Honeywell EC7895A - Manuals

Page 8 - PRINCIPAL TECHNICAL FEATURES; Internal Hardware Status Monitoring

7800 SERIES EC7895A, RM7895A RELAY 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) C7076...

Page 9 - INSTALLATION; WARNING

7800 SERIES EC7895A, RM7895A RELAY MODULE 65-0205 9 Dynamic Ampli-Check® Dynamic AMPLI-CHECK® circuitry tests the flame signalamplifier during burner operation and shuts down the EC7895or RM7895 if the flame amplifier fails. Dynamic Flame Amplifier and Shutter Check Self-checking circuitry tests all...

Page 10 - When Installing this Product...; CAUTION; Humidity

7800 SERIES EC7895A, RM7895A RELAY MODULE 65-0205 10 When Installing this Product… 1. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardouscondition. 2. Check the ratings given in the instructions and marked on the product to make sure the product is...

Page 11 - WIRING

7800 SERIES EC7895A, RM7895A RELAY MODULE 65-0205 11 CONFIGURATION JUMPERS MICROCOMPUTER RESET PUSHBUTTON RUN/TESTSWITCH STATUS LEDs PLUG-IN PURGE TIMER CARD SAFETY RELAY CIRCUIT POWER SUPPLY OPTIONAL KEYBOARD DISPLAY MODULE PLUG-INFLAMEAMPLIFIER RELAYDRIVE CIRCUIT CONTROLPOWER TESTJACK REMOTERESET ...

Page 14 - ASSEMBLY; Relay Module Mounting; Installing ST7800 Purge Card

7800 SERIES EC7895A, RM7895A RELAY MODULE 65-0205 14 ASSEMBLY Mounting RM7895 NOTE: For installation dimensions, see Fig. 1 or 2. Relay Module Mounting 1. Mount the EC7895 or RM7895 vertically, see Fig. 9 or 10, or mount horizontally with the knife blade terminalspointing downward. When mounted on t...

Page 16 - C7076A,D ULTRAVIOLET DETECTOR

7800 SERIES EC7895A, RM7895A RELAY 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 (C7015) ULTRAVIOLET (C7027/C7035/C7044) SOLID STATE SELF-CHECKING ULTRAVIOLET (C7012E,F) BLUE YELLOW BLA...

Page 17 - OPERATION

7800 SERIES EC7895A, RM7895A RELAY MODULE 65-0205 17 OPERATION Sequence of Operation The EC7895 or RM7895 has the following operatingsequences, see Fig. 15. Initiate The EC7895 or RM7895 enters the INITIATE sequence whenthe Relay Module is powered. The EC7895 or RM7895 canalso enter the INITIATE seq...

Page 20 - CHECKOUT; Equipment Recommended

7800 SERIES EC7895A, RM7895A RELAY MODULE 65-0205 20 CHECKOUT WARNING Do not allow fuel to accumulate in the combustionchamber. If fuel is allowed to enter the chamber forlonger than a few seconds without igniting, anexplosive mixture could result. It is recommended thatyou limit the trial for pilot...

Page 21 - Initial Lightoff Check for Proved Pilot

7800 SERIES EC7895A, RM7895A RELAY MODULE 65-0205 21 Flame Detector Acceptable Flame Signal Amplifier Minimum Maximum Steady DC Voltage a Expected DC Voltage Flame Rod PhotocellC7012A,C R7847A,B b 1.25 Vdc 5.0 Vdc at the Keyboard Display Module C7012E,F R7847C c C7015A R7848A,B b OR C7027A C7035A C7...

Page 23 - Initial Lightoff Check for Direct Spark Ignition

7800 SERIES EC7895A, RM7895A RELAY MODULE 65-0205 23 Initial Lightoff Check for Direct Spark Ignition This check applies for gas and oil burners that do not use apilot. It should immediately follow the preliminary in-spection.Refer to the appropriate sample block diagram of field wiringfor the ignit...

Page 26 - TROUBLESHOOTING; Diagnostic Information Index

7800 SERIES EC7895A, RM7895A RELAY MODULE 65-0205 26 TROUBLESHOOTING EC7895 or RM7895 System Diagnostics Troubleshooting control system equipment failures is easierwith the 7895 self-diagnostics and first-out annunciation. Inaddition to an isolated spst alarm relay (audible annunciation),the 7895 pr...

Honeywell EC7895A - Manuals

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Manual Honeywell EC7895A

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Honeywell Manuals