Issue: The field team needs to add door access to the existing unit casing on the CSAA/PSCA/UCCA, or TCFS/TCPA air handler. We are seeking vetted 3rd party solutions to accomplish this task and require guidance from our customer or service team.
Solution: In the past, the field team has successfully created openings in the existing panels of the unit casing to install doors from ITM4 or Wintech Inc. Here are the details for these solutions:
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ITM4 Doors:
- Website: ITM4 Products
- ITM4 offers a range of doors that can be integrated into the unit casing after cutting the necessary openings.
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Wintech Inc Doors:
- Contact: HVACSales@wintechinc.com
- Wintech Inc. provides various door solutions suitable for air handler units.
While these are the primary options that have been vetted, there may be other suppliers available. It is important to discuss lead times and pricing directly with the door suppliers to ensure the best fit for your needs.
Example of unit casing modified in the field to add a 3rd party door for access. A temporary plug panel was installed until the door arrived.
ITM4
1502 Miller Street
La Crosse, WI 54601
Main Phone: 763-497-0842
________________________________________________________________________________________________________________
Wintech Inc
201 Industrial Drive
Monet, MO 65708
417-235-7821
Instructions
General Instructions for Installing a New Door/Plug Door on AHU Casing
Note: These instructions are general and are not meant to be all-inclusive. Ensure compliance with all local, jobsite, company, and PPG safety rules and regulations. Part numbers listed are Trane Custom Part Numbers.
1. Identify New Door/Plug Door Location
1.1. Ensure the area is clear of any electrical conduit, boxes, piping, and internal components, both inside and outside the AHU casing. 1.2. Ensure you have a suitable work area in front of the AHU casing, both inside and outside.
2. Mark Off New Penetration on the Casing
2.1. Mark the new penetration on the casing and check for squareness using diagonal measurements. 2.2. Ensure you have at least 6" clearance on both the top and bottom of the panel for easier installation. 2.3. Add 1/2" to both the horizontal and vertical dimensions of the new door/plug panel. Note that the door is measured by the door penetration opening, not by the true door opening. For example, a "28' door" will have a 22.5" actual door opening.
3. Cut Both Inside and Outside Skins of Casing
3.1. Ensure cuts are clean, square, and aligned. 3.2. Check cuts with a level and diagonal measurements.
4. Prepare Capping Material for New Opening
4.1. Suggest using 12-gauge material. Refer to the "OPENING w/ CAPS" PDF for guidance. 4.2. Ensure metal compatibility when selecting cap material. 4.3. Add 1/8" to the wall thickness to the cap ID when fabricating the cap. 4.4. Note that 2", 3", and 4" thick panels are nominal measurements. 4.5. Cut both ends of the cap with a miter joint.
5. Dry Install Capping Material
5.1. Dry install the capping material to check for fit and appearance. 5.2. Ensure the new door/plug panel will fit properly.
6. Install Caps
6.1. Apply caulk on all metal-to-metal contact surfaces. Ensure to add 3/8" to both the vertical and horizontal overall length (OAL) of the penetration.
Caulk Part Number: X35100297010 - TUBE, Caulk, Manus-Bond 75-AM UL 6.2. Secure caps with zip Tek screws.
Screw Part Number: X25020228010 - #8 X 3/4 MODIFIED PHIL K-LATH TEK SS SCREW ZIP 6.3. Once again, ensure the level and appearance are satisfactory.
Follow the Door Manufacturer's installation procedures, if/when provided.