Taco Comfort Solutions Geo-Sentry V100C3G1ZA024Q4A2 User manual

Application:
The eo-Sentry®Zone Valve provides on-off control and is avail-
able in normally open or normally closed configurations. It is espe-
cially suited for use in either open or closed loop geothermal sys-
tems with water source heat pumps.
Ease of Installation / Operation:
The eo-Sentry®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 orientation except for chilled water
installations (see Figure B). We then went a step further, allowing the
actuator to be mounted to the valve body in either direction (see
Figure A). 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 operation 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.
2-Way Valve Installation:
1. On hot water applications, the valve body may be installed in any
orientation. On chilled water installations, do not install with the
actuator beyond 85° from the topmost position (see Figure B).
2. Before mounting the body, refer to Figure C for any clearance
requirements.
3. Use of a solder with a melting point below 600°F is recommend-
ed. Do not overheat! Make sure the ball valve is in the FULL
OPEN position during soldering. Direct flame tip away from the
center of the valve. Cool valve quickly with a wet cloth.
4. Solder build-up on the ball valve may prevent proper opening
and closing of the valve. Actuate the actuator once or twice and
make sure the valve rotates fully.
5. Valve body can be submerged for leak testing before the actu-
ator is attached.
Actuator Installation / Wiring:
1. Actuator Removal: Remove the valve actuator prior to soldering
by pushing in and holding the release clip at the front of the
actuator and lifting upward approximately 3⁄4" (see Figure D).
2. To re-assemble the actuator to the valve body: Position actuator
such that the “D” shaped valve stem aligns properly with the “D”
shaped actuator drive cavity. (Note: The “D” shaped stem
design allows for correct insertion every time.) Next, slide the
Instruction Sheet
Geo-Sentry®Geothermal Zone Valve
102-479
SUPERSEDES: November 1, 2013 EFFECTIVE: October 19, 2017
Plant ID# 001-4131
Two Position Head Placement.
Universal Body Placement.
May be installed in any position, any orientation.
AAB B
Figure A
13⁄8" CLEARANCE
3⁄4" CLEARANCE
W
A
L
L
Figure C
NOTE: Some power robbing thermostats require the use of
a resistor (always use the resistor provided by the thermo-
stat manufacturer with the Zone Sentry). Consult the ther-
mostat instructions for the resistor installation.
Permitted Angle of Installation on Chilled Water Applications
85°
85°
Figure B
LOCKING
POST
Step 1:
Push in and hold release clip
at the front of the actuator.
Step 2:
Move actuator upward
approximately 3⁄4" to
disengage Locking Posts.
Figure D: Actuator
Removal
CAUTION: Sand or other contaminants can damage
the valves internal components and cause it to fail
prematurely. Precautions must be taken to prevent
contaminants from damaging the valve.
CAUTION: Actuator must be removed from the
valve body before soldering (see Figure D). Ball
valve must be in the full open position before sol-
dering. Valve shipped in the closed position.
NOTE: Threaded valves (2-way and 3-way) should be
installed using proper plumbing techniques for NPT threads.

valve stem into the actuator cavity, push in and hold the release
clip until the actuator slips over the valve locking posts (see
Figure D). Once the actuator is flush to the valve body, let go of
the release clip. Using very little force, try to take the actuator off
of the valve body without using the release clip. Both locking
posts should be firmly attached to the actuator. If the actuator
slides up the stem, repeat the assembly process.
3. Changing the actuator orientation: The actuator may be attached
to the valve body in either direction (see Figure A). In order to
reverse the actuator orientation on the valve body, see the actu-
ator removal instructions in Step 1 with the following exceptions.
Instead of moving the actuator the full 3⁄4", move it just high
enough to clear the locking posts, rotate the actuator 180° and
reinstall it on the locking post by following the previous instruc-
tions for reassembling the actuator.
4. The plug-in quick connects can be disconnected from the valve
actuator for ease of wiring. Insert the corresponding wire into the
quick connects and tighten by turning the screw.
Mode of Operation:
1. Upon initial field installation the capacitor requires a full charge,
up to 35 seconds, before the valve starts to turn. Charging time
will vary (typically less) during normal operation.
2. When the capacitor is charging the green LED light will FLASH.
3. Once the capacitor is charged, the green LED will stop flashing
but remain ON. At this point the valve’s actuator will rotate the
ball valve. The green LED will remain ON as long as the ther-
mostat is calling (the unit is powered).
