Roof Curb for Indirect Fired Gas Heating Products

Transcription

1 Installation GRAA-IN-1 ibrary Product Section Product Model iterature Type Service iterature Air Handling Make-Up Air GRAA Installation Sequence 1 Date December 1996 File No. Supersedes SV-AH-MUA-GRAA-IN New Roof Curb for Indirect Fired Gas Heating Products Models: GRAA, GRBA, GRCA, GRDA, GREA, GRGA American Standard Company 1996 Since the Trane Company has a policy of continuous product improvement, it reserves the right to change specifications and design without notice. The installation and servicing of the equipment referred to in this booklet should be done by qualified, experienced technicians.

2 Table of Contents WARNING This manual, including the warnings and cautions inside, must be carefully read and followed by all persons who use or maintain this product, including those who have any responsibility involving its selection, application, service or repair. This unit will perform as designed only if used and maintained according to the instructions. Otherwise, it could fail to perform as designed and persons who rely on this product could sustain serious personal injury or death. Page Description 3 General Information 3 Receiving Instructions 3 iterature Change History 3 Warnings and Cautions 4 Arrangements B (10-80), C (10-40), D (10-80), E (10-40), G (20-40) 9 Arrangements C (50-80), E (50-80), G (50-12), (20-12), K (10-80), (10-80) 14 Ductwork Connection Note: Digit 14 in the Model Number determines the arrangement of the unit. Arrangement Unit Size Dimensional Data B = Blower (Standard) C = Blower (Standard) Plenum D = Blower (Standard) Evaporative Cooler E = Blower (Standard) Evaporative Cooler/Plenum G = Blower (High CFM) = Blower (High CFM) Plenum K = Blower (High CFM) Cooling = Blower (High CFM) Cooling / Plenum Roof Opening Roof Curb Assembly Curb Spec s Page 4 Page 5 Page 6 Page Page 4 Page 5 Page 6 Page Page 4 Page 5 Page 6 Page Page 9 Page 10 Page 11 Page Page 4 Page 5 Page 6 Page Page 4 Page 5 Page 6 Page Page 4 Page 5 Page 6 Page Page 9 Page 10 Page 11 Page Page 4 Page 5 Page 6 Page Page 9 Page 10 Page 11 Page Page 9 Page 10 Page 11 Page Page 9 Page 10 Page 11 Page Page 9 Page 10 Page 11 Page Page 9 Page 10 Page 11 Page Page 9 Page 10 Page 11 Page Page 9 Page 10 Page 11 Page Page 9 Page 10 Page 11 Page Page 9 Page 10 Page 11 Page 13 Ductwork Connection Page 14 2 GRAA-IN-1

3 General Information Attention Read these instructions carefully prior to installing this equipment. Check all specifications and make sure the appropriate equipment is being installed. Retain this manual for future reference! WARNING! Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death. Read the installation instructions thoroughly before installing or servicing this equipment. Receiving Instructions Inspect the shipment immediately when received to determine if any damage has occurred to the unit during shipment. After the Roof Curb has been unpacked, check for any visible damage to the parts. If any damage is found, the consignee should sign the bill of lading indicating such damage and immediately file claim for the damage with the transportation company. iterature Change History GRAA-IN-1 (December 1996) Original installation manual for roof curb. Warnings and Cautions Warnings and cautions appear at appropriate intervals throughout this manual. Warnings! alert the equipment rigger, owner/operator and service personnel to potential hazards that could result in personal injury or death. Cautions: are provided to alert personnel to conditions that may result in equipment or property damage. GRAA-IN-1 3

