Install Instructions

17
General Installation Guidelines
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GENERAL INSTALLATION GUIDELINES
Piping Preparation
•Donotallowtherefrigeranttoleakduringbrazing;iftherefrigerantcombusts,itgeneratesatoxicgaswhichcancausephysicalinjuryordeath.
•Donotbrazeinanenclosedlocation,andalwaystestforgasleaksbefore/afterbrazing.Gasleakscancausephysicalinjuryordeath.
•Afterbrazing,checkforrefrigerantgasleaks.Refrigerantgasleakscancausephysicalinjuryordeath.
3. Flaring the pipe end.
•Use the proper size flaring tool to finish flared connections as
shown.
•ALWAYS create a 45° flare when working with R410A. See Warn-
ing on this page.
Creating a Flare Fitting
One of the main causes of refrigerant leaks is defective ared
connections.Createaredconnectionsusingtheprocedureatright(Fig-
ure19).
1. Cut the pipe to length.
•Measure the distance between the indoor unit and the outdoor unit.
•Cut the pipes a little longer than measured distance.
•Cut the cable 4.9 ft longer than the pipe length.
2A. Remove the burrs.
•Completely remove all burrs from pipe ends.
•When removing burrs, point the end of the copper pipe down to
avoid introducing foreign materials in the pipe.
2B. Slide the flare nut onto the copper tube.
4. Carefully inspect the flared pipe end.
•Compare the geometry with the figure to the right and dimensions
as detailed in Figure 18.
•If the flare is defective, cut it off and re-do procedure.
•If flare looks good, blow clean the pipe with dry nitrogen.
90°
2
45°
2
A
R=0.4~0.8
Figure 18: Dimensions of the Flare
Pipe “A” Thickness
Vapor (in. O.D.) Liquid (in. O.D.) Vapor (in.) Liquid (in.) Vapor (in.) Liquid (in.)
1/2 1/4 1/8 1/16 1/8 1/8
5/8 3/8 1/8 1/16 1/16 1/8
Table 3: Flared Connection Dimensions
Piping Preparation
1.Donotusekinkedpipecausedbyexcessivebendinginonespecif-
icareaonitslength.
2.Brazethepipestotheservicevalvepipestuboftheoutdoorunit.
Whenselectingarettings,alwaysusea45°ttingratedforusewith
highpressurerefrigerantR410A.Failuretodosomayresultinrefrig-
erantleakswhichinturncouldresultinpersonalinjuriesordeathfrom
oxygendepletion.Selectedttingsmustalsocomplywithlocal,state,or
federalstandards.
Figure 19: Creating a Flare Fitting
Single Zone Pipe Connections
Copper
tube
90°
Slanted Uneven Rough
Pipe
Reamer
Point
down
Flare nut
Copper
tube
Bar
Copper pipe
Clamp handle
Red arrow
Cone
Yoke
Handle
Bar
"A"
Slanted
Inside is shiny with no scratches
Smooth
Even length
Damaged
surface
Cracked Uneven
thickness
Incorrect Flares
1.
2A. 2B.
3.
4.