Midmark M7-2 Service manual

®

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SpeedClave Steam Sterilizers

Model Numbers:

M7 M7

-011 thru -016

-020 thru -022

Serial Number Prefixes:

MH, MJ, MK, ML, MM, MN, V

V

Ser vice and

Par ts Manual

SF-1855 Part No. 004-0454-00 Rev. D (4/1/08)

FOR USE BY MIDMARK TRAINED TECHNICIANS ONLY

GENERAL INFORMATION

Symbols ....................................i

Ordering Parts .......................... i

Model / Serial Number

Location .................................. i

Weights, Dimensions,

Electrical Specifications ....... ii

Model Identification /

Compliance Chart .................. iii

Special Tools ............................ iv

Warranty Information............... iv

General Information

ACCESS PROCEDURES

Removing & Installing:

Covers / Panels ........................ C-2

Tray Plate / Rack ...................... C-3

Draining / Filling Reservoir .....C-4

Section C

WIRING DIAGRAMS & SCHEMATICS

115 VAC models

M7 (-011 / -013 / -014 / -015) ........

M7 (-020 / -022) ............................

:

D-2 D-3

OPERATION & TROUBLESHOOTING

Electrical System:

M7 (-011 thru -016) .......................

M7 (-020 thru -022) .......................

Filling the Chamber ................. A-8

Heat-Up / Sterilization.............. A-14

Section A

Venting the Chamber ............... A-20

A-2 A-4

230 VAC models

M7 (-012 / -016) ............................

Section D

M7 (-021) ......................................

EXPLODED VIEWS / PARTS LISTS

M7 M7

TESTING & REPAIR

Checking for

Pressure Leaks ...................... B-2

Fuse........................................... B-3

Bellows ..................................... B-4

Fill / Vent Valve:

Section B

Table Of Contents

Manual ..........................................

Electronic ......................................

Temperature Regulator Assy .. B-12

Heating Element ....................... B-18

Overheat Thermostats ............. B-22

Pressure Relief Valve ............... B-25

Timer ......................................... B-26

Timer Buzzer ............................ B-30

Temperature Gauge ................. B-31

Door Assembly......................... B-32

Reservoir Tank.......................... B-34

Chamber Assembly ................. B-36

B-6 B-8

Section E

:

(-011 thru -016) ....................

(-020 thru -022)

:................... E-3

D-4 D-5

E-2

Symbols

Go To Table Of Contents

Caution

Indicates a potentially hazardous situation which could result in injury if not avoided.

Equipment Alert

Indicates a potentially hazardous situation which could result in equipment damage if not avoided.

Note

Amplifies a procedure, practice, or condition.

Indicates that the component the check mark appears beside should be tested before replacing it. In Section A, test the components in the order indicated. (ex.

1st

33

3

33

then,

33

3

33

Refer to Section B for component testing procedures.

2nd

)

33

3

33

Ordering Parts

General Information

Model / Serial Number Location

R

Serial Number

(all models)

Model & Serial Number

The following information is required when ordering parts:

• Serial number & model number

• Part number for desired part.

[Refer to Section E: Exploded Views / Parts Lists]

Non-warranty parts orders may be faxed to Midmark using the Fax Order Form in the back of this manual.

For warranty parts orders, call Midmark's Technical Service Department with the required information.

Hours: 8:00 am until 5:00 pm EST [Monday - Friday] Phone: 1-(800)-Midmark

General Information

M7 (-011 thru -016)

Location: bottom of unit

M7 (-020 thru -022)

Location: back of unit

i

General Information

Go To Table Of Contents

Weights, Dimensions, Electrical Specifications

ATTENTION

A separate (dedicated) electrical circuit is recommended for all models. Do not connect to a circuit with other devices, unless the circuit is rated for the additional load.

R

A

M7 (-011 thru -016)

Dimensions

Height Width Depth

Chamber Size: ..................................... Diameter: 7.5 in. (19 cm)

Depth: 14.25 in. (36.2 cm)

Shipping Carton:

(Length x Width x Height) ..................

(61 cm x 40.6 cm x 40.6 cm)

Weight:

Shipping Weight ................................. 39 lbs (17.7 kg)

w/reservoir empty .............................. 30 lbs (13.6 kg)

w/reservoir full ................................... 41.8 lbs (19 kg)

Reservoir Capacity: ............................ Approx. 1.3 gallon (4.9 liters)

at FULL mark

Pressure Relief Valve:

opens at approximately: ....................

Electrical Requirements: ....................

Compliance Chart]

Power Consumption:

100 VAC models ................................

115 VAC models ................................

230 VAC models ................................

[Refer to illustration]:

(A) ...........................................

(B) ............................................

(C) ...........................................

12.8 in. (32.5 cm)

13.5 in. (34.3 cm)

18.1 in. (46 cm)

24 in. x 16 in. x 16 in.

34 psi (234 kPa)

[See Model Identification /

1150 watts, 12 amps @ 100 VAC 1150 watts, 10 amps @ 120 VAC 1150 watts, 5 amps @ 240 VAC

B

C

M7 (-020 thru -022)

Dimensions

Height Width Depth

Chamber Size: ..................................... Diameter: 7.5 in. (19 cm)

Depth: 14.25 in. (36.2 cm)

Shipping Carton:

(Length x Width x Height) ..................

(61 cm x 40.6 cm x 40.6 cm)

Weight:

Shipping Weight ................................. 39 lbs (17.7 kg)

w/reservoir empty .............................. 30 lbs (13.6 kg)

w/reservoir full ................................... 41.8 lbs (19 kg)

Reservoir Capacity: ............................ Approx. 1.3 gallon (4.9 liters)

at FULL mark

Pressure Relief Valve:

opens at approximately: ....................

Electrical Requirements: ....................

Compliance Chart]

Power Consumption:

115 VAC models ................................

230 VAC models ................................

[Refer to illustration]:

(A) ...........................................

(B) ............................................

(C) ...........................................

13 in. (33 cm) 14 in. (35.6 cm) 19 in. (48.3 cm)

24 in. x 16 in. x 16 in.

34 psi (234 kPa)

[See Model Identification /

1300 watts, 10 amps @ 115 VAC 1300 watts, 5 amps @ 230 VAC

ii

Rev.12/04

Fuse

(back of unit)

115 VAC models ................................

230 VAC models ................................

:

12 amp, 250 V, Fast-Acting, 1/4" x 1-1/4" 8 amp, 250 V, Fast-Acting, 5 x 20 mm

Model Identification / Compliance Chart

Go To Table Of Contents

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General Information

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310-7M

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iii

General Information

Go To Table Of Contents

Special Tools

This table lists all special tools needed to diagnose and repair the sterilizer.

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Warranty Information

SCOPE OF WARRANTY

Midmark Corporation (“Midmark”) warrants to the original purchaser its new Alternate Care products and components (except for components not warranted under “Exclusions”) manufactured by Midmark to be free from defects in material and workmanship under normal use and service. Midmark’s obligation under this warranty is limited to the repair or replacement, at Midmark’s option, of the parts or the products the defects of which are reported to Midmark within the applicable warranty period and which, upon examination by Midmark, prove to be defective.

APPLICABLE WARRANTY PERIOD

The applicable warranty period, measured from the date of delivery to the original user, shall be one (1) year for all warranted products and components.

EXCLUSIONS

This warranty does not cover and Midmark shall not be liable for the following: (1) repairs and replacements because of misuse, abuse, negligence, alteration, accident, freight damage, or tampering; (2) products which are not installed, used, and properly cleaned as required in the Midmark “Installation” and or “Installation / Operation Manual for this applicable product. (3) products considered to be of a consumable nature; (4) accessories or parts not manufactured by Midmark; (5) charges by anyone for adjustments, repairs, replacement parts, installation, or other work performed upon or in connection with such products which is not expressly authorized in writing in advance by Midmark.

EXCLUSIVE REMEDY

Midmark’s only obligation under this warranty is the repair or replacement of defective parts. Midmark shall not be liable for any direct, special, indirect, incidental, exemplary, or consequen tial damages or delay, including, but not limited to, damages for loss of profits or loss of use.

NO AUTHORIZATION

No person or firm is authorized to create for Midmark any other obligation or liability in connection with the products.

ADDITIONAL INFORMATION

Failure to follow the guidelines listed below will void the warranty and/or render the table unsafe for use.

• If a malfunction is detected, do not use the table

until necessary repairs are made.

• Do not attempt to disassemble table, replace

components, or perform adjustments unless you are a Midmark authorized service technician.

• Do not use another manufacturer's parts to replace

malfunctioning components. Use only Midmark replacement parts

THIS WARRANTY IS MIDMARK’S ONLY WARRANTY AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED. MIDMARK MAKES NO IMPLIED WARRANTIES OF ANY KIND INCLUDING ANY WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. THIS WARRANTY IS LIMITED TO THE REPAIR OR REPLACEMENT OF DEFECTIVE PARTS.

SF-1487 REV. A1

iv

Operation & Troubleshooting

Go To Table Of Contents

Operation & Troubleshooting

Mode Page

Electrical System:

M7 (-011 thru -016) ...........................

M7 (-020 thru -022) ...........................

Filling the Chamber .............................. A-8

Heat Up / Sterilization ........................... A-14

Venting the Chamber ............................ A-20

A-2

A-4

Models:

Serial Numbers:

Section A

A-1

Operation & Troubleshooting

Go To Table Of Contents

Back

The illustration shows all of the electrical components of the sterilzer.

Refer to the following page for a detailed description of current flow.

Overheat

Thermostat

(Manual-Reset)

Com.

Overheat

Thermostat

(Auto-Reset)

Troubleshooting

[Electrical System]

Problem: Page

Heating element does not turn ON:

- Heater light is OFF ...............................

- Heater light is ON

.............................

Sterilizer shuts down before

timer setting expires .........................

Timer buzzer does not function ...........

A-6

A-7

A-17

A-19

Electrical System

A-2

Heating Element

Com.

Temperature

Regulator

Relay

Serial Numbers:

Heater

Light

Models:

Timer

Buzzer

Timer

MA670901i

M7 (-011 thru -016)

all

Operation & Troubleshooting

Go To Table Of Contents

Electrical System - [M7 (-011 thru -016)]

With the power cord properly connected...

Overheat Thermostats

Current

closed)

If either thermostat opens from the timer until the thermostat is reset or replaced.

NOTE

The Manual-Reset Thermostat contacts open at approximately 285°F (140°C). To reset, allow unit to cool, then press RESET button on front of unit.

The Auto-Reset Thermostat contacts open at approximately 295°F (146°C). This thermostat automatically resets when the unit cools to approx. 265°F (129°C).

Timer

Current is supplied to the timer thru the two overheat thermostats.

When the timer is turned ON...

Timer

The timer motor and the temperature regulator relay. The timer motor runs, and begins to count down the time it was set for.

(The contacts to the timer buzzer remain open).

(115 / 230 VAC)

overheat thermostats. This current supplies power to the timer.

(normally open)

continuously flows thru the two

(overheat or malfunction),

timer contacts close, and voltage is supplied to the

(normally

voltage is removed

When the timer is turned ON (continued)...

Heater Light & Heating Element

When the contacts of the temperature regulator relay are closed, current is supplied to the heater light and the heating element.

As the relay contacts open and close, the heating element cycles ON / OFF. This continues until the timer setting expires.

The heater light is illuminated whenever the heating element is ON.

When the timer setting expires...

Timer & Timer Buzzer

The contacts to the temperature regulator relay open, stopping the current flow to the heater light & heating element.

The contacts to the timer buzzer close and current flows to the timer buzzer. When voltage is applied, the buzzer emits an audible signal.

The contacts to the timer motor remain closed for one minute. After one minute the contacts to the timer motor & the timer buzzer open, stopping the current flow to these two components.

Temperature Regulator Relay

Current is supplied to the temperature regulator relay thru the timer. If the chamber temperature is lower than the temperature knob setting*, the relay contacts are closed. When these contacts are closed, current flows thru the relay to the heating element and the heater light.

The diaphragm cup of the relay expands as the temperature & pressure inside the chamber increase. When the chamber temperature reaches the temperature knob setting, the relay contacts open, and voltage is removed from the heating element & heater light.

[* The minimum temperature knob setting is approx. 220°F (104°C)]

Models:

Serial Numbers:

M7 (-011 thru -016)

all

Electrical System

A-3

Operation & Troubleshooting

Go To Table Of Contents

Electrical System - [M7 (-020 thru -022)]

The illustration shows all of the electrical components of the sterilzer.

Refer to the following page for a detailed description of current flow.

Fuse

Overheat

Thermostat

(Manual-Reset)

Troubleshooting

[Electrical System]

Problem: Page

When Fill/Vent Switch is pressed:

- Chamber does not FILL .......................

- Chamber does not VENT .....................

Heating element does not turn ON:

- Heater light is OFF ...............................

- Heater light is ON

.............................

Sterilizer shuts down before

timer setting expires .........................

Timer buzzer does not function ...........

A-11

A-23

A-6

A-7

A-17

A-19

Com.

Heating Element

Com.

Temperature

Regulator

Relay

Heater

Light

Timer

Buzzer

Com.

