Alfa Laval AquaFirst
Installation, service and operating instruction
8
3.4
Installation of an AquaFirst Indirect (Semi-Instantaneous) unit
Recycling flow rate PR must be < 60% PC flow rate.
Protect the storage tank by installing the added safety valve. Pressure gage=tank MAX working pressure and
can be different from tap water module’s safety valve pressure gauge. The safety vaIve protects the storage
vessel and not the tap water system.
Secondary charging pumps have the following limitations as per water quality:
pH 6 to 9 and TH<25 French degrees (25°TH) or 14 German degrees (14°dH).
Picture 11
REP DESIGNATION
REP DESIGNATION
A
Primary inlet
HE
Heat Exchanger (PHE)
B
Primary Outlet
PP
Primary pump (single/double)
VR
Setting valve
PC
Charging Pump (1 or 2)
CW
Cold water inlet
PR
Recycling pump (on installation)
V3V Mixing 3 port control valve with actuator
V
Manual gate valve
PRV Pressure relief valve
S1
DHW temperature sensor (master)
