Cooling - Chilled Water Modulating; Valve Piping - Daikin AVV Installation And Maintenance Manual

Cooling – Chilled Water Modulating

Valve Piping

2-way Modulating, Normally Closed,
Chilled Water Valve Piping (typical)
The 2-way Modulating chilled water valve is furnished
normally closed to the coil. When the valve is de-energized
(off) there is no flow through the coil. Energizing the valve
allows flow through the coil in a modulating fashion.
CAUTION
Refer to the arrow on the modulating valve body to determine the
direction of flow. If the valve is mounted improperly, the unit will
not operate properly and damage to the valve may result.
Figure 90: 2-Way Modulating Valve Control, Normally
Closed, Chilled Water Piping
Return
Balancing and Shutoff Valve
2-way Modu-
lating
Valve
Shutoff Valve
Supply
www.DaikinApplied.com
Unit Coil
Return
Supply
Unions
Figure 91: 2-Way Modulating, Normally Closed Chilled
Water Valve Piping
3-Way Modulating, Normally Closed,
Chilled Water Valve Piping (typical)
The 3-way Modulating chilled water valve is furnished
normally closed to the coil. When the valve is de-
energized (off) the flow bypasses the coil. Energizing the
valve allows flow through the coil in a modulating fashion.
Figure 92: 3-Way Modulating Valve Control, Normally
Closed, Chilled Water Piping
Return
Balancing and Shutoff Valve
Common
Balancing Valve
Shutoff Valve
Supply
35
3-way
Union
Modulating
Valve
Unit Coil
N .C .
Return
N .O .
Supply
Union
IM 817-7