Overheat

Thermostat

(Auto-Reset)

Timer

Fill / Vent

Switch

Fill / Vent

Valve

MA670900i

Electrical System

A-4

Models:

Serial Numbers:

M7 (-020 thru -022)

all

Operation & Troubleshooting

Go To Table Of Contents

Electrical System - [M7 (-020 thru -022)]

With the power cord properly connected...

Fuse

Current back of the unit. This current supplies power to the fill / vent switch and the overheat thermostats.

Fill / Vent Switch

Current is supplied to the fill / vent switch thru the fuse.

Overheat Thermostats & Timer

Current is supplied to the two overheat thermostats thru the fuse. Current continuously flows thru the thermostats to the timer.

If either thermostat opens from the timer until the thermostat is reset or replaced.

NOTE

The Manual-Reset Thermostat contacts open at approximately 285°F (140°C). To reset, allow unit to cool, then press RESET button on front of unit.

The Auto-Reset Thermostat contacts open at approximately 295°F (146°C). This thermostat automatically resets when the unit cools to approx. 265°F (129°C).

(115 / 230 VAC)

continuously flows thru the fuse located in the

(overheat or malfunction),

voltage is removed

When the timer is turned ON (continued)...

Temperature Regulator Relay

Current is supplied to the temperature regulator relay thru the timer. If the chamber temperature is lower than the temperature knob setting*, the relay contacts are closed. When these contacts are closed, current flows thru the relay to the heating element and the heater light.

[* The minimum temperature knob setting is approx. 220°F (104°C)]

The diaphragm cup of the relay expands as the temperature & pressure inside the chamber increase. When the chamber temperature reaches the temperature knob setting, the relay contacts open, and voltage is removed from the heating element & heater light.

Heater Light & Heating Element

When the contacts of the temperature regulator relay are closed, current is supplied to the heater light and the heating element. As the relay contacts open and close, the heating element cycles ON / OFF. This continues until the timer setting expires. The heater light is illuminated whenever the heating element is ON.

When the timer setting expires...

Timer & Timer Buzzer

The contacts to the temperature regulator relay open, stopping the current flow to the heater light & heating element.

When filling the chamber (pressing the fill/vent switch)...

Fill / Vent Switch

The contacts of the switch are closed, current is supplied to the fill / vent valve.

Fill / Vent Valve

When current is applied to the When the valve is open, water flows into the chamber.

When the Timer is turned ON...

Timer

The

(normally open)

timer motor and the temperature regulator relay. The timer motor runs, and begins to count down the time it was set for.

(The contacts to the timer buzzer remain open).

Models:

Serial Numbers:

(normally open)

timer contacts close, and voltage is supplied to the

switch close. When the contacts of the

(normally closed)

valve, the valve opens.

M7 (-020 thru -022)

all

The contacts to the timer buzzer close and current flows to the timer buzzer. When voltage is applied, the buzzer emits an audible signal.

The contacts to the timer motor remain closed for one minute. After one minute the contacts to the timer motor & the timer buzzer open, stopping the current flow to these two components.

When pressing the Fill / Vent Switch (to VENT the chamber)...

Fill / Vent Switch

The contacts of the switch are closed, current is supplied to the fill / vent valve.

(normally open)

switch close. When the contacts of the

Fill / Vent Valve

When current is applied to the When the valve is open, steam is released thru the condensing coil & the water is returned to the reservoir .

(normally closed)

Electrical System

valve, the valve opens.

A-5

Operation & Troubleshooting

Go To Table Of Contents

Refer To: Page

Operation & Troubleshooting ................ A-1

Component Testing / Repair ................. B-1

Access Procedures .............................. C-1

Wiring Diagrams ................................... D-1

Exploded Views / Part Numbers ........... E-1

4th

Loose / Damaged Wire Connections

Check all wiring connections. (Power cord, overheat thermostats, etc.)

33

3

33

Problem: Heating element does not turn ON.

M7 (-020 thru -022) only

Fuse

[Heater light is OFF]

3rd

33

3

33

Timer

Press RESET button

Allow unit to cool for 15-20 minutes before pressing RESET button.

1st

7th

33

3

33

R

33

3

33

Temperature Regulator Assy.

Overheat Thermostats

5th

6th

33

3

33

Check supply voltage

(A dedicated circuit is recommended)

33

3

33

MA670800i

2nd

33

3

33

Electrical System

A-6

Models:

Serial Numbers:

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

Problem: Heating element does not turn ON.

Go To Table Of Contents

[Heater light is ON]

Operation & Troubleshooting

Refer To: Page

Operation & Troubleshooting ................ A-1

Component Testing / Repair ................. B-1

Access Procedures .............................. C-1

Wiring Diagrams ................................... D-1

Exploded Views / Part Numbers ........... E-1

Models:

Serial Numbers:

Heating

1st

33

3

33

Element

M7 (-011 thru -016)

all

R

M7 (-020 thru -022)

all

MA672300i

Electrical System

A-7

Operation & Troubleshooting

Go To Table Of Contents

Filling the Chamber

The illustrations show the water flow when filling the chamber.

Refer to the following page for a detailed description of this process.

M7 (-011 thru -016)

Reservoir

Troubleshooting

[Filling the Chamber]

Problem: Page

Chamber does not fill:

- M7 (-011 thru -016) ..............................

- M7 (-020 thru -022) ..............................

A-10

A-11

Water continuously flows into chamber:

- M7 (-011 thru -016) ..............................

- M7 (-020 thru -022)

...........................

A-12

A-13

M7 (-020 thru -022)

Filling the Chamber

A-8

Fill / Vent Valve

(open)

= Water

Models:

Serial Numbers:

M7 (-011 thru -016)

all

Filter Screen

Fill / Vent Valve

(open)

M7 (-020 thru -022)

all

Reservoir

MA671500i

Filling the Chamber

Go To Table Of Contents

Operation & Troubleshooting

M7 (-011 thru -016)

When the Fill / Vent Lever is pressed and held...

Fill Vent Valve

The

(normally closed - manual)

from the reservoir flows thru the fill / vent valve into the chamber.

When the Fill / Vent Lever is released...

Fill / Vent Valve

The valve closes, and stops the flow of water into the chamber.

R

valve opens. When the valve is open, water

M7 (-020 thru -022)

When the Fill / Vent Switch is pressed and held...

Fill / Vent Switch & Valve

Current voltage is applied, the is open, water from the reservoir flows into the chamber thru the valve and filter screen.

When the Fill / Vent Switch is released...

Fill / Vent Switch & Valve

The fill/vent switch opens, stopping the current flow to the fill/vent valve. When voltage is removed, the valve closes. When the valve closes, water stops flowing into the chamber.

(line voltage)

flows thru the fill/vent switch to the fill/vent valve. When

(normally closed)

R

fill / vent valve opens. When the valve

Fill / Vent

Lever

Models:

Serial Numbers:

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

Fill / Vent

Switch

MA512903i

Filling the Chamber

A-9

Operation & Troubleshooting

Go To Table Of Contents

Refer To: Page

Operation & Troubleshooting ................ A-1

Component Testing / Repair ................. B-1

Access Procedures .............................. C-1

Wiring Diagrams ................................... D-1

Exploded Views / Part Numbers ........... E-1

R

Problem: Chamber does not fill.

Low water in reservoir?

Add distilled water if necessary.

1st

33

3

33

Filling the Chamber

A-10

Models:

Serial Numbers:

M7 (-011 thru -016)

all

Fill / Vent Valve & Tubing

Clean / adjust / replace as necessary.

MA672400i

2nd

33

3

33

Problem: Chamber does not fill.

Go To Table Of Contents

Operation & Troubleshooting

Refer To: Page

Operation & Troubleshooting ................ A-1

Component Testing / Repair ................. B-1

Access Procedures .............................. C-1

Wiring Diagrams ................................... D-1

Exploded Views / Part Numbers ........... E-1

Filter Screen

Clean / replace as necessary.

2nd

Fill / Vent Switch

33

3

33

R

6th

33

3

33

Fuse

Low water in reservoir?

Add distilled water if necessary.

4th

33

3

33

1st

33

3

33

Check supply voltage

(A dedicated circuit is recommended)

3rd

33

3

33

Models:

Serial Numbers:

M7 (-020 thru -022)

all

Fill / Vent Valve & Tubing

Clean / adjust / replace as necessary.

Filling the Chamber

5th

33

3

33

A-11

Operation & Troubleshooting

Go To Table Of Contents

Refer To: Page

Operation & Troubleshooting ................ A-1

Component Testing / Repair ................. B-1

Access Procedures .............................. C-1

Wiring Diagrams ................................... D-1

Exploded Views / Part Numbers ........... E-1

R

Problem: Water continuously flows into chamber.

Filling the Chamber

A-12

Models:

Serial Numbers:

M7 (-011 thru -016)

all

Fill / Vent Valve & Tubing

Clean / adjust / replace as necessary.

MA672400i

1st

33

3

33

Problem: Water continuously flows into chamber.

Go To Table Of Contents

R

Operation & Troubleshooting

Refer To: Page

Operation & Troubleshooting ................ A-1

Component Testing / Repair ................. B-1

Access Procedures .............................. C-1

Wiring Diagrams ................................... D-1

Exploded Views / Part Numbers ........... E-1

Models:

Serial Numbers:

Fill / Vent Switch

M7 (-020 thru -022)

all

2nd

33

3

33

Fill / Vent Valve & Tubing

Clean / adjust / replace as necessary.

Filling the Chamber

1st

33

3

33

A-13

Operation & Troubleshooting

Go To Table Of Contents

Heat Up / Sterilization

The illustrations show the water / steam flow during heat up & sterilization.

Refer to the following page for a detailed description of this process.

Heat-Up

Bellows

(open)

Temperature

Regulator Relay

(closed)

Troubleshooting

[Heat-Up / Sterilization]

Problem: Page

Heating element does not turn ON:

- Heater light is OFF ...............................

- Heater light is ON

.............................

A-6 A-7

Heating element turns ON, but does not

reach required temperature ..............

A-16

Sterilizer shuts down before

timer setting expires .........................

A-17

Biological test strips indicate items

are not sterile ...................................

Timer buzzer does not function ...........

A-18

A-19

Sterilization

Pressure Relief Valve

(closed)

= Water

= Heated Water

= Steam

Heat-Up / Sterilization

A-14

Fill / Vent Valve

(closed)

Note: Electronic valve is shown.

Manual valve is also closed.

Models:

Serial Numbers:

M7 (-011 thru -016)

all

Temperature

Regulator Relay

(closed / open)

Fill / Vent Valve

Note: Electronic valve is shown.

Manual valve is also closed.

M7 (-020 thru -022)

all

Bellows

(closed)

MA672000i

(closed)

Heat-Up / Sterilization

Go To Table Of Contents

Operation & Troubleshooting

When the timer is turned ON...

Timer

The

(normally open)

timer motor and the temperature regulator relay. The timer motor runs, and begins to count down the time it was set for.

timer contacts close, and voltage is supplied to the

(The contacts to the timer buzzer remain open).

Temper

Current is supplied to the temperature regulator relay thru the timer. If the chamber temperature is lower than the temperature knob setting*, the relay contacts are closed. When these contacts are closed, current flows thru the relay to the heating element and the heater light.

ature Regulator Relay

[* The minimum temperature knob setting is approx. 220°F (104°C)]

The diaphragm cup of the relay expands as the temperature & pressure inside the chamber increase. When the chamber temperature reaches the temperature knob setting, the relay contacts open, and voltage is removed from the heating element & heater light.

Heater Light & Heating Element

When the contacts of the temperature regulator relay are closed, current is supplied to the heater light and the heating element.

As the relay contacts open and close, the heating element cycles ON / OFF. This continues until the timer setting expires.

When the timer setting expires...

Timer &

The contacts to the temperature regulator relay open, stopping the current flow to the heater light & heating element.

The contacts to the timer buzzer close and current flows to the timer buzzer. When voltage is applied, the buzzer emits an audible signal.

The contacts to the timer motor remain closed for one minute. After one minute the contacts to the timer motor & the timer buzzer open, stopping the current flow to these two components.

Timer Buzzer

R

The heater light is illuminated whenever the heating element is ON.

Bello

ws & Pressure Relief Valve

Heat-Up: As the water in the chamber begins to boil, air is forced out of the chamber. This air passes thru the bellows into the reservoir.

Sterilization: When pure steam begins to flow thru the bellows, the bellows closes allowing pressure to build in the chamber. If the pressure in the chamber exceeds 34 psi (234 kPa), the pressure relief valve opens to prevent unsafe conditions.

Models:

Serial Numbers:

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

Temperature Knob

Timer Knob

MA672100i

Heat-Up / Sterilization

A-15

Operation & Troubleshooting

Go To Table Of Contents

Refer To: Page

Operation & Troubleshooting ................ A-1

Component Testing / Repair ................. B-1

Access Procedures .............................. C-1

Wiring Diagrams ................................... D-1

Exploded Views / Part Numbers ........... E-1

Refer to Section B for checkpoints.

1st

33

3Check for pressure leaks.

33

Problem: Heating element turns ON, but does

not reach required temperature. [Heater light is ON]

Heating Element

Heat-Up / Sterilization

A-16

3rd

33

3

33

Models:

Serial Numbers:

R

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

MA672700i

Temperature Regulator Assy.

