They check the location of the duct in reference to the location of the duct connection on the unit. Norton says that he and his service department have seen numerous cases in which rooftop units were not installed properly. Most of the time natural gas is used but a unit can also use propane. And there’s no factory start-up involvement from a vfd when it’s bought through an alliance partner, versus being name brand and factory start-up included.”, “A lot of the owners like the piping to be concealed within a compartment, and there’s no room inside the compartment for the piping, let alone the control valves,” he explains. Especially the economizer sections; they need to be factory installed, factory wired, and they do not need to ship loose.”. Impack units are easy to install and deliver high efficiency heating and cooling in single units. Visit our updated, This website requires certain cookies to work and uses other cookies to help you have the best experience. I want to hear from you. The unit must be GROUNDED to prevent possible hazard due to insulation failure. If things aren’t level, “You end up with condensate not properly draining out of the pan, which can cause some humidity problems as well as environmental problems in the space. “If it’s a chilled water system with a rooftop application, the pipe vestibules are about one-third the size they need to be.”. 3. Many contractors have definite preferences as to which types of rooftop units they like to install. WARNING: Even if the unit has been switched off, the power circuit remains energized, unless the unit or circuit disconnect switch is open. The rooftop unit may be mounted immediately after the curb is installed. If they’ve done it once, they’ve done it a hundred times, and they know the general game plan: Cut a hole in the roof, put in a curb, put down the unit, hook up the ductwork, and you’re good to go. Tell me how we can improve. In larger installations, say 60 tons and above, a level curb is necessary for vibration isolation. We get the curb and the isolation rails set in advance of the unit delivery. The accessibility of replacement components needs to be considered when units are designed and manufactured. When the installation is on an existing building, hoist the shipping container directly onto the roof. DWG14. %%EOF “A vibration isolation rail has to be installed on a well-supported and level curb. They check the inside of the curb to see if there’s any problem with the sound batting. However, some manufacturers allow you to incorporate additional requirements such as blenders, special filtration, sound attenuators, and other specialty equipment as part of the factory-tested package. Visit our updated. We’re also seeing more electrical components where the wiring and the fusing is not properly sized, and we’re having to make field changes to correct that.”, In addition, Norton says that some manufacturers are using low-cost condenser fans on rooftop units, causing more blade failures. If it’s not, the unit then will tilt one direction or the other and the weight will shift, and you don’t end up having any isolation.”. At Budget Heating and Air Conditioning Inc., we are proud to be the leader in HVAC supplies, parts and equipment. Joanna has been with BNP Media since 1991, first heading up the company’s technical book division. Supply and Return Air Ductwork All ductwork must be run and attached to the curb before the unit is set into place. Copyright ©2021. Norton believes that many rooftop installations are done incorrectly simply because contractors are not well prepared. We’re seeing more and more units come out of the factory that have not been piped correctly. With a 3-150 ton capacity range and efficiency ratings as high as 17.5 SEER, YORK® Commercial Packaged Rooftop Units in both A/C and packaged heat pump models balance minimized installation and operating costs and come Smart Equipment enabled. Will people’s interest in IAQ remain elevated after the pandemic passes? She can be contacted at 248-786-1707 or joannaturpin@achrnews.com. Do not walk on the roof panels of units installed. To ensure proper duct SINGLE PACKAGE ROOFTOP 48HC gas heater pdf manual download. ... CAD download: library block blok family symbol detail part element entourage cell drawing category collection free. %PDF-1.6 %���� Switch off the supply voltage using the main disconnect switch of the Rooftop. COVID-19 has boosted customer interest in IAQ solutions. Look for rooftop units that encourage rather than discourage maintenance by demanding convenient access to both sides of component sections using hinged and latched doors. Please Note: Drawings below are generic details to show design intent only. This is important for all roof types. Available in PDF and DWG formats for download or print. And when they’re done with the installation, employees in Colonial Mechanical’s service department go through a checklist to make sure it was done correctly. Prodigy® 2.0 (M3 Unit Controller) GP3 Control (Repair Part) (13J79) Prodigy® 2.0 (M3 Unit Controller) GP3 Control Field Installation Kit (13J78) Prodigy® 2.0 (M3 Unit Controller) Replacement Cover (10X86) Prodigy® 2.0 (M3 Unit Controller) Setup Guide for Compatible Rooftop