Our electrical controls meet NEC and UL requirements. All controls are prewired.
The heater automatically maintains the operating temperature set by the operator. Accuracy is within a half percent of the set temperature. The heater maintains thermal fluid temperature at the heater's outlet up to 390 degrees F (depending on variables).
The heater has numerous safety features to ensure it always operates within prescribed limits. It will shut down automatically if an abnormal condition develops.
Limit switches and sensors ensure proper operation. They monitor the burner flame, thermal fluid temperature, exhaust gas temperature, flow of thermal fluid, fuel and combustion air pressures.
The heart of the heater control system is a flame monitor with an ultraviolet or infrared scanner. It employs solid-state electronics for reliability and long life.
The flame monitor senses the burner main flame and pilot. It purges the firing chamber before firing. It turns on the pilot for a pre-programmed period and allows the main fuel valve to open only when safe. It shuts off fuel if a flame is not present.
Modulating burner controls provide suitable turndown ratios. Full modulation allows the firing rate to closely match the heat demand. This conserves fuel, reduces temperature overshooting and eliminates constant on-off recycling.
HCM thermal fluid heaters use NEMA 4 control panels, which protect against windblown dust and rain, splashing water and hose-directed water. They are UL approved. Wiring workmanship is meticulous and meets strict standards. All wires and terminals are labeled for easy identification of circuits. A laminated circuit diagram is furnished.
Protection against rust and corrosion
Equipment longevity is achieved by using special protective coatings on all surfaces subject to rust and corrosion. Exterior surfaces of the heaters are first seal-welded and sandblasted to bare metal. They are then coated with zinc primer. Finally they are sprayed with a finish coat of special corrosion-resisting paint designed for marine use.
The heaters are easy to maintain. Components are easy to reach. Electrical controls, motors, and pumps are readily available from our large stock of parts. We can usually provide one-day shipment.