manualshive.com logo in svg

Honeywell RM7895 Series, Installation Instructions Manual, Page: 27 / 28

Share
Download
Honeywell RM7895 Series Installation Instructions Manual Download Page 27

RM7890, RM7895 100 Vac

Table 14. Sequence and Status Hold Information. (Continued)

Sequence

Information

PILOT IGN

The LED indicates the burner status, POWER, PILOT, and FLAME, which is the period of time the 

relay module permits the pilot valve and ignition to be energized and the pilot flame to be 

established.

MAIN IGN 

(RM7895 Only)

The LED indicates the burner status, POWER, PILOT, FLAME, and MAIN, which is the period of 

time the RM7895 permits the main valve to be open and the main flame to be tested.

RUN

The LED indicates the burner status, POWER, PILOT, FLAME and MAIN, which is the period of 

time after the Ignition Trials and before the operating controller setpoint is reached. During this 

time, the burner is firing under the control of the operating controller.

RESET/ALARM TEST

The LED indicates the burner status, POWER and ALARM. This condition indicates that the reset 

pushbutton is pressed. If it is held for more than four seconds, the alarm output is energized. The 

alarm 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 access allowed only to approved and trained person-

nel. Also, it is strongly advised to keep all the wiring of device 

physically secure.
Physical protection of the device is applied via Run/Test 

switch label/seal. It is intended to prevent and detect unau-

thorized access.

Modbus & DDL Interface security

Any conducts critical to device functionality (DDL, Modbus 

lines etc.) shall be physically protected (installed outside pub-

lic 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 security fea-

tures. For DDL interface - only DDL devices shall be connect-

ed to the Burner Controller DDL line.

License agreement

Copying and reverse engineering is prohibited by the law.

 

27 

32-00216-01

Summary of Contents for RM7895 Series

Page 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 ...

Page 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...

Page 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...

Page 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...

Page 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 ...

Page 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...

Page 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...

Page 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...

Page 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 ...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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 ...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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 ...

Page 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...

Page 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 ...

Reviews:

No comments