Belimo
ZTH-EU-A
ZTH Series • HVAC Controller
Quick Info
Type
HVAC
Application
VAV Control
Probe Inputs
2
Relay Outputs
1
Communication
BACnet MS/TP
Panel Size
- mm
VAV room controller with integrated actuator connection
Technical Specifications
Display & Interface
| Display Type | LED indicators |
| Display Digits | - |
| Buttons | 2 |
Power Supply
| Voltage | 24V AC |
| Voltage Range | 20-30V AC |
| Frequency | 50/60Hz |
| Power Consumption | 4VA |
Sensor Inputs
| Probe Inputs | 2 |
| Probe Type | NTC 10K / 0-10V |
| Temp Range | 0 to 50°C |
| Accuracy | ±±0.5°C |
Relay Outputs
| Relay Outputs | 1 |
| Relay Rating | 2A/24VAC |
Physical
| Panel Size | - mm |
| Depth | - mm |
| IP Rating | IP20 |
Operating Conditions
| Operating Temp | 0 to 50°C |
Wiring Terminals
| Terminal | Function | Type | Wire Color |
|---|---|---|---|
| 24V AC | Power |
power
|
|
| AC Common | Power |
power
|
|
| Room Temp Sensor | Input |
sensor
|
|
| Airflow/Pressure Input | Input |
sensor
|
|
| Damper Output (0-10V) | Output |
analog
|
|
| BACnet | Communication |
comm
|
Important: Always disconnect power before wiring. Verify terminal numbers with the actual controller label before connecting.
Parameter Settings
| Code | Parameter | Range | Default | Description |
|---|---|---|---|---|
| SP | Temperature Set Point | 15~30 | 22 °C | |
| Vmin | Min Airflow | 0~100 | 20 % | |
| Vmax | Max Airflow | 0~100 | 100 % | |
| Kp | Proportional Gain | 0.1~10 | 2 | |
| Ti | Integral Time | 0~600 | 120 sec |
Error Codes
Sen