Shutting Boiler Down For Extended Period; Returning The Boiler To Service After Shutdown; Recommended Periodic Testing - Watts AERCO Edge CFR 3000 Operator's And Service Manual

SECTION 8 MAINTENANCE

8.8 Shutting Boiler Down for Extended Period

If the boiler is to be taken out of service for one year or more, do the following.
1. Set Enable/Disable switch on the front panel to the Disable position to shut down the boiler's
operating controls.
2. Disconnect AC power from the unit.
3. Close the water supply and return valves to isolate boiler.
4. Close external gas supply valve.
5. Open relief valve to vent water pressure.
6. Open the drain valve and drain all water from the unit.
7. If the temperature in the storage location will ever get below freezing, for even a short time, you
must drain all water from the unit before the temperature falls below freezing. Step 6 is not sufficient,
as it leaves some water in the bottom of the heat exchanger chamber. You must then use a suction
pump inserted through the inspection ports to remove all water from the bottoms of the heat
exchanger chamber and base assembly.
If temperature falls below freezing, failure to drain water can cause heat exchanger tubes to crack and fail.

8.9 Returning The Boiler to Service After Shutdown

After a prolonged shutdown (one year or more), the following procedures must be followed:
1. Review installation requirements.
2. Inspect all piping and connections to the unit.
3. Inspect exhaust vent and air inlet duct work (if applicable).
4. Perform initial startup per Section 4 of this guide.
5. Perform the instructions in Section 5: Safety Device Testing, above, and all scheduled procedures
described Section 8: Maintenance.

8.10 Recommended Periodic Testing

Periodic testing of all boiler controls and safety devices is required to ensure they continue to operate as
designed. Precautions must be taken while tests are being performed to protect against bodily injury and
property damage. The owner or user of an automatic boiler system should set up a formal system of periodic
preventive maintenance and testing. Tests should be conducted on a regular basis and the results recorded
in a logbook.
TABLE 8-3: Recommended Periodic Testing
ITEM FREQUENCY
NOTE: Refer to indicated sections of this manual for detailed procedures.
Gauges, monitors
and indicators
Instrument and
equipment settings
Firing Rate Control Semi-Annually
•
⚠
⚠
ACTION BY
Daily Operator
Daily Operator
Weekly Operator
Service Tech
•
REMARKS
Visual inspection and record readings in
operator log
Visual check against factory recommended
specifications
Verify factory settings
Verify factory settings
•