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Honeywell RM7840M manual

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Table of contents for the manual

  • Page 1

    INSTALLATION INSTRUCTIONS 66- 1085- 3 ® U.S. Registered T rademark Copyright © 2002 Honeywell • All Rights Reserved RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES Relay Modules APPLICATION The Hon eywell RM7800/R M784 0 Relay Mo dules are microproce ssor-based i ntegrate d burner c ontrols fo r automati cally fi red gas , oil, or combin ation fuel si[...]

  • Page 2

    RM7800E,G ,L,M; RM7840E,G ,L,M 7800 SERIES RELAY MO DULES 66-1085—3 2 WARNING Fire or Ex plosion Haza rd. Can cause property dama ge, sev ere injury , or deat h. T o prevent possibl e hazardous burner operation, verify safety requirements each time a co ntrol is inst alled on a bur ner . WARNING Electrical Sh ock Hazard. Can cause serious injury [...]

  • Page 3

    RM7800E,G ,L,M; RM78 40E,G,L,M 780 0 SERIES R ELAY MODULES 3 66-1085—3 4. All wir ing mu st co mply with all appli cable electric al codes, ordina nces and regula tions . Wiring , where required, must com ply wit h NEC, Class 1 (Line V oltage) wiring. 5. Recomm ended wire siz e and typ e: see T able 1. 6. Recomm ended groundi ng practi ces: see T[...]

  • Page 4

    RM7800E,G ,L,M; RM7840E,G ,L,M 7800 SERIES RELAY MO DULES 66-1085—3 4 Fig. 1. Inte rnal block diagram of the RM780 0L/RM7840L (See Fig. 2, 3, 4 or 5 for individ ual deta iled wiri ng instructions ). CONFIGURATION JUMPERS MICROCOMPUTER RESET PUSHBUTTON RUN/TEST SWITCH STATUS LEDs PLUG-IN PURGE TIMER CARD SAFETY RELAY CIRCUIT POWER SUPPLY KEYBOARD [...]

  • Page 5

    RM7800E,G ,L,M; RM78 40E,G,L,M 780 0 SERIES R ELAY MODULES 5 66-1085—3 T able 2. Recommended Groundi ng Practice s. T able 3. T ermina l Ratings. . a The re lay modu le mu st have a n earth ground providin g a co nnection betwe en the subbase and th e cont rol pan el or the equipm ent. The earth g round wi re must b e capabl e of co nducti ng the[...]

  • Page 6

    RM7800E,G ,L,M; RM7840E,G ,L,M 7800 SERIES RELAY MO DULES 66-1085—3 6 T able 4. Combinat ions for T er minals 8, 9 , 10 and 21. T able 5. Explana tion of Eac h Combination . Mountin g RM78 00/RM 7840 Relay Module (Fig. 5) 1. Mount th e RM7800/RM 7840 verticall y on t he Q7800 Subbase , or mo unt hori zontally with th e knif e blad e termina ls po[...]

  • Page 7

    RM7800E,G ,L,M; RM78 40E,G,L,M 780 0 SERIES R ELAY MODULES 7 66-1085—3 Fig. 2. Wiring subbase and sequence for RM7800 E,L/RM7840E,L . M12261C G L2 3 4 4 5 5 6 7 8 9 10 F (L1) 13 14 15 16 17 18 19 20 21 22 12 LOCKOUT INTERLOCKS (INC. AIR FLOW SWITCH) MASTER SWITCH LOW FIRE START SWITCH 5 SECOND IGNITION (EARLY SPARK TERMINATION) MAIN FUEL VALVE(S)[...]

  • Page 8

    RM7800E,G ,L,M; RM7840E,G ,L,M 7800 SERIES RELAY MO DULES 66-1085—3 8 Fig. 3. W iring subbase and sequen ce for RM7800 G/RM7840 G. RM7800G/RM7840G POWER OPERATING CONTROLS AND INTERLOCKS BURNER FLAME SIGNAL FIRING RATE MOTOR INITIATE (INITIAL POWERUP ONLY) POWER STANDBY PREPURGE HOLD DRIVE TO LOW FIRE POWER PILOT FLAME MAIN POWER PFEP 10 SEC. (4 [...]

