Thermal Imaging (Case Ten)
Case Ten: Incorrect Boiler Piping
Building Type: Approx. 26,000 SF Early Childhood Development with water source heat pump loop.
Complaint: Water Source Heat Pump Loop Too Cold. Heat injection not working properly.
Effect: Heating water short circuit.
Cause: The two boilers in parallel are used to inject heat into the water source heat pump loop. Each boiler has it's own circulation pump. The boiler pumps run whenever the boilers are enabled. The piping configuration for the heat injection loop was piped incorrectly allowing water from boiler 2 to short circuit.See image Pair 1.
Video 1 - Valve in bypass not installed causing hot water to short cycle through East boiler. Hot water not being injected into loop.
Video 2 - Valve installed in bypass. East boiler operation after bypass valve is installed and closed.
Video 3 - Valve reopened to show short cycling of East boiler.
Video 4 - West boiler operation after valve installed and closed.