FULTON RM7895A Manual Download Page 8

RM7895A RELAY MODULE

32-00122-01

8

3.

For surface mounting, use the back of the subbase 
as a template to mark the four screw locations. Drill 
the pilot holes.

4.

Securely mount the subbase using four no. 6 screws.

Fig. 4. Internal block diagram of the RM7895 (see Fig. 6 for detailed wiring instructions). 

WIRING

IMPORTANT

For proper subbase wiring, refer to Fig. 5.

For proper remote wiring of the Keyboard Display 
Module, refer to the Specifications for the Key-
board Display Module (form 65-0144), Communi-
cations Interface  Base Unit (63-2278), Data 
ControlBus™ Module (65-0091) or Extension 
Cable Assembly 
(65-0131).

NOTE:

Part number 203541 5-Wire Connector (order 
separately) is required except when using the 
extension cable assembly.

WARNING

Electrical Shock Hazard.
Can cause severe injury, death or property 
damage.

Disconnect the power supply before beginning 
installation to prevent electrical shock or 
equipment and control damage. More than one 
power supply disconnect may be required.

1.

For proper remote wiring of the Keyboard Display 
Module, refer to the Specifications for the Keyboard 
Display Module (65-0144), Communication Inter-
face Base Unit (63-2278), Data ControlBus™ Module 
(65-0091) or Extension Cable Assembly (65-0131).

2.

Disconnect the power supply from the main discon-
nect before beginning installation to prevent electri-
cal shock and equipment damage. More than one 
disconnect may be involved.

3.

All wiring must comply with applicable electrical 
codes, ordinances and regulations. Wiring, where 
required, must comply with NEC Class 1 (Line Volt-
age) wiring.

4.

Recommended wire size and type: see Table 4.

5.

Recommended grounding practices: see Table 5.

6.

The Keyboard Display Module, Data ControlBus™ 
Module (for remote mounting or communications) 
or Communication Interface ControlBus Module 
must be wired in a daisy chain configuration, (1(a)-
1(a), 
2(b)-2(b), 3(c)-3(c)). The order of interconnection of 
all the devices listed above is not important. Be 
aware that modules on the closes and farthest end 
of the daisy chain configuration string require a 
120-ohm, 1/4 watt minimum, resistor termination 
across terminals 1 and 2 of the electrical connectors, 
for connections over 100 feet. Recommended wire 
routing of leadwires:

CONFIGURATION 

JUMPERS

MICROCOMPUTER

RESET 

PUSHBUTTON

RUN/TEST

SWITCH

STATUS LEDs

PLUG-IN PURGE 

TIMER CARD

SAFETY RELAY 

CIRCUIT

POWER SUPPLY

OPTIONAL KEYBOARD 

DISPLAY MODULE

PLUG-IN

FLAME

AMPLIFIER

RELAY

DRIVE 

CIRCUIT

CONTROL

POWER

TEST

JACK

REMOTE

RESET

DDL

DDL

COMMUNICATIONS

INDICATES FEEDBACK SENSING

TO RELAY STATUS FEEDBACK

AND LINE VOLT INPUTS

FIELD WIRING
INTERNAL WIRING

IGNITION

PILOT

MAIN VALVE

1K

RELAY

STATUS 

FEEDBACK

AND LINE

VOLTAGE

INPUTS

LIMITS

CONTROLLER

LOCKOUT

INTERLOCK

(INCLUDING 

AIRFLOW SWITCH)

1K1

2K1 5K1

FLAME SIGNAL

TEST

PROVIDE DISCONNECT MEANS AND 

OVERLOAD PROTECTION AS REQUIRED.

RS485

1

2

3

L1 

(HOT)

L2

5

6

7

4K1

2K2

10

8

9

7K

6K

5K

4K

3K

2K

F

G

22

1

BLOWER

6K1

4

ALARM

3K1

3

L2

M5110G

1

RM7895, RM7896: 120 VAC, 50/60 HZ.

EC7895A,C:  220-240 VAC, 50/60 HZ.

Summary of Contents for RM7895A

Page 1: ...c input check Dynamic safety relay test Dynamic self check logic Internal hardware status monitoring Tamper resistant timing and logic Access for external electrical voltage checks Application Flexibi...

Page 2: ...ing the current to blow the 15A fuse or breaker in event of an internal short circuit The RM7895 needs a low impedance ground connection to the equipment frame which in turn needs a low impedance conn...