2nd

33

3

33

Problem: Sterilizer shuts down before timer setting expires.

Go To Table Of Contents

Check for pressure leaks.

Refer to Section B for checkpoints.

1st

Operation & Troubleshooting

Refer To: Page

Operation & Troubleshooting ................ A-1

Component Testing / Repair ................. B-1

Access Procedures .............................. C-1

Wiring Diagrams ................................... D-1

Exploded Views / Part Numbers ........... E-1

33

3

33

Timer

Press RESET button

Allow unit to cool for 15-20 minutes before pressing RESET button.

2nd

33

3

33

5th

R

33

3

33

Temperature Regulator Assy.

4th

33

3

33

Overheat Thermostats

MA672800i

3rd

33

3

33

Models:

Serial Numbers:

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

Heat-Up / Sterilization

A-17

Operation & Troubleshooting

Go To Table Of Contents

Refer To: Page

Operation & Troubleshooting ................ A-1

Component Testing / Repair ................. B-1

Access Procedures .............................. C-1

Wiring Diagrams ................................... D-1

Exploded Views / Part Numbers ........... E-1

Problem: Biological test strips indicate items are not sterile.

Type / condition of indicator strips

This unit requires test strips rated for:

Gravity Displacement Steam Sterilizers

Test strips must be stored in a cool, dry location. Failure to do so will result in faulty readings.

(Follow all instructions provided with test strips)

1st

33

3

33

Is the sterlizer overloaded?

Large loads or heavy linen packs may prevent strips from changing.

Are the correct trays being used?

Some trays may prevent proper air flow. Be sure trays are designed for this sterilizer.

3rd

2nd

33

3

33

3

33

4th

5th

33

3

33

3

33

Check for pressure leaks.

Refer to Section B for checkpoints.

R

Temperature Regulator Assy.

MA672900i

Heat-Up / Sterilization

A-18

Models:

Serial Numbers:

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

Problem: Timer buzzer does not function.

Go To Table Of Contents

Operation & Troubleshooting

Refer To: Page

Operation & Troubleshooting ................ A-1

Component Testing / Repair ................. B-1

Access Procedures .............................. C-1

Wiring Diagrams ................................... D-1

Exploded Views / Part Numbers ........... E-1

Timer Buzzer

R

1st

33

3

33

MA672900i

Models:

Serial Numbers:

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

Heat-Up / Sterilization

A-19

Operation & Troubleshooting

Go To Table Of Contents

Venting the Chamber

The illustrations show the steam / water flow when venting the chamber.

Refer to the following page for a detailed description of this process.

M7 (-011 thru -016)

Condensing Coil

Troubleshooting

[Venting the Chamber]

Problem: Page

Chamber will not vent:

- M7 (-011 thru -016) ..............................

- M7 (-020 thru -022) ..............................

M7 (-020 thru -022)

A-22

A-23

Venting the Chamber

A-20

= Water

= Steam

Fill / Vent Valve

(open)

Models:

Serial Numbers:

M7 (-011 thru -016)

all

Fill / Vent Valve

(open)

M7 (-020 thru -022)

all

Filter Screen

Condensing Coil

MA672200i

Venting the Chamber

Go To Table Of Contents

Operation & Troubleshooting

Attention

The door handle

must be moved to the VENT position

before pressing the Fill / Vent Lever or Switch.

M7 (-011 thru -016)

When the Fill / Vent Lever is pressed and held...

Fill / Vent Valve

The

(normally closed - manual)

and steam back into the reservoir thru the valve and the condensing coil. When all of the pressure has been vented, the door will "pop".

Note: Release the lever when the door "pops".

If the lever is held too long, the chamber will begin to fill.

When the Fill / Vent Lever is released...

Fill / Vent Valve

The valve closes.

valve opens. Pressure forces water

M7 (-020 thru -022)

When the Fill / Vent Switch is pressed and held...

Fill / Vent Switch & Valve

Current voltage is applied, the water and steam back into the reservoir thru the valve and the condensing coil. When all of the pressure has been vented, the door will "pop".

Note: Release the lever when the door "pops".

When the Fill / Vent Switch is released...

Fill / Vent Switch & Valve

The fill/vent switch opens, stopping the current flow to the fill/vent valve. When voltage is removed, the valve closes.

(line voltage)

flows thru the fill/vent switch to the fill/vent valve. When

(normally closed)

fill / vent valve opens. Pressure forces

If the lever is held too long, the chamber will begin to fill.

Fill / Vent

Lever

Models:

Serial Numbers:

R

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

Fill / Vent

Switch

R

MA512903i

Venting the Chamber

A-21

Operation & Troubleshooting

Go To Table Of Contents

Refer To: Page

Operation & Troubleshooting ................ A-1

Component Testing / Repair ................. B-1

Access Procedures .............................. C-1

Wiring Diagrams ................................... D-1

Exploded Views / Part Numbers ........... E-1

R

Problem: Chamber will not vent.

Venting the Chamber

A-22

Models:

Serial Numbers:

M7 (-011 thru -016)

all

Fill / Vent Valve & Tubing

Clean / adjust / replace as necessary.

MA672400i

1st

33

3

33

Problem: Chamber will not vent.

Go To Table Of Contents

Operation & Troubleshooting

Refer To: Page

Operation & Troubleshooting ................ A-1

Component Testing / Repair ................. B-1

Access Procedures .............................. C-1

Wiring Diagrams ................................... D-1

Exploded Views / Part Numbers ........... E-1

Filter Screen

Clean / replace as necessary.

Models:

Serial Numbers:

1st

33

3

33

Fill / Vent Switch

M7 (-020 thru -022)

all

R

3rd

33

3

33

Fill / Vent Valve & Tubing

Clean / adjust / replace as necessary.

Venting the Chamber

2nd

33

3

33

A-23

Go To Table Of Contents

Component Testing & Repair

Go To Table Of Contents

Testing & Repair

Component / Procedure Page

Checking For Pressure Leaks .............. B-2

Fuse

[M7 (-020 thru -022) only] ............

Bellows ............................................... B-4

Fill / Vent Valve:

Manual ..............................................

Electronic ..........................................

Temperature Regulator Assy. ............... B-12

Heating Element ................................... B-18

Overheat Thermostats .......................... B-22

Pressure Relief Valve ........................... B-25

Timer Assembly.................................... B-26

Timer Buzzer ........................................B-30

Temperature Gauge ............................. B-31

Door Assembly ..................................... B-32

Reservoir Tank ..................................... B-34

Chamber Assembly .............................. B-36

B-3

B-6

B-8

Models:

Serial Numbers:

Section B

B-1

Component Testing & Repair

Go To Table Of Contents

Checking for Pressure Leaks

This illustration shows the areas to check for pressure leaks.

Components Page

Bellows ............................................... B-4

Fill / Vent Valve:

Manual ..............................................

Electronic ..........................................

Pressure Relief Valve ........................... B-25

Door Assembly ..................................... B-32

B-6

B-8

Water leaking from fitting(s)?

Tighten / replace fittings if necessary.

R

Water leaking from door?

If YES, replace door gasket.

Steam from pressure relief valve?

If YES, replace the pressure relief valve.

Steam from bellows tubing?

If YES, replace the bellows.

Note: The bellows should close at approx. 215°F

(101°C). Periodic "hissing' or "spitting" is normal.

Bubbles from condensing coil?

If YES, clean or replace the fill / vent valve.

MA673100i

B-2

Checking for

Pressure Leaks

Models:

Serial Numbers:

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

Fuse

Go To Table Of Contents

Location

Fuse

Holder

Component Testing & Repair

Fuse Test

Acceptable Range

Fuses Page

Location ............................................... B-3

Location ............................................... B-2

Fuse Test ............................................. B-3

Fuse Test ............................................. B-2

Wiring Diagrams ................................... D-1

Part Numbers ....................................... E-14.1

Fuse Rating ...............................6.3A, 250V

Type T, 5 x 20mm

Part Number ............................ 015-0346-20

Fuse Test

Step 1: Place meter probes on ends of fuse.

[Set meter to 200 ohms (

Ω)]

R

Fuse Ratings:

115V models ......

230V models ......

Models:

Serial Numbers:

12 amp, 250 V, Fast-Acting, 1/4" x 1-1/4" 8 amp, 250 V, Fast-Acting, 5mm x 20mm

M7 (-020 thru -022)

all

less than 5

ΩΩ

Ω

ΩΩ

FuseTest

If reading is OL...

Replace fuse.

If reading is within acceptable range...

Fuse is OK.

Fuse

B-3

Component Testing & Repair

Go To Table Of Contents

Bellows

Location & Function

The arrow indicates the direction of flow toward the reservoir.

The bellows must be oriented correctly to ensure proper operation.

Bellows Page

Location & Function .............................. B-4

Testing - refer to:

Checking for Pressure Leaks ............

Replacement ........................................ B-5

Exploded View / Part Numbers ............. E-11

As the water in the chamber begins to boil...

Air & steam are forced out of the chamber, thru the open bellows, and back into the reservoir.

B-2

B-4

Bellows

R

When pure steam begins flowing thru bellows...

The bellows closes allowing pressure to build in the chamber.

[Note: The bellows will periodically "hiss" or "spit", this is normal.

MA673301i

Models:

Serial Numbers:

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

Bellows - continued

Go To Table Of Contents

Replacement

Component Testing & Repair

Refer to: Page

Cover Removal ..................................... C-2

NOTE:

The arrow on the bellows indicates the direction of flow toward the reservoir. The bellows must be oriented correctly to ensure proper operation.

Models:

Serial Numbers:

Removal

Step 1: Loosen two compression nuts.

Remove bellows.

Installation

(See NOTE for proper orientation of bellows)

Step 1: Install bellows.

Tighten compression nuts.

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

Arrow must point

toward the reservoir

as shown

Bellows

MA673401i

B-5

Component Testing & Repair

Go To Table Of Contents

Fill / Vent Valve (manual)

Location & Function

Early Models Later Models

R

Fill / Vent Valve Page

Location & Function .............................. B-6

Testing - refer to:

Checking for Pressure Leaks ............

Removal / Installation / Adjustment ...... B-7

Exploded View / Part Numbers ............. E-9

B-2

When the fill / vent lever is pressed (no pressure in chamber)...

The

(normally closed)

Water from the reservoir flows thru the open valve into the chamber. The valve closes when the lever is released.

fill / vent valve opens.

When the fill / vent lever is pressed (chamber is pressurized)...

The

(normally closed)

Water and steam from the chamber are forced thru the open valve back into the reservoir. When all of the pressure has been released, the door will "pop". The valve closes when the lever is released.

fill / vent valve opens.

B-6

Fill / Vent Lever

Fill / Vent Valve

Models:

Serial Numbers:

MA673500i

M7 (-011 thru -016)

all

Fill / Vent Valve (manual) - continued

Go To Table Of Contents

Removal / Installation / Adjustment

Component Testing & Repair

Refer to: Page

Cover Removal ..................................... C-2

Draining / Filling the Reservoir ............. C-4

Removal

Step 1: Drain water from reservoir.

Removal

Step 2: Loosen two compression nuts.

Lever Bracket

Removal

Step 3: Disengage lever bracket from lever.

Remove valve.

Lever

Installation

Step 2: Align tubing with valve.

Tighten two compression nuts. Adjust lever bracket. (See

Installation

Step 1: Engage lever bracket with lever.

Press valve into mtg. brackets.

Adjustment

)

DISTANCE "A"

Lever Bracket

Adjustment

Adjust lever bracket so that Distance "A" is approx. 1/4" (0.63 cm). To secure position, tighten nut against lever bracket.

Models:

Serial Numbers:

M7 (-011 thru -016)

all

MA673600i

Fill / Vent Valve

B-7

Component Testing & Repair

Go To Table Of Contents

Fill / Vent Valve (electronic)

Location & Function

Fill / Vent Valve Page

Location & Function .............................. B-8

Testing - refer to:

Checking for Pressure Leaks ............

Electrical Test ....................................

Replacement ........................................ B-10

Disassembly / Cleaning ........................B-11

Wiring Diagrams ................................... D-1

Exploded View / Part Numbers ............. E-9.3

When the fill / vent switch is pressed (no pressure in chamber)...

Current When voltage is applied, the Water from the reservoir flows thru the open valve into the chamber. The valve closes when the switch is released.

(line voltage)

flows thru the fill/vent switch to the fill / vent valve.

(normally closed)

fill/vent valve opens.

B-2

B-9

Fill / Vent Switch

B-8

R

Fill / Vent Valve

MA673800i

Models:

Serial Numbers:

When the fill / vent lever is pressed (chamber is pressurized)...

Current When voltage is applied, the Water and steam from the chamber are forced thru the open valve back into the reservoir. When all of the pressure has been released, the door will "pop". The valve closes when the lever is released.

(line voltage)

M7 (-020 thru -022)

all

flows thru the fill/vent switch to the fill/vent valve.

(normally closed)

fill / vent valve opens.

Fill / Vent Valve (electronic) - continued

Go To Table Of Contents

Electrical Test

Step 1: Disconnect wires from valve terminals.

Electrical Test

Step 2: Place meter probes on terminals.

