Kees IFG (INDIRECT FIRED GAS) MAKE-UP AIR UNITS - Duct Manuale Utente

INSTALLATION AND SERVICE MANUALOUTDOOR ROOFTOP GAS-FIRED DUCT FURNACE(NATURAL OR POWER VENTED)(S) RISM-9J30-05380AATTENTION: READ THIS MANUAL AND ALL

– 10 –The appliance must be isolated from the gas supplypiping system by closing its individual manual shutoffvalve during any pressure testing of the

– 11 –GAS CONNECTIONS (continued)For the most satisfactory piping installation, the followingprocedure should be followed. Make piping layout of thewh

– 12 –NominalIronPipe SizeInternalDia.Maximum Capacity of Pipe in Cubic Feet of Gas per Hour for Gas Pressures of 0.5 psig (3.5 kPa) or Less,and a Pre

– 13 –OPERATIONGENERALAll units are equipped with intermittent pilot ignitionsystems. This system is 100% pilot burner shut off. SeeFigure 11 for burn

– 14 –OPERATION continuedChart 4 - Gas Supply PressureNatural Gas Propane GasHeating Value 1075 Btu/Ft32500 Btu/Ft3(40.1 MJ/m3) (93.1 MJ/m3)Manifold P

– 15 –GAS CONTROLS continuedTWO-STAGE CONTROLOptional two-stage control is provided with a two-stagegas valve capable of firing at 100% and 40% of rat

– 16 –GAS CONTROLS continuedELECTRONIC MODULATING CONTROLUnits with electronic modulating control are providedwith an electronic modulating valve capa

– 17 –AIR DISTRIBUTIONTwo basic air control systems are used to deliverconditioned air to the occupied space: “constant” fanoperation and “intermitten

– 18 –LIGHTING continued2. Turn on electrical power. The unit should now beunder the control of the thermostat.3. Turn the thermostat to the high heat

– 19 –When shipped from the factory, all gas fired units areequipped for the average BTU of the gas stamped onthe rating plate. Since the BTU content

– 2 –TABLE OF CONTENTSRECEIVING/PRE-INSTALLATION INSTRUCTIONS ... 2GENERAL SAFETY INFORMATION ...

– 20 –START-UP (continued)FINAL CHECKOUTRun the unit sequentially through its stages of heating.One proper unit operation is verified, perform these

– 21 –Figure 13 - Natural Vent Duct FuranceFigure 14 - Power Vent Duct Furnace

– 22 –Chart 6 - Trouble ShootingSYMPTOMSA. Gas odor.B. Delayed ignition.C. Pilot will not light, or will not staylit.D. Main burners will not light.PO

– 23 –Chart 6 - Trouble Shooting continuedSYMPTOMSE. Flame lifting from burner ports.F. Flame pops back.G. Noisy flame.H. Yellow tip flame (some yello

– 24 –Chart 6 - Trouble Shooting continuedSYMPTOMSJ. Floating flame.K. Burner won't turn off.L. Rapid burner cycling.M. Not enough heat.POSSIBLE

– 25 –Chart 6 - Trouble Shooting continuedPOSSIBLE CAUSES 1. Thermostat malfunction. 2. Heater runs continuously.a. Improper thermostat or transf

– 26 –SERVICE NOTEDue to the many configurations, options and voltagecharacteristics available on Outdoor Duct Furnaces,the information provided in th

– 27 –Remarks: _______________________________________________________________________________________________________________________________________

http://www.mestek.com260 NORTH ELM ST., WESTFIELD, MA 01085TEL: (413) 564-5540 FAX: (413) 562-5311HVAC PRODUCTS

– 3 –GENERAL SAFETY INFORMATIONvent through a protective grille, and the design of thevent cap is such that the products of combustion aredischarged a

– 4 –Figure 1 - Standard Natural Vented Outdoor Duct FurnaceChart 1 - Dimensional/DataFigure 2 - Standard Power Vented Outdoor Duct FurnaceCAPACITY US

– 5 –F* Nat. L.P.INPUT OUTPUT Temp. Rise Min. Gas Gas Net ShippingCAPACITY RATING RATING EFF. MIN. MAX. F Deg. Static Clearance Inlet Inlet Weigh

– 6 –PERFORMANCE DATA CURVESFigure 3 - High Temperature Rise Duct Furnaces — 30-90 F° (17-50 C°)Figure 4 - Low Temperature Rise Duct Furnaces — 20-60

– 7 –BYPASS SIZING INFORMATION(BUILT ON THE JOB – NOT FURNISHED BYFACTORY)On occassion when a duct furnace is incorporated inan air handling system, i

– 8 –INSTALLATIONFigure 6 - Minimum Clearances to Combustible Material or Obstructions Open all disconnect switches andsecure in that position before

– 9 –D4596Power vented models are designed with combustionair inlet and flue products outlet located in the louveredside access panel. Never locate th