Installation manual

Coopra Advanced Heating Technologies Installation manual 40 EN
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2.3. Water and gas connections
1 = Heating return pipe connection
2 = Heating flow pipe connection
3 = Gas connection
4 = Draconin connection
2.3.1. Gas connection
• Connect the gas pipe to connection (3).
• Install the gas pipe stress free.
• Include an approved stopcock in the pipe.
• Carefully blow the gas pipe clean.
2.3.2. Central heating water connections
• Connect the central heating return pipe to connection
(1). The central heating return pipe (1) must be fitted
with a suitable expansion vessel. The size of the
expansion vessel must be determined on the basis
of the central heating water temperature and the total
water content the installation contains.
• Connect the central heating flow pipe to connection
(2).
• A differential bypass valve must be installed on
plants where it may happen that various radiators
are simultaneously excluded from the circuit because
of closure of control or zone valves.
• Install a filling and draining device in the central
heating system. Do not use the overflow valve as a
drain. The overflow valve is a safety valve that
ensures that the system is not subjected to a too
high pressure (max 3.0 bar).
• Stopcocks must be fitted in the central heating flow
pipe (2) and the central heating return pipe (1).
• If it may be expected that the central heating water will
be severely contaminated by under floor heating, fitting
is a 2 kg dirt filter in the return pipe is recommended.
Coopra cannot give a guarantee for damage to the unit
that is caused by dirt in the system.
• Before connecting the boiler unit, rinse the system
completely to remove all contamination.
2.4. Seal on the waterside
With the use of the group of taps, you can now make a check
on the seal on the waterside of the system.
2.5. Draconin connection
There must be a connection for the removal of the
condensation water to the drain. This connection must be
fitted with a trap to prevent smell problems.
A tundish connection must be made because of possible
overpressure or underpressure in the drain.
Fit the condensation drain pipe (4 (inner diameter 40 mm
minimum) several centimetres left of the gas pipe.
2.6. Electricity connection
There must be an electrical outlet with earth connection
available at a maximum distance of 1 m from the unit.
The electricity connection (230 VAC) must consist of live,
neutral and earth
A good earth connection is a requirement for good operation
of the unit.
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