[Set meter to M ohms (

Component Testing & Repair

Refer to: Page

Cover Removal ..................................... C-2

Ω)]

Acceptable Range

115 VAC models: ........ 3.24 to 3.96

230 VAC models: ....... 3.24 to 3.96

Models:

Serial Numbers:

M7 (-020 thru -022)

all

Electrical Test

If reading is out of acceptable range...

Replace valve.

If reading is within acceptable range...

Electrical component of valve is OK.

Fill / Vent Valve

B-9

Component Testing & Repair

Go To Table Of Contents

Fill / Vent Valve (electronic) - continued

Replacement

Removal

Step 1: Tag and disconnect wires

from valve terminals.

Refer to: Page

Cover Removal ..................................... C-2

Installation

Step 3: Connect compression fittings.

Installation

Step 4: Connect wires to valve terminals.

Removal

Step 2: Disconnect compression fittings.

Installation

Step 1: Install valve onto bracket.

Locate "IN" port and direct flow into the reservoir as shown.

Removal

Step 4: Remove valve from bracket.

Installation

Step 2: Secure bracket / valve to base plate.

B-10

Fill / Vent Valve

Rev. 7/07

Models:

Serial Numbers:

Removal

Step 3: Remove bracket / valve from base plate.

MA677901i

M7 (-020 thru -022)

all

Fill / Vent Valve (electronic) - continued

Go To Table Of Contents

Disassembly / Cleaning

Step 1:

Remove nut. Disassemble valve.

Component Testing & Repair

Refer to: Page

Valve Removal ..................................... B-10

Models:

Serial Numbers:

Disassembly / Cleaning

Step 2:

M7 (-020 thru -022)

Remove any debris. Inspect components for damage.

all

Fill / Vent Valve

B-11

Component Testing & Repair

Go To Table Of Contents

Temperature Regulator Assembly

Location & Function

Temperature

Relay

Diaphragm Cup

Flexible Shaft

Temp. Regulator Assy. Page

Location & Function .............................. B-12

Troubleshooting .................................... B-13

Temperature Relay:

Adjustment ........................................

Removal ............................................

Installation .........................................

Diaphragm Cup Replacement .............. B-17

Wiring Diagrams ................................... D-1

Exploded View / Part Numbers ............. E-7

When the Temperature Control knob is adjusted...

The flexible shaft rotates, increasing or decreasing the distance between the relay contacts. This adjusts the point at which the relay contacts will open & close*.

(i.e. temperature)

B-14

B-15

B-16

Temperature Regulator

B-12

Assembly

As the temperature & pressure inside the chamber increase...

The diaphragm cup expands, pushing the relay contacts apart. When the relay contacts are open, the heating element is de-energized.

As the temperature & pressure inside the chamber decrease...

R

MA674200i

Models:

Serial Numbers:

M7 (-011 thru -016)

all

The diaphragm cup contracts, allowing the relay contacts to close. When the relay contacts are closed, the heating element is energized.

M7 (-020 thru -022)

all

Temperature Regulator Assembly - continued

Go To Table Of Contents

Troubleshooting

Sterilizer shuts down before timer setting expires...

Component Testing & Repair

Refer to: Page

Relay Adjustment ................................. B-14

Relay Removal ..................................... B-15

Diaphragm Cup Replacement .............. B-17

Required action: Inspect relay.

(If contacts are corroded or "fused" together - replace relay)

Inspect diaphragm cup.

(If water / steam is leaking from this area, replace diaphragm cup)

Diaphragm Cup

Temperature

Relay

Sterilizer does not reach desired temperature...

Required action: Perform

Replace relay if necessary.

Relay Adjustment.

Models:

Serial Numbers:

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

MA674201i

Temperature Regulator

Assembly

B-13

Component Testing & Repair

Go To Table Of Contents

Temperature Regulator Assembly - continued

Relay Adjustment

R

Relay Adjustment

Step 1: Fill chamber with water.

Close & latch door. Set

Timer

knob to 30 minutes.

Refer to: Page

Cover Removal ..................................... C-2

Relay Adjustment

Step 4: Allow chamber to reach its max.

temperature

[>270°F (132°C)].

Relay Adjustment

Step 5: Adjust screw until temperature gauge

reads slightly above 270°F

(132°C).

Relay Adjustment

Step 2: Turn

Temperature Regulator

B-14

Temperature

Assembly

knob to

max

.

Serial Numbers:

Models:

M7 (-011 thru -016)

all

Relay Adjustment

Step 3: Loosen setscrew 2-3 turns.

Relay Adjustment

Step 6: Adjust setscrew until temperature

gauge reads 270-271°F

M7 (-020 thru -022)

all

(131-132°C).

MA674400i

500

Temperature Regulator Assembly - continued

Go To Table Of Contents

Relay Removal

R

Component Testing & Repair

Refer to: Page

Cover Removal ..................................... C-2

Removal

Step 4: Remove timer buzzer.

Remove relay & spacer.

Removal

Step 3: Disconnect two relay wires.

Models:

Serial Numbers:

(one from heating element & one from timer - not shown)

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

Removal

Step 2: Rotate

flexible shaft unscrews from relay.

Temperature

knob until

Removal

Step 1: Remove setscrew from flexible shaft.

MA674

i

Temperature Regulator

Assembly

B-15

Component Testing & Repair

Go To Table Of Contents

Temperature Regulator Assembly - continued

Relay Installation

R

Refer to: Page

Relay Removal ..................................... B-15

Relay Adjustment ................................. B-14

Installation

Step 1: Install relay & spacer.

Install timer buzzer.

Note: Do not tighten Adjustment Screw.

Fine Adjustment Setscrew should

be flush with bracket.

Adjustment Screw

Fine Adjustment

Setscrew

Installation

Step 2: Connect two relay wires.

(one to heating element & one to timer - not shown)

Temperature Regulator

B-16

Assembly

Installation

(Apply hi-temp lubricant to threads of flexible shaft)

Step 3: Turn the

shaft screws all the way into relay. Rotate knob back 1 1/2 turns, then install

Temperature

(counter-clockwise)

knob until flexible

Shaft Setscrew

Installation

Step 4: Turn the

Models:

Serial Numbers:

until it hits the stop. Hold knob in place, then loosen Rotate knob so that white mark is at 3:00 position, then tighten knob setscrew.

M7 (-011 thru -016)

Temperature

all

knob

M7 (-020 thru -022)

.

counter-clockwise

Knob Setscrew

all

Shaft Setscrew

Knob Setscrew

MA674501i

.

Installation

Step 5: Perform

Relay Adjustment.

Temperature Regulator Assembly - continued

Go To Table Of Contents

Diaphragm Cup Replacement

Removal

Step 1: Remove relay.

Installation

Step 3: Install relay.

Removal

Step 2: Remove nut & lockwasher.

Installation

Step 2: Install lockwasher & nut.

Component Testing & Repair

Refer to: Page

Relay Removal ..................................... B-15

Relay Installation .................................. B-16

Models:

Serial Numbers:

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

Installation

Step 1: Install gasket onto diaphragm cup.

Install diaphragm cup.

Removal

Step 3: Remove diaphragm cup

Remove gasket from diaphragm cup.

Temperature Regulator

Assembly

B-17

Component Testing & Repair

Go To Table Of Contents

Heating Element

Location & Function

Heating Element Page

Location & Function .............................. B-18

Resistance Test .................................... B-19

Replacement ........................................ B-20

Wiring Diagrams ................................... D-1

Exploded View / Part Numbers ............. E-13

When the timer is turned ON...

The timer supplies current to the temperature relay. If the chamber temperature is lower than the temperature knob setting*, the relay contacts are closed. When these contacts are closed, current flows thru the relay to energize the heating element and the heater light.

B-18

Heating Element

Heater Light

R

Models:

Serial Numbers:

M7 (-011 thru -016)

all

When the chamber temperature reaches the temperature knob setting, the relay contacts open, and voltage is removed from the heating element & heater light.

[* The minimum temperature knob setting is approx. 220°F (104°C)]

When the timer is OFF...

Timer contacts to the temperature relay open, stopping the current flow to the heater light & heating element.

MA674800i

M7 (-020 thru -022)

all

Heating Element - continued

Go To Table Of Contents

Resistance Test

Step 1: Disconnect wires from heating element terminals.

Resistance Test

Step 2: Place meter probes on terminals.

[Set meter to 200 ohms (

Ω)]

Component Testing & Repair

Refer to: Page

Cover Removal ..................................... C-2

Acceptable Range

100 VAC models ........ 8 to 10

115 VAC models: ....... 11 to 13

230 VAC models: ....... 45 to 51

Resistance Test

If reading is out of acceptable range...

Replace heating element.

Models:

Serial Numbers:

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

If reading is within acceptable range...

Heating element is OK.

Heating Element

B-19

Component Testing & Repair

Go To Table Of Contents

Heating Element - continued

Replacement

Removal

Step 1: Disconnect power to sterilizer.

Drain all water from reservoir.

Removal

Step 2: Remove inspection cover.

Refer to: Page

Cover Removal ..................................... C-2

Wiring Diagrams ................................... D-1

Installation

Step 4: Install inspection cover.

B-20

Installation

Step 2: Install two flat washers,

lockwashers, & nuts.

Note: Hold heating element in

place when tightening nuts.

Removal

Step 4: Remove two nuts ,

lockwashers & flat washers.

Heating Element

Models:

Serial Numbers:

M7 (-011 thru -016)

all

Installation

Step 3: Connect wires to heating element terminals.

(Refer to Section D for wiring diagrams)

Removal

Step 3: Tag & disconnect wires from

heating element terminals.

MA675000i

M7 (-020 thru -022)

all

Heating Element - continued

Go To Table Of Contents

Replacement - continued

Removal

Step 5: Remove heating element.

Remove gaskets from terminal posts.

Component Testing & Repair

Refer to: Page

Cover Removal ..................................... C-2

(Later Models)

Spacers

Installation

Step 1: Install gaskets onto terminal posts.

Models:

Serial Numbers:

Install spacers or spacer bracket*. Insert terminal posts thru chamber & thermostat bracket.

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

(Early Models)

Spacer Bracket*

* Spacer Bracket must be installed above gaskets to prevent leaking.

Heating Element

B-21

Component Testing & Repair

Go To Table Of Contents

Overheat Thermostats

Location & Function

Manual-Reset

Thermostat

Overheat Thermostats Page

Location & Function .............................. B-22

Resistance Test .................................... B-23

Replacement ........................................ B-24

Auto-Reset Thermostat

Wiring Diagrams ................................... D-1

Exploded View / Part Numbers ............. E-13

With the power cord properly connected...

Overheat Thermostats

Current overheat thermostats. This current supplies power to the timer.

(115 / 230 VAC)

continuously flows thru the two

(normally closed)

B-22

Overheat

Thermostats

MA675300i

Models:

Serial Numbers:

If either thermostat opens from the timer until the thermostat is reset or replaced.

NOTE

The Manual-Reset Thermostat contacts open at approximately 285°F (140°C). To reset, allow unit to cool, then press RESET button on front of unit.

The Auto-Reset Thermostat contacts open at approximately 295°F (146°C). This thermostat automatically resets when the unit cools to approx. 265°F (129°C).

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

(overheat or malfunction),

voltage is removed

Overheat Thermostats - continued

Go To Table Of Contents

Resistance Test

Attention!

Inspect thermostat for physical damage If damage is apparent, replace thermostat

Resistance Test

Step 1: Disconnect wires from thermostat terminals.

(ex. cracked plastic).

Component Testing & Repair

Refer to: Page

Cover Removal ..................................... C-2

Acceptable Reading

0.00

(approximately)

Models:

Serial Numbers:

M7 (-011 thru -016)

all

Resistance Test

Step 2: Place meter probes on terminals.

[Set meter to 200 ohms (

M7 (-020 thru -022)

all

Ω)]

ResistanceTest

If reading is (approximately) 0.00 ...

Thermostat is good.

If reading is OL...

Replace thermostat.

Overheat

Thermostats

B-23

Component Testing & Repair

Go To Table Of Contents

Overheat Thermostats - continued

Replacement

Removal

Step 1: Disconnect power to sterilizer.

Drain all water from reservoir.

Removal

Step 4: Disconnect wires.

Remove thermostat.

Installation

Step 3: Connect wires.

Refer to: Page

Wiring Diagrams ................................... D-1

Installation

Step 1: Install thermostat.

Removal

Step 3: Loosen two nuts on

heating element posts.

B-24

Installation

Step 4: Install inspection cover.

Overheat

Thermostats

Removal

Step 2: Remove inspection cover.

Models:

Serial Numbers:

M7 (-011 thru -016)

all

Installation

Step 2: Tighten two nuts.

M7 (-020 thru -022)

all

Pressure Relief Valve

Go To Table Of Contents

Location & Function

If the pressure in the chamber exceeds 34 psi (234kPa)...

The pressure relief valve opens to prevent unsafe conditions.

Component Testing & Repair

Pressure Relief Valve Page

Location & Function .............................. B-25

Testing - refer to:

Checking for Pressure Leaks ............

Replacement ........................................ B-25

Exploded View / Part Numbers ............. E-8

B-2

Pressure Relief

Valve

Replacement

Installation

Step 1: Apply hi-temp sealant to valve threads.

Install valve.

Removal

Step 1: Unscrew pressure relief valve.

