5. Single & Dual Cooling System Commissioning Steps
5.4 Copper Piping (refer to handout in Zella Pro)
1.
Cut the pipe ends with a pipe cutter
2.
Remove burrs with the cut surface facing downwards
so that the chips do not enter the pipe
3.
Put the flare nuts on pipe
4.
Flare the pipe
5.
Check that the flaring is properly made
6.
Never use old or pre-used pipes
7.
Do not use mineral oil on flared part
8.
Incomplete flaring may cause gas leakage
9.
Use flare nut fixed to unit
10.
Use torque wrenches when tightening the flare nuts
11.
Protect ends from dust
12.
Use pipe bender
13.
NEVER use pipes thinner than 0.8mm even when it is
available on the market.
Please note: Pipe size is 9.5mm for cooling capacity 2kw up to 3.5kw (See enclosed manual with condenser)
Gas side
Liquid side
Gas pipe thermal insulation
Liquid pipe thermal
insulation
20/25/35 class
46 class
20/25/35 class
46 class
O.D. 9.5mm
O.D. 12.7mm
O.D. 6.4mm
I.D. 12-15mm
I.D. 14-16mm
I.D. 8-10mm
Minimum bend radius
Thickness 10mm Min.
30mm or more
40mm or more
30mm or more
Thickness 0.8mm (C1220T-O)
Torque wrench
Spanner
Flare nut
Do not apply refrigeration oil
to the outer surface.
Apply refrigeration oil to the
inner surface of the flare.
Wall
Rain
Be sure to
place a cap.
If no flare cap is
available, cover
the flare mouth
with tape to keep
dirt or water out.
Piping union
Do not apply refrigeration
oil to the flare nut avoid
tightening with over torque.
Flare nut
Apply Oil
Tighten
