Midmark PowerVac P3, PowerVac P5, PowerVac P7, PowerVac P14, PowerVac P6 Parts Manual

PowerVac

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®

Model Numbers:

Single Vac Units

P3 P5 P7

Twin Vac Units

P6 P10 P14

Service and

Parts Manual

Earlier Version Current Version

FOR USE BY MIDMARK TRAINED TECHNICIANS ONLY

Part No. 004-0494-00 Rev. AA7 (5/13/19)

GENERAL INFORMATION

Back

Ordering Parts ......................... iii

Serial Number Location .......... iii

Specifications ........................... iv

Model Identification /

Compliance Charts: ................. v

Warranty Information............... vi

TESTING & REPAIR - continued

cont.

Section B -

General Information

ACCESS PROCEDURES

TROUBLESHOOTING

Vacuum System ....................... A-2

Electrical System Operation

Power to System .................................

Wall Switch On ................................... A-4

Section A

Bottom Float contact Closed .............. A-5

Middle Float Contact Closed ............. A-6

Top Float Contact Closed ................... A-7

Liquid Evacuation Pump

(Accessory) ..............................

A-3

A-11

TESTING & REPAIR

Belt ............................................ B-2

Check Valve .............................. B-6

Vacuum Relief Valve................. B-9

Exhaust .....................................B-12

Float .......................................... B-15

Section B

Low Voltage .............................. B-18

Door Limit Switch & Circuit Breaker (On/Off Switch)

.............................................. B-21

Contactor .................................. B-26

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

Table Of Contents

Relay.......................................... B-31

Transformer .............................. B-34

FOR USE BY MIDMARK TRAINED TECHNICIANS ONLY

Section C

WIRING DIAGRAMS

Section D

EXPLODED VIEWS / PARTS LISTS

Section E

Liquid Evacuation Pump

Section E

* Indicates multiple pages due to model / serial number break(s)

Fan..........................................B-37

Gauge ..................................... B-41

Motor ......................................B-43

Capacitor ................................B-44

Pump ......................................B-50

Liquid Evacuation Pump

(Accessory) ............................

Separator Tank ....................... B-58

Front Cover ............................ C-2

Top Cover ............................... C-3

Electrical Cover ...................... C-4

Back Cover (Previous Tank)... C-5

Back Cover (Large Tank) ........ C-6

PowerVac Liquid Evacuation Pump

(Accessory) ............................

PowerVac® Single Models

(P3, P5, P7) .............................

PowerVac ® Twin Models

(P6, P10, P14) .........................

(Accessory) ...........................

®

.................................................. D-2*

B-53

D-4

E-2*

E-3*

E-4*

Symbols

AA158000-1i

0

5

1

0

1

5 2

0

2

5

-

3

0

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Ordering Parts

WARNING

Indicates a potentially hazardous situation which

could result in serious injury if not avoided.

The following information is required when ordering parts:

• Serial number & model number

• Part number for desired part.

[Refer to Exploded Views / Parts Lists section]

CAUTION

Indicates a potentially hazardous situation which may result in minor or moderate injury if not avoided. It may also be used to alert against unsafe practices.

Equipment Alert

Indicates a potentially hazardous situation which

could result in equipment damage if not avoided.

In Section A, test the components in the order indicated. (ex.

1st

then,











The symbols below may be used in this manual to represent the operational status of table functions and components.

Refer to Section B for component testing procedures.

Indicates the function / component is working properly. No action required.

2nd

)







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

Model / Serial Number Location

Tank Serial

Number

General Information

Indicates the function / component is working, but a problem exists.

Indicates the function / component is not working at all.

Base Serial

Number

Rev 9/10/18

iii

General Information

Model

P3

Model

P5

Model

P7

Model

P6

Model

P10

Model

P14

Evacuation Control

Box (Optional)

Max Users

3-5 5-7 7-10 6-10 10-14 14-20

N/A

Vac Unit

H x W x D

26" x 19.5" x 18.5" 26" x 19.5" x 18.5" 26" x 19.5" x 18.5" 26" x 39" x 18.5" 26" x 39" x 18.5" 26" x 39" x 18.5"

N/A

Separator H x W x D

32" x 22" x 22" 32" x 22" x 22" 32" x 22" x 22" 32" x 22" x 22" 32" x 22" x 22" 32" x 22" x 22"

5" x 5.5" x 6"

Actual Weight (lbs)

Vac Unit - 355 Separator - 47

Vac Units - 710 Separators - 94

2

Total HP 222444N/A

Voltage 208 / 230 208 / 230 208 / 230 208 / 230 208 / 230 208 / 230 115 VAC

Amps 11.4 11.4 11.4 22.8 22.8 22.8 3

Hertz 60 60 60 60 60 60 60

Recommended

Breaker Size (Amps)

(Min. 20 Amp ea.)

30 30 30 2 x 30 2 x 30 2 x 30

15

Inlet Connection Size

(in.)

1 1/2" 1 1/2" 1 1/2" 2" 2" 2"

N/A

Fuses

1/8 A, 250V

Type T

1/8 A, 250V

Type T

1/8 A, 250V

Type T

1/8 A, 250V

Type T

1/8 A, 250V

Type T

1/8 A, 250V

Type T

1/4A, 250V, Type T

3A, 250V, Type T

Drain Connection Size

(in.)

