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Honeywell 7800 SERIES Installation Manual Download Page 8

RM7885A 7800 SERIES RELAY MODULES

32-00215—01

8

Fig. 4. High-low or modulating burner wiring diagram.

M15103A

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

LOW FIRE MOTOR

END SWITCH

INTERMITTENT

PILOT

FLAME DETECTOR

120 VAC, 50/60 HZ (RM7885A); 220-240 VAC, 50/60 HZ (EC7885A) POWER SUPPLY.  

PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

DO NOT CONNECT ANY WIRES TO UNUSED TERMINALS.

SEE FLAME DETECTOR SPECIFICATION FOR CORRECT WIRING.

220.240 VAC TO 120 VAC, 10 VA MINIMUM STEP-DOWN TRANSFORMER 

(NOT PROVIDED) REQUIRED TO DRIVE SHUTTER (EC7885A ONLY).

 ALARM

L1 

(HOT)

L2

Q7800

4

1

2

2

1

LIMITS

STOP

S445A

START-STOP

STATION

START

B

A

D

C

INTERNAL

JUMPER

DPST ALARM

SILENCING

SWITCH

FUEL

PRESSURE

SWITCH

MANUAL

VALVE

1

2

6

7

8

R

W

B

R

W

B

T

T

CONTROLLER

HI-LO OR

MODULATING

MOTOR

R482B

3

4

3

4

Summary of Contents for 7800 SERIES

Page 1: ... conventional knee or foot operated start stop station 3 Direct ignition oil burner or electrically ignited pilot using the S445A Start Stop Station which main tains electric ignition as long as the Start Switch is depressed up to 15 minutes This document provides installation and static checkout instructions Other applicable publications are SPECIFICATIONS Electrical Ratings See Table 3 Voltage a...

Page 2: ...y with NEC Class 1 Line Volt age wiring 4 Loads connected to the RM7885A must not exceed those listed on the RM7885A label or the Specifications see Table 1 5 Limits and interlocks must be rated to simultane ously carry and break current to the ignition trans former pilot valve and main fuel valve s 6 All external timers must be listed or component recognized by authorities who have proper jurisdi...

Page 3: ...on compatible 1000 series subbase this indi cates that you must Change out the subbase to a Q7800A2003 U or Q7800A2005 U Choose a compatible 1000 series relay module Relay Module and Subbase Compatiblity NOTE There are several different subbase models that can be purchased It is important to note which subbase is compatible with the relay module when purchasing new repair or replacement parts Seri...

Page 4: ...me detector leadwires without armor cable in metal cable or conduit d Follow directions in flame detector Data Control Bus Module or Remote Reset Module Instruc tions 8 For KDM because the KDM is powered from a low voltage energy limited source it can be mounted outside of a control panel if it is protected from mechanical damage NOTE A 13 Vdc power supply must be used any time more than one KDM i...

Page 5: ...isted pair with ground or five wire Belden 8723 shielded cable or equivalent Remote Reset Module 22 AWG two wire twisted pair insulated for low voltage Communication Interface ControlBus Module 22 AWG two wire twisted pair with ground Belden 8723 shielded cable or equivalent 13 Vdc full wave rectified transformer power input 18 AWG wire insulated for voltages and temperatures for given application...

Page 6: ... short circuit Use wide straps or brackets to provide minimum length maximum surface area ground conductors If a leadwire must be used use 14 AWG copper wire Make sure that mechanically tightened joints along the ground path are free of nonconducting coatings and protected against corrosion on mating surfaces Signal ground KDM Data ControlBus Module Communications Interface ControlBus Module Use t...

Page 7: ...D ALARM SILENCING SWITCH CLOSED INTERMITTENT PILOT SAFE START CHECK FLAME PROVING LED DISPLAY POWER PILOT FLAME MAIN PFEP POWER SAFE START POWER POWER LIMITS STOP STATION AND SILENCING SWITCH FLAME SIGNAL EC RM7885 M15109A 00 00 15 MINUTES L1 TO 6 9 8 10 FOR DIRECT SPARK IGNITION OIL OR GAS 8 MAIN VALVE L2 9 3 4 5 2 1 RM7785A 120 VAC 50 60 HZ EC7885A 220 240 VAC 50 60 HZ POWER SUPPLY PROVIDE DISCO...

