Recommended Solar System Layout - Rinnai Infinity VT16 REU-VR1620WG Installation Manual

Recommended solar system layout

Warning about hot water
Rinnai continuous flow water heaters configured for solar systems produce hot water
at 75 °C and are not suitable for use with water controllers. The household water
supply MUST be protected by a suitable tempering valve.
Installation
Rinnai continuous flow water heaters in solar installations are only suitable as gas boosters in
solar hot water systems. These models produce water at higher than normal temperatures and
must be connected to the hot water supply by use of a suitable tempering valve.
Install a Rinnai continuous flow water heater using a flow diversion valve as shown below.
Remember 'B to Boiler' when setting up the flow diversion valve.
The water heater must be set to 75 °C (refer dip switch settings on following pages).
Rinnai water controllers cannot be used with Rinnai Infinity solar units as the:
• Hot water does not always pass through the Rinnai Infinity
• Rinnai Infinity dip switch setting of 75 °C is unable to be adjusted
Recommended system layout using a Rinnai Continuous Flow water Heater and Flow Diversion Valve
System configuration to protect for Legionella
If the system is configured according to the details above it will meet the requirements of the
Acceptable Solution G12/AS2 for protection against Legionella. Section 3.5.2 states:
b) the instantaneous water heater must heat all water passing through it to not less
than 70 °C.
Rinnai New Zealand Ltd. Continuous Flow Water Heater Installation Manual:
22
03-11