Dwyer Instruments WPTN-A-C-02, WPTN-A-C-01-10, WPTN-A-C-04-100, WPTN-A-C-05-10, WPTN-A-C-04-10 User manual

Series WPTN Multi-Jet NSF Certied Plastic Water Meter

W

L

Specications - Installation and Operating Instructions

Bulletin F-WPTN

H

Spud Size
(BSPP)

5/8˝
5/8˝
3/4˝
1˝
1-1/2˝

The Series WPTN Multi-Jet NSF Certied Plastic Water Meter is a series of plastic
mechanical water totalizing meters with NSF certication. The meters display the total
water usage in gallons. They are available in a range of body sizes and include NPT
optional couplings. The plastic body water meters can be used where standard brass
is not compatible, in potable water applications, some corrosive environments, or
where an economical water totalizer is desired.

Unit must be installed in a horizontal position with the meter face

CAUTION

Installation Instructions

1. Thoroughly ush the service line upstream of the meter to remove dirt and debris.

2. Remove meter spud thread protectors.

NOTICE

3. Set the meter in the line. Install in a horizontal plane with the meter face upright in
a location accessible for reading, service and inspection. There are arrows located
on the side of the meter and above the outlet spud which indicate the direction of
ow. See Figure 1 for correct alignment.

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.

pointing up otherwise leakage and/or meter damage will occur.

To protect meter spud threads, store the meter with thread

protectors in place.

Coupling
Size (NPT) L W H Weight

1/2˝
3/4˝
1˝
1˝
1-1/2˝

6-1/2˝ [165 mm]
7-1/2˝ [190 mm]
10-1/4˝ [260 mm]
10-1/4˝ [260 mm]
11-13/16˝ [300 mm]

SPECIFICATIONS
Service: Water.
Wetted Materials: Body: PA; Couplings: PA; Measuring chamber: ABS plastic.
Flow Range: See model chart.
Accuracy: WPTN-A-X-XX: Minimum ow: ±3%; Nominal ow: ±1.5%.
Temperature Limit: 112°F (50°C).
Pressure Limit: 150 psi (10 bar).
Pressure Drop: See pressure drop curve.
Totalizing Display Maximum: See model chart.
Output Signal: Pulse output with frequency proportional to ow rate.
Pulse Options: 0.1 gal, 1 gal, 10 gal, 100 gal per pulse (1 L, 10 L, 100 L, 1000 per

pulse*) See model chart.

Electrical Rating: 0.01 A @ 24 VAC/DC.
Electrical Connections: 3.5mm
Mounting Orientation: Horizontal with meter face facing up.
Weight: See dimension chart.
Approvals: NSF/ANSI 61.

*Consult factory.

3-23/32˝ [94 mm]
3-23/32˝ [94 mm]
3-55/64˝ [98 mm]
3-55/64˝ {98 mm]
4-13/16˝ [122 mm]

2

stranded lead wires, 4.5´ (1.5 m) long.

4-15/64˝ [107.5 mm]
4-15/64˝ [107.5 mm]
4-5/8˝ [117.5 mm]
4-5/8˝ [117.5 mm]
5-45/64˝ [141.5 mm]

1.55 lb [0.7 kg]

1.77 lb [0.8 kg]

2.43 lb [1.1 kg]

2.43 lb [1.1 kg]

4.41 lb [2 kg]

With upstream shutoff valve only:

6. Open shutoff valve slowly to remove air from meter and service line. Open a faucet
slowly to allow entrapped air to escape. Close the faucet.

