matched to the power rating of
the appliance and complying with the applicable safety regulations.
Set up:
a) Spread the heating mat fully.
Note: Always fully unroll the
mat, to avoid risk of damage.
b) Cover the heating mat with a
plastic sheet for additional
protection.
c) Cover the heating mat with a
3 cm layer of sand. This has
the advantage that the sand
will absorb any excess water.
The water evaporates in the
warm sand and passes by the
green leaves as warm, moist
air.
d) The position of the thermostat probe
Ensure that the full length of the thermostat probe (the 12 cm long, wide end) is inside the soil.
Caution: The capillary tube of the probe must never be kinked since this would falsify the
temperature reading.
- For seed trays, the thermostat probe should be positioned in the root area to achieve optimal
temperature regulation.
- If different soil temperatures are required in plant pots, the pots requiring the highest
temperature should be placed directly on the heated surface. For plant pots requiring less heat,
the gap between the pot and the heated surface should be increased to lower the soil
temperature. Use a thermometer to measure the soil temperature.
e) Using the heating mat for plant overwintering
If the heating mat is used for plant overwintering, set up the appliance on the floor of the
greenhouse as described in a) to d). Be sure to use a min. 5 cm thick polystyrene board for
insulation against the ground. It is also sensible to build a "polystyrene box" around the
polystyrene board arrangement and relevant fastening material, filled with 4-5 cm sand. This sand
box with the heating mat inside serves as a heat reservoir.
By covering the sand with a metal sheet or a glass top, the pressure of the plant containers placed
on it is distributed evenly. Even pressure on the sand increases the storage capacity.
A black cover plate creates additional heating through heat absorption from sunlight. Depending
on the size of the heat reservoir, the system still provides 1-2 days of stored heat in the event of a
power failure.
Heating mat,
Heating mat, covered covered with Thermostat probe
with plastic sheet
plastic sheet
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Thermostat probe
Digital thermostat
Digital thermostat
(-50°C to +99° C)
(-50 bis +99°C )
C/H
ON/
OFF