The Proper Use and Maintenance of the Gas-fired Unit in the Cellar Or Utility Room A. B. L. Gasman ... The thermostat, zone valve, or aqua- stat, which activates the relay, closes a circuit from the transformer to a magnetic switch. When thisanbsp;...
|Title||:||Home Owner's Guide to Gas Heat|
|Author||:||A. B. L. Gasman|