4. Once the thermostat is satisfied the green LED will turn OFF and
the valve will rotate 90° into its normal position or non-powered
position. For example: If the actuator is an NC (normally closed)
version, the actuator would open the valve when the thermostat
calls. Once the thermostat is satisfied the actuator would then
rotate the valve 90° to its normally closed position.
3-Way Valve Installation:
On hot water applications, the valve body may be installed in any
orientation. On chilled water installations, do not install with the
actuator beyond 85° from the topmost position (see Figure B).
1. Remove actuator from the valve body per previous instructions.
(See Actuator Installation / Wiring and Figure D).
2. Open the valve to the full open position of the first port to be
soldered (port A or B).
3. Clean and prepare the valve and pipe using the proper tech-
niques required prior to soldering.
4. Fit the valve into the piping system.
5. Solder the port of the valve that you placed in the full open posi-
tion, directing the flame away from the center of the valve.
6. Turn the opening of the valve to the second port to be soldered.
(the opposite port of the one just completed.)
7. Repeat step 5 for the second port.
8. Solder the third port (bottom port). This port is always in the full
open position.
9. Immediately cool the valve with a wet towel.
10. Reassemble actuator to the valve body per previous instruc-
tions. (See Actuator Installation / Wiring) and Typical
Installations for 3-Way Valves Figures E and F).
WARNING: Do not use zone valves on indirect
water heaters without a tempering device.
CAUTION: Do not jumper power/motor (24 VAC)
connection terminals, even temporarily. This may
cause damage to the thermostat’s heat anticipator.
Figure E: Typical Installations for 3-way Valves
Normally Closed to the Load
LOAD
LOAD
SUPPLY
SUPPLY
SUPPLY
SUPPLY RETURN
RETURN
FLOW ON
NO CALL
FLOW ON
NO CALL
FLOW ON
CALL
FLOW ON
CALL
E
ELECTRICAL
CONNECTION
E
ELECTRICAL
CONNECTION
Figure F: Typical Installations for 3-way Valves
Normally Open to the Load
LOAD
LOAD
SUPPLY
SUPPLY
S
SUPPLY
SUPPLY RETURN
RETURN
FLOW ON
NO CALL
F
FLOW ON
NO CALL
FLOW ON
CALL
FLOW ON
CALL
F
ELECTRICAL
CONNECTION
E
ELECTRICAL
CONNECTION
NOTE for 3-Way: The actuator’s electrical connections must
be mounted over the port that requires flow when power is
applied to the actuator. See Figures E and F.
Flow Coefficients and Maximum Close-Off Pressure:
* At 4' per second (maximum recommended flow rate is 8' per second).
VALVE
SIZE
2-Way
Cv(Kv)/Ft.
of PIPE EQUIV.*
CLOSE-OFF PSI
(kPa)
3-Way
Cv(Kv)/Ft.
of PIPE EQUIV.*
1⁄2" 4.9 (4.3) / 9.5
0-125 psi
(0-862 kPa)
1.5 (1.3) / 111
3⁄4" 10.3 (8.9) / 8.4 3.3 (2.8) / 82
1" 8.9 (7.7) / 47.4 3.0 (2.6) / 411

A
D
C
F
E
B
G
H
13⁄8" CLEARANCE
3⁄4" CLEARANCE
W
A
L
L
13⁄8" CLEARANCE
3⁄4" CLEARANCE
W
A
L
L
Dimensions (for reference purposes): English dimensions are in inches. Metric dimensions are in millimeters. Metric data is presented in ( ).
VALVE SIZE A B C D E
(Sweat)
E
(Threaded) F G H (3-Way)
1⁄2"
3 (76.2) 23⁄8(60.3) 41⁄8(104.8)
31⁄16 (77.8) 31⁄8(79.4) 33⁄4(95.3) 19⁄16(39.7) 25⁄16(58.7) 51⁄16 (128.6)
3⁄4"31⁄8(79.4) 35⁄16(84.1) 53⁄8(136.5)
1" 37⁄8(98.4) 37⁄8(98.4) 17⁄8(47.6) 51⁄2(139.7)
WARNING: Wiring connections must be made in accordance with all applicable electrical codes.
WARNING : To prevent electrical shock, disconnect electric power to system at main fuse or circuit breaker box until
installation is complete. When a service switch is installed, more than one disconnect switch may be required to
deenergize this device for servicing.
Geo-Sentry Zone Valve Wiring Diagrams:
NOTE: Some power robbing thermostats require the use of a resistor (always use the resistor provided by the ther-
mostat manufacturer with the Zone Sentry). Consult the thermostat instructions for the resistor installation.
