Form PA102.20-N1
43
Installation & Assembly Manual │
PACE
SECTION 3 - HANDLING, STORAGE, AND INSTALLATION
Issue Date: 07/03/2018
3
Installing Field Supplied MZ Damper
Actuators
When the actuators are field supplied for MZ dampers,
use the following information to select the correct size
actuator.
• Required torque is 7 in-lb/sq. ft of damper area up
to 2500 feet per minute (FPM).
• Damper blades are 6 in. wide and vary in height.
• Calculate the torque by the number and size of
blades in each zone. There are hot deck blades
directly connected to cold deck blades.
• Determine the number of blades per zone by the
system cubic ft per minute (CFM), and static pres-
sure requirements for each zone by the engineer’s
construction documents.
• Cut the blade linkage (flat rods) connecting all
blades of each deck at the appropriate places to
divide the decks into correct size zones. These
rods are mounted externally on the assembly.
Make sure to cut out a section of the flat connect-
ing rod, which will prevent interference when the
zones modulate in opposite directions.
• One damper shaft extension kit (P/N 026-33715-
002), as shown in
vided for each zone per the factory order form.
LD116504
Figure 51 -
Damper Shaft Extension Kit (P/N 026-
33715-002)
• The contractor should supply the actuators and
mounting brackets. The part numbers are avail-
able upon request.
• On the rear mount (discharge through end of the
AHU), always mount the actuators on the top of
the upper deck.
• Do not allow the duct insulation to restrict the
damper blades or external linkage.
• Direct coupled actuators are recommended.
• Make duct connections at the zone dividers with-
out restricting the damper blade(s).
SHIPPED LOOSE PARTS
The shipped loose parts, which may be required, are
shown in
Figure 52 on page 43 through Figure 68
Installation instructions for the shipped
loose parts are listed on the
Installation Instructions
and Ship Loose Items Inside
label, located on the ac-
cess door of the first fan skid in the air stream.
3/8 in. Lock Nut
3/8 x 3/4 in. Button
Head Screw
3/8 x 3/4 in. Button
Head Screw
LD11029a
Figure 52 -
Second Tier Tie-Down Fastener Pack
(P/N 386-03419-000)
Raceway Lifting Lug at
Shipping Split Before
Assembly
Assembled Raceway
Lifting Lugs
3/8 x 1-1/2 in. Bolt 3/8 in. Nut
3/8 in. Flat
Washer
3/8 in. Lock
Washer
LD11030a
Figure 53 -
Bottom Raceway Shipping Split Fastener
Pack (P/N 386-03418-000)
