Fireye SB Series User manual

© 2021 Carrier 1
WARNING: Selection of this control for a particular application should be made by a com
-
petent professional, licensed by a state or other government. Inappropriate application of this
product could result in an unsafe condition hazardous to life and property.
DESCRIPTION
The Fireye SBSeries Flame Safeguard Control is a compact, microprocessor based, modular burner
management system designed to provide automatic ignition and continuous flame monitoring for com-
mercial sizes of heating and process equipment firing any type of fuel.
The SBSeries are tested to EN298.
The control unit includes all the necessary digital logic and analog measuring circuitry to control the
sequence and monitor the flame of single gas, oil or combination gas/oil burners. Three available control
sequences are no-purge, purge, and modulation (air damper control). The part number specifies the
various features such as the flame sensor type, no purge, purge, modulation, proof of air opening at
start, and timings; thus the designer has control and protection against field tampering of critical
sequences.
LED indicators are available on the front of the unit that provide current operating status of the burner
system including lockout alarm. A test jack is recessed into the front cover that provides real time
reading of the connected flame sensor. This same test jack is also used to connect to an alpha-numeric
display, SB20896. A push button provides reset from lockout condition as well as placing the unit in a
check condition usable for pilot turn down test.
The SBSeries flame safeguard control family are of plug-in design and available in models that operate
at 120 VAC, 50/60 Hz and 230 VAC, 50/60 Hz making them universally acceptable.
*The wiring base provides a convenient means for connecting field wiring from the burner and valve
system to the control unit. There are three styles of bases: an internal terminal base that provides a
guarded wiring compartment; an external terminal base for use within a protective control panel; and
an expanded external terminal base for use with the modulation sequence control units.
Sensors that may be used with the SBSeries include flame rod (rectified ionization), ultra-violet (UV)
scanners, and self-checking UV scanners for continuous operation. Four types of non self-checking UV
scanners meet the demands of various environmental conditions.
SB-2501
June14,2021
FLAME SAFEGUARD
CONTROLS

2 © 2021 Carrier
WARNING: This equipment generates and can radiate radio frequency energy, and if not
installed and used in accordance with the instruction manual may cause interference to radio
communications. It has been tested and found to comply with the limits for a Class A
computing device pursuant to Subpart J of part 15 of FCC Rules, which are designed to pro-
vide reasonable protection against such interference when operated in a commercial envi-
ronment. Operation of this equipment in a residential area is likely to cause interference
SBSeries SPECIFICATIONS
Power Supply:
120VAC (min. 102, max 132) 50/60 Hz.
230 VAC (min 196, max 253) 50/60 Hz.
Power Consumption: 12VA (internal consumption, excludes externally connected loads)
Shipping Weight (Approx): 3 lbs (1.4 kg)
AMBIENT TEMPERATURE LIMITS
Maximum Minimum Weight
SBSeries 140°F 60°C -40°F -40°C 3 lbs (1.4kg)
UV Scanner, straight; SB49600-91 257°F 125°C -4° F -20° C 1 lb (.45kg)
UV Scanner, 90 degree; SB49600-91 140°F 60°C -4° F -20° C 1 lb (.45kg)
UV Scanner, sealed, NEMA4, SB20898 257°F 125°C -4° F -20° C 1 lb (.45kg)
UV Scanner, self-check; SB49602-91 140°F 60°C -4° F -20° C 7 lbs (3.2kg)
Flame Rod (Tip 2460 F); 69ND1-1000K4,
-
1000K6,
-
1000K8
1500°F 616°C -40°F -40°C 1 lb (.45kg)
Remote Display, 120 VAC; SB20896 22°F 50°F 32°F 0°C 1 lb (.45kg)
LOAD RATINGS
Function Terminal Inductive Load
The maximum total connected load
cannot exceed 15 Amps.
Gas Valves 3, 5 175 VA
Ignition 4 375 VA
Motor or Contactor 8 470 VA
Control A, 10, 11, 12, 13 175 VA
CAUTION: Published load ratings assume that no control be required to handle inrush cur
-
rent more often than once in 15 seconds. The use of control switches, solenoids, relays, etc.
which chatter will lead to premature failure. It is important to run through a test operation
(with fuel shut off) following the tripping of a circuit breaker, a blown fuse, or any instance of
chattering of any external current consuming devices.
WARNING: Selection of progra
m
mer andamplifier type
for a particular application should be
made by a competent professional, such as a Boiler/Burner technician licensed by a state or
government agency, engineering personnel of the burner, boiler or furnace manufacturer
(OEM) or in the performance of duties
based on the information from the OEM.

