Installation Instructions
Clogged Filter Switch
Precedent™ Packaged Rooftop Units
3 to 25 Tons
Model Numbers and Usage:
| Model Numbers: | Used With: |
|---|---|
| FIACLFS001* | Precedent B or C cabinet (digit 39 = B, C), Standard or MERV 8 filters |
| FIACLFS002* | Precedent B or C cabinet (digit 39 = B, C), MERV 13 filters |
| FIACLFS003* | Precedent D cabinet (digit 39 = D), Standard or MERV 8 filters |
| FIACLFS004* | Precedent D cabinet (digit 39 = D), MERV 13 filters |
| FIACLFS005* | Precedent A cabinet (digit 39 = A), Standard or MERV 8 filters |
| FIACLFS006* | Precedent A cabinet (digit 39 = A), MERV 13 filters |
▲ SAFETY WARNING
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury. When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are attached to the equipment.
September 2024
ACC-SVN238B-EN
Introduction
Read this manual thoroughly before operating or servicing this unit.
Warnings, Cautions, and Notices
Safety advisories appear throughout this manual as required. Your personal safety and the proper operation of this machine depend upon the strict observance of these precautions.
The three types of advisories are defined as follows:
- ▲ WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
- ▲ CAUTION: Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury. It could also be used to alert against unsafe practices.
- NOTICE: Indicates a situation that could result in equipment or property-damage only accidents.
Proper Field Wiring and Grounding Required!
Failure to follow code could result in death or serious injury. All field wiring MUST be performed by qualified personnel. Improperly installed and grounded field wiring poses FIRE and ELECTROCUTION hazards. To avoid these hazards, you MUST follow requirements for field wiring installation and grounding as described in NEC and your local/state/national electrical codes.
Personal Protective Equipment (PPE) Required!
Failure to wear proper PPE for the job being undertaken could result in death or serious injury. Technicians, in order to protect themselves from potential electrical, mechanical, and chemical hazards, MUST follow precautions in this manual and on the tags, stickers, and labels, as well as the instructions below:
- Before installing/servicing this unit, technicians MUST put on all PPE required for the work being undertaken (Examples; cut resistant gloves/sleeves, butyl gloves, safety glasses, hard hat/bump cap, fall protection, electrical PPE and arc flash clothing).
- ALWAYS refer to appropriate Safety Data Sheets (SDS) and OSHA guidelines for proper PPE.
- When working with or around hazardous chemicals, ALWAYS refer to the appropriate SDS and OSHA/GHS (Global Harmonized System of Classification and Labeling of Chemicals) guidelines for information on allowable personal exposure levels, proper respiratory protection and handling instructions.
- If there is a risk of energized electrical contact, arc, or flash, technicians MUST put on all PPE in accordance with OSHA, NFPA 70E, or other country-specific requirements for arc flash protection, PRIOR to servicing the unit. NEVER PERFORM ANY SWITCHING, DISCONNECTING, OR VOLTAGE TESTING WITHOUT PROPER ELECTRICAL PPE AND ARC FLASH CLOTHING. ENSURE ELECTRICAL METERS AND EQUIPMENT ARE PROPERLY RATED FOR INTENDED VOLTAGE.
Important Environmental Concerns
Scientific research has shown that certain man-made chemicals can affect the earth's naturally occurring stratospheric ozone layer when released to the atmosphere. In particular, several of the identified chemicals that may affect the ozone layer are refrigerants that contain Chlorine, Fluorine and Carbon (CFCs) and those containing Hydrogen, Chlorine, Fluorine and Carbon (HCFCs). Not all refrigerants containing these compounds have the same potential impact to the environment. Trane advocates the responsible handling of all refrigerants.
Important Responsible Refrigerant Practices
Trane believes that responsible refrigerant practices are important to the environment, our customers, and the air conditioning industry. All technicians who handle refrigerants must be certified according to local rules. For the USA, the Federal Clean Air Act (Section 608) sets forth the requirements for handling, reclaiming, recovering and recycling of certain refrigerants and the equipment that is used in these service procedures. In addition, some states or municipalities may have additional requirements that must also be adhered to for responsible management of refrigerants. Know the applicable laws and follow them.
Follow EHS Policies!
Failure to follow instructions below could result in death or serious injury.
- All Trane personnel must follow the company's Environmental, Health and Safety (EHS) policies when performing work such as hot work, electrical, fall protection, lockout/tagout, refrigerant handling, etc. Where local regulations are more stringent than these policies, those regulations supersede these policies.
- Non-Trane personnel should always follow local regulations.
R-454B Flammable A2L Refrigerant!
Failure to use proper equipment or components as described below could result in equipment failure, and possibly fire, which could result in death, serious injury, or equipment damage.
The equipment described in this manual uses R-454B refrigerant which is flammable (A2L). Use ONLY R-454B rated service equipment and components. For specific handling concerns with R-454B, contact your local representative.
Copyright
This document and the information in it are the property of Trane, and may not be used or reproduced in whole or in part without written permission. Trane reserves the right to revise this publication at any time, and to make changes to its content without obligation to notify any person of such revision or change.
Trademarks
All trademarks referenced in this document are the trademarks of their respective owners.
Revision History
- Used with model number information updated.
- Updated General Information and Installation chapters.
General Information
An options board (FIAOPTN002*) must be installed in the unit for this accessory to operate.
This accessory kit detects static pressure differentials across the filters to indicate a clogged or dirty filter condition. When it detects such a filter problem, the Symbio ™™ 700 will annunciate a filter change required alarm.