1 1/2" 1 1/2" 1 1/2" 1 1/2" 1 1/2" 1 1/2"

N/A

Back

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Classifications: Class 1, Type B Applied Part

iv

Rev. 9/10/18

General Information

UL 60601-1

CAN/CSA 22.2,

#601.1-M90

VAC Amps Cycles (Hz)

P3

PowerVac® Dry Vacuum

System - Single - 3 - 5 User

V x x 230 11.4 60

P5

PowerVac® Dry Vacuum

System - Single - 5 - 7 User

V x x 230 11.4 60

P7

PowerVac® Dry Vacuum

System - Single - 7 - 10 User

V x x 230 11.4 60

P6

PowerVac® Dry Vacuum

System - Twin - 6 - 10 User

V x x 230 22.8 60

P10

PowerVac® Dry Vacuum

System -Twin - 10 - 14 User

V x x 230 22.8 60

P14

PowerVac® Dry Vacuum

System - Twin - 14 - 20 User

V x x 230 22.8 60

Complies To:

Model

Description

Serial Number

Prefix

Electrical Supply Requirements:

Back

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®

Rev 9/10/18

v

General Information

Back

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LIMITED WARRANTY

SCOPE OF WARRANTY

Midmark Corporation (“Midmark”) warrants to the original purchaser its new PowerVac® 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 installation for the original user, shall be five (5) years or 10,000 usage hours (whichever comes first) for all warranted products and components and ten (10) years or 20,000 usage hours (whichever comes first) for the pump only.

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”

manual and or PowerVac 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 consequential damages or delay, including, but not limited to, damages for loss of profits or loss of use.

®

Care Guide for this applicable product; (3) products considered to be of a consumable nature; (4) accessories or parts not

NO AUTHORIZATION

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

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.

vi

Troubleshooting

Go To Page:

Back

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5

1 0 2

0

1

5 2

5

0

3

0

Function / System Page

Vacuum System ................................... A-2

Electrical System Operation

Power to System......................... A-3

Wall Switch On ........................... A-4

Bottom Float Contact Closes ...... A-5

Middle Float Contact Closes ....... A-6

Top Float Contact Closes ........... A-7

Liquid Evacuation Pump.......................A-11

Models:

Serial Numbers:

AA220500

Section A

Rev 2/08

A-1

Troubleshooting

Back

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Vacuum System Operation

Operatory waste (air, solids and liquids) is pulled into the separator through the inlet hose by the rotary claw pump in the vacuum base unit.

Air is separated from liquids and solids. Air then flows into the pump and out through the exhaust hose.

Refer To: Page

Low or No Suction ................................ A-9

Earlier Version Shown

Fresh air is pumped in through the Vacuum Relief Valve to the pump and out through the exhaust. (When ports are opened in the operatories the VRV closes to compensate.)

The check valve connected below the drain port allows the unit to drain liquids and solids upon removal of vacuum from the chamber when the pump / motor shuts off.

The fan(s), hour meter and vacuum pump start to run when power is supplied by the wall switch. The fan(s) and hour meter then begin to cycle with the vacuum pump / motor. The float switches control the pump motor by a 24 vac relay via motor contactor.

The upper and lower reed switch floats interact as a latching circuit with the internal relay to release upon drain below the bottom float.

Air

Liquids

Fresh Air

Intake

Fr

A-2

Vacuum System

Rev 9/10

Models:

Serial Numbers:

All

Troubleshooting

Back

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Electrical System

(Power to System Wall Switch Open All Float Switches Open)

• Power (230 VAC) is on supplying Line Voltage to the Vacuum Pump Electrical System.

• 230 V is applied to the 230 V / 24 V Transformer energizing it.

• 24 V is applied from one side of Transformer, to the Terminal Block.

• From the Terminal Block, 24 V is applied to Terminal 6 of CR1 Relay, thru CR1 normally closed contacts (6 & 2) to one side of the coil on Contactor “C”, also to J1 & J2 Plug (pin 1), and thru the Timer to one side of the Wall On / Off Light.

• 24 V is also applied thru the closed Door Limit Switch,Circuit Breaker & Timer to one side of the Wall On/Off Switch.

VACUUM PUMP ELECTRICAL SYSTEM

Common

Top Float

Middle Float

Bottom Float

AA160800i

Top Float

3

Middle Float

4

2

1

Transformer

Fuse F1

BK

RD

WH

RD

BL

Energized

GN/YL

Circuit

Breaker

YL

Light

On

On/Off

Light

Remote

Wall

Switch

On

WH

Transformer

OR

230 VAC Power On

WH

RD

WH

BL

RD

WH

RD

BL

SEPARATOR FLOAT SWITCH ASSEMBLY

Earlier Version HasThree Reed Switch Floats. The Middle Float in Current Version is Not Used and No Longer Installed

Contacts

Open

Contacts

Open

Contacts

Open

Water Level

Water Low, All Float Switches Open

BL

WH

YL

OR

Jumper

Terminal

Block

BL

Refer To: Page

Motor will not Run ................................. A-10

Motor Cutting Out ................................. A-11

NOTE:

Some units have dual fans that are wired in parallel.

