Avtec M20H Installation Manual

OPERATORS MANUAL

This manual provides
Installation & Operating instructions for

MIST-A-FIRE
SYSTEM

NOTIFY CARRIER OF DAMAGE AT ONCE.

It is the responsibility of the consignee to inspect the
container upon receipt of same and to determine
the possibility of any damage, including concealed
damage. Avtec suggests that if you are suspicious
of damage to make a notation on the delivery re­ceipt. It will be the responsibility of the consignee to
file a claim with the carrier. We recommend that you
do so at once.

Manufacture Service/Questions 888-994-7636.

Information contained in this document is known to be
current and accurate at the time of printing/creation.
Unified Brands recommends referencing our product line
websites, unifiedbrands.net, for the most updated product
information and specifications.

P/N OMANUAL_MAF-02/07

1055 Mendell Davis Drive

Jackson, MS 39272

888-994-7636, fax [phone]

avtecind.com

I.
II.

III.

IV.

TABLE OF CONTENTS

GENERAL DESCRIPTION
INSTALLATION
A. General
B. Contractor Requirements
SEQUENCE OF OPERATION
A. General
B. Normal Operation
C. Trouble Conditions

1.0 Power Loss

2.0 Loss Of Water Pressure

3.0 Supervised Shut-Off Valve
D. Fire Condition
E. Diagnostic LED Indicators
F. Input/Output Capacities
G. Component Layout and Identification
H. Gas Delay Reset [GDRIIA]

1.0 General

2.0 Visual Indicators

2.1 Red LED [Fuel Off]

2.2 Amber LED [Fuel Reset]

2.3 Green LED [Fuel On]

3.0 Fire Condition

4.0 Resetting The Circuit

5.0 Input/Output Capacities
I. Gas Delay Reset [GDRIIB]

1.0 General

2.0 Visual Indicators

2.1 Red LED [Fuel Off]

2.2 Amber LED [Fuel Reset]

2.3 Green LED [Fuel On]

3.0 Battery Circuit

4.0 Fire Condition

5.0 Resetting The Circuit

6.0 Input/Output Capacities
ENGINEERING DATA
A. General

1.0 Pipe Size

2.0 Water Pressure

3.0 Volume Of Water [GPM]

4.0 Duct and Plenum Protection for Non-Water Wash Ventilators

4.1 Plenum

4.2 Exhaust Duct

4.3 Additional Sprinklers

5.0 Pipe Sizing Guide

6.0 Sprinkler Data

6.1 Temperature Rating & Frame Color

6.2 Angle of Deflection

6.3 Orifice Size

6.4 Material & Finish

7.0 Sprinkler Locations

7.1 Canopy Hood

7.2 Backshelf Hood

7.3 Exhaust Duct and Plenum

7.4 Fryers

7.5 Ranges, Griddles, Hot Tops and Hot Plates

7.6 Salamander Broiler

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7.7 Upright Broiler

12

V.
VI.

VII.
VIII.

7.8 Tilting Braising [Fry] Pan

7.9 Conveyor Broiler

7.10 Broilers [Gas, Electric and Solid Fuel]

7.11 Ranges, Griddles, Hot Tops

7.12 Ranges, Griddles, Hot Tops w/Overshelf Salamander Broiler

8.0 Test Valve Placement

9.0 Control Panel Equivalent Pipe Length

10.0 Parts List
MAINTENANCE
SYSTEM TESTING
A. General
B. Certification and Start-Up Report
QUICK REFERENCE VISUAL INDICATOR TROUBLE GUIDE
WARRANTY

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I.GENERAL DESCRIPTION

Water spray systems used for extinguishing cooking
equipment [grease] fires are recognized by the National
Fire Protection Association's (NFPA) Standards 13 and

96.

The Mist-A-Fire system is a water spray system that
includes sprinklers to extinguish a fire.

Note: The word "sprinkler" is used in this document
to indicate either a Listed Sprinkler or a Listed
Automatic Spray Nozzle. The specifications for
sprinklers are given in Section

All plumbing within the canopy is pre-piped chrome
plated or stainless steel where exposed.
Interconnection from the building sprinkler system to
the Mist-A-Fire Control Panel and from the Control
Panel to the ventilator are to be made by the Sprinkler
Contractor.

