18
Outdoor Unit
Refrigerant Piping
Refrigerant Piping
■
Connecting the pipes to the outdoor unit
1. Liquid pipe
• Align the center of the pipings and sufficiently tighten
the flare nut with fingers.
• Finally, tighten the flare nut with torque wrench until
the wrench clicks.
- When tightening the flare nut with torque wrench,
ensure the direction for tightening follows the arrow
on the wrench.
■
Possible direction for field piping
• For the units with capacity more than 42 kBtu/h, the
installation piping is connectable in four directions.(refer
to figure 1)
• When connecting in a downward direction, knock out the
knockout hole of the base pan.
(refer to figure 2)
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Preventing foreign objects from
entering (Figure3)
• Plug the pipe through-holes with putty or insulation
material(procured locally)to stop up all gaps,as shown in
the figure 3.
• Insects or small animals entering the outdoor unit may
cause a short circuit in the electrical box.
2. Gas pipe
• Braze suitable field piping with service valve of gas pipe.
<Gas pipe>
<Liquid pipe>
Torque wrench
Wet towel
Forward
Sideways
Backward
Knock-out
Base pan
Downward
Gas side piping
(Bigger Dia.)
Liquid side piping
(Smaller Dia.)
Putty or insulating material
(produced locally)
Drain hose
Connecting wire
Connection pipe
<Figure 2>
<Figure 1>
<Figure 3>
mm
inch
kgf.m
Ø9.52
3/8
3.4~4.2
Outside diameter
Torque
CAUTION
Take care so that there is no thermal damage on the service valves of the outdoor unit.
(Especially packing part of service port.) Wrap the service valve with a wet towel when brazing it as shown figure above.
CAUTION
• Make sure that pipe doesn't contact with the compressor terminal cover
and comp bolt.
• Always insulate the liquid and gas-side field piping and branch.
Summary of Contents for Multi V mini ARUV Series
Page 64: ...Memo 64 Outdoor Unit ...
