Envirco MAC 10 User Manual

*** READ AND SAVE THESE INSTRUCTIONS ***

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MAC 10 Original VE5 FAN FILTER

MODULE

INSTALLATION AND SERVICE MANUAL

STANDARD, RSR, RSRE MODELS

Mac 10 and VE5 are registered Trademarks of the
Envirco Corporation, Sanford, North Carolina, U.S.A.

US Patents 4,560,395 and 5,470,363 Other patents issued and pending in foreign countries

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Updated 9/09

Critical operation conditions of the MAC 10

1. Touching of the HEPA filter could damage it, voiding the warranty on the
filter. The screen is only to protect against an accidental ‘touch’ of the
filter. Never place a hand or tool on the filter. Never lie filter face flat
down on a surface always have filter on its side or back to protect from
damage.

2. Prior to powering the unit, verify that the unit has been plugged into the
correct voltage. The serial number label on the top of the Mac 10 unit
has the required voltage.

3. For reorder prepossess the Mac 10 part number and serial number
should be recorded. This information is located on the serial number
label, located adjacent to the electrical box. If you can’t located the Sales
Order Number please contact Envirco for this information.

Part Numbers Covered by this Manual

11111-XXX Mac 10 Original 2x4 Standard Filter
11112-XXX Mac 10 Original 2x3 ½ Standard Filter
11113-XXX Mac 10 Original 2x3 Standard Filter
11114-XXX Mac 10 Original 2x2 Standard Filter
11115-XXX Mac 10 Original 2x4 RSR Filter Sheet Metal Housing
11116-XXX Mac 10 Original 2x3 ½ RSR Filter Sheet Metal Housing
11117-XXX Mac 10 Original 2x3 RSR Filter Sheet Metal Housing
11118-XXX Mac 10 Original 2x2 RSR Filter Sheet Metal Housing
11157-XXX Mac 10 Original 2x4 RSR Filter Extrusion Housing
11171-XXX Mac 10 Original 2x3 ½ RSR Filter Extrusion Housing
11169-XXX Mac 10 Original 2x3 RSR Filter Extrusion Housing
11170-XXX Mac 10 Original 2x2 RSR Filter Extrusion Housing

Note: A ‘Z’ in the part number indicates that the unit is special. This may
indicate a size change from standard or a special filter. Please contact
the factory for part numbers if this is the situation.

MAC 10 ORIGINAL VE5 SERVICE MANUAL

PAGE 1

READ AND SAVE THESE INSTRUCTIONS

WARNING!

TO REDUCE THE RISK OF FIRE, ELECTRICAL SHOCK, OR INJURY TO PERSONS,

OBSERVE THE FOLLOWING :

A. Installation work and electrical wiring must be done by qualified person(s) in

accordance with all applicable codes and standards, including fire-rated
construction.

B. When cutting or drilling into wall or ceiling, do not damage electrical wiring and other

hidden utilities.

C. If this unit is to be installed over a tub or shower, it must be marked as appropriate

for the application.

D. Use this unit only in the manner intended by the manufacturer. If you have any

questions, contact the manufacturer:

ENVIRCO CORPORATION
2809E Broadbent Parkway N.E.
Albuquerque, New Mexico 87107, U.S.A.
Tel: [phone]
Tel: [phone]
Fax: [phone]
Email: [email protected]

ASIAN SALES
No. 205, Lane 218 Zhubo Road
Qingpu District
Shanghai 201700
PRC
Tel: [phone]
Fax:[phone]

TRION-ENVIRCO
European Operations
The Cavendish Center Winnall Close
Winchester Hampshire
S023 OLD, UK
Tel: [phone]
Fax: [phone]

E. Before servicing or cleaning unit, switch power off at service panel and lock service

panel to prevent power from being switched on accidentally.

