FEATurES
n
Safe start and full-time flame sensing
n
120/240 field selectable line voltage for use
with 120 VAC ignitor option
n
24/120/240 VAC hot surface ignitor models available
n
Blower control and airflow switch monitoring option
n
Diagnostic LED
n
Multiple trials for ignition
n
Automatic reset option
n
Local or remote flame sensing
n
Flame current test pins
n
Dual speed blower option for LoNox applications
n
Fail-safe gas valve control (35-66 only)
n
CE models available
APPLICATIONS
n
Pool and spa heaters
n
Gas furnaces
n
Water heaters
n
Any 24 VAC gas burner application under 400K BTU
DESCrIPTION
The Series 35-65 and 35-66 controls are designed to perform many
gas-fired 24 VAC appliance functions in a single control, resulting
in lower system cost. This series monitors the demand for heat,
controls the combustion blower, monitors proper airflow, ignites and
maintains the flame during heating, and provides diagnostic support.
The on-board diagnostics with LED output provide assistance with
troubleshooting and ensures safe and efficient burner operation.
The microprocessor circuit design provides precise, repeatable
timing sequences for ignition and purge times (pre-, inter-, and post-)
as well as multiple tries for ignition. The optional 120/240 VAC field
selectable line voltage capability provides additional field service
efficiency and lower inventory costs.
Agency Certifications
Design certified by CSA International to
CAN C22.2 #199-M89 and ANSI Z21.20
for Automatic Ignition Systems, including
UL1998 software review. FM approval
and CE pending on selected models.
SERIES 35-65 & 35-66
24 VAC Microprocessor Based HSI Control
with 120/240 Field Selectable Line Voltage Capability
www.fenwalcontrols.com
1-800-FENWAL-1
Series 35-65, -66
HSI Control
with 120/240 Field Selectable Line Voltage
Page 1
35-65,-66.02
Input power
Voltage
Current
output (ContaCt ratIngs)
gas Valve
Combustion Blower
(Model 35-66 only)
Hot surface element
operatIng teMperature
FlaMe sensItIVIty
types oF gas
IgnItor
enClosure
MoIsture resIstanCe
sIze wItH enClosure
weIgHt
Control:
18 to 30 VAC 50/60 Hz
(Class 2 Transformer)
Line:
24, 120 or 240 VAC
(L1 & L2 only)
300 mA max @ 24 VAC with blower and gas
valve relay energized (Control only)
2.0A max @ 24 VAC
3.0 FLA max @ 120 VAC (1/4 hp)
1.5 FLA max @ 240 VAC (1/4 hp)
5.0A max @ 120/240 VAC
-40ºF to +176ºF (-40ºC to +80ºC)
0.7 microamps minimum
Natural, LP, or manufactured
24 VAC, 120 VAC, or 240 VAC
mini-ignitors and silicon carbide ignitors
depending on model
Gray (Noryl N-190)
Conformal coated to operate non-condensing
to 95% R.H. Care must be taken to protect
module from direct exposure to water
See Figures on Page 7
8 oz including cover
SPECIFICATIONS
®
DS 35 65 66:DS 35 65 66.qxd 9/27/2010 9:08 AM Page 1
