Bryant MACA - User Manual

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NOTE: Read the entire instruction manual before starting the

installation.

SAFETY CONSIDERATIONS

Installation and service of heating and air conditioning equipment

can be hazardous due to system pressure and gas and electrical

components. Only trained and qualified personnel should install,

repair, or service heating and air conditioning equipment.

Untrained personnel can perform basic maintenance functions

such as cleaning and replacing air filters. All other operations must

be performed by trained service personnel. When working on

heating and air conditioning equipment, observe precautions in the

literature, tags, and labels attached to or shipped with the unit and

other safety precautions that may apply.

Follow all safety codes. Wear safety glasses and work gloves. Use

quenching cloth for brazing operations. Have fire extinguisher

available. Read these instructions thoroughly and follow all

warning or cautions attached to the unit. Consult local building

codes and National Electrical Code (NEC) for special require-

ments.

It is important to recognize safety information. This is the

safety-alert symbol

. When you see this symbol on the unit and

in instructions or manuals, be alert to the potential for personal

injury.

Understand the signal words DANGER, WARNING, and CAU-

TION. These words are used with the safety-alert symbol. DAN-

GER identifies the most serious hazards which will result in severe

personal injury or death. WARNING signifies hazards which

could result in personal injury or death. CAUTION is used to

identify unsafe practices which would result in minor personal

injury or product and property damage.

INTRODUCTION

The Model MACA Efficient Mechanical Air Cleaner is designed

for installation in the return-air duct system of any forced-air

heating and/or cooling system. The model MACA Mechanical Air

Cleaners are available in three sizes, 1200, 1400, and 2000 CFM.

The Model MACA is a mechanical air cleaner incorporating

special pleated filter media designed to remove dirt, dust, pollen

and other microscopic particles from the air passing through it. The

pleats provide an exceptionally large filtering face area in a very

compact space which allows maximum dirt holding capacities with

minimum air flow resistance. (See Table 1.)

INSTALLATION

I. INSTALL AIR CLEANER CABINET IN RETURN-AIR

SYSTEM

CAUTION: Turn OFF the electrical supply to the fur-

nace or air handler before beginning installation.

1. Remove and discard existing furnace or air handler filter(s).

2. Referring to Fig. 2 and 3 for air cleaner dimensions and

typical installations, determine best installation location of

air cleaner.

NOTE: A 26-in. clearance must be allowed for removal of the

media assembly from the air cleaner cabinet.

3. Using standard practices, remove a section of return-air

duct to allow installation of air cleaner cabinet.

4. Install air cleaner in duct opening. (Use a transition if

openings are different).

5. Mounting holes are provided for duct work attachment.

(See Fig. 2). If adjoining duct work is flanged, install

screws so that their heads are inside cabinet to prevent

damage to filter during removal and installation.

6. Remove media filter from plastic bag and place media filter

in cabinet. Directional arrows on filter cartridge must point

in direction of air flow.

7. After unit has been secured, seal seams air tight with duct

tape or caulking.

8. Reinstall cabinet front panel door assembly.

Fig. 1—Model MACA Mechanical Air Cleaner

A98152

TABLE 1—AIR CLEANER PRESSURE DROP

SIZE 12 14 20

Airflow

(CFM)

Resistance (In. wc)

600 0.055 0.045 0.04

800 0.08 0.06 0.05

1000 0.12 0.115 0.09

1200 0.16 0.16 0.115

1400 — 0.23 0.15

1600 — — 0.18

1800 — — 0.22

2000 — — 0.27

installation and

operation instructions

MECHANICAL

AIR CLEANER

Cancels: New II MACA-12-1

3-98

MACA

—1—

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Summary

Introduction to Mechanical Air Cleaner

Installation Process

Install Air Cleaner Cabinet in Return-Air System

Instructions for installing the air cleaner cabinet into the return-air duct system of a forced-air system.

Maintenance Procedures

Filter Replacement Frequency

Guidance on how often to replace the air cleaner filter based on visual checks.

Replacing Filter Media

Step-by-step instructions for removing and replacing the filter media in the air cleaner cabinet.

