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SERIES 35-71
120 VAC Microprocessor-Based Direct Spark
Ignition Control with Inducer Blower Relay
FEATURES
•
Safe start with DETECT-A-FLAME
technology
•
Custom pre-purge and inter-purge timings
•
Inducer blower control and airflow switch monitoring
•
Single or three trials for ignition
•
System diagnostic LED
•
Flame current test points
•
Local or remote flame sensing
•
Automatic reset
•
Alarm output (normally closed contact)
•
Open board, potted or enclosure
•
Polarity insensitive input power
APPLICATIONS
•
Commercial cooking
•
Agriculture
•
Infrared burners
•
Construction heaters
•
Other gas-fired appliances
DESCRIPTION
The 35-71 is a 120 VAC direct spark ignition (DSI) control
designed for use in all types of gas-fired appliances. The control
uses a microprocessor circuit to provide precise, repeatable
timing and operating sequences. On-board diagnostics with LED
output makes troubleshooting easy and ensures safe and
efficient operation.
Export Information (USA)
Jurisdiction: EAR
ECCN: EAR99
Agency Certifications
Recognized under the UL component program, UL
R
372. Software certified to ANSI/UL 1998. UL File
MH8817
Design Certified to ANSI Z21.20,
CAN/CSA C22.2 No. 199-M89
®
flame sensing
SPECIFICATIONS
Input Power
Input Current
Gas Valve
Inducer Blower
Operating Temperature
Storage Temperature
Flame Sensitivity
Flame Failure Response
Flame Detector Self-check Rate Once per second minimum
Gas Types
Spark Rate:
Size (LxWxH)
with enclosure
Moisture Resistance
Ingress Protection
Tries for Ignition
Trial for Ignition Periods
Pre-purge and Inter-purge
Timings
Post-purge Time
1
102 to 138 VAC, 50/60 Hz
350 mA @120 VAC with gas valve relay
energized (control only)
1.5A max @ 120 VAC
3.0 FLA @ 120 VAC
-40°F to +160°F
(-40°C to +71°C)
-40°F to +185°F
(-40°C to +85°C)
1.0 µA minimum
0.8 seconds maximum
Natural, LP, or manufactured
Remote
50/60 sparks/sec
Local
25/30 sparks/sec
5.11 x 3.55 x 2.00 inches
(12.98 x 9.02 x 5.08 cm)
Conformal coated to operate non-con-
densing to 95% R.H. Module should not
be exposed to water
Not rated, protection provided by
appliance in which it is installed
One or three try versions available
4, 7, 10, 15 seconds available
0, 5, 15 or 30 seconds available
0, 30 or 60 seconds available
F-35-71
March 2020
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Related Manuals for Fenwal Controls 35-71 Series
Summary of Contents for Fenwal Controls 35-71 Series
- Page 1 SERIES 35-71 120 VAC Microprocessor-Based Direct Spark Ignition Control with Inducer Blower Relay F-35-71 March 2020 FEATURES ® • Safe start with DETECT-A-FLAME flame sensing technology • Custom pre-purge and inter-purge timings • Inducer blower control and airflow switch monitoring •...
- Page 2 SEQUENCE OF OPERATION / FLAME FLAME FAILURE - RECYCLE MODE RECOVERY / SAFETY LOCKOUT 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 Power Up / Stand By models permit three tries for ignition including inter-purges.
- Page 3 BURNER BURNER GROUND Operation outside specifications could result in Figure 2. Remote Sense failure of the Fenwal Controls product and other equipment with potential for injury to people and WARNING property. 120V THERMOSTAT P.SW...
- Page 4 TROUBLESHOOTING Internal Control Failure If the control detects a software or hardware error, all outputs Troubleshooting Guide are turned off and the LED displays a Steady On condition. If this condition persists after an attempt to restart, then the control Symptom Recommended Actions must be replaced.
- Page 5 DIMENSIONS Figure 4. Enclosure Figure 6. Integral Standoff Figure 5. Potted Note: All dimensions are in inches F-35-71 Effective: March 2020...
- Page 6 Method and Reset Method Thermostat / power off reset 0 = 1 try, local sense Consult Fenwal Controls for operating 1 = 1 try, remote sense Thermostat / power off reset characteristics of this control.
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