HVACopediaGlow Brand · Boiler · Startup
Power-up and de-air
What happens, in order
- Power on starts the de-air sequence automatically
- Circulators cycle off and on for about 14 minutes to free air from the heat exchanger
- Display shows dAir during de-air; the boiler ignores heat calls until it finishes
- Hold CH down and DHW down together for 3 seconds to cancel de-air if the system is already purged
- Installer can turn de-air off with parameter 2.139
- After de-air the boiler returns to standby and waits for a CH or DHW demand
Timings and thresholds
| Item | Value |
|---|---|
| De-air duration | 14 min |
| Cancel de-air | hold CH V + DHW V for 3 s |
Applies to: B85, B120, B160
Models
B85B120B160
More Glow Brand boiler sequences
- Ignition and retry · Ignition
- Central heat call and post purge · Heating
- Indirect tank call and priority · Domestic hot water
- Anti-frost pre-heat · Freeze protection
- Anti-legionella cycle · Other
Take it to the job
Sequences of operation, error codes and tips work offline in the HVACopedia app.
Source: Glow Brand B85/B120/B160 Installation and Operating Manual (sections 10.2, 11.7, 11.8, 11.10, 12.1). 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.