Johnson Controls Tyco AMD-2 Manuel utilisateur

Model AMD-2 Automatic Air Maintenance Device

Compressor Control Type with

Field-Adjutable Pressure Switch

Page 1 of 4 AUGUST 2018 TFP1231

Worldwide

Contacts

www.tyco-ﬁre.com

IMPORTANT

Refer to Technical Data Sheet

TFP2300 for warnings pertaining to

regulatory and health information.

General

Description

The TYCO Model AMD-2 Automatic Air

Maintenance Device is an automatic,

ﬁeld-adjustable device that controls

the on-off cycling of an air compres-

sor. It is used to control the pressure in

a dry pipe sprinkler system, preaction

system, or dry pilot line of a dry pilot

actuated deluge or preaction valve.

The Model AMD-2 Device is utilized

in applications requiring the use of a

small, non-tank mounted compressor

dedicated to system pressurization.

The Model AMD-2 Device monitors

system pressure and automatically

cycles the air compressor on and off

to maintain system pressure within

preset limits.

The Model AMD-2 Device features a

Pressure Switch with integral unload-

ing valve that automatically bleeds the

pressure between the air compressor

and the Model AMD-2 Device after the

air compressor automatically shuts off.

This feature prevents start-up of the air

compressor under load.

The Model AMD-2 Device is a re-desig-

nation for the Central Model DU-2, Gem

Model F326, and Star Model S465.

NOTICE

The Model AMD-2 Automatic Air Main-

tenance Devices described herein must

be installed and maintained in compli-

ance with this document and with the

applicable standards of the NATIONAL

FIRE PROTECTION ASSOCIATION, in

addition to the standards of any author-

ities having jurisdiction. Failure to do so

may impair the performance of these

devices.

Owners are responsible for maintain-

ing their ﬁre protection system and

devices in proper operating condition.

The installing contractor or sprinkler

manufacturer should be contacted with

any questions.

Technical

Data

Approvals

UL and C-UL Listed

FM Approved

NYC Approved under MEA 206-02-E

NEMA Rating

The housing of the Pressure Switch meets

NEMA 1 requirements.

Field-Adjustable Pressures

Minimum Cut-In (On) 14 psi (1,0 bar)

Maximum Cut-Out (Off) 60 psi (4,1 bar)

Pressure Switch Differential

6 psi (0,4 bar)

The switch ratings are as follows:

115 VAC, 1 Phase . . . . . . . . . . . . . . . . . . . . 2 HP

230 VAC, 1 Phase . . . . . . . . . . . . . . . . . . . . 3 HP

230 VAC, 3 Phase . . . . . . . . . . . . . . . . . . . . 5 HP

575 VAC, 3 Phase . . . . . . . . . . . . . . . . . . . . 5 HP

115 VDC. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 HP

230 VDC . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 HP

Factory-Set Outlet Pressure

35 to 41 psi (2,4 to 2,8 bar)

Assembly

Major components illustrated in Figure

1 are factory-assembled, galvanized

steel nipples and malleable iron pipe

ﬁttings.

Operation

The By-Pass Valve in the Model AMD-2

Automatic Air Maintenance Device

is opened to quickly ﬁll the system

during initial pressurization. After

the cut-out pressure of the Pressure

Switch is reached, its actuating lever

transfers the DPDT switch contacts to

shut off the air compressor and open

the unloader valve to bleed pressure

between the air compressor and the

Restrictor Check Valve. The By-Pass

Valve is then closed to place the Model

AMD-2 Device in automatic operation.

The Restrictor Check Valve prevents

the unloader valve from bleeding down

the system. With the By-Pass Valve

closed, its 3/32 in. (2,4 mm) oriﬁce

limits air ﬂow into the system to a value

signiﬁcantly less than that exhausted

by the operation of a 5.6 K-factor

sprinkler.

When there is a small leak in the

system, the Pressure Switch automati-

cally transfers its contacts at the cut-in

pressure to start the air compressor

and shuts off the air compressor after

the cut-out pressure is reached.

TFP1231

Page 2 of 4

Installation

The TYCO Model AMD-2 Automatic

Air Maintenance Device should be

installed in the horizontal position as

shown in Figure 1, as well as in accor-

dance with the following instructions.

NOTICE

Moisture build-up can adversely affect

performance. Suitable consideration

must be given to the removal of exces-

sive moisture from the compressed air

supply.

1. Make connections a minimum of

1/2 in. (DN15) pipe size between

the air compressor and the Model

AMD-2 Device, as well as between

the Model AMD-2 Device and the

system to pressurize.

2. If a moisture lter with integral

drain is not installed at the outlet

of the air compressor, install a Drip

Leg in the air line between the Air

Compressor and the Model AMD-

2 Device as shown in Figure 2.

3. Place a 1/2 in. (DN15), non-spring

loaded, rubber-faced, swing-type

check valve between the Model

AMD-2 Device and the system to

pressurize. A check valve of this

type is provided in the air supply

trim of TYCO dry pipe valves, pre-

action valves, and dry pilot trim.

4. Make conduit and electrical con-

nections to the Pressure Switch in

accordance with the requirements

of the authority having jurisdic-

tion and/or the National Electrical

Code. Refer to Figure 3 for identi-

cation of the wiring terminals.

The Pressure Switch is wired

through two, 1/2 in. Conduit

Openings in the base of its enclo-

sure. The No. 8 screw terminals

accept up to No. 12 AWG wire.

Setting

Procedure

The TYCO Model AMD-2 Automatic

Air Maintenance Device must be

set in accordance with the following

instructions.