© 2021 Carrier 3
Flame Safeguard Controls
Eclipse Part
Fireye Part
Description



VF560222AA SB560222AA 120 VAC, 5/10 sec tfi, selectable purge, UV amp, pre-purge
air check, reset on power
VF560222AB SB560222AB 120 VAC, 5/10 sec tfi, selectable purge, UV amp, pre-purge
air check, manual reset
VF560222XA SB560222XA 120 VAC, 5/10 sec tfi, selectable purge, UV amp, sequence
hold, reset on power
VF560222XB SB560222XB 120 VAC, 5/10 sec tfi, selectable purge, UV amp, sequence
hold, manual reset
VF560223AA SB560223AA 120 VAC, 5/10 sec tfi, selectable purge, FR amp, pre-purge
air check, reset on power
VF560223AB SB560223AB 120 VAC, 5/10 sec tfi, selectable purge, FR amp, pre-purge
air check, manual reset
VF560223XA SB560223XA 120 VAC, 5/10 sec tfi, selectable purge, FR amp, sequence
hold, reset on power
VF560223XB SB560223XB 120 VAC, 5/10 sec tfi, selectable purge, FR amp, sequence
hold, manual reset
VF560232AA SB560232AA 120 VAC, 5/10 sec tfi, selectable purge, FR amp,
sequence hold, manual reset
VF560232AB SB560232AB 120 VAC, 5/10 sec tfi, no purge,
UV amp, manual reset
VF560232XA SB560232XA 120 VAC, 5/10 sec tfi, no purge, UV amp, sequence hold,
reset on power
VF560232XB SB560232XB 120 VAC, 5/10 sec tfi, no purge, UV amp, sequence hold,
manual reset
VF560233AA SB560233AA 120 VAC, 5/10 sec tfi, no purge, FR amp, reset on power
VF560233AB SB560233AB 120 VAC, 5/10 sec tfi, no purge, FR amp, manual reset
VF560233XA SB560233XA 120 VAC, 5/10 sec tfi, no purge, FR amp, sequence hold,
reset on power
VF560233XB SB560233XB 120 VAC, 5/10 sec tfi, no purge, FR amp, sequence hold,
manual reset
VF560242AA SB560242AA 120 VAC, 5/10 sec tfi, modulation, UV amp, reset on
power
VF560242AB SB560242AB 120 VAC, 5/10 sec tfi, modulation, UV amp, pre-purge air
check, manual reset
VF560242XA SB560242XA 120 VAC, 5/10 sec tfi, modulation, UV amp, sequence
hold, reset on power

4 © 2021 Carrier
Flame Safeguard Controls
Eclipse Part Number Eclipse Part Number Description
VF560242XB SB560242XB 120 VAC, 5/10 sec tfi, modulation, UV amp,
sequence hold, manual reset
VF560243AA SB560243AA 120 VAC, 5/10 sec tfi, modulation, FR amp, pre-
purge air check, reset on power
VF560243AB SB560243AB 120 VAC, 5/10 sec tfi, modulation, FR amp, pre-
purge air check, manual reset
VF560243XA SB560243XA 120 VAC, 5/10 sec tfi, modulation, FR amp,
sequence hold, reset on power
VF560243XB SB560243XB 120 VAC, 5/10 sec tfi, modulation, FR amp,
sequence hold, manual reset
VF560322AA SB560322AA 240 VAC, 5/10 sec tfi, selectable purge, UV amp,
pre-purge air check, reset on power
VF560322AB SB560322AB 240 VAC, 5/10 sec tfi, selectable purge, UV amp,
pre-purge air check, manual reset
VF560322XA SB560322XA 240 VAC, 5/10 sec tfi, selectable purge, UV amp,
sequence hold, reset on power
VF560322XB SB560322XB 240 VAC, 5/10 sec tfi, selectable purge, UV amp,
sequence hold, manual reset
VF560323AA SB560323AA 240 VAC, 5/10 sec tfi, selectable purge, UV amp,
sequence hold, manual reset
VF 560323AB SB560323AB 240 VAC, 5/10 sec tfi, selectable purge, FR amp,
pre-purge air check, manual reset
VF560323XA SB560323XA 240 VAC, 5/10 sec tfi, selectable purge, FR amp,
sequence hold, reset on power
VF560323XB SB560323XB 240 VAC, 5/10 sec tfi, selectable purge, FR amp,
sequence hold, manual reset
VF560332AA SB560332AA 240 VAC, 5/10 sec tfi, no purge, UV amp, reset on
power
VF 560332AB SB560332AB 240 VAC, 5/10 sec tfi, no purge, UV amp, manual
reset

