Calorex Pro 40 L Instructivo De Instalación, Operación Y Mantenimiento página 18

18 / EN
• The air tube installation must not be omitted for the cold-water inlet, and we recommend
installing one for the hot water outlet also.
• The air tube discharge must be slightly higher than the upper level of the cistern, by at
least 20 cm (see Fig. 3).
• Long segments of piping should be avoided and/or accessories such as elbows, T
connections, distributing valves, etc. (The recommended distance between the heater
and the point of use should not exceed 10 m).
• To have the correct hot water pressure, the cistern must be at least 2 m above the shower
level.
IMPORTANT:
a loss of line pressure.
Closed or Pressurized System (direct from the water network system): regarding the heater's
water supply, we recommend installing a relief valve (INCLUDED) at the hot water outlet,
calibrated at (0,68 MPa), (7 kg/cm²) (100 psi).
IMPORTANT:
mechanism and does not mean the heater has a failure. Avoid undue water spills by installing a drainage tube
at the relief valve exit towards the drains.
Maximum operating pressure of 0,7 MPa (7,13 kg/cm²)
We recommend checking the relief valve (included) at least once a year, to make sure it is in
good working condition.
Open System Installation Diagram
FIG. 3
Hot water outlet
in the Open System, DO NOT INSTALL the included relief valve, because it could cause
when there is excessive pressure, water exits through the relief valve. This is a normal
Air tubes
Cistern
NPT adapters
(Included)
Union nuts
(not Included)
Air tubes
At least
20 cm
Cold water
inlet
Drain valve
(not included)
To the open drain
(never connect this outlet
to your plumbing system)
Water supply valve
(not included)