  • Page 9

    RM7800E,G ,L,M; RM78 40E,G,L,M 780 0 SERIES R ELAY MODULES 9 66-1085—3 Fig. 4. Wiring subbase and sequen ce for RM780 0M/RM7840 M. M12262A G L2 3 4 5 6 7 8 9 10 F (L1) 13 14 15 16 17 18 19 20 21 22 12 MASTER SWITCH LOW FIRE START SWITCH 5 SECOND IGNITION (EARLY SPARK TERMINATION) MAIN FUEL VALVE(S) BURNER CONTROLLER/LIMITS BURNER MOTOR (BLOWER) C[...]

  • Page 10

    RM7800E,G ,L,M; RM7840E,G ,L,M 7800 SERIES RELAY MO DULES 66-1085—3 10 Fig. 5. RM7800 /RM7840 R elay Module exploded vie w . SAFETY SHUTDOWN Safety Shutdown (Lockout) o ccurs if any of the following oc cur du ring the indicated period: 1. INITIA TE Period: a. Purge car d is n ot install ed or i s removed. b. Purge car d is b ad. c. Config uration[...]

  • Page 11

    RM7800E,G ,L,M; RM78 40E,G,L,M 780 0 SERIES R ELAY MODULES 1 1 66-1085— 3 g. Lockout In terloc k opens d uring PREPURGE (RM7840E,L). h. Ignition /pilot valve/i ntermi ttent pi lot valv e term inal is energiz ed. i. Main v alve term inal i s energiz ed. j. Internal system fault o ccurred . k. P urge c ard i s rem oved. l. Purge car d is b ad. 4. P[...]

  • Page 12

    RM7800E,G ,L,M; RM7840E,G ,L,M 7800 SERIES RELAY MO DULES 66-1085—3 12 Ignition Trials 1. Pilo t F lame Es tabli shi ng Peri od ( PFEP ): a. With the firing rate mo tor at the l ow fire p ositio n: (1) The pilot valv e and igniti on transfo rmer , termina ls 8, 1 0 and 2 1, are ene rgized . The RM7800M has an i ntermitten t pilot valve, termina l[...]

  • Page 13

    RM7800E,G ,L,M; RM78 40E,G,L,M 780 0 SERIES R ELAY MODULES 13 66-1085—3 Keyboard Disp lay Module (VFD) The Keyboard Display Module (see Fig. 5) is provided with the RM7800 R elay Module (but is not requir ed f or operatio n) and is an op tion fo r the RM7840 Rel ay Modu le. Th e first line of the V acuum Fluo resce nt Display (VFD) p rovid es: ?[...]

  • Page 14

    RM7800E,G ,L,M; RM7840E,G ,L,M 7800 SERIES RELAY MO DULES 66-1085—3 14 T able 7. Sit e Configurable J umper Optio ns. a Pilot V alv e /First Sta ge Oi l V alve (V alve/S tart) T erminal 21. b A 30 sec ond MFEP c an be a ccompl ished by addin g a ju mper wire be tween T erminals 19 and 5. SER VICE NOTE :Clipp ing and re movi ng a s ite-config urab[...]

  • Page 15

    RM7800E,G ,L,M; RM78 40E,G,L,M 780 0 SERIES R ELAY MODULES 15 66-1085—3 T able 8. Static C heckout. Te s t No. RM780 0/ RM7840 Models Te s t Jumper s V oltmete r Normal Opera tion If Operation is Abnormal, Check the Items Listed Be low 1 All None 4-L2 Line volta ge at T erminal 4. 1. Maste r Switch. 2. Power conne cted to the Mast er Switch . 3. [...]

  • Page 16

    66-1085—3 G.R. Rev . 02-02 www .honeywell.com RM7800E,G ,L,M; RM7840E,G ,L,M 7800 SERIES RELAY MO DULES Autom ati on and Contr ol Solut ions Honeywell Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, M N 55422 Scarborough, Ont ario M1V 4Z9 Printed in U.S.A. on recycled paper containing at least 10% pos[...]