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RM7890, RM7895 100 Vac

50023821-001 2-Line Keyboard Display Module Cover, 

NEMA 4, clear
50023821-002 2-Line Keyboard Display Module Cover, 

NEMA 4, clear with reset button
205321B Flush Display Mounting Kit. Display Module Cover 

for 4-line LCD: 204729A w/o reset button, 204729C with 

reset button
221818A Extension Cable, display, 5 ft (1.52 m)
221818C Extension Cable, display, 10 ft (3.05 m)
123514A Rectification Flame Simulator
203569 Ultraviolet Flame Simulator

IMPORTANT

A flame detection system is required for operation and must 

be ordered separately. Select the applicable flame signal 

amplifier and matching flame detector from Table 5.

Table 2. RM7890, RM7895 Terminal Ratings.

Terminal No. 

Description

Ratings

G

Flame Sensor Ground

a

—

Earth G

Earth Ground

a

—

L2(N)

Line Voltage Common

—

3 (RM7890)

Line Voltage Supply (L1)

100 Vac (+10%/-15%), 50/60 Hz 

(±10%).

b

3 (RM7895)

Alarm

100 Vac, 1A pilot duty.

4 (RM7890)

Alarm

100 Vac, 1A pilot duty.

4 (RM7895)

Burner Motor

100 Vac, 9.8AFL, 58.8ALR (inrush).

5 (RM7890)

Unused

—

5 (RM7895)

Line Voltage Supply (L1)

100 Vac (+10%/-15%), 50/60 Hz 

(±10%).

b

6 (RM7890)

Burner Controller and Limits

100 Vac 8A Run, 43A inrush.

b

6 (RM7895)

Burner Controller and Limits

100 Vac, 1 mA.

7 (RM7890)

Unused

—

7 (RM7895)

Airflow Interlock

100 Vac, 8A run, 43A inrush.

8

Pilot Valve/Ignition

100 Vac.

c

9

Main Fuel Valve

10

Ignition

F(11)

Flame Sensor

60–220 Vac, current limited.

12 to 22

Unused

—

a

   The RM7890 and RM7895 must have an earth ground providing a connection between the wiring subbase and the control panel or 

equipment. The earth ground wire must be capable of conducting the current to blow a 15A Fast Blow, Type SC, fuse (or equivalent) in the 

event of an internal short circuit. The RM7890 and RM7895 need a low impedance ground connection to the equipment frame, which, in turn, 

needs a low impedance connection to earth ground.

b

   2000 VA maximum connected load to the Relay Module.

c

   See Table 3 and 4.

 

3 

32-00216-01

Содержание RM7895 Series

Страница 1: ...ument provides installation and static checkout in structions Other applicable publications are Table 1 Other applicable publications Form number Description 65 0249 S7810M Modbus Module 65 0084 Q7800A B 22 Terminal Wiring Subbase Product Data 65 0090 S7800A 2 line VFD Keyboard Display Module Product Data 65 0091 S7810A Data ControlBus Module Product Data 65 0095 S7820 Remote Reset Module Product ...

Страница 2: ...d optional Keyboard Display Module Status of configuration jumpers SPECIFICATIONS Electrical Ratings See Table 2 Voltage and Frequency 100 Vac 10 15 50 60 Hz 10 Power Dissipation 10W maximum Maximum Total Connected Load 2000 VA Fusing Total Connected Load 15A maximum type SC or equivalent Environmental Ratings Ambient Temperature Operating 40 F to 140 F 40 C to 60 C Storage 60 F to 150 F 51 C to 6...

Страница 3: ...M7895 Alarm 100 Vac 1A pilot duty 4 RM7890 Alarm 100 Vac 1A pilot duty 4 RM7895 Burner Motor 100 Vac 9 8AFL 58 8ALR inrush 5 RM7890 Unused 5 RM7895 Line Voltage Supply L1 100 Vac 10 15 50 60 Hz 10 b 6 RM7890 Burner Controller and Limits 100 Vac 8A Run 43A inrush b 6 RM7895 Burner Controller and Limits 100 Vac 1 mA 7 RM7890 Unused 7 RM7895 Airflow Interlock 100 Vac 8A run 43A inrush 8 Pilot Valve I...

