WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
Comfort where it counts
6
P/N 240008111, Rev. G [06/18/10]
Piston/Orifice Replacement
(when required)
NOTICE — WLHG24 ONLY
Piston/ Orifice replacement
— The factory-installed piston/orifice must be replaced on
Air-Handler / Condenser combitnations noted in table below
. All other applications are
to use the factory-installed orifice. To replace the orifce in the noted models use instruc-
tions and chart as follows.
Replacing the piston/orifice
Follow the instructions on page 9 to remove the left end cap.
1.
The piston orifice (Figure 1, pg. 6) is located in the upper left corner of the unit.
2.
Disassemble the orifice joint, remove the factory-installed orifice, and replace with the
3.
orifice listed in Figure 1 (supplied in the Kit Bag). Make sure o-ring is in good condition
and properly installed.
The end cap can remain off while mounting and installing the unit.
4.
Piston/orifice replacement
Figure 1
Model
Condenser
Factory-installed orifice size
(Inches)
Replacement orifice size
(Inches)
WLH_24
T2C/T2HG2400
T2C/T2HG4400
T3C/T3HG2240
0.054”
0.056”
WLH_24
T2C/T2HG9800
T2C/T2HG8800
T3C/T3HG9980
0.054”
0.049”
WLHA12
T2C/T2HG2400
T3C/T3HG2240
T3C/T3HG2220
T4C/T4HG9992
T4C/T4HG9922
T4C/T4HG2222
0.042”
0.044”
WLH_24
S1C/S1HG8000
0.054”
0.047”
To Air
Handler