FAN

Fan

Off

RD

Contacts

RD

WH

BK

OR

RD

BL

WH

BL

RD

BL

WH

1

BL

WH

To J1 or J2 Plug on

Evacuation Board

Separation Tank

Open

WH

BK

BL

RD

2

RD BK

or

to Float on

CONTACTOR

"C"

Contacts

Open

Power Removed From

Coil, Contacts Open.

BL

WH

Coil

7

6

Coil

8

Coil

5

WH

BK

3

4

3

BK

RD

BK

CR1 (Float Switch) RELAY

Contacts Open

CR1 Coil Not Energized

Contacts Remain in

Same Position

BK

GN/YL

BL

RD

4

BL

2

3

BL

1

RD

NOTE:

Circuit Breaker &

BL

Door Limit Switch

Closed

Manual reset button on earlier versions, automatic reset on current versions.

RD

HOUR

METER

HOURS

BK BK

Thermal

Reset

Meter

Stopped

Pump

Stopped

AA2480i

Models:

Serial Numbers:

All

Power to System

Rev 11/2/15

A-3

Troubleshooting

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- continued (Wall Switch On, Power to System, All Float Switches Open)

• Remote Wall Switch is turned on, the On / Off Light comes on.

• 24 V is applied to the other side of the coil of Contactor “C”, energizing the coil and closing its contacts.

• The Fan(s), Hour Meter, and Vacuum Pump run.

Electrical System

- continued (Wall Switch OFF

,

Power to System, All Float Switches Open, Timer ON)

• Remote Wall Switch is turned off, the Timer turns on and starts to measure two hours.

• The Timer will run the Vacuum for one minute every two hours while the Remote Wall Switch is turned off by completing the 24 V circuit to the Contactor "C" coil.

VACUUM PUMP ELECTRICAL SYSTEM

SEPARATOR FLOAT

SWITCH ASSEMBLY

Earlier Version Shown

Earlier Version HasThree Reed Switch Floats. The Middle Float in Current Version is Not Used and No Longer Installed

Contacts

Open

Contacts

Open

Contacts

Open

Water Level

Water Low, All Float Switches Open

Top Float

Middle Float

Bottom Float

Common

Bottom Float

AA160800i

Top Float

3

Middle Float

4

2

1

Transformer

Energized

BL

YL

WH

BK

YL

GN/YL

WH

RD

BL

Circuit

Breaker

OR

Jumper

Terminal

Block

BL

RD

WH

RD

WH

Light

On

On/Off

Light

Remote

Wall

Switch

On

WH

Transformer

OR

Fuse F1

RD

230 VAC Power On

WH

RD

WH

BL

RD

WH

RD

BL

RD

WH

BK

OR

BL

WH

1

WH

To J1 or J2 Plug on

Evacuation Board

Separation Tank

Circuit Breaker &

BL

Door Limit Switch

Contacts

Closed

WH

BK

BL

RD

2

RD BK

or

to Float on

Closed

CONTACTOR

Contacts

BL

Coil

7

Coil

8

Coil

WH

BK

3

4

3

"C"

BK

RD

BK

Closed

Coil Energized

Contacts Closed

CR1 (Float Switch) RELAY

WH

Contacts Open

6

5

CR1 Coil Not Energized

Contacts Remain in

Same Position

NOTE:

Some units have dual fans that are wired in parallel.

FAN

Fan

On

BK

GN/YL

BL

RD

4

BL

2

3

BL

1

RD

BK BK

RD

HOUR

METER

HOURS

Thermal

Reset

Meter

Running

NOTE:

Manual reset button on earlier versions, automatic reset on current versions.

Pump

Running

AA2478i

Wall Switch On

A-4

Rev 11/2/15

Models:

Serial Numbers:

All

Troubleshooting

Back

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- continued (Water Rises, Bottom Float Switch Closes, Middle and Top Switches Remain Open.)

• Contactor “C” contacts remain closed.

• The Fan(s), Hour Meter, and Vacuum Pump continue to run.

SEPARATOR FLOAT SWITCH ASSEMBLY

Earlier Version Shown

Earlier Version HasThree Reed Switch Floats. The Middle Float in Current Version is Not Used and No Longer Installed

Contacts

Open

Contacts

Open

Contacts

Closed

Water Level

Bottom Float Switch Closed, Middle and Top Remain Open.

Top Float

Middle Float

Bottom Float

Common

Bottom Float

Top Float

AA160801i

3

Middle Float

Light

On

On/Off

Light

Remote

Wall

Switch

On

4

2

1

WH

RD

WH

BL

RD

WH

OR

230 VAC Power On

WH

RD

BL

Transformer

Fuse F1

BK

RD

GN/YL

WH

RD

BL

Breaker

NOTE:

Some units have dual fans that are wired in parallel.

