- 10 -
Hot water outlet
Do not connect the hot water inlet directly to the copper pipes in order to avoid iron/copper galvanic
couples (risk of corrosion). The hot water inlet (item 10 on page 5) must be fitted with a dielectric coupling
(supplied with the appliance).
If corrosion occurs on a hot water inlet that is not fitted with this protective device, our warranty does not
apply.
Where a maximum hot water delivery temperature is specified by Local, State or Federal
Regulations, a Tempering Valve shall be installed at the Hot Water Outlet, as required.
The included specified Pressure & Temperature Relief Valve must be installed as shown in the
schematic. The PTR valve should be connected to a drain point to accommodate discharge as a
result of both water expansion during heating, and also pressure fluctuations.
A discharge pipe connected to the pressure relief valve is to be installed in a continuously
downward direction and in a frost- free environment.
WARNING: The Pressure Temperature Relief valve and drain line must not be sealed or blocked.
Evacuation
of
condensate
Air passing through the Evaporator may result in some condensation. If the humidity of the
location Warrants, it may be preferable to connect a simple polymer hose from the Condensate
Drain (Item 16), to the convenient PTR drain point.
Depending on the humidity of the air,
up to 0.25l/h of condensate
may form.
Installation schematic for example :
Dielectric
fitting
(Supplied)
Connection tee
(Supplied)
PTR Valve
(700 kPa)
Tempering
valve
Expansion
control
valve
Untempered
hot water
(Kitchen, laundry)
Tempered
water 50°C
(Bathrooms)
Drain
line
Drain
line
Pressure
Limiting
Valve
(560 kPa)
Line
Strainer
Cold water
main supply
Non-return and
isolating valve