MAC 10 ORIGINAL VE5 SERVICE MANUAL

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Table of Contents

Title Page

1 INSTALLATION............................................................................................ 5

FIGURE 1 – UNIT UNCRATING............................................................................. 5

2 SERVICE: CLEANING THE MAC 10 VE5 PREFILTER............................. 6

FIGURE 2 – PREFILTER CLEANING..................................................................... 6

3 SERVICE: REMOVAL AND REPLACEMENT OF THE HEPA/ULPA

FILTER (STANDARD UNIT)............................................................................... 7

FIGURE 3 – STANDARD FILTER REPLACEMENT................................................. 7

4 SERVICE: REMOVAL AND INSTALLATION OF THE ROOM SIDE
REPLACEABLE GEL SEAL FILTER – EXTRUSION HOUSING (RSR/RSRE). 8

FIGURE 4 – RSR EXTRUSION FILTER REPLACEMENT........................................ 9

5 SERVICE: REMOVAL AND INSTALLATION OF THE ROOM SIDE
REPLACEABLE GEL SEAL FILTER – SHEET METAL HOUSING (RSR/RSRE)
10

FIGURE 5 – RSR SHEET METAL FILTER REPLACEMENT .................................. 11

6 SERVICE: REMOVAL AND INSTALLATION OF THE MOTOR

(STANDARD AND RSR MODELS).................................................................. 12

FIGURE 5 – MOTOR REPLACMENT ................................................................... 13

7 SERVICE: REMOVAL AND INSTALLATION OF THE RSRE MOTOR... 14

FIGURE 6 – RSRE MOTOR REPLACEMENT....................................................... 15

8 ON/OFF SWITCH - SPEED/AIRFLOW ADJUSTMENT............................. 16

MAC 10 ORIGINAL VE5 SERVICE MANUAL

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FIGURE 7 – 3 SPEED SWITCH ADJUSTMENT.................................................... 16

FIGURE 8 - SPEED CONTROL ADJUSTMENT .................................................... 16

9 TROUBLE SHOOTING: ............................................................................. 17

10 MAC 10 VE5 WIRING DIAGRAMS ......................................................... 18

FIGURE 9 – WIRING DIAGRAM 3- SPEED .......................................................... 18

FIGURE 10 – WIRING DIAGRAM SPEED CONTROL ........................................... 18

11 MAC 10 VE5 REPLACEMENT PARTS LIST:......................................... 19

12 WARRANTY............................................................................................ 21

13 TESTING ................................................................................................. 21

FIGURE 11- VELGRID TESTING......................................................................... 22

MAC 10 ORIGINAL VE5 SERVICE MANUAL

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1 INSTALLATION

Note: The MAC 10 3- SpeedVE5 Fan Filter Unit is completely assembled at the

factory with the exception of the optional ¼” (0.64 cm)-20 eyebolts, which can
be used when hanging the unit from an overhead structure.

Step 1. Carefully remove the unit from the shipping carton and inspect for any damage

that may have occurred during transportation. (See Figure 1)

Step 2. Wipe down plastic bag and move unit into clean room. (Double bagging is

available upon request.)

Step 3. If using rigidly supported grid (usually 2” or wider), raise unit through ceiling and

lower onto the gasketed grid. If using a flexible grid (typically supported with
wires) the unit must be secured to an overhead structure with eyebolts, s-hooks
and chain. A roll of high-density gasket has been provided for use with
ungasketed grids. Note: special size units are available to fit specific clean
room grid systems.

Step 4. Have an electrician wire the unit to the appropriate voltage (115V, 220V, 277V

AC), according to the wiring diagram in section IX and local electric codes. If
optional power cord was purchased, plug unit into a grounded receptacle.

Figure 1 – Unit Uncrating

MAC 10 ORIGINAL VE5 SERVICE MANUAL

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2 SERVICE: Cleaning the MAC 10 VE5 Prefilter

WARNING!

Disconnect the unit from the electrical power source before attempting any

service.

Tools Required: None

Note: To keep the filter in top operating condition, washing the foam prefilter is
recommended every three to six months.

Step 1. To gain access to the prefilter, remove the ceiling panel next to the unit, if

applicable.

Step 2. Switch the ON-OFF switch to the off position.
Step 3. Remove the prefilter from the snap-in frame. (See Figure 2)
Step 4. Clean the prefilter by hand washing in water with a mild detergent or by using a

vacuum cleaner. Allow prefilter to dry completely before replacing.

Step 5. Reassemble by reversing the above steps.

ON/OFF Switch

Figure 2 – Prefilter Cleaning

MAC 10 ORIGINAL VE5 SERVICE MANUAL

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3 SERVICE: Removal and Replacement of the HEPA/ULPA

Prefilter

Filter

Filter (Standard Unit)

WARNING!

Disconnect the unit from the electrical power source before attempting any

service.

WARNING!

The Standard Filter is protected with an expanded metal face screen. This is

never to be used to handle the filter. It is only for protection against an accidental

touch of the filter. Only handle the filter by the frame.
Tools Required: Phillips Head Driver
Step 1. Remove unit from ceiling.
Step 2. Remove the 10 screws holding the HEPA/ULPA filter to the lid assembly.
Step 3. Lift the lid assembly off the HEPA/ULPA filter (see Figure 3). Discard the used

filter as per requirements of the applicable regulations.

