Rinnai R85 Tankless Water Heater

Posted on Jan 26, 2009 | 2 comments

Tankless Specs

Specifications

Hot water capacity – Minimum flow – 0.5 gpm (gallons per minute)

– Maximum flow – 5.3 gpm

Anticipated maximum – at 75°F temperature rise (input 45°, output 120°) 4.2 gpm

There should be no single water fixture requiring more than 3.5 gpm

Sized right for our Ontario climate

Input BTU rating: Minimum 15,000 Maximum 180,000

Efficiency rating: 82%

Installation requirements

• Water lines – minimum ¾” required (inlet & outlet) – R-Ready Valve Set included

• Gas lines – sized for 180,000 BTU rating (3/4” minimum, larger with long runs)

• Gas pressure – minimum 6” W.C. (watch low pressure areas)

• Water pressure – target 30 – 80 psi (minimum 15 psi, maximum 150 psi)

• No anti-scald mixing valve required (check with your local municipality)

• Venting – 5” concentric venting (proprietary to Rinnai)

• Outside wall location is recommended – Standard Vent Kit included

Application guidelines

Hard water areas

• Unit is approved for use in areas where the water hardness is less than 12 grains

• Typically, GTA, Ottawa and Niagara municipal water sources qualify

• North (Barrie) and southwestern Ontario likely not eligible

• For hard water areas above 12 grains, please discuss with installation crew. A water softener may be required.

Configuration

• No re- circulating systems permitted (holding tanks, plumbing re-circ, etc.)