Modine Roof Curb, Discharge and Return Air Connector Installation & submittal data
Below you will find brief information for Roof Curb, Discharge and Return Air Connector. This document guides users on the correct installation and submittal of roof curbs and discharge and/or return air connectors designed for Modine gas-fired weatherproof duct furnace/make-up air units. It covers installation instructions, dimensions, and assembly procedures.
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5-590.4 5H76358A Rev.D September, 2006 installation & submittal data roof curb and discharge and/or return air connectors gas-fired weatherproof duct furnace/make-up air units model series: “H” & “O” Application A roof curb installation is designed to provide a watertight method for mounting an outdoor heating, ventilating, and/or cooling unit on the roof of a building. The roof curb also raises the height of the unit to prevent snow build-up below fresh air inlet opening. Figure 1.1 Typical Curb Details with Unit Installed over Areas where Sound is Not Critical Counterflashing (By Others) Installation Instructions 1. 2. 3. 4. 5. Roof curbs are fabricated from 16 gauge galvanized steel and supplied knocked down for assembly on the job site. The curb consists of two side pieces, two end pieces, curb gasketing, four joiner angles, four 2x4 inch wood nailing strips, nuts, bolts, and washers. Roof curbs over 120 inches long include two additional side pieces and two splice plates. Outside dimensions must be held when installing curb. Refer to page 2 for dimensions. All dimensions are ± 1/8 inch. Top surface must be level and straight to insure weathertightness. All corners must be square. Final electric and gas connections must be made after unit is installed to allow for tolerance in setting of unit on curb. For electrical power supply allow approximately eight feet of wire, plus provisions for weathertight flexible conduit for connection to unit, as required by local codes. Maintain a 12 inch minimum height from top of roof deck to top of curb. If discharge and/or return air connectors were included, refer to page 3 for installation and orientation instructions. Wooden Nailing Strip (By Modine) Roofing Material (By Others) Curb (By Modine) Insulation (By Others) 2" Acoustic Fiberglass (By Others) Cant Strip (By Others) Roof Insulation (By Others) Roof Truss 6" Inverted Channel Both Sides (By Others) Roof Deck Figure 1.2 Installation and Construction Method Curb Gasketeting (Supplied with Curb Kit) Base of unit Roof Curb Metal Flashing Extends under Cap* 2x4 Wood Nailing Strips Supplied (Supplied with Curb Kit) Roofing Membrane* * BY INSTALLER 1.75 6.00 Base* Cant Strip* Roof Deck* Caulk Butt Joints after Curb is Assembled and Installed on Roof Structural Members and Roof Flashing is Added Insulation* 16.00 dimensions - roof curbs Figure 2.1 Roof Curb Dimensions 1.68 1.75 TYP E RG HA G ISC NIN E DOPE D I S IN AIR H 24.00 INSIDE OPENING G 24 .94 16.00 1.00 TYP J 5.5 3 GAS LINE CONN. (LH ASSY ONLY) 5.5 3 GAS LINE CONN. (RH ASSY ONLY) D 2.9 7T YP H B IN SID E A C Ou TS 24.00 INSIDE OPENING ELECT. BOTT PAN CONN. RN Tu G RE NIN IDE PE INS IR O A 1.79 G 3 2.0SPAC 0 = ES 6.0 AT 0( TY P ) ID E 44 .16 E SID F IN E E ID TS Ou Discharge Air Opening is for HDG/HDP/HPG/HPP/ODG/ODP/OPG/OPP models only Table 2.1 - HBG/HBP/OBG/OBP & HDG/HDP/ODG/ODP Roof Curb Dimensions (All dimensions in inches) ModelBlower Type HBG/HBP/OBG/OBP Size 75 100/125 150/175 200/225 250/300 250/300 350/400 350/400 500/600 500/600 700/800 700/800 840/960 (Digit 16)AB All All All All E,F,G, or H I, J, or K E,F,G, or H I, J, or K G or H I, J, K, or L G or H I, J, K, or L I, J, K, or L 88.77 88.77 88.77 88.77 88.77 124.61 88.77 124.61 121.89 157.74 121.89 157.74 191.14 Dimensions HDG/HDP/ODG/ODP CDAB 76.77 - 76.77 - 76.77 - 76.77 - 76.77 - 112.61 - 76.77 - 112.61 - 109.89 - 145.74 105.98 109.89 - 145.74 105.98 179.14 105.98 - - - - - - - - - 39.76 - 39.76 73.16 117.98 117.98 117.98 117.98 117.98 153.83 117.98 153.83 151.10 186.98 151.10 186.98 220.39 105.98 105.98 105.98 105.98 105.98 141.63 105.98 141.63 139.10 174.98 139.10 174.98 208.39 HBG/HBP/HDG/HDP/OBG/OBP/ODG/ODP CDE - - - - - 105.98 - 105.98 105.98 105.98 105.98 105.98 105.98 - - - - - 35.85 - 35.85 33.12 69.00 33.12 69.00 102.41 39.33 41.84 46.18 48.22 51.25 51.25 62.76 62.76 51.25 51.25 62.76 62.76 62.76 F G H J➀ 27.33 29.84 34.18 36.22 39.25 39.25 50.76 50.76 39.25 39.25 50.76 50.76 50.76 3.97 5.22 5.41 6.43 4.96 4.96 4.74 4.74 4.96 4.96 4.74 4.74 4.74 19.52 19.52 23.49 23.49 29.46 29.46 41.40 41.40 29.46 29.46 41.40 41.40 41.40 74.84 74.84 74.84 74.84 74.84 110.41 74.84 110.41 74.84 110.41 74.84 110.41 110.41 Table 2.2 - HCG/HCP/OCG/OCP & HPG/HPP/OPG/OPP Roof Curb Dimensions (All dimensions in inches) ModelBlower Type HCG/HCP/OCG/OCP Size ➀ 75 100/125 150/175 200/225 250/300 250/300 350/400 350/400 (Digit 16)AB All All All All E,F,G, or H I, J, or K E,F,G, or H I, J, or K 112.74 112.74 112.74 112.74 112.74 148.59 112.74 148.59 Dimensions HPG/HPP/OPG/OPP CDAB 100.74 - 100.74 - 100.74 - 100.74 - 100.74 - 136.59 105.98 100.74 - 136.59 105.98 - - - - - 30.61 - 30.61 141.98 141.98 141.98 141.98 141.98 177.83 141.98 177.83 129.98 129.98 129.98 129.98 129.98 165.83 129.98 165.83 100.74 100.74 100.74 100.74 100.74 105.98 100.74 105.98 Gas connection for 1st furnace. For Models 500-800 add 33.5” for second furnace gas connection. For Model 840-960 add 33.50” and 67.00” for second and third furnace gas connections. 