Page 44 - IOM / ROOF-TOP FLEXY™ Series
HOT WATER COILS
HYDRAULIC CONNECTIONS
The heating coil is connected to the isolating valves. Two
keys must be used to tighten the connections, one of the
keys maintains the valve body. Failure to use two keys may
damage the pipes and invalidates the warranty.
Proceed as follows :
- Open the stop valves and set the 3-way valve to the
intermediate position (manual position and turn the
thumbwheel to a mid position).
- Fill the hydraulic system and bleed the battery using
the air vent (figure 37).
- Check the connections for possible leaks.
- Reset the 3-way
valve to
automatic.
PROTECTION AGAINST FREEZING
1) Use glycol water
GLYCOL IS THE ONLY
EFFECTIVE PROTECTION AGAINST FREEZING
The antifreeze must protect the unit and avoid icing under
winter conditions.
Warning : monoethylene glycol-based antifreeze may
produce corrosive agents when mixed with air.
2) Drain the installation
You must ensure that the manual or automatic air vents have
been installed on all high points in the system. In order to
drain the system check that all the drain cocks have been
installed on all low points of the system.
To drain, open all the valves and remember to place the
unit in air.
A HEATING COIL FROZEN DUE TO LOW
AMBIENT CONDITIONS IS NOT COVERED BY
THE WARRANTY.
ELECTROLYTIC CORROSION
Attention is drawn to the corrosion problems resulting from
electrolytic reaction created from unbalanced earth
connections.
ANY COIL DAMAGED BY ELECTRONIC
REACTION IS NOT COVERED BY THE
WARRANTY.
Figure 37
Figure 38
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