Maintenance & Troubleshooting - Raypak RSIT30 Installation & Operating Instructions Manual

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
No potable hot water
Water too hot
Insufficient hot water
T&P valve discharges
Cause
Boiler not operating.
Zone valve not opening.
Circulator pump not working.
Tank thermostat.
Scale build-up.
Thermostat set too high.
Tempering valve malfunction.
Thermostat set too low.
Undersized boiler, no priority to
domestic hot water.
Demand higher than indirect
water heater capacity.
Insufficient circulator flow.
Tank temperature too high.
Pressure too high.
Table D: Troubleshooting
Refer to boiler installation manual.
Check boiler circuit breaker.
Check boiler thermostat setting.
Replace zone valve.
Check power supply.
Replace circulator.
Thermostat set too low.
Check thermostat wiring.
Check coil for scale build up. Descale if
necessary.
Adjust thermostat.
Refer to tempering valve instructions.
Adjust thermostat.
Replace boiler or rewire for priority.
Determine peak usage, and check tank
sizing chart.
Install mixing valve, and raise tank tem-
perature.
Check for restrictions in piping.
Check circulator sizing.
Lower tank aquastat setting.
Faulty aquastat.
Check incoming water pressure.
Closed loop systems require an expan-
sion tank.
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Solution