R7824, R7847, R7848, R7849, R7851,
R7852, R7861, R7886 Amplifiers
for 7800 SERIES and R7140 Relay Modules
PRODUCT DATA
indicate the presence of flame when used with 7800 SERIES
and R7140 Relay Modules. This is not European Community
(CE) approved for EC7810, EC7820, EC/RM7830 or EC/
RM7850 Relay Modules.
The R7848A,B Infrared Flame Amplifiers are solid state plug-
in amplifiers that respond to an infrared signal from a C7015
Infrared Flame Detector to indicate the presence of flame
when used with 7800 SERIES and R7140 Relay Modules.
The R7849A,B Ultraviolet Flame Amplifiers are solid state
plug-in amplifiers that respond to an ultraviolet signal from a
C7027, C7035 or C7044 Ultraviolet Flame Detector to indicate
the presence of flame when used with 7800 SERIES and
R7140 Relay Modules.
The R7851B Optical Flame Amplifiers are solid state plug-in
amplifiers that respond to optical signals from C7927 and C7962
Flame Detectors to indicate the presence of flame when used
with 7800 SERIES and R7140 Relay Modules.
The R7852A,B Infrared Flame Amplifiers are solid state plug-
in amplifiers that respond to an infrared signal from a C7915
Infrared Flame Detector to indicate the presence of flame
when used with 7800 SERIES and R7140 Relay Modules.
APPLICATION
The R7824C Rectification Flame Amplifier is a solid state
plug-in amplifier that responds to a rectified signal from a
C7024E,F Self-Check Ultraviolet Flame Detector to indicate
the presence of flame when used with the 24 Vdc RM7824
Relay Module.
The R7851C Dynamic Self-Check Optical Flame Amplifier is a
solid state plug-in amplifier that responds to ultraviolet signals
from C7961E Dynamic Shutter-Check ultraviolet flame
detectors to indicate the presence of flame when used with
7800 SERIES and R7140 Relay Modules.
The R7847A,B Rectification Flame Amplifiers are solid state
plug-in amplifiers that respond to a rectified signal from a
rectification type flame detector to indicate the presence of
flame when used with 7800 SERIES and R7140 Relay Modules.
The R7861A Self-Check Ultraviolet Flame Amplifier is a solid
state plug-in amplifier that responds to an ultraviolet signal
from a C7061 Self-Check Ultraviolet Flame Detector to
indicate the presence of flame when used with 7800 SERIES
and R7140 Relay Modules.
The R7847C Self-Check Rectification Flame Amplifier is a
solid state plug-in amplifier that responds to a rectified signal
from a C7012E,F Self-Check Ultraviolet Flame Detector to
Contents
Ordering Information ........................................................
2
Amplifiers R7847B,C, R7861A,
R7886, R7851C or R7852B
SIL3
65-0109-14
Capable
R7824, R7847, R7848, R7849, R7851, R7852, R7861, R7886 AMPLIFIERS FOR 7800 SERIES AND R7140 RELAY MODULES
Infrared:
R7848A,B for use with C7015 Infrared (lead sulfide)
Canadian Standards Association Certified: LR95329-3.
Factory Mutual Approved: Report 1V9A0.AF. (R7851B, Report
Number 3011020, June 16, 2003), R7851C (Report number
Detector.
R7852A,B for use with C7915 Infrared (lead sulfide)
3020842, April 12, 2005.)
SwissRe (formerly Industrial Risk Insurers) Acceptable.
Detector.
Ultraviolet:
R7849A,B for use with C7027/C7035/C7044 Minipeeper
Table 1. Relay Module Flame Failure
Response Time (FFRT).
Ultraviolet Detectors.
R7861A for use with C7061A Ultraviolet Detector.
R7886A for use with C7076A,D Ultraviolet Detectors with
adjustable sensitivity.
Flame Failure Response
Time (FFRT) in seconds
Optical:
Relay Module
0.8 or 1
2.0 or 3.0
2.0
R7851B for use with C7927 and C7962 Flame Detectors.
R7851C for use with C7961E Flame Detectors.
