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WLCA/WLHA High Wall Evaporator
10
REFRIGERANT PIPING
The WLCA/WLHA is equipped with a
Flo-Rater/Piston Expansion device. Con-
nections are sweat type.
The suction line (large) must be insulated
the entire length with closed cell, foam tube
insulation. Do not insulate the liquid line
(small). Connect the outdoor unit according
to the instructions supplied with unit.
All horizontal piping runs must be level and
without dips to trap the oil.
PIPING DO’S AND DON’TS
• Avoid piping on a rainy day.
• Use refrigerant grade copper tubing.
• Use a tubing bender and avoid unnec-
essary bending.
• Cap ends of lines until ready for nal
connections.
Once the unit is mounted and level
the WLCA/WLHA piping connections can
be made by removing the left end cap and
bottom panel:
1. Remove the Philips-head
screws on bottom of
unit and lift bottom
panel off.
2. Exposed piping and condensate drain
connections. (See table on page 36 for
connection size per unit capacity.)
Suction line
Liquid line
Condensate drain
When matching a the WLHA24 with an
18,000 Btuh condenser circuit, the inter-
connecting suction line needs to be 5/8”
O.D. to match the condenser service valve
connection. Therefore the 3/4” O.D. suc-
tion connection of the WLHA24 unit needs
to be reduced to 5/8” at the WLHA24 unit
connection.
Note: The left end cap must
be removed prior to remov-
ing the bottom. Follow the
instructions on page 6 for
removing the end cap.
WLCA/WLHA HIGH WALL EVAPORATOR INSTALLATION INSTRUCTIONS