Honeywell S8910U Installation Instructions And Safety Information Download Page 6

69-0845—2

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S8910U UNIVERSAL HOT SURFACE IGNITION MODULE

Mount the controls high enough above the bottom of the
cabinet to avoid getting wet during normal cleaning
procedures. NEMA 4 enclosure is recommended for the
ignition module; see the Electronic Ignition Service
Manual, form 70-6604.

High Humidity or Dripping Water

Dripping water can cause the module to fail. 

Never install

an appliance where water can drip on the controls.
In addition, high ambient humidity can cause the gas
control to corrode and fail.

If the appliance is in a humid atmosphere, make sure air
circulation around the controls is adequate to prevent
condensation. Also, regularly check out the system. NEMA
4 enclosure is recommended for the ignition module; see
the Electronic Ignition Service Manual, form 70-6604.

Corrosive Chemicals

Corrosive chemicals can attack the module and gas
control, eventually causing a failure. If chemicals are used
for routine cleaning, avoid contact with the controls. Where
chemicals are suspended in air, for some industrial or
agricultural applications, a NEMA 4 enclosure is recom-
mended for the ignition module; see the Electronic Ignition
Service Manual, form 70-6604.

Dust or Grease Accumulation

Heavy accumulations of dust or grease can cause controls
to malfunction. Where dust or grease can be a problem,
provide covers for the module and the gas control to limit
contamination. A NEMA 4 enclosure is recommended for
the ignition module; see the Electronic Ignition Service
Man-ual, form 70-6604.

Heat

Excessively high temperatures can damage controls.
Make sure the maximum ambient temperature at the
control does not exceed the rating of the control. If the
appliance operates at very high temperatures, use
insulation, shielding, and air circulation as necessary to
protect the controls. Proper insulation or shielding should
be provided by the appliance manufacturer; verify proper
air circulation is maintained when the appliance is in-
stalled.

INSTALLATION

When Installing this Ignition System…

1. Read these instructions carefully. Failure to follow

them could damage the components or cause a
hazardous condition.

2. Check Tables 1 through 3 to confirm that the

S8910U is a direct replacement for the existing
module.

3. Installer must be a trained, experienced service

technician.

4. After installation is complete, check out component

and appliance operation as provided in these
instructions.

WARNING

FIRE OR EXPLOSION HAZARD
CAN CAUSE PROPERTY DAMAGE,
SEVERE INJURY, OR DEATH.

1. If the ignition module gets wet, it can malfunc-

tion, leading to accumulation of explosive gas.

Never install where water can flood, drip or
condense on the module.

Never use a module that has been wet.
Replace it.

2. Liquefied petroleum (LP) gas is heavier than air

and will not vent upward naturally.

Do not light the pilot or operate electric
switches, lights or appliances until you are
sure the appliance area is free of gas.

3. Do not attempt to disassemble or clean the

module. Improper reassembly and cleaning can
cause unreliable operation.

CAUTION

1. Disconnect the power supply before beginning

wiring to prevent electrical shock or equipment
damage.

2. If a new gas control is to be installed, turn off

the gas supply before starting the installation.
After the gas control is installed, conduct a Gas
Leak Test according to the gas control manu-
facturer instructions.

3. If a module must be mounted where it can be

exposed to moisture or water, provide a
suitable waterproof enclosure.

4. Using the wire labels provided, label all the

wires before disconnecting. Wiring errors can
cause improper appliance operation and
dangerous conditions such as bypassing safety
features.

Perform Preinstallation Safety Inspection

A preinstallation safety check of the appliance and venting
system

must be done before the replacement module is

installed. If a condition is detected that could result in
unsafe operation, shut off the appliance and advise the
owner of the unsafe condition. Correct any potentially
unsafe condition before proceeding with the installation.

Remove Old Module

Disconnect the power supply before doing any work on the
unit. Disconnect and tag the wires from the old module
using the wire labels provided. Remove the old module
from its mounting location.

Mount New Ignition Module

Mount the S8910U Module in the same location as the old
module. Protect the module from exposure to water,
moisture, corrosive chemicals and excessive dust and
grease. Assure that ambient temperature at the module is
within the range listed in the Application section.

