Allied Furnace: Field electrical connections and overcurrent protection
Field electrical connections and overcurrent protection on a Allied furnace: Wiring must meet Class I limits and be protected by a fuse or breaker matched to the unit nameplate. Maximum overcurrent protection allowed is 15 A.
Applies to: Power supply and thermostat wiring
How to fix field electrical connections and overcurrent protection: step by step
- Use a fuse or breaker sized from the nameplate maximum current, never above 15 A.
- Install a separate properly sized disconnect near the furnace.
- Use at least 18 gauge wire rated Class II for thermostat connections.
- Ground the unit per local code, or the NEC (ANSI/NFPA 70) in the USA or CSA C22.1 in Canada. A green ground wire is in the field makeup box.
- Check polarity and ground, because the integrated control is polarity sensitive.
- Leave enough thermostat wire to remove the blower for future service.
- If the makeup box is moved to the right side, plug the unused left side opening after removing the plug from the right side.
If the unit shows an error code, look it up: Allied Furnace codes
Source: Allied 92G1UH installation manual, p. 42. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.