Units 18-30 Kw: Cascade System Application - Immergas MAGIS M4-30 Use And Installation

8.9 UNITS 18-30 KW: CASCADE SYSTEM APPLICATION.

The units are installed in parallel and can be used for cooling, heating and hot water.
• 6 units can be connected in parallel. For the connection diagram of the electric control system of the system in parallel,
refer to Chap. 9.7.5.
• The system in parallel can control and display operation of the entire system only by connecting the master to the Control
panel.
• If the DHW function is required, the water tank can be connected to the water circuit of the master unit only through a
3-way valve, and controlled by the master unit.
• The connection and the function of the terminal are the same as the single unit. Please refer to application 8.1-8.6.
Code
1-1 Heat pump: master
1-2...1-n Heat pump: slave
2 Y-shaped filter
3 Shut-off valve
4 Control panel
6 Discharge valve
7 Filling valve
8 Balance tank
8.1 Air purge valve
8.2 Discharge valve
9 Expansion vessel
10 P_o: External circulation pump
11 Manifold/distributor
12 Domestic hot water tank
12.1 Air purge valve
12.2 Coil of heat exchanger
Assembly unit Code
12.3 Booster heater
13 T5: DHW tank temperature sensor
14 Hot water cock
15 P_d: DHW pump
16 One-way valve
17 Bypass valve
18 SV1: 3-way valve
19 SV2: 3-way valve
23 Mixing kit
23.1 SV3: 3-way valve
23.2 P_c: Zone 2 pump
24 Tw2: Zone 2 water flow temp.(optional)
25 Tbt1: Temperature sensor, balance tank (optional)
FHL
Floor heating circuit
1... n
FCU
Fan coils
1... n
48
Assembly unit