Air Management Supply RXKG-DCC14 Roof Curbs Installation Guide
- September 17, 2024
- Air Management Supply
Table of Contents
INSTALLATION INSTRUCTIONS
RHEEM PN: 92-107192-21-00
MODEL# RXKG-DCC14 and RXKG-DCC24
3-6 TON ROOF CURBS
RXKG-DCC14 Roof Curbs
This Roof Curb is built to NRCA specifications and is constructed of 18 gauge
galvanized steel with a full perimeter 1” x 4” wood nailer strip. Curb height
is determined by the part number as listed below.
RXKG-DCC14 = 14 inches high
RXKG-DCC24 = 24 inches high STEP 1:
Immediately upon receipt curb package should be checked for transit damage. If
damage is detected, it should be noted on the delivery papers and a damage
claim filed with the last carrier. Compare curb contents to PACKAGE CONTENTS
List (TABLE 1) to note any missing parts.
Table 1 – Package Contents
ITEM| DESCRIPTION| QTY| 14” Tall RXKG-DDD14| 24”
Tall RXKG-DDD24
1| Curb long side – 74.871” long (a)| 2| CRBK-R022| CRBK-R029
2| Curb short side – 37.188” long (b)| 2| CRBK-R024| CRBK-R028
3| Curb cross support – 40.846” long (c)| 1| CRBK-R023| CRBK-R023
4| Deck pan – no utility hole – 40 1/8” long (d)| 3| CRBK-R026| CRBK-R026
5| Deck pan – with utility hole – 40 1/8” long (e)| 1| CRBK-R027| CRBK-R027
6| Curb long support – 34” long (f)| 1| CRBK-R024| CRBK-R024
7| Curb short support – 22 3/8” long (g)| 1| CRBK-R025| CRBK-R025
8| Curb gasket seal – 1/4” x 1 1/2” x 16’| 2| 9430-0100| 9430-0100
Step 2:
Layout curb pieces before assembly to ensure that all necessary pieces are
included (SEE FIGURE 2). STEP 3:
Cut roof opening per FIGURE 5, or if using special duct kits refer to their
provided instructions. Opening should be safely covered while working on and
around opening and curb. Step 4:
Corner Assembly. Align the CURB SHORT SIDE (b), which has the mating tabs,
with the CURB LONG SIDE, which has the mating slots (SEE FIGURE 3). Insert the
tabs into the slots and push down on the CURB SHORT SIDE until the tabs lock
in place. When the tabs are locked in place, the curb corners cannot be
separated. Repeat steps for all 4 corners.
Step 5:
After all four corners are assembled, the curb must be “squared up”. Do this
by measuring diagonally from each opposite corner (SEE FIGURE 4). The two
measurements should be the same for each direction.
Step 6:
Install the insulated deck pans on to top perimeter of the curb. Note: the
insulation will be facing down toward the roof. The deck pan (e) with the
utility hole cut out must be located as shown in FIGURES 2 and 5 for it to
line up correctly with the unit. The deck pans do not screw in place but are
held in place by the weight of the unit.
STEP 6 :
Install the CURB CROSS SUPPORT ( c) in front of the deck pans towards the duct
openings (SEE FIGURE 2 and 5). The support will lay over the top of the curb
perimeter.
STEP 7:
Install the CURB LONG SUPPORT (f) – SEE FIGURES 2 and 5. Make sure the support
is oriented correctly by checking measurement in FIGURE 5 to the center of the
condensate hole.
The end of the support will slide into a slot in the CROSS SUPPORT (c ).
Verify location by comparing to dimensions on FIGURE 5.
STEP 8:
Install CURB SHORT SUPPORT (g) – SEE FIGURES 2 and 5. The end of this support
will slide into a slot on the LONG DUCT SUPPORT (f). STEP 9:
Install provided gasket onto roof curb’s top perimeter. This is important to
provide a watertight seal between the curb and the unit. Peel the backing
paper off the gasket and install it on the top perimeter as shown in FIGURE 5.
STEP 10:
Roof curb can be secured to the roof structure through holes in the bottom
flanges of the CURB SHORT SIDES and CURB LONG SIDES, or by other means that
meets local and industry building codes.
STEP 11:
The CURB SHORT SIDES and CURB LONG SIDES have wood nailers toward the top,
which allows for roofing materials to be attached to the roof curb. Roof-in
the curb SEE FIGURE 7. Follow all local and industry codes