Application:
Taco Electronic Ball Valve (EBV) Zone Valves provide on-
off, normally open or normally closed control in closed
hot water systems. The valves can be used in a wide vari-
ety of heating applications, primarily designed for use
with fan coils, radiators, convectors, air handlers and
radiant applications. Refer to the Product Specifications
section for choosing the correct style valve for your
application.
The Energy Storage Principle:
The Taco Electronic Ball Valve (EBV) Zone Valve is a gear
driven, capacitor powered valve. EBV technology replaces
the typical spring (mechanical energy storage device) with
a Prostar Capacitor (electronic energy storage device) for
returning the valve to its normal position. In addition, we
have replaced the typical synchronous AC motor with a
high torque, high efficiency and highly reliable miniature
motor. All functions of the Zone Valve’s operation are
monitored on board by a powerful microprocessor. A non-
contact optical sensor (electronic eye) monitors the valve’s
position at all times. In the event of a loss of power to the
valve, the EBV has a built-in override button located on
the top of the operator for manual operation of the valve.
As soon as power is restored the valve automatically finds
it’s correct operating position, even if the ball has been
moved using the manual override.
Ease of Installation / Operation:
The EBV is the most technologically advanced zone
valve ever made. It’s also simple to install and operate.
The valve can be installed in any direction, in any ori-
entation. Based on the success of Taco 570 zone valve,
the EBV utilizes a dependable
1
⁄
4
turn one-handed twist
lock for operator removal (see figure C). We then went a
step further, allowing the operator to be mounted to the
valve body in either direction (see figure A), great for
those tight baseboard jobs. Snap-in quick connects on
the back of the valve make for a secure and fast hook-up.
A green LED light shows full functionality of the valve’s
operation and thermostat status. As noted above, under
a no power situation the manual override button locat-
ed on the top of the valve allows the ball to be rotated to
any position and is also marked with an arrow to indi-
cate the position of the valve.
Valve Installation:
1. Valve body may be installed in any position, in
any orientation (see Figure A).
2. Before mounting body, refer to Figure B and
Dimensions Section for clearances.
3. Use of a solder with a melting point below 600°F
is recommended. Do not overheat! Make sure the
ball valve is in the FULL OPEN position during sol-
dering. Direct flame tip away from the center of
the valve. Cool valve quickly with a wet rag.
4. Solder build-up on the ball valve may prevent
proper opening and closing of the valve. Rotate
the manual operation button several times to
loosen any possible build-up.
5. Valve body can be submerged for leak testing
before the operator is attached.
Operator Installation / Wiring:
1. Valve operator may be attached to the valve body
in either direction (see Figure A).
2. Operator removal: Remove valve operator prior to
soldering by rotating the operator counterclock-
wise approximately 30 degrees and lifting upward
approximately
3
⁄
4
” (see Figure C).
Instruction Sheet
Electronic Ball Valve (EBV) Zone Valve
102-111
SUPERSEDES: 102-111, Dated August 1, 2003
EFFECTIVE: June 1, 2006
Plant ID# 001-1011
WARNING: Operator must be removed
from the valve body before soldering.
Ball valve must be in the full open posi-
tion before soldering. Valve shipped in
the closed position.
Figure A
Two Position Head Placement.
Universal Body Placement.
May be installed in any position, any orientation.
1
1
⁄
2
" MIN.
OPERATOR
REMOVAL
CLEARANCE
W
A
L
L
Figure B