VACUUM PUMP ELECTRICAL SYSTEM

Transformer

Energized

BL

YL

Circuit

WH

Terminal

Block

BL

OR

Jumper

WH

RD

Contacts

WH

BK

OR

RD

BL

WH

BL

RD

BL

WH

1

WH

To J1 or J2 Plug on

Evacuation Board

Separation Tank

Circuit Breaker &

BL

Door Limit Switch

Closed

Coil

BK

BL

RD

2

3

2

3

RD BK

or

to Float on

Closed

CONTACTOR

"C"

Contacts

Closed

Contacts Closed

BL

WH

7

6

Coil

8

Coil

5

WH

BK

4

Coil Energized

CR1 Coil Not Energized

FAN

Fan

On

BK

RD

BK

CR1 (Float Switch) RELAY

Contacts Open

Contacts Remain in

Same Position

RD

4

2

3

NOTE:

Manual reset button on earlier versions, automatic reset on current versions.

HOUR

METER

BK

BK BK

RD

BK

GN/YL

BL

RD

BL

1

RD

HOURS

Thermal

Reset

Meter

Running

Pump

Running

AA2478i

Models:

Serial Numbers:

All

Bottom Float

Switch Closed

Rev 11/2/15

A-5

Troubleshooting

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- continued (Water Reaches Middle Float, Middle and Bottom Float Switches are Closed, Top Switch Remains Open.)

• Contactor “C” contacts remain closed.

• The Fans, Hour Meter, and Vacuum Pump continue to run.

Top Float

Middle Float

Bottom Float

Common

AA160802i

Bottom Float

Top Float

4

3

Middle Float

1

2

Light

On

On/Off

Light

Remote

Wall

Switch

On

WH

RD

BL

RD

SEPARATOR FLOAT SWITCH ASSEMBLY

Earlier Version Shown

Earlier Version HasThree Reed Switch Floats. The Middle Float in Current Version is Not Used and No Longer Installed

Contacts

Open

Contacts

Closed

Water Level

Contacts

Closed

Middle and Bottom Float Switches are Closed, Top Remains Open.

NOTE:

Some units have dual fans that are wired in parallel.

Fan

On

FAN

HOUR

METER

BK

BK BK

RD

BK

GN/YL

BL

RD

4

BL

2

3

BL

1

RD

HOURS

Thermal

Reset

Meter

Running

Pump

Running

AA2478i

VACUUM PUMP ELECTRICAL SYSTEM

RD

WH

Transformer

Fuse F1

BK

RD

WH

RD

BL

Energized

YL

GN/YL

Circuit

Breaker

BL

WH

YL

OR

Jumper

Terminal

Block

BL

WH

Transformer

OR

230 VAC Power On

WH

BL

RD

WH

RD

BL

BK

OR

RD

BL

WH

BL

RD

BL

WH

1

WH

To J1 or J2 Plug on

Evacuation Board

Separation Tank

Circuit Breaker &

BL

Door Limit Switch

Contacts

Closed

WH

BK

BL

RD

2

RD BK

or

to Float on

Closed

CONTACTOR

Contacts

BL

Coil

7

Coil

8

Coil

WH

BK

3

4

3

"C"

BK

Closed

Coil Energized

Contacts Closed

CR1 (Float Switch) RELAY

WH

Contacts Open

6

5

CR1 Coil Not Energized

Contacts Remain in

Same Position

BK

RD

BK

NOTE:

Manual reset button on earlier versions, automatic reset on current versions.

A-6

Switch Closed

Middle Float

Rev 11/2/15

Models:

Serial Numbers:

All

Electrical System

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• The Top Float Switch sends 24v to the coil of CR1 Float Switch Relay changing the contacts position.

• Power is removed from the coil of Contactor “C”, opening its contacts.

• The Fan(s), Hour Meter, and Vacuum Pump stop running.

• CR1 Float Switch Relay remains energized through its own normally closed tips (6&4) and the bottom float swich (pin 3) of J1& J2

• The Collection tank starts to Drain, Pump remains off until Bottom Float Switch opens interupting 24v to the CR1 Float Switch Relay coil.

• CR1 Float Switch Relay returns to its nornal state energizing Contactor "C", the Vacuum Pump, Fan(s) Motors,

and Hour Meter restart .

SEPARATOR FLOAT

SWITCH ASSEMBLY

Earlier Version Shown

Earlier Version HasThree Reed Switch Floats. The Middle Float in Current Version is Not Used and No Longer Installed

Contacts

Closed

Water Level

Contacts

Closed

Contacts

Closed

All Float Switches are Closed.

Top Float

Middle Float

Bottom Float

AA160803i

Common

Bottom Float

Top Float

3

Middle Float

4

1

2

Light

On

On/Off

Light

Remote

Wall

Switch

On

VACUUM PUMP ELECTRICAL SYSTEM

RD

Contacts

RD

Open

WH

Transformer

Fuse F1

BK

RD

WH

RD

BL

GN/YL

Circuit

Breaker

Energized

BL

YL

WH

Terminal

Block

BL

OR

Jumper

WH

Transformer

OR

230 VAC Power On

WH

RD

WH

BL

RD

WH

RD

BL

BK

OR

RD

BL

WH

RD

BL

WH

1

BL

WH

To J1 or J2 Plug on

Evacuation Board

Separation Tank

Circuit Breaker &

BL

Door Limit Switch

WH

Closed

NOTE:

Some units have dual fans that are wired in parallel.

CONTACTOR

Contacts

Open

BL

Coil

BK

7

Coil

8

Coil

BL

WH

RD

BK

2

3

4

2

3

RD BK

or

to Float on

Fan

"C"

BK

RD

BK

Power Removed From

Coil, Contacts Open.

