Honeywell vbn3 User Manual

62-0197-04

1. Read these instructions carefully. Failure to follow 

them could damage the product or cause a 
hazardous condition.

2. Check ratings given in the product data literature 

and on the product to ensure the product is suit-

able for your application.

3. Installer must be a trained, experienced, licensed 

service technician.

4. After installation is complete, check out product 

operation as provided in these instructions.

damage the ball seals.
Clean upstream lines prior to installation.

Use neither aerosol products nor petroleum-
based lubricants.

1. Clean the lines upstream of particles larger than 

1/16 in. diameter. Open valves fully. Flush entire 
hydronic system of contaminants (welding slag, 

solder, scale, metal chips, etc.) and chemically 
treat water according to local conditions prior to 
operation. 

2. Proceed with installation once the system specifics 

(expansion/contraction of the system and its 

medium as well as operating pressures) are within 
tolerances.

3. Eliminate air from system.
4. Two-way valves are marked to show flow direction.

NOTE: For three-way valve mounting, see Fig. 3 

through 5.

5. Stem rotation:

a. For two-way valves:

(1) Clockwise to close.
(2) Counterclockwise to open.

b. For three-way valves:

(1) Clockwise to increase B to AB flow.
(2) Counterclockwise to increase A to AB flow.

6. Valve must be mounted with the actuator/bracket 

above the valve body. Do not install the valve with 
the stem below horizontal or upside down. (See 
Fig. 1 and 2.)

M29518

85

85

M29519A