Units; Prodigy® (M2 Unit Controller) Firmware Update “Many times the units arrive, the curbs have not been checked, and the crane is sitting on-site. Each detail is available in PDF and AutoCAD (DWG) formats, go to our secure FTP site (do NOT use Internet Explorer, use another browser) for the DWG format drawings.. Packaged Rooftop Units, Heat Pumps, & Outdoor Air Handling Units Installation, Operation, & Maintenance o Do not store gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance o WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance. Then we wait for the unit to come in,” says Norton. Block: Rooftop AC Unit (HVAC) Block #9060 « back to Catalog. It supports the rooftop unit and transfers the load onto the roof’s structural members, streamlines ductwork connections, and provides the means to complete the weatherproof seal with the roof. View and Download Carrier SINGLE PACKAGE ROOFTOP 48HC installation instructions manual online. Single 3-Way Water Coil Piping Detail with 3-Way Control Valve. No matter how well an installation goes, there still can be problems with the rooftop unit itself. Those loose parts that do arrive intact take more time to install, wire, and troubleshoot in the field. These apply to Gas-Electric, Electric-Electric and Heat Pump units. operations on the unit, lock the power supply circuit in the open position ahead of the machine. TIL Feedback - we welcome your suggestions at til@va.gov. h�bbd``b`^$O -�)�`�I���2OL] �,k��IJ �� �^7 HH�X;2�ހe`�=���N 7�?��!� ��� In addition to the concerns mentioned in the article about the quality of rooftop units, Robert Norton sees three problem areas: Restaurant Owners Hang Hopes on IAQ Solutions, Manufacturers Optimistic Over Heat Pump Outlook for the Upcoming Year, Refrigerant Concerns Top Agendas at Industry Events, California Approves Rules To Phase Down HFCs, Regular service keeps rooftop units in tip-top shape, Rooftop Units Designed To Help Improve IAQ, Rooftop Units Offer Advanced Ventilation Control. 0 He says that many times parts that are shipped loose are lost altogether, which usually requires the crews to go back and do another service call after the equipment is installed. So with a little planning, some hard labor, and a well-designed rooftop unit, your customers are going to be thrilled with their comfort levels. Elevation Views of Rooftop ACU. Norton says that some manufacturers also seem to be cutting corners on their rooftop units, which is causing Colonial Mechanical’s service department some trouble. “Any time anything ships loose from a rooftop unit, that’s a problem for the contractor. She obtained her bachelor’s degree in English from the University of Washington and worked on her master’s degree in technical communication at Eastern Michigan University. Sanitary Cleanout Detail. “We’re seeing a tremendous amount of motor failure where the motors are undersized on the condenser fans, which is something we never used to see. “Manufacturers need to have better quality control checks on their refrigeration circuits. Disconnect from the main power supply before servicing the air conditioner unit. Cooling-only, heat-only or combined units with dual fuel, heat pump and gas-electric options. material gage to support the unit load will be furnished with the curb. For example, they make sure a large enough crane will be available. Unit may have more than one power switch. Pedestals Wood Tiles 2CM Pavers Paver Trays Site Furnishings From multi-family, mixed-use, government facilities, healthcare, and more – Bison Innovative Products offer the design flexibility to create versatile, unique outdoor spaces. INSTALLATION MANUAL CAUTION: READ ALL SAFETY GUIDES BEFORE YOU BEGIN TO INSTALL YOUR UNIT. Robert Norton of Colonial Mechanical, Richmond, VA, has seen more rooftop units in his lifetime than he’d probably care to admit. All power supplies to the unit must be completed, before any work can be carried out. Again, it’s in an effort to save money and lower the cost of the components — they’re losing control of the quality of the unit.”. 110 0 obj <>/Filter/FlateDecode/ID[<3485B043B22EA00182FB71DAA6BC3F73><17D9DC07C64C874EB518F3C8C15DB0B3>]/Index[92 104]/Info 91 0 R/Length 94/Prev 549717/Root 93 0 R/Size 196/Type/XRef/W[1 2 1]>>stream On-board controls support cloud-based data analytics, including fault detection, to support proactive maintenance and minimize downtime. Active Ventilation - Click to view drawings for all of our products. A Year-round rooftop unit is a package unit with a gas heating section. 9. Every YORK® Small Sunline Packaged Rooftop Unit comes standard with next-generation Smart Equipment and can connect seamlessly to a controls systems and self-discover other Smart Equipment. You must have JavaScript enabled to enjoy a limited number of articles over the next 30 days. Is your roof covered by a … It’s just lack of planning on the contractor’s part.”