Refrigerant Piping, Piping Do’s and Don’ts

WLCA/WLHA HIGH WALL EVAPORATOR Installation Instructions

REFRIGERANT PIPING

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 final connections.

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.

Once the unit is mounted and level the WLCA/WLHA piping connections can be made by removing the left end cap and bottom panel:

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.

1.Remove the Philips-head screws on bottom of unit and lift bottom panel off.

All horizontal piping runs must be level and without dips to trap the oil.

2.Exposed piping and condensate drain connections. (See table on page 36 for connection size per unit capacity.)

Liquid line suction 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.

WLCA/WLHA High Wall Evaporator

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WLHA, S1C specifications

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