INSTALLATION INSTRUCTIONS
69-1227-02
SV9440, SV9540, and SV9640
SmartValve™ System Controls
APPLICATION
The SV9440, SV9540, and SV9640 SmartValve™ System
Controls combine gas flow control and electronic
intermittent pilot sequencing functions into a single
unit. The Q3450 or Q3480 Pilot hardware supplies the
low voltage igniter, flame sensor and pilot burner. These
ignition system controls provide all gas ignition safety
functions by controlling gas flow, ignition source, and a
120 Vac or 240 Vac combustion air blower. The controls
also monitor the appliance airflow proving switch and
limit string to assure proper appliance operation, and
provide prepurge, postpurge, and timed trial for pilot
ignition with 100 percent shutoff and continuous retry. A
diagnostic LED indicates system status.
These controls communicate directly with an electronic
fan timer (ST9160 Electronic Fan Timer for single stage
applications; ST9162 Electronic Fan Timer for two-stage
applications) in typical forced warm air furnace
applications. They also interface with the 208907
Terminal Board, providing compatibility with power
stealing thermostats. Or, they directly interface with the
appropriate power supplies and a system thermostat for
additional appliance applications. When controlled
directly by a thermostat, these controls do not provide a
postpurge function, because power to the control is
removed when the thermostat call for heat ends.
The SV9440, SV9540 and SV9640 Systems are suitable
for a wide range of fan-assisted combustion gas-fired
appliances including furnaces, rooftop furnaces, boilers,
unit heaters, infrared heaters, water heaters and
commercial cooking appliances. The specific
application of the SmartValve System is determined by
the appliance manufacturer.
SmartValve System controls are available in a range of
valve capacities, see Table 1. (Table 2 provides gas
capacity conversion factors.) The suffix letter indicates
temperature range and regulator type, see Table 3.
Table 1. Valve Capacity.
a
a
Capacity based on 1000 Btu/ft3 , 0.64 sp gr natural gas at 1 in. wc pressure drop (37.3 MJ/m3 , 0.6 sp gr natural gas
at 0.25 kPa pressure drop).
b
Capacity is reduced by 5 percent when using an outlet screen.
c
Valves are guaranteed at only 77 percent of the rating.
d
Minimum regulation for LP gas is 15,000 Btuh.
e
Minimum regulation for LP gas is 40,000 Btuh.
f
Minimum regulation for LP gas is 50,000 Btuh.
Model
Inlet-Outlet
Size (in.)
AGA Certified Capacity for
Natural Gas
AGA Certified Minimum
Regulation for Natural Gas
AGA Certified Maximum
Regulation for Natural Gas
ft
3
/hr
m
3
/hr
ft
3
/hr
m
3
/hr
ft
3
/hr
m
3
/hr
SV9440
1/2 x 1/2
85
2.3
10
d
0.4
120
3.4
SV9540
150
4.2
20
e
0.6
200
5.7
SV9640
b,c
240
6.8
30
f
0.8
340
9.6
SV9640
b,c
1/2 x 3/4
270
7.6
370
10.5
SV9640
b,c
3/4 x 3/4
300
8.5
415
11.8