The Mist-A-Fire Control Panel is Listed by Underwriters
Laboratories Inc. (UL) as an Attachment to Sprinkler
Systems as shown in the UL Fire Protection Equipment
Directory. The Panel complies with the following
specification:

NFPA 72: National Fire Alarm Code

All support plumbing and electrical components for the
Mist-A-Fire System are located within the Mist-A-Fire
Control Panel or Energy Distribution System. The
panel should be located in an accessible area

The Mist-A-Fire System is to be used in a building with
a "wet" sprinkler system and installed in accordance
with NFPA 13.

It is suggested that prior approval for installation be
obtained from the Authority Having Jurisdiction.

IV.,6.0.

.

II.INSTALLATION

A. General

Water pipes up to and including the sprinklers for
cooking equipment surface protection, plenum
protection [behind filter banks] and duct protection
at the duct collar are installed by AVTEC during
ventilator construction. Additional duct protection is
usually installed at the job site.
Installation at the job site should be handled by the
Sprinkler Contractor.

The local district office of Grinnell Fire Protection
Systems may also be contacted. They can handle
the contracting and entire installation. The
telephone number for the local district office can be
found in the Yellow Pages under "Sprinklers-

Automatic Fire Systems", with over 70 locations
across the United States and Canada.

B. Contractor Requirements

Refer to the AVTEC blueline drawing for your
specific project. All connections are shown under:

MIST-A-FIRE ELECTRICAL CONTRACTOR
REQUIREMENTS [NOTES: ME1A, ME1B,
ME2] AND MIST-A-FIRE SPRINKLER
CONTRACTOR REQUIREMENTS [NOTES:
MC1, MP1, MP2, MP3, MP4, MP5, MP6,
General Notes]

III. SEQUENCE OF OPERATION

A. General

This is a guide to the operation and testing of the
Mist-A-Fire Control Panel. Personnel who are
responsible for the operation and maintenance of
the system should be familiar with the Panel and all
of the detectors and alarm devices interfaced with it.
Installations vary greatly from site to site, therefore,
it is necessary for the operator to know what to
expect from his particular system.

B. Normal Operation

When power is applied and all monitored circuits
are in their normal operating condition, the green
Light Emitting Diode [LED] will be illuminated and
the Liquid Crystal Display [LCD] will read, "NORMAL
OPERATION".

C. Trouble Conditions

A Trouble Condition occurs when a monitored
circuit detects a condition which may prevent the
Mist-A-Fire System from properly reacting to a fire.
A Trouble Condition should be corrected as soon as
possible. Whenever a Trouble Condition occurs, an
alarm horn will sound [which can be silenced by
pressing the MAF Horn Silence Switch] and the
Trouble Relay contacts [TB-7] will switch.

1.0 Power Loss
If the power supply is interrupted the amber LED will
illuminate, an alarm will sound and the display will
read "TROUBLE POWER LOSS". The alarm can
be silenced by pressing the MAF Horn Silence
Switch, but the amber LED will remain lit, the
display will continue to display "TROUBLE POWER
LOSS" and the TB-7 contacts will remain in the
Trouble position. When power is restored, the
system will return to its Normal Operation condition.

2.0 Loss of Water Pressure
If the water pressure drops below thirty pounds per
square inch [30 psi] and the system is equipped with
the low pressure switch, the amber LED will
illuminate, an alarm will sound and the display will
read "TROUBLE PRESSURE LOW". The alarm
can be silenced by pressing the MAF Horn Silence
Switch, but the amber LED will remain lit, the
display will continue to read "TROUBLE

- 1 -

PRESSURE LOW' and the TB-7 contacts will
remain in the Trouble position. When pressure
returns above 30 psi, the system will automatically
return to the Normal Operation condition.

3.0 Supervised Shut-off Valve
If the supervised shut-off valve is closed, the amber
LED will illuminate, an alarm will sound, fuel will
shut OFF, and the display will read, "TROUBLE
VALVE CLOSED". The alarm can be silenced by
pressing the MAF Horn Silence Switch, but the
amber LED will remain lit, the display will continue to
display "TROUBLE VALVE CLOSED" and the TB-7
contacts will remain in the Trouble position. When
the valve is fully opened, the system will
automatically return to the Normal Operation
condition.

NOTE: If the system is equipped with both the

optional Low Pressure Switch and the Supervised
Shut-off Valve, the amber LED will illuminate, the
horn will sound, the Trouble Relay contacts [TB-7]
will switch to the Trouble position and the LCD will
alternate between "TROUBLE PRESSURE LOW"
and "TROUBLE VALVE CLOSED". Pressing the
Horn Silence Switch will turn OFF the alarm.

