Zanotti un0 010, Workshop Manual

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53
3.3 Valves
Cooling Circuit
(g)
Disconnect 3-way valve from copper tubes with soldering flame.
(h)
Clean pipe ends with a special brush and blow with dry nitrogen.
CAUTION
!
Never blow with normal air, it contains too much
humidity.
(i)
Place new valve in position.
CAUTION
!
Using test coil check valve operativity before.
CAUTION
!
Pay attention to valve flux direction.
(j)
Braze new valve
(k)
Reinstall valve support and clamp valve.
(l)
Vacuum unit.
(m)
Respect a waiting time and check for leaks.
(n)
Charge refrigerant 3.2.4 Section.
(o)
Check defrost operations.
YK Capacity Control Valve Replacement
Capacity control valve is equipped in some
model only, this option helps road starting
operation reducing torque force required from
engine driven alternative compressor.
(a)
Disconnect unit from electrical supplies (Battery and Main).
(b)
Open unit door and right or refrigeration side cover and fold down electrical Box.
(c)
Recover Refrigerant 3.2.2 Section.