Page 3 - Operating Instructions:; FURNACE USER MAINTENANCE
271015-UUM-A-0407 Unitary Products Group 3 HOW YOUR GAS FURNACE WORKS Your furnace is a very easy appliance to take for granted. Season afterseason, it sits there in your home, keeping you warm and comfortable.For this reason, you may never have given much thought to the wayyour furnace operates. In...
Page 4 - Unitary Products Group; Air Filters; Externally Mounted Air Filters; Blower Care; SECTION II: SERVICE AND MAINTENANCE; SAFETY SECTION
271015-UUM-A-0407 4 Unitary Products Group Every time the filters are changed the following items should be visuallyinspected: • Check vent pipe for blockage or leakage. • Check all components to be sure they are in good condition andthat there are no obvious signs of deterioration. • Check for dirt...
Page 5 - Burner Removal/Cleaning; Lower Heat Exchanger Access; SEQUENCE OF OPERATION
271015-UUM-A-0407 Unitary Products Group 5 FURNACE CLEANING SECTION NOTE: The cleaning operations listed below must be performed only by a qualified service agency. Burner Removal/Cleaning The main burners should be checked periodically for dirt accumulation.If cleaning is required, follow this proc...
Page 6 - Pin Position A; ADJUSTMENT OF FAN CONTROL SETTINGS; Heating Indoor Fan Off Delay
271015-UUM-A-0407 6 Unitary Products Group 5. 1st and 2nd Stage called simultaneously• The 1st stage call is processed as described in paragraph 1 above. • Once Flame Rectification is established, 2nd Stage is entered immediately as described in paragraph 2 above. 6. 1st and 2nd Stage satisfied simu...
Page 7 - Continuous Blower Operation; Tap A; Humidistat; TROUBLESHOOTING
271015-UUM-A-0407 Unitary Products Group 7 Continuous Blower Operation The blower will run continuously whenever the wall thermostat fanswitch is in the "ON" position. The furnace blower will run at the speedselected on the "FAN SPEED" jumpers on the main control board (HICOOL, LO CO...
Page 8 - This feature should only be used by a qualified service tech-
271015-UUM-A-0407 8 Unitary Products Group 4 RED FLASHES: This indicates that a primary or auxiliary limit switch has opened its normally closed contacts. With this fault code the controlwill operate the supply air blower and inducer. This condition may becaused by: dirty filter, improperly sized du...
Page 10 - SECTION III: REPLACEMENT PARTS LIST
271015-UUM-A-0407 10 Unitary Products Group SECTION III: REPLACEMENT PARTS LIST 1 27 6,21 11 2 5 45 46 31 17 22 10 9 8 42 24 38 4 7 12,36 23 20 30 39 16 48 49,50 14 29 51 26 11 13 12 20 36 25 37 7
Page 12 - DESCRIPTION; REPLACEMENT PART CONTACT INFORMATION; York International
271015-UUM-A-0407 12 Unitary Products Group TABLE 2: Field Installed Accessories - Non Electrical MODEL NO. DESCRIPTION USED WITH 1NP0347 PROPANE (LP) CONVERSION KIT ALL MODELS 1PS0313 HIGH ALTITUDE PRESSURE SWITCH KIT* (Does Not Include Orifices) 57, 80, 100 MBH 1PS0314 120 MBH 1CB0314 COMBUSTIBLE ...
Page 13 - SECTION IV: WIRING DIAGRAM
271015-UUM-A-0407 Unitary Products Group 13 SECTION IV: WIRING DIAGRAM FIGURE 8: Wiring Diagram
Page 14 - NOTES
Page 16 - Limited Warranty
Subject to change without notice. Printed in U.S.A. 271015-UUM-A-0407 Copyright © by York International Corp. 2007. All rights reserved. Supersedes: 167354-UUM-B-0806 Unitary 5005 Norman Products York OK Group Drive 73069 Limited Warranty UPG warrants this product to be free from defects in factory ...