Johnson Controls Tyco AMD-1 User manual

Model AMD-1 Automatic Air Maintenance Device

Pressure Reducing Type with

Field-Adjustable Pressure Regulator

Page 1 of 4 FEBRUARY 2020 TFP1221

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-1 Automatic Air

Maintenance Device is an automatic,

field-adjustable, pressure reducing

device. It is used to control the pres-

sure in a dry pipe sprinkler system, pre-

action system, or dry pilot line system

of a dry pilot actuated deluge or preac-

tion valve.

The Model AMD-1 Device is utilized

in applications where there is a com-

pressed air (or nitrogen) source con-

trolled at a higher pressure than the

desired system pressure. Pressure

sources include plant air supplies with

their own automatic compressor con-

trols or nitrogen supplies with single-

stage, cylinder-mounted pressure

regulators.

The Model AMD-1 Automatic Air Main-

tenance Device is a re-designation for

the Central Model D-2, Gem Model

F324, and Star Model S460.

NOTICE

The Model AMD-1 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.

Installation

The TYCO Model AMD-1 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 inlet air supply and the Model

AMD-1 Device, as well as between

the Model AMD-1 Device and the

system to pressurize.

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

loaded, rubber-faced, swing-type

check valve between the Model

AMD-1 Device and the system to

pressurize. A check valve of this

type is provided in the air supply

trim of TYCO dry pipe and preac-

tion valves.

Technical

Data

Approvals

UL and C-UL Listed

FM Approved

NYC Approved under MEA 206-02-E

Maximum Inlet Air (or Nitrogen)

Supply Pressure

200 psi (13,8 bar)

Field-Adjustable Outlet Pressure

Range

5 to 70 psi (0,4 to 4,8 bar)

Assembly

Major components illustrated in Figure

1 are factory assembled with galva-

nized steel nipples and malleable iron

pipe ﬁttings.

Operation

The By-Pass Valve in the Model AMD-1

Automatic Air Maintenance Device is

opened to quickly ﬁll the system during

initial pressurization. Once the required

system pressure has been reached,

the By-Pass Valve is closed and the

Air Supply Control Valve is left open to

place the Model AMD-1 Device in auto-

matic operation.

When there is a small leak in the

system, the Pressure Regulator auto-

matically maintains system pressure at

the preset level. The 3/32 in. (2,4 mm)

oriﬁce in the Restrictor Check Valve

limits the ﬂow of air from the Pressure

Regulator into the system to a value

signiﬁcantly less than that exhausted

by the operation of a 5.6 K-factor

sprinkler.

TFP1221

Page 2 of 4

Setting

Procedure

The TYCO Model AMD-1 Automatic

Air Maintenance Device must be

set in accordance with the following

instructions:

1. Determine the pressure that meets

the minimum requirements of the

system to pressurize.

2. Close the Model AMD-1 By-Pass

Valve, and close the Model AMD-1

Air Supply Control Valve.

3. Open the control valve in the air

supply trim of the system to pres-

surize and then reduce the system

air pressure to 0 psi.

4. Close the control valve in the

air supply trim of the system to

pressurize.

5. Remove the system pressure gauge

from its connection and temporari-

ly install it in the 1/4 in. NPT Model

AMD-1 Gauge Test Port.

CAUTION

Before removing the plug, make certain

that the piping to which the Model

AMD-1 Gauge Test Port is connected

is at 0 psi. Failure to do so may result

in personal injury or property damage.

6. Open the Air Supply Control Valve

in the Model AMD-1 Device.

7. While observing the relocated pres-

sure gauge, adjust the output pres-

sure of the Pressure Regulator. Pull

the knob out and away from the

Pressure Regulator body and then

slowly turn the knob clockwise, as

viewed from the knob end of the

Pressure Regulator, to increase

pressure, and counter-clockwise to

decrease pressure.

When decreasing pressure, the air

pressure must be relieved down-

stream of the Pressure Regulator

by temporarily opening the control

valve in the air supply trim of the

system to pressurize, assuming that

the system to pressurize is at 0 psi.

