HVACopedia

Glow Brand · Boiler troubleshooting

Setting up a CH setpoint above 140°F (60°C)

C95C140

What is going on

CH setpoint above 140°F on a Glow C95 or C140, up to 180°F (82°C). Needs CPVC at the boiler and parameter changes. Standard vent pipe will not take the heat.

Likely causes

  • Standard PVC vent pipe at the boiler used with a high flue temperature
  • Setpoint raised without limiting the flue temperature parameter
  • Maximum CH setpoint parameter still at the factory limit

Check in this order

  1. Use CPVC for the first 6 in of straight pipe and one 90° elbow at the boiler, plus 7 equivalent ft for 2 in venting or 3 equivalent ft for 3 in venting.
  2. Change parameter 2.003 to the required CH setpoint.
  3. Change parameter 2.024 to the maximum CH setpoint.
  4. Change parameter 2.138 to limit the maximum flue temperature to 194°F (90°C).
  5. Use the Installer Menu (Section 11.6) to make the parameter changes.
  6. Recheck the settings after a full heating cycle.

Applies to: C95 and C140 with CH setpoint up to 180°F (82°C)

More boiler guides

Related

Glow Brand error codes · Glow Brand parts · Glow Brand tips · Calculators and reference tables

Take it to the job

All guides, error codes and tips work offline in the HVACopedia app.

Open the app

Source: Glow Brand C95 & C140 installation & operating manual, p. 19-21. Written in our own words; check the manual for your exact model.

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.