or less, insulation is not required for strainers, control valves, and balancing valves. Adhere insulation directly to the pipe every 12 to 18 feet, at the beginning and ends of run. It is often used on cold and hot water lines and refrigeration lines. VRF Wizard | Variable Refrigerant Flow Air Conditioning, VRF Project Video – Senior Living Facility, VRF Project Video – Shippensburg University, Installing VRF in a Senior Living Facility, VRV III Engineering & Installation manual, VRF Heat Recovery vs VRF Heat Pumps for Homes and Commercial Properties. The biggest impact is for the High Pressure Vapor side of the requirements. Here are a few examples of the improper application of insulation and what to avoid on your project. The inside of the aluminum pipe sleeve is coated with a poly moisture retarder that provides an excellent resistance to moisture and has excellent abrasion protection during installation. For every layer of Cryogel-Z insulation a vapor barrier is present. Heat Loss and Insulation - Heat loss from pipes, tubes and tanks - with and without insulation - foam, fiberglass, rockwool and more; Insulation - Heat transfer and heat loss from buildings and technical applications - heat transfer coefficients and insulation methods and to reduce energy consumption; Related Documents . You will find that the CMC & IECC codes along with ASHRAE standards require that insulation installed on the exterior of a building be protected from the sun’s UV rays and the weather. This will probably … This is what dictates the need for EPDM insulation (yes, fiberglass and others can meet this, but EPDM is the only insulation that is a closed cell continuous vapor barrier). All Product models, All serial numbers. // Field refrigerant piping and associated drain and condenser water piping for mortuary refrigerators, including required pipe insulation. Write CSS OR LESS and hit save. Your risk increases as your quality of installation varies from the manufactures recommendation, and as you deviate from the code requirements. Issue: Thank you for subscribing to updates from APC by Schneider Electric. 23 designed and installed refrigerant piping system should: • Provide adequate refrigerant flow to the evaporators, using practical refrigerant line sizes that limit pressure drop • Avoid trapping excessive oil so that the compressor has Refrigeration applications encompass a variety of operating temperatures, piping materials, space and environmental conditions, refrigerants and fluids – all of which impact insulation selection. ASHRAE Handbook -- Refrigeration Chapter: Insulation Systems for Refrigerant Piping. Sensors / Cameras / Licenses / Accessories. Here we describe defects in refrigerant piping insulation, problems caused by defective refrigerant piping insulation, recommended installation practices for refrigerant tubing insulation in building walls or cavities as well as outdoors where exposed to the weather, and interior leaks on & in wall below a split system air conditioner wall-mounted unit traced to missing insulation. Product Advantages . We are excited that you have joined the group. CTRL + SPACE for auto-complete. If the wrong insulation is installed or if the installation is done improperly, you could end up with water damage to the building, or if a leak goes un-noticed you might get mold growing somewhere. Avoid heat gains or losses. I haven’t seen an installation with this thickness of insulation applied as mandated by the Building Energy Efficiency Standards. Refrigerant Piping Oil Return Insulation to reduce heat gain and condensation Supports Code Issues Cutting Brazing Purging. One just has to look at the unprotected insulation that has been installed for several years to see the signs of degradation. Owens Corning® SSL II® with ASJ Max Fiberglas™ Pipe Insulation is molded out of heavy density resin bonded inorganic glass fiberglas that come in one-piece, 36" (914mm) long, hinged sections. You should review your model energy code or building codes for the requirements in your jurisdiction to see how they compare with this discussion. With energy codes getting stricter during each code cycle, and some large lawsuits related to refrigerant piping being improperly insulated, the need to get your insulation right is very important. Peak normal operating temperatures for heat-recovery systems are as follows; As can be seen, the temperatures for 3-pipe heat-recovery systems exceed 200˚F in normal operation. The purpose of this document is to provide a clear communication regarding insulating the external copper refrigerant lines. While condensation and moisture are known as culprits in mold growth, they also have a significant impact on system efficiency as moisture degrades the performance of the insulating material. Don’t clamp directly onto piping. refrigerant piping). Most of us know that these thicknesses aren’t getting installed, as I’ve seen installations where the