23
EXA + WATER-HEATER PAC-S HYDRAULIC CIRCUIT
CiR
VR
R
S
B
CiB
VS
VE
VS
LEGEND
B
Burner
CiB
Water-heater circulating pump
CiR
Heating circulating pump
R
Radiator
Fig. 12
S
Gate valve
VE
Expansion tank
VR
Non-return valve
VS
Safety valve
TAP FOR
USE
BOILER
WATER-HEATER
WASTE
WATER MAIN
SUPPLY