protech 84-25052-07 1400 CFM, 84-25052-08 2000 CFM, 84-25052-09 1400 CFM Operation Manual

Warranty

26

Duct Mount
Electronic Air Cleaner

CAUTION:
READ INSTALLATION, OPERATION, AND MAINTENANCE

INSTRUCTIONS CAREFULLY FOR SAFE OPERATION.
EXERCISE EXTREME CAUTION WHEN WORKING WITH

ELECTRICITY.

Maintenance • Operation • Installation • Warranty

84-25052-07 1400 CFM

84-25052-08 2000 CFM

84-25052-09 1400 CFM

Limited Warranty

This product comes with a two (2) year limited warranty on parts. The warranty provides that
a replacement will be furnished for any part of the product that fails in normal use and service
during the applicable warranty period specified, in accordance with the warranty’s terms. The
replacement part is warranted for only the unexpired portion of the original warranty.

All parts are warranted for a period of TWO (2) YEARS after the effective date. The effective
date is the date of installation if properly documented. Otherwise, it is the date of
manufacture plus twenty four (24) months.

STANDARD PROVISIONS AND CONDITIONS

The following terms are common to all of PROSTOCK’S individual product warranties.

THIS WARRANTY WILL NOT APPLY: a) to defects or malfunctions resulting from failure to
properly install, operate or maintain the unit in accordance with the manufacturer’s printed
instructions; b) to damage from abuse, accident, fire, flood, and the like; c) to parts used in
connection with normal maintenance, such as cleaning or replacing air filters; d) to units that
are not installed in the United States of America or Canada; e) to units that are not installed
in accordance with applicable local codes, ordinances and good trade practices; or f) to defects
or damage caused by the use of any attachment, accessory or component not authorized by
PROSTOCK.

SHIPPING COSTS: You will be responsible for the cost of shipping warranty replacement parts
from our factory to our PROSTOCK distributor and from the distributor to the location of your
product. You also are responsible for any shipping cost of returning the failed part to the
distributor. (If in Alaska, Hawaii, or Canada, you also must pay the shipping cost of returning
the failed part to the port of entry into the continental U.S.)

SERVICE LABOR RESPONSIBILITY: This Warranty does not cover any labor expenses for service,
nor for removing or reinstalling parts. All such expenses are your responsibility, unless a service
labor agreement exists between you and your contractor.

HOW TO OBTAIN WARRANTY PERFORMANCE: You must promptly report any failure covered
by this warranty to the installing contractor or distributor. Normally, the installing contractor
from whom the unit was purchased will be able to take the necessary corrective action by
obtaining through his PROSTOCK distributor any replacement parts. If the contractor is not
available, simply contact any other local contractor handling PROSTOCK products.

The name and location of a local contractor can usually be found in your telephone directory
or by contacting a PROSTOCK distributor. If necessary, the following PROSTOCK office can
advise you of the nearest PROSTOCK distributor:

P.O. Box 17010 • Fort Smith, Arkansas 72917-7010 • [phone] • (For CA only: [phone])

HOWEVER, ANY REPLACEMENTS ARE MADE SUBJECT TO VALIDATION BY PROSTOCK OF IN­WARRANTY COVERAGE.

An item to be replaced must be made available in exchange for the replacement.

MISCELLANEOUS: No one is authorized to make any warranties on behalf of PROSTOCK. ANY
IMPLIED WARRANTIES, INCLUDING MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE, SHALL NOT EXTEND BEYOND THE APPLICABLE WARRANTY PERIODS SPECIFIED
ABOVE, PROSTOCK SOLE LIABILITY WITH RESPECT TO DEFECTIVE PARTS SHALL BE AS SET
FORTH IN THIS WARRANTY, AND ANY CLAIMS FOR INCIDENTAL OR CONSEQUENTIAL
DAMAGES ARE EXPRESSLY EXCLUDED. Some states do not allow limitations on how long an
implied warranty lasts, or for the exclusion of incidental or consequential damages, so the
above limitation or exclusion may not apply to you.

This Warranty gives you specific legal rights, and you may also have other rights that vary from
state to state.

P.O. Box 17010 • 3900 South Zero Street • Fort Smith, Arkansas 72917-7010

Phone: [phone] (For CA only:

[phone])

¤

155587-002 02/04

Power Tray Assembly 120/50-60/1

High Frequency Power Supply*

Electronic Air Flow Sensor*

On/Off switch*

Interlock Switch*

Cabinet Assembly

Pre-Filter (2 req.)

