6. INSTALLATION
It is necessary to conduct the outlet safety valves of the tank to drain
There is one water pump build inside of our heat pump indoor unit, but the installer need to calculate water flow required and to
overcome the pressure drop during installation machine.
Please check the wiring diagram with the unit for the water pump electricity connection.
A small pump may cause a malfunction or even a fault irreparable.
12
Hydraulic Circuit Connection
Water Pump
Important:
The selection of air conditioning water pump out of the unit should take based on the flow rates
of cooling and heating,internal drop unit (see graph) and the drop of the facility.
Calculation of nominal water flow:
Q water (l / h) = Cooling Capacity
* 0.86
(Kcal / h) /
T (º C)
As
T = (T first exit water temp - water return Temp) _T = 5 º C
Example: Model MQD-14
Q water = (14,600 W * 0.86) Kcal / h / 5 ° C = 2500 l / h
! #%%
The temperature difference in air conditioning heat exchanger should be 5 º C approx. A high temperature
difference can cause a malfunction of the unit and even irreparable damage to it.
Water flow (m3 / h)
1 m.c.a = 10 Kpa
The graph indicates the pressure drop of cooling water circuit of the unit (components inside the unit).
Pre
ssure
dro
p
(m
.c
.a
)
MQD-20
MQD-14
MQD-8
MQD-17
There is one built in water pump(C1) for both DHW and air conditioning. But additional water pump for DHW(C2)
and water pump for air conditioning(C3) can be applied according to actual installation.
Tritherma air conditioning Pressure Drop in Hydraulic Circuit
Air Conditioning Water Pump Selection
It is important keep enough water flow to ensure the heat pump optimized COP and
keep the whole system safe.