R

Models:

Serial Numbers:

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

MA675700i

Pressure Relief Valve

B-25

Component Testing & Repair

Go To Table Of Contents

Timer

Location & Function

Timer Page

Location & Function .............................. B-26

Supply Voltage Test ............................. B-27

Output Voltage Test.............................. B-28

Replacement ........................................ B-29

Wiring Diagrams ................................... D-1

Exploded View / Part Numbers ............. E-12

NOTE

Current is supplied to the timer thru the two overheat thermostats.

When the timer is turned ON...

The timer contacts to the timer motor & the temperature relay close, and voltage is supplied to these components. When voltage is applied to the timer motor, the time setting counts down. (The contacts to the timer buzzer remain open).

B-26

R

Timer

Models:

Serial Numbers:

When the timer setting expires...

The timer contacts to the temperature relay open, stopping the current flow to the relay.

The timer contacts to the buzzer close for one minute. Current flows to the buzzer, resulting in a audible signal. After one minute, the contacts to the timer motor & the buzzer open, stopping the current flow to these two components.

MA675800i

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

Timer - continued

Go To Table Of Contents

Supply Voltage Test

Caution

This test must be performed with the power cord connected.

Component Testing & Repair

Refer to: Page

Cover Removal ..................................... C-2

Output Voltage Test.............................. B-28

Supply Voltage Test

Step 1: Place meter probes on terminals as shown.

[Set meter to VAC]

Acceptable Range

Models:

Serial Numbers:

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

line voltage

(115 / 230 VAC +10%)

MA676000i

Supply VoltageTest

If reading is within range...

Perform

If reading is out of range...

Check voltage supply.

(overheat thermostats, fuse, etc.)

Output Voltage Test.

Timer

B-27

Component Testing & Repair

Go To Table Of Contents

Timer - continued

Output Voltage Test

Caution

This test must be performed with the power cord connected.

(perform Supply Voltage Test first)

Refer to: Page

Cover Removal ..................................... C-2

Supply Voltage Test ............................. B-27

Voltage to Temp. Relay

Step 1: Turn timer knob to 10 minutes.

Place meter probes on terminals as shown.

[Set meter to VAC]

Voltage to Timer Motor

Step 1: Turn timer knob to 10 minutes.

Place meter probes on terminals as shown.

[Set meter to VAC]

Acceptable Range

line voltage

(115 / 230 VAC +10%)

Output VoltageTest

If reading is within range...

Timer is functioning properly.

If reading is out of range...

Replace timer.

Voltage to Timer Buzzer

Step 1: Turn timer knob to 1 minute

Place meter probes on terminals as shown.

[Set meter to VAC]

B-28

Timer

(or less)

.

Models:

Serial Numbers:

M7 (-011 thru -016)

all

MA675900i

M7 (-020 thru -022)

all

Timer - continued

Go To Table Of Contents

Replacement

Component Testing & Repair

Refer to: Page

Cover Removal ..................................... C-2

Wiring Diagrams ................................... D-1

Installation

Step 2: Connect wires.

(refer to Wiring Diagrams)

Removal

Step 2: Tag and disconnect wires.

R

Installation

Step 3: Install timer knob.

Tighten set screw.

Removal

Step 1: Loosen set screw.

Remove timer knob.

Models:

Serial Numbers:

M7 (-011 thru -016)

all

Removal

Step 3: Remove two screws.

Remove timer.

M7 (-020 thru -022)

all

Installation

Step 1: Install timer.

Install two screws.

MA521501i

Timer

B-29

Component Testing & Repair

Go To Table Of Contents

Timer Buzzer

Location & Function

When the timer setting expires...

Timer contacts to the buzzer close Current flows to the buzzer, causing an audible signal.

Timer

Buzzer

for one minute

.

Volume Adjustment

To increase volume...

Loosen adjustment screw.

Replacement & Volume Adjustment

Timer Buzzer Page

Location & Function .............................. B-30

Testing - refer to:

Timer

Replacement & Volume Adjustment ..... B-30

Exploded View / Part Numbers ............. E-12

............................................... B-28

Installation

Step 1: Install buzzer.

Removal

Step 2: Remove buzzer.

B-30

R

Timer Buzzer

Models:

Serial Numbers:

To decrease volume...

Tighten adjustment screw.

(present on new-style buzzers only)

M7 (-011 thru -016)

all

Removal

Step 1: Disconnect buzzer wires.

Installation

Step 2: Connect buzzer wires.

Adjustment Screw

MA676100i

M7 (-020 thru -022)

all

Temperature Gauge

Go To Table Of Contents

Replacement

Installation

Step 2: Orient gauge face properly.

Tighten nut.

Removal

Step 1: Loosen nut.

Slide retainer bracket back.

Component Testing & Repair

Temperature Gauge Page

Replacement ........................................ B-31

Exploded View / Part Numbers ............. E-5

Installation

Step 3: Slide rubber sleeve back against fitting.

Tighten compression nut.

Removal

Step 2: Unscrew compressionnut.

Remove temperature gauge.

(Do not overtighten).

Models:

Serial Numbers:

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

Installation

Step 1: Install retainer bracket, nut, compression nut,

& rubber sleeve onto temperature gauge.

MA252301i

Temperature Gauge

B-31

R

threadlocking adhesive.

Go To Table Of Contents

Component Testing & Repair

Door Assembly

Door Replacement

Door Removal

Step 1: Move door handle to

unlatched position.

Door Installation

Step 1: Install door stop & screw.

Door Assembly Page

Testing - refer to:

Checking for Pressure Leaks ............

Door Replacement ................................ B-32

Gasket Replacement ............................ B-32

Disassembly / Assembly ...................... B-33

Exploded View / Part Numbers ............. E-6

B-2

Door Removal

Step 2: Remove nut,

screw, & door stop.

Gasket Replacement

Gasket Installation

Step 1: Using a brush, clean all

debris from gasket channel.

Door Installation

Step 2: Install nut*

*apply removeable threadlocking adhesive

R

(Do not overtighten)

Door

Gasket

Channel

Gasket

Gasket Installation

Step 2: Lubricate gasket w/soapy water.

Insert gasket into gasket channel.

MA676200i

B-32

Door Assembly

Models:

Serial Numbers:

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

Door Assembly - continued

Go To Table Of Contents

Disassembly / Assembly

Assembly

Step 2: Install long spring & short spring.

Install door w/bowed edges at top & bottom.

Component Testing & Repair

Disassembly

Step 1: Remove cap nut, washer, & door.

Remove short spring & long spring.

Assembly

Step 3: Apply removable threadlocking adhesive

to T-bolt threads & face of washer. Install washer & cap nut.

Disassembly

Step 2: Remove push nut, pin,

handle, & cross arm.

Models:

Serial Numbers:

Assembly

Step 4: Install cross arm & handle.

M7 (-011 thru -016)

all

Disassembly

Step 3: Remove T-bolt from U-bracket.

Secure with pin & push nut.

M7 (-020 thru -022)

all

Assembly

Step 1: Install T-bolt into U-bracket.

Door Assembly

B-33

Component Testing & Repair

Go To Table Of Contents

Reservoir Tank

Removal

Step 1: Drain all water from reservoir.

Removal

Step 2: Loosen nut.

Reservoir Tank Page

Removal ............................................... B-34

Installation ............................................ B-35

Exploded View / Part Numbers ............. E-8

Removal

Step 3: Remove bulkhead fitting & washer.

Removal

Step 6: Remove condensing coil, & washer.

Removal

Step 7: Pull bellows tube out of tank.

Removal

Step 5: Loosen nut.

B-34

Reservoir Tank

Removal

Step 4: Remove clamp & drain hose.

Models:

Serial Numbers:

M7 (-011 thru -016)

all

R

MA523001i

Removal

Step 8: Remove four screws & tank.

M7 (-020 thru -022)

all

Reservoir Tank

Go To Table Of Contents

Installation

Note

When reconnecting plumbing, apply teflon tape or sealant to threads - except where compression fittings are used.

Installation

Step 5: Install bulkhead fitting & washer.

Partially install nut.

Component Testing & Repair

Installation

Step 8: Tighten all fittings

before filling reservoir.

Installation

Step 6: Reconnect plumbing.

Models:

Serial Numbers:

Tighten nut.

Installation

Step 3: Insert bellows tubing into tank.

Installation

Step 2: Reconnect plumbing.

Installation

Step 7: Install drain tube & clamp.

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

Installation

Step 1: Install condensing coil & washer.

Secure with nut.

R

Installation

Step 4: Install four screws.

Reservoir Tank

MA523001i

B-35

Component Testing & Repair

Go To Table Of Contents

Chamber Assembly

Removal

Step 1: Drain all water from reservoir.

Chamber Assembly Page

Removal ............................................... B-36

Disassembly / Assembly ...................... B-37

Installation ............................................ B-38

Exploded View / Part Numbers ............. E-10

Removal

Step 2: Remove the following components:

Covers Tray Plate / Rack Door Assembly & Gasket Temperature Regulator Assy. Heating Element Overheat Thermostats

R

Removal

Step 3: Disconnect compression

fitting from top of chamber.

Removal

Step 5: Remove screw(s) securing bracket* to base.

Removal

Step 4: Disconnect compression

Refer to

Covers ............................................... C-2

Tray Plate / Rack .................................. C-3

Door Assembly / Gasket ....................... B-32

Temperature Regulator Assembly ........ B-15

Heating Element ................................... B-20

Overheat Thermostats .......................... B-24

Remove chamber.

* Bracket design may vary.

fitting from bottom of chamber.

(Removing)

:

Chamber Assembly

B-36

Models:

Serial Numbers:

M7 (-011 thru -016)

all

MA523101i

M7 (-020 thru -022)

all

Chamber Assembly - continued

Go To Table Of Contents

Disassembly / Assembly

Disassembly

Step 1: Remove banding & insulation.

Assembly

Step 4: Install insulation & banding.

Component Testing & Repair

Assembly

Step 2: Install two fittings* into chamber.

*apply teflon tape / hi-temp sealant

Disassembly

Step 3: Remove two fittings from chamber.

Assembly

Step 1: Position door hinge & washer.

Disassembly

Step 3: Disconnect spring.

Models:

Serial Numbers:

Install screw & nut*. Connect spring.

*apply removeable threadlocking adhesive

Remove door hinge.

M7 (-011 thru -016)

all

M7 (-020 thru -022)

all

Rear

Spring Hole

Assembly

Step 3:

(If applicable)

Install bracket.

Disassembly

Step 2: Remove bracket from chamber.

Note: On later models, the bracket is welded

to the chamber - skip this step.

MA253301i

Chamber Assembly

B-37

Component Testing & Repair

MA523101i

R

Go To Table Of Contents

Chamber Assembly- continued

Installation

Note

Replace compression fittings if damage is apparent.

Assembly

Step 3: Connect compression fitting / plumbing

to fitting on top of chamber.

Assembly

Step 4: Install the following components:

Overheat Thermostats Heating Element Temperature Regulator Assy. Door Assembly & Gasket Tray Plate / Rack Covers

Refer to

Overheat Thermostats .......................... B-24

Heating Element ................................... B-20

Temperature Regulator Assembly ........ B-16

Door Assembly / Gasket ....................... B-32

Tray Plate / Rack .................................. C-3

Covers ............................................... C-2

(Installing)

:

Installation

Step 1: Secure bracket* to base.

*Bracket design may vary.

Chamber Assembly

B-38

Models:

Serial Numbers:

M7 (-011 thru -016)

all

Assembly

Step 2: Connect compression fitting / plumbing

to fitting on bottom of chamber.

M7 (-020 thru -022)

all

Access Procedures

Go To Table Of Contents

Access Procedures

Removing & Installing: Page

Covers / Panels ................................... C-2

Tray Plate / Rack .................................. C-3

Draining / Filling the Reservoir ............. C-4

Models:

Serial Numbers:

Section C

C-1

Access Procedures

Go To Table Of Contents

Covers / Panels

Removal / Installation

Caution

Always unplug power cord before removing any covers / panels.

Removal

Step 2: Remove cover.

Refer To: Page

Operation & Troubleshooting ................ A-1

Component Testing / Repair ................. B-1

Access Procedures .............................. C-1

Wiring Diagrams ................................... D-1

Exploded Views / Part Numbers ........... E-1

Installation: M7 (-011 thru -016)

Step 1: Slide cover down over

edge of front panel.

Installation: M7 (-020 thru -022)

Step 1: Slide cover down over edge of front

panel & back panel

(not shown)

.

C-2

Covers / Panels

R

Removal

Step 1: Remove six screws.

Installation: M7 (all)

Step 2: Install six screws.

MA521401i

Models:

Serial Numbers:

Tray Plate / Rack

Go To Table Of Contents

Removal / Installation

Caution

Always allow unit to cool before removing trays or rack.

Removal

Step 1: Lift up on left side of tray plate

until it "pops" free of rack. Remove tray plate.

Installation

Step 2: Insert the right side of tray plate

under bottom wire of rack.

Access Procedures

Refer To: Page

Operation & Troubleshooting ................ A-1

Component Testing / Repair ................. B-1

Access Procedures .............................. C-1

R

Bottom Wire

Installation

Step 3: Push left side of plate down until it

engages w/ offset ends of rack.

