43
8
Operational Description
This chapter describes the working circuit and control of Air to Water Heat Pump about the following operations.
Item
Page
8-1
8-1. Basic Operation
1) Operation control
2) Hot water supply operation
3) Heating operation
4) Cooling operation
44 to 46
8-2
8-2. Operation Mode and Control Method
1) Heat pump operation range of hot water supply, heating and cooling
2) Hot water supply operation
3) Heating operation
4) Cooling operation
5) Simultaneous operations of "hot water supply" and "heating"
6) Simultaneous operations of "hot water supply" and "cooling"
7) Boiler control
8) Hot water boost operation
9) Anti bacteria (ANTI BACTERIA) operation
10) Night set back (NIGHT SET BACK) operation
11) FROST PROTECTION operation
12) AUTO operation
13) Night time low-noise operation
47 to 57
8-3
8-3. Hydro Unit Control
1) Capacity control (compressor, high-temperature release, low-temperature release)
2) Heater control
3) Circulation pump control
4) Control by the flow switch
5) Mixing Valve control (2-temperature heating control)
6) Room temperature control
7) Room temperature control with the thermostat
8) Control of force stop and restart
9) Control of limit of heat pump operation
10)Output signal control 1
11)Output signal control 2
12) Q-H characteristics of hydro unit
13) Automatic restart control
14) Piping freeze prevention control
15) High return water protect control.
58 to 71
8-4
8-4. Outdoor unit control
1) PMV (Pulse motor valve) control
2) Discharge temperature release control
3) Current release control
4) Current releases shift control
5) Outdoor fan control
6) Defrosting control
7) Winding heating control
8) Short circuit operation prevention control
9) Over current protection control
10) High pressure release control
11) High pressure switch
12) Compressor case thermostat
13) Bottom plate heater control
72 to 80
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