Страница 4: ...ch Combination A B C D F 4 5A ignition 50 VA Pilot Duty plus 4 5A ignition 180 VA ignition plus motor valves with 660 VA inrush 360 VA open 250 VA hold 2A Pilot Duty 65 VA Pilot Duty plus Motor valves with 3850 VA inrush 700 VA open 250 VA hold Fig 1 Mounting dimensions of RM7890 RM7895 Relay Module and Q7800A Subbase in in mm Fig 2 Mounting dimensions of RM7890 RM7895 Relay Module and Q7800B Subb...

Страница 5: ... Dynamic Self Check R7886A Mb 3 0 sec Gas oil coal Ultraviolet Adjustable Sensitivity C7076 Optical White Dynamic Ampli Check R7851B 0 8 or 3 0 sec Gas oil coal Optical UV Visible Light C7927 C7962 Dynamic Self Check R7851Cb 3 0 sec Gas oil coal Optical UV only C7961 a Flame Failure Response Time FFRT depends on selection of amplifier b Circuitry tests all electronic components in flame detection ...

Страница 6: ...Internal system fault occurred c Main valve terminal is energized when it should be off d No flame present at end of PFEP e Airflow lockout feature is enabled and the airflow switch opens RM7895 f Purge card is not installed or was removed RM7895 only g Purge card is faulty RM7895 only 6 RUN PERIOD a Ignition terminal is energized when it should be off b Internal system fault occurred c Main valve...

Страница 7: ...r information during normal operation or when a safety shutdown or hold occurs First out Annunciation reports the cause of safety shutdown or identifies the cause of a failure to start or continue the burner control sequence with text and numbered code using the optional KDM It monitors all field input circuits including the flame signal amplifier Self Diagnostics add to the First Out Annunciation...

Страница 8: ...c trical separation using insulation at least equivalent to double or reinforced insulation This can be accomplished by either 1 Optically isolating the communication and or remote reset lines from the control cabinet 2 Providing physical separation from the communication and or remote reset lines using electrical conduit and a 204718A Remote Display Cover Assembly or other suitable enclosure that...

Страница 9: ...t the subbase using four no 6 screws not provided NOTE You might receive and error code 101 via KDM check the screws securing the relay to the subbase to check if they are not tight enough re tighten to insure there is no gap between the relay and the subbase Fig 4 Internal block diagram of the RM7890 see Fig 6 for detailed wiring instructions 9 32 00216 01 ...

Страница 10: ... refer to the Specifi cations for the 2 line VFD KDM 65 0090 the 4 line LCD KDM 32 00110 Network Data ControlBus Module 65 0091 or Extension Cable Assembly 65 0131 3 Disconnect the power supply from the main disconnect before beginning installation to prevent electrical shock and equipment damage More than one disconnect may be required 4 All wiring must comply with all applicable electrical codes...

Страница 11: ...r equivalent Remote Reset Module 22 AWG two wire twisted pair insulated for low voltage Modbus 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 TTW60C THW75C THHN90C The KDM and for remote mounting or communications Data ControlBus Mod...

Страница 12: ...path are free of nonconductive coatings and protected against corrosion on mating surfaces Signal ground KDM Data ControlBus Module Modbus Module Connect the shield at both ends of the daisy chain to earth ground 7 Recommended wire routing a For flame detector leadwires 1 Do not run high voltage ignition transformer wires in the same conduit with the flame detection wiring 2 Do not run scanner wir...

Страница 13: ...dule dust cover flame amplifier flame amplifier signal voltage probes electrical signal volt age probes and electrical connections a Allow an additional two inches 51 mm below the relay module for the flame amplifier mounting b Allow an optional three inch 76 mm minimum to both sides of the relay module for electrical signal voltage probes 3 Make sure subbase wiring does not project beyond the ter...

Страница 14: ...etector to the wiring subbase Capacitance increas es with leadwire length reducing the signal strength The maximum permissible leadwire length depends on the type of flame detector leadwire and conduit The ultimate limiting factor in the flame detector leadwire is the flame signal See Table 10 Fig 8 Electrical panel installation Fig 9 Wall or burner installation Fig 10 Dust cover mounting Fig 11 S...

Страница 15: ... sequence if the relay module verifies voltage fluctuations of 10 15 or fre quency fluctuations of 10 during any part of the operating sequence The INITIATE sequence lasts for ten seconds un less the voltage or frequency tolerances are not met When the tolerances are not met a hold condition is initiated and displayed on the optional KDM for at least five seconds When the tolerances are met the IN...