CR1 (Float Switch) RELAY

WH

Contacts Open

6

5

CR1 Coil

Energizes

Contacts Change

Positions

Troubleshooting

FAN

RD

HOUR

METER

HOURS

BK BK

Thermal

Reset

Meter Stops

Off

BK

GN/YL

BL

RD

4

BL

2

3

BL

1

RD

NOTE:

Manual reset button on earlier versions, automatic reset on current versions.

Pump Stops

AA2479i

Models:

Serial Numbers:

All

Top Float

Switch Closed

Rev 11/2/15

A-7

Troubleshooting

Back

Go To Table Of Contents

Vacuum System

Problem: Operatory has low or no suction.

Earlier Version Shown

Will the motor start?

If motor runs go to 2nd check. If not Refer to Section A - Motor will not run.

Check Belt Tension.

Refer to: Section B - Belt. (Earlier Version ONLY)

2nd







1st







Refer To: Page

Motor will not Run ................................. A-9

Belt ............................................... B-2

Check Valve ......................................... B-6

Vacuum Relief Valve ............................ B-9

Exhaust ............................................... B-12

Check Vacuum Relief Valve.

Refer to: Section B - Vacuum Relief Valve.

5th







A-8

with Motor Running

Check Hoses and Bulkhead Fittings.

Check for leaks, kinks and loose connections in the hoses, bulkhead fittings and separator lid gasket.

Check Exhaust.

Remove exhaust line to see if suction increases. Unclog or replace exhaust line if suction increased when checking.

Refer to: Section B - Exhaust

Low or No Suction

Rev 9/10/18

Models:

Serial Numbers:

3rd

All







6th







Earlier Version Shown

Check Drain Line for Suction.

Refer to: Section B - Check Valve.

4th







Troubleshooting

Back

Go To Table Of Contents

Vacuum System

Problem: Motor will not run.

Check Float.

Refer to: Section B - Float

6th







Is Pump locked up?

Refer to: Section B - Pump

Reset Thermal Overload.

Refer to: Section B - Motor

2nd







Refer To: Page

Door Limit Switch................................B-20

Float...................................................B-15

Pump .................................................B-49

Low Voltage .......................................... B-18

Motor ..................................................B-42

Contactor .............................................. B-25

Fuse .................................................. B-27

1st







Check Door Limit Switch.

Refer to: Section B - Door Limit Switch

Check Fuse.

Refer to: Section B - Fuse

Check Relay.

Refer to: Section B - Relay

Relay ................................................ B-30

3rd



5th

7th











Earlier Version Shown

Models:

Serial Numbers:

All

Check Low Voltage.

Refer to: Section B - Low Voltage

4th







Check Motor.

Refer to: Section B - Motor

Earlier Version Shown

Check Contactor.

Refer to: Section B - Contactor

9th







Motor Not Running

8th







Rev 9/10/18

A-9

Troubleshooting

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Vacuum System

Problem: Motor cutting out or running at a reduced speed.

RER

1st





4th







Check Equipment Room Temperature.

Temperature should be - 40° to 104° Fahrenheit

- 4 to 37 Celsius

Check Exhaust line and valve.

Refer to: Section B - Exhaust

Refer To: Page

Contactor .............................................. B-25

Pump ....................................................B-44

Exhaust ............................................... B-12

Motor ..................................................B-42

Check Contactor Voltage.

Refer to: Section B - Contactor

2nd







A-10

Motor Cutting Out

Rev 9/10/18

Models:

Serial Numbers:

All

Earlier Version Shown

Check Motor.

Refer to: Section B - Motor

Is Pump locked up?

Refer to: Section B - Pump

5th







3rd







AA158503i

HIGH VOLTAGE

LOW

VOLTAGE

K4

C1

115 VAC

J4

F3 FUSE

F2 FUSE

F1 FUSE

115 VAC

Supply

Neutral

(Blue)

Line

(Black)

J7

J6

BK

GN

RD

WH

POWER

ON

LIGHT

BL

WH

BK

BL

YL

BK

BR

GN/YL

WH

BK

BL

YL

GN/YL

Grd

J5

PLUG

4

1

2

3

4

3

2

1

K1

RELAY

VACUUM PUMP #1

Top Float Swt.

Bottom Float Swt.

RELAY

Contacts

Open

LED

OFF

RELAY

K2

K3

RELAY

Neutral

(Wht)

Line (Blk)

EVAC. PUMP

J8

J9

1

4

2

3

Middle

Float Swt.

Common

Top

Float Swt.

Bottom

Float Swt.

To

Separator

Float Assy.

1

4

2

3

BK

GN

RD

WH

Com.

Bottom

Middle

Top

WH

BK

RD

WH

BK

RD

J2

PLUG

2

3

1

4

2

3

BK

RD

WH

To Motor Control

(CR1 Relay)

System #2

(Same As

Above J1)

1

4

2

3

Coil (7)

N/O (4)

1

4

2

3

BK

RD

WH

To Motor Control

(CR1 Relay)

System #1

N/O

Com. (6)

WH

RD

BK

J3

Plug

1

2

J1

PLUG

2

3

1

Light

On

115 VAC

Power On

Transformer

Energized

24 VAC

On

115 VAC

Power On

Contacts

Closed

VACUUM PUMP #2

Contacts

Closed

FLOATS

Contacts

Closed

EVAC. PUMP

LED

ON

Evac.

