HVACopediaHTP · Boiler · Standby/shutdown
Standby and over-temperature protection
What happens, in order
- With no call the burner is off and the control waits
- 0-10 V below 1 V keeps the boiler in standby
- Flue above 210 F no burner, pump off until flue under 194 F (E07)
- Supply or return at 210 F or higher message, pump on, clears below 194 F
- Supply or return above 230 F lockout, pump on
- Water ECO trip F00 lockout, pump on
- Low water pressure no firing, pump off until restored
Timings and thresholds
| Item | Value |
|---|---|
| E07 trip / clear | 210 F / 194 F |
| F05 and F06 message / clear | 210 F / 194 F |
| F05 and F06 lockout | Above 230 F |
| Min system pressure | 10 psig |
Codes you may see during this
Applies to: EL-80, EL-110, EL-150, EL-220, EL-299, EL-399 (N/LP)
More HTP boiler sequences
- Ignition retries and lockout · Ignition
- Central heat call · Heating
- Outdoor reset and warm weather shutoff · Heating
- Indirect water heater call · Domestic hot water
- Pump service mode · Pump/purge
- Cascade operation · Other
Related
Take it to the job
Sequences of operation, error codes and tips work offline in the HVACopedia app.
Source: Elite EL-80 N Installation Manual (LP-293), p. 65, p. 67, p. 68, p. 69, p. 70. Written in our own words; timings can differ by model and software version, so check the manual for your exact unit.
For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.