4
Specification
Designed and made in Japan, the Rinnai INFINITY REU-VCM models are continuous flow gas
hot water heaters with inbuilt frost protection. They have electronic ignition and require electricity
to operate. The internal units are a room sealed appliances. The internal units have an inbuilt
controller on the front panel, the external unit has a status monitor.
The INFINITY HD VCM units are factory preset to 75 °C, but can be set to deliver higher
temperatures, up to 85 °C, making them ideal for commercial applications. The INFINITY A28i is
factory preset to 55 °C and is suitable for residential applications only.
Specification summary
• Colour
Silver (HD), white (A28i)
• Input
11-210 MJ/h
• Output
48.8 kW
•
Efficiency 83.5 %
Suitability
HD49 units are primarily designed for
commercial applications, but can be used for
larger hot water capacity residential projects. The
A28i is suitable for residential applications only.
They are not suitable as a spa or swimming
pool heater, or for hydronic heating.
Hard or acidic water will need to be treated to
use this product.
Capacity
Hot water capacity 1.4-37 litres per minute.
Nominal water capacity 28 litres per minute at a
25° rise (1680 L/h).
Connections
Hot water outlet
R¾ (20 mm)
Cold water inlet
R¾ (20 mm)
Gas supply
R¾ (20 mm)
Exhaust system
: Forced flue
Ignition system
: Direct electronic ignition.
Line pressures
NG
1.13-3.0 kPa
LPG 2.75-3.0 kPa
Line pressure maximum
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 line pressure down.
Ingress protection rating
• HD49kWe
IPX5
• HD49kWi / A28i IPX2
Power consumption
HD49kWe
HD49kWi / A28i
Normal
66 W
95 W
Standby
2 W
2 W
Antifrost
104 W
120 W
Noise level
Internal units: 54 dB(A)
External unit: 52 dB(A)
NOx af
: 40 ppm
Safety devices
• Flame failure
• Boil-dry protection
• Overheat protection (OHS)
• Fusible link
• Pressure relief valve
• Combustion fan rpm check
Water supply
Nominal operating pressure: 220-1000 kPa
Minimum operating pressure: 10 kPa
Minimum water flow: 1.5 litres per minute
Weights
Internal - 21 kg
External - 20 kg
Internal model flueing
The internal HD49kWi and A28i models MUST
USE Rinnai flue components—use of non
approved flue components will result in a
dangerous installation.
A Rinnai flue system must be installed in
accordance with the Rinnai flue installation
manual provided with the flue kit and/or
components. Refer to the flue manual for more
information and flue configuration options.
Summary of Contents for A28i
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