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7
Water to Water Heat Pump (WTW)
(2) Actual measurement by external meter (locally supplied)
FTC has external input terminals for 2 'Electric energy meters' and a 'Heat meter'.
If two 'Electric energy meters' are connected, the 2 recorded values will be combined at the FTC and shown on the main
remote controller.
(e.g. Meter 1 for H/P power line, Meter 2 for heater power line)
Refer to the [Signal inputs] in section "7.2 Wiring diagrams" for more information on connectable electric energy meter and
heat meter.
● Connectable electric energy meter and heat meter
▪ Pulse meter type
Voltage free contact for 12VDC detection by FTC
(TBI.2 1pin, TBI.3 5 and 7 pins have a positive voltage.)
▪ Pulse duration
Minimum ON time: 40 ms
Minimum OFF time: 100 ms
▪ Possible unit of pulse
0.1
100
Those values can be set by the main remote controller. (Refer to the menu tree in "Main Settings Menu".)
<External input settings>
Demand control (IN4)
The selection of "OFF", whilst a signal is being sent to IN4, forcefully stops all the heat source operations and the selection of
"Boiler" stops operations of heat pump and electric heater and performs boiler operation.
Outdoor thermostat (IN5)
The selection of "Heater", whilst a signal is being sent to IN5, performs electric-heater-only operation and the selection of
"Boiler" performs boiler operation.
<Password protection>
Password protection is available to prevent unauthorised ac-
cess to the service menu by untrained persons.
Resetting the password
If you forget the password you entered, or have to service a unit
somebody else installed, you can reset the password to the fac-
tory default of 0000.
1. From the main settings menu scroll down the functions until
Service Menu is highlighted.
2. Press CONFIRM.
3. You will be prompted to enter a password.
4. Hold down buttons F3 and F4 together for 3 seconds
5. You will be asked if you wish to continue and reset the pass-
word to default setting.
6. To reset press button F3.
7. The password is now reset to 0000.
<Manual reset>
Should you wish to restore the factory settings at any time you
should use the manual reset function. Please note this will reset
ALL functions to the factory default settings.
pulse/kWh
1
pulse/kWh
pulse/kWh
1000 pulse/kWh
10 pulse/kWh
Password input screen
Password verify screen
B-253
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