8

Mounting Unit on Wall

The units can alsobe mounted on the wall using the accessory
mounting kit.
Complete Outdoor Refrigerant Piping Conn ec-tions
Followthe following general guidelines:
1. Use refrigerantgrade field– supplied tubing.
Refer to Table4 for the correct line sizes.
2. Do not use lessthan 10 ft (93.05 m) of interconnecting
tubing.
CAUTION
!
UNITDAMAGE HAZARD
Failure to follow this caution may result in equipment
damageor improper operation.
Ifany section of pipe is buried,there must be a 6 in. (152.4
mm) verticalrise to the valve connections on the outdoor
unit. If more than the recommended length is buried,
refrigerantmay migrate to cooler, buried sectionduring
extended periods of system shutdown. This causes
refrigerant slugging and could possibly damage the
compressor at start--up.
When morethan 80 ft (24.4 m) of interconnectingtubing is used,
consultthe Duct--FreeSplit System Long Line Application Guide
for required accessories.
3. Insulate both lin es. A minimum of 1/2 in ch foam pipe insu-
lation is recommended.
4. Run the refrigerant tubesas directly as possible and avoid
unnecessaryturns andbends.
5. Suspend refrigeranttubes to avoid damageto insulation or
tubesso they do not transmitvibration to the structure.
6. When passingrefrigerant tubes through the wall,seal the
openingso rain and insectsdo not enter the structure.Leave
some slackin refrigerant tubes betweenstructure and out-
doorunit to absorb vibration.
NOTE: A fusible plug is locatedin unit suction line; do not cap
thisplug. If local codes requireadditional safety devices,install as
directed.

Connection at Outdoor Unit

CAUTION
!
UNITDAMAGE HAZARD
Failure to follow this caution may resu lt in equipment damage
orimproper operation.
To prevent damage to unit or service valv es observe the
following:
SAb razing shield MUST be used.
SWrapservice v alves with wet cloth or use a heat sink
material.
38HDFUnits:
1. Assemble the connector tube to th e factory supplied filter
drierby:
a. Braze the field supplied connector to the inlet of the
filterd rier (see Fig. 17)
b. Braze the factorysupplied flare connectorto the outlet
end of the filter drier (see Fig.17)
A09499
Fig.17 --38HDF018--036Connector TubeAssembly
2. Assemble the Accuratorbody (see Fig. 18) using the correct
factory supplied piston (refer to Table 7) .
NOTE:Arrow on AccuRater body pointsin free flow direction, away from the
indoorcoil.
A09501
Fig. 18 -- AccuRater (bypass type) Meterin g Device
Components
3. Attach the com plete Accurator assembly to the flareconn ec-
tion end of the filter drier
4. Braze the completed filter drier/Accurator assembly to th e
liquidservice valve.
5. Connect the field sup plied line set to the filter drier/Accura-
tor assembly and the suction valve. A sweat connection is
requiredat the suctionvalve and flare connectionis required
forthe mixed phase line.
6. Insulateany exposed areas between the line set and the li-
quidvalve.