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WLCA/WLHA High Wall Evaporator
PISTON/ORIFICE INSTALLATION INSTRUCTION
REFRIGERANT PIPING
Reducing bushing goes here for
18,000 Btuh system match
WLH24
Any change in the diameter of the tubing
must be made at the indoor connection.
Line-set diameter is determined by the
condenser service valve size.
Use of a larger diameter liquid or suc-
tion line can harm the compressor!
Important:
Replace the existing piston (before installing the unit) with the piston
supplied in Kit Bag when any:
• WLHA24 evaporator is matched with a
S1CA8000 or S1HA8000
condenser which has
an 18,000 Btuh compressor (“8” in the capacity decoding eld). The piston will need
relacement only on the 18,000 Btuh zone.*
Your EMI evaporator unit contains the appropriate piston for your model. Refer to this
document to determine if a change is required based on your condenser rating. If your
match is not listed below no piston change is required. (See chart below)
PROPER INSTALLATION OF PISTON/ORIFICE REPLACEMENT
* “8” in the capacity decoding eld = 18,000 Btuh
Model #
Evaporator
Condenser
Btuh
Factory Installed
Piston/Orice Size
Field Changeover
Piston/Orice Size
WLHA24
S1CA8000 .059” .053”
WLHA24
S1HA8000 .059” .053”
Evaporator