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Description of Electric Valves and Sensors
2Way Valve
The 2way valve is located on the pressurized side of the pump on the lift arm.
When inactive, this valve is normally closed. In its normally closed state, fluid
from the outlet of the pump is returned to the tank. When it is open, fluid is
forced through the heaters then to the reel.
Warming Valve
The 2way warming valve is located towards the rear of the machine in between the heaters. The valve is on
the outlet side of heater #2 and is normally open. When Warmup Valve is activated on the main screen of the
control, it closes the 2way valve on the lift arm and allows flow that has gone through the heaters to be
returned to the supply tank. When the heaters are activated and heating water, the warming valve, when
opened, will allow heated water to be bypassed back to the supply tank until the water temperature reaches
200F. Once the water temp reaches 200F, the warmup valve will automatically close and shut off on the main
screen, forcing the heated, pressurized water out to the reel. The warmup valve is used for initial priming
(allowing bypass water back to tank) and for initial heating of the system so water does not need to be sprayed
on the ground until after the temperature has reached 200F. The warmup valve will also automatically open to
vent hot water back to the tank if the output temperature rises above 270F and the flow stops. When this
occurs, the green indicator light for the warmup valve will illuminate to indicate that the valve is in the open
position.