Instruction/ maintenance manual of the product EC7895A Honeywell
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PRODUCT DA T A Copyright © 1996 Honeywell Inc. • All Rights Reserved X-XX UL 7800 SERIES EC7895A, RM7895A Relay Module GENERAL The Y amatake Hone ywell EC7895A and RM7895 is a microprocessor based integrated burner control for automatically fired gas, oil, or combination fuel single burner applications.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 2 ORDERING INFORMA TION When purchasing replacement and modernization products from your TRADELINE® wholesaler or distr ib utor , refer to the TRADELINE® Catalog or price sheets for complete ordering number .
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 3 Model: EC7895 Electrical Ratings, see T able 1B: V oltage and Frequency: 200 V ac (+10/-15%), 50 or 60 Hz (+/- 10%). 1 Power Dissipation: EC7895: 10W maximum. Maximum T otal Connected Load: 2000 V A.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 4 En vironmental Ratings: Ambient T emperature: Operating: -40 ° F to 140 ° F. Storage: -60 ° F to 150 ° F. Humidity: 85% RH continuous, noncondensing. Vibration: 0.5G environment. Dimensions: Refer to Fig.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 5 Sequence Timing For Normal Operation: Flame Establishing Period Device Initiate Standby Purge Pilot Main EC7895A/RM7895A 10 sec. * ** 4 or 10 sec. No *S T ANDBY and R UN can be an infinite time period.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 6 Fig. 2. Mounting dimensions of EC7895/RM7895 Rela y Module and Q7800B Subbase in in. (mm). POWER PILOT FLAME MAIN ALARM RESET 5 (127) 5 (127) M11134 REMOVE ONLY FOR TERMINAL TEST ACCESS. 1 1 6-3/32 (155) BURNER CONTROL Fig.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 7 Fig. 4. Ultraviolet detectors in in. (mm). COLLAR WITH 1/2-14 NPSM INTERNAL THREADS 4 (102) 6 FOOT (1.83 METER) LEADWIRES (2) M1943A MODEL AVAILABLE WITH 24 FOOT (7.32 METER) LEADWIRES. MODELS AVAILABLE WITH SPUD CONNECTOR (1/2-14 NPSM INTERNAL THREADS) INSTEAD OF CLAMP TYPE CONNECTOR.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 8 Fig. 4. Ultraviolet detectorsin in. (mm) (Continued). 15/16 [24] DIA. 2 (51) 1 (25) 1 INCH NPT 15/16–18 UNC (2 EACH) M5084A 2-1/2 (64) 6-7/32 (158) 6-19/32 (168) 2-5/32 (55) 11-13/16 (300) 7-13/16 (198) 1-27/32 (47) 5-13/16 (147) 5-13/16 (147) C7076D Fig.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 9 Dynamic Ampli-Check ® Dynamic AMPLI-CHECK® circuitry tests the flame signal amplifier during burner operation and shuts down the EC7895 or RM7895 if the flame amplifier fails.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 10 When Installing this Product… 1. Read these instructions carefully . F ailure to f ollow them could damage the product or cause a hazardous condition. 2. Check the ratings given in the instructions and marked on the product to make sure the product is suitable for your application.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 11 CONFIGURATION JUMPERS MICROCOMPUTER RESET PUSHBUTTON RUN/TEST SWITCH STATUS LEDs PLUG-IN PURGE TIMER CARD SAFETY RELAY CIRCUIT POWER SUPPLY OPTION.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 12 b. For EC7895 or RM7895, each device has an earth ground terminal that must be grounded to the metal control panel with wire as short as practical. Each ground wire must be capable of carrying a fault current equal to the rating of the protective fuse (20A).
