NordicStove Toby Oil Controller 2.5 Min/9.5 Max 130 Thermost

At the maximum flow rate setting of 9.5 on the Toby DVR5 valve, the NordicStove 130 series operates at an input rating of 20,307 BTU per hour and delivers a proximal heat output of 13,000 BTU. This output level makes the 130 series well suited for heating all-weather tents, small cabins, and compact residential spaces that require more output than the 68 series but less than the larger 250 and 400 series models. Achieving full output requires that the high burn adjustment screws are correctly calibrated for the fuel in use and that adequate chimney draft is present throughout operation.

The thermostat uses a fluid-filled copper sensing bulb connected via a coiled tube to an actuation lever mounted on the oil controller. When ambient room temperature rises above the selected setpoint, the fluid in the bulb expands, pushing the actuation lever downward over the thermostat fuel metering pin, which reduces fuel flow and lowers the burn rate toward the low setting. When the room temperature drops below the setpoint, the fluid contracts, the lever rises, and the controller allows increased fuel flow, raising the burn rate toward the high setting. This fully mechanical process requires no electrical power or batteries at any stage of operation.

The copper sensing bulb should be mounted on the wall near the stove at a position that accurately reflects the ambient room temperature being targeted. The coiled connecting tube can be gently uncoiled to extend the bulb away from the oil controller and place it at the desired height and horizontal distance from the stove. The exact mounting position above the floor and distance from the stove varies by installation and may require adjustment during the initial setup period to achieve the desired room temperature response from the thermostat actuation lever.

The thermostat actuation lever is calibrated to modulate between the specific low and high burn positions established by the oil controller's current adjustment settings. When the controller's high or low burn adjustment screws are changed, the fuel flow rates at those positions shift, meaning the thermostat lever now operates across a different actual fuel delivery range than it was previously set for. Recalibrating the thermostat after any controller adjustment ensures that its temperature response behavior continues to correspond correctly to the actual low and high output levels of the adjusted controller.

The NROIL130T is factory-calibrated for Number 1 grade heating oil and is compatible with Number 2 heating oil, automotive diesel, marine diesel, and kerosene. When any fuel other than Number 1 heating oil is used, the high and low burn adjustment screws may require recalibration, and the thermostat must be recalibrated to match the adjusted output range. Crankcase oil, waste oil, gasoline, white gas, and any mixture containing gasoline must never be used under any circumstances, as these create severe fire and combustion hazards in a vaporizing burner system.

The high burn setting must always be adjusted before the low burn setting on the Toby DVR5 oil controller. Two screws affect fuel flow at the high setting — the high adjusting screw and the high limit screw — and both must be correctly set before any adjustment is made to the low burn position. Before making any adjustments, the chimney must be drafting properly, the fuel tank and filter must be providing unobstructed flow to the stove, and the stove must be confirmed level. Once controller adjustments are complete, the thermostat must be recalibrated to match the new low and high output positions before returning the stove to normal thermostat-controlled operation.