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2004 Washington State Nonresidential Energy Code <br />1411.1 General: Equipment shall have a minimum performance at Ina <br />specified rating conditions not less than Ina values shown in Table 14-tA <br />through 14-IG. If a nationally recognized candical:on program exist for a <br />product covered in Tahles 14-IA through 14.113, and it Includes provislons <br />for venOcalion and challenge of equipment efficiency ratings, then Iths <br />product Shall be listed in the Codification program. <br />Gas -fired and oil -fired forced air furnaces with Input ratings >_ 225000 <br />Btulh (65 kW) Shall also have en Intermittent ignition or Interrupted device <br />(IID), and have either mechanical draft (Including power vanling) or a rue <br />damper. A vent damper Is an acceptable allernsfive to a flue damper for <br />furnaces where combustion air Is drawn from the conditioned space. All <br />furnaces with Input ratings . 225,000 Blum (65 kW ). including electric <br />fumeces, that are not locoed within the conditioned apace shall have <br />jackal losses not exceeding 0,76% of the input rating. <br />1411.2 Rating Cot, Itlons: Cooling equipment shall be rated at ARI test <br />conditions g,m Prot sdures when available. Where no applicable <br />procedures exist, dole shall be furnished by the equipment manulaclurbr. <br />1411.3 Combinatlon Space and Service Water Hosting: For <br />combination space ale service water healers with a principal function of <br />providing space heat. the Combined Annual Efficiency (CAE) may be <br />calculated by using ASHRAE Standard 124-1991. Storage water heal-S <br />used In combination space heel and water heal applications shall have <br />dither an Energy FAttor (EF) or a CAE of not less than the following: <br />CAE <br />< 50 gal storage <br />_E: <br />0.56 <br />0.71 <br />50 to 70 al store a <br />0.57 <br />Olt <br />> 70 gal storage <br />1 0.55 <br />0.70 <br />1411.4 Packaged Electric Hosting and Cooling Equipment: Packaged <br />electric equipment providing both heating and cooling rvtth a total cooling <br />capacity greater than 20,000 Bluth snail be a heal Pump. <br />Exception: Unstained equipment shsellen or Cabinets used <br />solely for personal wireless service facilities. <br />1412 Controls <br />1412.1 Temperature Controls: Each system shall be provided with at <br />least one temperature control device. Each zone shall be controlled by <br />individual then0oalallc controls responding to temperature within the zone. <br />At a minimum, each near at a building shall be considered as a separate <br />zone. <br />1412.2 Deadband Controls: When used to control both comfort healing <br />and cooling, zone MOMOSMIO controls stall be capable of a deadband of <br />at leasl5 degrees F within which the Supply of heating and cooling energy <br />to the zone Is shut off or reduced to a minimum. <br />Exceptions: <br />1. Special occupancy, special usage, or coda requirements <br />where deadband Controls era not appropriate. <br />2. Buildings complying with Section 1141 4, it in the proposed <br />building energy analysis, treating and cooling thermostat <br />setpoinls are set to the same temperature between 70 <br />degrees F and 75 degrees F Inclusive, and assumed la be <br />Consent through(,ul the year. <br />3 'rhermoshals that require manual changeover between <br />healing and cooling modes. <br />1412.3 Humidity Controls: It a system is equipped with a means for <br />add.rg moisture, a humidtslet shell be provided. <br />1412.4 Setback and Shut -Off: HVAC systems shall be equipped with <br />automatic controls capable of accomplishing a reduction of energy use <br />through control setback of equipment shutdown during period$ of non-use <br />or alternate use of the spaces served by the system. The automatic <br />controls shall have a minimum seven-day clack and be capable of being <br />set for seven different day types per weak_ <br />Exceptions: <br />1. Systems serving areas which require continuous operation at <br />the same temperature selpoinl. <br />2. Equipment with lull load demands of 2 kW (6,626 Bluth) or <br />less may be controlled by readily accessible manual off -hour <br />controls. <br />1412.4.1 Dampers: Outside air Intakes, exhaust outlets and relef Canada <br />serving conditioned spaces shall be equipped with dampers which close <br />automatically when rho System Is off or upon power failure. <br />Exceptions: <br />1. Systems serving areas which require continuous operation. <br />2. Combustion air intakes. <br />3 Gravity(nonmotorized) Compete are acceptable In buildings <br />less man 3 stories In height. <br />4 Gravity (nonmotorized) dampen are acceptable In exhaust <br />and relief outlets in the first Story and levels below the first <br />Story of buildings three or more stores in height. <br />1412.4.2 Optimum Sim It Controls: Heating and cooling systems with <br />design supply air capacities exceeding 10.000 CIm Shall have optimum <br />Stan controls. Optimum Stan controls shall be designed to automatically <br />adjust the Shan limo of an HVAC System each day to bring the space to <br />desired occupied temperature levels immediately before scheduled <br />occupancy. The control algorithm Shan, as a minimum, be a function of the <br />difference between space temperature and occupied setp01n1 and the <br />amount of 1:me prior to scheduled occupancy. <br />1412.E Heat Pump Controls: Unitary air cooled heal Pump$ shail Include <br />microprocessor controls that minimize supplemental heat usage during <br />start-up, set-up, and defrost conditions. These controls shall anticipate <br />need for heal and use compression healing as the first Stage of heal. <br />Controls shall Indicate when supplemental healing Is being used through <br />,duel means (a g., LED Indicators). <br />1412.6 Combustion Healing Equipirr Controls: Combustion healing <br />equipment