contractor just buys the standard pre-insulated line-set similar to these by Mueller. My guess is never. With unslit tubular insulation, use a sharp knife to cut the insulation lengthwise on one side, as shown in Figure 12. Refrigerant piping insulation has historically escaped the scrutiny that it has found itself under recently in some jurisdictions. Maintain system capacity & efficiency. Flexible Rubber Foam Pipe Insulation Soft and easy to install, this insulation restricts absorption of water, air, and gas. A good example would be when running liquid refrigerant line through the attic area where temperature often exceed 110°F. 2. The integrity of your insulation will need to be maintained for the life of the mechanical system, so getting it right from the start is important. // //B.Refrigerant piping shall be sized, selected, and designed either by the equipment manufacturer or in strict accordance with the manufacturer’s published instructions. Also the pipe clamps were incorrectly attached directly to the pipes. All VRV/VRF manufacturers (that we’re aware of) require the insulation to withstand at least 248˚F. Installers need to be sure that they meet the VRF manufacturers recommended temperature rating for the insulation their installing. Refrigeration pipe insulation, or refrigerant piping insulation, plays a critical role in controlling heat gain of refrigerant fluids, moisture (vapor drive), surface condensation and icing. In defense of the regulatory officials, how are they to keep up with the wavering message about the temperature ratings of the insulation required by the various VRF manufactures. They have one thickness for both pipes, and don’t have one thick enough for most VRF manufactures requirements according to code. The insulation protector consists of resilient PVC material that is Class “A” fire/smoke rated, vapor retarder, anti-fungal, and anti-microbial. Crimping the insulation along its refrigerant tubing pathway creates points of less and possibly inadequate insulation. Click below to go to the Master List of all commercial resources. Carefully selected piping insulation is critical to the efficiency of a refrigeration system. Location of Insulation In Cooling System. 22 RED FLAG #1 • Copper Pipe-Blue Stripe. Enjoy! Maintain system capacity & efficiency. Using the 2016 Building Energy Efficiency Standards in California or the IECC as our example, we will cover how confusing it can be to get the correct insulation specified on your project. Cleanliness of all refrigeration piping is of the utmost importance in the installation procedure. LG in their literature on page 37 calls for a temperature rating of 227 F. You can see that knowing the VRF/VRV manufactures requirement for the temperature rating of the insulation can have an effect on the thickness of the insulation required for the same size of pipe in the system. We use cookies to provide you with a better onsite experience. Invest in the proper insulation and installation procedures to insure that you have thermal & vapor integrity for the life of your system. This is not what dictates insulation thickness. obviously the owner or management company didn’t keep up with the continuous application of protective coating from the UV rays or the weather. Its imperative that they install the correct insulation, with the correct thickness, and one that meets the temperature rating and exterior protection requirements. Good piping practices - with properly sized and installed lines as described in this section. Important note: these temperatures also dictate the thicknesses needed on insulated coils (line-sets) going to the fan coils. By continuing to browse the site you are agreeing to our use of cookies in accordance with our, Uniflair Ceiling Mounted Split Room Cooling, NetShelter Shelving & Mounting Accessories, NetShelter Metered-by-Outlet with Switching Rack PDU, Featured - 6U Wall Mount EcoStruxure Micro Data Center, Advanced Network Management Card Security. Insulated suction lines are completed by Schneider Electric’s. Avoid costly lawsuits. Use pipe inserts at Hangers/Attachments points to avoid insulation compression. Outdoor insulation should have UV and weather protection. Hence, insulation of equipment such as chilled pipes and air handling units plays an important role in ensuring optimal energy efficiency and fire safety in the global cold chain equipment market. Prevent condensation on piping or insulation. Prevent piping system corrosion; Prevent mold growth from occurring on construction materials. Daikin states in their VRV III Engineering & Installation manual on page 59 that pipe insulation is to be rated to with stand a temperature of 248 F. See insert below. If it was, all VRV/VRF manufacturer’s would require 2-1/2” on the high-pressure lines. No companies have listed products specifically related to this chapter's topic. Those VRF manufactures that have High Pressure Vapor operating temperature