Installation guide

_--10 O'CLOCK
"_ 2 O'CLOCK 7
"L--_SUCTION TUBE
8 O'CLOCK
SENSING
4 O'CLOCK
7/8 IN. OD & SMALLER LARGER THAN 7/8 IN. OD
A81032
Fig. 5--PosRion of Sensing Bulb
If ANY refi'igerant tubing is buried, provide a 6 in, xertical
rise at serxice vah,e Refi'igerant tubing lengths up to 36 in
may be buried v,ithout I:urther special consideration. Do not
bury lines fbr lengths o_er 3d in
To prevent damage to unit or service valves observe the
following:
* Use a brazing shield
* Wrap sen'ice valves with wet cloth or use a heat sink
material
Outdoor units may be connected to indoor section using accesso_-
tubing package or field-supplied refiigerant grade robing of correct
size and condition. For tubing requirements beyond 50 fl, substan-
tial capacity and performance losses can occur Following the
recommendations in the Application Guideline and Service
Manual Residential Split-System Air Conditioners and Heat
Pumps Ersing Puron(a Refrigerant will reduce these losses. Refer
to Table 1 fbr field robing diameters. Refer to Table 2 for
accessory requirements.
No buried-line applications greater than 36 in.
If refligerant robes or indoor coil are exposed to atmosphere, they
must be evacuated to 500 microns to eliminate contamination and
moisture in the system.
OETTDOOR I_NIT CONNECTED TO FACTORY-APPROVED
INDOOR [NIT
Outdoor unit contains cmTect system refrigerant charge %r opera-
tion with ARI rated indoor unit with highest sales volume when
connected by 15 t't of field-supplied or fitctow-accesso W robing
Check refi'igerant charge for n_aximum efficiency
INSTALL LIQUID-LINE FILTER DRIER
W ' II O
To axoid compressor damage and per%finance loss due to
plugged circuits and expansion device, installation of filter
drier in liquid line is required.
Refkr to Fig (5and install filter drier as fbltows:
1, Braze 5-in. connector robe to tiquid service valve, Wrap fiher
&ie* with damp cloth
2, Braze filter drier between connector tube and liquid robe to
indoor coil, Flow arrow must point towards indoor coil
REFRIGERANT TUBING
Connect vapor tube to f_tting on outdoor unit vapor service valves,
Connect liquid tube to filter drier (See Fig 6 and Table 1,) Use
refrigerant grade robing,
SWEAT CONNECTION
To a\oid valve damage while brazing, serxice xahes must be
wrapped in a heat-sink material such as a wet cloth.
Service valves are closed fi'om fbctory and ready %r brazing Afier
wrapping service valve and filter drier with a wet cloth, braze
sweat connections using industry accepted methods and materials.
Consuh local code requirements. Refrigerant robing and indoor
coil are now tea@ t'or leak testing. This check should include all
field and factory joints.
EVACUATE REFRIGERANT TUBING AND INDOOR COIL
To avoid compressor damage, nexer use the system compres=
sor as a vacunnl pump
Refiqgerant robes and indoor coil should be evacuated using the
recommended deep vacuum method of 500 microns, The ahernate
triple evacuation method may be used if"the procedure outlined
below is %llowed Always break a vacuum with dW nitlogen,
Deep Vacuum Method
The deep vacuum method requires a vacuum pump capable of
pulling a vacuum of 500 microns and a vacuum gage capable of
accurately measuring this vacuum depth. The deep vacuum
method is the most positive way of assuring a system is flee of air
and liquid water (See Fig. 7,)
Triple Evacuation Method
The triple evacuation method should only be used when vacuum
pump is only capable of pumping down to 28 in of mercu W
vacuum and system does not contain any tiquid water Refkr to
Fig. 8 and proceed as fbllows:
1, Pump system down to 28 in. of"mercu W and allow pump to
continue operating fPr an additional 15 minutes
2, Close service valves and shut off'vacuum pump,
3, Connect a nitrogen cylinder and regulator to system and open
until system pressure is 2 psig
4. (;lose service valve and allow system to stand fbr 1hr During
this time, &y nitrogen will be able to diffuse throughout the
system absorbing moisture,
5, Repeat this procedure as indicated in Fig 8, System will then
be f?ee of"any contaminants and ware* vapor
FINAL TUBING CHECK
IblPORTANT: Check to be certain factor)' robing on both indoor
and outdoor unit has not shifted during shipment. Ensure tubes are
not rubbing against each other or any sheet metal. Pay close
attention to feeder tubes, making sure wire ties on f_eder tubes are
secure and tight.
Step 8--Make Emeetrieal Connections
To avoid personal i*!iuryor death, do not supply pox_ er to unit
with compressor terminal box cover removed.
Be sure field wiring complies with local and national fire, safkty,
and electrical codes, and voltage to system is within limits shown