1. Open the By-Pass Valve in the

Model AMD-2 Device.

2. Open the control valve in the

air supply trim to the system to

pressurize.

3. To pressurize the system, apply

electrical power to the Pressure

Switch.

4. Close the By-Pass Valve after the

Pressure Switch cuts out. Note the

cut-out pressure.

5. Open a connection to the system

slowly enough to reduce the air

pressure and close it immediately

after the Pressure Switch cuts in.

Verify that the cut-in pressure

meets the minimum requirements

of the system to pressurize, and

note the cut-out pressure.

If necessary, remove the cover

from the Pressure Switch and ad-

just the cut-in pressure adjustment

screw shown in Figure 3. The cut-

in pressure changes approximately

1.5 psi (0,1 bar) per half-turn of the

screw.

The cut-in pressure should be set

at the minimum required value, in

order to minimize the time to sys-

tem trip in the event of a sprinkler

operation.

6. Repeat Step 5 if the cut-in pres-

sure required adjustment. Note

both the cut-in and cut-out pres-

sures for future reference.

1/2" NPT OUTLET

CONNECTION

PRESSURE SWITCH

(WITH UNLOADER VALVE)

P/N 92-326-1-001

(TO SYSTEM)

(177,5 mm)

12-1/2"

(317,5 mm)

2-1/2"

(63,5 mm)

16-1/2"

(419,1 mm)

(101,6 mm)

RESTRICTOR

CHECK VALVE STRAINER

BY-PASS VALVE

(NORMALLY CLOSED)

P/N 46-047-1-004

1/2" NPT INLET

CONNECTION

(FROM AIR

COMPRESSOR)

1/2" CONDUIT

OPENINGS

P/N 92-326-1-003 P/N 52-353-1-002

FIGURE 1

MODEL AMD-2

AUTOMATIC AIR MAINTENANCE DEVICE

TFP1231

Page 3 of 4

Care and

Maintenance

The TYCO Model AMD-2 Automatic

Air Maintenance Device must be main-

tained and serviced in accordance with

the following instructions, in addition to

any speciﬁc requirements of the NFPA.

Any impairment must be immediately

corrected.

NOTICE

Before closing a ﬁre protection system

main control valve for maintenance

work on the fire protection system

that it controls, obtain permission to

shut down the affected ﬁre protec-

tion system from the proper authori-

ties and notify all personnel who may

be affected by this action.

Do not allow condensed moisture

to back-up into the air compressor

cylinder.

It is recommended that accumulated

moisture be removed from air supply

moisture ﬁltration equipment at least

quarterly. More frequent inspections

may be necessary in particularly humid

environments.

After placing a ﬁre protection system

in service, notify the proper authori-

ties and advise those responsible for

monitoring proprietary and/or central

station alarms.

Responsibility lies with owners for the

inspection, testing, and maintenance of

their ﬁre protection system and devices

in compliance with this document, as

well as with the applicable standards

of the NATIONAL FIRE PROTECTION

ASSOCIATION (for example, NFPA 25),

in addition to the standards of any other

authorities having jurisdiction. Contact

the installing contractor or sprinkler

manufacturer regarding any questions.

Automatic sprinkler systems are rec-

ommended to be inspected, tested,

and maintained by a qualiﬁed Inspec-

tion Service in accordance with local

requirements and/or national code.

The Model AMD-2 Automatic Air Main-

tenance Device must be inspected

quarterly in accordance with the fol-

lowing instructions.

7. Verify that the Model AMD-2 By-

Pass Valve is closed.

8. Clean out the 1/4 in. Model AMD-2

Strainer located at the inlet to the

Restrictor Check Valve. Be sure to

re-install the strainer screen and

tighten the cap securely.

9. Close the system’s main control

valve and open the main drain

valve. Close the accelerator con-

trol valve, if the system is so

equipped.

10. Open a connection to the sys-

tem slowly enough to reduce

the air pressure and close it

immediately after the Pres-

sure Switch cuts in. Verify

that the cut-in and cut-out pres-

sures are essentially the same

as the previously established

requirements.

11. Open the accelerator control valve,

as applicable.

12. Slowly open the main control valve

and after water begins to ow,

slowly close the main drain valve.

Completely open the main control

valve. The Model AMD-2 Device is

now ready for service.

Limited

Warranty

For warranty terms and conditions, visit

www.tyco-ﬁre.com.

Ordering

Procedure

Contact your local distributor for avail-

ability. When placing an order, indi-

cate the full product name, including

description and Part Number (P/N).

Model AMD-2 Device

Specify: Model AMD-2 Automatic Air

Maintenance Device, P/N 52-326-2-001

Replacement Parts

Specify: (description) for use with the

Model AMD-2 Automatic Air Mainte-

nance Device, P/N (from Figure 1)

AIR COMPRESSOR

MODEL AMD-2

AIR MAINTENANCE

DEVICE

SYSTEM

6" DRIP LEG

INCREASE PRESSURE

LINE MOTOR LINE

CUT-IN (ON) PRESSURE

ADJUSTMENT SCREW

FIGURE 2

INSTALLATION OF DRIP LEG BETWEEN

AIR COMPRESSOR AND MODEL AMD-2 DEVICE

FIGURE 3

ADJUSTMENT SCREW

AND WIRING TERMINALS

(COVER REMOVED)

TFP1231

Page 4 of 4

NATIONAL FIRE PROTECTION ASSOCIATION and NFPA are registered trademarks of National Fire Protection Association

1400 Pennbrook Parkway, Lansdale, PA 19446 | Telephone +1-215-362-0700

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