Air-Sys ASMUC HVAC controller
Manufacturer: Air-Sys
Product: ASMUC
Model: Single zone
Class: MODBUS
Updated: 2026-08-26
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Registers
| # | Name | Unit | Description |
|---|---|---|---|
| 1 | Number of units | # | |
| 2 | Outdoor temp | °F | |
| 3 | Room temp | °F | |
| 4 | Room humidity | %RH | |
| 37 | Main set point (WRITABLE) | °F | |
| 13 | HVAC 1 Status | . | |
| 5 | HVAC 1 supply temp | °F | |
| 9 | HVAC 1 return temp | °F | |
| 17 | HVAC 1 fan speed | % | |
| 21 | HVAC 1 damper pos | % | |
| 25 | HVAC 1 power | kW | |
| 29 | HVAC 1 alarms A | . | |
| 30 | HVAC 1 alarms B | . | |
| 14 | HVAC 2 Status | . | |
| 6 | HVAC 2 supply temp | °F | |
| 10 | HVAC 2 return temp | °F | |
| 18 | HVAC 2 fan speed | % | |
| 22 | HVAC 2 damper pos | % | |
| 26 | HVAC 2 power | kW | |
| 31 | HVAC 2 alarms A | . | |
| 32 | HVAC 2 alarms B | . | |
| 15 | HVAC 3 Status | . | |
| 7 | HVAC 3 supply temp | °F | |
| 11 | HVAC 3 return temp | °F | |
| 19 | HVAC 3 fan speed | % | |
| 23 | HVAC 3 damper pos | % | |
| 27 | HVAC 3 power | kW | |
| 33 | HVAC 3 alarms A | . | |
| 34 | HVAC 3 alarms B | . | |
| 16 | HVAC 4 Status | . | |
| 8 | HVAC 4 supply temp | °F | |
| 12 | HVAC 4 return temp | °F | |
| 20 | HVAC 4 fan speed | % | |
| 24 | HVAC 4 damper pos | % | |
| 28 | HVAC 4 power | kW | |
| 35 | HVAC 4 alarms A | . | |
| 36 | HVAC 4 alarms B | . |
Notes
Multi-unit HVAC control panel. This driver support singe-zone only and up to 4 HVAC units. Connects to the ezeio via Modbus/TCP. Default IP is 192.168.11.x where x is the HVAC number. Typically set this driver for address 17, which is the ASMUC controller itself. The ezeio IP address should be set to 192.168.11.88 with NetMask set to 255.255.255.0. Leave Gateway and DNS entries blank. NOTES: * Requires firmware version 2.1.085 or newer on the ASMUC controller * Assumes the system is set for imperial units (°F)