After the Pressure Regulator is set,

push the knob in and towards the

Pressure Regulator body to snap it

in a locked position.

8. Close the Air Supply Control Valve

in the Model AMD-1 Device.

9. Return the system air pressure

gauge to its normal location. Re-

install the 1/4 in. pipe plug in the

Model AMD-1 Gauge Test Port. Ap-

ply pipe-thread sealant sparingly to

the plug threads only.

CAUTION

Before removing the pressure gauge,

make certain that the piping to which

the Model AMD-1 Gauge Test Port is

connected is at 0 psi. Failure to do so

may result in personal injury or prop-

erty damage.

10. Open the control valve in the

air supply trim to the system to

pressurize.

11. Open the Air Supply Control Valve

in the Model AMD-1 Device.

12.Open the By-Pass Valve in the

Model AMD-1 Device.

13. Close the By-Pass Valve after the

system is pressurized to approxi-

mately 5 psi (0,4 bar) less than the

minimum required system pressure

determined in Step 1.

14. After the system pressure stabi-

lizes, note the value and compare

with the requirement. Re-adjust the

Pressure Regulator, as required.

NOTICE

If the system was over-pressurized

during manual fill, open a suitable

connection to the system and manu-

ally reduce the pressure to the desired

value. The Model AMD-1 Automatic Air

Maintenance Device then automatically

maintains the preset system pressure.

The Restrictor Check Valve prevents

the Pressure Regulator from bleeding

down the system pressure.

In order to minimize the time for system

trip in the event of a sprinkler opera-

tion, set the system pressure at the

minimum required value.

(50,8 mm)

16-1/8""

(409,6 mm)

8-1/2"

(215,9 mm)

3-1/4"

(82,6 mm)

(NORMALLY

CLOSED)

1/2" NPT

INLET CONNECTION

(FROM COMPRESSED

AIR SUPPLY)

1/2" NPT

OUTLET

CONNECTION

AIR SUPPLY

CONTROL VALVE

(NORMALLY OPEN)

P/N 46-048-1-002

PRESSURE

REGULATOR

(ADJUSTABLE)

(TO SYSTEM)

STRAINER

RESTRICTOR

CHECK VALVE

P/N 46-047-1-004

P/N 92-324-1-012

P/N 52-353-1-002

P/N 92-326-1-003

1/4" NPT

GAUGE

TEST PORT

BY-PASS VALVE

LABEL

FIGURE 1

MODEL AMD-1

AUTOMATIC AIR MAINTENANCE DEVICE

TFP1221

Page 3 of 4

Care and

Maintenance

The TYCO Model AMD-1 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.

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 authorities

and advise those responsible for moni-

toring 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-

ommend to be inspected, tested,

and maintained by a qualiﬁed Inspec-

tion Service in accordance with local

requirements and/or national code.

The Model AMD-1 Device must be

inspected quarterly in accordance with

the following instructions:

1. Verify that the By-Pass Valve is

closed.

2. Close the Model AMD-1 Air Sup-

ply Control Valve and clean out the

1/4 in. Strainer located at the inlet

to the Restrictor Check Valve. Be

sure to reinstall the strainer screen

and tighten the cap securely.

3. Open the Model AMD-1 Air Sup-

ply Valve and verify that the control

valve in the air supply trim to the

system to pressurize is open.

4. Verify that the system pressure is

essentially the same as the previ-

ously established requirement. If

not, adjust the system pressure as

follows:

a. Close the system’s main con-

trol valve and open the main

drain valve. If the system is so

equipped, close the Accelera-

tor Control Valve.

b. Follow Steps 1 to 14 in the

Setting Procedure section.

c. Slowly open the Accelerator

Control Valve, as applicable.

d. Slowly open the main con-

trol valve. After water begins

to ow, slowly close the main

drain valve, then completely

open the main control valve.

The Model AMD-1 Automatic

Air Maintenance 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-1 Device

Specify: Model AMD-1 Automatic Air

Maintenance Device, P/N 52-324-2-002

Replacement Parts

Specify: (description), P/N (specify per

Figure 1)

TFP1221

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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