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Series 3ZV1 Three-Way Zone Valves
B
By Dwyer
Specications - Installation and Operating Instructions
A
Bulletin V-26
C
SizeAin (mm)Cin (mm)Bin (mm)
1/2˝
3/4˝
1˝
4.57 (116)
4.69 (119)
4.92 (125)
2.48 (63)
2.48 (63)
2.48 (63)
3.54(90)
3.66 (93)
3.74 (95)
Series 3ZV1 Three-Way Zone Valves are ideal for ow control in hot and cold water
HVAC systems. The 3ZV1 is electrically driven to open and spring to close. Units are
available in 1/2˝, 3/4˝, and 1˝ sizes with 24 or 120 VAC power supply. Easy to install
these units are direct replacements for competitor units. Manual override lever is easily
accessible externally. Consult factory for 220 VAC power supply, optional auxiliary
switches, and BSP or sweat connections.
MODEL CHART
Model Cv Size
3ZV1022
3ZV1024
3ZV1032
3ZV1034
3ZV1042
3ZV1044
Instructions for Operation
Normally-closed 2-way and diverting 3-way valve are installed as Figure 1, 2 and 3
shows. For high building, pressure –reducing valves should be installed on branch
pipes at ground oor.
Note: When the valve is mounted on a horizontal pipe, the angle must be positioned
less than 85° (see Figure 4).
When the valve is mounted on a vertical pipe, prevent from dripping. Manual operating
lever: Move the manual operating lever slowly and hold in the retaining notch, and then
the valve is in normal-opened position. When the valve is rst powered on, the lever
goes back to the automatic position again.
3.78
3.78
3.78
3.78
8.02
8.02
1/2˝
1/2˝
3/4˝
3/4˝
1˝
1˝
Supply
Voltage
120 VAC
24 VAC
120 VAC
24 VAC
120 VAC
24 VAC
Close-off Pressure
psi (bar)
22 (1.5)
22 (1.5)
14.5 (1.0)
14.5 (1.0)
10 (.70)
10 (.70)
SPECIFICATIONS
Service: Compatible uids.
Body: 3-way.
Line Size: 1/2˝ to 1˝.
End Connections: Female NPT (optional BSP, sweat connections).
Pressure Limits: Maximum: 300 psi (20.7 bar); Close-off: See model chart.
Temperature Limits: Ambient: 32 to 104°F (0 to 40°C); Process: 32 to 201°F (0 to
94°C).
Wetted Materials: Brass, SS, NBR.
Flow Characteristic: Quick opening.
Power Requirements: 120 VAC or 24 VAC, ±10%, 50/60 Hz. (optional 220 VAC).
Power Consumption: 6.5 W.
Input: On/off.
Electrical Connection: 22 AWG, 5˝ (127 mm) long.
Cycle Time: Opening time: 11 s; Closing time: 5 s.
Enclosure Rating: General purpose.
Housing Material: Aluminum.
W.E. ANDERSON
A DIVISION OF
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Phone: 219-879-8000
Fax: 219-872-9057
www.dwyer-inst.com
e-mail: [email protected]
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220 VAC
M
POWER
COOLING/HEATING COIL
RETURN
NORMAL
COOLING/HEATING COIL
POWER SUPPLY
T
NORMAL
END "B" INLET
SUPPLY
END "A" OUTLET
COOLING/HEATING COIL
Figure 1: Two-way valve
When install normal-closed 2-way valve, the ow direction is from end “B” to “A”,
for normal-open valve, it is from end “A” to “B”. In both situations, the valve closing
direction is opposite.
SUPPLY
TWO WIRE
THERMOSTAT
RETURN
When installing a diverting 3-way valve, end “B” is the supply to the coil, end “A” is
the by-pass. There is no mark for an inlet. End “A” and “B” are marked on the bottom
of the valve.
When the valve has an auxiliary micro switch, the wiring diagram is as follows:
CONTROLLER
AUX. SWITCH
BLACK
BLACK
ORANGE
ORANGE
END "B"
- CLOSED
END "B"
- CLOSED
M
INLET
Figure 2: Three-way valve
M
INLET
END "A" BYPASS
NORMAL - OPENED
BYPASS
POWER SUPPLY
TWO WIRE
SUPPLY
RETURN
THERMOSTAT
THREE WIRE
THERMOSTA
END "A" BYPASS
NORMAL - OPENED
SUPPLY
MAINTENANCE
Upon nal installation of the Series 3ZV1 Three-Way Zone Valves, no routine
maintenance is required. A periodic check of the system calibration is recommended.
The Series 3ZV1 is not eld serviceable and should be returned if repair is needed
(eld repair should not be attempted and may void warranty). Be sure to include a
brief description of the problem plus any relevant application notes. Contact customer
service to receive a return good authorization number before shipping.
Figure 3: Three-way valve with box change-over switch
85°
85°
Figure 4
W.E. ANDERSON
A DIVISION OF
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Printed in U.S.A. 6/20 FR# 443459-10 Rev. 3©Copyright 2020 Dwyer Instruments, Inc.
Phone: 219-879-8000
Fax: 219-872-9057
www.dwyer-inst.com
e-mail: [email protected]
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