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Installer’s Guide
3
/4" PVC OR COPPER
TUBING AND FITTINGS
QTY.
1
3
1
1
2
1
MATERIALS
TEE
90˚ ELL
PLUG
4" NIPPLE
2" NIPPLE
3/4" NPT TO PVC OR
COPPER ADAPTER
2" MIN.
2" MIN.
FROM DWG. 21C128186 FIG 1, R1
Condensate Drain Piping
A 3/4-inch female NPT condensate drain connection is provided on the evapo-
rator access panel end of the unit. Provide a trap and fill it with water before
starting the unit to avoid air from being drawn through. Follow local codes and
standard piping practices when running the drain line. Pitch the line downward
away from the unit. Avoid long horizontal runs. See Figure 5, below.
NOTE: Do not use reducing fittings in the drain lines.
The condensate drain must be:
• Made of 3/4" pipe size.
• Pitched 1/4" per foot to provide free drainage to conve
nient drain system.
• Trapped.
• Must not be connected to a closed drain system unless
the trap is properly vented.
Figure 5. Typical Condensate Drain Piping
Table 1. Determine Filter Size
*Filters must be installed in the return air system. The above square footages
are based on 300 F.P.M. face velocity. If permanent filters are used, size per
mfg. Recommendation with clear resistance of 0.05"WC.
UNIT
NOMINAL
CFM
FILTER*
(Sq Ft) SIZE
FILTER
RESISTANCE
4WHC3024A 800 2.67 0.05
4WHC3030A 1000 3.33 0.05
4WHC3036A 1200 4.00 0.05
4WHC3042A 1400 4.67 0.05
4WHC3048A 1600 5.33 0.05
4WHC3060A 2000 6.67 0.05
Air Filters
These units require filters with adequate filter area be provided in the return air
duct. Table 2 below gives filter data. The specific location of the filters depends
on the type of installation and the layout of the duct system. Be sure the owner
is aware of the location of the filter and the need to change them as required.
The Filter Size (Sq. Ft.) are based on 300 F.P.M. face velocity. If permanent
filters are used, size per mfg. recommendation with clean resistance of .05" WC.
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