Technical Guide

333491-YTG-G-0211
Johnson Controls Unitary Products 87
Unit Typical Roof Curb Installation (Gas Model Shown)
Unit Accessory Dimensions
Roof Curb
1
1. 8” Roof Curb also available.
MANUAL GAS
SHUT-OFF VALVE
FIELD SUPPLIED
DISCONNECT SWITCH
MOUNTED ON UNIT
TO POWER
SUPPLY
TO GAS
SUPPLY LINE
CONTROL WIRING TO
INDOOR THERMOSTAT
RETURN
AIR DUCT
SUPPLY
AIR DUCT
1
RECOMMENDED
DUCT SIZE
17-1/8" x 21-1/2"
RECOMMENDED
DUCT SIZE
17-1/2" x 16-3/4"
OPENING FOR
RETURN AIR DUCT
OPENING FOR
SUPPLY AIR DUCT
42-2/3
40-3/4
17-5/8
17-1/4
43-1/4
22
45-1/8
3-1/2
14