NORTEK P6SD Full Perimeter Roof Mounting Curb Installation Guide
- June 13, 2024
- NORTEK
Table of Contents
NORTEK P6SD Full Perimeter Roof Mounting Curb
Product Information
- Product Name: Full Perimeter Roof Mounting Curb
- Model Numbers: KITS 547830A, 547831A, 547850A, 547851A
- Compatibility: Designed to be used with the following units – R4GM-072, P6SD/P8SE, Q6SD/Q8SE, R6G(D,F,I), R8G(D,E), R8HE 02-060
- Construction: Made of 18 gauge galvanized steel with a full perimeter 1 x 4 wood nailer strip
- Features: NRCA approved, includes vertical and horizontal duct supports, insulated pan
- Date: August 2022
- Document Number: 18-HE135D1-1A-EN
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.
Note
Graphics in this document are for representation only. Actual model may
differ in appearance.
Important Notice
If setting this curb for use with Nortek Global HVAC 95% AFUE R8HE/PPG3HE
Series condensing style package gas/electric unit, routing and securement of
the gas heat exchanger condensate drain line must be determined and installed
prior to setting the unit on the curb.
Product Usage Instructions
Step 1: Unboxing
Inspect the package and cut shipping bands to remove the following items
- Hardware
- Gasket Material
- 4 Duct Supports
- 3 Insulated Pans
Step 2: Pre-Assembly
Lay out all the curb pieces before assembly to ensure that all necessary
parts are included. Refer to Figure 2 for reference.
Step 3: Corner Assembly
- Align each curb side as shown in Figure 3.
- Using a hammer, drive the curb hinge pin down until the top of the pin is below the top of the curb as shown in Figure 4.
Step 4: Square Check
After assembling the four corners, check if the curb is square by measuring
diagonally from each opposite corner. The two measurements should be the same
for each direction, as shown in Figure 5.
Step 5: Duct Supports Installation
Locate the duct horizontal support (C) and install it with the opening over
the desired duct location. Refer to Figure 7 for reference.
Step 6: Vertical Duct Support Installation
Install the vertical duct support (D) as shown in Figure 7.
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.
This Roof Curb is NRCA approved and is constructed of 18 gauge galvanized steel with a full perimeter 1″ x 4″ wood nailer strip. The curb is designed to be used with the Cooling, Gas Electric, and Heat Pump Models. The curb is shipped with the following parts, See Figure 2
- 2 ea. Curb Long Sides – 49 ½” Long (A)
- 2 ea. Curb Short Sides – 41 ½” Long (B)
- 1 ea. Horizontal Duct Support – 46 ½” Long (C)
- 1 ea. Vertical Duct Support – 21″ Long (D)
- 1 ea. Vertical Hat Section – 19″ Long (E)
- 1 ea. Horizontal Hat Section – 25″ Long (F)
- 2 ea. Insulated Pan – 46 ½” Long (G)
- 1 ea. Insulated Pan – 21” Long (H)
- 1 ea. Hardware Package Includes
- 4 ea. “Hinge” Pins 316″
- 12 ea. Hex Washers screws #10 x ½”
- 2 ea. Gasket ¾” x 1 ¼” x 14′ (28 ft. total)
Important! Notice to Installer
If setting this curb for use with Nortek Global HVAC 95% AFUE R8HE/PPG3HE
Series condensing style package gas/electric unit, routing and securement of
the gas heat exchanger condensate drain line must be determined and installed
prior to setting the unit on the curb.
It is recommended to drill a 1.00”-1.25” diameter hole through the roof below
the rectangular opening located in outer close off panel (G), approximately
15” in from the short side of the curb and 1”-2” in from the long side of the
curb. (See Figure 7) If drilling a hole is not an option, routing of the
condensate drain hose over to the duct passage opening with enough slope is
acceptable as long as drain line is secured to curb and duct, ensuring no
kinks or traps can form between the collector box drain or interior of the
building. Leave a minimum of 24” drain line extending out the top of front
close off panel (G) for passage through unit bottom and connection to unit
drain when unit is being set. See unit or Condensate/Vent Drain Kit
(P/N-922485) instructions for completion of the drain connection. It is
recommended no non-serviceable connections are introduced in the drain line
between unit drain connection and an accessible area within the building
interior. Securement of the drain line to the inside surface of the roof curb
is acceptable and should be made in the wood nailer area ( top 3.5”) to avoid
possible leaks or penetrations to roofing materials.
Step 1
Curb Package is shown as shipped with easy to identify part numbers on all
sides. Cut shipping bands and remove Hardware, Gasket Material, 4 Duct
Supports, and 3 Insulated Pans.
Step 2
Layout the curb pieces before assembly to insure that all the necessary pieces
are included.
Step 3
Corner Assembly: Align each curb side as shown in Figure 3. Using a
hammer, drive the curb “hinge” pin down until the top of the pin is below the
top of the curb as shown in Figure 4. 
Step 4
After the four corners are assembled; the curb should be checked to be sure it
is in “square”. Do this by measuring diagonally from each opposite corner as
shown in Figure 5. The two measurements should be the same for each direction.
DETAILS
Duct Support flange goes in slot on curb. Screw Brace to curb.
Duct Support flange goes in slot on pan or other brace. Screw brace together.
Note
Duct Sup ports can be lo cated on ei ther end de pend ing on in di vid ual ap
pli ca tions.
Step 5
Install the duct horizontal support (C) as shown with opening over the desired
duct location as shown in Figure 7.
Step 6
Install the vertical duct support (D) as shown in Figure 7.
Step 7
Install the vertical duct support (E) and horizontal duct support (F) on top
of vertical duct support (D) and horizontal duct support (C) respectively as
shown in Figure 6.
Step 8
Install the insulated pans (G) and (H) as shown in Figure 7.
Note
If installing this curb for use with Nortek Global HVAC R8HE Series
Roof Opening: (Shaded Area)
- 46 ½” Long x 19″ Wide
- Duct Sizes Are
- Return 18 ½” x 18 ½”
- Supply 18 ½” x 18 ½”
condensing style package gas/electric unit, cut and remove the insulation covering the 2” x 3” condensate drain passage in outer panel (G) only. Before installing inner panel (G) ensure there is enough slope and there are no kinks or high spots that could trap water in the line prior to entering the warmer interior of the building where a drain trap is REQUIRED.
Step 9
If the curb is being assembled and moved to another location, attach the duct
supports as shown in “Details”.
Step 10
Install 18 ½” x 18 ½” duct and secure to the curb with screws or rivets.
Step 11
Place the ¾” x 1 ¼” Gasket on all of the top edges of the Roof Curb, including
the duct supports. See Figure 7.
NOTE
Figure 7 is shown without parts (E) and (F)
DIMENSIONS
MODEL#| *A
547830A| 8
547831A| 14
547850A| 18
547851A| 24
Gasket Layout
For optimum system performance all cracks and seams should be sealed with
approved methods and materials
About Trane and American Standard Heating and Air Conditioning
Trane and American Standard create comfortable, energy efficient indoor
environments for residential applications. For more information, please visit
www.trane.com or
www.americanstandardair.com.
The manufacturer has a policy of continuous data improvement and it reserves the right to change design and specifications without notice. We are committed to using environmentally conscious print practices.
18-HE135D1-1A-EN 03 Aug 2022 Supersedes (New)