Cell, Ionizing-Collecting (2 req.)

Ionizing Wire Assembly

Front Panel Assembly

Contact Board Assembly (2 req.)*

Charcoal filter (optional, not shown)

Step-down Transformer 120V to 24VAC*

Step-down Transformer 240V to 24VAC option

Insulator (6 req. per cell)

Cell Key (not shown) (1 req.)

Power Tray Cover

1

2

3

4

5

6

7

8

9

10

11

12

13

13a

14

15

16

45-25053-47

45-25053-49

45-25053-46

45-25053-12

45-25053-50

89-25053-64

54-25053-20

45-25053-52

45-25053-53

(13 req.)

89-25053-68

45-25053-35

54-25053-36

46-25053-55

46-25053-71

45-25053-43

45-25053-44

89-25053-72

45-25053-62

45-25053-49

45-25053-46

45-25053-12

45-25053-63

89-25053-65

54-25053-67

45-25053-75

45-25053-60

(10 req.)

89-25053-70

45-25053-35

54-25053-74

46-25053-55

46-25053-71

45-25053-43

45-25053-44

89-25053-73

45-25053-47

45-25053-49

45-25053-46

45-25053-12

45-25053-50

89-25053-66

54-25053-21

45-25053-59

45-25053-60

(13 req.)

89-25053-69

45-25053-35

54-25053-37

46-25053-55

46-25053-71

45-25053-43

45-25053-44

89-25053-72

DescriptionRef.

No.

84-25052-07

(16” x 25”)

84-25052-09

(20” x 20”)

84-25052-08

(20” x 25”)

Parts List

25

Ta ble of Contents

Introduction ......................................................................................1

Unit Components..............................................................................2

Operation ..........................................................................................3

1) Regular Dusting & “White Dust” ......................................3

2) Ozone ..................................................................................3

3) High Altitude Applications ................................................4

Maintenance of Your Electronic Air Cleaner..................................5

1) Washing the Cells and Pre-filter(s)....................................5

2) Replacing the Ionizer Wires ..............................................6

3) Cleaning the Air Flow Sensor (AFS) ..................................6

Common Questions & Answers........................................................7

Common Troubleshooting Techniques............................................9

Unit Specifications ............................................................................10

Warranty............................................................................................26

HVAC INSTALLATION INSTRUCTIONS....................................................11

(for use by authorized HVAC contractors only)

Technical Specifications....................................................................11

Installation Considerations ..............................................................12

Application ............................................................................12

Installation Requirements ....................................................12

Air conditioning ....................................................................12

Evaporative Humidifiers........................................................12

Atomizing Humidifiers ..........................................................13

Sheet Metal Installation ........................................................13

Transitions ..............................................................................13

Outdoor Air............................................................................13

Turning Vanes ........................................................................13

Location Selection ............................................................................14

Typical Mounting Positions ..............................................................15

Mechanical Installation ....................................................................16

Electrical Installation ........................................................................18

System Checkout ..............................................................................19

Troubleshooting ................................................................................20

Air Flow Sensor ......................................................................20

Primary Circuit ......................................................................21

Secondary Circuit – Ionizing-Collecting Cell ........................22

Secondary Circuit – Power Supply ........................................23

Unit Diagram & Parts List ......................................................................25

Warranty ................................................................................................26

*Component of Power Tray Assembly

10. If no voltage is present, remove the second cell.
Install cell number one and measure voltage as
described in step #7. If voltage is present, the
second cell, which is now out of the cabinet, is
shorted. Refer to COMMON TROUBLE SHOOTING
TECHNIQUES (pg. 9).

11. If no voltage is present, remove both Ionizing­Collecting Cells and measure the power supply
output. While depressing the safety interlock
switch lever, touch the end of the high voltage
probe to either the front or rear contact board
assembly. The meter should read 6.2 KVDC or
higher.

12. If no voltage is present, check the transformer. Set
the Multimeter for reading AC voltage at 200 volt
full scale and attach meter test leads to the
junction of the transformer secondary leads and
the circuit board. The meter should read 24 volts
+/– 4 volts.

13. If there is no voltage from the transformer,
replace the transformer and power supply board.

Measuring Voltage at Ionizing
Collecting Cell

Measuring Voltage at Contact
Board Assemblies

Troubleshooting

24

INTRODUCTION

This Electronic Air Cleaner is technically known as a two-stage electrostatic precipitator. The air
cleaner is designed to remove airborne particulates, including dust, dirt, smoke, pollen, virus,
spores, bacteria, and mold from indoor air.

