Click for larger image
The photo is general in nature, but shows the relationships. The lead for the igniter is 72" long, so the components on the right side of the picture must be well within this distance.
We recommend locating the gas valve and 110 volt electric supply in a 12"x12" space within a wall or the floor near the fireplace.
The following guidelines should be followed in preparation for installation of an Electronic Ignition System:
2) The valve, electronic control module and transformer should be located in a "vault" adjacent to the firebox.
a) Approximate minimum size of vault: 12" x 12" x 12"
b) Gas and 115v electrical services must be delivered to vault. The gas should have a shut off valve at or near the vault.
c) Threaded 1/2" or 3/4" pipe nipple (depending on size of gas log set and gas demand) should extend from vault into firebox for gas supply from valve to burner.
d) An additional 1/2" non-metallic pipe from vault to firebox should be installed as a conduit for the pilot tube and sparker lead.
e) Thermostat bell wire will need to be run from the vault to a switchbox at the desired location of the switch or remote control receiver.
f) The vault will need to be accessible for installation and service of the various components.
Basic Operation of the Electronic Ignition Control System.
The following is the basic operation of the Electronic Ignition Control System. This is not any type of "voodoo" special only to gas log sets. The components we use are used in every day home heating systems.
The system requires gas piped to the inlet of the gas control valve and 115V electricity wired to the transformer.
When you have the call for heat (switch turned to ON), the control module starts the igniter sparking and allows the gas control valve to send gas to the pilot burner. The sparking will continue until a pilot flame is established (justified). Once pilot flame is justified, the control module will allow gas to flow through the gas control valve to the main burner.
Should the pilot flame extinguish (due to an interruption in gas supply, a power failure, or other factors, some environmental, some installation related), the control module loses the pilot justification and stops the flow of gas to the main burner. The igniter will commence an automatic recycling of the pilot until the switch is turned to OFF.
In propane models, a "lockout" control module is used. The lockout feature shuts off all gas at the valve should pilot ignition fail to occur after a period of 60 seconds. After 60 seconds, there is a 5 minute delay, before the next ignition period commences (purge time). After three unsuccessful tries, the system goes into lockout and must be manually reset before commencing another ignition cycle.
In all cases, when the switch is turned to OFF, all gas will cease flowing to both the main and pilot burners.
Whether a safety pilot system is required is a matter of code and/or local custom. A safety pilot kit (SPK) shuts off the flow of gas to the burner in the event the pilot light blows out or if there is a flame-out of the burner. An SPK is required for all propane installations, due to the nature of propane. Propane is heavier than air. In its raw state, propane sinks and pools at the floor. It will continue pooling until it reaches a spark or flame, such as your water heater, furnace pilot light or static electricity. Once it reaches this ignition source...BOOM!!!
Natural gas is lighter than air. In its raw state (such as occurs in a leak or flame-out), natural gas safely vents up the chimney into the atmosphere. Although not necessary, many jurisdictions require the installation of an SPK on natural gas sets. . In any case, a safety pilot kit makes for a convenient means of lighting and enjoying your gas log set.
Please contact me if you have any other questions.
Sincerely, Rett Rasmussen
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