Install Instructions

VBN2, VBN3 CONTROL BALL VALVES WITH THREADED CONNECTIONS
62-2009 2
Preparation
CAUTION
Equipment Damage Hazard
Foreign particles like dirt and metal chips can
damage the ball seals.
For trouble-free operation of the product, good
installation practice must include initial system
flushing, and chemical water treatment. Clean the
lines upstream of particles larger than 1/16 inch
diameter (welding slag, pipe scale, sand and other
suspended particulate). Use of a 50 micron (or
finer) system side stream filter is suggested.
Remove all filters before flushing.
Do not use boiler additives, solder flux and wetted
materials which are petroleum based or contain
mineral oil, hydrocarbons, or ethylene glycol
acetate. Compounds which can be used, with
minimum 50% water dilution, are diethylene
glycol, ethylene glycol, and propylene glycol
(antifreeze solutions).
If installing these valves in an addition to, or
retrofitting an existing building, do not assume that
the fluid in the existing piping meets these criteria.
IMPORTANT:
Hold valve with pipe wrench by hexagonal fitting
ONLY. Do NOT handle the valve body with the
pipe wrench; product damage may result.
1. Clean the lines upstream of particles larger than
1/16 in. diameter (welding slag, pipe scale and
other contaminants).
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.
IMPORTANT
Flow arrows must point in the direction of the
flow for proper operation.
NOTE: For three-way valve mounting, see Fig. 1 and 2.
Fig. 1. Three-way ball valve flow orientation
(not to scale).
Fig. 2. Three-way mixing valve operation
with coil bypass.
Fig. 3. Boiler bypass for reset control.
Fig. 4. Supply mixing for reset control.
M13737
SUPPLY
RETURN
AB PORT A PORT
B PORT
COIL
SUPPLY
RETURN
AB PORT A PORT
B PORT
COIL
MIXINGDIVERTING
AB A
B
M13749
HEATING COIL
FULL
HEAT
5 GPM
5 GPM
2.5 GPM
5 GPM
AB A
B
PROPORTIONED
HEAT
2.5 GPM
SUPPLY
MAIN
RETURN
MAIN
5 GPM
5 GPM
AB
VBN3
VBN3
VBN3
A
B
NO
HEAT
NO FLOW
THROUGH COIL
AB
A
B
M13736A
BOILER
PUMP
VBN3
MIXED
DISCHARGE
WATER TO
HEAT LOAD
BYPASS
AB
AB
M13735A
BOILER
PUMP
VBN3