© 2021 Carrier 5
Flame Safeguard Controls
Eclipse Part Number Eclipse Part Number Description
VF560332XA SB560332XA 240 VAC, 5/10 sec tfi, no purge, UV amp,
sequence hold, reset on power
VF560332XB SB560332XB 240 VAC, 5/10 sec tfi, no purge, UV amp,
sequence hold, manual reset
VF560333AA SB560333AA 240 VAC, 5/10 sec tfi, no purge, FR amp, reset on
power
VF 560333 AB SB560333AB 240 VAC, 5/10 sec tfi, no purge, FR amp, manual
reset
VF560333XA SB560333XA 240 VAC, 5/10 sec tfi, no purge, FR amp,
sequence hold, reset on power
VF560333XB SB560333XB 240 VAC, 5/10 sec tfi, no purge, FR amp,
sequence hold, manual reset
VF560342AA SB560342AA 240 VAC, 5/10 sec tfi, modulation, UV amp, pre-
purge air check, reset on power
VF 560342 AB SB560342AB 240 VAC, 5/10 sec tfi, modulation, UV amp, pre-
purge air check, manual reset
VF560342XA SB560342XA 240 VAC, 5/10 sec tfi, modulation, UV amp,
sequence hold, reset on power
VF560342XB SB560342XB 240 VAC, 5/10 sec tfi, modulation, UV amp,
sequence hold, manual reset
VF560343AA SB560343AA 240 VAC, 5/10 sec tfi, modulation, FR amp, pre-
purge air check, reset on power
VF560343 AB SB560343AB 240 VAC, 5/10 sec tfi, modulation, FR amp, pre-
purge air check, manual reset
VF560343XA SB560343XA 240 VAC, 5/10 sec tfi, modulation, FR amp,
sequence hold, reset on power
VF560343XB SB560343XB 240 VAC, 5/10 sec tfi, modulation, FR amp,
sequence hold, manual reset
VF560522AA SB560522AA 120 VAC, 10/15 sec tfi, selectable purge, UV amp,
pre-purge air check, reset on power
VF560522AB SB560522AB 120 VAC, 10/15 sec tfi, selectable purge, UV amp,
pre-purge air check, manual reset
VF560522XA SB560522XA 120 VAC, 10/15 sec tfi, selectable purge, UV amp,
sequence hold, reset on power

6 © 2021 Carrier
Flame Safeguard Controls
Eclipse Part Number Eclipse Part Number Description
VF560522XB SB560522XB 120 VAC, 5/10 sec tfi, selectable purge, UV amp,
sequence hold, manual reset
VF560523AA SB560523AA 120 VAC, 10/15 sec tfi, selectable purge, FR amp,
pre-purge air check, reset on power
VF560523AB SB560523AB 120 VAC, 10/15 sec tfi, selectable purge, FR amp,
pre-purge air check, manual reset
VF560523XA SB560523XA 120 VAC, 10/15 sec tfi, selectable purge, FR amp,
sequence hold, reset on power
VF560523XB SB560523XB 120 VAC, 10/15 sec tfi, selectable purge, FR amp,
sequence hold, manual reset
VF560532AA SB560532AA 120 VAC, 10/15 sec tfi, no purge, UV amp, reset
on power
VF560532AB
SB560532AB
120 VAC, 10/15 sec tfi, no purge,
UV amp, manual
reset
VF560532XA SB560532XA 120 VAC, 10/15 sec tfi, no purge, UV amp,
sequence hold, reset on power
VF560532XB SB560532XB 120 VAC, 10/15 sec tfi, no purge, UV amp,
sequence hold, manual reset
VF560533AA SB560533AA 120 VAC, 10/15 sec tfi, no purge, FR amp, reset
on power
VF560533AB SB560533AB 120 VAC, 10/15 sec tfi, no purge, FR amp, manual
reset
VF560533XA SB560533XA 120 VAC, 10/15 sec tfi, no purge, FR amp,
sequence hold, reset on power
VF560533XB SB560533XB 120 VAC, 10/15 sec tfi, no purge, FR amp,
sequence hold, manual reset