Page 3: ...in Flame Signal Amplifier see Table 2 Plug in Purge Timer Cards selectable ST7800A two sec onds to 30 minutes Q7800A Wiring Subbase Accessories 203541 5 wire connector required when Keyboard Dis play...

Page 4: ...5 127 M3529 5 1 4 133 REMOVE ONLY FOR TERMINAL TEST ACCESS 1 1 BURNER CONTROL R MOUNTING FLANGE 1 2 14 NPSM LEADWIRES FACEPLATE 3 4 14 NPT M1962B 3 3 4 95 7 7 32 183 5 1 8 130 3 7 16 87 5 1 4 133 C701...

Page 5: ...terminal is not energized c No flame present at end of PFEP d Main valve terminal is energized e Internal system fault occurred f Purge card is removed g Purge card is bad 5 RUN PERIOD a No flame pres...

Page 6: ...and self checking detector are energized for the first 40 seconds during STANDBY and the last two seconds before exiting STANDBY If a flame exists a safety shutdown occurs A standard amplifier is ener...

Page 7: ...trol and the main fuel valve s 2 Two flame detectors can be connected in parallel 3 This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance wit...

Page 8: ...All wiring must comply with applicable electrical codes ordinances and regulations Wiring where required must comply with NEC Class 1 Line Volt age wiring 4 Recommended wire size and type see Table 4...

Page 9: ...quired for the RM7895 Add the required disconnect means and overload protection 2 Check all wiring circuits and complete the Static Checkout see Table 7 before installing the RM7895 on the subbase 3 I...

Page 10: ...lifier flame amplifier signal probes electrical signal voltage probes and electrical connections M3536B G L2 3 4 5 6 7 8 9 10 F L1 13 14 15 16 17 18 19 20 21 22 12 AIR FLOW INTERLOCK MASTER SWITCH IGN...

Page 11: ...Fig 8 2 Insert the two interlocking ears into the two mating slots and with a hinge action push on the upper corners of the Dust Cover to secure it to the RM7895 3 Be sure the Dust Cover is firmly in...

Page 12: ...ut Causes for hold conditions in the INITIATE sequence are AC line dropout is detected AC line frequency error caused by using a 60 Hz device on a 50 Hz line or vice versa devices with a date code pri...

Page 13: ...If 10 second PFEP is chosen main valve terminal 9 is turned on as soon as flame is sensed Ignition terminal 10 is de energized as soon as the main valve is energized The pilot valve remains energized...

Page 14: ...red correctly and that the external controllers limits interlocks actuators valves transformers motors and other devices are operating properly IMPORTANT Do not perform a dielectric test with the RM78...

Page 15: ...oltage at terminal 6 1 Limits 2 Burner controller 3 4 5 7 L2 1 Burner motor fan or blower starts 2 Line voltage at terminal 7 within 10 seconds 1 Burner motor circuit a Manual switch of burner motor b...

Page 16: ...the flame detector s in the FINAL position Equipment Recommended Volt ohmmeter 1 Mohm volt minimum sensitivity with 0 300 Vac capability 0 6000 ohm capability 0 10 Vdc capability Checkout Summary Pre...

Page 17: ...e rod make sure Ground area is large enough Flame rod is properly located in the flame Temperature at the flame rod insulator is no greater than 500 F 260 C 4 For all optical detectors clean the detec...

Page 18: ...16 10 If the main burner flame is not established within five seconds or the normal lightoff time specified by the equipment manufacturer close the manual main fuel shutoff valve s 11 Recycle the sys...

Page 19: ...ents for flame stability and input rating e Shut down the system by lowering the set point of the operating controller Make sure the burner flame goes out and all automatic fuel valves close Proceed t...

Page 20: ...cessary to construct a barrier to block the ignition spark from the detector view Continue adjustments until the flame signal due to ignition spark is less than 0 5 Vdc NOTE The Honeywell Q624A Solid...

Page 21: ...Troubleshooting manual form 65 0233 The RM7895 provides diagnostic information to aid the service mechanic to obtain information when troubleshooting the system see Table 8 The optional Keyboard Disp...

Page 22: ...STANDBY until the line voltage is at a sufficient level for proper operating parameters STANDBY The LED indicates the burner status POWER The burner can be placed in STANDBY by opening the burner swi...

Page 23: ...es shall be connected to the Burner Controller DDL line License agreement Copying and reverse engineering is prohibited by the law PURGE HOLD Airflow Interlock The LED indicates the burner status POWE...

Page 24: ...RM7895A RELAY MODULE U S Registered Trademark 2018 Honeywell International Inc 32 00122 01 M S Rev 08 18 Printed in United States...

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