Connections
63
Special Applications - Aquastat
Boiler in a heating/cooling application
Cooling season starts:
close valve v1 and open valve v2
Heating season starts:
close valve v2 and open valve v1
Heating/Cooling unit
Spring-loaded flow check valve
Circulation pump
Automatic air vent,
Pressure relief valve
High limit control
Water chiller
Expansion tank
We strongly suggest that the valves
pictured above be labelled “v1” and
v2.”
Low water cut-off
A low water cut-off may be required by
local codes. If boiler is installed above
radiation level, a low water cut-off
device
of approved type (field
supplied) must be installed in all
instances. Do
not
install an isolation
valve between boiler and low water
cut-off.
5
6
7
1
0
4
4
v
1
.0
v1
v2
F
Fig. 59
5
6
7
1
0
4
4
v
1
.0
IMPORTANT
F
Fig. 60
