—19—
TYPICAL PIPING AND WIRING
INDOOR
THERMOSTAT
DISCONNECT
PER NEC*
FROM
POWER
SOURCE
RETURN
AIR
TOP COVER
FROM
GAS LINE
*NEC - NATIONAL ELECTRICAL CODE
ROOF
RETURN-AIR
FLEXIBLE DUCT
CEILING
CONCENTRIC DIFFUSER BOX
(FIELD-SUPPLIED)
SUPPLY-AIR
FLEXIBLE DUCT
ROOF-MOUNTING
CURB
C00022
C00023