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USER’S INFORMATION,
EFFICIENCY
RATING
CERTIFIED
MAINTENANCE AND
SERVICE MANUAL
HIGH EFFICIENCY
ISO 9001
Certified Quality
TUBULAR HEAT EXCHANGER SERIES
Management System
MODELS: PV8*DH/FL8V*DH/FC8V*DH/LL8V*DH/LC8V*DH
(Variable Speed Downflow/Horizontal/Low NOx)
TABLE OF CONTENTS
CONTACT INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 FURNACE CLEANING SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Burner Removal/Cleaning . . . . . . . . . . . . . . .
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271015-UUM-A-0407 INSTRUCTIONS FOR EXAMINING THE FURNACE VENT PIPE INSTALLATION FLUE COLLAR It is the owner’s responsibility to ensure that an annual inspection of the ELECTRICAL entire heating portion of the unit is made by a qualified service agency. JUNCTION BOX CONTROL Examine the furnace as outlined below in steps “1 - 6” before each BOARD heating season. Use Figure 3 for visual reference. 1. Examine the heat exchanger, vent pipe, combustion air passages, SAFETY SHUTOFF vent connectors and
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271015-UUM-A-0407 HOW YOUR GAS FURNACE WORKS To Turn Off the Appliance: 1. Set the thermostat to lowest setting. Your furnace is a very easy appliance to take for granted. Season after season, it sits there in your home, keeping you warm and comfortable. 2. Turn off all electric power to the appliance if service is to be per- For this reason, you may never have given much thought to the way formed. your furnace operates. In order to get the safest and most efficient oper- 3. Remove burner access
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271015-UUM-A-0407 Every time the filters are changed the following items should be visually How to Clean your Filter inspected: High-velocity filters may be cleaned with a vacuum cleaner or washed • Check vent pipe for blockage or leakage. with a garden hose. Be sure to shake off excess water and allow filter to • Check all components to be sure they are in good condition and completely dry before re-installing the filter. that there are no obvious signs of deterioration. Blower Care • Check for
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271015-UUM-A-0407 FURNACE CLEANING SECTION 7. Clean - Replace all components in reverse order. Re-gasket all surfaces which required a gasket. Reconnect all wiring. Reattach NOTE: The cleaning operations listed below must be performed only by vent pipe and gas supply lines before restoring service to furnace. a qualified service agency. Restore electrical power, check gas supply piping for leaks, and Burner Removal/Cleaning then verify furnace operation. The main burners should be checked period
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271015-UUM-A-0407 5. 1st and 2nd Stage called simultaneously The blower CFM for heating can be modified by changing the jumper pin position on the taps selection marked HEAT. The taps selection pins • The 1st stage call is processed as described in paragraph 1 above. have been preset at the factory to provide the maximum CFM. “Air Flow Data” table in the installation manual list the recommended jumper pin • Once Flame Rectification is established, 2nd Stage is entered immediately as described in
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271015-UUM-A-0407 Continuous Blower Operation TROUBLESHOOTING The blower will run continuously whenever the wall thermostat fan The following visual checks should be made before troubleshooting: switch is in the "ON" position. The furnace blower will run at the speed 1. Check to see that the power to the furnace and the ignition control selected on the "FAN SPEED" jumpers on the main control board (HI module is ON. COOL, LO COOL, HI HEAT or LO HEAT). When the jumper is in the 2. The manual shut-
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271015-UUM-A-0407 4 RED FLASHES: This indicates that a primary or auxiliary limit switch 60-MINUTE AUTOMATIC RESET FROM LOCKOUT: This control has opened its normally closed contacts. With this fault code the control includes a “watchdog” type circuit that will reset from a lockout condition will operate the supply air blower and inducer. This condition may be after 60 minutes. Operational faults 6,7,8 will be reset. This provides caused by: dirty filter, improperly sized duct system, incorrect b
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271015-UUM-A-0407 ON W2 SIGNAL OFF ON HIGH INDUCER OFF HIGH STAGE PRESSURE ON SWITCHAND 2ND STAGE OFF MAIN VALVE ON CIRCULATOR HIGH HIGH HEAT SPEED HEAT OFF OFF DELAY 30 SEC. CALL HIGH HEATAFTER LOW HEAT IS ESTABLISHED 2ND STAGE CLOSED HIGH LIMIT OPEN ON W1 SIGNAL OFF LOW ON INDUCER OFF CLOSED LOW STAGE PRESSURE SWITCH OPEN ON HSI OFF ON 1ST STAGE MAIN VALVE OFF PRESENT FLAME SENSE ABSENT ON LOW CIRCULATOR HEAT SPEED OFF HSI INTER- HSI HEAT FAN BURN PURGE WARM DELAY ON WARM TIME 60 SEC. UP 30 SE
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271015-UUM-A-0407 SECTION III: REPLACEMENT PARTS LIST 49,50 48 16 1 46 14 30 31 29 17 45 5 22 51 10 23 9 8 39 42 2 24 26 4 38 11 7 6,21 20 27 12,36 11 13 12 20 25 36 7 37 10 Unitary Products Group
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271015-UUM-A-0407 ITEM DESCRIPTION ITEM DESCRIPTION MISCELLANEOUS MOTOR 32 1 MOTOR/MODULE, ECM (Complete, Programmed) 33 PLUG, OVAL WINDOW 1A ECM MOTOR MODULE (Programmed, less motor) 34 1B MOTOR, BLOWER (Less ECM Module) 35 GROMMET, 1/2” DIA. 2 MOTOR, VENTOR ASS’Y 36 BRACKET, ROLL-OUT SWITCH ELECTRICAL 37 ORIFICE, BURNER (Natural #45) 3 38 PLATE, RESTRICTOR 4 CONTROL, HIGH LIMIT [LS1] 39 COLLAR, FLUE 5 CONTROL, FURNACE [FC] 40 BAFFLE, BLOWER 6 IGNITOR 41 GASKET, RESTRIC
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271015-UUM-A-0407 TABLE 2: Field Installed Accessories - Non Electrical MODEL NO. DESCRIPTION USED WITH 1NP0347 PROPANE (LP) CONVERSION KIT ALL MODELS 1PS0313 57, 80, 100 MBH HIGH ALTITUDE PRESSURE SWITCH KIT* (Does Not Include Orifices) 1PS0314 120 MBH 1CB0314 14-1/2” (”A”) CABINETS 1CB0317 COMBUSTIBLE FLOOR BASE FOR DOWNFLOW UNITS 17-1/2” (“B”) CABINETS 1CB0321 21” (“C”) CABINETS REPLACEMENT PART CONTACT INFORMATION This is a generic parts list. To request a complete parts list, refer to the
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271015-UUM-A-0407 SECTION IV: WIRING DIAGRAM FIGURE 8: Wiring Diagram Unitary Products Group 13
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271015-UUM-A-0407 NOTES 14 Unitary Products Group
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271015-UUM-A-0407 NOTES Unitary Products Group 15
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Limited Warranty UPG warrants this product to be free from defects in factory workmanship and material under normal use and service and will, at its option, repair or replace any parts that prove to have such defects according to the terms outlined on the reverse side of this warranty. This warranty covers only the equipment described by the Product Model Number and Serial Number listed on the Warranty Registration Card. UPG warrants the primary heat exchangers in the product to be free from def
