Zone Damper Section; Mixing Box/Filter Mixing Box Damper Linkage - Carrier AERO 39MN Installation, Start-Up And Service Instructions Manual

Table 19 — Linkage Configurations
LINKAGE CONFIGURATION
Top-Bottom
Top-Rear
Top-Face*
Rear-Bottom
Side-Rear
NO-LINKAGE CONFIGURATION
Side-Bottom
Side-Top
* Size 50-110 will use one actuator per damper.
Table 20 — Damper Operating Torque (in.-lb)
COMPONENT
03 06 08
Zone
N/A 12 12
Damper
Mixing or
13 26 32
Exhaust Box
Side Mixing or
20 29 32
Exhaust Box
CD60 / Airflow
20/ 20/ 20/
Measuring
20 20 20
Damper
Integral and
Internal Face 24 35 48
and Bypass
External Face 30/ 44/ 60/
and Bypass 20 26 32
COMPONENT
30 36 40
Zone
12 18 18
Damper
Mixing or
94 143 158
Exhaust Box
Side Mixing or
120 167 183
Exhaust Box
CD60 / Airflow
38/ 57/ 63/
Measuring
56 86 95
Damper
Integral and
Internal Face 184 211 248
and Bypass
External Face 218/ 203/ 224/
and Bypass 94 129 129
NOTES:
1. Damper shaft moves 90 degrees from open to close.
2. Operating torques is shown for one damper. Multiply the value shown by
the number of dampers for total with one actuator.
Zone Damper Section —
the section as follows:
1. Remove the screws holding the zone damper section to
the heating coil section and remove the lag screws hold-
ing the damper to the shipping skid.
2. Place the supplied 1 / -in. thick x 1
4
ket around the perimeter of the cooling and heating coil
section discharges. Use two gasket strips on partition
panels to obtain double width.
3. Rig the zone damper section and lift it into position on
(vertical discharge) or next to (horizontal discharge) the
gasketed cooling and heating coil sections.
4. Fasten the damper section to the coil sections using the
supplied 1 / -14 x 3 / -in. sheet metal screws.
4 4
5. Install control shaft and bearing for each individual
zone after cutting linkage (for the job specific zone
application).
Control shaft extensions are bagged and wrapped to the
inside of the zone damper blades. Additional field-
supplied shaft extensions may be ordered from local
Ruskin supplier, part no. 10-020569-00B.
6. Zones should be split for equal airflow through each
damper.
1 Actuator
1 Actuator Per Damper
39M UNIT SIZE
10 12 14 17 21
12 12 12 12 12
41 41 53 58 70
42 52 64 69 87
20/ 20/ 21/ 23/ 28/
24 24 32 35 41
62 83 90 94 136
55/ 69/ 105/ 127/ 162/
41 41 53 58 70
39M UNIT SIZE
50 61 72 85 96
18 18 N/A N/A N/A
187 235 187 226 226
236 283 283 329 371
75/ 94/ 101/ 118/ 133/
112 141 151 177 200
275 332 406 474 532
280/ 338/ 546/ 639/ 721/
171 203 253 295 334
Refer to Fig. 26 and install
1 / -in. grey foam gas-
2
Factory duct collars and damper assemblies are for attach-
ing ductwork only and must NOT be used to support the
duct's weight. Weight bearing deflection can increase
torque necessary to operated dampers, or bind them pre-
venting any movement.
ZONE DAMPER LINKAGE (Fig. 26 and 27) — Note
damper control levers and a common operating bar are facto-
ry installed on upper end of damper shafts on top of zoning
damper assembly. To facilitate the installation of field-sup-
plied damper operators, the operating bar may be cut and the
control levers repositioned as follows:
25
12
77
Damper operation may be impaired if ductwork is
98 supported by the unit.
31/
1. Check job prints to determine number and size of zones
46
required and damper operator locations.
2. Cut and remove portion of operating bar between zones
150
as required.
178/
3. Install actuators on field-fabricated support brackets.
77
Connect actuator linkage to the center axle of intercon-
necting zones.
110
4. Adjust actuator for correct damper operation. Be sure
actuator, linkage, and dampers operate freely. See
N/A
Table 20 for operating torque requirements.
381

Mixing Box/Filter Mixing Box Damper Linkage

422
152/
228
It is important to properly link the outdoor-air and return-
604
air dampers. Failure to do so may cause mixing problems,
stratification, or coil freezing under some conditions, espe-
819/
cially in combination type filter mixing boxes.
379
Refer to Fig. 28 for typical damper arrangement and con-
necting rod position.
CONTROL DAMPERS — Control dampers may be operat-
ed with pneumatic or electric actuators. These items should
be set up in accordance with the control manufacturers instal-
lation instructions.
DAMPER LINKAGE ADJUSTMENT — After
handling unit has been powered, the dampers should be
checked to ensure they move freely and close tightly, adjust-
ment of the linkage may be required.
LINKAGE ADJUSTMENT
1. With the damper actuator unpowered and the damper
linkage disconnected, rotate the outdoor-air damper so
that it is fully closed. Make sure the spring return actua-
tor has completed its stroke (with power disconnected
this will be achieved). The return-air damper should be
fully open at this point.
2. Tighten the actuator on the damper jackshaft, ensure all
linkage is connected, secure and moves freely.
3. With power applied to the actuator, check for a complete
stroke and free movement in the dampers and damper
linkage.
.
Dampers and linkage must be checked prior to applying
power. Make certain that there are no obstructions that
could interfere with the operation of the dampers.
59
CAUTION
CAUTION
CAUTION
the
CAUTION
that
air-