Illuminates when the MAF II Horn

Silence Switch is pressed.

D-22 GREEN
Illuminates when the 120vac power
supply is energized.

D-24 GREEN
Illuminates when the MAF II Supervised
Shut-off Valve is open [circuit closed].

D-25 GREEN
Illuminates when the MAF II Water

Flow Switch is not actuated [circuit

closed].

D-26 GREEN
Illuminates when the MAF II Water

Pressure Switch is above 30 psi.

[circuit closed].

D-32 RED
Illuminates when the battery is being

charged.

D. Fire Condition

A fire condition is detected when water flows
through the system [actuating the Water Flow
Switch] as a result of either an activated sprinkler or
an open test valve. In order to avoid nuisance
actuation, there is an adjustable delay built into the
system. When the Water Flow Switch is actuated,
the red LED will illuminate, the display will flash
"FIRE", the alarm will sound, fuel will shut OFF, and
the Fire Relay contacts [TB-8] will switch. The
alarm CANNOT be silenced. The panel will remain
in Fire Condition as long as water continues to flow
through the Water Flow Switch. When the flow of
water has stopped [either as a result of closing the
test valve or closing the Supervised Shut-off Valve]
the fire condition will automatically clear itself.

NOTE: By closing the Supervised Shut-off Valve,

the system will be put into a Trouble Condition.
[See Section III. C. 1.2]

E. Diagnostic LED Indicators

D-12 GREEN
Illuminates when the MAF II horn is
energized.

D-15 RED
Illuminates when the Water Flow

Switch is activated.

D-17 RED

- 2 -

F. Input/Output Capacities

TB-1 1-Line Hot
2-Line Neutral
3-Mech. Ground

TB-2 * 1-Switched Hot
* 2-Neutral
* 3-Switched Hot
* 4-Neutral
* 5-Switched Hot
* 6-Neutral

TB-3 * 1-Switched Hot
* 2-Neutral
* 3-Switched Hot
* 4-Neutral
* 5-Switched Hot
* 6-Neutral

TB-4 * 1-Switched Hot
* 2-Neutral
* 3-Switched Hot
* 4-Neutral

TB-5 * 1-Switched Hot
* 2-Neutral
* 3-Switched Hot
* 4-Neutral
* 5-Switched Hot
* 6-Neutral

TB-6 * 1-Switched Hot
* 2-Neutral
3-Switched Hot
4-Neutral
5-Neutral
6-Hot

TB-7 1-NC
2-C
3-NO
4-NC
5-C
6-NO

TB-8 1-NC
2-C
3-NO
4-NC
5-C
6-NO

TB-9 * 1-Line Hot
* 2-Switched Hot
* 3-Line Hot
* 4-Switched Hot
* 5-Line Hot
* 6-Switched Hot

TB-10 1-Line Hot
2-Switched Hot
3-Line Hot
4-Switched Hot
5-Line Hot
6-Switched Hot

TB-11 * 1-Detergent
* 2-Probe
3-Positive
4-Negative

TB-12 1-Positive
2-Negative
3-Positive
4-Negative

















Incoming Power Supply 120vac, 15 amps. 60 Hz




 Wash Solenoid x 1, 120vac, 1.5 amps max.

 Wash Solenoid x 2, 120vac, 1.5 amps max.

 Wash Solenoid x 3, 120vac, 1.5 amps max.


 Wash Solenoid x 4, 120vac, 1.5 amps max.

 Wash Solenoid x 5, 120vac, 1.5 amps max.

 Wash Solenoid x 6, 120vac, 1.5 amps max.


 Wash Solenoid x 7, 120vac, 1.5 amps max.

 Wash Solenoid x 8, 120vac, 1.5 amps max.


Detergent Pump, 120vac, 1.5 amps max.




PAWS alarm Horn, 120vac, 16 ma. max.




Fan Contactor, 120vac, 1.5 amps max.