Page 8: ...PPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED DO NOT CONNECT ANY WIRES TO UNUSED TERMINALS SEE FLAME DETECTOR SPECIFICATION FOR CORRECT WIRING 220 240 VAC TO 120 VAC 10 VA MINIMUM STEP DOWN TRANSFORMER NOT PROVIDED REQUIRED TO DRIVE SHUTTER EC7885A ONLY ALARM L1 HOT L2 Q7800 4 1 2 2 1 LIMITS STOP S445A START STOP STATION START B A D C INTERNAL JUMPER DPST ALARM SILENCING SWITCH...

Page 9: ...ROTECTION AS REQUIRED DO NOT CONNECT ANY WIRES TO UNUSED TERMINALS SEE FLAME DETECTOR SPECIFICATION FOR CORRECT WIRING 220 240 VAC TO 120 VAC 10 VA MINIMUM STEPDOWN TRANSFORMER NOT PROVIDED REQUIRED TO DRIVE SHUTTER EC7885A ONLY ALARM ALARM L1 HOT L2 Q7800 4 1 2 2 1 LIMITS STOP S445A START STOP STATION START B A D C INTERNAL JUMPER DPST ALARM SILENCING SWITCH G L2 3 5 6 7 8 9 10 F L1 13 14 15 16 1...

Page 10: ...ERMINALS SEE FLAME DETECTOR SPECIFICATION FOR CORRECT WIRING 220 240 VAC TO 120 VAC 10 VA MINIMUM STEPDOWN TRANSFORMER NOT PROVIDED REQUIRED TO DRIVE SHUTTER EC7885A ONLY ALARM L1 HOT L2 Q7800 4 FLAME DETECTOR 1 2 2 1 LIMITS STOP S445A START STOP STATION START B A D C INTERNAL JUMPER DPST ALARM SILENCING SWITCH FUEL PRESSURE SWITCH MANUAL VALVE 1 2 6 7 8 R W B R W B T T CONTROLLER HI LO OR MODULAT...

Page 11: ...e all manual fuel shutoff valve s before starting these tests 2 Use extreme care while testing the system Line voltage is present on most terminal connections when power is on 3 Open the master switch before installing or removing a jumper on the subbase 4 Before continuing to the next test be sure to remove test jumper s used in the previous test 5 Replace all limits and interlocks that are not o...

Page 12: ...l damaged or incorrectly sized wires 8 Replace faulty controllers limits interlocks actua tors valves transformers motors and other devices as required 9 Make sure normal operation is obtained for each required test before continuing the checkout 10 After completing each test be sure to remove the test jumper s WARNING Explosion Hazard Can cause severe injury death or property damage Be sure all m...

Page 13: ...e inch 76 mm minimum to both sides of the RM7885A for electrical sig nal voltage probes 3 Make sure no subbase wiring is projecting beyond the terminal blocks Tuck in wiring against the back of the subbase so it does not interfere with the knife blade terminals or bifurcated contacts IMPORTANT The RM7885A must be installed with a plug in motion rather than a hinge action Terminal No Description Ra...

Page 14: ...e INITIATE sequence lasts for ten seconds unless the voltage or frequency tolerances are not met When not met a hold condition is initiated and displayed on the optional KDM for at least five seconds when met the INITIATE sequence restarts If the condition is not corrected and the hold condition exists for four minutes the RM7885A locks out Causes for hold conditions in the INITIATE sequence a AC ...

Page 15: ...pplied via Run Test switch label seal It is intended to prevent and detect unauthorized access Modbus DDL Interface security Any conducts critical to device functionality DDL Modbus lines etc shall be physically protected installed outside public access since they could be damaged or tampered with by unauthorized people either accidentally or for purpose Modbus RS 485 DDL protocols do not support ...

Page 16: ...Kromschröder and Maxon To learn more about our products visit ThermalSolutions honeywell com or contact your Honeywell Sales Engineer Honeywell Process Solutions Honeywell Thermal Solutions HTS 1250 West Sam Houston Parkway South Houston TX 77042 ThermalSolutions honeywell U S Registered Trademark 2019 Honeywell International Inc 32 00215 01 M S 08 19 Printed in Mexico ...

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