Carrier PG8JEA Installation, Start-up, Operating And Service And Maintenance Instructions

7All fuel--burning equipment must be supplied with air for fuelcombustion. Sufficient air must be provided to avoid negativepressure in the equipment room or space. A positive seal must bemade between the furnace cabinet and the return--air duct toprevent pulling air from the burner area and from draft safeguardopening.18-IN. (457.2 mm)MINIMUM TO BURNERSA93044Fig. 5 -- Installation in a GarageFIRE HAZARDFailure to follow this warning could result in personalinjury, death, and/or property damage.When the furnace is installed in a residential garage, theburners and ignition sources must be located at least 18inches above the floor. The furnace must be located orprotected to avoid damage by vehicles. When the furnace isinstalled in a public garage, airplane hangar, or otherbuilding having a hazardous atmosphere, the furnace mustbe installed in accordance with the NFGC.! WARNINGPERSONAL INJURY AND/OR PROPERTYDAMAGE HAZARDImproper use or installation of this furnace may causepremature furnace component failure.This gas furnace may be used for heating buildings underconstruction provided that:--The furnace is permanently installed with all electricalwiring, piping, venting and ducting installed according tothese installation instructions. A return air duct is provided,sealed to the furnace casing, and terminated outside thespace containing the furnace. This prevents a negativepressure condition as created by the circulating air blower,causing a flame rollout and/or drawing combustionproducts into the structure.--The furnace is controlled by a thermostat. It may not be“hot wired” to provide heat continuously to the structurewithout thermostatic control.--Clean outside air is provided for combustion. This is tominimize the corrosive effects of adhesives, sealers andother construction materials. It also prevents theentrainment of drywall dust into combustion air, which cancause fouling and plugging of furnace components.--The temperature of the return air to the furnace ismaintained between 55_F (13_C) and 80_F (27_C), withno evening setback or shutdown. The use of the furnacewhile the structure is under construction is deemed to beintermittent operation per our installation instructions.--The air temperature rise is within the rated rise range onthe furnace rating plate, and the gas input rate has been setto the nameplate value.--The filters used to clean the circulating air during theconstruction process must be either changed or thoroughlycleaned prior to occupancy.--The furnace, ductwork and filters are cleaned as necessaryto remove drywall dust and construction debris from allHVAC system components after construction is completed.--Verify proper furnace operating conditions includingignition, gas input rate, air temperature rise, and ventingaccording to these installation instructions.CAUTION!Table 2 – Minimum Free Area Required for Each Combustion Air Opening or Duct to OutdoorsFURNACEINPUT(BTUH)TWO HORIZONTAL DUCTS(1 SQ. IN./2,000 BTUH)(1,100 SQ. MM/KW)SINGLE DUCT OR OPENING(1 SQ. IN./3,000 BTUH)(734 SQ. MM/KW)TWO OPENINGS OR VERTICALDUCTS(1 SQ. IN./4,000 BTUH)(550 SQ. MM/KW)Free Area of Open-ing and Duct(sq. in. / sq. mm)Round DuctDiameter(in./mm)Free Area of Open-ing and Duct(sq. In. / sq. mm)Round DuctDiameter(in. / mm)Free Area ofOpening and Duct(sq. In. / sq. mm)Round DuctDiameter(In./mm)44,000 22 (14193) 6 (152) 14.7 (9484) 5 (127) 11 (7097) 4 (102)66,000 33 (21290) 7 (178) 22 (14193) 6 (152) 16.5 (10645) 5 (127)88,000 44 (28387) 8 (203) 29.3 (18903) 7 (178) 22 (14193) 6 (152)110,000 55 (35484) 9 (229) 36.7 (23677) 7 (178) 27.5 (17742) 6 (152)132,000 66 (42581) 10 (254) 44 (28387) 8 (203) 33 (21290) 7 (178)EXAMPLES: Determining Free AreaFURNACE WATER HEATER TOTAL INPUT110,000 + 30,000 = (140,000 divided by 4,000) = 35.0 Sq. In. for each two Vertical Ducts or Openings66,000 + 40,000 = (106,000 divided by 3,000) = 35.3 Sq. In. for a Single Duct or Opening88,000 + 30,000 = (118,000 divided by 2,000) = 59.0 Sq. In. for each of two Horizontal DuctsPG8MEA