The Honeywell TRADELINE® SmartValve
Controls provide easy field replacement of a wide range
of SV9500, SV9501, SV9502 and SV9602 SmartValve
System models. Gas appliance manufacturers use these
models in many types of gas fired heating appliances
including central furnaces, residential boilers, rooftop
furnaces, commercial cooking appliances, and unit
heaters. These TRADELINE® controls provide
intermittent pilot gas ignition sequencing, pilot flame
sensing, and both pilot and main gas control functions in
a single control. They are directly compatible with the
Q3450 or Q3480 Intermittent Pilot burners used with the
original controls on the appliance.
The TRADELINE® SV9501 and SV9502 SmartValve
models are replacement controls only for the SV9500,
SV9501, and SV9502 models noted in Table 5. Do not
use these controls to replace other types of intermittent
pilot or direct ignition controls. Do not use these controls
to replace SmartValve
Replacement table. The controls might fit, but the gas
flow control functions might not be compatible with the
The TRADELINE® SV9602 SmartValve
replacement controls only for the SV9500P, SV9501P,
SV9502P, SV9600P and SV9601P models noted in Table
5. The SV9602 is a prepurge, step-opening model.
Do not use these controls to replace
Prepurge is nominally 30 seconds.
The step opening function provides a timed step outlet
pressure at the start of each heating cycle to allow main
burner ignition at reduced outlet pressure.
Reducer bushings are provided with the SV9602 and
SV9601 models for adapting to smaller pipe sizes.
models not listed in the
models not listed in the
Carefully determine the full Honeywell model
number of the existing control. Use Table 4 or
Table 5 to make sure the replacement control
model is suitable for replacing the original
control. If the control is not suitable, obtain the
correct TRADELINE® replacement control as
shown in Table 4 or Table 5, or contact the
appliance manufacturer for the proper
When Installing this Product...
1. Read this instructions carefully. Failure to follow
the instructions as written can damage the product
or cause a hazardous situation.
2. Check the relevant chart and the ratings given in
these instructions and on the specific model to
make sure the product is suitable for the
3. Installer must be a trained, experienced, licensed
(if required by local ordinance) technician.
4. Use these instructions to check product operation
after completing installation.
Make sure the control being replaced is
defective. See Fig. 13 through 16 for SV9500,
SV9501, and SV9502 Sequence of Operation
and Troubleshooting procedures.
Planning the Installation
Fire or Explosion Hazard.
Can cause severe injury, death or property
Follow these warnings exactly as written.
1. Plan the installation as outlined in this section.
2. Plan for frequent maintenance as described in
the Maintenance section of this manual.
Intermittent pilot systems used on heating equipment in
barns, greenhouses, and commercial properties, and on
heating appliances such as commercial cookers,
agricultural equipment, and pool heaters make heavy