Taco Zone Sentry Instruction Sheet

Application:

Taco Zone Sentry Zone Valves can be used in a wide vari­ety of heating and (non condensing) cooling applications,
primarily designed for use with baseboard, fan coils, radia­tors, convectors, air handlers, heat pumps and radiant
applications. Refer to the Product Specifications section for
choosing the correct style valve for your application.

General Installation Information / Operation:

The Zone Sentry is the most technologically advanced
zone valve ever made. It’s also simple to install and oper­ate. The valve body can be installed in any position and
in any orientation. The actuator’s electrical connections
must be mounted over the port that requires flow when
power is applied to the actuator. (See Figure 1.) The back
of the valve makes 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°.

Before mounting the body refer to Figure 2 for any clear­ance requirements.

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 to the port that is being sol­dered. Direct flame tip away from the center of the valve.
Cool valve quickly with a wet rag to prevent overheating.

Solder build-up on the ball valve may prevent proper
opening and closing of the valve.

Valve body may be submerged for leak testing before the
actuator is attached.

Step by Step Valve Installation:

1. Remove actuator from the valve body. Push in and
hold the release clip at the front of the actuator, pull

the actuator away from the body (approx.

3

⁄4"). (See

Figure 3.)

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 techniques 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 position, 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.

Instruction Sheet

Zone Sentry 3-way Diverting Valve

102-426

SUPERSEDES: New EFFECTIVE: April 1, 2011

Plant ID# 001-3997

CAUTION: Actuator must be removed from
the valve body before soldering (see
Figure 3). Ball valve must be in the full open
position to the port that is being soldered.

13⁄8" CLEARANCE

3

⁄4" CLEARANCE

W

A

L

L

Figure 2

A

C

B

A

C

B

CALL

CALL

NO CALL

NO CALL

ELECTRICAL

CONNECTION

ELECTRICAL

CONNECTION

Figure 1

L

OCKING

POST

Step 1:
Push in and hold
release clip at the
front of the actuator.

Step 2:
Move actuator away from the
valve body approximately 3⁄4"
to disengage locking posts
and stem.

Figure 3: Operator

Removal

CAUTION: Installation should only be per­formed by a qualified professional.

Installing the Actuator on the Valve Body:

1. Position the actuator so that the “D” shaped valve
stem aligns with the “D” shaped drive cavity in the
operator

2. Slide the actuator onto the valve stem and rotate to
align the valve’s 2 locking posts with the mating
holes in the actuator. Push in the release clip and
slide the actuator down flush to the valve body.

3. Verify that the actuator is locked by pulling it away
from the valve body without pushing in the clip.
(Do not use excessive force.)

Mode of Operation:

1. Upon initial field installation the capacitor requires
a full charge, up to 25 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 thermostat 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.

WARNING: Do not use zone valves on indirect
water heaters without a tempering device.

Product Specifications:

Maximum Operating Pressure: 300 PSI (2,100 kPa)
Maximum Shutoff Pressure: 125 PSI (875 kPa)
Fluid Temperature Range: 20° to 240°F, (-7° to 115°C) @ 135°F (57°C) ambient
Service: Closed systems

Optional open system configuration (high oxygen content)
Up to 50% Glycol

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 max
Power Consumption, Power On: 1.44 Watts, 0.06 Amps max
Heat Anticipator Setting: 0.5 Amps
End Switch Rating: 1 Amp @ 24 VAC

Materials of Construction, Actuator:

Body: High Performance Engineered Polymer
Gears: High Performance Internally Lubricated Engineered Polymer

Materials of Construction, Valve:

Body: Forged Bronze
Stem: Brass
Press Ring: Brass
Ball: Brass (Chrome Plated)

Seat: Modified Teflon

®

O-rings: EPDM