Note: Before replacing with a new HEPA/ULPA filter, carefully inspect the new filter for

any visible damage. Also inspect the gasket in the “tee” bar to insure a tight seal.
Replace as necessary.

Step 4. Replace with the new HEPA/ULPA filter and assemble by reversing the above

steps.

Lid Assembly

HEPA/ULPA

Figure 3 – Standard Filter Replacement

MAC 10 ORIGINAL VE5 SERVICE MANUAL

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4 SERVICE: Removal and Installation of the Room Side

Replaceable Gel Seal Filter – Extrusion Housing (RSR/RSRE)

WARNING!

Disconnect the unit from the electrical power source before attempting any

service.

WARNING!

The RSR Filter is protected with an expanded metal face screen. This is never to

be used to handle the filter. It is only for protection against an accidental touch of

the filter. Only handle the filter by the frame.

Tools Required: 5/32” hex head wrench
Manpower Required: 2

Step 1. Remove the diffuser screen by removing the four M5x35 socket head screws

securing the screen to the filter. (Figure 4)

Step 2. Loosen the six M5x16 socket head screws far enough to rotate the filter clip

180°. The filter will not drop during this operation. Using the clips as handles,
slowly pull the filter away from the knife-edge seal. It is important to pull the
filter slowly away from the seal, so that the gel remains in the filter gel track.

Step 3. Inspect filter for visible damage, if damaged set aside for replacement or repair.
Step 4. Inspect the gel seal, if reinstalling the removed filter. Determine if the gel has

lost its ability to seal, if so repair the gel.

Step 5. Place the filter against the filter-sealing surface of the RSR unit. Install filter

clips and screws. The clips can be rotated and angled into place. Using the
clips as a lever the filter can be seated. It is recommended to work either
clockwise or counter clock wise around the filter, raise the filter into the gel.

Step 6. Reinstall screen.

MAC 10 ORIGINAL VE5 SERVICE MANUAL

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Plenum

Anodized

Housing­Extrusion

Filter­Gel Seal

Perforated
Screen

Plenum

Knife-

Housing

edge
Seal

Filter

Gel
Track

Filter
Clip

Perforated
Screen

M5x35

.

M5x16
Cap
Screw

Cap
Screw

Figure 4 – RSR Extrusion Filter Replacement

MAC 10 ORIGINAL VE5 SERVICE MANUAL

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5 SERVICE: Removal and Installation of the Room Side

Replaceable Gel Seal Filter – Sheet Metal Housing
(RSR/RSRE)

WARNING!

Disconnect the unit from the electrical power source before attempting any

service.

WARNING!

The RSR Filter is protected with an expanded metal face screen. This is never to

be used to handle the filter. It is only for protection against an accidental touch of

the filter. Only handle the filter by the frame.

Step 1. Remove the diffuser screen by shifting it to one side and lowering it out of the

housing.

Step 2. Loosen the six M5x16 socket head screws far enough to rotate the filter clip

180°. The filter will not drop during this operation. Using the clips as handles,
slowly pull the filter away from the knife-edge seal. It is important to pull the
filter slowly away from the seal, so that the gel remains in the filter gel track.

Step 3. Inspect filter for visible damage, if damaged set aside for replacement or repair.

Step 4. Inspect the gel seal, if reinstalling the removed filter. Determine if the gel has

lost its ability to seal, if so repair the gel.

Step 5. Place the filter against the filter-sealing surface of the RSR unit. Install filter

clips and screws. The clips can be rotated and angled into place. Using the
clips as a lever the filter can be seated. It is recommended to work either
clockwise or counter clock wise around the filter, raise the filter into the gel.

Step 6. Reinstall screen.

MAC 10 ORIGINAL VE5 SERVICE MANUAL

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Screw

Knife­edge
Seal

Fan Filter Unit

RSR Gel
Seal Filter

Filter Clip and

Diffuser Screen

Filter

Gel
Track

2-Piece
Plenum Housing

Perforated
Screen

Filter
Clip

M5x16
Cap
Screw

¼ -20
Cap
Screw

Figure 5 – RSR Sheet Metal Filter Replacement

MAC 10 ORIGINAL VE5 SERVICE MANUAL

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6 SERVICE: Removal and Installation of the Motor (Standard

and RSR models)

WARNING!

Disconnect the unit from the electrical power source before attempting any

service.

WARNING!