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 13 Fig. 8. Wiring the EC7895. M11074 G L2 3 5 6 7 8 9 10 F (L1) 13 14 15 16 17 18 19 20 21 22 12 MASTER SWITCH IGNITION MAIN FUEL VALVE(S) BURNER CON.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 14 ASSEMBL Y Mounting RM7895 NOTE: For installation dimensions, see Fig. 1 or 2. Relay Module Mounting 1. Mount the EC7895 or RM7895 v er tically , see Fig. 9 or 10, or mount horizontally with the knife blade terminals pointing downward.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 15 Fig. 10. W all or burner installation. Fig. 11. ST7800 Purge Card installation. Fig. 12. Dust Cover mounting.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 16 Fig. 14. Flame detector wiring. BLUE YELLOW WHITE WHITE WHITE WHITE BLACK BLACK F G 22 L2 L1 L2 M11131 BLUE WHITE F G WHITE BROWN F G INFRARED (C7.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 17 OPERA TION Sequence of Operation The EC7895 or RM7895 has the following operating sequences, see Fig. 15. Initiate The EC7895 or RM7895 enters the INITIA TE sequence when the Relay Module is po wered.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 18 Equipment Recommended 1. V oltmeter (1M ohm/volt minimum sensitivity) set on the 0-300 V ac scale. 2. T wo jumper wires; no. 14 wire, insulated, 12 inches (304.8 mm) long, with insulated alligator clips at both ends.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 19 Ta b le 3. Site Configurab le Jumper Options. Jumper Number Description Intact Clipped JR1 Pilot Flame Establishing Period 10 seconds 4 seconds JR2 Flame Failure Action Recycle Lockout JR3 Airflow Switch (ILK) Failure Recycle Lockout Fig.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 20 CHECKOUT W ARNING Do not allow fuel to accumulate in the combustion chamber . If fuel is allowed to enter the chamber f or longer than a few seconds without igniting, an explosive mixture could result.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 21 Flame Detector Acceptable Flame Signal Amplifier Minimum Maximum Steady DC Voltage a Expected DC Voltage Flame Rod Photocell C7012A,C R7847A,B b 1.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 22 NOTE: Low fuel pressure limits, if used, could be open. If so, bypass them with jumpers during this check. 1. Open the master switch. 2. Make sure that the man ual main fuel shutoff valv e(s) is closed.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 23 Initial Lightoff Check for Direct Spark Ignition This check applies for gas and oil burners that do not use a pilot. It should immediately follow the preliminary in-spection. Refer to the appropriate sample block diagram of field wiring for the ignition transformer and fuel valve(s) hookup.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 24 c. T ur n the pilot back do wn slightly but not enough to cause the FLAME LED to go out. (Keep the pilot gas pressure just above the reading noted in step 6 above.) NOTE: Step d requires two people, one to open the manual main fuel valve(s) and one to watch for ignition.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 25 If the detector is sensing hot refractory , the condition must be corrected. Add an orifice plate in front of the cell to restrict the viewing area of the detector . If this does not correct the problem, resight the detector at a cooler , more distant par t of the combustion chamber .
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 26 TROUBLESHOOTING EC7895 or RM7895 System Diagnostics T roubleshooting control system equipment f ailures is easier with the 7895 self-diagnostics and first-out annunciation.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 27 Ta b le 6. Sequence And Status Hold Information. NOTE: Normal sequences are in bold type , while abnormal sequences are not in bold type.
7800 SERIES EC7895A, RM7895A RELA Y MODULE 65-0205 28 Honeywell Europe S.A. 3 Avenue du Bourget B-1140 Brussels Belgium Honeywell Asia Pacific Inc. Room 3213-3225 Sun Hung Kai Centre No.
An important point after buying a device Honeywell EC7895A (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Honeywell EC7895A yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Honeywell EC7895A - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Honeywell EC7895A you will learn all the available features of the product, as well as information on its operation. The information that you get Honeywell EC7895A will certainly help you make a decision on the purchase.
If you already are a holder of Honeywell EC7895A, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Honeywell EC7895A.
However, one of the most important roles played by the user manual is to help in solving problems with Honeywell EC7895A. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Honeywell EC7895A along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
