PureFlow ® MANABLOC Manifold Plumbing System ® Installation Manual October, 2007
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CONTENTS 1 Introduction 4.8 Multiple MANABLOC Installations . . . . . . . 13 4.9 ViegaPEX General Design/Installation Practices . . . . . . . . . . . 13 1.1 Viega . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.2 PureFlow System Concepts. . . . . . . . . . . . . 5 5 Mounting the MANABLOC 2 Green Building 5.1 Mounting The MANABLOC Between Studs . . . . . . . . . . . . . . . . . . . . . . 15 5.2 Mounting The MANABLOC Without Use Of MBB2 Straps . . . . . . . . . . 17 5.
1. INTRODUCTION 1.1 Viega For over 100 years, Viega has been a globally trusted name in the plumbing industry. Through innovative techniques, sophisticated technologies, and acquisition of the top PEX plumbing products in the US, Viega has become the industry leader for PEX plumbing. Viega produces a comprehensive range of plumbing and heating equipment. Anywhere water flows in a building Viega manufactures a system to fit.
1.2 PureFlow System Concepts ViegaPEX PureFlow is a high quality flexible PEX system for hot and cold potable water distribution. The PureFlow plumbing system offers maximum security thanks to cold press and full circle crimp fitting techniques. These fittings guarantee shorter installation times for all types of applications, and vastly reduces the required number of fittings.
2. GREEN BUILDING 2.1 General Clean System And Clean Installation Green Building incorporates environmental considerations into every phase of the home building process where multiple factors are considered during construction as well as its operation and its impact on the environment. LEED® (Leadership in Energy and Environmental Design) was established by the U.S. Green Building Council (USGBC) as a system to define and measure "green building".
as well as eliminating interference between fixtures. Often each fixture can be fed with smaller diameter tubing which is easier and faster to install. Design Factors For Installing A Parallel System • Water Heater Placement This should be as close as possible to the MANABLOC to minimize extra water from being stored in the larger hot water supply lines between the MANABLOC and water heater.
located throughout a structure placed near each main fixture group and are supplied by the main hot and cold supply lines similar to the branch and main system. The manifolds essentially branch multiple lines from a common location in lieu of multiple tee fittings spread out. This takes advantage of benefits from both types of systems and helps keep hidden fittings to a minimum.
3. CODE COMPLIANCE 3.1 Plumbing Code Compliance (Parallel Systems) 3.2 Sizing of Parallel Water Distribution Systems (MANABLOC) The MANABLOC parallel water distribution system meets the ASTM F877, standard specification for cross-linked polyethylene (PEX) plastic hot and cold water distribution system utilizing ViegaPEX tubing meeting the requirements of the ASTM F876, standard specification for cross-linked polyethylene tubing.
4. THE MANABLOC 4.1 The MANABLOC The MANABLOC control unit is tested to the requirements of ASTM F877 and certified by NSF International. The MANABLOC supply inlet connections utilize a special 1" MANABLOC gasketed swivel connection that requires MANABLOC transition fittings (not included in the MANABLOC package, must be purchased separately). Transition fittings available include NPT male thread, brass insert (PEX crimp), bronze insert (PEX press), and compression.
Y-Block Cold Port(s) Hot Water Supply Inlet Hot Port(s) Valve Key Cold Water Supply Inlet or Outlet Cold Port(s) Port Valve Cold Water Supply Inlet or Outlet Divider Plate Plastic Mounting Bracket sized according to the fixture demand and the length of the individual line (see the MANABLOC Tube Size Guide for details on sizing a typical system). A MANABLOC with all of the same size ports, can easily have some ports converted to 1/2" with optional PEX Crimp adapter MXLSA33 (3/8" port to 1/2" tube).
3. When installing the MANABLOC in a location other than between studs, provisions must be made to support the tubing runs as they exit the MANABLOC. (See section 5). 4. Any installed cover panel shall allow access to the MANABLOC and its mounting screws, the port valves, distribution line connections and supply line connections. 5. To maximize potential water and energy savings, the MANABLOC should be mounted as close as is practical to the hot water source, taking into consideration the following: a.
Note: these valves are field-repairable. Contact Viega Customer Service for more information on this procedure. 4.7 Domestic Hot Water Circulation Systems ViegaPEX and the MANABLOC can be used in continuously recirculating domestic hot water plumbing loops, provided: 1. The plumbing loops shall operate with water temperatures of 140°F or lower, as required by most model plumbing codes. If a main inlet/outlet will not be used, it must be capped (use Part No. ECAP1).
COLD WEATHER CAUTION! The thermoplastic components of the MANABLOC, like all thermoplastics, have decreased resistance to impact under freezing conditions and could be damaged. Increased care must be exercised when installation is to occur under freezing conditions. BEFORE INSTALLING THE MANABLOC, MAKE SURE THE LOCATION REQUIREMENTS HAVE BEEN MET. Extra caution should be taken in handling the MANABLOC when temperatures are below freezing.
5.1 MOUNTING THE MANABLOC 5.1 Mounting The MANABLOC Between Studs NOTICE! Please leave this installation guide for the homeowners reference. Local code may also require additional labeling directly adjacent to the MANABLOC or on the inside of any cover panel. Dimensions in these instructions are for 16" stud centers, and must be adjusted for other stud spacing.
When the MANABLOC includes a divider plate, also mark the location of the ports directly above and below the divider plate onto both studs. 6. Detach the MANABLOC from its Mounting Straps (or 1 x 4s) and remove it from the installation area to prevent wood chips or other debris from falling into the unit. If the MANABLOC does not have a divider plate, push the nail into the printed center line of the bottom most port (E) and on into the corresponding mark on the stud.
so as not to induce bending stress on the MANABLOC. Necessary elbows, couplings, and tees are allowed in the main water supply lines. 3. ATTACHING THE MANABLOC BETWEEN THE STUDS: 16. Reattach the MANABLOC to the mounting straps. When the MANABLOC is installed prior to wall finishing operations, the unit MUST be protected from paint, texture compounds and drywall dust.
7. When attaching the distribution line tubing to the 2 x 4 supports, be sure to use appropriately-sized Viega tubing clamps (For example, use stock code 52 000 for 3/8" tubing and stock code 52 020 for 1/2" tubing). Use one clamp per tube to ensure that the tubing is held securely. Clamps shall be positioned NO FURTHER than six (6) inches from the end of the port. DO NOT pull tubing tight. Leave at least 7" of slack per 50' of tubing run.
6. INSTALLING DISTRIBUTION LINES 6.1 Installing Distribution Lines Distribution lines should be run continuously in the most direct route from the MANABLOC to the fixtures. A distribution line may contain a coupling or other fitting for purposes such as repairing a damaged section of tubing, handling a change of direction which cannot be made within the minimum bend radius guidelines, accommodating a fixture location change which requires a longer line, or to supply a lowdemand accessory (i.e., ice maker).
6.2.1 Compression Connections (3/8" & 1/2" ports) THE WATER SUPPLY TO THE MANABLOC SHALL BE TURNED OFF WHILE MAKING DISTRIBUTION LINE CONNECTIONS. NOTE: The red caps on the MANABLOC designate hot ports, the blue caps designate cold ports. Make sure the distribution lines are being connected to the correct ports (hot or cold). The use of color coded ViegaPEX tubing also reduces the possibility of cross connections. 1.
2. Check full tubing insertion at view hole of sleeve, then press the sleeve with an appropriately sized press tool. See section 5 from the PureFlow installation manual for pressing instructions. DO NOT PRESS TWICE. 3. Insuring sealing element (A) is in place, insert the fitting into the desired port until the fitting flange sets flush with the end of the port. CAUTION Use only sealing elements supplied with the adapters. 4.
Place the wet sealing element (A)... WATER CLOSET CONNECTIONS (A) RISER CONNECTIONS (B) ...against the brass adapter flange (B). 2. Slide a crimp ring (C) - XLCR2 for 3/8" tubing; XLCR3 for 1/2" - and the supplied swivel nut (D) onto the tubing (threads of the nut toward the end of the tubing). Insert the brass adapter (B) fully into the end of the tubing as shown. Tighten fixture nut hand tight plus an additional 1/4 turn. Check all connections for leaks. 3.
6.4 Water Supply Connections The main water supply shall be turned off before making water supply connections. The MANABLOC water supply connection uses a special 1" swivel MANABLOC transition fitting which seals with a rubber washer. This connection is used on the cold water supply and the hot water supply/return lines. This connection to the MANABLOC does not require any form of thread sealant and none shall be used. DO NOT USE ANY FORM OF THREAD SEALANT TO MAKE THIS CONNECTION.
7. FILLING AND TESTING 1. Upon completion of the installation, the system should be filled and hydrostatically tested. Use only POTABLE water for testing. WATER TESTING SHALL BE AVOIDED DURING FREEZING CONDITIONS. UNDER NO CIRCUMSTANCES SHALL THE SYSTEM BE TESTED AT TEMPERATURES LOWER THAN 10˚F (-12˚C). 2. Open all connected port valves before filling the system with water or air and pressurizing.
by slow expansion. The pressure drop is dependent on ambient temperature, system capacity, and test pressure but shall not be more than 8 psi in an hour. Test shall be conducted when significant changes to temperature are not expected. Please note significant changes in ambient temperature also can affect system pressure. 6. Due to the normal contraction of the MANABLOC in extremely cold weather, the tie rods may appear loose. This is normal. DO NOT tamper with the tie rods, they are factory pre-set.
8. SYSTEM DISINFECTION 8.1 General Local codes may require system disinfection. When no other method is available, follow the time limitations and exposure levels show below 1. Use a chlorine solution and one of the exposure durations listed below: Concentration Period Authority 200 PPM 3 hours IPC/UPC® 50 PPM 24 hours IPC/UPC® 2. Mix the disinfection solution thoroughly before adding it to the system. 3. The chlorine solution must reach all parts of the system.
NOTES 27 Viega IM-PFMB 1007
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