JOHNSON CONTROLS
49
SECTION 3 - HANDLING, STORAGE, AND INSTALLATION
FORM 102.20-N1
ISSUE DATE: 7/06/2016
3
Installing Multi-Zone (MZ) Dampers
If the MZ segment has a shipping split,
a rear discharge at the end of the AHU,
and a MZ damper, the damper will be
shipped loose.
1. Identify the gaskets and hardware needed for in-
stallation.
2. After the AHU top tier is assembled to the bottom
tier and sealed, install the MZ damper assembly,
which includes the hot (top) deck and cold (bot-
tom) deck damper banks that are already connect-
ed at each blade as shown in Figure 73 on page
49.
Distortion will result in unreliable blade
operation.
3. Remove the 16-gauge shipping plate, which is
located between the hot and cold decks from air
entering side only.
4. Applytheneoprenegaskettothemountingang-
es of the damper assembly.
5. Center the damper assembly over the discharge
openings of the hot and cold decks.
6. Attach the damper assembly to the AHU's outer
perimetermountingange,usingthescrews pro-
vided.
7. Remove the 16-gauge shipping plate from the air
leaving side.
8. Install the screws through the mounting anges
between the hot and cold decks.
LD12029a
FIGURE 73 - INSTALLING MZ DAMPER
ACTUATOR
(P/N 025-39032-002)
SCREW
1/4 in. - 14 X .75 in.
(P/N 025-19515-000)
MOUNTING BKT
(P/N 086-03474-516)
MOUNTING
FLANGES
HOT DECK
DAMPER
COLD DECK DAMPER
FACTORY INSTALLED COU-
PLER
AIR FLOW
SHAFT EXTENSION KIT
(P/N 026-33715-002)
MOUNTING BKT
(P/N 086-03474-516)
ACTUATOR
(P/N 025-39032-002)
SCREW
1/4 in. - 14 X .75 in.
(P/N 025-19515-000)
MOUNTING
FLANGES
COLD DECK
DAMPER
HOT DECK
DAMPER
SHIPPING
PLATE AIR
ENTERING
SHIPPING
PLATE AIR
LEAVING
EXTENSION
PIN
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