Specifications
14
BASE UNIT DIMENSIONS (cont)
UNIT
581B
STANDARD
UNIT WEIGHT
DURABLADE
ECONOMIZER WEIGHT
ECONOMI$ER
WEIGHT
CORNER
WEIGHT (A)
CORNER
WEIGHT (B)
CORNER
WEIGHT (C)
CORNER
WEIGHT (D)
“H”“J”“K”“L”
Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm
090
870 395 44 20 62 28.1 189 86 161 73 239 109 280 127 2-0
7
/
8
632 3-5
5
/
16
1050 2-9
11
/
16
856 2- 2
7
/
16
672
102
880 399 44 20 62 28.1 191 87 163 74 242 110 284 129 1-2
7
/
8
378 3-5
5
/
16
1050 2-9
11
/
16
856 2- 2
7
/
16
672
120
1035 469 44 20 62 28.1 225 102 192 87 285 129 333 151 1-2
7
/
8
378 4-1
5
/
16
1253 3-0
3
/
8
924 2-10
7
/
16
875
150
1050 476 44 20 62 28.1 228 103 195 88 289 131 338 153 1-2
7
/
8
378 4-1
5
/
16
1253 3-0
3
/
8
924 2-10
7
/
16
875
NOTES:
1. Dimensions in [ ] are in millimeters.
2. Center of gravity.
3. Direction of airflow.
4. On vertical discharge units, ductwork to be attached to
accessory roof curb only. For horizontal discharge units,
field-supplied flanges should be attached to horizontal dis-
charge openings, and all ductwork should be attached to the
flanges.
5. Minimum clearance (local codes or jurisdiction may prevail):
a. Between unit, flue side and combustible surfaces,
48 inches.
b. Bottom of unit to combustible surfaces (when not using
curb), 1 inch. Bottom of base rail to combustible surfaces
(when not using curb) 0 inches.
c. Condenser coil, for proper airflow, 36 in. one side, 12 in.
the other. The side getting the greater clearance is
optional.
d. Overhead, 60 in. to assure proper condenser fan
operation.
e. Between units, control box side, 42 in. per NEC (National
Electrical Code).
f. Between unit and ungrounded surfaces, control box side,
36 in. per NEC.
g. Between unit and block or concrete walls and other
grounded surfaces, control box side, 42 in. per NEC.
h. Horizontal supply and return end, 0 inches.
6. With the exception of the clearance for the condenser coil
and combustion side as stated in notes 5a, b and c, a remov-
able fence or barricade requires no clearance.
7. Units may be installed on combustible floors made from
wood or Class A, B, or C roof covering material if set on
base rail.
8. The vertical center of gravity is 1
′
-7
″
[483] for 090 and 102,
1
′
-11
″
[584] for 120 and 150 up from the bottom of the base
rail.
CONNECTION SIZES
A
1
3
/
8
″
Dia [35] Field Power Supply Hole
B
2
1
/
2
″
Dia [64] Power Supply Knockout
C
1
3
/
4
″
Dia [44] Charging-Port Hole
D
7
/
8
″
Dia [22] Field Control Wiring Hole
E
3
/
4
″
-14 NPT Condensate Drain
F
1
/
2
″
-14 NPT Gas Conn. — 581B090 & 102 —125 Heat
3
/
4
″
-14 NPT Gas Conn. — 581B090 to 120 — 180 Heat
581B 090 to 150 — 224 Heat, 581B120 & 150 — 250 Heat
G
2
″
Dia [51] Power Supply Knockout
BOTTOM POWER CHART, THESE HOLES
REQUIRED FOR USE WITH ACCESSORY PACKAGES —
CRBTMPWR001A00, 2A00 (
1
/
2
″
,
3
/
4
″
) OR
CRBTMPWR002A00, 4A00 (
1
/
2
″
, 1
1
/
4
″
)
*Select either
3
/
4
″
or
1
1
/
4
″
for power, depending on wire
size.
THREADED
CONDUIT SIZE
WIRE
USE
REQUIRED
HOLE SIZES (MAX.)
1
/
2
″
24 V
7
/
8
″
[22.2]
3
/
4
″
Power* 1
1
/
8
″
[28.4]
1
1
/
4
″
Power* 1
3
/
4
″
[44.4]
(003)
1
/
2
″
FPT
Gas 1
1
/
4
″
[31.8]
(004)
3
/
4
″
FPT
Gas 1
5
/
8
″
[41.3]
581B090-150