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Set-point Range: 5°C to 35°C(Adaptable)
Display Accuracy:
± 1°C
Switch Current Rating: < 3A
Sensing Element : NTC
Display: Large Screen LCD
Power Supply: 220VAC ±15% 50/60 Hz
Dimensions: 86 × 86 × 13.5 mm
Housing: Flame Retarding PC
SPECIFICATIONS
WIRING DIAGRAMS
1. The thermostat is flush mount, a back box of ideally 45mm depth should be sunk into the wall prior to installation.
2. Installation should be carried out by a qualified electrician.
3. Choose a location about 5 feet(1.5 meter) above the floor with good air circulation.
4. To avoid electrical shock and to prevent damage to the furnace, air conditioner, and thermostat, disconnect the
power supply before beginning work. This can be done at the fuse box, at the circuit breaker, or at the appliance.
MOUNTING
See overleaf for further operating instructions
HD-Y3 8B
to control fan coil only
1
2
3
4
5
6
7
8
FC
L
L(Phase,220VAC)
N(Neutral,220VAC)
LOW
MED
HI
N
HD-Y3 8DA/DB
to control fan coil with 3-wire
motorised valve
1
2
3
4
5
6
7
8
FC
L
L(Phase,220VAC)
N(Neutral,220VAC)
LOW
MED
HI
N
3-wire valve
HD-Y3 8DA/DB
to control fan coil with 2-wire
motorised valve
1
2
3
4
5
6
7
8
FC
L
L(Phase,220VAC)
N(Neutral,220VAC)
LOW
2-wire valve
MED
HI
N
HD-Y3 8F
to control 2-position damper actuator
HD-Y3 8F
to control 0 30 60 90 damper actuator
1
2
3
4
5
6
7
8
air
damper
actuator
L
L(Phase,220VAC)
N(Neutral,220VAC)
N
0
30
60
90
1
2
3
4
5
6
7
8
L
L(Phase,220VAC)
open
close
N(Neutral,220VAC)
N
air
damper
actuator
HD-Y3 8
S
to control
4-pipe
fan coil with 3-wire
motorised valve
1
2
3
4
5
6
7
8
FC
L
L(Phase,220VAC)
N(Neutral,220VAC)
LOW
MED
HI
N
3-wire valve
9
3-wire valve
8
8
8
8
8
8
Room Thermostat HD-Y388
