Manual 2100-354
Page
14
AIR FILTERS
Air filters for the return air side of the system are not
provided as part of the various types of applications for
these models, and must be field supplied and installed as
part of the final installation.
Prior thought should be given to return air location and
placement of the air filter(s). The air filter(s) must be of
adequate size and readily accessible to the operator of the
equipment. Filters must be adequate in size and properly
maintained for proper operation. If this is not done,
excessive energy use, poor performance, and multiple
service problems will result. It is impossible to oversize
air filters. Generous sizing will result in cleaner air and
coils as well as lower operating costs and extend the time
between required changes. Table 8 shows minimum filter
areas and recommended filter sizes. Actual filter sizes can
vary with the installation due to single or multiple returns
utilizing a filter/grille arrangement or being placed
immediately ahead of the indoor coil face in the return air
duct.
5.
OTHER INSTALLATIONS
– Many other
installations are possible with the packaged heat pump.
No matter what the installation, always consider the
following facts:
A. Insure that the discharge air is not obstructed inany
way so as to cause operation difficulties.
B. The indoor coil drain pan is equipped with a
coupling that must be piped through a condensate
drain trap to a suitable drain.
C. Always mount the unit is such a position that it
may be easily reached for servicing and
maintenance.
D. Insure that the unit is clear so that proper air flow
over the outdoor coil will be maintained.
If this unit is operated in cooling below a 65° outdoor
ambient temperature, the installation of low ambient
controls (CMA-6) to unit is required.
CONDENSATE DRAIN TRAP
It is very important to provide a trap in the condensate
drain line to allow a positive liquid seal in the line and
assure correct drainage from the coil condensate pan.
Install condensate drain trap shown in Figure 8. Use drain
connection size or larger. Do not operate unit without
trap. Unit must be level or slightly inclined toward drain.
With a trap installed on a unit located in an unconditioned
area, water in the trap may freeze. It is recommended that
the trap material be of a type that will allow for expansion
of water when it freezes.
FIGURE 8
CONDENSATE DRAIN TRAP
MIS-136
NOTE: If roof hood accessory is to be used, information
on air filters may be found under that heading
in this manual. Air filters are supplied as part
of that package.
TABLE 8
FILTERS REQUIRED AND SIZE
.
o
N
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d
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F
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m
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R
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S
4
2
1
1
H
P
4
2
2
1
H
P
0
3
1
1
H
P
0
3
2
1
H
P
6
3
1
1
H
P
6
3
2
1
H
P
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e
h
c
n
I
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r
a
u
q
S
2
6
4
)
t
e
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F
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r
a
u
q
S
1
2
.
3
(
1
x
8
/
5
-
0
3
x
5
1
2
4
1
1
H
P
2
4
2
1
H
P
8
4
0
1
H
P
8
4
2
1
H
P
0
6
0
1
H
P
s
e
h
c
n
I
e
r
a
u
q
S
8
0
6
)
t
e
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F
e
r
a
u
q
S
2
6
.
4
(
1
x
0
2
x
6
1
)
2
(