Spare Output [PAWS] 120vac, 1.5 amps




Spare Output ]MAF ] 120vac, 1.5 amps




Auxiliary



Power Tap



Trouble Dry Contacts [MAF ] 1.5 amps @ 28vdc/120vac

Trouble Dry Contacts [MAF ] 1.5 amps @ 28vdc/120vac

Fire Dry Contacts [MAF ] 1.5 amps @ 28vdc/120vac

Fire Dry Contacts [MAF ] 1.5 amps @ 28vdc/120vac

PAWS Supervised



Valve Switch



PAWS Manual



Fire Pull Switch



PAWS Automatic



Fire Switch



MAF  Water



Flow Switch



MAF  Water



Pressure Switch



MAF  Supervised



Valve Switch



20vdc, 2 milliamps




MAF  Horn, 12vdc, 1.5 amps




Battery, 12v, 5A Hours




Auxiliary Power Tap, 19vdc, 0.5 amps




120vac, 8 amps max.


















120vac, 25 milliamps

120vac, 25 milliamps

120vac, 25 milliamps

12vdc, 25 milliamps

12 vdc, 25 milliamps

12vdc, 25 milliamps

- 3 -

- 4-

- 5-

- 6-

H. Gas Fuel Reset Station [GDRIIA]

1.0 General

The Gas Fuel Reset Station [GDRIIA] is primarily

designed to provide a latching circuit for the gas

valve[s] which is held open electrically. In addition,

it provides circuitry to maintain the latching relay in

the event of a momentary power loss shorter than

one and one-half [1-1/2] seconds. A power loss

longer than one and one-half [1-1/2] seconds will

require that the circuit must be physically reset. [A

contactor may be used for electrical cooking

equipment].

2.0 Visual Indicators

2.1 Red Light Emitting Diode [LED] - Fuel Off
The red LED will glow when power to the gas valve
solenoid[s] is interrupted and the fuel flow is shut
off.

equipment will now need to be manually relit.

5.0 Input/Output Capacities

Connector "A" [12 pin]

1. Line Hot Incoming Power Supply

2. Line Neutral 120v/60/1ø, 2 amps

3. Common Form "C" Fire Switch

1.5 amps, 120vac

4. "Tripped" or "Fire" Form "C" Fire Switch

5. "Armed" or "Normal" Form "C" Fire Switch

6.  Audio Alarm
12vdc, 1.5 amps

7.  Audio Alarm

8. Switched Hot Fire Shut-Off, Breaker or Relay
120v/60/1.5amps

9. Neutral Fire Shut-Off, Breaker or Relay

2.2 Amber Light Emitting Diode [LED] - Fuel Reset
The amber LED will glow when power is available to
reset the latching circuit and the fuel flow is shut off.
An audio alarm accompanies the amber LED
indicating to the operator that fuel flow is ready to be
restored.

2.3 Green Light Emitting Diode [LED] - Fuel On
The Green LED will glow when the latching circuit is
energized and fuel is available to the cooking
equipment.

3.0 Fire Condition
When the extinguishing system is in the
"TROUBLE" or "FIRE" condition, power to the
solenoid[s] and/or contactor[s] is interrupted. If the
circuit breaker[s] is equipped with a fire shut off
connection, the circuit breaker will trip off. Pressing
the "Push To Reset" switch will not allow power to
be applied to the gas valve solenoid[s].

NOTE: It is recommended that the circuit breaker[s]

be equipped with self-interrupting capabilities.

4.0 Resetting the Circuit
When power is restored after an interruption greater
than one and one-half [1-1/2] seconds [e.g., after a
fire, power outage or initial start-up] the amber "Fuel
Reset" LED and red "Fuel Off" LED will glow and
the audio alarm will sound.

CAUTION

Ensure that all cooking equipment controls are

in the "OFF" position before pressing the "Push
To Reset" switch. Pilot lights must be manually
relit after fuel flow is restored.

Press the "Push To Reset" switch. The audio alarm

will be silenced, the amber and red LED's will go out
and the green "Fuel ON" LED will illuminate. The
pilot lights on the individual pieces of cooking

10. Switched Hot Gas Solenoid
120v/60/1.5amps

11. Neutral Gas Solenoid

12. (Unused)

I. Gas Fuel Reset Station [GDRIIB]

1.0 General
The Gas Fuel Reset Station [GDRIIB] converts
incoming power to charge the batteries and
energize the gas valve solenoid[s]. It also
incorporates a latching circuit for the gas valve[s]
which is held open electrically.

The GDRIIB is also connected to the cooking

equipment fire extinguishing system. In the event of
actuation of the extinguishing system, power is
removed from the gas valve solenoid[s] and applied
to the circuit breaker fire shut-off terminals, thus
cutting the fuel source.

2.0 Visual Indicators

2.1 Red Light Emitting Diode [LED] - Fuel Off

The red LED will glow when power to the gas valve
solenoid[s] is interrupted and the fuel flow is shut
off.

