Section R20-5-430. Forced Circulation Hot Water Heaters

A.      All water tube or coil-type hot water heaters that require forced circulation to prevent overheating and failure of the tubes or coils shall have a safety control, to prevent burner operation at a flow rate inadequate to protect the hot water heater unit against overheating, at all allowable firing rates. The safety control shall shut down the burner and prevent restarting until an adequate flow is restored.

B.       All water tube or coil-type hot water heaters that require forced circulation to prevent overheating and failure of the tubes or coils, shall have a manually operated remote shut- down switch or circuit breaker and shall be located just outside the hot water heater room door and marked for easy identifica- tion. The shutdown switch shall be installed in a manner to safeguard against tampering. If a hot water heater room door is on the building exterior, the switch shall be located just inside the door. If there is more than one door to the hot water heater room there shall be a switch located at each door. The remote shutdown switch or circuit breaker shall disconnect all power to the burner controls.

Historical Note

New Section made by final rulemaking at 15 A.A.R.

1496, effective August 18, 2009 (Supp. 09-3).