© 2021 Carrier 7
Flame Scanners and Accessories
Eclipse Part
Number Fireye Part Number Description
20898 SB20898 NEMA 4 UV SCANNER (ECLIPSE)
49600-90 SB49600-90 90 DEGREE UV SCANNER
49600-91 SB49600-91 STRAIGHT UV SCANNER (ECLIPSE)
49600-98 SB49600-98 MAGNIFYING LENS ASSY (ECLIPSE)
49602-91 SB49602-91 SELF-CHECK SCANNER (ECLIPSE)
49600
-
98
SB49600
-
98
MAGNIFYING LENS ASSY
(ECLIPSE)
49099
SB49099
COUPLING INSUL, 1/2" FNPT
Wiring Bases
Fireye Part Number Description
22194 SB22194 INTERNAL TERMINAL BASE, PL
22195 SB22195 WIRING BASE, PLASTIC, EXPO
49602
-
40
SB49602
-
40
MODULATION BASE (ECLIPSE)
Displays

20896
SB20896
REMOTE DISPLAY, 120V W/KEYPAD
20318
SB20318
CABLE FOR REMOTE DISPLAY
  

8 © 2021 Carrier
DIMENSIONS
FIGURE 1. SBSeries Control Unit, all model
FIGURE 2. SBSeries Bases, NO-PURGE and PURGE sequence models
¨
P/N: SB22194 P/N: SB22195

© 2021 Carrier 9
FIGURE 3. SBSeries MODULATION sequence model, SB49602-40
FIGURE 4. Remote Display SB20896
FLAME SCANNERS
CAUTION: The SB49600-91 and SB49600-90 ultra-violet flame scanners and associated
amplifier modules are non self-checking UV systems and should be applied only to burners that cycle
often (e.g. a minimum of once per 12 hours) in order for the safety checking circuit to be exercised.
WARNING: Installer must be trained and qualified. Follow the burner manufacturer’s instructions,
if supplied. Otherwise, proceed as follows.
1-9/16"
(40mm)
1
2 3 4 5 6 7 8 A D S 2S 11 011 12 13
3/8" (10mm) 3/16" (5mm)
8-3/8"(213mm)
FIREYE Inc.
¨
4-9/16"
116mm
15/16"
(24mm)
6
-
3/4"
(171mm)
1"
(25mm)

10 © 2021 Carrier
INSTALLATION OF CONTROL, SCANNERS AND FLAME DETECTORS
Wiring Base
Mount the wiring base on the burner or on a panel. The location should be free from excessive vibra-
tion and within the specified ambient temperature rating. The base may be mounted in any angular
position.
All wiring should comply with applicable electrical codes, regulations and local ordinances. Use
moisture resistant wire suitable for at least 90°C. Good electrical wiring practice should be followed
to ensure an adequate ground system. Refer to Fireye Service Note SN-100 separately and General
Grounding Rules later in this document for grounding methods.
A good ground system should be provided to minimize the effects of AC quality problems. A properly
designed ground system meeting all the safety requirements will ensure that any AC voltage quality
problems, such as spikes, surges and impulses have a low impedance path to ground. A low impedance
path to ground is required to ensure that large currents involved with any surge voltages will follow
the desired path in preference to alternative paths, where extensive damage may occur to equipment.
Circuit recommendations are found on pages 11 through 13. Consult the factory for assistance with
non-standard applications.
Care must be taken to NOT route the high energy ignition wire in close proximity to the
flame sensor wiring.
INSTALLATION GUIDELINES
Terminal 7 - Interlocks and Limit Switch Input
Wire external interlock, control, and limit switches in series to this input. Guard against induced
voltage levels to wiring connected to this input. In some extreme wiring runs, reduction of induced
voltages may require a load (relay or light) connected to terminal 7 to avoid system error lockouts.
This input is the power source for the valve and ignition output terminals. Be sure all switches wired
to this input can handle the current required by the total of all loads connected to terminals 3, 4, and
5.
Terminal 6 - Combustion Air Switch Input
For purge and modulation models: Wire any switches and contacts in series to this terminal for
proving airflow function and relating to the air failure light. Power must not be immediately present
at terminal 6 when power is first applied to terminals 1 or 7. If the combustion air blower is
controlled outside of the SBSeries system, then a three-way solenoid valve must be connected
between the air switch port and the blower sensing port. The valve de-energized state should vent
the switch to ambient.
WARNING: Controls require safety limits utilizing isolated mechanical contacts. Electronic limit
switches may cause erratic operation and should be avoided.

