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REMKO KWD serie 25-35-45-55-70-85-100 Manual

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10 Leak testing
The leak test is carried out after the connection
has been made.
1. Flush the system twice with tap water
.
2. Clean the sieve insert on the dirt trap.
3. Fill the system with water again and bleed
the unit at the manual bleed valves.
4. Adjust the test pressure to at least 200 kPa
(2.0 bar).
5. Check the connections after a period of at
least 24 hours for leaking water
. If water is
visible, the connection has not been estab-
lished properly. Tighten the connection or
establish a new connection.
6. After a successful leak test, remove the
excess pressure from the medium piping if a
water-glycol mixture is used or adjust the
non-circulating pressure to the required
system pressure.
11 Before commissioning
Anti-freeze protection for the medium
If a water-glycol mixture is used, it is to be pre-
mixed before being put in the system. The desired
concentration is then to be checked.
Bleeding the system
n Air may still be in the pipe lines after the leak
testing. This is carried during operation of the
circulation pump to the automatic bleeding
valves or to the cold water drain. It is neces-
sary to bleed again here.
n The non-circulating pressure must then be
adjusted to the required system pressure.
1
Fig. 49: Manual bleeding
1: Manual bleeding
NOTICE!
During manual bleeding, any glycol mixtures
which escape must be disposed of separately
.
Do not feed them into the condensate tray!
Diaphragm expansion vessel
n The preliminary pressure for the diaphragm
expansion vessel must be adjusted individually
to the system layout, the volume of the medium
and the installation site.
Valves for hydronic balancing
n The calculated excess pressure in the pipe net-
work layout at the individual cold water outlets
must be adjusted with the hydronic balancing
valves.
39
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