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Fan flange
Fan flange
Minimum 1 inch
(25.4 mm) flange
1/4 inch (6.25 mm) carbon
or stainless steel bolts
1/4 inch (6.25 mm)
carbon or stainless steel
bolts
Welded companion flange or
1x1x1/4 inch (25.4x25.4x6.25
mm) angle
Gasket rated for
1500
o
F (815
o
C)
Sealant rated for
1500
o
F (815
o
C)
Over-lapping Connection
Sealant Connection
Cleaning, Maintenance and Repair
Cleaning of Internal Components
• Entire wheel should be cleaned during routine duct cleaning. Partial cleaning may result in an unbalanced wheel
that can cause premature bearing failure or excessive vibration.
• Grease / cleaning solution should drain freely through the provided drain connection. Remove any obstructions
inhibiting proper drainage.
• Only the access door is removed during routine duct cleaning. The bearing cover is not removed during routine
cleaning. The bearing cover is removed only when inspecting or changing the bearings, fan shaft or driven pulley.
Bearing Lubrication
See bearing manufacturer’s instructions or label on the fan housing for lubrication schedule. Lubricate bearings
with high temperature grease conforming to NLGI grade 2 such as Mobil Mobilith SHC 100 or 200.
Sealant / Gasket / Seal Replacement
Fan to Duct Sealant / Gasket Replacement
Repair or replace sealant / gasket as needed. Replacement sealant or gasket shall be rated for 1500
o
F (815
o
C) and
shall be grease tight such as 3M Fire Barrier 2000+ Silicone Sealant. See Sealant and Over-lapping Connection
figures for proper installation.
Access Door / Bearing Cover Gasket Replacement
Replace access door or bearing cover gasket material as needed. Gasket material for the access door is 1/2 x 1/2
inch (12.7 x 12.7 mm) Greenheck part number 220145. Gasket for the bearing cover is 1/8 x 1/2 inch (3.17 x 12.7
mm) Greenheck part number 220144. Both items are ordered by the foot.
Mechanical Seal
A mechanical seal, located inside the bearing cover, is used to keep grease from penetrating into this area. Contact
Greenheck with the fan’s serial number for appropriate sizing and part number for a replacement mechanical seal.
Refer to the TCB IOM (PN 456557) for other maintenance procedures.
TCB with UL-762 Supplement IOM
Rev. 1 March 2004
Copyright © 2004 Greenheck Fan Corp.
• Inline fans shall be connected to the exhaust duct by flanges securely bolted as shown in the figures below
(NFPA 96). Flexible connectors shall not be used. Units supplied with matching companion flanges are to have
this part welded to the ductwork and then bolted to the fan. Gaskets used in the Over-lapping Connection style
shall not be positioned in a manner to have direct contact with the grease.
Installation Practices (Continued)
Airflow