© 2021 Carrier 11
Terminal 4 - Ignition Wiring
The output terminal normally powers a high voltage transformer. Route the high voltage ignition
wiring a sufficient distance from all sensors and other low voltage wiring to avoid electrical interfer-
ence, which may cause erratic operation of the SBSeries system. Keep the high voltage wire as short
as possible. The best condition is to mount the ignition transformer close to the burner and keep a
low impedance path from the burner ground to the ground of the transformer. Make sure the high
voltage lead and ground return paths do not create a loop antenna around the SBSeries and sensor
wiring.
Low Fire Start Switch, (Terminal 3 –resistance through valve coil)
For modulation sequence models: It is possible to wire the system for checking low fire start position
prior to pilot ignition. To use this feature, the low fire start switch must be connected between terminal
3 and the pilot valve. On direct spark burners, a by-pass contact must be wired around the low fire
switch.
Terminal V or D - Main Valve Closed Switch Input
The system can be wired to check for the main valve closed switch on the main gas valve prior to
start-up and after the end of the burner cycle.
For purge and no purge models: The main valve closed switch must be connected to Terminal V
and the jumper in the base must be cut.
For modulation models: The main valve closed switch must be wired in series between the airflow
switch and the high purge damper switch. To use this feature, the jumper in the base must be cut.
Terminal D - High Purge Switch Input
For modulation models: the system can be wired to check high purge position for the high fire purge
portion of the sequence. To use this feature, the red jumper in the base must be cut and the high purge
position switch must be connected from terminal If this feature is not used, the jumper in the base
remains intact a jumper must be installed between terminals 1 and D. (The yellow jumper on the base
has no effect whether cut or intact.)
Terminal 1 - Remote Reset
This feature permits remote mounting of a switch to reset the SBSeries. To use this feature, a normally
closed remote reset switch must be wired so that power is interrupted to terminal 1. When it is pressed
or actuated, the connection to terminal 1 is momentarily interrupted and resets the SBSeries.
Remote Display
The SB20896 remote display is wired according to Figure 10. Mount through a DIN cutout using the
two supplied brackets in either the top and bottom or the side slots. Locate the display and wiring to
minimize electrical interference. Applying and disconnecting the display power supply should
coincide with power to terminal 1 of the SBSeries. Use the appropriate cable (P/N SB20318) to connect
to the test jack and to the S2 terminal of the SBSeries wiring base. Do not attempt to parallel the test
jack signal to other devices when using a remote display. The LCD display contrast can be adjusted
on the back with a small blade screwdriver.
Note:
1. Control circuit wires must meet 90°C (194°F) specification minimum and must be 1.5mm (No.
16 AWG) or larger and in accordance with all applicable codes.
2. Flame sensor wires must be individually run in their own separate conduit; multiple unshielded
flame sensor wires CANNOT be run together in a common conduit or wire way (See Sensor
Installation Section).
3. The neutral wire to terminal 2 must be at ground potential (bonded at the supply source).