2.2 Amber Light Emitting Diode [LED] Fuel Reset

The amber LED will glow when power is available to
reset the latching circuit and the fuel flow is shut off.
An audio alarm accompanies the amber LED,
indicating to the operator that fuel flow is ready to be
restored.

2.3 Green Light Emitting Diode [LED] -Fuel On

The Green LED will glow when the latching circuit is
energized and fuel is available to the cooking
equipment.

- 7-

3.0 Battery Circuit
The GDRIIB contains a circuit to constantly provide
power to charge the batteries and operate the gas
valve solenoid[s]. A red LED located on the reverse
side glows whenever the batteries are being
charged. In the event of a power loss, the gas
valve[s] will continue to be held open for as long as
one and one-half [1-1/2] hours depending on size,
type and quantity of gas valve solenoid, and the
condition of the batteries.

4.0 Fire Condition
When the extinguishing system is in the
"TROUBLE" or "FIRE" condition [other than power
loss] power to the solenoid[s] is interrupted. If the
circuit breaker[s] is equipped with a fire shut-off
connection, the circuit breaker will trip off. Fuel may
not be restored until the fire condition has been
cleared.

6.0 Input/Output Capacities
Connector "A" [12 pin]

1. Line Hot Incoming Power Supply

2. Line Neutral 120v/60/1ø, 2 amps

3. Common Form "C" Fire Switch

4. "Tripped" or "Fire" Form "C" Fire Switch

5. "Armed" or "Normal" Form "C" Fire Switch

1.5 amps, 120vac

6.  Audio Alarm
12vdc, 1.5 amps

7.  Audio Alarm

8. Switched Hot Fire Shut-Off, Breaker or Relay

120v/60/1.5amps

9. Neutral Fire Shut-Off, Breaker or Relay

10. (Unused)

11. (Unused)

12. (Unused)

NOTE: It is recommended that the circuit breaker[s]

will be equipped with self-interrupting capabilities.

5.0 Resetting the Circuit
After power to the gas valve solenoid[s] has been
interrupted [e.g., after a fire or at initial start-up] and
is restored, the red "Fuel Off" LED and amber "Fuel
Reset" LED will glow and the audio alarm will
sound.

CAUTION
Ensure that all cooking equipment controls are
in the "OFF" position before pressing the "Push
to Reset" switch. Pilot lights must be manually
relit after fuel flow is restored.

Press the "Push To Reset" switch. The audio alarm

will be silenced, the amber and red LED's will go out
and the green "Fuel ON" LED will illuminate. The
pilot lights on the individual pieces of cooking
equipment will now need to be manually relit.

Connector "B" [9 pin]

1. Hot [#4] Transformer Primary
[120v/60/1ø]

2. Neutral [#2] Transformer Primary

3. Hot [#6] Transformer Secondary
[32v]

4. Common [#8] Transformer Center Tap
[32v]

5. Hot [#10] Transformer Secondary

6.  Batteries
[24vdc]

7.  Batteries

8.  Gas Solenoid
[24vdc, 1.5 amps]

9.  Gas Solenoid

- 8-

IV. ENGINEERING DATA

A. General

The Mist-A-Fire system is to be interconnected to
the building sprinkler system. The following are
requirements of the system:

1.0. Pipe Size
Pipe size is determined by the quantity of sprinklers
required. [See Pipe Sizing Guide, paragraph 5.0,
figure 1]

2.0. Water Pressure
30 PSI Minimum
as shown on the pressure gauge within the panel.
NOTE: If water pressure exceeds 175 PSI, a
pressure reducing valve [approved by the authority
having jurisdiction] must be supplied and installed
ahead of the Mist-A-Fire panel by the Sprinkler
Contractor [or other prescribed contractor].

3.0. Volume of Water [GPM]
Refer to Pipe Sizing Guide, paragraph 5.0 [figure 1]
to determine the volume of water required. We
recommend that the building sprinkler contractor
review plans to ensure that adequate water volume
will be supplied.

4.0. Duct and Plenum Protection

4.1. Plenum
One (1) Listed sprinkler or spray nozzle will protect
up to ten feet (10'-0") of plenum [maximum of five
feet (5'-0") from the centerline of sprinkler].
Temperature rating: 325 - 375°F. The sprinkler is to
be located to provide a maximum distance of 5'-0"
from the center line of the sprinkler to the end of the
plenum or 10'-0" to the next sprinkler.

