Omega WMH, WMH-A-C-01, WMH-A-C-02, WMH-A-C-03, WMH-A-C-04 User guide

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Series WMH Multi-Jet Hot Water Meter

Specications - Installation and Operating Instructions

Bulletin F-WMH

Size in (mm)

5/8 x 1/2 (15) 5/8 x 3/4 3/4 (20) 1 (25) 1-1/4 (32) 1-1/2 (40) 2 (50)

The SERIES WMH High Temperature Multi-Jet Water Meters are a series of mechanical, water totalizing meters that display the total water usage in Gallons with

options. They are available in a range of body sizes and include NPT or BSPT

m optional couplings. The high temperature resistant brass body is compatible in applications with high temperature water no suitable with standard brass water meters and maintains its accuracy.

FEATURES/BENEFITS

• High temperature threshold of 190ºF (88ºC) ideal for high temperature applications

• Multi-jetdesignallowsforsimplicityandaccuracywithwideowranges,eveninlow  owapplications

• Magnetically driven, hermetically sealed register does not leak or fog and is completely separated from the water

• Designed for long service life and maintenance-free operation

• Integral strainer that protects meter from particulate damage

• Easy installation with included coupling adapters

• Pulsedoutputproportionaltoowallowsforremoteowtotalization

APPLICATIONS

• HVAC applications

• Measuringtotalcondenserwaterowinresidential,commercialandindustrial 

applications

• Remote hot water monitoring

Spud NPSM (BSPP)

3/4(3/4˝) 1(1˝) 1(1˝) 1-1/4(1-1/4˝) 1-1/2(1-1/2˝) 2(2˝) 2-1/2(2-1/2˝)

SPECIFICATIONS Service: Water. Wetted Materials: Body: Brass; Couplings: Brass; Measuring Chamber: Brass. Flow Range: See model chart. Accuracy: WMH-A-X-XX: Transitional Flow: ±3%; Nominal Flow: ±1.5%; WMH-

B-X-XX*: Transitional Flow: ±5%; Nominal Flow: ±2%. Temperature Limit: 190°F (88°C).

Pressure Limit: 150 psi (10 bar). Pressure Drop: See pressure drop curve below. 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: 0.01A @ 24VAC/DC. Electrical Connections: Color-coded lead wires, 4.5 (1.5m) long; Mounting Orientation: Horizontal. Weight: See dimension chart.

CAUTION

Pressure Drop

Length ‘L’ in (mm)

6-1/2(165) 7-1/2(190) 7-1/2(190) 10-1/4(260) 10-1/4 (260) 11-13/16 (300) 11-13/16 (300)

Unit must be installed in a horizontal position with the register face pointing up otherwise leakage and/or meter damage will occur.

Width ‘W’ in (mm)

3-45/64 (94) 3-45/64(94) 3-45/64(94) 3-55/64(98) 3-55/64(98) 4-51/64(122) 5-45/64(145)

Height ‘H’ in (mm)

4-15/64(107.5) 4-15/64(107.5) 4-15/64(107.5) 4-5/8(117.5) 4-5/8(117.5) 5-9/16(141.5) 6-31/32(177)

Weight lb (kg)

3.75(1.7)

3.97(1.8)

4.9(2.2)

6.4(2.9)

8.2(3.7)

13.52 (6.17)

18.74 (8.5)

Installation Instructions

1. Thoroughlyush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ow.

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.

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.

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.

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]

Page 2

MODEL CHART

Model Size WMH-A-C-01 WMH-A-C-02 WMH-A-C-03 WMH-A-C-04 WMH-A-C-05 WMH-A-C-06 WMH-A-C-01-1 WMH-A-C-02-1 WMH-A-C-03-1 WMH-A-C-04-1 WMH-A-C-05-1 WMH-A-C-06-1 WMH-A-C-07-1 WMH-A-C-08-1 WMH-A-C-01-10 WMH-A-C-02-10 WMH-A-C-03-10 WMH-A-C-04-10 WMH-A-C-05-10 WMH-A-C-06-10 WMH-A-C-07-10 WMH-A-C-08-10 WMH-A-C-01-100 WMH-A-C-02-100 WMH-A-C-03-100 WMH-A-C-04-100 WMH-A-C-05-100 WMH-A-C-06-100 WMH-A-C-07-100 WMH-A-C-08-100

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

Coupling Size

1/2˝NPT 3/4˝NPT 3/4˝NPT 3/4˝NPT 1˝NPT 1˝NPT 1/2˝NPT 3/4˝NPT 3/4˝NPT 3/4˝NPT 1˝NPT 1˝NPT 1-1/2˝NPT 2˝NPT 1/2˝NPT 3/4˝NPT 3/4˝NPT 3/4˝NPT 1˝NPT 1˝NPT 1-1/2˝NPT 2˝NPT 1/2˝NPT 3/4˝NPT 3/4˝NPT 3/4˝NPT 1˝NPT 1˝NPT 1-1/2˝NPT 2˝NPT

GPM (Gallons Per Minute) Max Flow

20 20 30 30 30 50 20 20 30 30 30 50 100 160 20 20 30 30 30 50 100 160 20 20 30 30 30 50 100 160

