Fig. 4 — Roof Curb Dimensions
ROOF CURB
ACCESSORY
‘‘A’’ UNIT SIZE
CRRFCURB001A00
149
[356]
581B036-072
CRRFCURB002A00
249
[610]
NOTES:
1. Roof curb accessory is shipped
disassembled.
2. Insulated panels.
3. Dimensions in [ ] are in millimeters.
4. Roof curb: galvanized steel.
5. Attach ductwork to curb (flanges of duct
rest on curb).
6. Service clearance 4 ft on each side.
7. Direction of airflow.
UNIT
581B
SERVICE PLATE SIZES
CONNECTOR
PACKAGE
ACCESSORY
‘‘B’’ ‘‘C’’
‘‘D’’ Alt
Drain
Hole
‘‘E’’
Gas
‘‘F’’
Power
‘‘G’’
Control
036-072
21
11
⁄
16
9
[551]
169
[406]
1
3
⁄
4
9
[44.5]
3
⁄
4
9 NPT
3
⁄
4
9 NPT
3
⁄
4
9 NPT
314213-204
(Thru-the-Side)
3
⁄
4
9 NPT
3
⁄
4
9 NPT
1
⁄
2
9 NPT
CRBTMPWR001A00
(Thru-the-Bottom)
—4—
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