Midea HD-Y388 Instructions

Room Thermostat HD-Y388

SPECIFICATIONS

Set-point Range: 5°C to 35°C(Adaptable)
Display Accuracy: ± 1°C
Switch Current Rating: < 3A
Sensing Element : NTC

MOUNTING

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.

WIRING DIAGRAMS

HD-Y3 8B 8
to control fan coil only
L(Phase,220VAC)
1
2
3
LOW
4
MED
5
FC
HI
6
7
N(Neutral,220VAC)
8
HD-Y3 8F 8
to control 2-position damper actuator
L(Phase,220VAC)
1
open
2
air
damper
close
3
actuator
4
5
6
7
N(Neutral,220VAC)
8
Display: Large Screen LCD
Power Supply: 220VAC ±15% 50/60 Hz
Dimensions: 86 × 86 × 13.5 mm
Housing: Flame Retarding PC
HD-Y3 8DA/DB 8
to control fan coil with 3-wire
motorised valve
N L
L(Phase,220VAC)
1
2
3
LOW
4
MED
5
HI
6
7
N(Neutral,220VAC)
8
8
HD-Y3 8F
to control 0 30 60 90 damper actuator
N
L
L(Phase,220VAC)
1
2
0
3
30
4
60
5
90
6
7
N(Neutral,220VAC)
8
See overleaf for further operating instructions
Page 1
N
L
3-wire valve
FC
N
L
air
damper
actuator
HD-Y3 8DA/DB 8
to control fan coil with 2-wire
motorised valve
N
L(Phase,220VAC)
1
2
2-wire valve
3
LOW
4
MED
5
FC
HI
6
7
N(Neutral,220VAC)
8
HD-Y3 8S 8
to control 4-pipe fan coil with 3-wire
motorised valve
L(Phase,220VAC)
1
2
3
3-wire valve
4
5
3-wire valve
LOW
6
MED
7
FC
HI
8
N(Neutral,220VAC)
9
L
N
L