22
Assembly unit
Code
1
2
3
4
5
6
7
8
9
10
11
12
Automatic air purge valve
Expansion vessel (8 L)
Refrigerant gas pipe
Refrigerant liquid pipe
Temperature sensors
Drainage port
Pressure relief valve
Flow switch
Pump_i
Plate heat exchanger
Water outlet pipe
Water inlet pipe
Explaination
Remaining air in the water circuit will be automatically removed
via the automatic air purge valve.
/
Four temperature sensors determine the water and refrigerant
temperature at various points.
5.1-T2B; 5.2-T2; 5.3-Tw_out; 5.4-Tw_in; 5.5-T1
The manometer allows readout of the water pressure in the water
circuit.
If water flow is below 0.6 m
3
/h, the flow switch open, then when the
water flow reach 0.66 m
3
/h,the flow switch close.
The pump circulates the water in the water circuit.
Heat exchanging between water and refrigerant.
/
/
/
/
/
13
14
15
Manometer
Electrical heating belt(14.1-14.2)
Internal backup heater
They are for preventing frozen.(14.2 is optional)
The backup heater consists of an electrical heating element that will
provide additional heating capacity to the water circuit if the heating
capacity of the unit is insufficient due to low outdoor temperatures, it
also protects the external water piping from freezing during cold periods.
The pressure relief valve prevents excessive water pressure in the
water circuit by opening at 43.5psi(g)/0.3MPa(g) and discharging
some water.
Basic
Customized
11
3
4
12
6
14.2
2
7
13
5.4
5.1
9
5.2
14.1
5.3
1 8
14.2
2
7
13
15
5.4
5.1
9
5.2
14.1
5.3
1
8
10
10
11 3 4
12
6
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