EZ Plate™ Storage Water Heater
21
PV500-64 12/14
Problem 4: Outlet temperature is too high and above setpoint:
a.
Cause
: Malfunctioning or misadjusted thermostat(s).
Solution
: Adjust thermostat to de-energize domestic circulator pump (and boiler water control valve, if
supplied) at the desired water temperature. If the thermostat is properly adjusted and is not de-energizing
the domestic circulator pump, verify wiring and replace the thermostatic control if necessary.
b.
Cause
: The pump is not deactivating.
Solution
: Relay in the system is malfunctioning. Replace defective components as required.
Problem 5: Heat exchanger visibly leaking.
a.
Cause
: Plumbing connection loose
.
Solution
: Check and tighten plumbing connection.
b.
Cause
: Double-wall heat exchanger leak
.
Solution
: If one or more heat exchanger plate walls are breached, a double-wall heat exchanger will leak at
the joint between the plates. Isolate the heat exchanger and replace one more plates to resolve leak.
c.
Cause
: Single-wall heat exchanger leak
.
Solution
: Once the leak is confirmed to be coming from the heat exchanger, isolate the heat exchanger
and replace.