R
C
W/YC END
SWITCH
THERMOSTAT HEAT PUMP
GEO-SENTRY
Field Wiring W/YC END
SWITCH
THERMOSTAT HEAT PUMP
GEO-SENTRY
Jumper
OPTIONAL WIRING DIAGRAM
O
Y
G
R
O
Y
G
R
O
Y
G
C
R
O
Y
G
Multi-status LED and Troubleshooting:
This troubleshooting table is intended as a helpful guide and is not all inclusive. There could be other causes and solutions for a non-
functioning product.
LED STATUS INDICATES POSSIBLE CAUSE POSSIBLE SOLUTION
Not Illuminated Power off No call
No power
Verify there is a call.
Check for voltage at the actuator.
Steady blink (once per
second) Charging
Solid Power on
Slow blink (once every
5 seconds)
Excessive
charging time
Not enough VA Reset the actuator (see note).
Use a larger VA transformer or add an additional transformer.
Too many valves per transformer Reduce the number of valves.
Use a different thermostat.
Double blink (twice
every 5 seconds)
Excessive
opening time
Obstruction in valve
Buildup of contamination in valve
Reset the actuator (see note).
Remove obstruction.
Clean the valve and/or system.
Replace valve.
Failed actuator Replace Actuator.
NOTE: Reset the actuator by removing power for 5 seconds and then restoring power.

Product Specifications:
Maximum Static Pressure: 300 PSI (2,100 kPa)
Maximum Shutoff Pressure: 125 PSI (875 kPa)
Maximum Ambient Temperature: 24V 135°F Multi volt 150° F
Fluid Temperature Range: 20° to 220°F, (-7° to 105°C)
For Indoor Use Only:
Service: Open and closed systems
15 PSI Steam Max
Fluids – Water
Up to 25% Ethanol
Up to 25% Methanol
Up to 50% lycol
Ball Rotation Speed: Full Open to Full Close (90° turn), 5 seconds (after charge time)
Full Close to Full Open (90° turn), 5 seconds (after charge time)
Seat Leakage: Drop-Tight Close-Off
Electrical Rating: 24 VAC, 60 HZ, 0.48 Amps
Do not use more than 12 zone valves per 40VA transformer.
Power Consumption, Charging: 11.4 Watts, 0.48 Amps
Power Consumption, Power On: 1.44 Watts, 0.06 Amps
Heat Anticipator Setting: 0.5 Amps
End Switch Rating: 1 Amp @ 24 VAC
NOTE: Some power robbing thermostats may cause a reduction of the number of valves possible per 40VA transformer.
Materials of Construction, Actuator:
Body: High Performance Engineered Polymer
ears: High Performance Internally Lubricated Engineered Polymer
Materials of Construction, Standard Valve:
Body: Forged Bronze
Stem: Brass
Press Ring: Brass
Ball: Brass (Chrome Plated)
Seat: Modified Teflon®
O-rings: EPDM
Taco, Inc. will repair or replace without charge (at
the company’s option) any product or part which
is proven defective under normal use within one
(1) year from the date code.
In order to obtain service under this warranty, it is
the responsibility of the purchaser to promptly
notify the local Taco stocking distributor or Taco
in writing and promptly deliver the subject prod-
uct or part, delivery prepaid, to the stocking dis-
tributor. For assistance on warranty returns, the
purchaser may either contact the local Taco
stocking distributor or Taco. If the subject product
or part contains no defect as covered in this war-
ranty, the purchaser will be billed for parts and
labor charges in effect at time of factory exami-
nation and repair.
Any Taco product or part not installed or operat-
ed in conformity with Taco instructions or which
has been subject to misuse, misapplication, the
addition of petroleum-based fluids or certain
chemical additives to the systems, or other
abuse, will not be covered by this warranty.
If in doubt as to whether a particular substance is
suitable for use with a Taco product or part, or for
any application restrictions, consult the applica-
ble Taco instruction sheets or contact Taco at
[401-942-8000].
Taco reserves the right to provide replacement
products and parts which are substantially simi-
lar in design and functionally equivalent to the
defective product or part. Taco reserves the right
to make changes in details of design, construc-
tion, or arrangement of materials of its products
without notification.
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DURATION OF THE EXPRESS WARRANTY
SET FORTH IN THE FIRST PARA RAPH
ABOVE.
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CIAL, INCIDENTAL, INDIRECT OR CONSE-
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LIMITED WARRANTY STATEMENT
A Taco Family Company
2017
®