PARTS NAME : HIGH TEMP. THERMISTORPARTS No. : PAC-TH011HT-E SALES MODEL CODE : 7H1THR2GWARNING●●●●●●INSTALLATION MANUAL● Before starting installation, read the following description together with the installation manual included with the unit.● Please read carefully and observe fully the following safety precautions.Precautions that must be observed to prevent injuries or death.WARNINGAfter installation carry out a test run to ensure correct operation, then explain operation method and safety precautions to theend user.Tell your customers to keep this installation manual together with the operation manual, and when they give or sell thismachine to any other person include this installation manual and operation manual with it.Before installing any accessories on the unit ensure the unit is isolated from the power supply.Connections must be made securely and without tension on the terminals.All electrical work should be performed by a qualified technician according to local regulations and the instructions givenin this manual.The flow temperature from boiler MUST NOT exceed 70 °C (*1).Before running Floor Dry-up function, disconnect IN4 and IN5 wirings. (*2)*1 When the temperature sensed by flow temp. thermistor or return temp. thermistor exceeds 80°C, FTC4 will detect it as overheat error.*2 High-temperature water produced by boiler operation could flow in and this could cause a big damage to the floor.Make sure to install the boiler that has overheat protection and output flow temperature control.●BH79T377H02CNP1(WHT)TBI.1CNV1(WHT)FT C 4TBO.2TBO.11 3151315SW31 81 6１２３４５６７８９１０１１１２１３１４１２３４５６７８９１０１１１２１３１４15CN01(BLK)13CN3C(BLU)CNBH(WHT)17CNBC(GLY) 13CNBHT(BLK)13CNIH(ORN)12CN222 4 6 8 10 12 141 3 5 7 9 10 132 4 6 8 10 12 141 3 5 7 9 10 13(BLU)CN2F(YLW)13CN20(RED)CN21(YLW)13CNW12(RED)CNW5(WHT)121412TBI.2LED1LED2CNPWM(WHT)13SW21 8SW11 8SW4CN108CNRF(WHT)LED4LED315CN105(RED)Item Piece1 Boiler flow temp. thermistor (THWB1) 5 m,color: gray 12 Boiler return temp. thermistor (THWB2) 5 m,color: black 13 Installation manual 11 2 3Heat source Heating DHWHeat pumpBoiler —a) Heating room temperature ( )FTC4BoilerOutdoor unitb) Heating flow temperature ( )c) Heating compensation curve ( )FTC4BoilerOutdoor unitWireless remotecontroller (option)orRoom temperaturethermistor (option)orMain controller (remoteposition)Room thermostat (fieldsupply)orWireless remote controller *(option)Room thermostat* Wireless remote controller can be changed to room thermostat.1.2 Pipe work(a) Boiler and heat pump are connected in parallel.(b) Install a mixing tank (field supply).(c) Put 2 thermistors in boiler circuit. (THWB1: Flow temp., THWB2: Return temp.)* It is recommended to protect the thermistors with heat insulating materials so as not to be affected by ambient temperature.Note: These lead wires of the thermistors must avoid being in contact with pipe surfaces.BoilerHeatingMixing tank(field supply)Cylinder unit/HydroboxOutdoor unit123456BoilerHeatingMixing tank(field supply)HydroboxDHW tankOutdoor unit127893456Number Component1 Boiler flow temp. thermistor (THWB1)2 Boiler return temp. thermistor (THWB2)3 Flow temp. thermistor (THW6) (option)4 Return temp. thermistor (THW7) (option)5 Circulation pump (field supply)6 Flow switch (field supply) *1*1 For safety protection, it is recommended to install a flow switch.Number Component1 Boiler flow temp. thermistor (THWB1)2 Boiler return temp. thermistor (THWB2)3 Flow temp. thermistor (THW6) (option)4 Return temp. thermistor (THW7) (option)5 Circulation pump (field supply)6 Flow switch (field supply) *17 Tank water temp. (THW5)8 Immersion heater (field supply)9 3-way valve (field supply) *2*1 For safety protection, it is recommended to install a flow switch.*2 The use of two 2-way valves can perform the same function as a 3-way valve.1. System1) Heat source can be switched between heat pump and boiler by external input from power supplier or outdoor temperature thermistor.2) Heat source can be switched according to running cost, CO2 emission, or outdoor temp.3) In case of outdoor unit failure, backup operation is possible with boiler. *1*1 When Hybrid is selected as heat source.When Dip SW2-5 (Automatic switch to backup heat source operation) is set to ON.Note: FTC4 can control boiler only in space heating mode.1.1 Room thermostat connectionIMPORTANT NOTEBe sure to connect room thermostat to FTC4.When boiler is running, the heating operation is regulated by the room thermostat connected to FTC4.Room thermostat1 2 3 4 5 6 7 8 9 10 11 12 13 14TBI.2THWB1 THWB2