- FIACLFS001* Clogged filter switch, may be used with standard or MERV 8 filters with the B/C cabinets (unit model digit 39 = B/C).
- FIACLFS002* Clogged filter switch, may be used with MERV 13 filters with the B/C cabinets (unit model digit 39 = B/C).
- FIACLFS003* may be used with standard or MERV 8 filters with the D cabinet (unit model digit 39 = D).
- FIACLFS004* may be used with standard or MERV 13 filters with the D cabinet (unit model digit 39 = D).
- FIACLFS005* may be used with standard or MERV 8 filters with the A cabinet (unit model digit 39 = A).
- FIACLFS006* may be used with standard or MERV 13 filters with the A cabinet (unit model digit 39 = A).
Inspection
- Unpack all components of the kit.
- Check carefully for shipping damage. If any damage is found, report it immediately, and file a claim against the transportation company.
Parts List
Table 1. FIACLFS001* or FIACLFS002*
| Qty | Description |
|---|---|
| 1 | Pressure switch |
| 1 | Pressure sensing tube |
| 1 | Length of 5/16-in. OD flexible tubing (1.25 ft.) |
| 4 | Sheet metal screw |
| 2 | Wire tie (pop-in) |
| 1 | Control harness |
| 1 | Pressure switch bracket |
Table 2. FIACLFS003* or FIACLFS004*
| Qty | Description |
|---|---|
| 1 | Pressure switch with control harness |
| 1 | Pressure sensing tube |
| 1 | Length of 5/16-in. OD flexible tubing (6.8 ft.) |
| 4 | Sheet metal screws |
| 1 | Wire tie (pop-in) |
| 1 | Sensor bracket |
| 1 | Control harness |
Table 3. FIACLFS005* or FIACLFS006*
| Qty | Description |
|---|---|
| 1 | Pressure switch |
| 1 | Pressure sensing tube |
| 1 | Length of 5/16-in. OD flexible tubing (1.2 ft.) |
| 1 | Sheet metal screw |
| 1 | Wire tie (pop-in) |
| 1 | Control harness |
| 1 | Pressure switch bracket |
Installation
Settings
The pressure switch is factory preset at 0.45-inch WC (1.12 mbar) for FIACLFS001/3/5* and 0.75-inch WC (1.87 mbar) for FIACLFS002/4/6*.
- After a failure situation is detected and corrected, reset the diagnostics in the Symbio™™ 700 or cycle power OFF then ON at the unit disconnect switch.
Rotating Components!
Failure to disconnect power before servicing could result in rotating components cutting and slashing technician which could result in death or serious injury. Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized.
- Insert one end of the 90° copper sensing tube into one end of the 5/16-inch (7.94 mm) OD flexible tubing and secure with pop-in wire tie. See Figure 1.
Figure 1. Aluminum or copper sensing tube
A diagram shows a copper or aluminum sensing tube with a pop-in wire tie securing it to the tube.
- Remove return air/filter access panel and fan access panels.
- Mount the pressure switch (with pressure fitting pointed upward) on the angle bracket at the bottom left of the return air compartment using the screws provided. See Figure 5, p. 7.
For FIACLFS005*/006* (A.0 cabinet) mount the pressure switch to the wire raceway using the bracket and screws provided in the kit, as shown in the Figure 2.
Figure 2. Clogged filter switch assembly FIACLFS005*/006*
A diagram shows the clogged filter switch assembly for FIACLFS005*/006*, indicating the pressure sensing tube, wire tie, clear plastic tubing, clogged filter switch, and harness.
Note: Switch must be located in return air compartment in order to measure air pressure entering the filter. The aluminum sensing tube measures pressure between the filter and ID coil.
- Install the other end of the 90° sensing tube into the pre-drilled hole near the top of the coil block-off to measure leaving air pressure behind the filter. Remove filters if necessary. See Figure 4, p. 6.
Figure 3. Clogged filter switch assembly - FIACLFS001*/002*
A diagram shows the clogged filter switch assembly for FIACLFS001*/002*, indicating the wire tie, pressure sensing tube, clear plastic tubing, clogged filter switch, and harness.
Figure 4. Filter access panels - B/C cabinet
A diagram illustrates filter access panels on a B/C cabinet, showing the location of the clogged filter switch and harness.
Figure 5. Filter access panels - D cabinet
A diagram illustrates filter access panels on a D cabinet. It shows routing the clear tube down to the sensor, securing with screws to the bottom of the return enclosure using the kit bracket. It also shows securing with pop-in wire tie to the wire tray, removing the filter if necessary, and securing with pop-in wire tie to the ID coil block-off, routing the sampling tube through the ID coil block-off.
- Connect the other end of the 5/16-inch (7.94 mm) OD flexible tubing to the pressure switch. Route the tubing such that it does not interfere with filter removal. See Figure 4, p. 6 for routing of the flexible tubing through the pop-in wire tie to around the return enclosure.
Wire Connection - Clogged Filter Switch
- Using the control harness included in the kit, connect red connector (PPF86) from harness to connector on clogged filter switch. See below Figure 6.
Figure 6. Fresh air module with clogged filter harness
A diagram shows a fresh air module with the clogged filter harness connected.
- Route harness up right side of return enclosure and through opening where factory wires lead to fresh air module inside of enclosure.
- Connect white connector (J15) of harness to white connector (P15) on fresh air module. See Figure 6.
- Secure harness with factory installed wires ties using the releasable feature on each wire tie.
Unit Close-up
Replace the two access panels removed in Step 3, p. 5.
American Standard® | Air Conditioning and Heating| HVAC Systems
English
