Submittal Sheet

ManualsBrandsFenwal ManualsHeating SuppliesDirect Spark Ignition Control, 120v w/ 0 sec. Prepurge (4 sec TFI)

FEATURES



Two Mounting Configurations

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Open Board With Stand-Off's -

saves space and cost

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Potted - protection for washdown

and extreme vibration

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Multi Pin Connector - fast assembly

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2 Trial for Ignition Options – 1 and 3 try

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4 Trial for Ignition Times – 4, 7,10 and 15 seconds

(customized timings available)

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2 Flame Sense Options – single spark and sense

and remote sense

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Thermostat/Power Off Reset

APPLICATIONS

Any 120 VAC Gas Burner Application under 400K BTU

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Commercial Cooking Equipment

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Ceramic Infrared Heaters

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Black Body Infrared Heaters

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Construction Heaters*

* Line Polarity Insensitive designs available subject

to minimum order quantities

DESCRIPTION

The 35-72 is a 120 VAC direct spark ignition control for

controlling a gas valve and igniting LP or natural gas

on heating equipment that provides a 120 VAC operating voltage.

The microprocessor circuit design provides precise, repeatable

timing sequences for ignition times, purge times (pre- and inter-)

along with multiple tries for ignition and flame sensing during

pre-purge.

Agency Certifications

Design certified by CSA International to CAN C22.2 #199-M89

and ANSI Z21.20 for Automatic Ignition Systems

SERIES 35-72

120 VAC Microprocessor Based

Direct Spark Ignition Control

THE TOTAL SOLUTION FOR

GAS IGNITION CONTROL

Fenwal offers a complete range of ignition control products

including:

 Ignition Controls

 Spark and Flame Sense Electrodes

 Spark and Flame Sense Cables

 Wiring harnesses

Designed, developed and manufactured by Fenwal, these components

integrate seamlessly providing maximum system performance.

Getting Started - Samples

To ensure proper system design and operation, Fenwal provides

sample ignition controls, high-voltage wires and electrodes for trial

and evaluation at no charge. To get you started quickly, Fenwal has

identified our most popular ignition controls, see Page 8. Whether

it is an individual control, complete start-up kit or customized control,

Fenwal is ready to provide your gas ignition solution.

Fenwal Ignition Development Center

Send your equipment to us and we’ll design, install and qualify a

control to meet your exact application requirements. Fully equipped

and staffed with trained technicians, the Fenwal Ignition Development

Center has proven extremely beneficial for many customers focused on

product quality and reducing time-to-market for their appliances.

www.fenwalcontrols.com 1-800-FENWAL-1

Series 35-72, 120 VAC Direct Spark Ignition Control Page 1

35.72.03

Summary of content (8 pages)

PAGE 1
SERIES 35-72 ® 120 VAC Microprocessor Based Direct Spark Ignition Control 35.72.
PAGE 2
SEQUENCE OF OPERATION / FLAME RECOVERY/ SAFETY LOCKOUT Start up - Heat Mode Flame Failure of Established Flame When the thermostat is set above the ambient temperature, 120 VAC are supplied to the L1 terminal. When this occurs the control will power up and perform a self-check routine and begin a prepurge*, if selected. Following the pre-purge, the gas valve is energized and sparks commence until flame is detected or the Trial For Ignition (TFI) period expires.
PAGE 3
MOUNTING AND WIRING Terminal Designations The 35-72 is not position sensitive and can be mounted vertically or horizontally. The control may be mounted on any surface and fastened with #6 sheet metal screws. Secure the control in an area that will experience a minimum of vibration and remain below the maximum ambient temperature of 80°C (175ºF). All connections should be made with UL approved, 105°C rated, 18 gauge, stranded, .054” thick insulated wire.
PAGE 4
ACCESSORIES Figure 4a Proper Electrode Location Proper location of the electrode assembly is important for optimum system performance. It is recommended that the electrode assembly be mounted temporarily using clamps or other suitable means to check the system before permanently mounting the assembly. The electrode assembly should be located so that the tips are inside the flame envelope and about 1/2 inch (10 mm) above the base of the flame. See Figures 3a and 3b. ! CAUTIONS: 1. 2. 3. 4.
PAGE 5
Electrode Assemblies Providing over 1,000 configurations of spark electrodes and flame sense rods, Fenwal has a design for almost any application. The latest state-of-the-art wire forming and assembly equipment is used to accurately and efficiently produce high quality electrodes that deliver the hottest spark. The "Universal" electrodes depicted below are just a sampling of the 1,000 electrode styles available. These electrodes are designed for on-site customization.
PAGE 6
Electrode Assemblies continued REMOTE FLAME SENSE RODS Part Number: 22-100001-080 Part Number: 22-100001-110 Control Wire Harness Select the proper harness (6 or 7 PIN) based on flame sense choice. Once the terminal configuration is determined, complete the part number by replacing the last two digits (“XX”) with the length in inches (“L” dimension). Standard wire lengths are 12, 18, 24, 30, 36, 48, and 60 inches. Example: 05-129892-118 = 18 inches. For other lengths, please contact Fenwal.
PAGE 7
High Voltage Ignition Wire - 3 Types Delivering the 15K to 25K volts of spark energy from the ignition control to the electrode is a vital element of an ignition system. There are 3 material options and multiple terminal configurations available. Shown are the most popular versions offered by Fenwal. To ensure maximum spark energy, it is recommended that the ignition wires not be longer than 36”.
PAGE 8
HOW TO ORDER 35 - 72 5 X0X -XXX Enclosure Configurations and Wiring Options 2 = Potted 4 = Integral Stand-off’s Trial for Ignition Time (TFI) Multi-Pin Connector Multi-Pin Connector (Figure 1) (Figure 2) Inter-Purge Time or Pre-Purge Time Assemblies 0 = None 1 = 15 seconds 2 = 25 seconds 0 = None 1 = 15 seconds 2 = 25 seconds 5 = 5 seconds 8 = Assemblies (may consist of control, high voltage ignition wire, electrode and harness) or Number of Ignition Trials, Flame Sense Method and Lock Out R