
9. Refrigerant and water piping
TCGB0075 rev.0 - 11/2012
103
9
9.2 Space heating hydraulic circuit
D A N G E R
Do not connect the power supply to the indoor unit and DHW tank prior filling of water both circuits and chec
-
king water pressure and the total absence of any water leak.
N O T E
The maximum piping length depends on the maximum pressure availability in the water outlet pipe. Please
check the pump curves.
9.2.1 Hydraulic circuit
Water flow
Flare Nut connection
Brazed connection
Union Nut
Nature
No.
Part name
Factory
supplied
1
Plate heat exchanger (R134a-H2O)
2
Air purger
3
Indoor unit manometer
4
Water pressure switch
5
Expansion vessel
6
Water pump
7
Water outlet thermistor
8
Water flow switch
9
3-way valve
10
T-branch
11
Water pressure port (G 3/8”)
12
Water inlet thermistor
13
Water strainer
14
Safety valve
15
Draining
16
Plate heat exchanger (R410A-H2O)
17
Space heating inlet water pipe (1”)
(accessory)
18
Space heating outlet water pipe (1”)
(accessory)
Field
supplied
19
Shut-off valve (field supplied)
Accessory
20
Water check valve
(ATW-WCV-01 accessory)
Indoor unit hydraulic circuit
Field installation
Space heating
Field
water
circuit
Water inlet
connection (1”)
Water outlet
connection (1”)
Additional hydraulic necessary elements
The following hydraulic elements are necessary to correctly perform the space heating water circuit:
• 2 shut-off valves (field supplied) must be installed in the indoor unit. One at the water inlet connection and the other at
the water outlet connection in order to make easier any maintenance work.
• 1 water check valve (ATW-WCV-01 accessory) with 1 shut-off valve (field supplied) must be connected to the water
filling point when filling the indoor unit. The Check valve acts as a safety device to protect the installation against back
pressure, back flow and back syphon of non-potable water into drinking water supply net.
N O T E
An additional special water filter is highly recommended to be installed on the space heating (field installation),
in order to remove possible particles remaining from brazing which cannot be removed by the indoor unit water
strainer.
Содержание 7E300020
Страница 2: ......
Страница 4: ......
Страница 18: ......
Страница 54: ......
Страница 83: ...6 Working range TCGB0075 rev 0 11 2012 83 6 6 Working range Index 6 1 Working range 84 ...
Страница 94: ......
Страница 134: ......
Страница 146: ......
Страница 150: ......
Страница 156: ......
Страница 157: ......