Trane GRCA - Page 21

Figure
11
3.
Check
and clean
DX
or
Chilled Water coil twice
yearly,
if unit
is so
equipped
per
manufacturer's
service
manual.
Chilled Water coil must
be
win-
terized at beginning of heating season (i.e. drain
water from coil per manufacturer's instructions).
4. Check air
throughput at beginning of heating
season to confirm
unit
operation is
within
the
specified temperature rise range.
5.
At beginning of heating season clear
Condensate Drain Pan and P-trap of
water if
unit is equipped
with DX
or
Chilled water coil.
Clean out drain pan and
fill P-trap with
a
non-
toxic glycol
solution.
6.
Evaporative cooler must be cleaned
and main-
tained per manufacturer's
instruction frequently
during the
operating
season.
7.
Inspect Control Dampers during
periodic mainte-
nance. Damper pivot points
should
be
cleaned
to ensure free damper
operation.
8.
Blower wheels should be checked
periodically
for dirt build-up on
blades. Clean as
required.
FILTERS
It is
recommended that
air filters
be
changed or
cleaned
at least
four times
a
year. More
frequent
attention to filters is
required if the air being handled
by
the
unit is
unusually dirty.
Air flow reduction,
caused by the
dirty air filters, will increase
the dis-
charge air
temperature and may cause
unit cycling
on the primary limit.
Filters (by others)
should
be
serviced
regularly
and
changed
or washed when
necessary to
maintain the
required air
throughput. In
a
dusty
environment, fil-
ters may clog up in
less than one
month.
H i gh CFM
Blow
e
r A ir F
i
lt
e
r Siz e R e
quirements
Number
of Filters Required
Unit Input
16
x 20 (in) 20 x
20 (in)
200
MB tu
h (58.6
kW) 8
250 MB tu h (73.2 kW) 8
300
MB
tu h (87.9
kW) 8
4
35 0 MB tu h ( 1
02.6
k W) 8
4
4
0 0
MB tu h (1 1 7.2 k W)
1 2
5 00
MBt
u
h (146.5 kW) 8
600 M Btuh (175.8 kW) 8
4
7
0
0 MBtu h (205.1
kW)
8
4
800
MBtu
h
(234. 4 kW)
1 2
1 ,200 MB
tu
h (35 1
.6kW)
1 2
Standard CFM
Blower Air Filter
S
i ze R
e q
ui r e m
e
nt s
Number
of Filters Required
Un i t
Input 16 x 20 (
in
)
20 x
20
(
in )
100 MB tuh (29.3 kW)
4
150 M Btuh (44.0 kW)
4
20
0
MB tuh (58.6 k W )
4
25
0
MBt uh (73.2 kW )
4
300
MBt uh (87.9 k W)
4
2
350
MB t u h (102.6 kW)
4
2
4 00
MB tuh ( 11 7.2
kW)
6
500 MB tuh ( 1 46.5 k W)
4
60 0
MBt uh ( 1 75.8 kW)
4
2
700 MBtuh (205.1
kW) 4
2
800 M
B tu h (234. 4 kW)
6
AIR BLOWER
Belt Tension
Adjustment Standard
CFM
Blower belt
tension can
be adjusted by
loosening
motor
mount-
ing
bolts marked A (See
Figure 11).
To
tighten belt,
slide motor
down motor
mounting
bracket and
re-fas-
ten
motor to
mounting bracket.
-17-
HIGH CFM BLOWER
STANDARD CFM BLOWER