Wiring Diagrams ................................... D-1

Exploded Views / Part Numbers ........... E-1

Models:

Serial Numbers:

ALL

Removal

Step 2: Squeeze bottom of rack together.

Pull rack out of chamber.

Installation

Step 1: Position rack w/ offset ends to the left.

Squeeze bottom of rack together. Push rack into chamber.

Offset Ends

(left)

Straight Ends

(right)

Tray Plate / Rack

C-3

Access Procedures

Go To Table Of Contents

Draining / Filling the Reservoir

Note:

To remove drain hose, press release lever.

Refer To: Page

Operation & Troubleshooting ................ A-1

Component Testing / Repair ................. B-1

Access Procedures .............................. C-1

Wiring Diagrams ................................... D-1

Exploded Views / Part Numbers ........... E-1

Filling

Step 1: Pour distilled water into reservoir until

the water level reaches the "full mark".

Do not overfill!

Draining

Step 1: Hold hose over a drain or suitable container.

Note: The max. reservoir capacity is: 1.3 gallon (4.9 liters)

Draining / Filling

C-4

Insert drain hose into coupling on front of unit.

Models:

Reservoir

Serial Numbers:

Full

Mark

ALL

Wiring Diagrams

Go To Table Of Contents

Wiring Diagrams & Schematics

Model Page

115 VAC models

M7 (-011 / -013 / -014 / -015) ............

M7 (-020 / -022) ................................

230 VAC models

M7 (-012 / -016) ................................

M7 (-021)...........................................

:

D-2

D-3

:

D-4

D-5

Models:

Serial Numbers:

Section D

D-1

Wiring Diagrams

Go To Table Of Contents

Wiring Diagrams

Refer To: Page

Operation & Troubleshooting ................ A-1

Component Testing / Repair ................. B-1

Access Procedures .............................. C-1

Wiring Diagrams ................................... D-1

Exploded Views / Part Numbers ........... E-1

POWER CORD

MANUAL-RESET

OVERHEAT

THERMOSTAT

( LOW WATER )

AUTO-RESET

OVERHEAT

THERMOSTAT

( LOW WATER )

TIMER

SWITCH

TEMPERATURE

REGULATOR

RELAY

"A"

WHITE

NC

WHITE

BLACK

NC

"B" "C"

BLACK

YELLOW

WHITE

HEATING ELEMENT

GREEN

TIMER MOTOR

TIMER BUZZER

HEATER LIGHT

WHITE

YELLOW

HEATING ELEMENT

TEMPERATURE

REGULATOR

RELAY

TM

WHITE

1

TIMER

ASSEMBLY

GROUND

YELLOW

WHITE

HEATER LIGHT

3

BLACK

GREEN

B

2

MANUAL-RESET

OVERHEAT

THERMOSTAT

( LOW WATER )

AUTO-RESET

OVERHEAT

THERMOSTAT

( LOW WATER )

WHITE

YELLOW

015-0752-00

WIRING HARNESS

TIMER BUZZER

YELLOW YELLOW

MA676800i

RED

YELLOW

Wiring Diagrams

D-2

(115 VAC Models)

Models:

Serial Numbers:

M7 (-011)

all

M7 (-013)

all

M7 (-014)

all

M7 (-015)

all

OVERHEAT

Go To Table Of Contents

o

C)

o

F (93oC)

OVERHEAT

o

F (+/-12 oF)

o

C)

o

F (129oC)

TIMER

SWITCH

F1 FUSE

NC

115V UNIT; 12A 250V FAST ACTING

MANUAL- RESET

THERMOSTAT (LOW WATER)

Open 285 oF (+/-12 oF) (140.5 Closes 200

AUTO- RESET

THERMOSTAT (LOW WATER)

Open 295 (146 Closes 265

3

WHITE

TEMPERATURE

REGULATOR

RELAY

NC

WH ITE

:

BLACK

9

RED

BLACK

8

RED

3

1

BTM

BLACK

YELLOW

WH ITE

HEATER ELEMENT

115 VAC = 12 Ohms

BLACK

7

FILL / VENT

SWITCH

(Switch Contacts Open Until Lever is pressed)

7

NO

TIMER MOTOR

TIMER BUZZER

HEATER LIGHT

4

GREEN

GROUND

6

BLACK

TM

(Lit When Heater

Is On)

POWER

CORD

WH ITE

FILL / VENT

VALVE

YELLOW

BLACK

YELLOW

1

2

YELLOW

Wiring Diagrams

Refer To: Page

Operation & Troubleshooting ................ A-1

Component Testing / Repair ................. B-1

RED

WH ITE

POWER

CORD

F1 FUSE:

12A, 250V FAST ACTING

GREEN

BLACK

7

BLACK

MANUAL- RESET

(LOW WATER)

Open 285 oF (+/-12 oF) (140.5 Closes 200

9

OVERHEAT

THERMOSTAT

o

C)

o

F (93oC)

8

RED

GROUND

AUTO- RESET

OVERHEAT THERMOSTAT (LOW WATER)

Open 295 oF (+/-12 oF)

o

(146

C)

o

Closes 265

F (129oC)

5

HEATER ELEMENT

115 VAC = 12 Ohms

YELLOW

WH ITE

YL

WH

YELLOW

PILOT LIGHT

(Lit when heater is ON)

TIMER

BUZZER

YL

RED

4

1

015-1790-00

WIRING

HARNESS

TEMPERATURE

REGULATOR

RELAY

2

TIMER

ASSEMBLY

2

4

YELLOW

1

5

3

1

TM

3

RD

3

RED

7

8

FILL / VENT

SWITCH

(Switch contacts OPEN until lever is pressed)

6

FILL / VENT

VALVE

BLACK

6

5

MA676900i

Access Procedures .............................. C-1

Wiring Diagrams ................................... D-1

Exploded Views / Part Numbers ........... E-1

Models:

Serial Numbers:

M7 (-020)

all

M7 (-022)

all

Wiring Diagrams

(115 VAC Models)

D-3

Wiring Diagrams

Go To Table Of Contents

Refer To: Page

Operation & Troubleshooting ................ A-1

Component Testing / Repair ................. B-1

Access Procedures .............................. C-1

Wiring Diagrams ................................... D-1

Exploded Views / Part Numbers ........... E-1

POWER CORD

MANUAL-RESET

OVERHEAT

THERMOSTAT

( LOW WATER )

AUTO-RESET

OVERHEAT

THERMOSTAT

( LOW WATER )

TIMER

SWITCH

TEMPERATURE

REGULATOR

RELAY

RED

"A"

WHITE

NC

WHITE

BROWN

NC

"B" "C"

BLACK

YELLOW

WHITE

HEATING ELEMENT

GREEN / YELLOW

TIMER MOTOR

TIMER BUZZER

HEATER LIGHT

BLUE

YELLOW

HEATING ELEMENT

TEMPERATURE

REGULATOR

RELAY

TM

BLUE

WHITE

1

TIMER

ASSEMBLY

GREEN / YELLOW

GROUND

YELLOW

WHITE

HEATER LIGHT

3

B

2

BROWN

MANUAL-RESET

OVERHEAT

THERMOSTAT

( LOW WATER )

AUTO-RESET

OVERHEAT

THERMOSTAT

( LOW WATER )

WHITE

YELLOW

015-0752-00

WIRING HARNESS

TIMER BUZZER

YELLOW YELLOW

MA677000i

RED

YELLOW

Wiring Diagrams

(230 VAC Models)

D-4

Models:

Serial Numbers:

M7 (-012)

all

M7 (-016)

all

OVERHEAT

Go To Table Of Contents

THERMOSTAT (LOW WATER)

o

C)

o

F (93oC)

AUTO- RESET

OVERHEAT THERMOSTAT (LOW WATER)

o

F (+/-12 oF)

o

C)

o

F (129oC)

TIMER

SWITCH

F1 FUSE

NC

230V UNIT; 8A 250V FAST ACTING

MANUAL- RESET

Open 285 oF (+/-12 oF) (140.5 Closes 200

Open 295 (146 Closes 265

3

WHITE

TEMPERATURE

REGULATOR

RELAY

NC

WH ITE

:

BLACK

9

BLACK

NC

8

RED

3

1

BTM

YELLOW

WH ITE

RED

7

FILL / VENT

(Switch contacts Open until leveris pressed)

7

BLACK

HEATER ELEMENT

230 VAC = 49 Ohms

BROWN

GREEN / YELLOW

GROUND

SWITCH

NO

BLACK

TIMER MOTOR

TM

TIMER BUZZER

HEATER LIGHT

(Lit when heater is ON)

4

POWER

CORD

BLUE

FILL / VENT

VALVE

6

1

2

YELLOW

BLACK

YELLOW

Wiring Diagrams

Refer To: Page

Operation & Troubleshooting ................ A-1

Component Testing / Repair ................. B-1

RED

7

1

BLACK

o

C)

4

9

o

F (129oC)

MANUAL- RESET

OVERHEAT THERMOSTAT (LOW WATER)

Open 285 oF (+/-12 oF)

o

(140.5

C)

o

Closes 200

F (93oC)

8

3

RED

FILL / VENT

SWITCH

(Switch contacts OPEN until lever is pressed)

7

6

BLACK

6

5

RED

FILL / VENT

VALVE

MA677100i

POWER

CORD

BROWN

BLUE

GROUND

5

TEMPERATURE

REGULATOR

RELAY

2

TIMER

ASSEMBLY

2

5

HEATER ELEMENT

230 VAC = 49 Ohms

4

YELLOW

1

3

1

TM

WH

3

RD

F1 FUSE:

8A, 250V FAST ACTING

GREEN / YELLOW

YELLOW

WH ITE

YL

YELLOW

PILOT

LIGHT

(Lit when heater is ON)

TIMER

BUZZER

YL

RED

AUTO- RESET

OVERHEAT

THERMOSTAT

(LOW WATER)

Open 295 oF (+/-12 oF) (146 Closes 265

015-1790-00

WIRING

HARNESS

Access Procedures .............................. C-1

Wiring Diagrams ................................... D-1

Exploded Views / Part Numbers ........... E-1

Models:

Serial Numbers:

M7 (-021)

all

Wiring Diagrams

(230 VAC Models)

D-5

Go To Table Of Contents

Exploded Views &

Go To Table Of Contents

Parts Lists

Model Page

M7

(-011 thru -016) ......................

M7

(-020 thru -022) ......................

E-2

E-3

Models:

Serial Numbers:

Section E

Always Specify Model & Serial Number

E-1

M7

Go To Table Of Contents

(-011 thru -016)

Items not shown:

Heating Element

& Thermostats .......... E-13

Power Cord ................. E-14

Rack & Trays ............... E-15

Packaging.................... E-16

Covers ......................E-4

includes: main cover, base plate, leveling feet, fill cap, etc.

Chamber

Components ............... E-10

includes: fittings & mounting bracket

Door Components ...... E-6

Fuses .............. E-15

Labels & Decals ..........E-17

Temperature Regulator

Components ............... E-7

includes: temp. relay & diaphragm cup

Reservoir ..................... E-8

includes:

Fuses .............. E-15

condensing coil & drain tube

R

Bellows & Plumbing ... E-11*

includes: hinge, & door gasket

Front Panel

Components ............E-5

includes: heater light, thermometer, knobs, & drain coupling

E-2

*

Indicates multiple pages due to a serial number break for the parts illustration

Timer / Buzzer ............. E-12

Timer & Buzzer ........... E-12

Fill / Vent Valve

& Plumbing ................. E-9*

MA677800i

M7

Go To Table Of Contents

Items not shown:

Heating Element

& Thermostats ..........E-13.1

Power Cord & Fuse ..... E-14.1

Rack & Trays ............... E-15

Packaging.................... E-16

Covers ......................E-4.1

includes: main cover, base plate, leveling feet, fill cap, etc.

(-020 thru -022)

Labels & Decals ..........E-17.1

Temperature Regulator

Components ............... E-7

includes: temp. relay & diaphragm cup

Reservoir Tank ............ E-8.1

Chamber

Components ............... E-10.1

includes: fittings & mounting bracket

Door Components ...... E-6

includes: hinge, & door gasket

Front Panel

Components ............ E-5.1

includes: heater light, thermometer, knobs, & drain coupling

includes: condensing coil & drain tube

R

Bellows & Plumbing ... E-11.2

Timer & Buzzer ........... E-12

Fill / Vent Valve

& Plumbing ................. E-9.3

includes: fill/vent switch

MA677801i

*

Indicates multiple pages due to a serial number break for the parts illustration

E-3

053-1037-00

Go To Table Of Contents

Refer To: Page

H98009

5

H98135

6

Operation & Troubleshooting ....... A-1

Component Testing / Repair ........ B-1

Access Procedures...................... C-1

Wiring Diagrams .......................... D-1

2

030-1198-00

3

Exploded Views / Part Numbers .. E-1

002-0643-00

1

050-4286-00

H98011

11

8

045-0001-31

7

4

122357

12

9

050-4423-00

002-0822-00

10

040-0010-125

8

MA674101i

Item Description Qty.