Electrical service should be performed by licensed electricians or authorized

ENVIRCO service technicians.

Tools Required: Phillips Head Driver
3/8” (10mm) Hex Head Wrench
Pliers

5/32”(0.40 cm) Allen wrench

Step 1. To gain access to the motor, remove the ceiling panel next to the unit, if

applicable.

Step 2. Switch the ON-OFF switch to the off position.
Step 3. Remove the prefilter off the prefilter frame. (See Section II)
Step 4. Loosen the electrical box cover screws (2), and slide/lift off cover. (Figure 5)
Step 5. Make note of all wire locations for reinstallation later.
Step 6. Disconnect the two brown wires from the capacitor, using a pair of pliers.
Step 7. Disconnect the motor wiring from the rotary switch and rocker switch or speed

control and rocker switch and remove the grommet from the motor leads. Save
this grommet for reinstallation.

Step 8. Remove the six screws to free the venturi ring and remove the motor/blower

assembly from the lid assembly. If using power drivers, set the unit to a low
torque setting to avoid stripping the sheet metal screws. (See Figure 6)

Step 9. Using a 5/32”(0.40 cm) Allen wrench remove the blower wheel from the motor

shaft. Remove motor from the venturi ring using a hex wrench.

Step 10. Replace with the new motor and reassemble by reversing the above steps. Set

the spacing between the venturi ring and the blower wheel at 0.06”(0.15 cm)
clearance.

MAC 10 ORIGINAL VE5 SERVICE MANUAL

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Prefilter

Motor

Venturi Ring

Blower Wheel

Disconnect motor leads from
capacitor, ON/OFF switch, and
three-speed switch or speed control.

Figure 6 – Motor Replacement

MAC 10 ORIGINAL VE5 SERVICE MANUAL

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7 SERVICE: Removal and Installation of the RSRE Motor

WARNING!

Disconnect the unit from the electrical power source before attempting any

service.

WARNING!

Electrical service should be performed by licensed electricians or authorized

ENVIRCO service technicians.
Step 1. To gain access to the motor, remove the gel seal filter (see Section III).
Step 2. While supporting the baffle assembly from below, remove the four corner

screws on the baffle assembly and lower the assembly. (See Figure 7)

Step 3. Prior to removing motor/blower assembly, remove electrical box cover (located

underneath the lid panel) to expose motor connectors. Disconnect the nine pin
connector from it’s mate in the prefilter bracket.

Step 4. While supporting the motor/blower assembly from below, remove the six

machine screws that secure the venturi ring to the bottom face of the lid.

Step 5. Using a 5/32”(0.40 cm) Allen wrench, remove the blower wheel from the motor

shaft. Remove motor from the venturi ring by removing the three # 10 bolts.

Step 6. Before removal of the motor mount bracket, measure the precise location of

the bracket on the motor. Remove the bracket.

Step 7. Replace with the new motor and reassemble by reversing the above steps. Set

the location of the motor mount bracket as measured (see above Step 6). Set
the spacing between the venturi ring and the blower wheel at 0.06”(0.15 cm)
clearance. When reinstalling the motor plate, align the plate to insure that the
leads will reach the electrical box.

MAC 10 ORIGINAL VE5 SERVICE MANUAL

PAGE 14

Electrical connectors

located in inner

prefilter wall

Gel Seal Filter

Motor/Blower

Assy

Blower

Wheel

Venturi

Plenum

Baffle Assembly

Screen

Figure 7 – RSRE Motor Replacement

Grommet

Machine Screw
and washer

Motor

Ring

Wellnut

MAC 10 ORIGINAL VE5 SERVICE MANUAL

PAGE 15

8 ON/OFF Switch - Speed/Airflow Adjustment

All MAC 10 units are equipped with a three-position rotary switch, which is located on
the side of the electrical box. (See Figure 8)

Recommended fan speed during initial start-up and operation is the “LOW” speed. As
airflow eventually decreases due to filter loading, fan speed may be increased by
moving the rocker switch to the top or “MEDIUM” position, and finally to the “HIGH”
position. Periodic airflow velocity readings (Per I.E.S. Specifications) should be
conducted to determine the filter condition and appropriate fan speed setting.

ON/OFF Switch Electrical Entrance 3-Speed Switch

Figure 8 – 3 Speed Switch Adjustment

Optional Speed Control

Units furnished with the optional speed control (the speed control is standard with 2x2
and 2x3 units) enable adjustment of airflow at any setting within the recommended
performance range. The speed control knob is located on the side of the electrical box,
adjacent to the on/off switch.