12 © 2021 Carrier
WARNING: Install a modulation sequence model into the modulation style base only; never plug
into purge or no-purge bases.
FIGURE 5.
WIRING FOR NO PURGE MODELS
FIGURE 6.
WIRING FOR PURGE MODELS

© 2021 Carrier 13
FIGURE 7. WIRING FOR DIRECT SPARK OF MAIN FLAME, NO PURGE MODELS & PURGE MODLES
FIGURE 8.
WIRING FOR
MODULATION MODULES
FIGURE 9.
WIRING FOR DIRECT SPARK OF MAIN FLAME, MODULATION MODULES

14 © 2021 Carrier
FIGURE 10.WIRING FOR 120 VAC REMOTE DISPLAY MODULE
Notes for Figures 5 thrOUgh 11
1. Ground, shielding & conduit must not be connected to terminal S2.
2. Control circuit wires must meet 90°C (194°F) specification minimum and must be No.16 AWG
or larger and in accordance with all applicable codes.
3. Flame sensor wires must be individually run in their own separate conduit; flame sensor wires
CANNOT be run together in a common conduit or wireway.
4. Flame signal should read between 4 and 10 VDC with a digital volt meter. Drop off is approxi-
mately 4.0 VDC. Positive test jack point is on the cover marked "Flame Signal" with S2.
5. Neutral must be grounded.
UV/IR FLAME ROD
Self Check UV SB49602-91
(Requires 59-504-010)
FIGURE 11. TYPICAL CONNECTIONS FOR ALL MODELS

© 2021 Carrier 15
OPERATION
Introduction
This section describes the features of the SBSeries CE. It is presented in three categories: Standard
Features, Optional Features, System Errors and Lockout Conditions, and the LED Indicator Lights.
Standard Features
The following functions are standard features on the SBSeries models as noted.
Interlocks and Limit Switch Input (Terminal 7)
This input is considered the normal operation control or run input to the SBSeries system. Interlocks
are generally pressure or temperature switches that when activated will start the burner. Limit switches
are generally pressure, temperature, and other switches that when activated will stop the burner. The
interlocks and limit switches are wired in series. A break in this circuit will shut the burner down, but
will not produce an alarm or lockout condition.
Combustion Air Switch Input (Terminal 6)
For PURGE and MODULATION sequence models: This input is for monitoring the combustion
air switch separately from other interlocks and limits. The SBSeries checks the air flow switch input is
open before start-up, closed during operation, and open again at burner shutdown, thus preventing
operation with an air switch that is defective, maladjusted or bypassed. This input has about a 2 second
delay to filter out and ignore a momentary interruption.
If the input is improperly powered before the fan output is energized, the system error light will blink.
The input must de-energize within 30 seconds or the SBSeries will alarm and lockout.
After the fan output has energized, the air switch input must be made within 10 seconds. If not proven,
then the system will lockout and the alarm output and the air failure light will come on. However, if
the unit has the air switch input hold feature, the sequence is held indefinitely without causing a
lockout. Then when the air switch input is made, the sequence continues.
If the air switch opens during the main firing cycle, the system will lockout and the alarm output and
the air failure light will come on. However, if the unit has the recycle option and the main output has
been operating for at least 35 seconds, the SBSeries will shut-down and restart.
Pre-Purge
For PURGE sequence models: The SBSeries delays the sequence after the air switch is proven by the
specified purge time. Once completed, the sequence continues to the trial for ignition.
For MODULATION sequence models: The purge time is doubled into two sequences. The first is a
high fire purge for the specified time. The second is a low fire purge allowing the air butterfly valve
time to achieve starting position. The high and low fire purge times are the same as determined by
dipswitches SW 4 - SW 7.
The modulation terminals will sequence as follows:
SEQUENCE STEP INTERNAL CONTACTS FUNCTION
Power Off Terminals 10 to 12 LOW
Power On, Limits Off Terminals 10 to 12 LOW
Purge to High Fire Terminals 10 to 13 HIGH
Purge to Low Fire Terminals 10 to 12 LOW
Automatic Modulation Terminals 10 to 11 AUTO
Alarm and Lockout Terminals 10 to 12 LOW

