Operating Manual SunCool for SUNTEST
®
CPS+
- 24 -
6
SunCool start up
6.6 Outdoor installation
of the liquefier unit
NOTE – closing state of the valves!
To check for leaks, the stop taps of the valves on the
liquefier unit must not be open (see
Fig. 6.5, Page 23
):
1. Connect pipes to the valves of the liquefier unit and
the pipe with the quick-release couplings.
2. Connect the vacuum pump to the maintenance aperture
6
of the return valve of the liquefier unit.
3. Drain the pipes empty until an absolute pressure of
0.1 bar is reached.
4. Switch off the vacuum pump. Measure the pressure
again after 30 minutes. The pipe must hold a constant
pressure of 0.1 bar.
5. Remove the connecting hose of the vacuum pump
from the maintenance aperture of the stop tap and
seal the maintenance aperture with the stopper
7
.
Opening the coolant circuit (Fig. 6.6):
1. Unscrew the stoppers
1
and
4
from the valves.
2. Fully open the stop taps
3
and
5
of the two valves
with the allen wrench
2
. Turn the stop tap carefully
counterclockwise to the stop.
3. Unscrew the stoppers
1
and
4
on the valves and
tighten until the torque increases. Then tighten the
stopper by a quarter turn.
NOTE – leak test!
After the tightness test and opening of the coolant circuit,
the entire pipe system must be checked for leaks with a
leak tester.
Checking the fill volume of the coolant:
The inspection can be carried out with a portable pressure
gauge for freon with a pressurized connection of ¼ SAE.
The vacuum pump is connected to the valve‘s maintenance
connection. The read pressure must correspond to the
saturation pressure of the respective room temperature
(20 °C = 14.4 bar / 0 °C = 7.98 bar).
Fig. 6.6
1
4
2
3
5
