overloads are factory set to the motor FLA value and
should not be adjusted. If the current to the motor exceeds
the overload dial setting value, the overload relay auxiliary
Table 66. Filter data
Panel-Type Filters
Unit Model (AC/EC)
Qty
20 & 25 ton
12
30 ton
16
40 ton
16
50, 55 ton
20
60, 70 & 75 ton
35
90-130
25
(a)
Dimensions shown for "Panel-Type Filters" apply to "Throw away", "Cleanable Wire Mesh", and "High Efficiency Throw away" Filters.
(b)
Units ordered with "Bag-Type Filters" or "Cartridge Filters" (box-type) include a bank of "Panel-Type Prefilters"
(c)
The same "Panel-Type Prefilters" are used with "Bag-Type" and "Cartridge (box-type)" filters.
Table 67. "Wet heat" coil fin data
Unit Model(AC/EC)
20, 25, 30 ton
40, 50, 55 ton
60, 70, 75 ton
40, 50 ton
90-130 ton
Note: To determine unit heating capacity (i.e. "low heat" or "high heat"), see digit 9 of the model number stamped on the unit nameplate.
Table 68. Grease recommendation
Recommended Grease for Fan Bearings
Exxon Unirex #2
Mobil 532
Mobil SHC #220
Texaco Premium RB
RT-SVX072D-EN
(a)
Bag-Type Filters
Qty.
Size of each
Size of each
4
12 X 24 X 19
20 X 20 X 2
3
24 X 24 X 19
2
12 X 24 X 19
20 X 20 X 2
6
24 X 24 X 19
5
12 X 24 X 19
20 X 25 X 2
6
24 X 24 X 19
3
12 X 24 X 19
20 X 25 X 2
9
24 X 24 X 19
6
12 X 24 X 19
16 X 20 X 2
8
24 X 24 X 19
3
12 X 24 X 19
24 X 24 X 2
15
24 X 24 X 19
Coil Type
WC Prima Flo (hot water)
WC Prima Flo (hot water)
WC Prima Flo (hot water)
NS (steam)
NS (steam)
Recommended Operating Range
-20 °F to 205 °F
contacts will trip and interrupt the control signal to the run
and bypass contactor coils. This will remove power from
the fan motor and stop operation.
Cartridge Filters (Pre-Evap and
(b)
Final) (box-type)
Qty. (Pre-
Evap/Final
Filter)
Size of each
4/4
12 X 24 X 12
3/3
24 X 24 X 12
2/1
12 X 24 X 12
6/6
24 X 24 X 12
5/5
12 X 24 X 12
6/6
24 X 24 X 12
3/2
12 X 24 X 12
9/9
24 X 24 X 12
6/6
12 X 24 X 12
8/8
24 X 24 X 12
3/5
12 X 24 X 12
15/10
24 X 24 X 12
Total Coil Face Area
(sq. ft.)
Coil Rows
2
13.75
2
19.25
2
26.25
13.75 (1) 5.5 (1)
1
17.5 (2)
1
Service and Maintenance
Panel-Type Prefilters (Pre-
(b)
Evap and Final)
Qty. (Pre-
Evap/Final
Filter)
Size of each
4/4
12 X 24 X 2
3/3
24 X 24 X 2
2/1
12 X 24 X 2
6/6
24 X 24 X 2
5/1
12 X 24 X 2
6/6
24 X 24 X 2
3/2
12 X 24 X 2
9/9
24 X 24 X 2
6/6
12 X 24 X 2
8/8
24 X 24 X 2
3/5
20 X 24 X 2
15/10
24 X 24 X 2
Fins per
Foot
80
80
80
42
52
(c)
Fins per
Foot
110
110
110
96
96
133
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