ON/OFF Switch Electrical Entrance Speed Control

Figure 9 - Speed Control Adjustment

Airflow/speed is adjusted by rotating the knob (See Figure 9):
Clockwise à Lowers the speed
Counter-Clockwise à Increases the speed
Fully rotating the speed control knob to the left or counter-clockwise will turn the unit off.

Note : When turning the unit “ON” from the “OFF” position of the speed control, the fan
is at the highest speed. Turning the speed control knob clockwise will lower the airflow.

MAC 10 ORIGINAL VE5 SERVICE MANUAL

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9 Trouble Shooting:

Low Air Velocity
Step 1. Check prefilter media; replace or clean as necessary.
Step 2. Flip switch from “Low” to “Medium” or “Medium” to “High” on units with 3-speed

switch.

Step 3. Adjust variable speed control (only units with optional Speed Control) for higher

blower output.

Step 4. Check power supply for proper voltage, amperage and distribution frequency.
Step 5. Replace HEPA/ULPA filter if the air velocity remains low.

High Air Velocity

Step 1. Flip switch from “HIGH” to “MEDUIM” to “LOW” on units with 3-speed switch.

Step 2. Adjust variable speed control (only units with optional Speed Control) for lower

blower output.

Non-Laminar Flow and/or Excessive Contamination
Step 1. Insure that no large obstructions are upstream of airflow pattern.

Step 2. Determine that no other air-moving devices are operating in or around clean

room which disrupt room’s airflow pattern.

Step 3. Check air velocity and if low, conduct the “Low Air Velocity” procedure outlined

above.

Step 4. Conduct smoke and photometer test on HEPA filter. Seal or replace HEPA filter

as necessary.

MAC 10 ORIGINAL VE5 SERVICE MANUAL

PAGE 17

10 MAC 10 VE5 Wiring Diagrams

Mac 10 Original Three Speed Wiring Diagram

Figure 10 – Wiring Diagram 3- Speed

Mac 10 Original Speed Control Wiring Diagram

Figure 11 – Wiring Diagram Speed Control

MAC 10 ORIGINAL VE5 SERVICE MANUAL

PAGE 18

11 MAC 10 VE5 Replacement Parts List:

Description Quantity ENVIRCO Part Number

per unit 115V 220V 277V

________________________________60 Hz___50 - 60 Hz______60 Hz_______
Prefilter 1 62981-001 62981-001 62981-001

Motor 1 63764-001 63764-002 63764-003
Capacitor 1 61485 61485 61485
ON/OFF Switch 1 63739 63739 63739
Speed Control (Optional) 1 63011 63015 63016
(CE Marked) 63742
Pressure Switch (Optional) 63415 63415 63415
Transformer (Optional) 63667 63666 63665
Current Sensor (Optional) 24235-001 24235-001 24235-001
Power cord (Optional) 63042-001 63042-004 63042-013
Standard Filter:
2’ x 2’ 1 69514-004 69514-018 23.63x23.63x9.125
2’ x 3’ 1 69514-019 69514-012 23.63x35.63x9.125
2’ x 3.5’ 1 69514-020 69514-021 23.63x41.63x9.125
2’ x 4’ 1 69514-006 69514-007 23.63x47.63x9.125
RSR Filter – Extrusion Housing:1 HEPA ULPA (Optional) Actual Filter Dim
2’ x 2’ 1 69563-005 69563-004 22.00x22.00x3.63
2’ x 3’ 1 69563-006 69563-007 22.00x34.00x3.63
2’ x 3.5’ 1 69563-008 69563-009 22.00x40.00x3.63
2’ x 4’ 1 69563-001 69563-003 22.00x46.00x3.63
RSR Filter – Sheet Metal Housing:1 HEPA ULPA (Optional) Actual Filter Dim
2’ x 2’ 1 93997-005 93997-004 21.00x21.00x3.55
2’ x 3’ 1 93997-006 93997-007 21.00x33.00x3.55
2’ x 3.5’ 1 93997-008 93997-009 21.00x39.00x3.55
2’ x 4’ 1 93997-001 93997-003 21.00x45.00x3.55
1: All filter part numbers are based on the standard Mac 10 sizes (2x4 – 23.63x47.63,
2x3 ½ -23.63x 41.63, 2x3 – 23.63x35.63, and 2x2 – 23.63x23.63). If the unit in question
is not this size or the part number includes a “Z” contact the factory for replacement filter
information.

