Unitary products group G9T-DH Manuale di Installazione

035-19599-001 Rev. A (1103)EFFICIENCYRATINGCERTIFIEDThis product was manufacturedin a plant whose quality systemis certified/registered as beingin con

035-19599-001 Rev. A (1103)10 Unitary Products GroupSECTION V: ELECTRICAL POWERAnnual Fuel Utilization Efficiency (AFUE) numbers are determined in acc

035-19599-001 Rev. A (1103)Unitary Products Group 11IMPORTANT: Some electronic thermostats do not have adjustable heatanticipators. They may have othe

035-19599-001 Rev. A (1103)12 Unitary Products GroupSingle-Wire Twinning InstructionsConnect the control wiring as shown in the diagram below. 1. Conn

035-19599-001 Rev. A (1103)Unitary Products Group 13COMBUSTION AIR/VENT PIPE SIZINGSelect the correct size from Table 9. The size will be determined b

035-19599-001 Rev. A (1103)14 Unitary Products Group7. All joints must provide a permanent airtight and watertight seal.8. Support the combustion air

035-19599-001 Rev. A (1103)Unitary Products Group 15VENT SYSTEMThis furnace is certified to be installed with one of two possible ventconfigurations.1

035-19599-001 Rev. A (1103)16 Unitary Products GroupVERTICAL VENT APPLICATIONS AND TERMINATIONRoof mounted vertical terminals may be field fabricated.

035-19599-001 Rev. A (1103)Unitary Products Group 17The combustion air intake pipe should be located either through thewall (horizontal or side vent)

035-19599-001 Rev. A (1103)18 Unitary Products GroupVent and Supply (Outside) Air Safety Check ProcedureFollow the procedure in ANSI Z223.1 National F

035-19599-001 Rev. A (1103)Unitary Products Group 19Specially Engineered InstallationsThe above requirements shall be permitted to be waived where spe

035-19599-001 Rev. A (1103)2 Unitary Products GroupSPECIFIC SAFETY RULES AND PRECAUTIONS1. Only Natural gas or Propane (LP) gas are approved for use w

035-19599-001 Rev. A (1103)20 Unitary Products GroupDrain Connection - The following steps apply to all models. For hori-zontal application, also foll

035-19599-001 Rev. A (1103)Unitary Products Group 21TOOLS AND INFORMATION THAT WILL BE REQUIRED IN ORDER TO PROPERLY PERFORM THE FURNACE STARTUP PROCE

035-19599-001 Rev. A (1103)22 Unitary Products GroupIn the USA use the following formula to calculate the furnaceinput.For natural gas multiply the he

035-19599-001 Rev. A (1103)Unitary Products Group 23DO NOT ADJUST the manifold pressure regulator if the actual input isequal to or within 8% less tha

035-19599-001 Rev. A (1103)24 Unitary Products GroupADJUSTMENT OF TEMPERATURE RISEThe temperature rise, or temperature difference between the return a

035-19599-001 Rev. A (1103)Unitary Products Group 25NOTES:1. Airflow expressed in standard cubic feet per minute (CFM) and in cubic meters per minute

035-19599-001 Rev. A (1103)26 Unitary Products GroupAPPLYING FILTER PRESSURE DROP TO DETERMINE SYSTEM AIRFLOWTo determine the approximate airflow of t

035-19599-001 Rev. A (1103)Unitary Products Group 27SECTION XI: WIRING DIAGRAM FIGURE 33: Wiring Diagram

Subject to change without notice. Printed in U.S.A. 035-19599-001 Rev. A (1103)Copyright © by York International Corp. 2003. All rights reserved. Supe

035-19599-001 Rev. A (1103)Unitary Products Group 3INSPECTIONAs soon as a unit is received, it should be inspected for possible dam-age during transit

035-19599-001 Rev. A (1103)4 Unitary Products GroupSECTION II: DUCTWORKDUCTWORK GENERAL INFORMATIONThe duct system’s design and installation must:1. H

035-19599-001 Rev. A (1103)Unitary Products Group 51. The Air Temperature Rise is determined by subtracting the ReturnAir Temperature Reading from the

035-19599-001 Rev. A (1103)6 Unitary Products GroupHorizontal Installations Without a Cooling Coil CabinetWhen installing this appliance, the furnace

035-19599-001 Rev. A (1103)Unitary Products Group 7Downflow FiltersA top return filter rack is supplied with the furnace. Two standard filtersare supp

035-19599-001 Rev. A (1103)8 Unitary Products GroupATTIC INSTALLATIONThis appliance is design certified for line contact when the furnace isinstalled

035-19599-001 Rev. A (1103)Unitary Products Group 9GAS PIPING INSTALLATIONProperly sized wrought iron, approved flexible or steel pipe must beused whe