User Guide

10 © Copyright 2008 TAC All Rights Reserved. F-27197-4
Valve Valve
Coil
Return
Bypass
Supply
AB
AB
Coil
Return
Bypass
Supply
AB
AB
Stem Position Flow
Up Through Coil Bypass
Down Through Coil
Stem Position Flow
Up Through Coil
Down Through Coil Bypass
Note: A label on the side of the
valve provides port identification
Figure-6 VB-8303 Typical Piping for Control of Heating or Cooling Coil
Boiler
Return
Bypass
Supply
System
Pump
AB
AB
Stem Position Flow
Up Through Boiler
Down Through Bypass
Note: A label on the side of the
valve provides port identification
Figure-7 VB-8303 Typical Boiler Hot Water Reset