EC7810, EC7820, EC/RM7830, 1.0
EC/RM7850
NOTE: R7824C, Series 2 or greater and R7847C Series 4 or
greater, pulse the shutter when signal of 1.5 Vac is
sensed. Display readings of 0.7 to 2.4 Vdc are com-
mon.
EC/RM7823, EC/RM7885, EC/ 0.8
RM7890, RM7895, RM7896,
RM7897, RM7898, RM7888,
RM7838, RM7800, RM7840,
R7140
3.0
3.0
Flame Failure Response Time: See Table 1.
RM7824
N/A
Flame Signal (Volts dc):
Minimum Acceptable: 1.25 Vdc.
Flame Signal Voltage Range (displayed on Keyboard Display
Module or measured with a 1M ohm/volt meter plugged into
amplifier test jacks): 0.0 to 5.0 Vdc.
–
+
S
FLAME AMPLIFIER
Environmental Ratings:
3
(76)
Ambient Temperature:
Operating: -40°F to 140°F (-40°C to 60°C).
Storage: -40°F to 150°F (-40°C to 65°C).
Humidity: Operating 85% rh continuous, noncondensing.
Vibration: Continuous 0.5G environment.
3/8 (9)
Weight: 2.5 oz (71g), unpacked.
Dimensions: See Fig. 1.
7/8
3-9/16 (91)
(23)
M11460
SIL 3 Capable:
Fig. 1. Flame amplifier dimensions in in. (mm).
The Amplifiers R7847B,C, R7861A, R7886, R7851C or
R7852B used with the appropriate flame detector and used in
Relay Module EC7810A, 20A, 30A, 40L, 50A;
RM7800[E,G,L,M], 30A, 38[A,B,C], 40[E,G,L,M] 50A,
90[A,B,C,D], 97[A,C], 98A is SIL 3 Capable in a properly
designed Safety Instrumented System. See form number 65-
0312 for Certificate Agreement.
NOTE: EN298 Approved: When these amplifiers are used
with an EC7810, EC7820, EC/RM7830, or
EC/RM7850 Relay Module.
Accessories:
Flame Simulators:
Rectification: 123514A.
Ultraviolet: 203659.
Flame Detectors (ordered separately): select from Table 2.
Approvals:
Underwriters Laboratories Inc. Listed: File no. MP268, Guide
no. MCCZZ: R7847A, R7847B, R7847C, R7861A, R7886A,
R7848A, R7848B, R7849A, R7849B, R7851B, R7851C.
Underwriters Laboratories Inc. Component Recognized: File
no. MP268, Guide no. MCCZZ: R7824C.
3
65-0109—14
R7824, R7847, R7848, R7849, R7851, R7852, R7861, R7886 AMPLIFIERS FOR 7800 SERIES AND R7140 RELAY MODULES
Table 2. Flame Detection Systems.
Plug-in Flame Signal Amplifiers
Applicable Flame Detectors
Flame
Failure
Response
a
Type
Color Self-Checking
Model
Time (sec)
Fuel
Type
Models
C7024E,F
b,c,h
Rectification Green Dymanic Self-
Check
3
Gas, oil, Ultraviolet (Purple
coal Peeper®)
R7824C
g
No
0.8/1 or 2/3 Gas
Rectifying Flame Rod C7004, C7007, C7011
R7847A
i
Complete Assemblies:
C7008, C7009, Q179
Holders
g
No
2/3
Gas, oil, Ultraviolet (Purple
C7012A,C.
