IOM SYSAER R32 (IOM SYSAER R32 01 N 2GB)

English
THE USE OF A GLYCOL-BASED SOLUTION IS THE ONLY EFFECTIVE FROST-PROTECTION MEANS
Caution
25SYSAER R32
Draining the water circuit is not recommended for frost protection, for the following reasons:
² The water circuit will rust, which will shorten its lifetime.
² Water will remain at the bottom of the plate exchangers and freezing may cause damage.
The glycol-based water solution must be sufciently concentrated to ensure appropriate protection and
prevent ice from forming. Take precautions when using non inert MEG antifreeze solutions (Mono Ethylene
Glycol) or MPG (Mono Propylene Glycol). With this type of antifreeze solution, corrosion may occur in the
presence of oxygen.
Contact glycol resellers to ensure that its characteristics are compatible with environmental directive
applicable on site (this is not under manufacturer responsibility).
Glycoling the water loop worsens slightly the performances, in particular the pressure drops. The hereunder
table gives corrective factors with respect of type and concentration of the glycol. For instance, the 20%
MEG glycoling will :
² Increase the pressure drops : with glycol = 1.129 x without glycol
² Increase the owrate : with glycol = 1.040 x without glycol
² Decrease the capacity : with glycol = 0.982 x without glycol
Concentration % 10 20 30
Glycol MEG MPG MEG MPG MEG MPG
Correction
factor
pressure drops
1.070 1.068 1.129 1.147 1.181 1.248
water ow
1.013 1.010 1.040 1.028 1.074 1.050
thermodynamic power
0.991 0.987 0.982 0.975 0.972 0.962
12.2. FROST PROTECTION
12.2.1. WATER LOOP GLYCOLING
The water must be analysed; the hydraulic network system installed must include all elements necessary
for water treatment: lters, additives, intermediate exchangers, drain valves, vents, check valves, etc.,
according to the results of the analysis.
12.3. WATER QUALITY
Using improperly treated or non treated water may cause scaling, erosion, corrosion or algae or sludge
deposits in the exchangers. Refer to a specialist skilled in water treatment to determine any treatment to
apply. The manufacturer will not be held liable for damages caused when non treated or improperly treated
water.