Carrier CRRFCURB Series 48, 50V Package Rooftop Units Accessory Roof Curbs Installation Guide

Carrier CRRFCURB Series 48, 50V Package Rooftop Units Accessory Roof

Curbs

Installation Instructions

Part No : CRRFCURB040A00, 041A00, 042A00, 057A00, 058A00, 059A00, 060A00, 064A00, 065A00, 066A00, 067A00

SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should install, repair, or service air-conditioning equipment. Untrained personnel can perform the basic maintenance functions of replacing filters. All other operations should be performed by trained service personnel. When working on air-conditioning equipment, observe precautions in the literature, tags, and labels attached to the unit, and other safety precautions that may apply.

WARNING
To prevent injuries and rain damage, do not leave roof openings uncovered. If the installation is not completed immediately after the roof opening is cut and framed, provide an adequate temporary cover for the roof opening.

INSTALLATION

1. Before installing the curb:
   • Verify curb usage in Table 1. Ensure the curb part number matches the unit configuration.
   • Verify all curb parts have been received per Tables 2 and 3.
   • Ensure that the curb is located so that proper service clearances are maintained on the unit. Check unit-certified drawings or unit installation instructions for clearances.
   • Ensure that the curb can be installed within leveling tolerances. See Unit Leveling Tolerances in Fig. 1-5 for the acceptable slope of the unit.
2. Cut a hole in the roof for cross openings. See Fig. 1-5 for cross-opening dimensions in the curb. Do not cut out the entire area underneath the curb.
3. Frame the roof opening to provide adequate structural support.
   Table 1 — Curb Usage** UNIT**

SIZE 48/50V

| ****

PART NO.

| ****

USAGE

---|---|---

27-35

| CRRFCURB040A00| 48V Low Heat CPT Chassis| 50V CPT Chassis
CRRFCURB041A00| 48V High Heat CPT Chassis| —
CRRFCURB057A00| 48V STD Chassis| 50V STD Chassis with Plenum
CRRFCURB058A00| 48V EXT Chassis| 50V EXT Chassis with Plenum
CRRFCURB064A00| —| 50V STD Chassis
CRRFCURB065A00| —| 50V EXT Chassis

40-50

| CRRFCURB042A00| 48V CPT Chassis| 50V CPT Chassis
CRRFCURB059A00| 48V STD Chassis| 50V STD Chassis with Plenum
CRRFCURB060A00| 48V EXT Chassis| 50V EXT Chassis with Plenum
CRRFCURB066A00| —| 50V STD Chassis
CRRFCURB067A00| —| 50V EXT Chassis

LEGEND

  *  **CPT** — Compact
  *  **EXT** — Extended Standard
  *  **STD** — Standard

4. Assemble the curb sides using the joining brackets and corner brackets as shown in Fig.6. Corner brackets (see Fig.7) are used in 4 corners plus are installed back to back where attached to cross supports (see Fig. 8).
5. Attach the curb side assembly to the curb ends using the corner brackets as shown in Fig. 1 and 2.
6. Screw the cross supports in place on the curb sides as shown in Fig. 1-5.
7. Screw the supply support in place between the cross supports as shown in Fig. 1-5.
8. Make sure the curb is square by measuring (equal distances) the cross corners. Once square attaches the curb to the building structure following all applicable codes.
9. Roof-in curb per Fig. 1. Follow all applicable codes.
10. Install provided gasketing around the complete perimeter of the curb and the supply and return the cross opening in the curb.

Table 2 — Package Contents — Standard and Extended Chassis

PACKAGE PART NO.

| PACKAGE CONTENT
---|---
Corner Brackets| Cross Supports| Curb Ends| Curb Sides| Gasket| Hardware Package| Joining Bracket| Supply Air Support
CRRFCURB057A00| 4| 4| 2| 6| 1| 1| 4| 1
CRRFCURB058A00| 4| 4| 2| 6| 1| 1| 4| 1
CRRFCURB059A00| 4| 4| 2| 6| 1| 1| 4| 1
CRRFCURB060A00| 4| 4| 2| 6| 1| 1| 4| 1
CRRFCURB064A00| 4| 3| 2| 4| 1| 1| 2| 1
CRRFCURB065A00| 4| 4| 2| 6| 1| 1| 4| 1
CRRFCURB066A00| 4| 4| 2| 6| 1| 1| 4| 1
CRRFCURB067A00| 4| 4| 2| 6| 1| 1| 4| 1

Table 3 — Package Contents — Compact Chassis

PACKAGE PART NO.

| PACKAGE CONTENT
---|---
Angle Brackets| Cross Supports| Curb Ends| Curb Sides| Gasket| Hardware Package| Joining Bracket| Supply Air Support
CRRFCURB040A00| 4| 7| 2| 4| 1| 1| 2| 1
CRRFCURB041A00| 8| 7| 2| 4| 1| 1| —| 1
CRRFCURB042A00| 4| 8| 2| 4| 1| 1| 2| 1

NOTE: See Fig. 3-5 on pages 5-7.

IMPORTANT: Gasketing is critical for water integrity. Improperly installed gasketing can result in air leaks and poor unit performance .

IMPORTANT: Gasketing is critical for water integrity. Improperly installed gasketing can result in air leaks and poor unit performance.

NOTE(S):

1. All curbs are shipped knocked down.
2. Dimensions in [ ] are millimeters.

Fig. 2 — Curb Assembly (CRRFCURB058A00 Shown)

IMPORTANT: Gasketing is critical for water integrity. Improperly installed gasketing can result in air leaks and poor unit performance.

NOTES:

1. This is field-installed.
2. All curbs are shipped knocked down.
3. Dimensions in [ ] are millimeters.

Fig. 3 — CRRFCURB040A00 Curb Assembly

IMPORTANT: Gasketing is critical for water integrity. Improperly installed gasketing can result in air leaks and poor unit performance.

NOTE(S):

1. This is field-supplied.
2. All curbs are shipped knocked down.
3. Dimensions in [ ] are millimeters.

Fig. 4 — CRRFCURB041A00 Curb Assembly

IMPORTANT: Gasketing is critical for water integrity. Improperly installed gasketing can result in air leaks and poor unit performance.

NOTE(S):

1. This is field-supplied.
2. All curbs are shipped knocked down.
3. Dimensions in [ ] are millimeters.

Fig. 5 — CRRFCURB042A00 Curb Assembly

The manufacturer reserves the right to discontinue or change at any time, specifications, or designs without notice and without incurring obligations.

• Catalog No. 04-53480492-01 Printed in U.S.A. Form No. 48-50-7ASI Pg 12 6-24 Replaces: NEW

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