1

HEPA ULPA (Optional) Actual Filter Dim

MAC 10 ORIGINAL VE5 SERVICE MANUAL

PAGE 19

Optional Accessories:

Fluorescent lighting
Ionizing bar
Solid-state speed control on 2x4, and 2x3

1

/2 units - (standard on all other sizes)
12”(30.48 cm) diameter A/C intake collar
Gasket Seal Filter (RSR unit only)
ULPA Filter (Standard and RSR)

Replacement parts are available through your authorized ENVIRCO representative. If
you cannot locate a representative in your area, contact our Parts Department at:

ENVIRCO

101 McNeill Road
Sanford, NC 27330
Tel: [phone]
Tel: [phone]
Fax: [phone]
Email: [email protected]

MAC 10 ORIGINAL VE5 SERVICE MANUAL

PAGE 20

12 Warranty

LIMITED WARRANTY: Unless otherwise expressly stated in Envirco’s published
specifications for the Goods, Envirco warrants that that Goods are free from defects in
material and workmanship, except for services which are warranted to be performed in a
competent and diligent manner in accordance with any mutually agreed specifications.
The foregoing warranty shall apply for eighteen (18) months from the date of shipment
from Envirco’s facility, except for services for which the warranty shall apply for ninety
(90) days from the date of performance (the “Warranty Period”). Provided Buyer
informs Envirco in writing of any breach of
applicable Warranty Period, Envirco shall, as its sole obligation and Buyer’s sole and
exclusive remedy for any breach of this warranty, repair or replace/reperform the Goods
which gave rise to the breach or, at Envirco’ option, refund the amounts paid by Buyer
for the Goods which gave rise to the breach. Any repair, replacement or reperformance
by Envirco hereunder shall not extend the applicable Warranty Period. The parties shall
mutually agree on the specifications of any test to determine the presence of a defect.
Unless otherwise agreed upon by Envirco in writing, Buyer shall bear the costs of access,
de-installation, re-installation and transportation of Goods to Envirco and back to Buyer.
These warranties and remedies are conditioned upon (a) the proper storage, installation,
operation, and maintenance of

the Goods and conformance with the proper operation
instruction manuals provided by Envirco or its suppliers or subcontractors, (b) Buyer
keeping proper records of operation and maintenance during the applicable Warranty
Period and providing Envirco access to those records, and (c) modification or repair of
the Goods only as authorized by Envirco. Envirco does not warrant the Goods or any
repaired or replacement parts against normal wear and tear or damage caused by misuse,
accident, or use against the instructions of Envirco. Any modification or repair of any of
the Goods not authorized by Envirco shall render the warranty null and void. EXCEPT
AS EXPRESSLY SET FORTH HEREIN, ENVIRCO MAKES NO OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
ANY IMPLIED WARRANTIES OF MERCHANTABILITY, NON-INFRINGEMENT
OR FITNESS FOR A PARTICULAR PURPOSE WHICH ARE HEREBY
DISCLAIMED TO

THE EXTENT PERMITTED BY APPLICABLE LAW.

warranty prior to the expiration of the

13 TESTING

Each MAC 10 VE5 filter unit is thoroughly tested at the factory before shipment.
However, because of the “rigors” of shipping, ENVIRCO encourages its re-test after
installation.

ENVIRCO recommends that the customer contact an independent organization, with
technicians trained and experienced in performance evaluation and maintenance of
clean air equipment.

MAC 10 ORIGINAL VE5 SERVICE MANUAL

PAGE 21

Some of the testing procedures performed on the MAC 10 VE5 include PSL challenge
of HEPA/ULPA filters to assure specified performance, along with air velocity
measurement and adjustment tests. No DOP is used on Mac 10 Filters, unless
requested.

Recommended Testing

All units that are airflow tested at Envirco are tested using a Shortridge Airdata
Multimeter 800 series with a Velgrid head. The recommended method of

reading is to place one corner of the Velgrid head 1-1/4” from the corner of the
filter face and then take four reading evenly spaced along the four foot side, then
repeat these reads for the other long side. This gives a total of eight reading to

test the unit. All advertised data is based on using the Velgrid with eight
readings (128 velocity points). Envirco recognized using eight reading during a
cleanroom start-up may be time consuming and recommends using three Velgrid
readings taken on a diagonal, as shown below.

Recommended Testing – 8 readings with a Velgrid

Factory Approved Testing – 3 readings with a Velgrid

Figure 12- Velgrid Testing

MAC 10 ORIGINAL VE5 SERVICE MANUAL

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