Pump

Swt.

LED

ON

115 VAC

Power On

LIQUID

EVACUATION

PUMP

Pump

On

115 VAC

Power On

Electrical System for Accessory - Liquid Evacuation Pump

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The Liquid Evacuation Pump is an optional accessory for the PowerVac®.

• 115 VAC is applied to the 115V / 24V Transformer energizing it.

• 24 VAC is applied from one side of the Transformer to the J3 plug.

• When the water level reaches the

• When the water level reaches the Power is supplied to J8 and J9 terminals, energizing the Liquid Evacuation Pump.

NOTE:

The Liquid Evacuation Pump will continue to run until the water level drops below the contacts.

If the

Top

float closes, K1 relay contacts close, and its LED is on, a problem is occurring with the system. Check for a restriction in the lines, pump not functioning, or PC board problem.

Liquid Evacuation Pump Electrical System shown when the Bottom & Middle Float Switches are Closed and Pump is running.

Bottom

float switch, opening K3 & K4 relay

Bottom Middle

float switch, K3 relay contact closes.

float switch, K2 & K4 relay contact close.

(Liquid Evac Pump is Optional)

Optional Liquid Evac Pump Must use a Three Float Assembly

Troubleshooting

Refer To: Page

Evacuation Pump Will Not Run............. A-12

Pump Runs But Will Not Pump ............. A-13

Pump tripping Thermal Overload .......... A-14

Serial Numbers:

Models:

All

Liquid Evac Pump

Electrical

Rev 9/10/18

A-11

Troubleshooting

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Evacuation Pump System

Problem: Evacuation Pump will not run.

Check PC Board

Refer to: Section B - Liquid Evacuation Pump

Check Float Assembly

Refer to: Section B - Float Assembly

3rd







5th







Check Low Voltage to PC Board

Refer to: Section B - Liquid Evacuation Pump

Refer To: Page

Liquid Evacuation Pump

2nd







Check Supply Voltage to PC Board

Refer to: Section B - Liquid Evacuation Pump

Check Thermal Motor Protector

Refer to: Section B - Liquid Evacuation Pump

Check Supply Voltage ...............B-53-B-56

Check Low Voltage....................B-53-B56

Check Float Assembly....................... B-15

Check Thermal Motor Protector...B-53-B-56

Check PC Board........................B-53-B-56

Check Pump Motor....................B-53-B-56

1st







4th







Earlier Version Shown

A-12

Evacuation Pump

Will Not Run

Rev 9/10/18

Models:

Serial Numbers:

All

Earlier Version Shown

Check Pump Motor

Refer to: Section B - Liquid Evacuation Pump

6th







Troubleshooting

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Evacuation Pump System

Problem: Evacuation Pump runs but does not

remove liquid from Separator.

Check Supply Voltage to Pump

Supply voltage is low. Refer to: Section B - Liquid Evacuation Pump

2nd

Check for Obstructions in Outlet of Separator / Lines.

Refer to: Section B - Liquid Evacuation Pump

Check Pump Location

Pump should be positioned as close as possible below the separator.







Refer To: Page

Liquid Evacuation Pump..............B-53-B-56

4th







5th







Check Discharge Line from Pump

Do not run a discharge head of greater then 35 ft. (15 Psi).

Models:

Serial Numbers:

All

6th







Earlier Version Shown

Check Suction Line Into Pump

Check for leaks. Avoid "looping" suction pipe as it could trap air. Suction line should not be more than 6 ft. in length.

Check Evac. Pump Impeller for Obstructions or Damage.

Refer to: Section B - Liquid Evacuation Pump

Evacuation Pump Runs

but Will Not Pump

Rev 9/10/18

1st

3rd







A-13







Troubleshooting

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Evacuation Pump System

Problem: Evacuation Pump Motor keeps tripping

on Thermal Overload.

2nd





Check for Obstructions in Discharge Line from Pump

Refer to: Section B - Liquid Evacuation Pump



Check Ambient Temperature at Motor

Temperature should not exceed 104° F (40° C) around pump.

Check Supply Voltage to Pump

Supply voltage is low. Refer to: Section B - Liquid Evacuation Pump

6th







Check Pump Location

Pump should be positioned as close as possible below the separator. Suction line should not be more than 6 ft. in length.

Refer To: Page

Liquid Evacuation Pump ....................... B-52

1st







5th







Check Discharge Line from Pump

Do not run a discharge head of greater then 35 ft. (15 Psi).

Evacuation Pump Keeps

Tripping on Thermal

A-14

Protector

3rd







Rev 9/10/18

Models:

Serial Numbers:

Earlier Version Shown

All

Motor Thermal Protector Weak

Replace motor pump.

Check Evac. Pump Impeller for Obstructions or Damage.