Air movement through the unit is provided by the heating, air conditioning or ventilating system
blower. As dirty air enters the air cleaner, the air passes through Metal Mesh Pre-filters. The Pre­filters prevent lint, pet hair and other large particulates from entering the air cleaner. It is
important that these filters be in place to prevent excessive dirt loading of the air cleaner
Ionizing-Collecting Cells. These filters extend the time interval between scheduled maintenance
of the air cleaner, which allow the Ionizing-Collecting Cells to provide clean air for a longer
period between washings.

The pre-filtered air then passes through a two-stage Electronic Air Cleaner. In the first stage, all
airborne particulate, even submicron size, are electronically charged (positive) as they pass
through the ionizer section. The ionizer field is a result of a corona discharge emanating from
the fine, tightly strung wires suspended between two adjacent flat plates. In the second stage,
the charged particulate passes through an intense electrical field established between
alternately charged and grounded parallel collector plates. Here, the charged (positive)
particulate is attracted to the ground (negative) plates and removed from the air stream.

Introduction

1

For Qualified HVAC

Installer Only

SECONDARY CIRCUIT POWER SUPPLY

If the Red CELL ENERGIZED light remains out with the Ionizing-Collecting Cells
removed from the cabinet, the power supply is defective. Specific problems in
the Power Tray Assembly can be isolated by using a Multimeter and High
Voltage Probe to check the output voltages.

To check the secondary circuit, a high voltage meter is required. See the section
entitled RECOMMENDED SERVICE TOOLS (pg. 20). To check for proper
operation, it is imperative that the procedure be followed as outlined below:

1. Make sure the HVAC system is operating, the air cleaner ON/OFF switch is
ON, and air cleaner input voltage is correct (120V, 50-60Hz for 120V units
and 240V, 50-60Hz for 240V units).

2. Remove Front Panel Assembly from air cleaner.

3. Remove Power Tray Assembly Cover.

4. Check the high voltage contact board assembly for damage or carbon
tracking.

NOTE: The cell contacts must be visually checked for corrosion, excessive dirt
build up, and electrical arc tracking (Carbon path from stainless steel spring to
grounded metal). Clean or replace as required.

5. Replace both Ionizing-Collecting Cells in the air cleaner cabinet.

6. Make test connections from the High Voltage Probe to the Multimeter in
accordance with the probe’s instruction manual. The Multimeter should be
set for reading DC voltage at 20 volt full scale.

7. Attach the High Voltage Probe ground lead to the air cleaner cabinet.
While depressing the safety interlock switch lever, touch the ionizer wire
support with end of the High Voltage Probe. The meter reading should be

6.2 kVDC + .2 kVDC.

8. If no voltage is measured, remove the first Ionizing-Collecting cell and
check the second cell by repeating step #7. The meter should read 6.2
kVDC + .2 kVDC.

9. If proper voltage is measured, the first cell is shorted. Refer to COMMON
TROUBLESHOOTING TECHNIQUES (pg. 9).

Troubleshooting

23

Cabinet

Mounts to existing ductwork; houses the Ionizing-Collecting Cells and Pre-filters.

Ionizing-Collecting Cells

Collect the dust, dirt and other particulates in the air. They contain the ionizing and collecting
sections. The cells must be installed with the ionizing wires on the air intake side. A spring
contact is located on the top of each cell and must be in the position to make contact with the
contact board assemblies on the bottom of the Power Tray Assembly.

Pre-filters

Trap large particulates before they enter the Ionizing-Collecting Cells Power Tray Assembly.

Power Tray Assembly

Contains the indicating lights, solid state power supply, contact boards and electrical controls
including the ON/OFF switch and safety interlock switch. A power cord at the rear of the 120 volt
Power Tray allows the unit to be connected to a standard 120 volt outlet. A wiring compartment
is provided on all models at the rear of the Power Tray allowing the option to permanently wire
the unit directly to the HVAC System Control.

Air Flow Sensor (AFS)

Controls the operation of the unit by sensing the movement
of air within the duct. This helps to reduce power usage.

The AFS is designed to provide an efficient and reliable
method of controlling the operation of the air cleaner when
the dealer is unable to wire the unit directly into the HVAC
System Blower Control Circuit. The AFS utilizes a thermistor,
when electrically powered, heats up to approximately 130° F.
The AFS stabilizes at this temperature and while the HVAC
System Blower is in operation, air flows through the ductwork, creating a vacuum effect that
pulls cooler air over the hot surface of the thermistor. This air movement cools down the
thermistor which allows the AFS to register that the HVAC System blower is moving air and the
Electronic Air Cleaner must be powered to provide air cleaning.

