Supplementary Information; Refrigerant Collecting (Pumpdown) For Split Model Systems Only; Back-Up Operation Of Boiler - Mitsubishi Electric ecodan EHST20 Série Manuel D'installation

7
Service and Maintenance
engineers Forms
Commissioning/Field settings record sheet (continued from the previous page)
Main controller screen
Service menu Heat source setting
Operation settings Freeze stat function Outdoor ambient temp. (3 - 20°C)
External input
settings
*3 When Dip SW1-1 is set to OFF "WITHOUT Boiler" or SW2-6 is set to OFF "WITHOUT Mixing tank", neither Boiler nor Hybrid can be selected.
*4 On: the function is active; Off: the function is inactive.
*5 "*" of "*/kwh" represents currency unit (e.g. € or £ or the like)
8

Supplementary information

refrigerant collecting (pumpdown) for split model systems only

Refer to "Refrigerant collection" in the outdoor unit installation manual or service manual.

Back-up operation of boiler

Heating operation is backed up by boiler.
For more details, refer to the installation manual of PAC-TH011HT-E.
<installation & System set up>
1. Set Dip-SW 1-1 to ON "With boiler" and SW2-6 to ON "With Mixing tank".
2. Install the thermistors THWB1 (Flow temp.) and THWB2 (return temp.) *1 on the boiler circuit.
3. Connect the output wire (OUT10: Boiler operation) to the input (room thermostat input) on the boiler. *2
4. Install one of the following room temp. thermostats. *3
Wireless remote controller (option)
Room temp. thermostat (field supply)
Main controller (remote position)
*1 The boiler temp. thermistor is an optional part.
*2 OUT10 has no voltage across it.
*3 Boiler heating is controlled on/off by the room temp. thermostat.
<remote controller settings>
1. Go to Service menu > Heat source setting and choose "Boiler" or "Auto". *3
2. Go to Service menu > Operation settings > Boiler settings to make detailed settings for "Auto" above .
*3 The "Auto" automatically switches heat sources between Heat pump (and Electric heater) and boiler.
49
Parameters
Standard/Heater/Boiler/Hybrid *3
Simultaneous
On/Off *4
operation (DHW/
Heating)
Outdoor ambient temp. (−15 - +10°C)
Cold weather function On/Off *4
Outdoor ambient temp. (−15 - −10°C)
Room temp control Temp. control interval (10 - 60 mins)
(Heating)
Flow temp. range
Heat pump thermo diff.
adjust
Boiler operation Hybrid settings
Intelligent settings
Floor dry up function On/Off *4
Target temp.
Flow temp. (Increase)
Flow temp. (Decrease) Temp. decrease step (−1 - −10°C)
Demand control Heat source OFF/Boiler operation
(IN4)
Outdoor thermostat Heater operation/Boiler operation
(IN5)
Min. temp. (25 - 45°C)
Max. temp. (35 - 60°C)
On/Off *4
Lower limit (−9 - –1°C)
Upper limit (+3 - +5°C)
Outdoor ambient temp. (−15 - +10°C)
Priority mode (Ambient/Cost/CO
2)
Energy price Electricity (0.001 - 999 */kWh) 0.5 */kWh
*5
Boiler (0.001 - 999 */kWh) 0.5 */kWh
CO Electricity
2
emission (0.001 - 999 kg -CO2/kWh)
Boiler (0.001 - 999 kg
-CO2/kWh)
Heat source Heat pump capacity
(1 - 40 kW)
Boiler efficiency
(25 - 150%)
Booster heater 1 capacity
(1 - 20 kW)
Booster heater 2 capacity
(1 - 20 kW)
Start&Finish (25 - 60°C)
Max. temp. (25 - 60°C)
Max. temp. period (1 - 20 days)
Temp. increase step (+1 - +10°C)
Increase interval (1 - 7 days)
Decrease interval (1 - 7 days)
default Field
notes
setting setting
Standard
5°C
Off
−15°C
Off
−15°C
10 mins
30°C
50°C
On
−5°C
5°C
−15°C
Ambient
0.5 kg -CO2/kWh
0.5 kg -CO2/kWh
11.2 kW
80%
2 kW
4 kW
Off
30°C
45°C
5 days
+5°C
2 days
−5°C
2 days
Boiler
operation
Boiler
operation