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AIR MAINTENANCE DEVICE MODEL H-2 MODEL H-3 DESCRIPTION

AND

OPERATION

Globe's Model H-2 and H-3 Air Pressure Maintenance Devices are automatic, field-adjustable devices that control the on-off cycling of an air compressor. They are used to control the supervisory air pressure in a dry pipe sprinkler system, preaction system, or dry pilot line system of a dry pilot sprinkler actuated deluge or preaction valve. The H-2 and H-3 are utilized in applications where it is desirable or necessary to use a small, non-tank mounted compressor that is to be dedicated to the system to be pressurized. The H-2 and H-3 monitor system pressure and automatically cycle the air compressor on and off to maintain system pressure within the preset limits. The Model H-2 should be specified when the primary air compressor has an unloader as an integral part. After the initial system air pressure has been established, the 1/2" Globe valve is closed. As pressure on the system side of the 1/4" check valve drops, the air pressure switch contacts close, causing the compressor to start. A restricted orifice limits the rate at which air is replaced. When the system air pressure has been re-established, the switch contacts open, stopping the compressor. Globe's Model H-3 Air Maintenance Device is similar in operation to the Model H-2. The Model H3, however, incorporates an unloader valve. This model is selected when the primary air compressor is not equipped with an unloader device. After the compressor has re-established the required air pressure on the system side of the check valve, the air pressure switch contacts open, stopping the compressor and operating a release valve. The release valve vents the compressor head to exhaust the air trapped between the compressor head and the by-pass check valve. On the next automatic operating cycle, the compressor will start against atmospheric pressure, thus preventing excessive starting loads.

APPROVALS

UL Listed FM Approved NYC-DOB MEA 335-91-M

MODEL H-2 AIR MAINTENANCE DEVICE

MODEL H-3 AIR MAINTENANCE DEVICE

H-2, H-3 SPECIFICATIONS U.S. 14 PSI

Metric 0.98 kg/cm2

MAXIMUM OPEN PRESSURE

60 PSI

4.22kg/cm2

DIFFERENTIAL PRESSURE

6-16 PSI

42 - 1.12 kg/cm2

CUT IN

30 PSI

2.11 kg/cm2

CUT OUT (ADJUSTABLE)

40 PSI

2.81 kg/cm2

2 HP 3 HP 5 HP 3 HP 5 HP 2 HP 120V 240V 600V 120V 240 - 600V 115 - 230V single single single 3 3 DC phase phase phase phase phase NOTE: METRIC CONVERSIONS ARE APPROXIMATE.

TECHNICAL DATA

Physical Dimensions H-2 - 13 1/2" X 7" (343 mm X 178 mm) H-3 - 13 1/8" X 7 7/8" (334 mm X 200 mm)

4077 AIR PARK DRIVE, STANDISH, MICHIGAN 48658 JULY 2010

MINIMUM CLOSE PRESSURE

989-846-4583 G-2

FAX 989-846-9231

BULLETIN H2,3 REV# 1

AIR MAINTENANCE DEVICE MODEL H-2 MODEL H-3 ITEM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Model H-2 DESCRIPTION MAT'L Nameplate Aluminum 1/2 X 3 Nipple Steel 1/4 Needle Valve Brass 1/4 Union Steel 1/4 Close Nipple Steel 1/4 Black Elbow Steel 1/4 Strainer Brass Metering Orifice Brass 1/4 Check Valve Aluminum 1/4 X 1 1/2 Nipple Steel Pressure Sw itch Purchase 3/8 X Close Nipple Steel 1/2 X 1/2 X 3/8 Tee Steel 1/2 X 2 Nipple Steel 1/2 Globe Valve Brass 1/2 X 1/2 X 1/4 Tee Steel

P/N 320596 310304 320586 311401 310100 311201 320587 320588 320589 310101 320597 55122 311309 310302 311601 311314

ITEM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

Model H-3 DESCRIPTION MAT'L Nameplate Aluminum 1/2 Globe Valve Brass 1/2 Close Nipple Steel 1/2 X 1/2 X 1/4 Tee Steel 1/2 X 2 1/2 Nipple Steel 1/4 Needle Valve Brass 1/4 Union Steel 1/4 Close Nipple Steel 1/4 Black Elbow Steel 1/4 X 1 1/2 Nipple Steel 1/4 Strainer Brass Metering Orifice Brass 1/4 Check Valve Aluminum 1/2 X 1/2 X 3/8 Tee Steel 3/8 X Close Nipple Steel Pressure Switch Pressure Sw itch Purchase Connector Tubing - 19" Copper Tube Fitting Brass

P/N 320601 311601 310300 311314 310303 320586 311401 310100 311201 310101 320587 320588 320589 311309 55122 320602 320604 320603

MODEL H-2

MODEL H-3

ORDERING INFORMATION SPECIFY Quantity

GLOBE® PRODUCT WARRANTY Globe agrees to repair or replace any of its own manufactured products found to be defective in material or workmanship for a period of one year from date of shipment. For specific details of our warranty please refer to Price List Terms and Conditions of Sale (Our Price List).

Model Number

4077 AIRPARK DRIVE, STANDISH, MICHIGAN 48658 FAX 989-846-9231 989-846-4583 www.globesprinkler.com 1-800-248-0278 JULY 2010

PRINTED U.S.A.

BULLETIN H2,3 REV# 1

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