Страница 16: ...nds into PREPURGE or within the specified purge card timing oth erwise a recycle to the beginning of PREPURGE or lockout occurs depending on how the airflow switch selectable jumper is configured Ignition Trials Pilot Flame Establishing Period PFEP 1 The pilot valve and ignition transformer terminals 8 and 10 are energized The relay module has an intermittent pi lot valve terminal 8 2 Flame must b...

Страница 17: ...lightning and high current protection Equipment Recommended 1 Voltmeter one megohm volt minimum sensitivity set on the 0 to 300 Vac scale 2 Two jumper wires no 14 wire insulated 12 in 305 mm long with insulated alligator clips at both ends An ammeter can replace one of the jumper wires when checking operation of terminals 8 9 or 10 Verify amp draw to the device nameplate General Instructions 1 Per...

Страница 18: ...Ignition spark if ignition transformer is connected to terminal 8 Automatic pilot valve opens if connected to terminal 8 Refer to wiring diagram of system being tested 1 Watch for spark or listen for buzz a Ignition electrodes are clean b Ignition transformer is okay 2 List for click or feel head of valve for acti vation a Actuator if used b Pilot valve 5 3 to 9a Automatic fuel valve s opens If us...

Страница 19: ...or spark or listen for buzz a Ignition electrodes are clean b Ignition transformer is okay 2 List for click or feel head of valve for acti vation a Actuator if used b Pilot valve 6 5 to 9a Automatic fuel valve s opens If using direct spark ignition check the first stage fuel valve s instead of the pilot valve 3 Same as test number 5 If using direct spark ignition check the first stage fuel valve s...

Страница 20: ...a pilot 6 Hot refractory hold in test all installations 7 Ignition interference test all installations using flame rods 8 Flame signal with hot combustion chamber all installa tions 9 Safety shutdown tests all installations See Fig 14 for location of component parts and see Fig 5 or 6 or Q7800 Specifications form 65 0084 for terminal locations Preliminary Inspection When performing the following i...

Страница 21: ...ream from the burner inlet or disconnect power from the auto matic main fuel valve s 4 Close the master switch and start the system with a call for heat by raising the setpoint of the operating controller see Fig 15 or the relay module sequence The sequence should start the ten second INITIATE sequence 5 Let the sequence advance through STANDBY and SAFE START CHECK PREPURGE in the RM7895 Ignition ...

Страница 22: ...l operation 23 Make sure all readings are in the required ranges before proceeding NOTE Upon completing these tests open the master switch and remove all test jumpers from the subbase termi nals limits controls or switches Initial Lightoff Check for Direct Spark Ignition DSI Use this check for gas and oil burners that do not use a pilot immediately following the preliminary inspection Refer to the...

Страница 23: ... relay module will lock out a If the Flame Failure Action jumper see Table 6 or 7 JR2 is not clipped allow the RM7890 to recycle to PILOT IG NITION or the RM7895 to recycle through PREPURGE If the Flame Failure Action jumper is clipped push the reset pushbutton and allow the RM7890D to recycle to PILOT IGNITION or the RM7895E F to recycle through PREPURGE b As the control attempts to relight the p...

Страница 24: ...pi lot cannot ignite e Safety shutdown will occur 5 Observe loss of flame during RUN if Flame Failure Action configuration jumper JR2 is selected for Lockout see Ta bles 6 and 7 a Open the main fuel manual shutoff valve s and open the manual pilot shutoff valve s b Depress the reset pushbutton c Start the system Startup should be normal and the main burner should light normally d After the sequenc...

Страница 25: ...the actual status of the terminal If voltage is detected at the terminal 1 is displayed but if volt age is not present at the terminal 0 is displayed Historical Information Index The relay module has nonvolatile memory that allows it to retain historical information for the six most recent lockouts Each of the six lockout files retains the cycle when the fault occurred the hour of operation when t...

Страница 26: ...roper value INITIATE HOLD Low Line Voltage The LED indicates the burner status POWER and that low line voltage has occurred The burner sequence will not advance into 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 switch or if the operating controller ...

Страница 27: ...output will be de energized after the reset pushbutton is released SAFETY AND SECURITY Physical device protection Device shall be accessible to authorized personnel only In stallation on publicly accessible places is not recommended as this could lead to unwanted and potentially unsafe chang es to device wiring configuration etc It is recommended to lock the device in an enclosed cabinet with acce...

Страница 28: ...nd 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 com U S Registered Trademark 2019 Honeywell International Inc 32 00216 01 Edition 08 19 Printed in United States ...

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