User Guide

ManualsBrandsBarber Colman ManualsHVAC Replacement Parts3/4" Union Sweat 3-Way Mixing Valve (7.5 cv)

CHECKOUT

1. Make sure the valve stem operates freely before installing the valve linkage and the

actuator.

2. If the stem does not operate freely, it may indicate that the valve was twisted or crushed

during installation or that the stem was bent by rough handling. These conditions may

require that the valve be replaced.

3. After the piping is under pressure, check the valve body and the connections for leaks.

4. After the valve linkage and the actuator are installed, check their operation.

a. Drive the actuator and run the valve to the stem down position. Make sure the

linkage and valve stem move freely. At the stem down position, the valve should

shut off the “B” port.

b. Drive the actuator and valve to the stem up position. Again, the valve stem and

linkage should operate smoothly. At the stem up position, the valve should shut off

the “A” port.

MAINTENANCE

Regular maintenance of the total system is recommended to assure sustained performance.

See Table-6 for maintenance kit part numbers.

Table-6 Maintenance Kits for VB-7314 Valves.

Water System

Maintenance

All heating and cooling systems are susceptible to valve and system problems caused by

improper water treatment and system storage procedures. These guidelines are provided to

help avoid valve and water system problems resulting from improperly treated water or

storage procedures in cooling and hot water systems, and to obtain maximum life from TAC

valves.

Durability of valve stems and packings is dependent on maintaining non-damaging water

conditions. Inadequate water treatment or filtration, not in accordance with chemical

supplier/ASHRAE handbook recommendations, can result in corrosion, scale, and abrasive

particle formation. Scale and particulates can result in stem and packing scratches and can

adversely affect packing life and other parts of the hydronic system.

To maintain non-damaging conditions, follow these guidelines:

• Clean the system prior to start up. Use a nitrite or molybdate-based treatment program.

• Use filtration equipment where needed.

• Properly store off-line systems and monitor water treatment results using corrosion test

coupons.

• Follow the advice of a water treatment professional.

• Consult EN-205, Water System Guidelines Engineering Information, F-26080, for

further details.

Valve Body

Part Number

Replacement

Packing

Assembly

Packing

Wrench

Valve Repair

Kit

Tail PIece Union Nut

VB-7314-0-4-2

YBA-622-1 TOOL-20-1

RYB-731-2

YBA-657-4 YBA-656-4

VB-7314-0-4-4 RYB-731-4

VB-7314-0-4-6 RYB-731-6 YBA-657-6 YBA-656-6

VB-7314-0-4-8 RYB-731-8 YBA-657-8 YBA-656-8

VB-7314-0-4-9 RYB-731-9 YBA-657-9 YBA-656-9

VB-7314-0-4-10 RYB-731-10 YBA-657-10 YBA-656-10

VB-7314-0-4-11 RYB-731-11 YBA-657-11 YBA-656-11

Kit includes replacement packing and stem & plug assembly.