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YORK INTERNATIONAL
24
FORM 100.50-NOM1 (604)
Installation
FILTERS
Two-inch “throwaway”
Þ
lters are standard and factory
installed in a
Þ
lter rack located prior to the evaporator
coil. Any optional pre-
Þ
lters ordered with the unit will
be shipped inside the unit, but must be
Þ
led installed.
The unit can also be ordered with an extended cabinet
and 95% ef
Þ
cient post-
Þ
lters. These post-
Þ
lters are
installed at the factory.
Pre-
Þ
lters must always be installed ahead of the evapo-
rator coil. Post and pre-
Þ
lters must be kept clean and
replaced with the same size and type as shipped with
the unit. Dirty
Þ
lters will reduce the capacity of the unit
and may result in frosted coils and safety shutdowns.
Required
Þ
lter sizes and qualities are shown in Table 2.
The unit should never be operated for any length of time
without the proper
Þ
lters installed in the unit.
CONDENSATE DRAIN
Condensate Drain Piping
The ECO
2
cooling coils are located in the units so that
the supply air is drawn through them. This results in
the condensate being subjected to negative (-) static
pressure. Unless some means of pressure equalization
is provided in the condensate drain, the air rushing back
through the drainpipe will cause the condensate to build
up in the drain pan. As the unit continues to operate, the
accumulated water will be carried with the air stream,
over
Þ
lling the drain pan causing possible water leaks
into the supply duct and/or causing water damage in
the building. A trap must be installed to prevent this
condensate water build-up (
see Figures 4 & 5
).
"H" must be at least
1 inch plus fan total
static pressure
"X" = 1/2 "H"
FIG. 5 -
TRAP DETAIL FOR DRAW THROUGH
APPLICATION
LD05370-1
FIG. 4 – DRAIN TRAP SHOWING WATER
LOCATION
DURING
DRAW
THROUGH
OPERATION STAGES
LD06342-1
DRAIN
PAN
DRAIN
PAN
DRAIN
PAN
DRAIN
NIPPLE
TRAP
NO.1 - FAN OFF
NO. 2 - TRAP CONDITION WHEN FAN STARTS
NO. 3 - FAN RUNNING AND CONDENSATE
COOLING COIL
DRAIN PAN
Condensate Drain Trap
For
"Draw-through"
applications install a trapped con-
densate drain line at unit drain con nec tion (
see Figure
5
) according to all governing codes. “H” dimension
must be at least 1 inch greater than design Total Static
Pressure (TSP) of fan.
The trap and drain lines should be protected from freez-
ing. Plumbing must conform to local codes. Use a seal-
ing compound on male pipe threads. Install condensate
drain lines from the 1-1/4 inch NPT female con nec tions
on the unit to an open drain.
The unit must be prop er ly trapped and
charged with water before the units
are started.