MK Plastics Axijet IO&M - Manual (Page 4)

Page 4
Axijet Combined Fan and Plenum Equipment Support Assembly
1. Mount the isolators on the Axijet fan isolation support bracket (this bracket is only available on steel Axijet fans,
on FRP Axijets the isolators will be mounted onto isolator holes on the underside of the fan stand).
2. Place the fan isolator assembly on the fan support section of the fan/plenum curb assembly. The centerline of
the fan’s isolation rails should line up with the centerline of the 8” wide internal fan supports – (see Fig No. 6).
Please refer to the ‘Combined Fan/Support Detail’ drawing that is part of the submittal for further details.
3. Place the plenum on top of the curb section of the fan/plenum curb assembly.
4. Line up the fan inlet with the isolation damper inlet transition, (round collar/sleeve), which is attached to the ple-
num.
5. Adjust and set the vibration isolator to correct operational height – (for further details, see spring vibration isola-
tor assembly instructions – page 6).
6. Once the fan inlet sleeve and isolation damper sleeve are aligned, (there should be about a 4” gap between the
two sleeves), attach the PVC flexible connector. The flexible connector, when attached, should have some slight
slack to it. A set of stainless steel adjustable straps are included with the connector for attaching to both sleeves.
7. When the vibration isolators are in the correct location, drill 5/16” dia. pilot holes through the anchorage slot
holes of the isolators to about 1/1/2” depth.
8. To prevent water penetration, fill in the entire pilot hole with a waterproof, external grade silicone caulk.
9. Secure the isolators down with 2-1/2” long by 1/2” dia. self-tapping steel lag screws. Some of the caulking will be
forced out of the hole to form a barrier around the fixing.
10. Finally, caulk all around the base of the isolators to form a complete watertight seal.
Refer to Fig. 5 & Fig. 6 for the following instruction.
Note: In certain applications where seismic activity is a concern, special seismic equipment supports can be supplied,
in this case it is recommended that ‘toggle-bolts’ be used instead of lag screws for securing the fan onto the rails.
Fig. 6 – Combined Support Rail Fixing Detail
Fig. 5 - Combined Support Layout