4 Arrangement Capacity B C D E G Figure 1 - Dimensions Roof Curbs for arrangements D and E include an evaporative cooler platform. See GRAA-IN-2. Roof Curbs ship knocked down for ease of handling and storage. The field assembly and mounting of the curb to the roof is the responsibility of the installer. All curbs ship complete with pre-assembled side and end rails, cross member supports, ductwork connector brackets, hardware, optional insulation and gasketing. See Figures 3, 17, and 18 for a complete parts list for your curb. Check to see that all components are included. Refer to Figures 3, 4, 5, 6, 17, and 18 to see if all other field supplied parts are also on hand. Provide a suitable opening, or two openings, in the roof as suggested per Figures 2 & 4. These return and/or supply air ductwork openings have been calculated to include a one inch clearance on each side of the ductwork. The installer may determine other opening(s) to accept return and/or supply air ducts to suit particular needs. Dimensional Data Capacity W+ B+ * R A Capacity F+ H+ + 10, /16 (672) 30-3/16 (767) 20,25, /16 (951) 41-3/16 (1046) 30,35,60, /16 (1230) 52-3/16 (605) B D 29-5/8 (752) 29-5/8 (752) 71-1/8 (1807) 71-1/8 (1807) 67-3/8 (1711) 67-3/8 (1711) 40, /16 (1370) 57-11/16 (1465) Approximate Roof Curb Weights * R A Capacity 10,15 20,25,50 30,35,60,70 40,80 B D B C D E G 20 thru 40 NA B C D E G 20 thru /8 (752) 29-5/8 (752) 37-3/16 (945) 97-1/8 (2467) 97-1/8 (2467) 107-5/16 (2726) Notes: * RA = Rooftop Arrangement + Dimensions are in inches. (Dimensions in parenthesis are in millimeters.) 1 lb. = kg NA = Not Applicable 93-3/8 (2372) 93-3/8 (2372) 103-9/16 (2630) 4 GRAA-IN-1

5 Section X-X WARNING! To avoid any property damage or personal injury, it is the installer s responsibility to make sure that the installation will not impair the function of this curb, or the unit to be installed. All curbs must be mounted on level areas. The roof must be suitable to support the weight of both the curb and the unit to be mounted. The enclosed area of the roof curb must comply to required clearances to combustible materials. If the roof construction is made of combustible materials, the enclosed roof curb area must meet the following requirements: 1. Ventilate this area. 2. eave area open (however, this may elevate higher sound levels). 3. Cover this area with non-combustible material, which utilizes an R value of 5.0 minimum. Figure 2 - Roof Opening Specifications 20-7/8" (530mm) Return Air Opening A* 20-7/8" (530mm) Supply Air Opening E* Position and assemble the curb, referring to Figures 1 thru 8, 17 and 18 and the following procedure: 1. All hardware used for these assembly procedures is included with your curb, and should be used. Do not tighten any hardware until the curb is completely level and square, and installed in a suitable position on the roof, with proper alignment to the roof/unit opening(s). 2. Position and install the end and side curb rail sub-assemblies, aligning around the roof opening location(s). 3. Position and install the inner cross brace(s) and ductwork brackets as shown. 4. Secure the roof curb to the roof decking. 5. Install the field supplied flashing/ materials. 6. Apply the gasketing (included with the kit) on the top flanges/ surfaces of the curb as shown. WARNING! To avoid any property damage or personal injury, it is the installer s responsibility that the roof curb and unit must be completely sealed, preventing any water or air leakage/damage. Capacity Dimension E * (mm) Section Y-Y * Dimension A applies to the distance between roof openings (only on units with a supply plenum: also refer to Figure 4). Refer to Figure 4 for Section X-X and Y-Y details. RA* = Rooftop Arrangement RA * Capacity A ** (mm) C 50-7/8 " (1292) E 50-7/8" (1292) 10/15 20/25/50 30/35/60/70 40/80 26" (660) 37" (940) 48" (1219) 53-1/2" (1359) Note: All roof opening dimensions shown have been calculated to include one inch (25mm) clearance on each side of the ductwork openings. GRAA-IN-1 5

6 Figure 3 - Roof Curb Assembly * * The roof curb and destined unit must be sealed completely to prevent any water or air leakages (also see Figure 8). Refer to Figures 17 and 18 for Ductwork Mounting Bracket Assembly. 1 Curb Rail Assembly Side 2 Curb Rail Assembly End 3 Cross Brace Curb Bolt 3/8-16 x 1" G. Hex Hd. 4 (8) Req d. 3/8-16 x 1" G. Hex Nyloc Nut 5 (8) Req d. 1/4-14 x 5/8 G. Hex Washer 6 Hd. Sheet Metal Screw Type AB (8) Req d. Screw #10 x 5/8" G. Pan 7 Hd. Type AB (8) Req d. 8 Gasket 6 GRAA-IN-1

