06-237172-002
October 2018
1
APPLICATIONS
The Fenwal 35-608 series Direct Spark Control (35-608) is a
microprocessor based control suitable for many types of heat-
ing applications including HVAC, commercial cooking, furnaces,
boilers, and water heaters that require direct spark ignition,
burner supervision through flame rectification, and safety shut-
off. It is designed for use with Natural, LP, and mixed gases
used in gas-fired appliances.
The microprocessor circuit design of the 35-608 provides pre-
cise, repeatable timing and operating sequences. High energy
spark output and excellent flame sense characteristics provide
reliable burner operation. The on-board diagnostics with LED
output make troubleshooting easy and ensure safe and efficient
operation.
FEATURES
•
Safe start and full-time flame sensing
•
Automatic 1 hour reset after lockout option*
•
Wide variety of prepurge and interpurge timings**
•
Single or three trials for ignition
•
Diagnostic LED with Fenwal error codes
•
Green power LED
•
Remote or local flame sense options
•
RoHS compliant
AGENCY CERTIFICATIONS***
EN298 Classification AMC/RLXK
* Automatic reset after 1 hour is not allowed for CE
approved models.
** Prepurge time cannot exceed interpurge time on CE
approved models.
*** Certification varies by model.
**** EMC emission requirements shall be verified after
incorporation of the burner control system into the end
use appliance.
CSA Design certified to ANSI Z21.20,
CAN/CSA C22.2 No. 199-M99
SPECIFICATIONS
Input Power
Control: 18-30 VAC 50/60 Hz, 8W
(Class 2 Transformer)
Input Current Drain
300 mA @ 24 VAC with gas valve
relay energized (Control only)
Main Gas Valve
5.0A max (continuous)
Operating Ambient Temperature -40°F to + 176°F
(-40°C to +80°C)
Storage Temperature
-40°F to + 185°F
(-40°C to +85°C)
Flame Sensitivity
0.7
μ
A minimum
Flame Failure Response or
Reignition Time
0.8 seconds minimum
Flame Detector Self-check Rate Once per second minimum
Flame Failure Lockout Time
Varies by model, 300 seconds
maximum
Types of Gas
Natural, LP, or manufactured
Spark Rate
Remote sense (50/60 Hz)
Local sense (25/30 Hz)
Size (LxWxH)
5.20 x 3.95 x 2.50 inches
(13.21 x 10.03 x 6.35 cm)
Moisture Resistance
Conformal coated to operate non-
condensing to 95% R.H.
Ingress Protection
Not Rated, Protection provided by
appliance in which it is installed
Tries for Ignition
One or three try versions available
Trial for Ignition Periods
4, 7, 10, and 15 seconds available
Pre-purge Timings
None, 15, or 30 seconds available
Inter-purge Timings
None, 15, or 30 seconds available
SERIES 35-608
INSTALLATION INSTRUCTIONS FOR FENWAL SERIES 35-608
DIRECT SPARK IGNITION CONTROLS
