Unitary products group P3HMX20F12001 Manuale di Installazione

1 OIL-FIRED WARM AIR FURNACE P2HMX12F08001 P3HMX14F10001 P3HMX20F12001 (Upflow or Horizontal Models) P3LBX12F08001 P3LBX14F12001 (Lowboy Models)

10 high limit test is successful, shut off the electrical power to the furnace, restore the proper motor wiring. Finally, restore power to the furnac

11 TABLE A-1: BECKETT OIL BURNER SET-UP BECKETT AFG SERIES OIL BURNERS FURNACE MODEL OUTPUT BTU/Hr. BURNER MODEL NOZZLE (Delavan) PUMP PRESSURE FLOW

12 TABLE A-2: DIRECT DRIVE BLOWER SET-UP (continued) BLOWER SET-UP COOLING CAPACITY 0.20 in. w.c. 0.50 in. w.c. FURNACE OUTPUT BTU/Hr. BLOWER MOTO

13 TABLE A-3: DIRECT DRIVE BLOWER CHARACTERISTICS (continued) CFM External Static Pressure – inches w.c. FURNACE MODEL BLOWER MOTOR HP MOTOR FLA TEM

14 GENERAL DIMENSIONS – P*HMX MODELS TABLE A-4: GENERAL DIMENSIONS (Inches) – P*HMX MODELS Cabinet Plenum Openings Flue Supply Air Return Air Width

15 GENERAL DIMENSIONS – P3LBX MODELS TABLE A-5: GENERAL DIMENSIONS (Inches) – P3LBX MODELS Cabinet Plenum Openings Flue Width A Length B Height C S

16 APPENDIX B: WIRING DIAGRAM

17 WIRING NOTES CONTINUOUS FAN OPERATION: The ST9103 EFT has provisions to run the blower motor continuously on a speed lower than the cooling or hea

18 R7184 Detailed Sequence of Operation Power is applied to unit. The R7184 completes a self-diagnostic procedure. If no light or flame is present,

19 IDLE STATE THERMOSTAT CALLS FOR HEAT SAFETY CHECK FOR FLAME (5 SEC.) BURNER MOTOR & IGNITOR START SOLENOID VALVE OPENS TRIAL FOR IGNITION

2 IMPROPER INSTALLATION MAY CRE-ATE A CONDITION WHERE THE OP-ERATION OF THE PRODUCT COULD CAUSE PERSONAL INJURY OR PROPERTY DAMAGE. IMPROPER INSTALL

20 Table C-1: ST9103 DETAILED SEQUENCE OF OPERATION Mode Action System Response Thermostat calls for heat. ("W" terminal is energized). a.

21 R7184 LED Diagnostic Light The LED diagnostic light has several functions. It indicates the state or mode in which the oil burner is operating. It

22Indicator light is on. Cad cell is defective, sees external light, or connections have shorted. Go to step 4. 3. Check indicator light with burne

23 Table C-3: R7184 Troubleshooting continued from previous page Procedure Status Corrective Action Indicator light turns off. Eliminate external

24 Table C-3: R7184 Troubleshooting continued from previous page Procedure Status Corrective Action Indicator light is on. Remount control onto b

25Table C-4: System and General Troubleshooting continued Problem Possible Cause Remedy Photo Cell wiring shorted or room light leaking into phot

26Table C-4: System and General Troubleshooting continued Problem Possible Cause Remedy System temperature rise too high. System temperature rise

27 Table C-4: System and General Troubleshooting continued Problem Possible Cause Remedy Airflow blocked or dirty air fil-ter. Clean or replace ai

28REPAIR PART LIST – P3HMX14F10001 & P3HMX20F12001 ITEM DESCRIPTION 1 Assembly. Left Side Panel (Tan) 2 Assembly, Right Side Panel (Tan) 3

29REPAIR PART LIST – P3LBX12F08001A & P3LBX14F12001A ITEM DESCRIPTION 1 Panel Assembly, Left Side (Tan) 2 Panel Assembly, Right Side (Tan)

3 In the upflow position, the heat ex-changer support screw shown in the picture may be removed. This may be preferable if the furnace rear panel wil

30REPAIR PART LIST – P2HMX12F08001 ITEM DESCRIPTION 1 Assembly. Left Side Panel (Tan) 2 Assembly, Right Side Panel (Tan) 3 Assembly, Rear Panel

31 REPLACEMENT PART CONTACT INFORMATION This is a generic parts list. To request a complete parts list, refer to the contact information below: • C

Subject to change without notice. Printed in U.S.A. 035-17473-001 Rev. A (0503) Copyright by Unitary Product Group 2003. All rights reserved.

4 SUSPENDED INSTALLATION Refer to Figure 1. Maintain clearances to combustibles as outlined in Table 1. The furnace may be suspended by field fabri-c

5 Fig. 2: Common Chimney Problems Table 2: Common Chimney Problems Refer to Figure 2 Key Trouble Diagnostic Remedy A Top of chimney lower than s

6 Table 3: Minimum Chimney Base Temperatures (°F) Chimney Height (ft.) Nozzle 11 20 28 36 Chimney Thermal Resistance < R6 0.50 300 400 535 725 0.

7 Accessories requiring 120 VAC power sources such as electronic air cleaners and humidifier transformers may be powered from the ST9103 EFT. Do not

8 OIL BURNER P*HMX and P*LBX furnaces are equipped with Beckett AFG Series oil burners. The oil burner must align prop-erly with the cerafelt fiber c

9 The Beckett burner bulk air band is should be closed, and the air shutter initial setting should be approximately 7.00. Note A: Locate hole at leas