above 200 F would require 2-1/2” of insulation. Avoid heat gains or losses. Be aware of pipe expansion and the possible movement of the saddle off the support. What could possibly be such a big deal with plain old boring refrigerant piping insulation? I don’t know about you but I haven’t seen a lot of that being done. In addition, any heat that enters the refrigerant adds to the superheat and reduces system efficiency. VRF manufactures have specified in their engineering and installation manuals temperatures that any insulation used on their system must be rated for. In general there are no insulation thickness requirements for residential heating pipes, but we find that a minimum of 1" thickness is cost efficient in most scenarios. It does not deal with HVAC systems or applications such as chilled-water systems. Aluminum insulation jacketing is made out of .016" smooth aluminum that comes in 3 foot sections. How many owners or management companies do you know that re-coat their insulation every 2 to 4 years? The peak normal operating temperatures are what dictate insulation thickness in accordance with current state energy codes and/or ASHRAE 90.1. Use pipe saddles and shields to avoid crushing insulation. Cryogel-Z has an integral vapor barrier. Tundra Elbow Self-Seal system makes application easy and reduces insulation time. NPS. Avoid property damage from condensation. The insulated tape enables simple attachment of PVC pipe insulation on many plumbing systems. of insulation (such as mineral wool, fiberglass, or calcium silicate) will be required on all pipes except those with a size less than 1 in. To mitigate the risk requires that you use proper insulation and have it installed according to the manufactures requirements. Make sure surface is clean, dry, unheated or uncooled. Cause:. This is not to be considered legal advice, but is for the purposes of bringing to light the need to discuss with your contractor or city officials the proper application of the code covering insulation. Important note: this also applies to the need for EPDM on insulated coils (line-sets) going to the fan coils. Please enter a valid email address This document describes what is the purpose of Refrigerant Piping Insulation? Many of the VRF/VRV manufactures have listed temperatures well above the operating temperatures of your normal VRF system. 5. It can typically be found on piping between the evaporator, the compressor, accompanying vessels and auxiliary equipment. A properl y designed and installed refrigerant piping system should: • Provide adequate refrigerant flow to the evaporators, using practical refrigerant line sizes that limit pressure drop • Avoid trapping excessive oil so that the compressor has enough oil to operate properly at all times • Avoid liquid refrigerant slugging • Be clean and dry Armacell recommends that you coat their exterior insulation with 2 coats of WB Finish and re-coat every 2-4 years. Be sure to use inserts, saddles and shields where appropriate. Missing or inadequate refrigerant piping insulation means a system that operates at a lower efficiency and it risks condensate drips into problem areas such as wall or ceiling cavities - … This 248˚F may be a manual reset, high-temperature safety limit on the high-pressure vapor (hot gas) line to protect the compressor or may be some other requirement from the manufacturer. See Chapters 23, 25, 26, and 27 in the 2017 ASHRAE Handbook--Fundamentals for information about insulation … Tundra Polyethylene pipe insulation is a flexible and closed cell structure that allows it to function as an efficent insultion. Whether you’re an owner or manager of a building or the installing contractor, you need to know how to protect yourself from litigation and costly mistakes due to the improper application of the code covering your project. GREENGUARD Gold Certified. For more details, please read our. Piping and fittings for refrigerant vapor (suction) lines shall be insulated with insulation having a thermal resistivity of at least R-3 and having external surface permeance not exceeding 0.05 perm [2.87 ng/ (s • m 2 • Pa)] when tested in accordance with ASTM E 96. With the constant changing energy requirements that are being pushed to meet energy goals established by legislation or local authorities, and the updating of codes every three years, there is a need to remain vigilant. Make sure to use expansion loops where required. The insulation will start to crack and come apart at the joints and seams. This chapter is a guide to specifying insulation systems for refrigeration piping, fittings, and vessels operated at temperatures ranging from 35 to -100°F (2 to -70°C). In almost every scenario involving a heating pipe, replacing 1/2" thickness pipe insulation with 1" thickness pipe insulation reduces the loss of heat transmission in half. What can we do to improve the information ? 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