Nominal Flow Range

1 to 20 1 to 20 2 to 30 2 to 30 2 to 30 3 to 50 1 to 20 1 to 20 2 to 30 2 to 30 2 to 30 3 to 50 5 to 100 8 to 160 1 to 20 1 to 20 2 to 30 2 to 30 2 to 30 3 to 50 5 to 100 8 to 160 1 to 20 1 to 20 2 to 30 2 to 30 2 to 30 3 to 50 5 to 100 8 to 160

Transitional Flow

0.25

0.5

0.75

0.25

0.5

0.75

1.5 2

0.25

0.5

0.75

1.5 2

0.25

0.5

0.75

1.5 2

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 9,999,999.9 9,999,999.9 9,999,999.99 9,999,999.99 9,999,999.99 9,999,999.99 9,999,999.99 9,999,999.99 9,999,999.9 9,999,999.9 9,999,999.99 9,999,999.99 9,999,999.99 9,999,999.99 9,999,999.99 9,999,999.99 9,999,999.9 9,999,999.9

Pulse Rate (Gal/Pulse)

0.1

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

Net Weight with Connectors lb (kg)

3.58 (1.63)

3.82 (1.73)

4.21 (1.91)

4.5 (2.04)

6.02 (2.73)

3.58 (1.63)

3.82 (1.73)

4.21 (1.91)

4.5 (2.04)

6.02 (2.73)

12.02 (5.45)

13.23 (6.00)

3.58 (1.63)

3.82 (1.73)

4.21 (1.91)

4.5 (2.04)

6.02 (2.73)

12.02 (5.45)

13.23 (6.00)

3.58 (1.63)

3.82 (1.73)

4.21 (1.91)

4.5 (2.04)

6.02 (2.73)

12.02 (5.45)

13.23 (6.00)

MODEL CHART

Model WMH-B-C-09-1 WMH-B-C-10-1 WMH-B-C-11-1 WMH-B-C-12-1 WMH-B-C-09-10 WMH-B-C-10-10 WMH-B-C-11-10 WMH-B-C-12-10 WMH-B-C-13-10 WMH-B-C-14-10 WMH-B-C-09-100 WMH-B-C-10-100 WMH-B-C-11-100 WMH-B-C-12-100 WMH-B-C-13-100 WMH-B-C-14-100 WMH-B-C-09-1000 WMH-B-C-10-1000 WMH-B-C-11-1000 WMH-B-C-12-1000 WMH-B-C-13-1000 WMH-B-C-14-1000

Size (mm) Coupling Size

1/2” BSPT

3/4” BSPT

1” BSPT

1-1/4” BSPT

1/2” BSPT

3/4” BSPT

1” BSPT

1-1/4” BSPT

1-1/2”BSPT

2” BSPT

1/2” BSPT

3/4” BSPT

1” BSPT

1-1/4” BSPT

1-1/2”BSPT

2” BSPT

1/2” BSPT

3/4” BSPT

1” BSPT

1-1/4” BSPT

1-1/2”BSPT

2” BSPT

Max Flow

3 5 7 12 3 5 7 12 20 30 3 5 7 12 20 30 3 5 7 12 20 30

Nominal Flow Range

0.12 to 1.5

0.2 to 2.5

0.25 to 3.5 .48 to 6

0.12 to 1.5

0.2 to 2.5

0.25 to 3.5 .48 to 6

0.8 to 10

1.2 to 15

0.12 to 1.5

0.2 to 2.5

0.25 to 3.5 .48 to 6

0.8 to 10

1.2 to 15

0.12 to 1.5

0.2 to 2.5

0.25 to 3.5 .48 to 6

0.8 to 10

1.2 to 15

Transitional Flow

0.03

0.05

0.07

0.12

0.03

0.05

0.07

0.12

0.2

0.3

0.03

0.05

0.07

0.12

0.2

0.3

0.03

0.05

0.07

0.12

0.2

0.3

Display Max

99,999.9999 99,999.9999 99,999.9999 99,999.9999 99,999.9999 99,999.9999 99,999.9999 99,999.9999 999,999.9999 99,999.9999 99,999.9999 99,999.9999 99,999.9999 99,999.9999 999,999.9999 99,999.9999 99,999.9999 99,999.9999 99,999.9999 99,999.9999 999,999.9999 99,999.9999

Pulse Rate (Liters/Pulse)

1 1 1 1 10 10 10 10 10 10 100 100 100 100 100 100 1000 1000 1000 1000 1000 1000

Net Weight with Connectors lb (kg)

3.53 (1.6)

3.82 (1.73)

4.21 (1.91)

4.5 (2.04)

3.53 (1.6)

3.82 (1.73)

4.21 (1.91)

4.5 (2.04)

12.02 (5.45)

13.23 (6.00)

3.52 (1.6)

3.82 (1.73)

4.21 (1.91)

4.5 (2.04)

12.02 (5.45)

13.23 (6.00)

3.527 (1.6)

3.82 (1.73)

4.21 (1.91)

4.5 (2.04)

12.02 (5.45)

13.23 (6.00)

Page 3

Meter Reading

Thetotalowthathaspassedthroughyour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 the example 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

Electrical Installation

Installation

Incorrect Correct Incorrect

Accuracy Chart

MAINTENANCE/REPAIR

Uponnal installationoftheSeries WMH,no routinemaintenance isrequired.The SeriesWMH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 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.

Page 4

NOTES

__________________________________________________________________________________________________________________________________________

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.

Phone: 219/879-8000

Fax: 219/872-9057

dwyer-inst.com

e-mail: [email protected]