LAARS 9600 CB - Installation, Operation and Maintenance Instructions - Manual (Page 9)

9600 CB
Page 9
Figure 9. Radiant and baseboard heat with more than three zones.
Figure 10. Indirect tank as buffer with potable water storage tank.
1.11 Heating System Piping Hot Supply
Connections
THE CB MUST BE CONNECTED IN A
PRIMARY/SECONDARY TYPE SYSTEM OR
WITH A FULL SIZED BYPASS.
a. Connect the 1¼" supply connection on the unit
to the system bypass. Size the combined length
of supply and return to the loop using Table 2.
b. Pipe the discharge of the relief valve, full size,
to a drain or in a manner to prevent injury in the
event of pressure relief.
c. Install an air purger, an air vent, a diaphragm type
expansion tank, and a hydronic flow check in the
system supply loop. Minimum fill pressure must
be 12psig.
d. Install shutoff valves where required.
e. A hot water boiler installed above radiation level
or as required by the Authority having
jurisdiction, must be provided with a low water
cutoff device either as a part of the boiler or at
the time of boiler installation.
f. The boiler when used in connection with a
refrigeration system, must be installed so the
chilled medium is piped in parallel with the
boiler with appropriate valves to prevent the
chilled medium from entering the boiler.
g. The boiler piping system of a hot water boiler
connected to heating coils located in air
handling units where they may be exposed to
refrigerated air circulation must be equipped
with flow control valves or other automatic
means to prevent gravity circulation of the boiler
during the cooling cycle.