R7847A
R7847B
coal
Peeper®)
d,g
Dynamic Ampli-
Check®
0.8/1 or
2/3
Gas
Rectifying Flame Rod C7004, C7007, C7011
i
Complete Assemblies:
C7008, C7009, Q179
Holders
d,g
c,h
Dynamic Ampli-
Check®
2/3
3
Gas, oil, Ultraviolet (Purple
coal Peeper®)
C7012A,C
C7012E,F
C7015
R7847B
Dynamic Self
Check
Gas, oil, Ultraviolet (Purple
coal Peeper®)
R7847C
Infrared
Red
No
R7848A
2/3
2/3
2/3
2/3
Gas, oil, Infrared (Lead
coal Sulfide)
d
b
Dynamic Ampli-
Check®
Gas, oil, Infrared (Lead
coal Sulfide)
C7015
R7848B
R7852A
Red/
White
No
Gas, oil, Infrared (Lead
coal Sulfide)
C7915
Dynamic Ampli-
Check®
Gas, oil, Infrared (Lead
coal Sulfide)
C7915
R7852B
R7849A
f
f
Ultraviolet Purple No
0.8/1 or
2/3
Gas, oil Ultraviolet
(Minipeeper)
C7027, C7035, C7044
d
Dynamic Ampli-
Check®
0.8/1 or
2/3
Gas, oil Ultraviolet
(Minipeeper)
R7849B
R7861A
R7886A
C7027, C7035, C7044
C7061
c,e
c,e
Dynamic Self-
Check
0.8/1 or
2/3
Gas, oil, Ultraviolet
coal
Blue
Dynamic Self-
Check
2/3
Gas, oil, Ultraviolet (Adjustable C7076
coal Sensitivity)
Optical
White Dymanic Ampli- R7851B
Check®
0.8/1 or 2/3 Gas, oil, Optical (UV, Visible
coal Light)
C7927, C7962
c
Dynamic Self-
Check
2/3
Gas, oil, Optical (UV only)
coal
C7961
R7851C
a
b
c
Flame Failure Response Time (FFRT) depends on selection of amplifier and 7800 SERIES and R7140 Relay Module.
R7824C is used only with the 24 Vdc RM7824 Relay Module and C7024E,F Flame Detectors.
Circuitry tests all electronic components in flame detection system (amplifier and detector) 12 times a minute during burner oper-
ation and shuts down burner if detection system fails.
d
e
Circuitry tests flame signal amplifier 12 times a minute during burner operation and shuts down burner if amplifier fails.
200/220/240 Vac applications require a 120 Vac, 10 VA minimum stepdown transformer (not provided) to drive the shutter. Applies
to R7886A series 2 or greater; R7861 series 1 or greater. Fig. 2 shows flame detector wiring.
f
Use C7027, C7035 and C7044 Flame Detectors only on burners that cycle on-off at least once every twenty-four hours. Use
C7061A Ultraviolet Detector with R7861A Amplifier or C7076A Flame Detector with R7886A Amplifier as ultraviolet flame detec-
tion system for appliances with burners that remain on continuously for twenty-four hours or longer.
g
h
R7847A,B Amplifiers with 0.8/1 second FFRT should NOT be used with C7012A,C Solid State Ultraviolet Detectors.
R7824C Series 2 and greater and R7847C Series 4 or greater, check flame detector system when flame reaches 1.5 Vdc or at
4.5 seconds, whichever occurs first.
NOTE: R7824C Series 2 or greater and R7847C Series 4 or greater, pulse the shutter when signal of 1.5 Vdc is sensed. Display
readings of 0.7 to 2.4 Vdc are common.
i
Order flame rod separately; see flame detector Instructions for holder.
65-0109—14
4
R7824, R7847, R7848, R7849, R7851, R7852, R7861, R7886 AMPLIFIERS FOR 7800 SERIES AND R7140 RELAY MODULES
1. Align the amplifier circuit board edge connector with the
keyed receptacle on the 7800 SERIES and R7140 Relay
Module. Be sure the amplifier nameplate faces away
from the Relay Module.
CAUTION
Incorrect combination of relay module, amplifier
and flame detector can cause equipment damage.
In infrared applications (C7015 Infrared Flame Detector
Equipment Damage Hazard.
2. Push in the amplifier until the circuit board is fully
inserted into the receptacle and then push the amplifier
toward the 7800 SERIES and R7140 Relay Module
and R7848 Amplifier) using the RM7890 Relay Module
retaining clasp.
with software version 4004 or less requires a ten-
second delay to start sequence. This applies only to the
initial power of the RM7890.
3. Be sure the amplifier is firmly in place.
4. Perform all required checkout tests.
Installing Flame Detector
INSTALLATION
NOTE: Table 2 lists flame detection systems available for use
with 7800 SERIES and R7140 Relay Modules. Be
sure to use the correct combination of amplifier and
flame detector.
When Installing this Product...
1. Read these instructions carefully. Failure to follow them
could damage the product or cause a hazardous condition.
2. Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
3. Installer must be a trained, experienced, flame safeguard
Proper flame detector installation is the basis of a safe and
reliable flame safeguard installation. Refer to the Instructions
packed with the flame detector and the equipment
manufacturer instructions.
control technician.
4. After installation is complete, check out the product oper-
Keep the flame signal leadwires as short as possible from the
flame detector to the wiring subbase. Capacitance increases
with leadwire length, reducing the signal strength. The
maximum permissible leadwire length depends on the type of
flame detector, leadwire and conduit. However, the ultimate
limiting factor for the flame detector leadwire is the flame
signal; see Table 3 in the Checkout section.
ation as provided in these instructions.
WARNING
Electric Shock Hazard.
Can cause electrical shock, serious injury or death.
Disconnect the power supply before beginning
installation. More than one power supply disconnection
can be involved.
IMPORTANT
1. Wiring must comply with all applicable codes, ordi-
nances and regulations
2. Wiring (where required) must comply with NEC Class
1 (Line Voltage) wiring.
3. Perform all required checkout tests after installation is
complete.
CAUTION
Equipment Damage Hazard.
Can cause equipment damage.
Disconnect 7800 SERIES and R7140 Relay Module
power before removing amplifier.
Fig. 2. Installing flame signal amplifier.
Installing Plug-In Flame
Signal Amplifier (Fig. 2)
Wiring
WARNING
Can cause severe injury, death or property damage.
Disconnect power supply before beginning installation.
More than one disconnection can be involved.
WARNING
Can cause severe injury, death or property damage.
Disconnect the power supply before beginning
installation. More than one power supply disconnection
can be involved.
Electrical Shock Hazard.
Electric Shock Hazard.
5. Remove the 7800 SERIES and R7140 Relay Module
from the wiring subbase.
6. Refer to Fig. 3 for proper flame detector wiring.
5
65-0109—14
R7824, R7847, R7848, R7849, R7851, R7852, R7861, R7886 AMPLIFIERS FOR 7800 SERIES AND R7140 RELAY MODULES
C7076A,D ULTRAVIOLET DETECTOR
FLAME ROD
X F
REMOTE
SENSOR
G
X
6
5
4
3
F
7
8
EARTH
3b
3a
2b
GROUND
G
2a
INFRARED (C7915)
SHUTTER
SHUTTER
L1
1
C7076A
OR
BLUE
F
C7076D
TERMINAL
BLOCK
L2
2
WHITE
G
L1 (HOT)
L2 (COMMON)
3
ULTRAVIOLET (C7027/C7035/C7044)
BLUE
F
7800 SERIES
5
1
WHITE
G
22
F
G
L2
OPTICAL C7927A
BLUE
F
SOLID STATE SELF-CHECKING
ULTRAVIOLET (C7012E,F)
1
WHITE
G
SOLID STATE
ULTRAVIOLET (C7012A,C, C7961E)
4
BLUE
YELLOW
WHITE
F
G
22
2
3
WHITE
BLACK
BLACK
L2
L1
L2
BLUE
YELLOW
F
2
G
BLACK
BLACK
GREEN
L1
L2
GND
SOLID STATE SELF-CHECKING
ULTRAVIOLET (C7024E,F – E SHOWN)
5
SELF-CHECKING ULTRAVIOLET (C7061A)
BLUE
F
BLUE
YELLOW
G
YELLOW
WHITE
2
G
F
2
22
WHITE
RED
BLACK
3
L2
WHITE
22
3
WHITE
N
L2
1
!
CAUTION: EQUIPMENT DAMAGE HAZARD. INCORRECT WIRING POLARITY CAN DAMAGE OR DESTROY UV SENSING TUBES.
CONNECT FLAME DETECTOR WIRES ACCORDING TO FOOTNOTES 1 AND 2 TO PREVENT UV SENSING TUBE DAMAGE.FLAME DETECTOR
LEADS ARE COLOR CODED. THE BLUE LEAD MUST BE CONNECTED TO THE F TERMINAL AND THE WHITE MUST BE CONNECTED TO
THE G TERMINAL. THE UV SENSING TUBE IS POLARITY SENSITIVE.
