Elecro Engineering G2 Manuel D'installation page 9

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Circulation direction:
The primary and secondary circuits should be installed so water flows are
counter current i.e. The hot water from the primary circuit should flow in
the opposite direction to the water in the secondary circuit.
CAUTION
If the heat exchanger is not used during winter months it must be drained
to prevent frost damage.
NOTE: For Winterising / maintenance - it is recommended that the heat
exchanger is installed with isolation valves on both water input and out-
put sides of the primary and secondary circuits. This will allow the water to
be shut off on both sides and aid removal from the system, when
required.
Water quality
To prevent damage to your heat exchanger, the water quality must be kept
within the following limits:
Chlorine Content: Max 3mg/l (ppm)
Chloride Content: Max 150mg/l
PH: 6.8-8.0
Calcium Hardness: 200-1000mg/l (ppm)
Stainless Steel heater exchangers are NOT suitable for use with salt
Water.
Equipped Heat Exchanger
(optional equipped kit)
For Elecro heat exchangers purchased with the optional equipped kit,
these include the following items:
Primary Booster Pump (Primary heating circuit)
Flow Switch
Digital or analogue temperature control
If installing with the equipped kit it is essential to take note of the
flow direction indicated on the, non-return valve and
primary booster pump.
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