Schwank SET - SETU Owner's Manual page 34

Flame Fault
If at any time the main valve fails to close completely and maintains a flame, the full time flame
sense circuit will detect it and energize the combustion blower. Should the main valve later
close completely removing the flame signal, the combustion blower will power off following the
optional post purge period.
Fault Conditions
The LED will flash on for 1/4 sec-
ond, then off for 1/4 second during
a fault condition. The pause be-
tween fault codes is 3 seconds.
MOUNTING AND WIRING
The Series 35-61 is not position sensitive and can be mounted vertically or horizontally. The
case may be mounted on any surface with #6 sheet metal screws. All wiring must be done in
accordance with local and national electrical code. Refer to wire diagram page 35 when con-
necting the Series 35-61 to other components in the burner.
WARNING
The Series 35-61 DSI Control uses voltages
of shock hazard potential. Wiring and initial
operation must be done by a qualified service
technician. The control must be secured in an
area that will experience a minimum of vibra-
tion and remain below the operating tempera-
ture of 160ºF. All connections should be
made with UL approved 105ºC rated 18
gauge, stranded, .054 thick insulated wire.
Refer to wire diagram page 35 when con-
necting the Series 35-61 to other compo-
nents in the burner.
CAUTION:
Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper
and dangerous operation. A functional checkout of a replacement control is recommended.
PROPER ELECTRODE LOCATION
Proper location of the electrode assembly is impor-
tant for optimum system performance. The electrode
assembly should be located so that the spark gap is
inside the flame envelope about 1 inch (2.5 cm) from
the base of the flame at the burner cup.
Electrodes should have a gap spacing of 3/16" (0.188" ± 0.031" or 4.76 mm ± 0.81 mm). If this
spacing is not correct, the assembly must be adjusted or replaced. DO NOT adjust the curved
igniter/sensor prong. Adjust/bend only the ground prong (also see next page).
SET(U)-F / ITT(U)-F Manual
IM091221
RD: FEB 2014
RL: 8B
Error Mode
Internal Control Failure
Air Flow Fault
Flame with No Call for heat
Ignition Lockout
TERMINAL SPADE
TH
PSW
V1
IND
NC
L1
24 VAC
V2
GND
Spark
34
LED Indication
Steady on
1 flash
2 flashes
3 flashes
DESIGNATION
1/4" Thermostat Input
1/4" Pressure Switch Input
1/8" Valve Power (MV)
Inducer Blower Output
1/4"
Alarm (Not used)
-
1/4" 120/240 VAC Input (Hot)
1/4" 24 VAC Supply to Processor
1/8" Valve (MV)
1/8" Valve & System Ground
1/4" Spark & Local Flame Sense