with a capacity over 225 rug Blum shall have modulating or <br />staged combustion control. <br />Exceptions: <br />1. Boilers. <br />2. Radiant Heals'$. <br />shall have a means for balancing, including but not him teed to. dampers. <br />temperature and pressure lest connections and balancing valves. <br />1413 Air Economizers <br />1413.I Operation: Air economizers shall be of automatically modulating <br />outside and return air dampers to provide too percent of me design supply <br />air as outside air to reduce or eliminate the need for m schanlcal coaling. <br />Water economizers shall be capable of providing the total concurrent <br />cooling load served by the connoted terminal gquipmenl lacking melds <br />economizer, at outside air temperatures of 45 F dry-bulbl40dF wet -bulb <br />and below. For this calculation, all factors Including solar and internal load <br />shell be the same as those used for peak toad calculations, except for the <br />outside lenperatures. <br />Exception Water economizers using af-Coaled heal rejection <br />equipment may use a 35SF dry-bulb outside air temperature for <br />this calculal,ln. This exception is limited to a maximum of 20 tons <br />per building. <br />1413.2 Documentation: Water economizer plane Submitted for approval <br />shall include the folicwing Information: <br />1. Maxlmu T. outside air condNons for which economizer is sized to <br />provide hill Cooling. <br />2. Design cooling load to be provided by economizer at this outside <br />sir conditicn. <br />3. Heal rejection and terminal equipment performance data <br />including model number, flow rate. capacity, entering and leaving <br />temperature In full economizer cooling mode. <br />1413.3 Integrated Operation: Air economizers shell be capable of <br />providing partial cooling even when additional mechanical cooling is <br />required to meal the remainder of the cooling load <br />Exceptions: <br />1. Individual, direct expansion units that have a rated capacity <br />less then 65,000 Stuff and use nonintegrated economizer <br />controu that preclude simultaneous operation of the <br />economizer and mechanical cooling. <br />2- Water-cooled water Chillers with waterside economizer. <br />1413.4 Humidification: If an air economizer is required on a cooling <br />system for which humidification equipment is to be provided to maintain <br />minimum indoor humidity levels, then the humidifier Shall be of the <br />adiabatic type (direct evaporative media or fog atomization type). <br />Exceptions: <br />1. Health Care facilities where WAC 246-320.525 allows only <br />Gleam Injection humidifiers in ductwork downstream of final <br />filters. 1412.6 Combustion Heating Equipment Controls: <br />Combustion healing equipment eilh a capacity over 225.000 <br />Blum shall have modulating or staged combustion Control. <br />2. Systems with water economizer <br />3. 100% outside air systems with no provisions for air <br />recirculation to the central supply fan. <br />4. Nonadlabatic humidifiers cumulatively serving no more then <br />10% of a building's ass economizer capacity as measured in <br />cfm. This refers to the system cfm serving room$ with stand <br />alone or duct mounted humidifiers. <br />1414 Ducting Systems <br />1414.1 Sealing: Duct work which Is designed to operate at pressures <br />above 12 Inch water column static pressure shall be sealed in accordance <br />with Standard RS-06. Extent of Sealing required Is SS follows: <br />1. Static pressure. 112 inch 102 aches; seal transverse joints. <br />2. Static pressure: 2 inches to 3 inches; seal all transverse joints <br />and longitudinal seams. <br />3. Static pressure: above 3Inches. $eal all transverse joints. <br />longitudinal seams and duct wall penetrations. <br />Duct tape and other pressure sensitive tape snail not be used as the <br />primary sealant where duce are designed to operate at static pressures of <br />1 Inch W.C. or greater. <br />f414.2Insulation: Duds and plenums mat are constructed and function <br />as pad of the building envelope, by separating Interior space from exterior <br />space, shall meet all applicable requirements of Chapter 13. These <br />requirements Include Insulation installation. moisture control, air leakage, <br />and building envelope Insulation levels. Unhealed equipment rooms with <br />Combustion air louvers must be Isolated from rho conditioned space by <br />Insulating interior surfaces to a minimum of R41 and any exterior <br />envelope surfaces per Chapter 13. Outside air ducts serving individual <br />supply air unite with less than 2.800 cfm of total supply air capacity shall be <br />insulated to a minimum of R-7 and are not considered building envelope. <br />Other outside air duct runs are considered building envelope until may, <br />1. contract to me healing or cooling equipment, or <br />2. era Isolated from the exterior with an automatic shut-off damper <br />complying with Section 1412.1.1. <br />Once outside air ducts most the above listed requirements, tiny runs <br />within conditioned space shall comply with Table 14.5 requirement. <br />Other ducts and plenums shall be thermally Insulated per Table 14.5. <br />Exceptions: <br />1. W.Ihin the HVAC equipment. <br />2. Exhaust air ducts not subject to condensation. <br />3. Exposed ductwork within a zone that Serves that zone. <br />1415 Piping SySUm• <br />1415.1 Insulation: Piping Shall be thermally insulated in accordance with <br />Table 14.6. <br />Exception: Piping installed within unitary HVAC equipment. <br />Water pipes outside the conditioned space she!! be insulated in <br />eccordenca with Washington Stale Plumbing Cade (WAC 51-20) <br />1416 Completion Requirements (Referro All Section 1416 Shoots <br />Building Commissioning Guidelines, published by the Budi lg <br />Commissioning Association. for consists(# text and guidelines lot building <br />completion and commlssiohing requirement.) <br />Q'v, <br />