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Effective: January 2020

2

F-35-53-CE

SEQUENCE OF OPERATION / FLAME 

RECOVERY / SAFETY LOCKOUT

Power Up

During power up the LED shall briefly flash ON for around 1.2 

seconds, then turn OFF to indicate normal operation.

Start-Up - Heat Mode

When a call for heat is received from the thermostat, 12 VDC to 

TH, then control will begin a pre-purge delay. Following the pre-

purge period, the gas valve is energized and sparking com

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mences for the Trial for Ignition (TFI) period.

When flame is detected during the TFI, the sparking process is 

terminated and the gas valve remains energized. The thermo

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stat and burner flame inputs are constantly monitored to assure 

proper system operation. When the thermostat is satisfied and 

the demand for heat ends, the gas valve is immediately de- 

energized.
A post-purge delay ensures the unit is ready for the next call for 

heat.

Failure to Light - Lockout

SINGLE TRIAL MODEL

Should the burner fail to light, or a flame is not detected during 

the TFI period, the gas valve will de-energize and the control 

will go into lockout. The diagnostic LED will indicate the fault 

code for ignition lockout. (3 Flashes)

MULTI TRIAL MODEL

Should the burner fail to light or the flame is not detected 

during the TFI period, the gas valve will de-energize. The con

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trol will then go through an inter-purge delay before an addi

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tional ignition attempt. The control attempts two additional 

ignition trials before de-energizing the gas valve and entering 

lockout. The diagnostic LED will indicate the fault code for igni

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tion lockout. (3 Flashes)

Flame Failure

FLAME FAILURE - RECYCLE MODE (Standard)

With the “Recycle after Loss of Flame” option, upon loss of 

flame, the gas valve is de-energized and the control proceeds 

to inter-purge before attempting to relight the flame. Multi-try 

models permit three tries for ignition including inter-purges. If 

the burner relights, normal operation resumes. If the burner 

does not relight, the control will enter lockout.

FLAME FAILURE - RE-IGNITION MODE

If the established flame signal is lost while the burner is operat

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ing, the control will respond immediately energizing the H.V. 

spark for the TFI period in an attempt to relight the flame. If 

the burner does not light within the TFI, the gas valve will 

immediately de-energize and single try models will enter lock

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out. On multi-try models, a new TFI sequence will begin after 

an inter-purge delay. Multi-try models perform two additional 

attempts to light the burner before de- energizing the gas valve 

and entering lockout. If the burner relights, normal operation 

resumes.

Combustion Airflow Faults

If the airflow signal is lost, or the hi-limit opens during heat 

mode, the gas valve is immediately de-energized and the 

blower stays on. If the switch closes again, a normal ignition 

sequence will resume. If not and this condition persists for 

more than five minutes, the control will enter lockout with the 

blower off.

Lockout Recovery

Recovery from lockout requires a manual reset by either reset

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ting the thermostat, or removing power for a period of 5 sec

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onds. On models with non-volatile lockout, reset must be by 

using the reset switch with 12VDC power maintained.

Summary of Contents for 35-53CE Series

Page 1: ...s the blower function if not required allowing one part to address all service or OEM needs Agency Certifications EN298 CE 584099 Classification BMRVXN Mobile Applications DC supply type A B C Code Compliant to AS 4625 2008 AS 4622 2004 CAN CSA E60730 1 ANSI Z21 20 CAN CSA C22 2 No 60730 2 5 Compliant with current RoHS standards SPECIFICATIONS Input Power Control 9 2 to 15 VDC from a stor age batt...

Page 2: ...stic LED will indicate the fault code for igni tion lockout 3 Flashes Flame Failure FLAME FAILURE RECYCLE MODE Standard With the Recycle after Loss of Flame option upon loss of flame the gas valve is de energized and the control proceeds to inter purge before attempting to relight the flame Multi try models permit three tries for ignition including inter purges If the burner relights normal operat...

Page 3: ...t has been exposed to water must be replaced WARNING All wiring must be done in accordance with both local and national electrical code and by a trained service technician Wiring must be at least 18 AWG rated for 105 C or higher WARNING The 35 53CE uses voltages of shock hazard potential Wiring and initial operation must be done by qualified service technician WARNING Operation outside specificati...

Page 4: ...wer Relay Figure 2 Local Sense without Blower Relay Figure 3 Remote Sense with Blower Relay Figure 4 Remote Sense without Blower Relay DIMENSIONS INTEGRAL STANDOFF 4 250 3 750 250 3 250 2 750 250 6 PIN EDGE CONNECTOR 1 25 NOM 218 MAX 250 Q C H V TERMINAL 164 010 DIA 4 MOUNTING HOLES ...

Page 5: ...lectrode Location Proper location of electrode assembly is important for optimum system performance The electrode assembly should be located so that the tips are inside the flame envelope and about 1 2 inch 1 2 cm above the base of the flame as shown Notes Ceramic insulators must not be in or close to the flame Electrode assemblies must not be adjusted or disassembled Electrodes are NOT field adju...

Page 6: ...s void Troubleshooting Guide Symptom Recommended Actions 1 Dead A Miswired B Transformer battery fault C Fuse circuit breaker fault D No voltage at PWR or AIR E Bad control 2 Thermostat on no blower output A Miswired or failed air flow switch B Faulty thermostat no voltage at thermostat terminal TH C Faulty control 3 Airflow Switch input okay but no TFI after purge delay A Miswired B Faulty contro...

Page 7: ... X X X X DESCRIPTION Trial for Ignition Time 1 5 econds 3 7 econds 5 10 econds 7 25 econds S S S S Inter Purge 0 None 1 15 econds 3 25 econds S S Product Designation 2 CE EN298 Standard Recycle 3 CE EN298 Special Configuration A 3 in this location indicates a special configuration Consult Fenwal controls for operating characteristics of this control Pre Purge 0 None 1 15 Seconds 3 25 Seconds Tries...

Page 8: ...3 SERIES 35 60 61 63 608 SERIES 35 65 66 SERIES 35 9X The object of the declaration described above is in conformity within the relevant union harmonization legislation Gas Appliance Regulation EU 2016 426 Low Voltage Directive 2014 35 EC EMC Directive 2014 30 EC Rohs 2011 65 EU The following harmonized standards and technical specifications have been applied EN298 2012 Automatic Burner Control sy...

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