16 © 2021 Carrier
DIP SWITCH SELECTION
Introduction
This section details the location, selection and description of the SBSeries DIP switches which
allow for sequence and timing functions as well as system configuration.
DIP Switch Location
All of the DIP switches are located in the back of each SBSeries unit. (see following pictures).
DIP Switch Access
To gain access to the DIP switches, the SBSeries must be separated from the back box. This separa-
tion will expose the DIP switches on the back of the SBSeries unit.
No Purge DIP Switch Settings
No Purge models of the SBSeries only use three of the eight DIP switches as shown in the
following pictures. They are as follows:
SW1: Recycling mode selection (On =Recycling; Off =Non-Recycling)
SW2: Pilot selection (On =Intermittent, where pilot remains on during burner cycle; Off
=Interrupted, where pilot valve closes after the main burner is established)
SW3: Trial for ignition range selection (For SB5602/SB5603units: On =10 seconds; Off =5 seconds.
For SB5605 units: On =10 seconds; Off =15 seconds).
Modulation and Purge DIP Switch Settings
SW1: Recycling mode selection (On =Recycling; Off =Non-Recycling)
SW2: Pilot selection (On =Intermittent, where pilot remains on during burner cycle; Off
=Interrupted, where pilot valve closes after the main burner is established)
SW3: Trial for ignition range selection (For SB5602/SB5603units: On =10 seconds; Off =5
seconds. For SB5605 units: On =10 seconds; Off =15 seconds).
SW4: through SW7: Purge time selection. Total purge time is the sum of each switch selected. If
all are set off, the trial for ignition starts when the air switch input comes on. Switch timings are:
SW4 = 15 sec, SW5 = 30 sec, SW6 = 60 sec, SW7 = 120 sec.
SW8: Post purge selection. (On =15 seconds post purge)
If the air switch opens during the main firing cycle, the system will lockout and the alarm output
and the air failure light will come on. However, if the unit has the recycle option and the main
output has been operating for at least 35 seconds, the SBSeries will shut-down and restart.
NOTE: Flame Failure Response = 3 seconds +/- 0.5 seconds for all models.

© 2021 Carrier 17
Main Fuel Valve Closed Switch (Terminal V)
For NO-PURGE and PURGE sequence models: The SBSeries can be interlocked with the main valve closed
position switch. This feature checks the switch position before start-up and after shut-down to insure proper valve
operation when the jumper on the base is cut.
For MODULATION models: When wired, the system checks for the low fire start position prior to light off.
Main Fuel Valve Closed / High Fire Purge Check (Terminal D)
For MODULATION sequence models: This feature is enabled when the jumper on the base is cut. The system
checks that the high fire purge position switch and the main valve closed switch are both made at the end of the high
fire purge.
Low Fire Start (Terminal 3 – impedance)
For MODULATION sequence models: When wired, the system checks for the low fire start position prior to light-
off.
Pilot Test Mode
In the pilot test mode, the SBSeries will hold the sequence once the pilot flame is
established and prevents energizing the main valve (terminal 5).
Depressing the TEST/RESET button on the front cover enters this mode. When in the
pilot test mode, the green "INTERLOCKS CLOSED" light blinks. To exit the pilot test
mode, simply push the TEST/RESET button 3 times. The green "INTERLOCK
CLOSED" light stops blinking, but remains lit.
Interrupted or Intermittent Pilot
An interrupted pilot shuts off at the time specified by the part number after the main valve is energized. An
intermittent pilot (specified as 00 time) continues during the entire main flame firing cycle.
Spark, Pilot Flame & Main Flame Separation
During the trial for ignition period (TFI), the pilot and ignition outputs remain energized. At the end of the TFI, the
pilot output remains on and the ignition output is de-energized. After a five second delay to prove the pilot or start
flame, the main gas valve is energized.
Post Purge
For PURGE and MODULATION sequence models: Post purge maintains the combustion air fan output for the time
specified after the interlocks and limit switch input have opened.
OPTIONAL FEATURES
The following functions are optional features that must be specified when ordering.
Recycle Mode
With "R" specified, the SBSeries will restart the sequence after flame or air failure. The recycle mode
allows the system to re-initiate the start-up sequence automatically only if the main burner has been
operating for at least 35 seconds. If the pilot or start flame fails to light during recycling, the system
will alarm and lockout. If the recycle is successful and the main burner is once again operational for at
least 35 seconds, the system is enabled for another recycle. At no time will the system recycle in the
event of a pilot or starting flame failure.
Air Switch Input Hold
For PURGE and MODULATION sequence models: With "H" specified, the SBSeries holds the
sequence indefinitely until the air switch input is made. Once made, normal functional sequence
continues.

