HVACopediaMajestic · Gas fireplace · Heating
Millivolt: call for heat
What happens, in order
- Pilot is burning and the thermopile sends millivolts to the valve
- Knob in the ON position
- ON/OFF/RS switch, wall switch or remote closes the circuit across the valve
- Valve opens and the main burner lights
- HI/LO knob sets burner pressure
- Thermopile and thermocouple keep the valve held open
- If the pilot goes out, the safety closes the main gas and pilot gas
Timings and thresholds
| Item | Value |
|---|---|
| Main burner ignition | Under 4 s after turning knob to ON |
| Thermopile minimum | 325 mV |
| Thermocouple minimum | 15 mV |
Applies to: Millivolt models
More Majestic gas fireplace sequences
- Signature Command: power up · Startup
- Millivolt: lighting the pilot · Ignition
- Signature Command: pilot and main burner ignition · Ignition
- Signature Command: flame height control · Heating
- Millivolt: satisfied and shutdown · Standby/shutdown
- Signature Command: shutdown · Standby/shutdown
- Optional thermostat blower (BLOTBLDV) · Other
- Signature Command: pilot flame loss and lockout · Other
Take it to the job
Sequences of operation, error codes and tips work offline in the HVACopedia app.
Source: Majestic DVBL7 Series Installation and Operating Instructions, p. 31, p. 46. 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.