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Installation Instructions
Step 3 - Installation of the Outdoor Unit (Cont.)
E. Install Copper Lineset
• For ASH220NCDWA, ASH218JCDDA1, ASH324NCDWA,
ASH324JCDDA1, ASH436JCDDA1, and
ASH436NCDWA1 see table on page 16.
• Cut the line set to length.
• Place nut over the pipe and then flare with the R-410A
flaring tool.
NOTE: Follow standard practices for creating pipe flares.
When cutting and reaming the tubing, use caution to
prevent dirt or debris from entering the tubing. Remember
to place nut over the tubing before flaring.
• To join the line set, directly align the tubing flare to the
fitting on the other pipe. Slide the nut onto the fitting and
hand tighten.
• Torque the fittings according to the specifications shown in
the torque chart below.
Forced fastening without careful centering will damage the
threads and cause a refrigerant leak.
Pipe Diameter (ø)
Liquid side 6.35mm (1/4")
Liquid/Gas side 9.52mm
(3/8")
Gas side 12.7mm (1/2")
Gas side 15.88mm( 5/8")
• Two wrenches are required to join the
flare connection; one standard wrench
and one torque wrench adjusted to the
proper settings.
• Repeat the process for attaching the
other end of the line set.
CAUTION
CAUTION*
CAUTION*
Indoor unit
B
Indoor unit
B
A
A
Outdoor unit
Outdoor unit
• Max. Elevation: A Max
Outdoor unit
Outdoor unit
= 33ft / 10m (09k / 12k)
= 50ft / 15m (18k / 24k)
Oil trap
Oil trap
B
B
• Max. Length: B Max
Indoor unit
Indoor unit
A
= 50ft / 15m (09k / 12k)
A
= 83ft / 25m (18k / 24k)
*NOTE: Oil trap is only required for
*NOTE: Oil trap is only required for
2U18MS2VH*, other multi-split systems
2U18MS2VH*, other multi-split systems
don't require oil trap.
don't require oil trap.
31-5000560 Rev. 3
Fastening torque
18N.m/13.3Ft.lbs
18N.m/13.3Ft.lbs
55N.m/40.6Ft.lbs
60 N.m/44.3Ft.lbs
Half union
Flare nut
Spanner
Torque wrench
Outdoor unit
Outdoor unit
B
B
Indoor unit
Indoor unit
A
A
●
●
Max. Elevation: A Max
Max. Elevation: A Max
= 33ft / 10m (09k / 12k)
= 33ft / 10m (09k / 12k)
= 50ft / 15m (18k / 24k)
= 50ft / 15m (18k / 24k)
●
●
In case the height of A is more than
In case the height of A is more than
15ft / 5m, an oil trap should be
15ft / 5m, an oil trap should be
installed every 16-23ft /5-7m
installed every 16-23ft /5-7m
●
●
Max. Length: B Max
Max. Length: B Max
= 50ft / 15m (09k / 12k)
= 50ft / 15m (09k / 12k)
= 83ft / 25m (18k / 24k)
= 83ft / 25m (18k / 24k)
F. Leak Test
Perform the following steps for EACH line set.
ASH220NCDWA, ASH324NCDWA, ASH436NCDWA1,
ASH218JCDDA1, ASH324JCDDA1 & ASH436JCDDA1 have
a main service valve. Performing the following steps will test
ALL line sets.
• Remove the cap on the service valve.
• Using a tank of dry nitrogen and approved regulator, charge
the system with 150 psig of dry nitrogen using mini-split
adapter to connect the valve.
• Check for leaks at the flare fittings using soap bubbles
or another detection device. If a leak is detected, make
repairs to the fittings and recheck. Proceed if no leaks are
detected within 3 minutes.
• Using the same tank/regulator, charge the system to 300 psig.
• Check for leaks as earlier. Proceed if no leaks are detected
within 3 minutes.
• Using the same tank/regulator, charge the system to 500 psig.
• Check for leaks as earlier. Keep system pressurized for at
least 20 minutes.
Do not use acetylene, oxygen or
WARNING
compressed air or mixtures containing air,
oxygen, or combustible gases for pressure testing. Do not
use mixtures of hydrogen containing refrigerant and air above
Forced fastening without careful centering may
atmospheric pressure for pressure testing as they may
damage the threads and cause a refrigerant leak.
become flammable and could result in an explosion.
Refrigerant, when used as a trace gas, should only be mixed
Pipe Diameter(ǿ)
Fastening torque
with dry nitrogen for pressurizing units. Failure to follow
Liquid side6.35mm(1/4")
18N.m/13.3Ft.lbs
these recommendations could result in death or serious injury
Liquid/Gas side9.52mm(3/8") 42 N.m/30.1Ft.lbs
Gas side 12.7mm(1/2")
as well as equipment or property damage.
55N.m/40.6Ft.lbs
Gas side 15.88mm(5/8")
60 N.m/44.3Ft.lbs
G. System Evacuation
NOTE– Do not open service valve.
• Remove the suction line cap and attach a manifold
gauge, micron gauge, and vacuum pump to
the suction line port using adapter AD-87 (see
illustration).
• Evacuate the system to at least 350 microns.
• Close the vacuum pump valve and check the micron
gauge. If the gauge rises above 150 microns in
60 seconds, the evacuation is incomplete or there
is a leak in the system. If the gauge does not rise
above 150 microns in 60 seconds, the evacuation is
complete.
• Once evacuation is complete, remove the adapter
and hose connection from the suction line port and
replaced the cap.
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