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INSTALLATION INSTRUCTIONS
69- 1383
SV9520H
SmartValve™ System Control
Line Voltage Polarity Sense Models
APPLICATION
The SV9520H SmartValve™ System Controls combines
gas flow control and electronic direct main burner ignition
sequencing functions into a single unit. The ignition
source is 120V hot surface igniter lighting the main
burner flame. Two types of 120V igniters may be used;
see Table 1. Provides all gas ignition safety functions by
controlling gas flow, ignition source, and a 120 Vac
combustion air blower. The control also monitors the
appliance airflow proving switch circuit and limit string to
assure proper appliance operation. The SmartValve
System Controls provide prepurge, postpurge and timed
trial for ignition with multiple ignition trials and auto reset
from lockout. Diagnostic LED indicates system status.
The control communicates directly with the ST9160
Electronic Fan Timer (EFT) in typical forced warm air
furnace applications. It will also interface with the 208907
Terminal Board, providing compatibility with power
stealing thermostats. Or, it directly interfaces with the
appropriate power supplies and a system thermostat for
additional appliance applications. When controlled
directly by a thermostat, the control does not provide a
postpurge function, as power to the control is removed
when the thermostat call for heat ends.
This system is 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 the
responsibility of the appliance manufacturer. See Table 2
for temperature ranges and regulator types.
SPECIFICATIONS
CAUTION
Equipment Damage Hazard.
Improper replacement can damage
equipment.
The SV9520 provides direct replacement only.
Body Pattern: Straight through with 1/2 in. inlet and 1/2
in. outlet; or 1/2 in. NPT inlet and 1/2 in. inverted flare
outlet.
Electrical Ratings:
System Transformer:
SV9520: 40 VA minimum NEMA rated.
NOTE:
Larger system transformer may be required for
specific application.
Voltage and Frequency:
24 Vac, 60 Hz.
Output Ratings:
Igniter Load: 5A maximum at 120 Vac.
Induced Draft Motor Load: 2.5A Full Load, 10A
Locked Rotor at 120 Vac.
Current at 24 Vac:
Thermostat with control connected directly to
thermostat: 0.25A.
Table 1. SmartValve System Controls Hot Surface Igniter Type.
NOTE:
See Table 4 for gas capacities.
Table 2. Model Number Suffix Letter Designation.
Prepurge Time (Factory-Set): 15 or 30 seconds,
depending on model.
Ignition Activation Period (IAP): 4 or 6 seconds typi-
cal, depending on model.
HSI Warm-up (seconds)
Model Number
Hot Surface Igniter Type
First Try
Subsequent Tries
SV9520H
Norton 601
7
12
Model Number Suffix Letter
Ambient Temperature Range
Pressure Regulator Type
H
0°F to 175°F (-18°C to +79°C)
Slow-opening.