Reliance water heater manuals are hosted on reliancewaterheaters.com. Many documents are also on hotwater.com (AO Smith corporate site). Printed manuals ship in the box with new units.
Where to download
- reliancewaterheaters.com — search by model number for installation and owner manuals
- hotwater.com — AO Smith corporate hosts many shared Reliance documents
- Reliance support: 1-800-365-4054 — emails PDF manuals within hours
- Ace Hardware online: product pages link to installation manual PDFs
Documents by line
- Standard 6-NORT gas — single manual covers 30/40/50/75-gal atmospheric
- Standard 6-EORS electric — covers 30/40/50/66/80-gal
- 9-NORT / 9-EORS Extended — distinct manuals; insulation and warranty differences documented
- 12-50-NORT Premium — 0.65 UEF model has separate manual
- 6-PVRT Power Vent — venting requirements and PVC sizing emphasized
- SOMS Mini-Tank — installation, mounting, T&P discharge routing
- HPHE Hybrid Heat Pump — extensive: air space, condensate, mode operation, IRA registration. Mandatory reference
Bottom line
Use the model-specific manual. The Hybrid Heat Pump manual is the most important — air space and condensate requirements are non-negotiable for warranty coverage.