GIWH A4 DS Fast R Information Sheet 2021 05 20

010 745 9910 [e-mail] www.ariston.com
WHAT SIZE DO I NEED
With gas instantaneous water heaters it doesn’t really matter how many people there are in your house. What matters more is how many of
them are going to use hot water at the same time. GIWH provide endless hot water on demand, but is limited to the flow rate of the unit. A unit with
16l/min would only be able to supply hot water at a flowrate of 16l/min, which would be sucient for most showers. For any additional shower you
open, the 16l/min would have to be shared among the shower, which will result in a reduced flow and user experience at each shower. Therefore
it is extremely important to understand the peak flow required at any given time. We recommend using Low Flow fittings in showers and on taps to
get the best results from your water heater.
HOW DOES A GAS INSTANTANEOUS WATER HEATER WORK?
A Gas Instantaneous Water Heater does not store any water, it heats up cold water as it flows through the unit. Once a tap is opened and the water
starts flowing, the unit picks up that there is flow through a sensor (5). As this happens the gas valve (4) opens and the Ignition electrode ignites
the gas (a ticking will be heard as a spark is created by the electrode). The cold water then runs through the Heat Exchanger (1) and gets heated to
the selected setting. The unit has many sensors for increased safety. If the unit gets too hot, it will be shut o by the sensors (7) or (8). If the flame is
extinguished, the electrode (6) will shut o the gas supply.
TECHNICAL INFORMATION
FAST R FAST EVO
1. Heat exchanger
2. Burner
3. Hot water temperature
sensor
4. Gas valve
5. Water flow switch
6. Ignition and detection
electrode
7. Overheat thermostat
8. Fume sensor
9. Cold water inlet filter
B. Hot water outlet 1/2”
C. Gas Inlet 1/2”
D. Cold water inlet 1/2”
9
6
7
8
1
5
4
3
2
1. Heat exchanger
2. Burner
3. -
4. Gas valve
5. Water valve
6. Ignition and detection
electrode
7. Overheat thermostat
8. Fume sensor
9. Cold water inlet filter
B. Hot water outlet 1/2”
C. Gas Inlet 1/2”
D. Cold water inlet 1/2”
9
6
7
8
1
5
4
2
FAST R
OVERALL DIMENSIONS
Ø a b c d e f g h i j k l m
11L 112 550 44.5 109.3 215.8 325 44.3 111.4 210 223.7 25.7 28 111.4 24.5
14L 132 580 70 132 238 370 28.8 93.9 210.8 225.5 11.4 25 92.8 20.1
A. Hot water outlet G1/2”
B. Gas inlet G1/2”
C. Cold water inlet G1/2”
FAST EVO
OVERALL DIMENSIONS
Ø a b c d e f g h i j k l m
16L 132 580 70 117 264 370 48 58.8 131.5 230 250 23 11.2 22.5
B. Hot water outlet 1/2”
C. Gas Inlet 1/2”
D. Cold water inlet 1/2”