Dometic Waeco ColdMachine 54 Installation And Operating Manual page 44

Installing the cooling unit
Mount the one-way couplings (not CS-NC15)
The cooling unit is delivered in a disconnected state (the vaporiser and com-
pressor are separated); however, it has been filled at the factory with the
proper amount of coolant.
➤ Install the machine part and the vaporiser.
➤ Remove the screwed-on caps from the coupling halves that protect the
rubber seal from dirt.
The fig. f, page 8, shows the condition of the coupling halves after
removing the caps when uncoupled.
➤ Place the coupling halves by hand on top without tension and tighten
them by hand (fig. g, page 8).
If the position in fig. h, page 9 has been reached (2–3 mm distance
between both coupling halves), the coupling has not yet been tightened.
The coupling only has rubber seals to prevent the loss of coolant. They do
not provide long-term protection against leakage.
I
NOTE
Always use two open-ended spanners to prevent both couplings
in the coupling holder from turning.
Tools required:
 Open-ended spanner: Width 21 for tightening the coupling
 Open-ended spanner: Width 19 and 16 for holding the coun-
ter-coupling in place
A
NOTICE!
If you do not hold the counter-coupling in place when tightening
the coupling or do not tighten it further by 90°, coolant will leak un-
noticeably and eventually lead to system failure.
In such cases, the complete cooling unit must be disassembled,
returned, the one-way couplings replaced and the device refilled
at the factory.
➤ Tighter the union nuts of the female coupling halves further by another 90°
using open-ended spanners.
✓ The final, metallic and long-term, absolute gas tightness is now ensured,
since the cutting ring of the male coupling half has cut into the face of the
female half.
44
Coldmachine
EN