Refer to: Section B - Liquid Evacuation Pump

7th

4th











Testing & Repair

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Testing & Repair

Components: Page

Belt ....................................................B-2

Check Valve ......................................... B-6

Vacuum Relief Valve ............................ B-9

Exhaust ............................................... B-12

Float ..................................................... B-16

Low Voltage .......................................... B-18

Door Limit Switch &

Circuit Breaker (On/Off Switch) ........... B-21

Contactor ............................................. B-26

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

Relay .................................................... B-31

Transformer ......................................... B-34

Fan ....................................................... B-37

Gauge ................................................... B-41

Motor .................................................... B-43

Pump .................................................... B-50

Liquid Evacuation Pump (Accessory) .. B-53

Separator Tank (Rinse)....................... B-58

Models:

Serial Numbers:

Section B

B-1

Testing & Repair

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Belt

Location & Function

The Belt runs on a motor pulley system operating the pump. Belt should never have nicks, cracks or any visible damage, this will affect performance.

Earlier versions of the PowerVac® the belt will need adjusting from time to time. Newer versions of the PowerVac® have an auto tensioner.

WARNING

Motors installed after 12/08 are thermally protected

with automatic reset. Unit may start without warning.

Motor Pulley

Refer to: Page

Belt Adjustment (Tension) .................... B-3

Belt Replacement (Earlier Version) ........ B-4

Belt Replacement (New Version) ........... B-5

B-2

Belt

Serial Numbers:

Rev 9/10/18

Models:

Belt

Pump Pulley

Earlier Version Shown

AA162300i

All

Testing & Repair

10

15

20

25

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Belt

Checking and Adjusting Belt Tension (Earlier Versions Only)

(Small End O-ring)

Large End

O-ring

12"

50

150

100

Check belt tension using belt tension checker...

A. Remove front cover. Refer to: Section C Front Cover. B. Position o-ring on large end of tension checker to 12” (use "Inches of Span Length" increments on checker). C. Slide o-ring on small shaft to 0 pounds. D. Align straight edge with belt. E. Apply force on the plunger until o-ring on large shaft is even with straight edge. F. Remove the tension checker and read the defection force the small o-ring was moved to.

Verify deflection reading is 7 lbs.

7 pounds

WARNING

Motors installed after 12/08 are thermally protected with automatic reset. Unit may start without warning.

15

10

25

20

30

I

f adjustment is needed... A. Loosen Motor Mount Bolt. B. Move adjustment nut clockwise to tighten belt. C. Move adjustment nut counter clockwise to loosen belt D. Use belt tension checker to recheck deflection reading. E. Tighten motor mount bolt. F. Replace front cover.

Refer to: Page

Belt Location and Function .................... B-2

Belt Replacement (Earlier Version) ........ B-4

Belt Replacement (New Version) ........... B-5

Front Cover ........................................... C-2

Motor Mount Bolt

ON

OFF

HOURS

AA168200i

Models:

Serial Numbers:

P3

0611P3P0000 to 0801P3P0611

V245092 to V317654

Straight Edge

If no adjustment is needed...

A. Tighten motor mount bolt. B. Replace front cover.

0611P5P0000 to 0801P5P0240

V245092 to V317641

P5

0611P7P0000 to 0712P7P0104

V245092 to V317634

P7

Adjustment Nut

Belt

Rev 9/10/18

B-3

Testing & Repair

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Belt

Replacement (Earlier Versions Only)

Caution

The On/Off switch controls only the secondary circuit power. The main power source must be turned off to remove all power in the control box.

WARNING

Motors installed after 12/08 are thermally protected

with automatic reset. Unit may start without warning.

Removal

Step 1: Disconnect power at on/off switch

and main power supply box.

Refer to: Page

Belt Location and Function .................... B-2

Belt Adjustment (Earlier Version) .......... B-3

Belt Replacement (New Version) ........... B-5

Front Cover ........................................... C-2

Removal

Step 2: Remove front cover.

Refer to: Section C - Front Cover

Motor Mount Bolt

Removal

Step 3: Loosen motor mount bolt

and adjustment bolt.

Removal

Step 4: Remove belt.

Installation

Step 5: Replace belt.

Installation

Step 6: Tighten adjustment bolt

and motor mount bolt.

Installation

Step 7: Set belt tension.

ON

OFF

HOURS

Refer to: Section B - Belt Adjustment

Installation

Step 8: Replace front cover.

B-4

Belt

Serial Numbers:

Rev 9/10/18

Models:

Adjustment Bolt

0611P3P0000 to 0801P3P0611

V245092 to V317654

P3

AA162700i

Installation

Step 9: Connect power.

0611P5P0000 to 0801P5P0240

V245092 to V317641

P5

0611P7P0000 to 0712P7P0104

V245092 to V317634

P7

Belt

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Replacement

with automatic reset. Unit may start without warning.

Step 1: Disconnect power at on/off switch

(Newer Versions Only)

Step 2: Remove front cover.

Refer to: Section C Front Cover

Step 3: Slightly push tension arm up toward the

pulley and remove belt with other hand.

WARNING

Motors installed after 12/08 are thermally protected

and main power supply box.

Testing & Repair

Refer to: Page

Belt Location and Function .................... B-2

Belt Adjustment (Earlier Version) .......... B-3

Belt Replacement (Earlier Version) ........ B-4

Front Cover ........................................... C-2

Models:

Serial Numbers:

P3

0802P3P0612 thru

Present

Tension Arm

Step 4: Slightly push tension arm up toward the

pulley and install new belt with other hand.

