CGAM Pump Package VFD

Issue:

CGAM Pump Package VFD

Resolution:

The CGAM pump package built in Pueblo, CO comes standard with a single VFD, the Trane TR200.

There is no option or DSPA available to provide a second VFD.

The VFD can be used to balance the system in a constant flow application.

The VFD can also be used in a variable primary flow system.

It accepts a field supplied input signal to control the pump flow.

The signal required is 0 - 10 VDC.

Termination points are 1X7-1 (positive) and 1X7-2 (negative), which can be found inside the control side of the electrical panel (see drawing below).

If the VFD fails, the pumps will shut down.  There is no bypass.

To see the location of the VFD, click here.

For information on the pump package, see Do you have any details on the pump package?.

Notes:

There is no option for a balancing valve instead of the VFD.

Changes:

Other Question/Problem/Cause Statements:

• Does the pump package come standard with a VFD?
• Do we provide a single vfd or two vfds on the pump package option?
• What happens if the VFD on the pump package fails?
• Does the VFD have to be used for variable flow?
• Can the VFD on the pump package be used for variable flow?
• Can the chiller control the speed of the pump?
• Can the CH530 control the speed of the VFD provided with the pump package?
• Can the chiller control the speed of the VFD?
• Variable Primary Flow

Facts:

• Air-Cooled Chiller (Pueblo) (CGAM 20-130 Ton)

Document Identifier: DOC-97277