Opening The Indoor Unit - EAS ELECTRIC ETHKH160 Manual De Instrucciones

5.9.2.1 Opening the indoor unit

■
The front flap on the indoor unit cover gives access to the
manometer and user interface.
■
The indoor unit cover can be removed by removing the 6
side screws and unhitching the cover.
CAUTION
Make sure to fix the cover with the screws and nylon washers
when installing the cover (screws are delivered as accessory) .
Parts inside the unit can be hot.
■
To gain access to the control box components – e.g. to
connect the field wiring – the control box service panel can be
removed. Thereto, loosen the front screws and unhitch the
control box service panel.
CAUTION
Switch off all power supply – i.e. outdoor unit power supply ,indoor
unit power supply, electric heater and additional heater power supply
before removing the control box service panel.
5.9.2.2 Indoor unit components
6.4
2
6.1
9
11
6.3
6.5
6.2
5
4
7
1. Air vent valve
Remaining air in the water circuit will be automatically removed via
the air vent valve.
2. Backup heater
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.
3. Expansion vessel (1.32 gallons (5 L))
4. Refrigerant liquid connection
5. Refrigerant gas connection
6. temperature sensors
Four temperature sensors determine the water and refrigerant
temperature at various points in the water circuit.
6.1-T2B; 6.2-T2; 6.3-TW_in; 6.4-TW_out; 6.5-T1
Fig.5-1
7. Drain port
8. Manometer
The manometer allows readout of the water pressure in the water
circuit.
9. Flow switch
The flow switch checks the flow in the water circuit and protects the
heat exchanger against freezing and the pump against damage.
10. Pump
The pump circulates the water in the water circuit.
11. Heat exchanger
The manometer allows readout of the water pressure in the water
circuit.
12. Water outlet connection
12.1 Air vent valve
13. Water inlet connection
13.1 Drain valve
14. Safty valve
The pressure relief valve prevents excessive water pressure inthe
water circuit by opening at 43.5psi(g)/3bar(g) and discharging some
water.
15. Electrical heating tape(15.1-15.2)
20
1
3
14
15
15
10
8
13
12.1 12 13.1
V.1