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12
SUPPLEMENTARY INFORMATION
12-1. Refrigerant collecting (pumpdown) for split model systems only
Refer to "Refrigerant collection" in the outdoor unit installation manual or service manual.
12-2. Back-up operation of boiler
Heating operation is backed up by boiler.
For more details, refer to the installation manual of PAC-TH012HT(L)-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.)
3. Connect the output wire (OUT10: Boiler operation) to the signal input (room thermostat input) on the boiler.
4. Install one of the following room temp. thermostats.
Wireless remote controller (option)
Room temp. thermostat (local supply)
Main remote controller (remote position)
The boiler temperature thermistor is an optional part.
*1
OUT10 has no voltage across it.
*2
Boiler heating is controlled on/off by the room temp. thermostat.
*3
<Remote controller settings>
1. Go to Service menu > Heat source setting and choose "Boiler" or "Hybrid".
2. Go to Service menu > Operation settings > Boiler settings to make detailed settings for "Hybrid" above.
The "Hybrid" automatically switches heat sources between Heat pump (and Electric heater) and boiler.
*4
12-3. Multiple outdoor units control
To realize bigger systems by using multiple outdoor units, up to 6 units of the same model can be connected.
The hydrobox can be used as a sub unit for multiple outdoor unit control.
For more details, refer to the installation manual of PAC-IF071/072B-E.
Check the model name of connecting main unit.
<DIP switch setting>
• Set DIP SW4-1 to ON "Active: multiple outdoor unit control".
• Keep DIP SW4-2 OFF (default setting) (main/sub setting: sub).
• Set DIP SW1-3 to ON when the hydrobox is connected to a DHW tank.
OCH712C
on the boiler circuit.
*1
*3
80
*4
*2
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