Mitsubishi Electric Ecodan HUS210FTC4ST, Installation Manual

Page: 47 / 85

24
Electrical Installation
(continued)
Signal Inputs
*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and related parts
may be reduced.
*2. To turn on the boiler operation, use the main controller to select ‘Boiler’ in ‘External input setting’ screen in
the service menu.
Wiring Specification for Signal Inputs
Thermistor Inputs
Do not splice the wiring to extend or shorten it as this could affect correct monitoring of each temperature. If the
wiring is too long, bundle it with a strap to adjust the length. When the wires are wired to adjacent terminals, use
ring terminals and insulate the wires.
*1. The maximum length of the thermistor wiring is 5m.
*2. Except PAC-IF052B
47 FTC4 Installation Manual
IN1 TBI.1 1-2 Room thermostat 1 input Refer to SW2-1 Refer to SW2-1
IN2 TBI.1 3-4 Flow switch 1 input Refer to SW2-2 Refer to SW2-2
IN3 TBI.1 5-6 Flow switch 2 input (Zone 1) Refer to SW3-2 Refer to SW3-2
IN4 TBI.1 7-8 Demand control input Normal Heat source OFF/Boiler
operation *
2
IN5 TBI.1 9-10 Outdoor thermostat input (* 1 ) Standard operation Heater operation/Boiler
operation * 2
IN6 TBI.1 11-12 Room thermostat 2 input Refer to SW3-1 Refer to SW3-1
IN7 TBI.1 13-14 Flow switch 3 input (Zone 2) Refer to SW3-3 Refer to SW3-3
Name Terminal Function OFF (Open) ON (Short)
TH1 - CN20 Thermistor (Room temp) *
1
PAC-SE41TS-E
TH2 - CN21 Thermistor (Ref liquid temp) * 2 -
THW1 - CNW12 1-2 Thermistor (Flow water temp) -
THW2 - CNW12 3-4 Thermistor (Return water temp) -
THW5 - CNW5 Thermistor (DHW tank water temp) *
1
PAC-TH011TK-E
THW6 TBI.2 7-8 - Thermistor (Zone1 flow water temp) * 1 PAC-TH011-E
THW7 TBI.2 9-10 - Thermistor (Zone1 return water temp)*
1
THW8 TBI.2 1-2 - Thermistor (Zone2 flow water temp) *
1
PAC-TH011-E
THW9 TBI.2 11-12 - Thermistor (Zone2 return water temp)* 1
THWB1 TBI.2 3-4 - Thermistor (Boiler flow water temp)*
1
PAC-TH011HT-E
Name Terminal Connector Item Optional Part
Signal input wire Use sheathed vinyl coated cable
Maximum 10m
Wire type: CV, CVS or equivalent
Wire size: Stranded wire 0.5mm
2
to 1.25mm
2
Switch (or Thermostat) Non voltage ‘a’ contact signals
Remote switch: Minimum applicable load 12V DC, 1mA
Name ON (Short)