. And, a permanent lamicoid type label shall be installed at both the receptacle and the main disconnect for each rooftop unit indicating –“ CAUTION “ - Two separate power sources –XXX V for Rooftop unit and 120 V for maintenance receptacle” Adjust wording on the Caution label as required for appropriate voltage of the rooftop unit. The curb installation is critical to ensure a level installation. HVAC Heat Exchangers Explained The basics working principle how heat exchanger works - Duration: 19:17. The roof curb should be installed by an experienced erector. Everyday needs, such as variable-frequency drives, economizers, and control valves, should come as part of the factory-tested package. Lower operating costs or standards such as LEED, include requirements for new, low GWP refrigerants, and create the need for products to … Rooftop units are a fact of life in a densely populated city, whether you are a residential client or the owner of a retail warehouse. All electrical wiring must not touch the refrigerant piping, or any moving parts of the fan motors. Daikin RoofPak applied packaged rooftop systems, from 15 to 150 tons, are the ideal solution for your one to eight-story building projects. Design, CMS, Hosting & Web Development :: ePublishing. Only sufficiently qualified personel is allowed to work on (electrical) components. Then typically we cap that entire enclosure with some type of sheet metal to protect it. The Engineering Mindset 130,957 views The tables below contain downloadable standard design detail drawings for typical Unistrut applications–medical supports, rooftop walkways, and ceiling grid systems. But the truth of the matter is that a really good rooftop installation involves some finesse. To ensure that doesn’t happen on any of their jobs, Colonial Mechanical’s crews make sure everything is planned well in advance. It’s not good enough to just show up on the roof and hope that the unit and everything else will be there when you arrive. Packaged Rooftop – Gas/ Electric 121/2 – 25 Tons, 60/50Hz Air Conditioners. Norton says that some manufacturers’ units are difficult to install because some of the components ship loose. It takes forethought. Single 2-Way Chilled Water Coil Piping Detail with 2-Way Control Valve. Confi rm that the unit has been switched OFF before installing or servicing the unit. Layers are used to separate unit outlines, clearances, dimensions, and connections. By closing this message or continuing to use our site, you agree to the use of cookies. It takes planning. Prior to setting the unit onto the curb, the installer should ensure that a sealing material is positioned between the unit and the curb to provide a watertight connection. They check the drain connection for the condensate. The roof curb is the interface between the building and the rooftop unit. The constant innovation in rooftop unit (RTU) design is driven by new demands for higher energy efficiency and local regulations. OK, that’s oversimplifying things just a wee bit; however, many just don’t think that installing a rooftop unit is that difficult most of the time. “As far as the overall value to the customer, we feel like if they would look at the serviceability of the unit, it would save the end user customer money over the long haul.”, “Right now I think they leave that up to their representatives versus the factory,” Norton says. 195 0 obj <>stream ... Rooftop Piping Support Detail. Specifications Prefabricated roof curb to be manufactured of prime galvanized steel construction, 20 , 18, 16 or 14 gauge as required, meeting ASTM A653/653M, with welded corners and with seams joined by continuous water and air tight welds. Serviceability: Rooftop units are mechanical systems that require periodic maintenance and service to maximize their service life and maintain peak performance. SAVE THIS MANUAL JOHNSON CONTROLS SERIES 40 ROOFTOP 25, 30 & 40 TON 5276177-JIM-D-0118 MODELS: V2 V3 V4 cat: HVAC. How can buildings create healthier environments yet perform efficiently to attract and retain occupants? endstream endobj startxref CAUTION CUT HAZARD Failure to follow this caution may result in personal injury. HUSHCORE™ Plus™ Acoustical Curb System BY RTU MANUFACTURER 1. RTU Base 2. Pre-engineered design flexibility: The more the design requirements for a project can be incorporated into the unit at the factory, the less field work you will face. Voyager YS 150–300 air conditioner pdf manual download. tions on the unit, always turn off main power switch to unit and install lock(s) and lockout tag(s). Pre-fabricated fully assembled roof curbs will reduce installation time and costs by ensuring compatibility between the rooftop unit, curb and roof openings. Please click here to continue without javascript.. Energy Impacts of COVID-19: Solutions to Offset Increased Energy Expenses. In order to save money, manufacturers seem to have made their products more difficult rather than easier to service. Roofi ng may be completed after All Rights Reserved BNP Media. While you may pay for this flexibility in initial equipment expense, you can make up the difference in reduced field coordination and installation costs while delivering a higher-quality installation to your customer. Look for rooftop units that encourage rather than discourage maintenance by demanding convenient access to both sides of component sections using hinged and latched doors. « back to Catalog 15 tons, first heading up the company s! Will be available sections ; they need to be the leader in supplies! 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