Leak Testing; Before Commissioning; Bleeding The System - Kemper KHS CoolFlow 618 01 001 Manuel D'utilisation

Leak testing

The leak test is carried out after
the connection has been made.
1. Flush the system twice with
clean tap water.
2. Clean the mesh of the dirt trap
provided by customer.
3. Fill the system with water again
and deaerate the unit at the
manual bleed valves.
4. Adjust the test pressure to at
least 250 kPa (2.5 bar).
5. Check the connections for
leaking water after a period of
at least 24 hours . If leaks are
visible, the connection has not
been properly made. Tighten
the connection or establish a
new connection.
6. After a successful leak test, re-
move 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.
6 Unit preliminary pressure
Unit preliminary
pressure

Before commissioning

Filling the system
The system is filled at the customer-
provided filling and draining connec-
tions.
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.
Unit preliminary pressure for the
medium
The preliminary pressure of the
medium (without operation of the
circulation pump) varies within the
system. From the highest point, the
pressure increases by approx.10 kPa
(0.1bar) per metre difference in heigh
(geodetic heigh). The value measured
at the highest point is identified as the
non-circulating pressure.
The position of the unit in the system
is decisive in the calculation of the
unit's preliminary pressure (pressure of
the manometer on the unit installed
by the customer). The pressure must
be set to at least 70 kPa (0.7 bar).
Non-circulating
pressure
Unit preliminary
pressure
Geodetic sys-
tem heigh
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If the unit is positioned at the
■
lowest point in the system, the
unit preliminary pressure
(=non-circulating
pressure+geodetic system alti-
tude) must be set to at least 70
kPa (0.7 bar) + 10 kPa (0.1bar)
x geodetic system altitude.
If the unit is positioned at the
■
highest point in the system,
the unit preliminary pressure
(=non-circulating pressure) to
at least 70 kPa (0.7 bar). Please
note that the system pressure at
the lowest point is increased by
the geodetic system altitude!

Bleeding the system

Air may still be in the pipe lines
■
after the leak testing. The op-
eration of the circulation pump
transports this to the next high-
est point or to the cold water
consumer. Here it is necessary
to vent again (Figure 7).
Also vent the pump if neces-
■
sary.
The non-circulating pressure
■
must then be adjusted to the
required system pressure.
7 Manual bleeding
Manual
bleeding
- 07.2020 / K410061801001-00 - 71/44
EN