4.2. Exhaust Duct
Temperature rating: 325 - 375°F. Each exhaust
duct will be provided with one (1) sprinkler.
Additional sprinklers may be required per NFPA 13,
standard for the Installation of Sprinkler Systems.
All exhaust duct sprinklers [unless otherwise
specified] will have a removable panel for servicing.

4.3. Additional Sprinklers
NFPA 13 requires sprinklers at the top of each
vertical duct riser and at each duct offset except
when all equipment is served by Listed grease
extractors.

, 175 PSI Maximum

5.0. Pipe Sizing Guide (Fig. 1)
The following data is based on NFPA 13 and 96.
Check with the authority having jurisdiction to
determine the quantity and location of sprinklers to
comply with local codes.

fig. 1

NOTES:

1. All data based upon a flow pressure of
30 PSI out the sprinkler.

2. 1¼" minimum pipe size for ventilators requiring duct
and plenum protection.

6.0. Sprinkler Data

6.1. Temperature Rating & Frame Color:
250 - 300°F - Blue
325 - 375°F - Red
400 - 475°F - Green
500 - 575°F - Orange

6.2. Angle of Deflection:
150° - 180°

6.3. Orifice Size:
Diameter : 0.25" minimum
K factor : 1.3 minimum

6.4. Material & Finish:
Duct & Plenum: Brass, natural
Surface Protection: Brass, chrome plated

If these additional sprinklers are required, they
shall be supplied and inst al l ed by the Sprinkler
Contractor and connected to the b uilding
sprinkler system.

- 9-

7.0. Sprinkler Locations

7.1. Canopy Hood
Typical sprinkler drops for canopy hoods are
shown in figure

- 10-

7.2. Backshelf Hood
Typical sprinkler drop for back shelf hood is shown
in figure 3.

7.3. Exhaust Duc t and Plenum
Typical Sprinkler drop for exhaust duct and plenum
protection is shown in figure 2.

ranges, griddles, hot tops and/or hot plates. The
sprinkler must be located within a 6" by 6" area
[deflector plane] starting 1" in front of the high shelf
and centered [lef t to right] over the equipment. The
mounting height of the sprinkler is 24" minimum and
42" maximum, measured from the cooking surface
to the deflector of the sprinkler. [See figure 5]

7.6. Salamander Broiler
One (1) sprinkler is required for each salamander
broiler. This sprinkler will protect the equipment
below the salamander as long as the sprinkler falls
within the sprinkler plane required for that particular
piece of cooking equipment. The sprinkler may be
located within an area 0-3" in front of the top edge
of the compartment opening, or within a 6" by 6"
area centered [left to right] and 1" above the top of
the broiler. [See figure 6]

7.4. Fryers
One (1) sprinkler is required for each fryer, provided
that the fryer does not exceed 20" in any plan
dimension. [See figure 4]

NOTE: Sprinklers must be Listed for use above
deep fat fryers. Model EA-1, 160º angle, 250 ­325ºF, 1/4" Or ifice, date coded prior to O ctober 2,

1997.

7.5. Ranges, Griddles, Hot Tops and Hot Plates
with High Shelves
One (1) sprinkler will cover up to six (6) linear feet of

- 11-

7.7. Upright Broiler
Upright broilers require one (1) sprinkler within a 6"
by 6" area [center left to right, and fr om the front
edge of the equipment forward] and 1" above the
top of the broiler. [See f igure 7]

7.8. Tilting Braising [Fry] Pan
One (1) sprinkler will protect a tilting braising [fry]
pan up to 48" wide. The sprinkler must be located
within a 6" by 6" area [sprinkler plane] starting 1" in
front of the center of the cooking surface and
centered from left to right. The mounting height of
the sprinkler is 24" minimum and 42" maximum,
measured from the cooking surface to the deflector
of the sprinkler. [See figure 8] The sprinkler may
be offset forward to clear lid.

within a 6" x 6" area [sprinkler plane] over the center
of the equipment. [See figure 9]

7.10. Broilers [G as, Electric and Solid Fuel]
One (1) 500o sprinkler will protect up to 48" of
broiler. The sprinkler must be located within a 6" x
6" area [s pr inkler plane] over the center of the
equipment. The mounting height of the sprinkler is
a minimum of 24" and a maximum of 42" measured
from the cooking surface to the deflector of the
sprinkler. [See figure 10]