2
3
FLAME DETECTOR LEADS ARE COLOR CODED. THE BLUE LEAD MUST BE CONNECTED TO THE F TERMINAL AND THE YELLOW MUST
BE CONNECTED TO THE G TERMINAL. THE UV SENSING TUBE IS POLARITY SENSITIVE.
!
CAUTION: EQUIPMENT DAMAGE HAZARD. INCORRECT VOLTAGE CAN DAMAGE SHUTTER MECHANISM ONLY ON EC7800 SERIES
RELAY MODULES. INSTALL A 200/220/240 VAC TO 120 VAC, 10VA MINIMUM, STEPDOWN TRANSFORMER (NOT PROVIDED) TO DRIVE
THE SHUTTER MECHANISM.
4
5
DO NOT USE 0.8/1 SECOND FFRT AMPLIFIER WITH C7012A,C FLAME DETECTOR.
M27852
GND (GREEN) LEAD WIRE ON C7961E ONLY.
Fig. 3. Flame detector wiring.
65-0109—14
6
R7824, R7847, R7848, R7849, R7851, R7852, R7861, R7886 AMPLIFIERS FOR 7800 SERIES AND R7140 RELAY MODULES
7. Disconnect power supply before making wiring connec-
tions to prevent electrical shock and equipment damage.
8. All wiring must comply with appropriate electrical codes,
ordinances and regulations including NEC Class 1 (Line
Voltage) wiring where required.
9. Use recommended wire size and type no. 18 copper
CAUTION
Improper wiring can destroy ultraviolet sensing
Equipment Damage Hazard.
tube.
Carefully follow polarity sensitive wiring instructions for
the C7027, C7035, C7044, C7012, C7024, C7061,
C7961 and C7076. Reversing the leadwires, even
momentarily, can destroy the ultraviolet sensing tube.
conductors TTW(60C) or THW (75C) or THNN(90C).
10. Use recommended wire routing:
a. Keep the flame signal leadwire as short as possible
from the detector to the 7800 SERIES and R7140
Relay Module. The maximum permissible leadwire
length depends on the type of leadwire, conduit type
and leadwire diameter. The ultimate limiting factor for
flame signal leadwire length is the flame signal volt-
age.
POSITIVE (+)
METER LEAD
NEGATIVE (-)
METER LEAD
ONE
MEGOHM/VOLT
METER
b. Do not run high voltage ignition transformer wires in
the same conduit with the flame detection wiring.
c. If the flame detector leadwires are not long enough
to reach the 7800 SERIES and R7140 Relay Module
electrical connectors, make splices in a junction box.
(1) Enclose scanner wiring without armor cable in
metal cable or conduit.
FLAME SIMULATOR
TEST JACK
(2) Follow flame detector Instructions.
11. Check wiring, see Fig. 3.
12. Install 7800 SERIES and R7140 Relay Module.
13. Restore power to the 7800 SERIES and R7140 Relay
Module.
Flame detector wiring is shown in Fig. 3.
CHECKOUT
M11459A
Fig. 4. Flame signal measurement with meter.
1. Connect blue leadwire from detector to terminal F and
white leadwire from C7027/C7035/C7044/C7061 to ter-
minal G.
2. Connect blue leadwire from detector to terminal F and
yellow leadwire from C7012/C7024/C7961 to terminal G.
3. Follow lightoff Instructions for applicable 7800 SERIES
and R7140 Relay Module.
Preliminary Inspection
Make certain that:
1. Wiring connections are correct and all terminal screws
and electrical connections are tight.
2. Proper flame failure response time is selected.
3. Amplifier is securely mounted on the 7800 SERIES and
R7140 Relay Module.
4. Detectors are properly positioned and cleaned according
to Detector Instructions.
5. Correct combination of amplifier and flame detector is
Measuring Flame Signal With
Keyboard Display Module
used.
Consult Instructions for applicable 7800 SERIES and R7140
Relay Module or Keyboard Display Module.
Flame Signal Measurement (Fig. 4)
Flame signal can be measured at the Flame Signal Test Jacks,
see Fig. 4, and at the Keyboard Display Module. Measure the
flame signal at the appropriate times defined in the Checkout
section; see applicable 7800 SERIES and R7140 Relay
Module Instructions. See Table 3 for acceptable and maximum
flame signal voltage strengths.
