Instruction/ maintenance manual of the product RM7824A Honeywell
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PRODUCT DA T A Copyright © 1995 Honeywell Inc. • All Rights Reserved 7800 SERIES RM7824A Relay Module • First-out annunciation and system dia gnostics are pro vided by a 2-row b y 20-column V acuum Fluorescent Display (VFD) located on the optional Ke yboard Displa y Module.
7800 SERIES RM7824A RELA Y MODULE 65-0155—1 2 SPECIFICA TIONS Model: RM7824A Rela y Module for the 7800 SERIES . Electrical Ratings (See T able 1): V oltage: 24 Vdc (22-28 Vdc). Po w er Dissipation: 10W maximum. Maximum T otal Connected Load: 500 V A.
7800 SERIES RM7824A RELA Y MODULE 65-0155—1 3 We i ght: RM7824A with Dust Cov er : 1 pound, 12 ounces, unpac ked. IMPORT ANT Flame Detection System av ailable for use with RM7824A. T o select your Plug-in Flame Signal Amplifier and applicable Flame Detector , see T able 2 and Fig.
7800 SERIES RM7824A RELA Y MODULE 65-0155—1 4 5 (127) 5 (127) M5873 BURNER CONTROL REMOVE ONLY FOR TERMINAL TEST ACCESS. 1 1 6-3/32 (155) Fig. 2. Mounting dimensions of RM7824A Rela y Module and Q7800B Subbase in in. (mm). Dust Cover is part number 221729A.
7800 SERIES RM7824A RELA Y MODULE 65-0155—1 5 PRINCIP AL TECHNICAL FEA TURES The RM7824A provides all customary flame safeguard functions while providing significant adv ancements in the areas of saf ety , annunciation and system diagnostics. Safety Shutdown (Lockout) Occurs If: 1.
7800 SERIES RM7824A RELA Y MODULE 65-0155—1 6 First-out Annunciation repor ts the cause of a saf ety shutdown or identifies the cause of a f ailure to star t or continue the bur ner control sequence with an English te xt and numbered code via the optional K eyboard Displa y Module.
7800 SERIES RM7824A RELA Y MODULE 65-0155—1 7 WIRING 1. a. F or the internal block diagram of the RM7824A, see Fig. 5. b. F or proper subbase wiring, refer to Fig.
7800 SERIES RM7824A RELA Y MODULE 65-0155—1 8 7. Make sure loads do not e xceed the ter minal ratings . Ref er to the label on the RM7824A or to the ratings in the specifications; see T able 1. 8. Check the po wer supply circuit. The voltage tolerance m ust match those of the RM7824A.
7800 SERIES RM7824A RELA Y MODULE 65-0155—1 9 ASSEMBL Y Mounting RM7824A NO TE: F or installation dimensions , see Fig. 1 or 2. Relay Module Mounting 1. Mount the RM7824A v er tically , see Figs. 7 or 8, or mount horizontally with the knife b lade ter minals pointing downward.
7800 SERIES RM7824A RELA Y MODULE 65-0155—1 10 Fig. 10. Flame signal amplifier mounting. Installing Flame Detector NO TE: Ta b le 2 and Fig. 11 list the flame detectors availab le f or use with the RM7824A. Make sure the correct combination of amplifier and flame detector(s) is used.
7800 SERIES RM7824A RELA Y MODULE 65-0155—1 11 CAPTIVE MOUNTING SCREW DUST COVER RELAY MODULE FLAME AMPLIFIER FLAME CURRENT TEST JACK FLAME SIMULATOR INPUT SEQUENCE STATUS LEDS RESET PUSH- BUTTON M7593 Fig.
7800 SERIES RM7824A RELA Y MODULE 65-0155—1 12 Ta b le 4. Site-Configurable Jumper Options. Jumper Number Description Intact Clipped JR1 Pilot Flame Establishing Period 10 seconds 4 seconds IMPORT ANT After 200 hours of operation, the configuration jumper cannot be changed.
7800 SERIES RM7824A RELA Y MODULE 65-0155—1 13 Ta b le 5. Static Checkout (Continued). Test No. RM7824A Models Test Jumpers Voltmeter Normal Operation If Operation is Abnormal, Check the Item Listed Below 4A ll 3-8 — 1. Ignition spark (if ignition transformer relay is connected to terminal 8).
7800 SERIES RM7824A RELA Y MODULE 65-0155—1 14 • Hot refractory hold-in test—all installations. • Ignition spark pickup—all installations using Ultra violet Flame Detectors. • Response to other ultraviolet sources—all installations using Ultra violet Flame Detectors.
7800 SERIES RM7824A RELA Y MODULE 65-0155—1 15 6. Make sure that the detector is properly sighting the flame. 7. If necessar y , resight or reposition the detector . Initial Lightoff Check for Proved Pilot. P erform this check on all installations that use a pilot.
7800 SERIES RM7824A RELA Y MODULE 65-0155—1 16 Initial Lightoff Check for Direct Spark Ignition This check applies f or gas and oil bur ners that do not use a pilot and it should immediately f ollow the preliminary inspection. Refer to the appropriate sample bloc k diagram of field wiring for the ignition transf or mer and fuel v alve(s) hookup .
7800 SERIES RM7824A RELA Y MODULE 65-0155—1 17 b. As the control attempts to relight the pilot, increase the pilot pressure immediately until the FLAME LED comes on, and then slowly turn it down to obtain a pressure reading just abov e the dropout point or until the flame signal increases to appro ximately 1.
7800 SERIES RM7824A RELA Y MODULE 65-0155—1 18 IMPORT ANT 1. If the RM7824A fails to shut do wn on any of these tests, tak e correctiv e action (refer to T roubleshooting, RM7824A diagnostics and return to the beginning of all Checkout tests). 2. When all Check out tests hav e been completed, reset all s witches to original states.
7800 SERIES RM7824A RELA Y MODULE 65-0155—1 19 Ta b le 7. Sequence And Status Hold Information. NO TE: Normal sequences are in bold type , while abnormal sequences are in standard type.
7800 SERIES RM7824A RELA Y MODULE 65-0155—1 20 Helping You Control Your World Home and Building Control Honeywell Limited-Honeywell Limitée 740 Ellesmere Road Scarborough, Ontario M1P 2V9 65-0155—1 Re v . 6-95 G.R. Printed in U .S.A. www .honeywerll.
An important point after buying a device Honeywell RM7824A (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 RM7824A 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 RM7824A - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Honeywell RM7824A you will learn all the available features of the product, as well as information on its operation. The information that you get Honeywell RM7824A will certainly help you make a decision on the purchase.
If you already are a holder of Honeywell RM7824A, 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 RM7824A.
However, one of the most important roles played by the user manual is to help in solving problems with Honeywell RM7824A. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Honeywell RM7824A 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