Mitsubishi Electric EHWT17D-MHEDW, Data Book

Page: 113 / 131

2. Buffer tank control
Buffer tank control operates when heating (or cooling) function is active in the smart grid ready*.
* Refer to the installation manual of indoor unit.
2.1 Wiring for buffer tank control
<Thermistor inputs>
Name Terminal block Item Optional part model
THW6 TBI.5 7-8 Thermistor (Zone1 flow water temp.) (Option)
PAC-TH011-E
THW7 TBI.5 5-6 Thermistor (Zone1 return water temp.) (Option)
THW10 TBI.6 5-6 Thermistor (Mixing tank water temp.) PAC-TH012HTL-E
<Signal inputs>
Name Terminal block Item OFF (open) ON (short)
IN11 TBI.3 3-4
Smart grid ready input
IN11 IN12 Meaning
OFF (open) OFF (open) Normal operation
ON (short) OFF (open) Switch-on recommendation
OFF (open) ON (short) Switch-off command
ON (short) ON (short) Switch-on command
IN12 TBI.3 1-2
2.2 Dip switch setting
Set Dip SW2-6 to ON.
Dip switch Function OFF ON
SW2-6 Mixing tank WITHOUT Mixing tank WITH Mixing tank
2.3 Main controller setting
<Service menu> → “Operation settings” → “Smart grid ready”
Name Description
Heating Target temp.
Target temp. of "Switch-on recommendation".
Target temp. of "Switch-on command".
Cooling Target temp.
Target temp. of "Switch-on recommendation".
Target temp. of "Switch-on command".
Pump
cycles
On/Off
When set to "On", the water circulation pump is operated intermittently according
to the heat storage temp. of the buffer tank.
Interval Re-judgment of the pump on/off time.
Optional parts
D-42
HIGH TEMP. THERMISTOR
6
Optional parts