QuickDraw®
STEAM WITH
b.Cause: Steam valve(s) not fully opening
Solution: Check steam pressure before and after steam valve. The pressure drop should not be more than half of the inlet pressure. Check valve for blockage. Check linkage for adjustment. Check modulating signal (if applicable). Check the supplied voltage to the valve coil.
c.Cause: Piping flow restricted.
Solution: Calculate the flow velocity and expected friction loss. If excessive, larger inlet and outlet piping are necessary.
d.Cause: Main valve malfunction.
Solution: Refer to the valve manual for instructions on main valve repair.
e.Cause: Main valve undersized.
Solution: Check steam pressure before and after steam valve. Check valve capacity against the load. If insufficient, increase trim or valve size.
Problem:
4.Outlet water temperature not constant.
a.Cause: Insufficient recovery
Solution: If the thermostat or controller is always open, then the outlet temperature will vary with load. See above for causes of insufficient recovery.
b.Cause: Malfunctioning thermostat
Solution: Measure the tank temperature near the thermostat and compare to setpoint. The thermostat should turn on and off within 5°F of setpoint.
Problem:
5.Unusual noises coming from heater.
a.Cause: Flashing condensate
Solution: Pinging, rattling or banging noises are usually the result of condensate flashing to steam. Condensate not draining properly. Check that there is not excessive condensate lift. Check the sizing of the trap. Check that the condensate receiver is not pressurized. Check that there is no blockage in the condensate line from the trap to the receiver. Unclog any strainers in the system.
Problem:
6.Heat exchanger visibly leaking.
a.Cause: Plumbing connection loose
Solution: Check and tighten plumbing connection.
b.Cause:
Solution: If one of the tube walls is breached, a
Since PVI cannot control the use of the water heater, water conditions, or maintenance, the warranty on the water heater does not cover poor performance, structural failure, or leaking due to an excessive accumulation of scale.
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