LAARS 9600 CB & HWG - Service Manual - Manual (Page 4)

Page 4
LAARS Heating Systems
(A) Cold Water Inlet From Tank or System
(B) Economizer Outlet (10°F Rise above inlet)
(C) Combustion Coil Inlet 130-140°F Typical
(D) Combustion Coil Outlet
(E) Hot Water Outlet To Tank or System 160 - 170°F Typical
(160° F THERMOSTAT)
Figure 2a. Water Flow through a Heatmaker 9600.
HWG - Before S/N 394 - 068
CB - Before S/N 795 - 0014
THERMOSTATIC
DIVERTING
VALVE
A PORTION OF
HOT WATER
IS RECYCLED
TO MAINTAIN
COMBUSTION
COIL INLET
TEMPERATURE
AT 140°F
(E)
(D)
(A)
(B)
ECONOMIZER
COMBUSTION
COIL