7 Figure 4 - Roof Curb Application (Also refer to Figures 2, 5 and 6) Section Y - Y Section X - X RA* Capacity B+ C, E C, E 18-7/8 (479) 19-3/8 (492) Notes: RA* = Rooftop Arrangement + Dimensions are in inches. (Dimensions in parenthesis are in millimeters.) 1 lb. = kg NA = Not Applicable Figure 5 - Detail D Figure 6 - Detail E GRAA-IN-1 7

8 Figure 7 - Curb Specifications Figure 8 - Unit/Curb Rail Assembly For Field Installations: These Cross Brace/Curb Adapters (two adapters ship with each rooftop unit) must be repositioned when the unit is mounted on a curb or platform (one for each end). Simply remove the screws, turn the piece over (end for end) and secure in place using the holes/hardware provided. All joints and seams must be sealed completely to prevent leaks. 8 GRAA-IN-1

9 Arrangement Capacity C E G K Figure 9 - Dimensions Roof Curbs for arrangements D and E include an evaporative cooler platform. See GRAA-IN-2. Roof Curbs ship knocked down for ease of handling and storage. The field assembly and mounting of the curb to the roof is the responsibility of the installer. All curbs ship complete with pre-assembled side and end rails, cross member supports, ductwork connector brackets, hardware, insulation and gasketing. See Figures 11, 17, and 18 for a complete parts list for your curb. Check to see that all components are included. Refer to Figures 11 thru 18 to see if all other field supplied parts are also on hand. Provide a suitable opening, or two openings, in the roof as suggested per Figures 10 and 12. These return and/or supply air ductwork openings have been calculated to include a one inch clearance on each side of the ductwork. The installer may determine other opening(s) to accept return and/or supply air ducts to suit particular needs. Dimensional Data Capacity W+ B+ 10, /16 (672) 30-3/16 (767) 20,25, /16 (951) 41-3/16 (1046) RA* Capacity F+ H+ + G K 20 thru /8 (943) 133-1/4 (3385) 129-1/2 (3289) 30,35,60, /16 (1230) 52-3/16 (605) 40,80, /16 (1370) 57-11/16 (1465) C E 30-7/8 (765) 123 (3124) 119-1/4 (3029) Approximate Roof Curb Weights RA* Capacity 10,15 20,25,50 30,35,60,70 40,80,12 G K 20 thru C NA E NA G & K G & K /16 (948) 36-15/16 (938) Notes: RA* = Rooftop Arrangement + Dimensions are in inches. (Dimensions in parenthesis are in millimeters.) 1 lb. = kg NA = Not Applicable 159-5/16 (4046) 185-5/16 (4707) 155-9/16 (3951) 181-9/16 (4612) 12 NA GRAA-IN-1 9

