520413-BIM-A-0209
10
Johnson Controls Unitary Products
Duct Connections
Ductwork should always be suspended with hangers or
supported by legs. It should never be fastened directly to the
building structure.
Allow clearance around ducts for safety in the handling of
heated air and for insulation when required.
Insulation
Ductwork insulation should meet the following criteria:
• Be used when ducts pass through an unconditioned
space in the cooling season or through an unheated
space during the heating season.
• Include a vapor barrier around the outside to prevent the
absorption of moisture.
• Be no less than 2 inches thick with a weatherproof coating
when applied to ducts exposed to outdoor conditions.
Supply Air Ducts
See Figure 5 for suggested method of connecting supply air
ductwork. Non-flammable material collars should be used to
minimize the transmission of noise and/or vibration.
Figure 5: Suggested Method For Connecting Ductwork
Table 5:
Accessory Operating Weight Distribution (Lbs)
1
ACCESSORY
NH-07
NH/NJ-10
NH/NJ-15
NH/NJ-20
BASE
2
25
25
30
45
HOT WATER COIL
35
35
45
35
STEAM COIL
30
30
35
50
1.These weights should be added to each point load in table 4.
2.This accessory can only be applied on units installed in the vertical position.
24"
AIR
OUTLET
BLOWER
GASKETS
(BY INSTALLER)
FLANGED DUCT
CONNECTION
(Factory Furnished,
Field Installed )
NON-FLAMMABLE
COLLAR
DUCT
TRANSITION
DUCT
