Greenheck CRD-1 User Manual

Volume Controller

For CRD-1, -1LP, -1WJ, -1WT & 2

Greenheck’s volume controller option allows adjustment of damper blades to balance airflow. This option is factory
mounted and is available with 165°F or 212° F (74°C or 100°C) fusible links. The fusible link is easily replaceable in
the field. The volume controller extends 1 in. (25mm) below the frame on CRD-1 and CRD-1LP models and ¾ in.
(19mm) on CRD-2 when standard frame is selected. If the volume controller can not extend past the frame, select a
bottom frame extension.

High tensile .105 in.
(2.7mm) diameter

16 ga. (1.6mm)
reinforced mounting
bracket

Link temperature and
date code stamped on
outside face of link

stainless steel wires

Grade 8 3/16 in. (4.8mm) hex socket screw for
adjustment

Fusible link assy.

US Patent number 6644337

A*

* This dimension is for standard frame only. CRD-1 standard frame is 2 11/16 in. (68mm). CRD-2 standard frame is 3 7/16 in.
(87mm). The volume controller extends 1 in. (25mm) below the frame.

Copyright ©2010 Greenheck Fan Corporation
Volume Controller for CRDs Rev. 4 Sept 2010