Adding Water - mundoclima AEROTHERM MAM-V9 Serie Manual De Usuario E Instalacion

NOTE
CounterclockWise rotation, remove the flow
switch.
Drying the flow switch completely.
CAUTION
Use of glycol
Glycol use for installations with a domestic
hot water tank: Only propylene glycol
having a toxicity rating or class of 1, as
listed in "Clinical Toxicology of Commercial
Products, 5th edition" may be used. The
maximum allowed water volume is then
reduced according to the figure on page
36.
If there is too much pressure when using
glycol, connect the safety valve to a drain
pan to recover the glycol.
Corrosion in the system due to glycol
Uninhibited glycol will turn acidic under the influence of
oxygen. This process is accelerated by presence of
copper and at higher temperatures. The acidic
uninhibited glycol attacks metal surfaces and forms
galvanic corrosion cells that cause severe damage to the
system. It is of extreme importance:
That the water treatment is correctly executed by a
qualified water specialist.
That a glycol with corrosion inhibitors is selected to
counteract acids formed by the oxidation of glycols.
That in case of an installation with a domestic hot
water tank, only the use of propylene glycol is
allowed. In other installations the use of ethylene
glycol is fine.
That no automotive glycol is used because their
corrosion inhibitors have a limited lifetime and contain
silicates that can foul or plug the system.
That galvanized piping is not used in glycol systems
since it may lead to the precipitation of certain
elements in the glycol's corrosion inhibitor.
To ensure that the glycol is compatible with the
materials used in the system.
Keep dry
Be aware of the hygroscopic property of
glycol. It absorbs moisture from the environ-
ment.
Leaving the cap off the glycol container
causes the concentration of water to
increase. The glycol concentration is then
lower and the water could freeze.
Preventive actions must be taken to ensure
minimal exposure of the glycol to air.
Also refer to "10.3 Pre-operation checks/Checks before
initial start-up".

9.5 Adding water

Connect the water supply to the fill valve and open
the valve.
Make sure the automatic air purge valve is open (at
least 2 turns).
Fill with water until the manometer indicates a
pressure of approximately 2.0 bar. Remove air in the
circuit as much as possible using the air purge
valves. Air in the water circuit could lead to
malfunction of the backup electric heater.
Do not fasten the black plastic
cover on the vent valve at the
topside of the unit when the
system is running. Open air
purge valve, turn anticlockWise
at least 2 full turns to release air
from the system.
128
NOTE