The Bryant Mechanical Air Cleaner is an efficient air filtration device designed for installation within the return-air duct system of any forced-air heating and/or cooling system. Its primary function is to remove dirt, dust, pollen, and other microscopic particles from the air, thereby improving indoor air quality.

Function Description:

The air cleaner operates by drawing return air through a specialized pleated filter media. This media is engineered to capture a wide range of airborne contaminants, ensuring cleaner air circulates throughout the conditioned space. The pleated design provides an exceptionally large filtering surface area within a compact space, which contributes to its high dirt-holding capacity and minimal airflow resistance. The device is available in three sizes, corresponding to different airflow capacities: 1200 CFM, 1400 CFM, and 2000 CFM, allowing for selection based on the specific requirements of the HVAC system. The directional arrows on the filter cartridge must always point in the direction of airflow to ensure proper filtration.

Important Technical Specifications:

The Mechanical Air Cleaner cabinet dimensions vary by model. For the MACAXCBBX012 and MACAXCBBX014 models, the "A" dimension (height) is 18-1/8 inches, the "B" dimension (width) is 13-3/4 inches, and the "C" dimension (depth) is 5-1/4 inches and 7-1/4 inches respectively. For the MACAXCBBX020 model, the "A" dimension is 22-1/8 inches, "B" is 17-3/4 inches, and "C" is 7-1/4 inches. The overall width of the cabinet is 25 inches, with a 22-5/8 inch opening for duct connection. A 26-inch clearance is required for the removal of the media assembly from the air cleaner cabinet during maintenance.

The air cleaner's performance is characterized by its pressure drop (resistance), measured in inches of water column (in. wc) at various airflow rates (CFM). For a 600 CFM airflow, the resistance is 0.055 in. wc for the 1200 CFM model, 0.045 in. wc for the 1400 CFM model, and 0.04 in. wc for the 2000 CFM model. At 1200 CFM, the resistance is 0.16 in. wc for the 1200 CFM model, 0.16 in. wc for the 1400 CFM model, and 0.115 in. wc for the 2000 CFM model. The maximum resistance for the 2000 CFM model at its rated airflow is 0.27 in. wc. These specifications highlight the efficiency of the pleated media in maintaining low airflow resistance while providing effective filtration.

Usage Features:

The Bryant Mechanical Air Cleaner is designed for versatile installation within the return-air ductwork. It can be integrated into various system configurations, including upflow furnaces with or without transitions, upflow furnaces with turning vanes, and horizontal duct runs. The unit is initially configured for left-to-right airflow when facing the access door. However, for right-to-left airflow, the filter cartridge can be easily removed, turned around, and reinserted, ensuring the directional arrows on the filter always align with the airflow. This flexibility allows for adaptation to different duct orientations and system layouts. Mounting holes are provided for secure attachment to ductwork, and if adjoining ductwork is flanged, screws should be installed with their heads inside the cabinet to prevent damage to the filter during removal and installation. After installation, all seams must be sealed airtight with duct tape or caulking to prevent air leakage and ensure optimal performance.

Maintenance Features:

Regular maintenance is crucial for the continued high efficiency of the air cleaner. The primary maintenance task involves the periodic replacement of the filter media. The frequency of filter replacement is best determined by visual examination of the filter's condition, although periodic inspection and annual replacement are recommended to ensure sustained high efficiency.

The process for replacing the filter media is straightforward:

Safety First: Turn off the electrical supply to the furnace or air handler before beginning any maintenance to prevent accidental operation.
Access: Open the access door of the air cleaner cabinet by pulling its handle and remove the door completely.
Removal: Pull the used filter cartridge straight out of the cabinet.
Installation: Slide the new filter cartridge into the cabinet, ensuring that the "AIR-FLOW" arrow on the cartridge points in the direction of the airflow.
Reassembly: Replace the access door.
Power On: Turn the power back on to the furnace or air handler.

A 26-inch clearance around the cabinet is necessary to facilitate the easy removal and insertion of the filter media assembly during maintenance. This design consideration ensures that filter replacement can be performed without obstruction, simplifying the maintenance process. The ease of filter replacement, combined with the visual inspection method for determining replacement frequency, makes the Bryant Mechanical Air Cleaner a user-friendly device for maintaining indoor air quality.