Air Cleaner Model Identification

The model number and part number for your Electronic Air Cleaner can be found on the data
label located on the inside of the Front Panel Assembly.

Unit Components

2

For Qualified HVAC

Installer Only

SECONDARY CIRCUIT

IONIZING-COLLECTING CELL

The cells are electrically energized through a contact terminal located at the
top center of each cell. The ionizing wires and alternating collector plates are
electrically charged while the interleaving plates are grounded.

If the space between the charged and grounded plates is bridged with
conductive or semi-conductive material, a short circuit develops. The bridging
or short may be caused by damaged plates, or foreign material lodged
between/on the components. Since the cell should be periodically removed
from the unit to wash away collected dirt, it is susceptible to physical damage.
The cell also contains the ionizing wires, which have been designed due to their
function with minimal structure support and are susceptible to breakage. Short
circuit issues related to dirty or damaged Ionizing-Collecting Cells are readily
identified by the lack of illumination of the Red CELL ENERGIZED light and
quickly identified and isolated by a simple procedure.

To determine if a short circuit condition exists in one or both Ionizing­Collecting Cell(s), turn the Electronic Air Cleaner OFF. Remove both Ionizer­Collecting Cells from the cabinet. Re-position the Front Panel Assembly to the
cabinet, turn ON/OFF switch ON and ensure HVAC system blower is operating.

The Green INPUT POWER light should illuminate. If the Red CELL ENERGIZED
light illuminates, an electrical short circuit exists in one or both of the Ionizing­Collecting Cells. Replace the cells, one at a time, to determine which cell has the
short circuit. The Red CELL ENERGIZED light will not illuminate if a short circuit
condition is detected.

Most short circuit troubles in the cell can be visually detected and corrected.
Refer to COMMON TROUBLESHOOTING TECHNIQUES (pg. 9).

NOTE: The Ionizing-Collecting Cells are not designed for field repair. Ionizing
wires and insulators can be field replaced; however, it is not recommended
that you attempt to replace other cell components (i.e. collecting plates, end
plates, ionizer wire supports).

Troubleshooting

22

Dusting and “White Dust”

Your new Electronic Air Cleaner will efficiently clean and filter your household air. It will not
eliminate the need for regular dusting of your furniture and belongings. Duct-mounted air
cleaners can only clean air that reaches the air cleaner. Therefore, if the particulates are not
being carried to the air cleaner in the air stream, the air cleaner cannot remove them from your
home.

Occasionally a “white dust” may be noticed in bedrooms or newly furnished rooms. This is
mainly composed of lint which, because it is heavier than other particulates, settles before it
reaches your unit. This “white dust” is not mixed with airborne dirt particles, therefore, it is clean
and has no staining or soiling properties. Running the furnace blower continuously, day and
night, will help reduce this from occurring.

Ozone

Under normal operating conditions, all Electronic Air Cleaners produce minute quantities of
ozone as an incidental by-product. In fact, all electronic products, such as televisions, cordless
telephones and refrigerators, produce some amount of ozone. The average homeowner can
detect the smell of ozone concentrations as low as 25 to 100 ppb (parts per billion). The design
of this unit has been tested and ozone production is approximately half of the published
permissible limits established by the Environmental Protection Agency. These limits recommend
that the concentration of indoor ozone not exceed 50 ppb. Ozone is not harmful in these
concentrations. In fact, the ozone level in major cities can sometimes reach as high as 100 ppb
on a summer day. The addition of optional charcoal after-filters can help reduce the smell of
ozone generated by the air cleaner.

Normally, a new unit will produce more ozone than one that has been in operation for several
weeks. This is due to sharp corners or manufacturing burrs on the Ionizing-Collecting Cell Plates
and is normal. As the Electronic Air Cleaner arcs and zaps, the voltage is vaporizing these areas
and tends to round them off. This is part of the breaking-in period of ownership and the issue
is self-correcting. Also, high-altitude locations can be more susceptible to noticing the presence
of ozone.

An Ionizing-Collecting Cell that has been damaged or bent (the designed spacing between
electrically charged and ground components has been decreased) may also produce an abnormal
amount of ozone.

Operation

3

For Qualified HVAC

Installer Only

Circuit Diagram