7.9. Conveyor Broiler
One (1) 500°F s pr inkler is required for each
conveyor broiler. The sprinkler must be located

- 12-

7.11 Ranges, Griddles, Hot Tops and Hot Plates
One (1) sprinkler will cover up to 6'-0" of ranges,
griddles, hot tops and/or hot plates. The sprinkler
must be located within a 6 x 6" area [sprinkler plane]
centered above the equipment. The mounting
height of the sprinkler is a minimum of 24" and a
maximum of 42" measured from the cooking
surface to the deflector of the sprinkler. [See figure
11]

8.0 Test Valve Placement
Each Mist-A-Fire System is supplied with a test valve
located at the end of the piping system above the
ventilator. Opening the test valve simulated the discharge
of a single sprinkler.

The location of the test valve is shown on the AVTEC
drawing f or your specific installation.

The test valve will be pre-piped to the wash plenum on
auto wash [AW series] ventilators. Non-auto wash [AF,
AX and AL series] hoods are provided with a 3/4" hose
thread connector that is to be routed to a drain for testing.

9.0 Friction Loss in Equivalent Pipe Length for Mist­A-Fire Cabinet

Pipe Size, NPT Equivalent Length, Feet

1" 16

1 1/4" 17

7.12 Range/Griddle/Hot Top w/ overshelf

salamander broiler

When a Range/Griddle or a Hot Top is combined

with an overshelf Salamander Broiler, (2) Mist-A-

Fire nozzles are provided. [See figure 12]

1 1/2" 17

2" 19

- 13-

MIST-A-FIRE PARTS LIST

ELECTRICAL

AVTEC PART NO. DESCRIPTION

EL FUS 0304 Fuse [SC-15]
EL BLK 0315 Fuse Block [Holder]
EL SWT 0313 Flush Toggle Switch
EL HRN 0302 Horn
EL BAT 0301 12v Battery 5amp HR
EL ASY 0301 MAF M20 Circuit Board Assembly
EL ASY 0302 P15 MAF/PAWS Circuit Board Assembly
EL TER 0301 Output terminal for converting MAF/PAWS Assemblies
EL RLY 0317 Output relay for converting MAF/PAWS Assemblies
EL ASY 0304 Gas Delay Reset Assembly GDRIIA,120v AC
EL ASY 0305 Gas Delay Reset Assembly Model #GDRIB,24vdc
PL SHT 0302 Replacement Red Plexiglass for 412-0320

[MAFII Assembly Model No. M20]
PP LBL 0304 MAF Faceplate w/o Slot
PP LBL 0305 GDRII Faceplate w/Slot

PLUMBING

AVTEC PART NO. DESCRIPTION

PB VLV 0309 3/8 ball valve [test valve]
PB VLV 0311 1" Supervised Valve
PB VLV 0312 1-1/4" Supervised Valve
PB VLV 0313 1-1/2" Supervised Valve
PB VLV 0314 2" Supervised Valve
EL SWT 0328 1" Flow Switch w/two sets of contacts
EL SWT 0345 Pressure Switch
EL SWT 0329 2" Flow Switch
PB TEE 9802 1" x 1" x TEE, B.I.
PB TEE 0314 1-1/4" x 1-1/4" x 1" TEE, B.I.
PB TEE 0311 1-1/2" x 1-1/2" x 1" TEE, B.I.
PB CPL 550 1/2" Coupler, Stainless Steel
PB CPL 0318 Chrome Bell Reducer 1"-1½"
PB UNN 0310 1" Union, B.I.
PB UNN 0309 1-1/4" Union, B.I.
PB UNN 0308 1-1/2" Union, B.I.
PB UNN 0307 2" Union, B.I.
AS NZL 0305
AS NZL 0306 MIST-A-FIRE nozzle, 325ºF, 160º Deflector for Duct & Plenum Protection
AS NZL 0307
PB TUB 0308 Chrome Sleeving 1-3/8" O.D.
PB CLM 0301 1" pipe clamp
PB CLM 0302 1-1/4" pipe clamp
PB CLM 0303 1-1/2" pipe clamp
PB CLM 0304 2" pipe clamp

MIST-A-FIRE nozzle, 325°F, 160°, deflector, for surface protection

MIST-A-FIRE nozzle, 500°F, 160° deflector for surface protection

- 14-

V. MAINTENANCE

AVTEC recommends the Mist-A-Fire sprinklers
receive periodic cleaning with hot detergent water and
a bristle brush to remove grease and lint particles.
Frequency of cleaning will vary depending on the
installation, however it is imperative the sprinklers are
kept clean for accurate temperature sensitivity and
activation.

