Midea M thermal Mono Series Engineering Data page 17

M thermal Mono
5.8 Dual setpoint function application without thermostats
Heating is provided through floor heating loops and fan coil units. The floor heating loops and fan coil units require
different operating water temperatures. The floor heating loops require a lower water temperature in heating mode
compared to fan coil units. To achieve these two set points, a mixing station is used to adapt the water temperature
according to requirements of the floor heating loops. The fan coil units are directly connected to the unit water circuit and
the floor heating loops are after the mixing station. The mixing station is controlled by the unit (or field supply, controls by
itself).
Figure 1-5.8: Dual setpoint function application without thermostats
Table 1-5.8: Dual setpoint function application without thermostats
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 Stop valve (field supplied)
6 Drain valve(field supplied)
7 Fill valve (field supplied)
Notes:
1. The example is just for application illustration; please confirm the exact installation method according to the installation manual.
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8
8.1
8.2
9
10
11
12
13
13.1
13.2
14
FHL 1...n
FCU 1...n
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Balance tank (field supplied)
Air purge valve
Drain valve
Expansion vessel (field supplied)
P_o: Outside circulation pump (field supplied)
Collector / Distributor (field supplied)
Bypass valve (field supplied)
Mixing station(field supplied)
P_c: zone 2 pump (field supplied)
SV3: 3-way valve (field supplied)
Tw2: Zone 2 water flow temp.(field supplied)
Floor heating loop (field supplied)
Fan coil units (field supplied)
202005