Bes-Tech DigiRTU

Bes-Tech · Digi-RTU

Manufacturer: Bes-Tech
Product: Digi-RTU
Protocol: Modbus
Package: Temperature control (SU2203)
Updated: 2023-11-13
Driver ID: 208

Notes

The Digi-RTU is a Heating, Ventilation, and Air Conditioning (HVAC) rooftop unit control kit that is both a demand management and energy usage device. It is designed to improve the energy efficiency and demand requirements of a rooftop unit as well as solve the humidity, common noise, and frequent on/off issues of a rooftop unit through modulating the capacity of a rooftop unit to match the cooling or heating space requirements.

Connect
R25/+/Red -> ezeio D1
R25/-/Black -> ezeio D0
R25/0/White -> ezeio 0V/gnd

Registers 81

#	Name	Unit
1	Indoor fan call from T-stat or BAS
2	Cooling call from T-stat or BAS
3	Heating call from T-stat or BAS
4	Outside air temperature (Digi-RTU sensor)	`°F`
5	Outside air relative humidity (Digi-RTU sensor)	`%`
6	Supply air temperature (Digi-RTU sensor)	`°F`
7	Return air CO2 concentration Digi-RTU sensor)	`ppm`
8	Return air or room air temperature (Digi-RTU sensor)	`°F`
9	Return air relative humidity (Digi-RTU sensor)	`%`
10	Fan command to fan contactor or VFD
11	Power exhaust fan command
12	On/off command to the first compressor in the first circuit
13	On/off command to the first compressor in the second circuit
14	On/off command to the second compressor in the first circuit
15	On/off command to the second compressor in the second circuit
16	On/off command to the first stage heater
17	On/off command to the second stage heater
18	Outside air damper command	`%`
19	Supply fan speed command	`Hz`
20	Supply fan speed feedback	`Hz`
21	Supply fan power	`kW`
22	Compressor speed command	`Hz`
23	Compressor speed feedback for the first compressor in the first circuit	`Hz`
24	Compressor power for the first compressor in the first circuit	`kW`
25	Compressor speed feedback for the first compressor in the second circuit	`Hz`
26	Compressor power for the first compressor in the second circuit	`kW`
27	Overrride to the indoor fan on/off
28	Override to the first stage heater on/off
29	Override to the second stage heater on/off
30	Overrride to the first compressor in the first circuit on/off
31	Overrride to the first compressor in the second circuit on/off
32	Overrride to the second compressor in the first circuit on/off
33	Overrride to the second compressor in the second circuit on/off
34	Overrride to the supply fan speed
35	Override to the compressor speed
36	Override to the outside air damper position
37	Digi-RTU ID for Modbus communication with BAS
38	Activate the new setting/address
39	System type (RTU or HP)
40	System configuration: 1/1; 1/2; 2/2; 2/3; and 2/4
41	Stacked or entwined
42	Economizer enbaled or disabled
43	Heat pump reversing valve type
44	Number of compressor VFDs
45	VFD brand for supply fan
46	Maximum output to supply fan VFD	`mV`
47	VFD speed corresponding to the maximum input to the VFD	`Hz`
48	Minimum output to supply fan VFD	`mV`
49	VFD speed corresponding to the minimum input to the VFD	`Hz`
50	Fan only speed setpoint	`Hz`
51	VFD brand for the first compressor VFD
52	VFD brand for the second compressor VFD
53	Compressor VFD maximum output	`mV`
54	Compressor VFD speed corresponding to the maximum output	`Hz`
55	Compressor VFD minimum output	`mV`
56	Compressor VFD speed corresponding to the minimum output	`Hz`
57	Compressor VFD minimum speed limit	`Hz`
58	Supply air temperature setpoint for cooling	`°F`
59	Supply air temperature setpoint for economizer operation	`°F`
60	Supply air temperature setpoint for heating	`°F`
61	Return air temperature low limit for cooling	`°F`
62	Lock out outside air temperature for compressors	`°F`
63	Economizer high outside air temperature limit	`°F`
64	Economizer low outside air temperature limit	`°F`
65	Enthalpy economizer outside air enthalpy cutoff value
66	Minimum output to the outside air damper	`mV`
67	Maximum output to the outside air damper	`mV`
68	Minimum outside air damper position	`%`
69	Return air temeprature sensor type
70	Supply air temperature sensor type
71	Outside air temeprature sensor type
72	Communication faults
73	Economizer fault
74	Heating fault
75	Supply fan fault
76	Compressor fault
77	Condensor fault
78	Evaporator fault
79	Low charge fault
80	Temperature sensor fault
81	CO2 sensor fault

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