10 WARNING! Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death. Read the installation instructions thoroughly before installing or servicing this equipment. Figure 10 - Roof Opening Specifications 20-7/8" (530mm) Section X-X Return Air Opening WARNING! To avoid any property damage or personal injury, it is the installer s responsibility to make sure that the installation will not impair the function of this curb, or the unit to be installed. All curbs must be mounted on level areas. The roof must be suitable to support the weight of both the curb and the unit to be mounted. The enclosed area of the roof curb must comply to required clearances to combustible materials. If the roof construction is made of combustible materials, the enclosed roof curb area must meet the following requirements: 1. Ventilate this area; 2. eave area open (however, this may elevate higher sound levels); 3. Cover this area with non-combustible material, which utilizes an R value of 5.0 minimum. A* Section Y-Y 20-7/8" (530mm) Supply Air Opening E* Position and assemble the curb, referring to Figures 9 through 18, and the following procedure: 1. All hardware used for these assembly procedures is included with your curb, and should be used. Do not tighten any hardware until the curb is completely level and square, and installed in a suitable position on the roof, with proper alignment to the roof/unit opening(s). 2. Position and install the end and side curb rail sub-assemblies, aligning around the roof opening location(s). 3. Position and install the inner cross brace(s) and ductwork brackets as shown. 4. Secure the roof curb to the roof decking. 5. Install the field supplied flashing/ materials. 6. Apply the gasketing (included with the kit) on the top flanges/surfaces of the curb as shown. WARNING! To avoid any property damage or personal injury, it is the installer s responsibility that the roof curb and unit must be completely sealed, preventing any water or air leakage/damage. Capacity 10/15 Dimension E * (mm) 26" (660) * RA = Rooftop Arrangement ** Dimension A applies to the distance between roof openings (only on units with a supply plenum: also refer to Figure 12). Refer to Figure 12 for Section X-X and Y-Y details. RA * Capacity A ** (mm) 20 thru /16 " (2211) C & E 76-7/8" (1952) " (2871) 139" (3531) 20/25/50 30/35/60/70 40/80/12 37" (940) 48" (1219) 53-1/2" (1359) * All roof opening dimensions shown have been calculated to include a one inch clearance on each side of the ductwork opening. 10 GRAA-IN-1

11 Figure 11 - Roof Curb Assembly * * The roof curb and destined unit must be sealed completely to prevent any water or air leakages (also see Figure 16). Refer to Figures 17 and 18 for Ductwork Mounting Bracket Assembly. 1 Curb Rail Assembly Side (.H.) 2 Curb Rail Assembly Side (R.H.) 3 Curb Rail Assembly End 4 Cross Brace Curb 5 Connector Curb Bolt 3/8-16 x 1" G. Hex Hd. 6 (16) Req d. 3/8-16 x 1" G. Hex Nyloc Nut 7 (16) Req d. 1/4-14 x 5/8 G. Hex Washer 8 Hd. Sheet Metal Screw Type AB (8) Req d. Screw #10 x 5/8" G. Pan Hd. 9 Type AB (8) Req d. 10 Gasket GRAA-IN-1 11

12 Figure 12 - Roof Curb Application (Also refer to Figures 10, 13 and 14) Section Y - Y Section X - X RA* Capacity B+ C, E 19-3/8 (492) /8 (479) Notes: RA* = Rooftop Arrangement + Dimensions are in inches. (Dimensions in parenthesis are in millimeters.) 1 lb. = kg NA = Not Applicable 20 thru /8 (486) 19-1/4 (489) Figure 13 - Detail D Figure 14 - Detail E 12 GRAA-IN-1

13 Figure 15 - Curb Specifications Figure 16 - Unit/Curb Rail Assembly For Field Installations: These Cross Brace/Curb Adapters (two adapters ship with each rooftop unit) must be repositioned when the unit is mounted on a curb or platform (one for each end). Simply remove the screws, turn the piece over (end for end) and secure in place using the holes/hardware provided. All joints and seams must be sealed completely to prevent leaks. GRAA-IN-1 13

14 Ductwork Connections Figure 17 - Return Air Ductwork Mounting Bracket Assembly 1 Roof Mounting Angle 2 Curb End Rail Channel Screw #10 x 5/8" G. Pan Hd. 3 Type AB (8) Req d. 4 Fasteners by Others ( B ) Req d Figure 18 - Supply Air Ductwork Mounting Bracket Assembly RA* Capacity A+ C, E C, E 18-7/8 (479) 19-3/8 (492) /8 (479) 20 thru /8 (486) 19-1/4 (489) 1 Curb Cross Brace Channel Notes: RA* = Rooftop Arrangement + Dimensions are in inches. (Dimensions in parenthesis are in millimeters.) 1 lb. = kg NA = Not Applicable 2 Curb Side Rail Channel 3 Curb End Rail Channel 4 Screw #10 x 5/8" G. Pan Hd. Type AB (8) Req d. 14 GRAA-IN-1