Instructions

Temperature
increase
Flow rate - LPM /
GPM
10 kW
13 kW
15°C / 27°F
9 LPM /
2.4 GPM
12 LPM /
3.2 GPM
20°C / 36°F
7 LPM /
1.8 GPM
9 LPM /
2.4 GPM
27°C / 48°F
5 LPM /
1.3 GPM
7 LPM /
1.8 GPM
35°C / 63°F
4 LPM /
1.0 GPM
5 LPM /
1.3 GPM
45°C / 81°F
3 LPM /
0.8 GPM
4 LPM /
1.0 GPM
Solar Thermal
Heat Pump
Electric or Gas Tank
Gas Instant
CFEWH Series
Gate
Valve 1
Gate
Valve 2
Tempering Valve
Less than 60⁰C / 140⁰F to protect
CFEWH from excess hot water
temperature.
Pressure Reducing Valve to
protect the CFEWH from
excess inline water
pressure.
INSTALLATION SCHEMATIC WHEN
MICROHEAT CFEWH IS USED FOR PREHEATING
EXISTING HOT WATER SUPPLIES
Set Temp on CFEWH
to temperature
required.
Install at the point of
use, where the
Preheater is needed -
such as bathroom or
ensuite or at the hot
water outlet at the
end of a long run.
Depending on
required
flow rates,
you may need the
Tandem solution (2 x
CFEWH units
).
How the CFEWH Preheating Solution works:
The unit is installed to Preheat the
cold water flowing from the hot water pipes to the point of use such as an
Ensuite, bathroom or Kitchen, until the hot water from the existing main hot water heater arrives at the point of use.
As such it is important to understand what minimum hot water flow rates you expect at the Preheated outlet.
Depending on the flow rates you may need a single CFEWH unit or a Tandem system installed (2 x CFEWH Units).
The CFEWH set temperature sets the upper limit of the Preheated water temperature. The CFEWH temperature
setting is normally set below the temperature of the water expected from the main hot water heater, not higher.
When is CFEWH boosting is needed?
•
Does it take too long for
the water to reach your outlet? A CFEWH Preheating solution can be installed to heat the cold water flowing
through your pipes before the hot water comes from the existing water heater.
•
Are you unable to get low flow warm water from your existing water heater? Some Instant water heaters can’t
supply warm water at
low flows. The CFEWH used as Preheater can. Hence, providing a comfortable experience for hand basins and low flow kitchenettes.
Temperature
Valve
Pressure
Reducing Valve
Preheating flow rates of the CFEWH 10 kW
and 13 kW at various Temperature increases.
Double the flow rates below for Tandem units.
Note: These are guidelines only, actual in property flow rates must be taken into account before making your decision and installations must always be completed following
the CFEWH Installation Manual.