iVector S2
Installation manual
iVector S2 • 2022-07-01
US
A
5.7 LED Indications (A) 2 pipe & 4 pipe models with remote mounted thermostat
The circuit board in each unit has a green LED that indicates operational status and any fault conditions.
Green LED: Indicates that the unit is operational.
Flashing indicates a fault.
LED off: unit is off or has no power.
5.6 Connection of multiple units using remote-mounted thermostat
All functions of the fan coil can be controlled from a
remote-mounted thermostat, and up to a maximum of
30 units can be controlled from one thermostat with
simultaneous command to all units connected. The
operational parameters, temperature set point and
room temperature, are transmitted from the remote to
all connected units to give unified operation.
Electrical connection should be made using a suitable
two-core RS485 serial connection cable to terminals A
and B, and two power supply cables to terminals + and
–, keeping the power supply cables separate
• Where possible minimise the length of the leads used.
• Complete the installation with the 120Ω resistor
supplied, as shown.
• Do not make star connections
• The RS485 should be a shielded two-core cable with
a minimum thickness of 0.35mm.
• Ensure consistent wire connection to terminals A & B
at the unit and at the wall-mounted control
• Connect the leads from the + and – power terminals
on the wall mounted remote, 12V DC, to the unit circuit
boards, ensuring consistent wire connection at each end.
The 10 kΩ water temperature probe attached to the
heat exchanger controls fan operation. In heating the
fan will operate when the water temperature reaches
30°C (86 °F), and in cooling the fan will operate when
water temperature drops below 20°C (68 °F).
CP
L
+
A B
-
A A B B
-
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