Hot Water Coils - Lennox ROOFTOP FLEXY FCA Series Installation Operating & Maintenance Manual

HO HO HOT W HO HO T W T WA A A A A TER COILS T W T W TER COILS TER COILS TER COILS TER 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 20).
- 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.
Page 26 - IOM / ROOF-TOP FLEXY™ Series
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
CONDENSATE DRAINS
The traps are not assembled when delivered and are stored
in the electrical panel with their clamping collars.
To assemble them, insert them on the condensate tray outlets
and use a screwdriver to tighten the collars (Figure 22).
Figure 20
Figure 21
WARRANTY.
Figure 22