System Evacuation - Haier 2U18MS2VH Serie Manuel D'installation

INSTALLATION INSTRUCTIONS
E. Install Copper Lineset
• For 2U20EH2VH*, 2U18MS2VH*,
3U24EH2VH*, 3U24MS2VH*, 4U36MS2VH*,
and 4U36EH2VH* see table on page 15.
• 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 may
union
Flare nut
damage the threads and cause a refrigerant leak.
Pipe Diameter(ǿ)
Liquid side6.35mm(1/4")
Liquid/Gas side9.52mm(3/8") 42 N.m/30.1Ft.lbs
Gas side 12.7mm(1/2")
er Torque wrench
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*
Indoor unit
B
A
Outdoor unit
Outdoor unit
B
A
*NOTE: Oil trap is only required for
2U18MS2VH*, other multi-split systems
don't require oil trap.
16
Step 3 - Installation of the Outdoor Unit (Cont.)
Fastening torque
18N.m/13.3Ft.lbs
55N.m/40.6Ft.lbs
60 N.m/44.3Ft.lbs
Half union
Spanner
Outdoor unit
B
A
●
Max. Elevation: A Max
= 33ft / 10m (09k / 12k)
= 50ft / 15m (18k / 24k)
●
In case the height of A is more than
15ft / 5m, an oil trap should be
Oil trap
installed every 16-23ft /5-7m
Indoor unit ●
Max. Length: B Max
= 50ft / 15m (09k / 12k)
= 83ft / 25m (18k / 24k)
F. Leak Test
2U18MS* and 3U24MS* do not have main service
valves. Perform the following steps for EACH line set.
4U36MS*, 2U20EH*, 3U24EH*, and 4U36EH* 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.
If no leaks are detected within 3 minutes, proceed.
• Using the same tank/regulator, charge the system
to 300 psig.
• Check for leaks as earlier. If no leaks are detected
within 3 minutes, proceed.
• Using the same tank/regulator, charge the system
to 500 psig.
• Check for leaks as earlier. Keep system pressurized
for at least 20 minutes.
WARNING
containing air, oxygen, or combustible gases for
pressure testing. Do not use mixtures of hydrogen
containing refrigerant and air above atmospheric
pressure for pressure testing as they may become
flammable and could result in an explosion. Refrigerant,
when used as a trace gas, should only be mixed with dry
nitrogen for pressurizing units. Failure to follow these
Forced fastening without careful centering may
recommendations could result in death or serious
Flare nut
damage the threads and cause a refrigerant leak.
injury as well as equipment or property damage.
Pipe Diameter(ǿ)
Liquid side6.35mm(1/4")
Liquid/Gas side9.52mm(3/8") 42 N.m/30.1Ft.lbs
G. System Evacuation
Gas side 12.7mm(1/2")
Torque wrench
Gas side 15.88mm(5/8")
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
Indoor unit
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.
Do not use acetylene, oxygen or
compressed air or mixtures
Fastening torque
18N.m/13.3Ft.lbs
55N.m/40.6Ft.lbs
60 N.m/44.3Ft.lbs
31-5000001 Rev. 7