P5

0801P5P0241 thru

Present

P7

0712P7P0105 thru

Present

AA221600

All

V785000 thru

Present

Step 5: Replace front cover.

Belt

Rev 9/10/18

B-5

Testing & Repair

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Check Valve

Location and Function

The Check Valve located in the drain allows the separator to drain upon removal of vacuum pressure. When the pump is not running, the valve opens, allowing liquids to drain. If the pump is running the valve closes to keep air in the drain from back flushing into the system.

Each vacuum pump in a multiple pump installation requires a check valve to be installed into the intake line.

This prevents loss of suction pressure when one pump in the system is turned off. If no check valve is present, flow will be allowed through he "off" pump, creating a loss suction of the rest of the system.

Vacuum Pressure keeps Valve

Closed when Pump is Running

Refer to: Page

Check Valve Test ................................. B-7

Check Valve Replacement .................... B-8

Earlier Version Shown

Located at bottom

drain on all units

B-6

When Pump Stops Valve Opens

for Liquids and Solids to Drain

Check Valve

Serial Numbers:

Rev 9/10/18

Multiple Units have two additional check

valves, located in the Tee Assembly

Note: When installing check valve in horizontal position,

Models:

confirm the hinge for the flapper is on top of the valve.

All

Testing & Repair

AA163000i

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Check Valve

Testing

Equipment Room

Operatory

On / Off Switch

AA152901i

Step 2: Turn vacuum off and

ensure that water drains from separator.

Refer to: Page

Check Valve Location and Function ...... B-6

Check Valve Replacement .................... B-8

Step 3: Turn power off.

Step 4: Allow unit to drain completely.

Step 1: Vacuum 1-2 gallons of fresh

water into system through operatory lines.

Note: If water does not drain out, remove lid and see if valve is clogged.

Serial Numbers:

(If so flush and clean tank, if not replace valve.) If water drains out, continue with next test on step 3.

Models:

All

Earlier Version Shown

Step 6: Turn power on and place hand over end of drain hose.

Note: If you feel suction check valve is stuck, replace check valve.

If no suction is felt then check valve is good.

Step 5: Pull drain hose

Check Valve

out of drain.

Rev 9/10/18

B-7

Testing & Repair

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Check Valve

Replacement

Removal

Step 1: Turn power off.

All Units

Removal

Step 3: Unscrew check valve.

Check Valve

Drain Hose

Verify criteria of valve so the correct position is "up".

Installation

Step 5: Install drain hose to check valve.

Refer to: Page

Check Valve Location and Function ...... B-6

Check Valve Test ................................. B-7

Installation

Step 4: Install check valve.

Twin Units

Removal

Step 1: Turn power off.

Removal

Step 2: Remove drain hose

from check valve.

Removal

Step 3: Unscrew check valve.

Earlier Version Shown

Installation

Step 6: Turn power on and place hand over end of check valve.

Note: Verify you do NOT feel any suction.

B-8

AA162900i

Check Valve

Serial Numbers:

Rev 9/10/18

Removal

Step 2: Remove drain hose from check valve.

Models:

All

Twin Unit Tee Assembly Check Valves

Installation

Step 4: Install check valve.

Installation

Step 5: Install drain hose to check valve.

Testing & Repair

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Vacuum Relief Valve

Location and Function

The Vacuum Relief Valve regulates the vacuum pressure in the PowerVac .

The Vacuum Relief Valve has a 1" NPT male fitting on one side and 1" NPT female fitting on the other side.

The valve is adjustable up to 18"Hg. Recommended range for the system vacuum is from 10" to 18"Hg. The valve is preset at the factory for 12" Hg.

The Vacuum Relief Valve is located on top of the separator tank in the "T" Fitting on Single Models and in the center of the mounted "T" assembly on the Twin Models.

®

Twin Unit Location

Refer to: Page

VRV Adjustment ................................... B-10

VRV Replacement ................................ B-11

Single Unit Location

Models:

Serial Numbers:

All

Earlier Version Shown

Vacuum Relief Valve

Rev 9/10/18

B-9

Testing & Repair

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Vacuum Relief Valve

Adjustment

Step 1: Turn power off.

Single Unit Location

0

2

5

2

0

3

-

Step 2: Remove the filter and valve by unscrewing from tee-fitting.

Filter

Valve

5

1

0 1

5

0

Step 3: Adjust the center mounted screw inside the valve.

Twin Unit Location

Refer to: Page

VRV Location and Function................... B-9

VRV Replacement ................................ B-11

Note: Use 1/4 inch nutdriver and phillips screwdriver.

Each full clockwise turn increases the vacuum level by approximately 2 inch Hg.

Vacuum Relief Valve

B-10

AA163100i

Earlier Version Shown

Rev 9/10/18

Models:

Serial Numbers:

Step 4: Install filter and valve.

Note: Recommended Range is 10” Hg - 18 Hg.

Vacuum is preset at 12” Hg. If reading is low check for leaks or open operatory lines.

All

Midmark PowerVac P3, PowerVac P5, PowerVac P7, PowerVac P14, PowerVac P6 Parts Manual

Specifications and Main Features

Frequently Asked Questions

User Manual