18 © 2021 Carrier
Manual Reset on Power Outage
With "B" specified, the TEST/RESET button must be pressed twice (in and out) to start the
sequence. The system error light blinks rapidly (about 4 times per second) and a remote display will
show "PUSH RESET TO START".
Remote Display
A remote display is available for the SBSeries. The model SB510 operates on 120VAC and has a
keypad for reset function. The display is mounted through the panel-door and features a liquid
crystal display in a DIN housing. The unit connects to the SBSeries by a cable to the flame signal
test jack, and receives a serial communication on each sequence state change.
The display incorporates the following functions:
1. Provides status messages for the SBSeries sequence, see "Remote Display Messages".
2. Indicates lockout conditions when they occur, as well as the amount of time into the sequence
when the lockout occurred.
3. Provides continuous monitoring of the burner's flame signal strength and run time during main
burner operation.
System Errors and Lockout Conditions
FAULT CONDITION LOCKOUT CONDITION
(Illuminated by the red “Fault Condition” LED on
the front cover) prevents gas ignition. The unit will
continue its sequence after the error is cleared
Energizes the alarm output and deenergizes the gas
valve and ignition outputs. The unit must be reset to
clear the alarm and start the sequence. To reset, the
button must be pressed twice so that the button is in
the out position
The following fault conditions result in immediate lockout conditions:
1. Wiring error that puts external voltage on the output terminals.
2. Welded internal contacts or other malfunctions in the SBSeries.
3. Main fuel valve closed position switch is open after cycle shutdown or before start-up. The sys-
tem error light blinks twice and then remains on. The fan output terminal 8 will energize.
4. Low fire fail (for modulation model) - the low fire switch is open prior to trial for ignition.
5. High fire fail (for modulating model) - the high fire switch is not closed at the end of high fire
purge.
The following situations will result in a lockout condition:
6. Air failure (for purge and modulation models) - loss of combustion air anytime during the oper-
ational cycle. The Air Failure LED will be on for this condition. (See "Recycle Mode").
7. Pilot flame fail - loss of flame during the trial for pilot ignition period. The Flame Failure LED
will be on for this condition.
8. Main flame fail - loss of flame during the main burner trial for ignition or run period (recycling
not selected). The Flame Failure LED will be on for this condition. The following result in lock-
out conditions after 30 seconds, the system error light blinks about 14 times and then remains
on:
9. If a flame is detected out of sequence, which may be caused by:
a. a faulty scanner;
b. electrical interference on the sensor wiring;
c. a flame exists in the burner or in the line of sight of a scanner, due to a gas leak, product fire
or other condition.
10. Air flow switch closed before start-up (for purge and modulation models).

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Status Lights and Push-Button
All of the status lights and the TEST/RESET push-button are located on the front cover of the
SBSeries. This section describes their respective functions.
Interlocks Closed
This green LED illuminates when the operation limits are made.
The limits are wired in series to terminal 7. This input becomes energized to begin the burner
sequence. When in the test mode, this LED blinks (see "Pilot Test Mode").
Air Failure
For purge and modulation models: this red LED illuminates whenever combustion air is lost dur-
ing the operational cycle of the SBSeries.
Fault Condition
This red LED illuminates when a system error is detected (see "System Errors & Lockout Condi-
tions").
Flame Failure
This red LED illuminates when a pilot or main flame fails.
Low Fire
For modulation models: this yellow LED illuminates during the low fire period of the purge cycle.
High Fire
For modulation models: this red LED illuminates during the high fire period of the purge cycle.
Auto
For modulation models: this green LED illuminates during the automatic period which occurs 20
seconds after the main valve is energized.
Test/Reset
This push-button is used to activate the pilot test mode or to reset the SBSeries unit.
Flame Signal
This red LED is located behind the signal test port and illuminates when a flame signal is present.
Note: Communication signals from the remote display are superimposed on the flame signal test
jack. During a valid flame On condition these communication signals will appear to be negligible in
comparison to the flame signal (if measuring the flame signal with a DVM for example). When flame
is off, the display communication signals or display “discover” signals will appear prevalent on the
flame signal test jack. Use of an analog DVM will mask this phenomenon to an extent.

20 © 2021 Carrier