Gas/Propane Basics
As we look into some more modern systems
and what specific problems they present,
it is important to understand the
basic fundamentals associated with these
systems. Most of our modern heating equipment in
some way or another involves electronics and the
use of flame rectification as a safety and flameproving
system.
Timmie McElwain
President, Gas Appliance Service
timmcelwain@gastcri.com
The Gas Side—
Honeywell SmartValves™: Part 9
It doesn’t matter if it is a forced warm air furnace
or a forced hot water boiler—the same basic system
is used to perform safe ignition followed by consistent
operation throughout the entire call for heat.
There are, however, different ways the system is
applied from intermittent pilot application to direct
spark ignition and including hot surface ignition
(HSI). Each has its own distinct advantages and problems.
We’ll now attempt to resolve those burner
problems related to these systems, as well as
offer corrections and diagnostics.
We will start with the basics and then continue
to operation, typical problems, diagnosis,
troubleshooting procedures and a final solution
to a particular problem. It’s easy to jump to
conclusions with these systems and just change
parts to hopefully solve a problem. That is, however,
time-consuming and costly.
I invite you to visit our new Facebook page
Timmie’s Tips on Gas at facebook.com/groups/
timmiesgastips. I look forward to seeing you
there.
Figure 2
Sequence of Operation SV9510/20
We are presently doing a series on Honeywell
SmartValve; in this article, we will cover Smart-
Valve Third Generation and walk you through
the step-by-step process of operation with these
controls.
SV9510/SV9520 Sequence of Operation
Figure 1 is the sequence of operation for
SV9510 and SV9520 SmartValve. The various
diagrams featured in this article will show you
the circuits involved.
Referring to Figure 1 and Figure 2 for the
Sequence of Operation and to Figure 3 for a
Figure 1
SV9510/SV9520 Sequence of Operations
20 ICM/November/December 2022