Dwyer WMT2 User Manual
Bulletin F-WMT2
WMT2-X-C-XX-X
XX-XX
H
L
W
Series WMT2 Multi-Jet Water Meters with Pulsed Output
Specifications - Installation and Operating Instructions
The Series WMT2 Multi-Jet Water Meter is ideal for commercial and industrial
pplications. The multi-jet design allows simplicity and accuracy with wide flow
a
anges, even in low flow applications. The magnetically driven, hermetically sealed
r
register will not leak or fog and is completely separated from the water. These
water meters are designed for long service life and maintenance-free operation.
Installation Instructions
1. Thoroughly flush the service line upstream of the meter to remove dirt and
debris.
2. Remove meter spud thread protectors.
Note: To protect meter spud threads, store the meter with thread protectors in
place.
3.Set the meter in the line. Install in a horizontal plane, with the register upright, in
a location accessible for reading, service and inspection. Arrows on the side of the
meter and above the outlet spud indicate the direction of flow.
4. For accurate measurement, the tap height should be higher than the meter.
5. Do not over-tighten connections; tighten only as required to seal. Do not use
pipe sealant tape on meter threads.
6. With upstream shut-off valve only: Open shut-off valve slowly to remove air from
meter and service line. Open a faucet slowly to allow entrapped air to escape.
Close the faucet.
With both upstream and downstream shut-off valves installed:
7. Test the installation for leaks: Close the outlet (downstream) shutoff valve. Open
the inlet (upstream) shut-off slowly until meter is full of water. Open the outlet
(downstream) valve slowly until air is out of the meter and service line. Open a
faucet slowly to allow entrapped air to escape. Close the faucet.
Size
in (mm)
/8 (15)
5
/8 x 3/4
5
/4 (20)
3
1 (25)
1-1/4 (32)
1-1/2 (40)
2 (50)
Spud NPSM
(BSPP)
/4˝ (3/4˝)
3
˝ (1˝)
1
˝ (1˝)
1
1-1/4˝ (1-1/4˝)
1-1/2˝ (1-1/2˝)
2˝ (2˝)
2-1/2˝ (2-1/2˝)
SPECIFICATION
Service: Water.
Wetted Materials:
Body: Brass, polyethylene;
Couplings: Brass;
Measuring Chamber: Polyethylene, ABS plastic, ferrite, acetal.
Flow Range: See model chart.
Accuracy: Transitional Flow: ±5%; Nominal Flow: ±2%.
Temperature Limit: 104°F (40°C).
Pressure Limit: 232 psi (16 bar).
Pressure Drop: See pressure drop chart.
Totalizing Display Maximum: See model chart.
Output Signal: Pulse output with frequency proportional to flow rate.
Pulse Options: 0.1 gal, 1 gal, 10 gal, 100 gal per pulse (1 L, 10 L, 100 L per
pulse).
Electrical Rating: 0.01 A @ 24 VAC/DC.
Electrical Connections: Color-coded lead wires, 4.5´ (1.5 m) long.
Mounting Orientation: Horizontal.
Weight: See dimension chart.
Length ‘L’
in (mm)
-1/2 (165)
6
-1/2 (190)
7
-1/2 (190)
7
10-1/4 (260)
10-1/4 (260)
11-13/16 (300)
11-13/16 (300)
Width ‘W’
in (mm)
-45/64 (94)
3
-45/64 (94)
3
-45/64 (94)
3
3-55/64 (98)
3-55/64 (98)
4-51/64 (122)
5-45/64 (145)
Height ‘H’
in (mm)
-15/64 (107.5)
4
-15/64 (107.5)
4
-15/64 (107.5)
4
4-5/8 (117.5)
4-5/8 (117.5)
5-9/16 (141.5)
6-31/32 (177)
Weight
lb (kg)
.75 (1.7)
3
.97 (1.8)
3
.9 (2.2)
4
6.4 (2.9)
8.2 (3.7)
13.52 (6.17)
18.74 (8.5)
Model
WMT2-A-C-01
WMT2-A-C-02
WMT2-A-C-03
WMT2-A-C-04
WMT2-A-C-01-1
WMT2-A-C-02-1
WMT2-A-C-03-1
WMT2-A-C-04-1
WMT2-A-C-06-10
WMT2-A-C-07-10
WMT2-A-C-04-100
WMT2-A-C-07-100
Coupling
Size
1/2˝ NPT
3/4˝ NPT
3/4˝ NPT
1˝ NPT
1/2˝ NPT
3/4˝ NPT
3/4˝ NPT
1˝ NPT
1-1/2˝ NPT
2˝ NPT
1˝ NPT
2˝ NPT
Size
5/8 x 1/2˝
5/8˝ x 3/4˝
3/4˝
1˝
5/8 x 1/2˝
5/8˝ x 3/4˝
3/4˝
1˝
1-1/2˝
2˝
1˝
2˝
Max Flow
20
20
30
50
20
20
30
50
100
160
50
160
DWYER INSTRUMENTS, INC.
