14
MAINTENANCE & TROUBLESHOOTING
The Raypak indirect storage water heater requires little maintenance. Below is a list of maintenance tasks that
should be performed annually.
Visually check for leaks in the system. This includes the domestic water piping, boiler piping, relief valve, and
•
the handhole cover at the top of the tank.
Have the boiler inspected according to its manufacturer’s operation manual.
•
Lift the lever on the relief valve to verify that the valve functions.
•
Periodically open the indirect water heater relief valve to verify its functionality.
•
Problem
Cause
Solution
No potable hot water
Boiler not operating.
Refer to boiler installation manual.
Check boiler circuit breaker.
Check boiler thermostat setting.
Zone valve not opening.
Replace zone valve.
Circulator pump not working.
Check power supply.
Replace circulator.
Tank thermostat.
Thermostat set too low.
Check thermostat wiring.
Scale build-up.
Check coil for scale build up. Descale if
necessary.
Water too hot
Thermostat set too high.
Adjust thermostat.
Tempering valve malfunction.
Refer to tempering valve instructions.
Insufficient hot water
Thermostat set too low.
Adjust thermostat.
Undersized boiler, no priority to
domestic hot water.
Replace boiler or rewire for priority.
Demand higher than indirect
water heater capacity.
Determine peak usage, and check tank
sizing chart.
Install mixing valve, and raise tank tem-
perature.
Insufficient circulator flow.
Check for restrictions in piping.
Check circulator sizing.
T&P valve discharges
Tank temperature too high.
Lower tank aquastat setting.
Faulty aquastat.
Pressure too high.
Check incoming water pressure.
Closed loop systems require an expan-
sion tank.
Table D: Troubleshooting
Summary of Contents for RSIT115
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