M thermal Mono
202005 15
Part 1 - General Information
5.7 Dual setpoint function application with two room thermostats
Space heating with two room thermostats application is through floor heating loops and fan coil units. The floor heating
loops and fan coil units require different operating water temperature. 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). With the help of hydronic adapter board(optional) which is connected between hydronic
box and thermostats, maximum 8 thermostats for 8 rooms are available to control heat pump, which greatly improves the
operation convenience.
Figure 1-5.7: Dual setpoint function application with two room thermostats
Table 1-5.7: Dual setpoint function application with two room thermostats
Fill valve (field supplied)
Balance tank (field supplied)
Expansion vessel (field supplied)
P_o: Outside circulation pump (field supplied)
Collector / Distributor (field supplied)
P_i: Circulation pump inside the unit
Bypass valve (field supplied)
Mixing station(field supplied)
Stop valve (field supplied)
P_c: zone 2 pump (field supplied)
SV3: 3-way valve (field supplied)
Room thermostat for zone 1 (field supply)
Tw2: Zone 2 water flow temp.(field supplied)
Room thermostat for zone 2 (field supply)
Floor heating loop (field supplied)
Drain valve(field supplied)
Fan coil units (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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