VI.SYSTEM TESTING

A. General

Periodic system testing is required to ensure
reliability. N.F.P.A. Standards 96 & 13
recommend testing, and inspection of the fire
suppression system every six months, including a
water flow test. Local fire codes may specify the
frequency and depth of such tests. These codes
will vary from community to community and also
between installations, depending on both the
installation and type of building[s] involved.

system is to be considered operational.

B. Amber LED On

1.0 Display reads "TROUBLE POWER LOSS".

1.1 120vac power interrupted or not
connected.

1.2 The audio alarm sounds and can be
silenced by pressing "MAF Horn
Silence" switch.

2.0 Display reads "TROUBLE PRESSURE LOW".

2.1 Water pressure has dropped below 40 psi.

2.2 The audio alarm sounds and can be
silenced by pressing "MAF Horn
Silence" switch.

3.0 Display reads "TROUBLE VALVE CLOSED".

3.1 Supervised shut-off valve is not fully open.

3.2 The audio alarm sounds and can be
silenced by pressing "MAF Horn Silence"
switch.

NOTE: If your system is using the auxiliary alarm
system connection, to a local energy master box
or for a remote transmitter, inform the personnel at
the receiving panel of the time you expect to begin
testing. When testing has been completed call
them again to let them know. Personnel in the
area where the alarm device testing is to take
place should also be advised. The ideal time to
test the alarm system is when a minimum number
of people are in the building to minimize confusion
or disruption of normal activities. However,
personnel in the affected area should be familiar
with fire alarm operation and should practice
evacuation procedures as appropriate.

B. Certification and Inspection Report

A Mist-A-Fire Certification and Inspection Report
will be used for the initial start-up and certification,
usually in the pressence of the local Fire
Inspector.

Subsequent periodic tests should follow the same
procedure. Please perform the test procedures in
the order in which they are presented. If additional
information is required, reference Section

Sequence Of Operation.

III,

C. Red LED On

1.0 Display reads "FIRE, FIRE, FIRE".

1.1 Water flow sensed by the flow switch.
Any spray nozzle discharging water will
cause sufficient flow to actuate the flow
switch.

1.2 The audio alarm cannot be silenced.

2.0 The system can be tested by opening the
test valve located on top of the ventilator.
The water drains into the water wash
compartment on a wash down hood or
requires a water hose routed to a floor
drain or sink on a non-wash down hood
[3/4" hose threads are provided].

3.0 If a nozzle is accidentally broken, notify the
fire department [if they are automatically
signaled], close the supervised valve and
replace the nozzle.

4.0 The fire condition will actuate the fire relay
contacts. Power will be interrupted to the
gas valve solenoid[s] and applied to any
circuit breaker with a relay trip.

VII. QUICK REFERENCE VISUAL INDICATOR

GUIDE
A. Green LED On

1.0 Display reads "NORMAL CONDITION".

1.1 This is the only

condition under which the

- 15-

VIII.

-WARRANTY­AVTEC INDUSTRIES INC. warrants to the original purchaser for use of our products, that any part thereof which
proves to be defective in material or workmanship under normal use within one year from date of installation, will
be replaced free of charge, labor to replace such part is warranted for one year from installation. All warranty labor
to be performed during regular working hours, with no overtime premium.

All Warranty service must be authorized by the factory and be performed by AVTEC's authorized service
personnel.

This Warranty is limited to the United States and Canada.

This Warranty does not apply to any damage resulting from shipping, improper installation, accident, unauthorized
alteration, local codes not previously brought to the attention of AVTEC, misuse, or abuse; and does not cover
loss of food, other products or damage to equipment or property resulting from mechanical or electrical failure.

AVTEC neither makes nor assumes and does not authorize any other person to assume any other obligation or
liability in connection with its products other than that covered in this Warranty.

FOR THE NAME AND LOCATION OF THE NEAREST

AVTEC SERVICE AGENCY, CALL OR WRITE TO:

AVTEC INDUSTRIES INC.

120 KENDALL POINT DR.

OSWEGO, IL 60543-8898

630-851-4800

LOCAL SERVICE AGENCY

- 16-

form no. 14021 rev 0201 © 1998 Avtec Industries Inc.