Technical data

32 Installation, Operation, And Service Instructions
11. MULTIPLE BOILER PIPING- REVERSE RETURN FLOW WITH BLEND
PUMP
Figure 28.
*Blend Pump
Check Valve
System
Su
pp
l
y
System
Circulato
r
Pressure
Reduction
Valve
Backflow
Prevente
r
From
City
Water
Su
pp
l
y
Ex
p
ansion Tan
k
Syste
m
Return
Amtrol #720 Air
Eliminator or E
q
ual
*Blend Pum
p
Check Valve
R
S
R
S
Air Se
p
arato
r