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. . . . ~ . . . . / '�111!11ANDATORY REQUKREMENTS ~ xed � ��11 �� uthan the calculatedtotal load but not more than 1.10 times greater than the total load calculated according to the procedure selected in Section 400.r.or the closest available provided by the manufacturer's product lines.The corresponding latent capacity o/the equipment shall not he less than the calculated latent load. The published value for AHR|total capacity is a nominal, shall not hm used for equipmentaidno.Manufacturers expanded performance data shall be used to select cooling-only equipment.this selection shall be based on the outdoor design dry-bulb temperature for the load calculation(or entering water temperature for water-source equipment),the blower CFM provided by the expanded performance data,the design value for entering wet-buib temperature and the design value for entering dry-bulb temperature. ` Design values for entering wet-bulb and dry-bulb temperatures shall be for the indoor dry bulb and relative humidity used for the load calculation and shall be adjusted for return side gains if the return duct(s)is installed in an unconditioned space. Exceptions: 1. Attached single-and multiple-family residential equipment sizing may be selected so thatits cooling capacity is less than the calculated total sensible load but not less than oO percent of that load. e. When signed and seated by a Florida-registered engineer,in attached single-and multiple-family units,the capacity of equipment may bo sized in accordance with good design practice. n«oo.c1:z Heating equipment capacity. �l B403.7.1.2.1 Heat pumps. Heat pump sizing shall be based on the cooling requirements as calculated according to Section n4037.1.1.and the heat pump total cooling capacity shall not bo more than 1.1n times greater than the design cooling load even n the design heating load inI A5 times greater than the design cooling load. F� R40nz1�u Electric resistance furnaces. Electric resistance furnaces shall besized within 4xW of the design requirements calculated according m the procedure selected in Section R4o3I1. ' n4ou.7.1.2.3 Fossil fuel heating equipment. The capacity of fossil fuel heating equipment with natural draft atmospheric burners shall not be less than the design load calculated in accordance with Section R403.7.1 �l R4on.�1.3sx�scapuo�'mquio fo r Res idences qungexcess cooling m �h �ngeqv�nsuoopac�yonen �� intermittent basis,such as anticipated additional loads caused by major entertainment events,shall have equipment sized or controlled to prevent continuous space cooling or heating within that space by one or more of the following options: I. A separate cooling n,heating system iautilized to provide cooling o,heating m the major entertainment areas. o. A variable capacity system sized for optimum performance during base load periods ioutilized. ' �l R4Vu.a Systems serving multiple dwelling units(Mondato,y). Systems serving multiple dwelling units shall comply with Sections C403 and C404 of the|ECC--Commn,uia|Provisions in lieu of Section n408. �l noV3.9 Snow melt and ice system controls VmondamqA Snow-and ice-melting systems,supplied through energy service m the bwiWiog. u shall include �m the system,� the � mm�io��~F�o" precipitation is falling and an automatic or manual control that will allow shutoff when the outdoor temperature is above 400F(4.8*0)� � R�m��m��mr��e��m��' ��y��m��a�|m� �� shall bein accordance with Sections R403.1n.1 thmughn4no.`0.5. �l n*03:0.1Hwamm' The electric power to heaters shall be controlled by a readily accessible on-off switch that is an integral part of the heater mounted on the exterior of the heater,or external to and within 3 feet(914 mm)of theheater. of such switch shall not change the setting of the heater thermostat.Such switches shall be in addition to a circuit breaker for the power w the heater.Gas-fired heaters shall not be equipped with continuously burning ignition pilots. n4ox.10.0 Time switches. Time switches or other control methods that can automatically turn off and on according to a preset schedule shall be installed for heaters and pump motors.Heaters and pump motors that have built-in time switches shall be in compliance with this oomiuo. Exnepbuns- 1. Where public health standards require m*huur pump operation. u. Pumps that operate solar-and waste-heat-recovery pool heating systems. 3. Where pumps are powered exclusively from on-site renewable generation. n403�Vonovam' � ' � heated O000rm�mmingpuo� mm vapor-retardant �aovvn,onn,af Fl the water surface maliquid cover or other means proven m reduce heat loss. Exception: Where more than 70 percent of the energy for heating,computed over an operation season,is from site-recovered energy,such as from a heat pump or solar energy source,covers or other vapor-retardant means shall not be required. n^un`1O.4 Gas-and oil-fired pool and spa heaters. All gas-and oil-fired pool and spa heaters shall have a minimum thermal Fl efficiency ovua percent for heaters manufactured on or after April 16,2013,when tested in accordance with ANSI Z 21.56.Pool heaters fired by natural or LP gas shall not have continuously burning pilot lights.