Midea M thermal Mono Series Engineering Data page 11

M thermal Mono
5.2 Space Heating and DHW with solar system
Space heating without room thermostat connected to the unit. Domestic hot water tank is connected to the unit, and the
tank is with solar heating system. Solar water pump is controlled by Tsolar temperature sensor. Balance tank temperature
sensor is used to control on/off of heat pump. Once the heat pump stops, internal pump stops to save energy and then
balance tank provides hot water for space heating. In addition, balance tank temperature control can meet both space
heating and domestic hot water needs at the same time.
Figure 1-5.2: Space heating and DHW with solar system
Table 1-5.2: Space heating and DHW with solar system
Legend
1 Outdoor unit
1.1 Manometer
1.2 Pressure relief valve
1.3 Expansion vessel
1.4 Plate heat exchanger
1.5 Air purge valve
1.6 Flow switch
1.7 P_i: Circulation pump inside the unit
2 Y-shape filter
3 Stop valve (field supplied)
4 Wired controller
5 SV1: 3-way valve (field supplied)
6 Drain valve (field supplied)
7 Fill valve (field supplied)
8 Balance tank (field supplied)
8.1 Air purge valve
Notes:
1. The example is just for application illustration; please confirm the exact installation method according to the installation manual.
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Midea CAC Confidential
Drain valve
Expansion vessel (field supplied)
P_o: Outside circulation pump (field supplied)
Collector / Distributor (field supplied)
Domestic hot water tank (field supplied)
Air purge valve
Heat exchanger coil
Booster heater
T5: Temperature sensor
Hot water tap(field supplied)
P_d: Cycle hot water pump (field supplied)
One way valve(field supplied)
Bypass valve(field supplied)
Solar heater(field supplied)
P_s: Solar pump(field supplied)
Floor heating loop (field supplied)
202005