Measuring Flame Signal with a Volt
Ohmmeter
Two test jacks, positive and negative (Com) are accessible on
the top of the amplifier when plugged into the 7800 SERIES
and R7140 Relay Module. These jacks are provided for
monitoring flame signal strength. Use a one megohm/volt
meter to measure the flame signal strength. Connect the
positive meter lead (red) to the positive (+) amplifier test jack
and the negative meter lead (black) to the negative (-) amplifier
test jack. The test jacks use standard 0.180 inch diameter
voltmeter probes. A minimum 1.25 Vdc flame signal is
required.
NOTE: The probes need to tip toward the relay module in
order to make electrical contact.
7
65-0109—14
R7824, R7847, R7848, R7849, R7851, R7852, R7861, R7886 AMPLIFIERS FOR 7800 SERIES AND R7140 RELAY MODULES
Table 3. Flame signal.
Minimum Acceptable
a
Flame Detector
Flame Rod
Flame Signal Amplifier
Steady dc Voltage
1.25 Vdc
Maximum Expected dc Voltage
b
5.0 Vdc at Keyboard Display Module
or on volt-ohmmeter.
R7847A,B
c
C7012A,C
C7015A
b
R7848A,B
d,e
C7024E,F
R7824C
b
C7027A
C7035A
C7044A
R7849A,B
b
C7927
C7962
R7851B
b
C7915
R7852A,B
d
C7061A
C7076A,D
C7961E
R7861A
d
R7886A
d
R7851C
a
This minimum or stronger signal can be easily obtained if the detector is correctly installed and positioned to properly sense the
flame. Obtain this voltage before completing checkout.
b
c
The flame amplifiers are Ampli-Check® type.
Adjust slightly, or face the pipe down, or extend the sight pipe on C7012A,C applications to obtain a maximum flame signal
reading less than 5.0 volts.
d
e
The flame signal amplifier circuitry is tested one-half second every five seconds during burner operation and shuts down the
burner if the amplifier fails (all installations).
R7824C Series 2 or greater and R7847C Series 4 or greater, pulse the shutter when the flame signal reaches 1.5 Vdc.
NOTE: R7824C, Series 2 or greater, pulse shutter when sig-
nal of 1.5 Vdc is sensed. Display readings of 0.7 to
2.4 Vdc are common.
c. Temperature at the flame rod insulator is no greater
than 500°F (260°C).
4. For all optical detectors, clean the detector viewing
window, lens, and inside of the sight pipe as applicable.
5. With the burner running, check the temperature at the
detector. If it exceeds the detector maximum rated
temperature:
The flame signal for the pilot alone, the main burner flame
alone, and both together must be steady and a minimum of
1.25V. If the flame signal is unsteady, or less than the
minimum acceptable voltage, check the flame detector
installation and circuitry in the following procedure.
a. Add a heat block to stop conducted heat traveling
up the sight pipe.
b. Add a shield or screen to reflect radiated heat.
c. Add cooling (refer to sight pipe ventilation in the
detector Instructions).
1. Check the supply voltages at terminals (L1) and L2 (N).
Make sure the master switch is closed, connections are
correct, and the power supply is of the correct voltage
and frequency and is sinusoidal.
2. Check the detector wiring for defects including:
a. Incorrect connections.
6. Make sure that the flame adjustment is not too lean.
7. Make sure the optical detector is properly sighting the
flame.
8. If necessary, resight or reposition the detector.
9. If you cannot obtain proper operation, replace the
plug-in amplifier.
b. Wrong type of wire.
c. Deteriorated wire.
d. Open circuits.
e. Short circuits.
f. Leakage paths caused by moisture, soot or accu-
mulated dirt.
10. If you cannot yet obtain proper operation, replace the
flame detector.
IMPORTANT
3. For a flame rod, make sure:
If you make any changes to the flame detection
system, repeat all required Checkout tests in
Checkout section of the Instructions for the
applicable 7800 SERIES and R7140 Relay Module.
a. There is enough ground area.
b. The flame rod is properly located in the flame.
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
® U.S. Registered Trademark
© 2011 Honeywell International Inc.
65-0109—14 M.S. Rev. 06-11
Printed in U.S.A.
Golden Valley, MN 55422
customer.honeywell.com
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