1 Cover Kit

2 • Cooling Rail ............................................... 2

3 • Main Cover ................................................ 1

4 • Push Nut .................................................... 6

5 Fill Cap ......................................................... 1

6 Rubber Seal ................................................. 1

7 Lockwasher .................................................. 6

8 Screw

9 Keps Nut ....................................................... 4

10 Rubber Foot Kit

11 Base Plate .................................................... 1

12 Inspection Cover .......................................... 1

Always Specify Model & Serial Number

(Includes items 2 thru 4) ..............

(#10 x 1/2", self-tapping) ...................

(includes nut) .....................

1

6

4

E-4

Covers

Rev. 8/05

Models:

Serial Numbers:

M7 (-011 thru -016)

all

053-1037-00

Go To Table Of Contents

H98011

H98009

H98135

Refer To: Page

Operation & Troubleshooting ....... A-1

Component Testing / Repair ........ B-1

Access Procedures ...................... C-1

Wiring Diagrams .......................... D-1

Exploded Views / Part Numbers .. E-1

002-0840-00

045-0001-31

029-3408-00

Models:

Serial Numbers:

10

M7 (-020 thru -022)

all

050-4423-00

11

041-0010-04

002-0822-00

040-0010-163

MA674101i

Item Description Qty.

1 Fill Cap ......................................................... 1

2 Rubber Seal ................................................. 1

3 Main Cover w/ labels

(includes items 4 & 5) ................................

4 Push Nut ....................................................... 6

5 Cooling Rail .................................................. 2

6 Lockwasher .................................................. 1

7 Screw 8 Nut

9 Rubber Foot Kit

10 Base Assembly ............................................ 1

11 Inspection Cover ......................................... 1

(#10 x 5/8", self-drilling/tapping) .......

(used only on units built prior to serial

number V411489) ........................................

(includes nut) ....................

Always Specify Model & Serial Number

1

7

4 4

Covers

E-4.1

Rev. 4/07

Ritter:

Go To Table Of Contents

Midmark:

100 / 120 VAC: 230 VAC:

002-0688-00 002-0688-01

Ritter: Midmark: Dabi Alante:

057-0461-00

015-1304-00 015-1304-01

002-0242-00

053-1008-00

1

050-4285-10

061-0774-00 061-0774-01 061-0774-02

4

16

17

14

9

053-1008-01

13

Refer To: Page

Operation & Troubleshooting ....... A-1

Component Testing / Repair ........ B-1

Access Procedures ...................... C-1

2

045-0001-08

5

040-0010-75

6

Wiring Diagrams .......................... D-1

Exploded Views / Part Numbers .. E-1

3

H224033

7

041-0250-07

8

014-0183-01

20

053-0404-07

19

014-0192-00

18

9

Item Description Qty.

15

12

053-0987-00

11

10

053-0990-00

1 Front Panel Assy.

2 • Front Panel

3 • Label .......................................................... 1

4 Alignment Pin ............................................... 1

5 Lockwasher .................................................. 1

6 Screw ........................................................... 1

7 Thermometer Bracket .................................. 1

8 Jam Nut ........................................................ 1

9 Refer to: 10 Refer to:

11 Shut-Off Coupling ........................................ 1

12 Lever Knob .................................................. 1

13 Timer Knob 14 Temperature Knob 15 Refer to:

16 Heater Light ................................................. 1

17 Thermometer Kit

18 • Compression Nut ...................................... 1

19 • Rubber Sleeve .......................................... 1

20 • Male Connector ........................................ 1

Always Specify Model & Serial Number

Temp. Regulator Components

Fill / Vent Valve .........................

Heating Element /

Overheat Thermostats .......................

(includes items 2 & 3) .....

(w/o label) ..............................

(includes set screw) ................

(includes set screw) ....

E-13

(incl. items 20 thru 22) ....

1 1

E-7 E-9

1 1

1

E-5

Front Panel

Components

Rev 2/07

Models:

Serial Numbers:

MA671900i

M7 (-011 thru -016)

all

050-6034-10

Go To Table Of Contents

045-0001-08

040-0010-75

H224033

Refer To: Page

Operation & Troubleshooting ....... A-1

Component Testing / Repair ........ B-1

Access Procedures ...................... C-1

Wiring Diagrams .......................... D-1

Exploded Views / Part Numbers .. E-1

100 / 120 VAC: 230 VAC:

053-1008-00

Ritter: Midmark:

061-0900-00 061-0900-01

057-0461-00

015-1304-00 015-1304-01

002-0242-00

053-1008-01

041-0250-20

053-0990-00

014-0183-01

053-0404-07

014-0192-00

Item Description Qty.

1 Front Panel

2 Label ............................................................. 1

3 Alignment Pin ............................................... 1

4 Lockwasher ................................................. 1

5 Screw ........................................................... 1

6 Thermometer Bracket

built prior to 4/1/2007) ..................................

7 Jam Nut........................................................ 1

8 Refer to:

9 Shut-Off Coupling ........................................ 1

10 Refer to: 11 Timer Knob 12 Temperature Knob 13 Refer to:

Overheat Thermostats .......................

14 Heater Light ................................................. 1

15 Thermometer Kit

16 • Compression Nut ...................................... 1

17 • Rubber Sleeve .......................................... 1

18 • Male Connector ........................................ 1

Always Specify Model & Serial Number

(w/o label) ................................

(used only on units

Temp. Regulator Components

Fill / Vent Valve .........................

(includes setscrew) .................

(includes setscrew) .....

Heating Element /

(incl. items 20 thru 22) ....

1

E-7

E-9

1 1

E-13

1

Models:

Serial Numbers:

M7 (-020 thru -022)

all

MA671905i

Front Panel

Components

Rev 4/07

E-5.1

H96773

Go To Table Of Contents

H96771

13

14

040-0010-103

H97991

15

16

17

002-0243-00

18

Refer To: Page

Operation & Troubleshooting ....... A-1

Component Testing / Repair ........ B-1

Access Procedures ...................... C-1

Wiring Diagrams .......................... D-1

Exploded Views / Part Numbers .. E-1

040-0250-69

002-0249-00

042-0005-16

053-0513-00

1

H96776

H96772

4

2

H96775

7

5

3

053-1579-00

H106313

H96774

9

8

050-2359-00

K906034

10

12

11

041-0250-15

21

041-0010-10

050-4783-00

24

23

045-0000-04

22

6

MA511703i

19

H106330

20

Item Description Qty.

1 Door Assembly

2 • Handle ....................................................... 1

3 • Push Nut .................................................... 1

4 • Pin ............................................................. 1

5 • Refer to

6 • Cross Arm .................................................. 1

7 • T-bolt ......................................................... 1

8 • U-bracket ................................................... 1

9 • Long Spring ............................................... 1

10 • Short Spring .............................................. 1

11 • Door ........................................................... 1

12 • Gasket ....................................................... 1

13 • Washer ................................................... 1

14 • Cap Nut

15 Door Stop ..................................................... 1

16 Bolt ............................................................... 1

17 Door Gasket ................................................. 1

18 Bolt ............................................................... 1

19 Refer to

20 Spring ........................................................... 1

21 Torque Nut ................................................... 1

22 Washer ......................................................... 1

23 Hinge ............................................................ 1

24 Torque Nut ................................................... 1

Always Specify Model & Serial Number

(incl. items 2 thru 13) ...........

Label Location .........................

(apply adhesive #042-0024-02) ..

Chamber Components

............... Ref

1

Ref

1

Door Components

E-6

Rev. 5/05

Models:

Serial Numbers:

ALL

H97076

Go To Table Of Contents

H97075

Refer To: Page

Operation & Troubleshooting ....... A-1

Component Testing / Repair ........ B-1

Access Procedures ...................... C-1

Wiring Diagrams .......................... D-1

Exploded Views / Part Numbers .. E-1

H97966

H97948

Models:

Serial Numbers:

ALL

002-0838-00

H97951

040-0006-44

H98064

040-0008-47

040-0006-38

MA511902i

Item Description Qty.

1 Temperature Relay Kit

(incl. items 2 & 3)

2 • Spacer ....................................................... 1

3 • Screw

4 Flexible Shaft Assembly ............................... 1

5 Set Screw ..................................................... 1

6 Diaphragm Cup ............................................ 1

7 Gasket .......................................................... 1

8 Nut ................................................................ 1

9 Lockwasher .................................................. 1

Always Specify Model & Serial Number

(#6-32 x 7/16") ................................

...................................... 1

3

Temperature Regulator

Components

Rev 1/08

E-7

053-0974-00

Go To Table Of Contents

014-0324-00

2

H98089

Refer To: Page

Operation & Troubleshooting ....... A-1

Component Testing / Repair ........ B-1

Access Procedures ...................... C-1

Wiring Diagrams .......................... D-1

3

053-0944-00

4

1

Exploded Views / Part Numbers .. E-1

053-0990-01

053-0391-02

14

12

053-1036-01

4

8

11

053-0391-03

15

002-0653-00

13

5

029-2291-00

6

014-0183-02

7

014-0209-00

016-0748-01

10

8

053-1036-00

9

040-0010-75

16

Item Description Qty.

1 Tank ............................................................. 1

2 Tank Lid........................................................ 1

3 Pressure Relief Valve................................... 1

4 Bulkhead Fitting

5 Neoprene Washer ........................................ 1

6 Condensing Coil Assy.

7 • Compression Fitting .................................. 1

8 • Bulkhead Fitting

9 Neoprene Washer ........................................ 1

10 Hose Clamp ................................................. 2

11 Tank Drain Tube .......................................... 1

12 Refer to: 13 Drain Hose Kit

14 • Barbed Fitting ............................................ 1

15 • Removeable Drain Tube ........................... 1

Always Specify Model & Serial Number

(includes nut) ....................

(incl. items 7 & 8) ....

(includes nut) ..................

Front Panel Components ..........

(incl. items 14 thru 16) .........

1

Ref

1

E-8

Reservoir

Models:

Serial Numbers:

MA675104i

M7 (-011 thru -016)

all

053-0974-00

Go To Table Of Contents

053-0944-00

H98089

3

Refer To: Page

Operation & Troubleshooting ....... A-1

Component Testing / Repair ........ B-1

Access Procedures ...................... C-1

2

Wiring Diagrams .......................... D-1

Exploded Views / Part Numbers .. E-1

4

029-3302-00

053-0990-01

1

053-0391-02

15

014-0324-00

H97966

5

9

12

13

16

5

6

14

053-0391-03

002-0653-00

11

016-0748-01

053-1036-01

10

17

8

014-0209-00

9

040-0010-75

7

014-0432-00

014-0485-00

Item Description Qty.

1 Reservoir Assembly

2 • Tank ........................................................... 1

3 • Tank Lid ..................................................... 1

4 • Pressure Relief Valve ................................ 1

5 • Bulkhead Fitting

6 • Washer ...................................................... 2

7 • Condensing Coil ........................................ 1

8 • Compression Fitting .................................. 1

9 • Bulkhead Fitting

10 • Neoprene Washer ..................................... 1

11 • Hose Clamp ............................................... 2

12 • Tank Drain Tube ........................................ 1

13 Refer to: 14 Drain Hose Kit

15 • Barbed Fitting ............................................ 1

16 • Removeable Drain Tube ........................... 1

17 Screw ........................................................... 2

Always Specify Model & Serial Number

Front Panel Components ..........

(incl. items 2 thru 12) ..

(includes nut)..................

(incl. items 14 thru 16) .........

1

Ref

1

Models:

Serial Numbers:

M7 (-020 thru -022)

all

MA675103i

Reservoir

Rev. 5/05

E-8.1

014-0183-02

Go To Table Of Contents

H98136

H98069

Refer To: Page

Operation & Troubleshooting ....... A-1

Component Testing / Repair ........ B-1

Access Procedures ...................... C-1

Wiring Diagrams .......................... D-1

Exploded Views / Part Numbers .. E-1

002-0247-00

041-0010-10

050-4315-00

10

11

H98070

041-0010-09

H98077

13

12

050-1926-00

040-0010-73

H98138

H98068

042-0010-07

14

15

H98072

18

052-0332-00

16

052-0331-00

17

18

MA674600i

014-0184-01

Item Description Qty.

1 Fill/Vent Valve Kit

2 • Compression Fitting .................................. 2

3 • O-ring

4 • Plunger ...................................................... 1

5 • O-ring

6 • Valve Body ................................................ 1

7 • Spring ........................................................ 1

8 • Nut

9 • Bracket ...................................................... 1

10 Torque Nut ................................................... 1

11 Lever ............................................................ 1

12 Lever Bracket ............................................... 1

13 Screw

14 Pop Rivet ...................................................... 3

15 Clip ............................................................... 3

16 Tubing 17 Tubing

18 Elbow Fitting ................................................. 2

(incl. items 2 thru 9) ........

(apply hi-temp lube) .......................

(#10-32, brass) ...................................

(#10-32 x 5/8") ..................................

(Fill) ..................................................

(Vent) ...............................................

Always Specify Model & Serial Number

1

1 1

E-9

Fill / Vent Valve

& Plumbing

Models:

Serial Numbers:

M7 (-011)

MH1000 thru MH1802

M7 (-012)

MJ1000 thru MJ1091

M7 (-014)

ML1000 thru ML2133

Refer To: Page

Go To Table Of Contents

Operation & Troubleshooting ....... A-1

Component Testing / Repair ........ B-1

Access Procedures ...................... C-1

Wiring Diagrams .......................... D-1

Exploded Views / Part Numbers .. E-1

041-0010-10

050-4315-00

050-4793-00

040-0010-73

050-1926-00

8

014-0183-02

014-0369-00

016-0843-00

042-0010-15

002-0648-00

13

11

052-0331-00

12

13

MA674601i

052-0332-00

014-0184-01

Item Description Qty.

