Dometic WAECO ColdMachine 54 Notice D'utilisation page 44

Installing the cooling unit
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.
Note
I
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 counter-
coupling in place
Caution!
a
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, re-
turned, 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.
Caution!
a
The coolant in the system is under pressure.
Wear safety goggles and gloves when disconnecting.
If the device must be decoupled for return shipping, make sure to screw the
caps back onto the coupling halves to prevent dirt and moisture from entering
the refrigerant circuit.
44
ColdMachine