MODEL CHART

Model Size
WPTN-A-C-01

WPTN-A-C-02
WPTN-A-C-03
WPTN-A-C-04
WPTN-A-C-01-1
WPTN-A-C-02-1
WPTN-A-C-03-1
WPTN-A-C-04-1
WPTN-A-C-05-1
WPTN-A-C-01-10
WPTN-A-C-02-10
WPTN-A-C-03-10
WPTN-A-C-04-10
WPTN-A-C-05-10
WPTN-A-C-01-100
WPTN-A-C-02-100
WPTN-A-C-03-100
WPTN-A-C-04-100
WPTN-A-C-05-100

5/8˝ x 1/2˝
5/8˝ x 3/4˝
3/4˝ x 1˝
1˝
5/8˝ x 1/2˝
5/8˝ x 3/4˝
3/4˝ x 1˝
1˝
1-1/2˝
5/8˝ x 1/2˝
5/8˝ x 3/4˝
3/4˝ x 1˝
1˝
1-1/2˝
5/8˝ x 1/2˝
5/8˝ x 3/4˝
3/4˝ x 1˝
1˝
1-1/2˝

Coupling
Size

5/8˝ x 1/2˝
5/8˝ x 3/4˝
3/4˝ x 1˝
1˝
5/8˝ x 1/2˝
5/8˝ x 3/4˝
3/4˝ x 1˝
1˝
1-1/2˝
5/8˝ x 1/2˝
5/8˝ x 3/4˝
3/4˝ x 1˝
1˝
1-1/2˝
5/8˝ x 1/2˝
5/8˝ x 3/4˝
3/4˝ x 1˝
1˝
1-1/2˝

GPM (Gallons Per Minute)
Maximum

Flow

20
20
30
50
20
20
30
50
100
20
20
30
50
100
20
20
30
50
100

Nominal
Flow Range

1 to 20
1 to 20
2 to 30
3 to 50
1 to 20
1 to 20
2 to 30
3 to 50
5 to 100
1 to 20
1 to 20
2 to 30
3 to 50
5 to 100
1 to 20
1 to 20
2 to 30
3 to 50
5 to 100

Minimum
Flow

0.25

0.25

0.5

0.75

0.25

0.25

0.5

0.75

1.5

0.25

0.25

0.5

0.75

1.5

0.25

0.25

0.5

0.75

1.5

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
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
9,999,999.99
9,999,999.99
9,999,999.99

Pulse Rate
(Gal/Pusle)

0.1

0.1

0.1

0.1
1
1
1
1
1
10
10
10
10
10
100
100
100
100
100

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With both upstream and downstream shutoff valves installed:

7. Test the installation for leaks: Close the outlet (downstream) shutoff valve.
Open the inlet (upstream) shutoff 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.

Pressure Loss Curve

18 [120]
16 [100]

12 [80]

9 [60]
6 [40]
3 [20]

PRESSURE LOSS PSI [KPA]

20 [76] 40 [152] 60 [227] 80 [303] 100 [379] 120 [455]

FLOW GPM [LPM]

5/8 X 1/2˝
5/8 X 3/4˝
3/4 X 1˝
1˝
1-1/2˝

INCORRECT

Electrical Installation

The Series WPTN uses a dry contact closure reed switch and does not require power.
It can be wired using Figure 2.

Meter Reading

The total ow that has passed through the meter is read by starting at the top of the
register with the Five-Digit Totalizer, and then read clockwise around the small dials. In
Figure 3 below, the Five-Digit Totalizer reads 13800 (138 x 100), and the dials read 0
(0 x 10), 0 (0 x1), and 0 (0 x 0.1) respectively. The total ow is 13800.0.

CORRECT

Figure 1

Figure 2

INCORRECT

RED LINE

BLACK LINE

138

Accuracy Chart

%

+

3
2

1
0

0

-1

ERROR(%)

MAINTENANCE/REPAIR

Upon nal installation of the Series WPTN, no routine maintenance is required. The
Series WPTN is not eld serviceable and is not possible to repair the unit. Field repair
should not be attempted and may void warranty.

WARRANTY/RETURN

Refer to “Terms and Conditions of Sale” in our catalog and on our website. Contact
customer service to receive a Return Authorization number before shipping the
product back for repair. Be sure to include a brief description of the problem plus any

additional application notes.

-2

-3

-

LOW NORMALHIGH

ERROR CURVE

5/8 x 1/2˝
5/8 x 3/4˝
3/4 x 1˝
1˝
1-1/2˝

FLOW RATE LIMITS

Figure 3

138

Figure 4

Printed in U.S.A. 12/20 FR# 444262-10 Rev. 1©Copyright 2020 Dwyer Instruments, Inc.

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