Mount the module with the terminals down to protect from
dripping water and dust. The module can also be mounted
with terminals on either side. 

Do not mount with the

terminals pointing up. Refer to Fig. 1 for mounting recom-
mendations. When it is necessary to drill new mounting
holes, use the S8910U as a template to mark the mount-

Summary of Contents for S8910U

Page 1: ...and seven wire labels The wiring labels are included to assure proper marking of the wires attached to the existing module A complete list of the specific Honeywell and other modules that the SUPER TRADELINE S8910U is designed to replace is provided in Tables 1 through 3 NOTE The S8910U is intended to replace only defective ignition controls The service technician should make sure that the other p...

Page 2: ...59 B Yes R 4 3 30 45 90 50E47 260 thru 269 B Yes R 4 3 0 17 60 Sensor A separate sensor is required for remote sensing applica tions Wiring Use the existing appliance wiring If repair or replacement of leadwires is required follow the instructions on the appliance label Use the included quick connect terminals according to the instructions Prepurge 32 seconds Igniter Warmup 34 seconds Between Tria...

Page 3: ...hru 119 C Yes R 7 1 0 45 NA 50F47 120 thru 129 C Yes R 7 1 17 17 NA 50F47 130 thru 139 C Yes R 7 1 17 45 NA 50F47 140 thru 149 D Yes R 7 3 17 17 77 50F47 150 thru 159 D Yes R 7 3 17 45 77 50F47 160 thru 169 D Yes R 7 3 0 17 60 50F47 170 thru 179 D Yes R 7 3 0 45 60 50F47 201 thru 209 A Yes R 4 1 0 17 NA 50F47 210 thru 219 A Yes R 4 1 0 45 NA 50F47 220 thru 229 A Yes R 4 1 17 17 NA 50F47 230 thru 2...

Page 4: ... No L 4 3 0 34 34 HS780 34NL 306A D No L 6a 3 0 34 34 HS780 34NL 308A D No L 8a 3 0 34 34 HS780 34NL 312A D No L 12b 3 0 34 34 HS780 34NR 104A A Yes R 4 1 0 34 NA HS780 34NR 306A D Yes R 6a 3 0 34 34 HS780 34NR 308A D Yes R 8a 3 0 34 34 HS780 34NR 312A D Yes R 12b 3 0 34 34 HS780 34PL 308A D No L 8a 3 34 34 34 Table 2 Robertshaw Control to Honeywell S8910U Cross Reference NOTE Robertshaw product i...

Page 5: ...under a variety of input conditions to assure reliable operation REVIEW THE INSTALLATION WARNING FIRE OR EXPLOSION HAZARD CAN CAUSE PROPERTY DAMAGE SEVERE INJURY OR DEATH Follow these warnings exactly 1 Review the installation as outlined in this section 2 Plan for frequent maintenance as described in the Maintenance section When hot surface ignition systems are used on central heating equipment i...

Page 6: ...onent and appliance operation as provided in these instructions WARNING FIRE OR EXPLOSION HAZARD CAN CAUSE PROPERTY DAMAGE SEVERE INJURY OR DEATH 1 If the ignition module gets wet it can malfunc tion leading to accumulation of explosive gas Never install where water can flood drip or condense on the module Never use a module that has been wet Replace it 2 Liquefied petroleum LP gas is heavier than...

Page 7: ...check out the S8910U and selection tabs Use only the selection tab specified in Tables 1 through 3 for the existing module being replaced Always remove all unused selection tabs from the job site and discard them at a remote location Improper use of the selection tabs can result in appliance malfunction Fig 2 Separating and installing selection tab Wire the Module CAUTION 1 Check the wiring diagra...

Page 8: ...s ground c Do not use the S8910U VALVE GND terminal VALVE GND and 24V GND are interconnected in the appliance wiring d Remove quick connect and replace with the included 3 16 in quick connect e Do not use this terminal if model being replaced does not have 120V neutral power supply connection f Use the black wire on the included adapter cable g Use the orange wire on the included adapter cable h O...