Nominal Flow Range
GPM (Gallons Per Minute)
1 to 10
1 to 20
2 to 30
3 to 50
1 to 10
1 to 20
2 to 30
3 to 50
5 to 100
80 to 160
3 to 50
80 to 160
Transitional Flow
0.25
0.25
0.25
0.75
0.25
0.25
0.25
0.75
1.5
2
0.75
2
Phone: 219/879-8000 www.dwyer-inst.com
Display Max
(Gallons)
9,999,999.99
9,999,999.99
9,999,999.99
9,999,999.99
9,999,999.99
9,999,999.99
9,999,999.99
9,999,999.99
99,999,999.9
99,999,999.9
9,999,999.99
99,999,999.9
Pulse Rate
(Gal./Pulse)
0.1
0.1
0.1
0.1
1
1
1
1
10
10
100
100
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: info@dwyer-inst.com
oupling
M
MT2-B-C-08-1
W
MT2-B-C-10-1
W
WMT2-B-C-11-1
WMT2-B-C-12-1
WMT2-B-C-08-10
MT2-B-C-12-10
W
MT2-B-C-14-10
W
MT2-B-C-12-100
W
MT2-B-C-14-100
W
eter Reading
M
he total flow that has passed through your meter is read by starting at the top of the
T
egister with the Five-Digit Totalizer, and then read clockwise around the small dials.
r
n the example below, the Five-Digit Totalizer reads 13800 (138 x 100), and the dials
I
ize
S
/2˝ BSPT
1
/4˝ BSPT
3
1˝ BSPT
1-1/4˝ BSPT
1/2˝ BSPT
-1/4˝ BSPT
1
˝ BSPT
2
-1/4˝ BSPT
1
˝ BSPT
2
odel
C
Size
5 mm
1
0 mm
2
5 mm
2
2 mm
3
15 mm
32 mm
50 mm
2 mm
3
0 mm
5
Max Flow
3
5
7
2
1
3
12
30
2
1
0
3
ominal Flow Range
N
m3/h
.12 to 1.5
0
.2 to 2.5
0
0.25 to 3.5
0.48 to 6
0.12 to 1.5
.48 to 6
0
.2 to 1.5
1
.48 to 6
0
.2 to 15
1
Transitional Flow
.03
0
.05
0
.07
0
0.12
0.03
0.12
.3
0
.12
0
.3
0
read 60 (6 x10), 2 (2 x1), and 0.4 (4 x 0.1) respectively. The total flow is 13862.4.
Display Max
3
m
(
)
9,999.9999
9
9,999.9999
9
9,999.9999
9
99,999.9999
99,999.9999
99,999.9999
99,999.9999
9
9,999.9999
9
99,999.9999
9
)
5
DN1
D
(
(
)
0
2
N
ulse Rate
P
(L/Pulse)
1
1
1
1
0
1
0
1
10
100
100
)
5
2
N
D
(
)
2
3
N
(D
)
0
4
N
D
(
)
0
5
N
D
(
INSTALLATION
ELECTRICAL INSTALLATION
Dry contact closure, does not require power.
Pressure Drop
Accuracy Chart
MAINTENANCE/REPAIR
Preventative maintenance consists of periodic inspections and cleaning procedures.
The procedures should be performed at regular intervals, and any defects discovered
should be corrected before further operation of the meter.
Visually inspect the meter for missing hardware, broken resistor glass, or other signs
of wear or deterioration. Verify proper flow rate and pressure for meter. A loss in
pressure, with the resulting flow rate decrease, may indicate the meter screen is
clogged and requires cleaning.
Clean the strainer yearly, or as required, depending on water condition. Pull out the
strainer or back flush the meter to loosen trapped particulates.
The Series WMT2 is not field serviceable and should be returned if repair is needed.
Field repair should not be attempted and may void warranty.
WARRANTY/RETURN
Refer to “Terms and Conditions of Sales” in our catalog and on our website. Contact
customer service to receive a Return Goods Authorization number before shipping the
product back for repair. Be sure to include a brief description of the problem plus any
additional application notes.
©Copyright 2013 Dwyer Instruments, Inc. Printed in U.S.A. 4/13 FR# R2-444046-00 Rev. 2
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: info@dwyer-inst.com
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