Supplementary Information; Refrigerant Collecting (Pumpdown) For Split Model Systems Only; Back-Up Operation Of Boiler - Mitsubishi Electric ecodan ERST20 series Installationshandbuch

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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 temperature thermostats. *3
Wireless remote controller (option)
Room temp. thermostat (local supply)
Main remote controller (remote position)
*1 The boiler temperature thermistor is an optional part.
*2 OUT10 has no voltage across it.
*3 Boiler heating is controlled on/off by the Room temp. thermostat.
<Main remote controller settings>
1. Go to Service menu > Heat source setting and choose "Boiler" or "Hybrid". *4
2. Go to Service menu > Operation settings > Boiler settings to make detailed settings for "Hybrid" above .
*4 The "Hybrid" automatically switches heat sources between Heat pump (and Electric heater) and boiler.
Product fiche of temperature control
(a) Supplier's name: MITSUBISHI ELECTRIC CORPORATION
(b) Supplier's model identifier: PAR-WT50R-E and PAR-WT51R-E
(c) The class of the temperature control:
(d) The contribution of the temperature control to seasonal space heating energy efficiency: 4%
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