Application:
Taco Zone Sentry Zone Valves provide on-off, normally
open or normally closed control in both open and closed
hot or chilled water systems. The valves can be used in a
wide variety of heating and cooling applications, pri-
marily designed for use with fan coils, radiators, convec-
tors, air handlers, heat pumps and radiant applications.
Refer to the Product Specifications section for choosing
the correct style valve for your application.
Ease of Installation / Operation:
The Zone Sentry is the most technologically advanced
zone valve ever made. It’s also simple to install and oper-
ate. The valve can be installed in any direction, in any
orientation. We then went a step further, allowing the
operator to be mounted to the valve body in either direc-
tion (see Figure A), great for those tight baseboard jobs.
Snap-in quick connects on the back of the valve make
for a simple, secure and fast wiring hook-up. A green
LED light shows full functionality of the valve’s opera-
tion and thermostat status. Under a no power situation
the manual override button located on the top of the
valve allows the ball to be rotated up to 90° and is also
marked with a slot to indicate 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 the body, refer to Figure B for
any clearance requirements.
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 the valve operator
prior to soldering by pushing in and holding the
release clip at the front of the operator and lifting
upward approximately
3
⁄
4
"
(see Figure C).
3. To re-assemble the operator to the valve body:
Position operator such that the “D” shaped valve
stem aligns properly with the “D” shaped operator
drive cavity. (Note: The “D” shaped stem design
allows for correct insertion every time.) Next, slide
the valve stem into the operator cavity, push in
and hold the release clip until the operator slips
over the valve locking posts (see Figure C). Once
the operator is flush to the valve body, let go of
the release clip. Using very little force, try to take
Instruction Sheet
Zone Sentry Zone Valve
102-410
SUPERSEDES: November 1, 2009
EFFECTIVE: October 15, 2010
Plant ID# 001-3944
CAUTION: Operator must be removed from the
valve body before soldering (see Figure C). Ball
valve must be in the full open position before
soldering. Valve shipped in the closed position.
Two Position Head Placement.
Universal Body Placement.
May be installed in any position, any orientation.
AA
BB
Figure A
1
3
⁄
8
" CLEARANCE
3
⁄
4
" CLEARANCE
W
A
L
L
Figure B
NOTE: Some power robbing thermostats require
the use of a resistor (always use the resistor pro-
vided by the thermostat manufacturer with the
Zone Sentry). Consult the thermostat instructions
for the resistor installation.