5-590.4 HCG/HCP/HPG/HPP/OCG/OCP/OPG/OPP CDE 29.24 29.24 29.24 29.24 29.24 59.85 29.24 59.85 39.33 41.84 46.18 48.22 51.25 51.25 62.76 62.76 F G H J 27.33 29.84 34.18 36.22 39.25 39.25 50.76 50.76 3.97 5.22 5.41 6.43 4.96 4.96 4.74 4.74 19.52 19.52 23.49 23.49 29.46 29.46 41.40 41.40 74.84 74.84 74.84 74.84 74.84 110.41 74.84 110.41 discharge and/or return air connectors Application Figure 3.2 - Mounting Hole Locations Discharge and/or return air connectors are used in conjunction with the roof curb and allow the discharge and/or return air ductwork connections to be made before the unit arrives at the job site. When installed in the roof curb, the connectors create a mating surface at the height of the bottom of the blower and/or downturn plenum sections. After caulking the mating surfaces, the installed unit weight holds the bottom of the unit to the connectors so that no additional fastening method is required. Some curbs may have additional holes. Always use dimensioned holes for mounting connectors. 4.30 2.80 Discharge and/or Return Air Connector mounting holes Components of kit: Duct Connector Spreader (2) Duct Connector Cross-Channel (2) Plain Washers, Locknuts, and Screws (16) 1.41 25.11 Installation Instructions 1. 2. 3. 4. 5. 6. Assemble the roof curb as instructed on page 1. Assemble the discharge and/or return air connector(s) as shown in Figure 3.1. All dimensions are ± 1/8 inch. Top surface must be level and straight to insure airtight connection. All corners must be square. Determine the proper side of the roof curb on which to install the connector based configuration of the ordered unit. Locate the connector mounting holes in the roof curb. See Figure 3.2. When installing only one connector, it is important to determine the proper side of the roof curb on which to install the connector. The location of the duct connector must match the configuration of the ordered unit. (Example: If a discharge air connector is being installed, insure that the connector is installed on the discharge end of the roof curb. The unit orientation must be determined by the building plans.) Install the duct connector using the remaining nuts, screws and washers. See Figure 3.3. Insert the 90° flanged ductwork (by others) into the connector as shown in Figure 3.4. Once the ductwork is inserted, fasten the ductwork to the connector assembly sides (from inside the ductwork) using horizontally driven sheet metal screws (by others). Prior to unit installation, caulk the top of the roof and the connector(s). Figure 3.3 - Duct Connector Installation locknuts washers screws Figure 3.4 - Field Supplied Ductwork Installation Figure 3.1 Duct Connector Assembly caulk surfaces prior to unit installation Model SizeA 75/100/125 150-225 250-300 350-400 500-600 700-800 840-960 19.52 23.49 29.46 41.40 29.46 41.40 41.40 field supplied duct work A 24.36 LOCKNuTS WASHERS SCREWS 5-590.4 Commercial HVAC&R Division • Modine Manufacturing Company • 1500 DeKoven Avenue • Racine, Wisconsin 53403-2552 “H” Model Series - Phone: 1.800.828.4328 (HEAT) • Fax: 1.800.204.6011 “O” Model Series - Phone: 1.866.823.1631 (Toll Free) • Fax: 1.800.204.6011 © 2006 Modine Manufacturing Company 5-590.4 8/06 - .1M Litho in USA
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Key Features
- Weathertight Installation
- Modular Design
- Pre-Assembled Components
- Supports Discharge and Return Air Connections
- Ensures a Secure and Leak-Free Connection
- Compatible with Modine Gas-Fired Furnaces
- Includes Installation Instructions
- Designed for Easy Assembly & Installation
- Raised Unit Height Prevents Snow Build-Up
Frequently Answers and Questions
What are the dimensions of the roof curbs?
Refer to Figure 2.1 and Tables 2.1 and 2.2 for dimensions.
How do I install the discharge and/or return air connectors?
Always use dimensioned holes for mounting connectors. Refer to Figure 3.2 for location and Figure 3.3 for installation instructions.
What is the minimum height required from the top of the roof deck to the top of the curb?
A 12 inch minimum height is required.
Do I need to make any electrical connections before installing the unit?
Yes, Final electric and gas connections must be made after the unit is installed to allow for tolerance in setting the unit on the curb. Allow approximately eight feet of wire, plus provisions for weathertight flexible conduit for connection to the unit, as required by local codes.
What are the installation instructions for the roof curb?
The roof curb consists of two side pieces, two end pieces, curb gasketing, four joiner angles, four 2x4 inch wood nailing strips, nuts, bolts, and washers. Refer to page 1 for further assembly instructions.
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