Page 9: ...UICK CONNECT SUPPLIED BURNER GROUND M8528B AUTO IGNITION SYSTEMS ANSI Z21 20 STATUS LED 1 Flash Ignition Lockout 2 Flash Weak Flame Signal 3 Flash Internal Error Replace Control Pulsing Heartbeat Normal Operation S8910U HOT SURFACE IGNITION INPUT VOLTAGES 120 24 VAC 60HZ HSI 120V 6 5A MAX VALVE 24V 1A MAX TOTAL 24V LOAD 0 2 VALVE LOAD 120VAC HOT 570A0056 WARNING Explosion hazard Can cause serious ...

Page 10: ... GROUND ADAPTER SUPPLIED TO CONNECT S8910U GND BURNER TO APPLIANCE CHASSIS BURNER GROUND M8529B AUTO IGNITION SYSTEMS ANSI Z21 20 STATUS LED 1 Flash Ignition Lockout 2 Flash Weak Flame Signal 3 Flash Internal Error Replace Control Pulsing Heartbeat Normal Operation S8910U HOT SURFACE IGNITION INPUT VOLTAGES 120 24 VAC 60HZ HSI 120V 6 5A MAX VALVE 24V 1A MAX TOTAL 24V LOAD 0 2 VALVE LOAD 120VAC HOT...

Page 11: ...HSI HSI SENSE STARTUPAND CHECKOUT Check out the gas control system At initial installation of the appliance As part of regular maintenance procedures At maintenance intervals determined by the application As the first step in troubleshooting Any time work is done on the system Maintenance frequency must be determined individually for each application see Maintenance section WARNING FIRE OR EXPLOSI...

Page 12: ...water solution Bubbles indicate a gas leak Tighten the joints and screws or replace component to stop a gas leak Recheck with soap and water solution e Check the burner flame condition The igniter sensor or sensor must be constantly immersed in flame Check the burner flame condition as shown in Fig 6 Do not relocate the hot surface igniter or flame rod f Turn the thermostat or controller below the...

Page 13: ...e gas control is closed Fig 7 S8910U normal operating sequence START PREPURGE IGNITER WARMUP CALL FOR HEAT 24V TERMINAL POWERED INTERNAL SAFE START CHECK BEGINS FLAME SIMULATING FAILURE SYSTEM WILL NOT START PREPURGE IGNITER WARMS UP BETWEEN TRIAL PURGE TRIAL FOR IGNITION GAS CONTROL OPENS FOR TIMED TRIAL FOR IGNITION LOCKOUT OCCURS SYSTEM MUST BE RESET GAS CONTROL CLOSES NO FLAME IGNITER OFF FLAM...

Page 14: ... initiates a between trial purge warmup and trial for ignition After the third trial during a single call for heat the module locks out The module must be manually reset following the lockout MAINTENANCE WARNING FIRE OR EXPLOSION HAZARD CAN CAUSE PROPERTY DAMAGE SEVERE INJURY OR DEATH Do not attempt to take apart the module or to clean it Improper assembly and cleaning can cause unreliable operati...

Page 15: ...nections to the ignition module and to the igniter or igniter sensor are clean and tight c Ignition cable provides good electrical continuity Step 2 Check the ignition system grounding Nuisance shutdowns are often caused by a poor or erratic ground a A common ground is required for the module igniter flame sensor and main burner Check for good metal to metal contact between the igniter bracket and...

Page 16: ...CE S8910U MODULE NOTE SYSTEM FAILURE DURING A RUN CYCLE HAS A LOW PROBABILITY OF BEING THE S8910U MAIN BURNER REMAINS POWERED AND LIT MAIN BURNER LIGHTS CHECK FOR 120 VAC ACROSS HOT SURFACE IGNITER TERMINALS NOTE IF S8910U GOES INTO LOCKOUT RESET SYSTEM CHECK CONTINUITY OF GROUND WIRE AND GROUND PATH FROM MAIN BURNER TO GND BURNER TERMINAL OF S8910U CONFIRM THAT 120 VAC HOT LEAD IS CONNECTED TO L1...

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