1 Fill/Vent Valve Kit

2 • Compression Fitting .................................. 2

3 • Bracket ...................................................... 1

4 • Valve Body ................................................ 1

5 • Clip ............................................................ 3

6 • Pop Rivet ................................................... 3

7 Lever ............................................................ 1

8 Lever Bracket ............................................... 1

9 Torque Nut ................................................... 1

10 Screw 11 Tubing 12 Tubing

13 Elbow Fitting ................................................. 2

(#10-32 x 5/8") ..................................

(Fill) ..................................................

(Vent) ...............................................

Always Specify Model & Serial Number

(incl. items 2 thru 6) ........

1

1 1 1

Models:

Serial Numbers:

M7 (-011)

MH1803 thru MH3104

M7 (-012)

MJ1092 thru MJ1241

M7 (-014)

ML2132 thru ML4209

Fill / Vent Valve

& Plumbing

E-9.1

Refer To: Page

Go To Table Of Contents

Operation & Troubleshooting ....... A-1

Component Testing / Repair ........ B-1

Access Procedures ...................... C-1

Wiring Diagrams .......................... D-1

Exploded Views / Part Numbers .. E-1

041-0010-10

050-4315-00

H98077

040-0010-73

014-0402-00

050-1926-00

7

002-0649-00

042-0010-15

016-0843-00

12

10

11

052-0331-00

12

052-0332-00

014-0184-01

MA674602i

Item Description Qty.

1 Fill/Vent Valve Kit

2 • Valve Body

3 • Bracket ...................................................... 1

4 • Clip ............................................................ 3

5 • Pop Rivet ................................................... 3

6 Lever ............................................................ 1

7 Lever Bracket ............................................... 1

8 Torque Nut ................................................... 1

9 Screw 10 Tubing 11 Tubing

12 Elbow Fitting ................................................. 2

(#10-32 x 5/8") ..................................

(Fill) ..................................................

(Vent) ...............................................

Always Specify Model & Serial Number

(incl. items 2 thru 5) ........

(includes nut) .........................

1 1

1 1 1

E-9.2

Fill / Vent Valve

& Plumbing

Models:

Serial Numbers:

M7 (-011)

MH3105 thru present

V2200 thru present

M7 (-012)

MJ1242 thru present

V2200 thru present

M7 (-014)

ML4210 thru present

V2200 thru present

M7 (-013/-015 /-016)

all

014-0433-00

Go To Table Of Contents

Refer To: Page

Operation & Troubleshooting ....... A-1

Component Testing / Repair ........ B-1

Access Procedures...................... C-1

Wiring Diagrams .......................... D-1

Exploded Views / Part Numbers .. E-1

115 VAC: 230 VAC:

014-0236-00 014-0236-01

015-1791-00

050-6057-00

115 VAC:

014-0236-11

040-0010-74

014-0236-10

014-0184-01

040-0250-157

014-0183-02

MA674605i

Item Description Qty.

1 Fill/Vent Valve .............................................. 1

2 Mounting Bracket ......................................... 1

3 Screw 4 Bolt

5 Elbow Fitting ................................................. 1

6 Male Fitting

7 Tubing .......................................................... 1

8 Fill / Vent Switch ........................................... 1

9 Replacement Coil ........................................ 1

10 Replacement Kit

(#10-32 x 3/8") ..................................

(1/4-20 x 1/2") .......................................

(3/8") .........................................

(Includes plunger, guide,

and seals) ....................................................

Always Specify Model & Serial Number

2 2

1

Models:

Serial Numbers:

M7 (-020 thru -022)

all

Fill / Vent Valve

& Plumbing

Rev 2/08

E-9.3

H99388-29

Go To Table Of Contents

H97980

11

10

12

H99387

014-0183-01

2

1

030-0976-00

3

115 VAC: 230 VAC: 100 VAC:

051-0721-00

5

040-0250-47

6

029-2304-00 029-2304-01 029-2304-02

H99388-27

4

Refer To:

Page

Operation & Troubleshooting ....... A-1

Component Testing / Repair ........ B-1

Access Procedures ...................... C-1

Wiring Diagrams .......................... D-1

Exploded Views / Part Numbers .. E-1

041-0250-15

Chamber Components

E-10

9

014-0184-01

8

Models:

Serial Numbers:

The chamber bracket (item #6) on some models may be attached to the base plate w/ pop rivets.

When installing a new bracket, replace rivets w/ screws (item #7).

040-0010-74

7

M7 (-011 thru -016)

all

MA676600i

Item Description Qty.

1 Chamber Assembly -

includes items 2 & 3 and the following: .....

• Heating Element & Thermostats (2)

• Temperature Regulator Assembly

• Door Hinge & Door Gasket

2 • Compression Fitting .................................. 1

3 • Chamber Shell 4 Banding Strap

5 Chamber Bracket ......................................... 1

6 Screw ........................................................... 1

7 Screw ........................................................... 2

8 Elbow Fitting ................................................. 1

9 Nut ................................................................ 1

10 Insulation ...................................................... 1

11 Banding Strap .............................................. 2

12 Banding Clip ................................................. 2

Always Specify Model & Serial Number

complete

only ..................................

(end) .....................................

1

2 1

H99388-29

Go To Table Of Contents

Refer To: Page

Operation & Troubleshooting ....... A-1

7

H99387

8

Component Testing / Repair ........ B-1

Access Procedures ...................... C-1

Wiring Diagrams .......................... D-1

014-0183-01

2

016-0790-00

3

014-0184-01

4

1

115 VAC: 230 VAC:

029-3278-00 029-3278-01

Exploded Views / Part Numbers .. E-1

H97980

6

Item Description Qty.

040-0250-157

5

1 Chamber Assembly -

includes items 2 thru 4 & the following: ....

• Heating Element & Thermostats (2)

• Temperature Regulator Assembly

• Door Hinge & Door Gasket

• Timer Buzzer

2 • Compression Fitting .................................. 1

3 • Filter Screen .............................................. 1

4 • Elbow Fitting .............................................. 1

5 Screw ........................................................... 1

6 Insulation ...................................................... 1

7 Banding Strap .............................................. 2

8 Banding Clip ................................................. 2

Always Specify Model & Serial Number

MA676601i

complete

1

Models:

Serial Numbers:

M7 (-020 thru -022)

all

Chamber Components

E-10.1

13

Go To Table Of Contents

002-0679-00

7

Refer To: Page

Older Models w/ rubber

6

tubing MUST use Item #6

Operation & Troubleshooting ....... A-1

Component Testing / Repair ........ B-1

Access Procedures ...................... C-1

H335943

8

Wiring Diagrams .......................... D-1

Exploded Views / Part Numbers .. E-1

014-0184-00

9

10

014-0058-00

10

Bellows & Plumbing

E-11

12

014-0241-00

002-0375-00

014-0392-00

Item Description Qty.

1

014-0183-01

11

5

3

4

014-0240-00

2

3

Serial Numbers:

Models:

M7 (-011)

MH1000 thru MH6044

M7 (-012)

MJ1000 thru MJ1696

MA675600i

ML1000 thru ML7297

1 Refer to:

2 Tube ............................................................. 1

3 Compression Nut ......................................... 2

4 Bellows ......................................................... 1

5 Tube ............................................................. 1

6 Chamber Manifold Tube Kit

(includes items 7 thru 9)

7 • Refer to:

8 • Tube .......................................................... 1

9 • Elbow Fitting .............................................. 1

10 Refer to:

11 Compression Fitting ..................................... 1

12 Street Tee Fitting ......................................... 2

13 Refer to:

Always Specify Model & Serial Number

M7 (-014)

Reservoir ...................................

Chamber Assembly ................

Front Panel Components ..........

Chamber Assembly ..................

Ref

014-0183-01

Go To Table Of Contents

13

12

H335943

11

014-0184-00

10

Refer To: Page

Operation & Troubleshooting ....... A-1

Component Testing / Repair ........ B-1

Access Procedures ...................... C-1

Wiring Diagrams .......................... D-1

Exploded Views / Part Numbers .. E-1

Original Plumbing Configuration

Reconfigured Plumbing Configuration

(If plumbing has been reconfigured, refer to next page for replacement parts)

8

9

Item Description Qty.

014-0058-00

6

8

1

3

7

4

002-0375-01

5

4

2

Note: Item #2 will reconfigure Bellows plumbing to match current models.

1 Refer to:

2 Bellows Kit

3 Tube ............................................................. 1

4 Compression Nut ......................................... 3

5 Bellows ......................................................... 1

6 Tube ............................................................. 1

7 Compression Fitting ..................................... 1

8 Street Tee Fitting ......................................... 2

9 Refer to:

10 Elbow Fitting ................................................. 1

11 Refer to:

12 Tube ............................................................. 1

13 Compression Fitting ..................................... 1

Reservoir ...................................

(includes items 3 thru 7) ...........

Front Panel Components ..........

Chamber Assembly ..................

Ref

1

Ref

Models:

Serial Numbers:

M7 (-011)

MH6045 thru present

V2200 thru present

M7 (-012)

MJ1697 thru present

V2200 thru present

M7 (-014)

ML7298 thru present

V2200 thru present

MA675601i

M7 (-013/-015 /-016)

all

Always Specify Model & Serial Number

Bellows & Plumbing

E-11.1

10

Go To Table Of Contents

014-0480-01

9

Refer To: Page

Operation & Troubleshooting ....... A-1

Component Testing / Repair ........ B-1

Access Procedures ...................... C-1

Wiring Diagrams .......................... D-1

Exploded Views / Part Numbers .. E-1

7

8

002-0375-01

Bellows & Plumbing

E-11.2

1

014-0481-00

014-0484-00

7

6

4

Item Description Qty.

1 Refer to:

2

002-0375-00

014-0392-00

014-0482-00

Rev 10/05

5

4

3

Models:

Serial Numbers:

MA675602i

M7 (-020 thru -022)

all

2 Bellows Kit .................................................... 1

3 • Tube .......................................................... 1

4 • Compression Nut ....................................... 2

5 • Bellows ...................................................... 1

6 • Tube .......................................................... 1

7 • Compression Fitting .................................. 2

8 Refer to:

9 Tube ............................................................. 1

10 Refer to:

Always Specify Model & Serial Number

Reservoir ...................................

Front Panel Components ..........

Chamber Components ..............

Ref

Refer To: Page

Go To Table Of Contents

Operation & Troubleshooting ....... A-1

Component Testing / Repair ........ B-1

Access Procedures...................... C-1

Wiring Diagrams .......................... D-1

Exploded Views / Part Numbers .. E-1

R

040-0008-29

2

115 VAC:

1

230 VAC: 230 VAC -016:

040-0006-44

002-0373-00 002-0373-01

Not available

3

4

115 VAC: 230 VAC:

015-1813-00 015-1813-01

015-1815-00

5

[Ext. Wiring Harness - not shown]

MA671802i

Item Description Qty.

1 Timer Assembly Kit

2 • Screw

3 • Buzzer ....................................................... 1

4 • Screw 5 • Extended Wiring Harness

Always Specify Model & Serial Number

(#8-32 x 5/16") ................................

(#6-32 x 7/16") ................................

(required for older units only) .................

(incl. items 2 thru 5) .....

- not shown

1 1

1

Models:

Serial Numbers:

M7 (-011 thru -015)

all

M7 (-020 thru -022)

all

MA671801i

Timer / Buzzer

Rev. 8/05

E-12

057-0520-00

Go To Table Of Contents

053-1035-00

115 VAC: 230 VAC: 100 VAC:

H225913

030-0929-00

15

002-0839-00 015-0839-01 015-0894-02

9

015-0647-00

H97971

045-0001-56

H97949

H225620

16

12

H225619

14

040-0010-74

13

H98137

H225639

041-0010-10

10

030-1484-00

11

Old-style rocker assembly is not available.

Replace with item #11.

MA673901i

Refer To: Page

Operation & Troubleshooting ....... A-1

Component Testing / Repair ........ B-1

Access Procedures...................... C-1

Wiring Diagrams .......................... D-1

Exploded Views / Part Numbers .. E-1

Item Description Qty.

1 Heating Element

2 • Nut ............................................................. 2

3 • Gasket ....................................................... 2

4 Overheat Thermostat 5 Overheat Thermostat

6 Bracket ......................................................... 1

7 Washer ......................................................... 2

8 Lockwasher .................................................. 2

9 Heater Spacer .............................................. 1

10 Nut ................................................................ 1

11 Rocker Assembly ......................................... 1

12 Spacer .......................................................... 1

13 Screw ........................................................... 1

14 Bracket ......................................................... 1

15 Reset Button ................................................ 1

16 Reset Rod .................................................... 1

Always Specify Model & Serial Number

(includes items 2 & 3) ......

(manual-reset) ..........

(auto-reset) ...............

1

1 1

Heating Element &

E-13

Thermostats

Rev. 4/08

Models:

Serial Numbers:

M7 (-011 thru -016)

all

Midmark M7-2 Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual