Testing and Samples

Testing and Samples—The QCN member, or material manufacturer, shall, if required, furnish satisfactory evidence as to the kind, quality, and performance of materials used. Upon TVA request, test data from an independent laboratory and material samples shall be provided. • General Requirements—TVA reserves the right to waive portions of these standards if, after review of individual circumstances, a heat pump installation can otherwise meet the standards and intent of the program. − The requirements listed under “Qualifying Homes” at the beginning of this section must be met as part of an approved heat pump installation. General standards apply unless a heat pump type is specifically exempted. Additional standards for specific types are also listed. − The term "heat pump" shall mean any heat pump consisting of one or more factory assemblies that normally include an indoor coil, compressor(s), outdoor coil (or a refrigerant-to-water heat exchanger if water source or refrigerant-to-ground if direct exchange), and air moving means, including means to provide heating and cooling. An assembly, or matched assemblies designed for use together, shall be matched and certified per the following standards:

Package-Type Dual-Fuel Heat Pumps.

Package-Type Dual-Fuel Heat Pumps. This section is related to the installation of all package-type dual-fuel heat pump systems (single-package units that incorporate both a standard electric heat pump and a fossil-fuel furnace). The package-type dual-fuel heat pump shall meet or exceed the minimum HSPF and SEER requirements of package heat pumps as stated under Equipment Requirements subsection, item 1.
Manufactured Home Heat Pump Systems. This section is related to the installation of heat pump systems installed in manufactured homes built to the Department of Housing and Urban Development's Federal Manufactured Home Construction and Safety Standards, 1976. (Manufactured homes built prior to 1976 are not eligible to participate in the energy right Heat Pump Plan except when evidence through analysis indicates the manufactured home can achieve acceptable comfort levels following a heat pump installation with newly installed program ductwork.) 1. Heat pumps installed in manufactured homes may use the existing ductwork or new, field-installed ductwork. For existing manufactured homes manufactured ductwork, only items 9, 10, 14, and 15 of the Duct System Design, Modification, and Installation section shall apply. However, the average face velocity of each supply register shall not exceed 700 feet per minute or be less than 400 feet per minute. All field-installed supply and/or return ductwork shall be in accordance with the equivalent Installation and Duct System Design, Modification, and Installation sections. All other sections in these Installation Standards are applicable unless otherwise noted. 2. All heat pumps installed in manufactured homes shall operate within manufacturer's specifications and be approved for that use by the heat pump equipment manufacturer. The duct system shall provide the amount of air flow across the indoor coil as listed in the heat pump manufacturer's specifications. The installing QCN member is responsible for obtaining the required air flo

Doorbell Transformers

Doorbell Transformers—Insulation may contact the sides of but shall not cover doorbell transformers. • Masonry Chimneys—All insulation and blocking materials shall be kept a minimum of 3 inches away from masonry chimneys. When loose-fill insulation material is used for ceiling insulation, acceptable blocking materials shall be used to ensure a minimum 3-inch clearance. Unfaced mineral fiber batts may provide the minimum clearance by serving as blocking for loose-fill insulation, or other types of blocking may be used to ensure the minimum clearance. The gap (crack) between the interior ceiling finish material and the masonry chimney should be firestopped and sealed in accordance with locally adopted codes and regulations.  • Factory-Built (Metal) Chimneys—All insulation and blocking materials shall be kept a minimum of 3 inches away from factory-built chimneys. The minimum 3-inch clearance shall be provided by utilizing acceptable blocking materials. In some installations where loose-fill insulation is installed as ceiling insulation, the sides of the chimney support box may serve as the blocking material if it provides the minimum 3-inch clearance. Insulation shall not be installed in or over the chimney support box. • Vent Pipes from Gas or Oil-fired Furnaces, Water Heaters, etc—Insulation materials shall be installed no closer than 3 inches to a vent pipe, or the clearance specified on the vent pipe label, from a gas or oil-fired furnace, water heater, etc., where the vent pipe passes through the ceiling. When loose-fill materials are installed as ceiling insulation, acceptable blocking materials shall be used to provide the required clearance and to prevent the insulation material from falling into the cavity around the vent pipe. • Venting—Range hoods and bathroom exhaust fans shall be vented to the outside in conjunction with adding attic insulation. The vent pipes shall not be vented through an existing attic ventilator unless the minimum required net free area for the attic would still exist without the use of that ventilator. If a bathroom or kitchen is not properly vented to the outside, one of the following venting methods must be used:

Preparation

Preparation—The prime window shall be made as weathertight as possible both inside and out (excluding required weepage systems) before a storm window is installed. This includes but is not limited to any weatherstripping, caulking, replacing of broken glass, or other work required to make the prime window weathertight. If a prime window requires caulking, the caulk should be applied in such a manner as to avoid interfering with the mounting surface where the storm window or subframe will be installed and shall comply with these standards. If the prime window requires weatherstripping, the weather strip material should be applied in accordance with these standards. Weepholes (approximately 1/8-inch diameter or equivalent) or an effective weepage system should be provided near the corners along the prime window sill when internally applied storm windows are installed.  • Building Codes—It shall be the QCN member’s responsibility to comply with local building codes concerning any restrictions on the installation of interior applied, thermoplastic storm windows. • Pre-Installation Requirements—The installer shall verify that the storm window assembly is not damaged before installation.   The installer shall refer to the manufacturer’s instructions concerning construction, assembly, and installation of the storm window assembly.   Interior applied, thermoplastic storm windows shall be sized to cover the entire window opening over which they will be installed.   Any operating or hinged glazed insert panels of a storm window assembly shall be in the same position as the operating sash of the prime window.   Any meeting rails or meeting stiles of the storm window assembly shall be aligned with the respective meeting rails or meeting stiles of the prime window.  • Storm Window Assembly—Interior applied, thermoplastic window assemblies shall adhere to the following requirements:

Determine

Determine cooling capacity by using the following formula: Btuh = (h2 - h1) x 4.5 x CFM  h1 =  heat content of air from Table A-1 corresponding to supply air  wet bulb temperature.* h2 =  heat content of air from Table A-1 corresponding to return air wet bulb temperature.* 4.5 =  air properties constant CFM =  Cubic feet per minute air calculated, from funnel, temperature rise, or return air method  *   At supply air outlet and inlet indoors record wet bulb and dry bulb temperatures.  (From Enthalpy Table, record heat content values that correspond to supply and return air wet bulb temperatures, h1 and h2, respectively)
b) Verify that system capacity is + 10% of the equipment manufacturer's rating at the test conditions.
Procedures for notifying Customer and QCN member of Failed Inspections When a program-required inspection of an installation is made and the installation is not in compliance with program standards, the inspector will indicate on the Heat Pump Installation Inspection Checklist (TVA 6254T) and on the Work Completion Form (where applicable) the reasons(s) for the failure to pass the inspection.  The QCN member may be allowed to correct minor deficiencies while the inspector is on-site.  Customer and QCN members must receive a copy of Heat Pump Installation Inspection Checklist. All deficiencies must be corrected and be in compliance within 10 business days.  Following corrections by the QCN member, the inspector shall be notified, after which a reinspection shall be scheduled and performed.  If, during the reinspection, other items not previously identified are shown to be in violation of the installation standards, the QCN member shall have 10 additional business days to correct the deficiencies, after which the third and final reinspection shall occur.

Installation Standards

Installation Standards Standards for installation of heat pumps are divided into groupings to make finding specific information easier. Below is a list of paragraphs applicable to all heat pump installations, unless stated otherwise for specific heat pumps: • General Information • Heat Pump Equipment and Installation Standards • Quality Contractor Network Member • Equipment Requirements • Equipment Installation • Duct System Design, Modification, and Installation • Duct System Insulation • Refrigerant Piping Installation • Refrigerant Piping Insulation • Condensate Piping • Air Filters • Noise Abatement and Vibration Elimination • Electrical Requirements • Indoor Thermostat • Auxiliary Electric Heaters • Outdoor Thermostat (Power Distributor Option) • Extended Warranty Programs • Performance Guarantee

Special installation

. 10 Special installation For greater lengths, the installation must be made with a project previously approved by our technical service. Modifications to any of the following may be required for such a project: - Tube dimensions. - Refrigerant charge. - Suction traps. - Suction accumulator. - Liquid solenoid valve. In such cases, the maximum lengths which can be recommended are: Compact installation of the units The units are supplied prepared for cooling and electrical connections. To install the heat pumps as a compact unit, the outdoor BCVO and indoor BCVI units must be joined by using the holes in each unit and the screws supplied in a bag in the electrical box in the case of BCVO/I-60 and inside the indoor units of BCVI-20/25, 30/40 & 45. The BCVO and BCVI units are supplied with the refrigerant circuit connections ready for welding, and to be interconnected on the outside of the casing. The BCVO/I-20, 25, 30 and 40 have only one circuit. The BCV-45, 60 and 80 units have two circuits. The refrigerant load should be carried out at the jobsite. Charge procedure 1.- De-pressurise the units. 2.- Drain the refrigerant. 3.- Clean out with dry nitrogen. 4.- Solder the tubes, with a dry nitrogen flow inside the tubes. 5.- Use low melting-point rods with a minimum silver content of 5% for soldering. 6.- Fill with 2 kg R-22 refrigerant to detect leaks. 7.- Empty out the refrigerant. 8.- Clean out with dry nitrogen. 9.- Create a vacuum down to 200 microns. 10.- Put in the refrigerant, using scales or a calibrated cylinder. The charge accuracy should be of 30 grams. The outdoor unit is fitted with pressure and temperature points on the connection outlets, for checking of over-heating and sub-cooling. Check that these values are around