4.6 SYSTEM HYDRAULIC DIAGRAM
1 .......... Alpha hybrid boiler (indoor unit)
2 .......... Alpha heat pump (external unit)
3 .......... Smartech boiler mounted receiver
4 .......... Domestic hot water inlet isolating valve
5 .......... Gas isolating valve
6 .......... Heat pump flow isolating valve with vent
7 .......... Heat pump return isolating valve with vent
8 .......... Heating system
9 .......... Smartech thermostat controller
10 ........ Magnetic system filter (not supplied)
Fig. 4.5
Alpha E-Tec Hybrid - General Information
1
7
5
6
4
2
3
9
Alpha
CLOUD
BUS
BLE
RESET
PWR
MHT
RHT
G
DHW
MW
G DHW MW
R F
OD
10
8
20
.
°
21.5
15°
4
FRI 12:08
NOTE:
This diagram is an example. It is also required to convey the condensate drain of the heat pump and boiler.
NOTE:
System minimum water content:
To ensure correct operation of the heat
pump it is necessary to maintain a minimum
water content in the system equal to 20
litres, for any type of system, it is also
necessary to have a loop that is always
open on the system to allow the heat pump
to perform the antifreeze function.
Maximum length of pipe
between the heat pump
flow and boiler return 10 m
All main pipework for flow and return
between the heat pump, boiler and
radiator distribution circuit must be a
minimum of 22mm.
G .......... Gas supply
DHW .... Domestic hot water outlet
MW ...... Mains water inlet
C .......... Condensate drain
F .......... System flow
R .......... System return
MHT ..... Flow from heat pump
RHT ..... Return to heat pump
OD ....... Outdoor unit water drain
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