Rinnai INFINITY A-Series External Gas Continuous Flow Water Heaters

Suitable for:
• external residential applications only
• mains and medium pressure systems

Hard or acidic water will need to be treated to use this product.

• They are not suitable as a spa or swimming pool heater
• They are not suitable for hydronic applications
• They are not suitable as a gas boost for solar installations, or connection with an iHeat, as the temperature cannot be set high enough—use our HD or EF models instead

Gas type

Available for Natural Gas or LPG. Specify gas type at the time of purchase.

General clearances
The following diagram has been provided to assist you in determining where (and if) an external continuous flow water heater can be positioned. If in doubt, prior to purchase, consult a licensed gasfitter.

Factory preset temp.: 55 °C

Model code and REU numbers:

• A16: INFA16N/L - REU-A1620WG-ZK
• A20: INFA20N/L - REU-A2024WG-ZK
• A24: INFA24N/L - REU-A2426WG-ZK
• A26: INFA26N/L - REU-A2626WG-ZK
• A28i: INFA28FFN/L, REU-VCM2837FF-ZK

Hot water capacity:

• A16: 2.1-16 L/min
• A20: 2.5-20 L/min
• A24: 2.1-24 L/min
• A26: 2.1-26 L/min
• A28i: 1.4-37 L/min

Input and output:

• A16: Input: 16.3-124 MJ/h, output 27.4 kW
• A20: Input: 19.9-156 MJ/h, output 33.9 kW
• A24: Input: 16.3-184 MJ/h, output 41.4 kW
• A26: Input: 16.3-199 MJ/h, output 44.2 kW
• A28i: Input: 11-210 MJ/h, output 48.8 kW

Exhaust system:  Forced flue

Frost protection: Fitted as standard. Frost protection operates automatically, as long as the appliance is connected to the electrical power supply, by activating when the temperature inside the unit drops below 3.5 °C, and turns off once the temperature inside the unit reaches 7 °C.

Ignition system: Direct electronic ignition

Injector sizes:

• A16: NG: 0.9, 1.50, LPG: 0.71, 1.09
• A20-A26: NG: 1.08, 1.80, LPG: 0.73, 1.12

Line pressure (min.): NG: 1.13 kPa, LPG 2.75 kPa

Line pressure (max.):

3.5 kPa (maximum standing pressure under abnormal intermittent conditions is 5.0 kPa).

In the case of commercial metering, (i.e. 35-37 kPa coming in), there may be a requirement to regulate the incoming pressure down).

Power consumption

• Normal: 47 W (A16), 58 W (A20), 56 W (A24), 66 W (A26), 95 W (A28i)
• Standby: 2 W
• Automatic Frost Protection: 68 W 

Pressure relief

• Valve opens at 2060 kPa
• Valve closes at 1479 kPa

Noise level: 50 dB(A)

NOx af3: 5 ppm

Safety devices: Flame failure, boil-dry protection, overheat protection, fusible link, pressure relief valve and combustion fan rpm check

Water supply

Nominal operating pressure:

• 120-1000 kPa (A16)
• 160-1000 kPa (A20)
• 200-1000 kPa (A24 & A26)
• 220-1000 kPa (A28i)

Activation flow rate: 1.5 litres per minute

• Weights: A16 = 13 kg, A20 = 14 kg, A24 and A26 = 15 kg, A28i = 21 kg

Compliance

• ES: Supplier Declaration of Compliance
• Declaration numbers:
  • A16 - 1825920179
  • A20 - 1825820179
  • A24 - 1825720179
  • A26 - 1825620179
  • A28i - DEC-000001841X8M7 

Market release: 

• A16-A26: 2018
• A28i: Dec 2021

Colour: 

• White
• Graphite (only available for A16 & A26)

Efficiency: 80%