Common Questions - Emerson Vilter VSS Installation, Operation & Maintenance Manual

ICM/ICAD Motorized Valve

Common Questions

Danfoss · Refrigeration & Air-Conditioning Division · 7941 Corporate Drive · Baltimore, MD 136
Ph 410-931-850 · Fax 410-931-856 · E-mail: baltimore@danfoss.com · Internet: www.danfoss.com/North_America
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Installation, Programming, and Troubleshooting
What happens in the event of a power failure?
The ICAD will remain in the position it is in when power is lost. There are two ways to
address this condition:
• Add a UPS (Uninterruptible Power Supply) to the power wiring. This is easily
accomplished with the green and white wires in the power cable. A UPS is
available from Danfoss. The UPS can provide service for up to 9 ICAD 600's or up
to 6 ICAD 900's.
Note: The UPS is not a continuous power supply. It is used to change the valve
position (usually to close the valve) in the event of a power failure. Therefore, the
system is not to be run in the UPS mode.
• Add a solenoid valve in front of the ICM. This is a very simple solution provided
that there is no issue associated with the additional pressure drop through the
solenoid valve.
How much power do I need to supply to the ICAD?
The total power required depends on both the ICAD size and the number of ICAD's powered
by the DC power supply. The power for each ICAD is:
• For the ICAD 600 (used on ICM 0, 5, and 3), the power requirement is
approximately 30 W
• For the ICAD 900 (used on ICM 40, 50, and 65), the power requirement is
approximately 50 W
How can I monitor the valve position remotely?
The control wiring provides for a 4 to 0 mA or 0 to 0 mA signal output (blue and yellow
wires). This signal can be sent to:
• A remote display
• A PLC or PC
• Another ICAD motor to give the same opening position
DKRCI.EI.HT0.A1. / 50H1639
 Danfoss (USCO / MKS), 11- 006