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RTU Open v3
Carrier RTU Open v3 User Manual
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Installing
the RTU Open
RT
U O
pe
n v3
CARRIER CORPORATION ©
2019
Installat
ion and St
art
-
up
Gui
de
All rights reserved
13
Wiring
inpu
ts an
d outp
uts
RTU O
pen Inputs a
nd Out
puts Ta
ble
Channel
Number
Type
Signal
Function
Part
Number
Wire a
nd
Termin
al
Number
s
Altern
ate
Termin
als
Input 1
AI
4-
20 mA
CO2
OAQ
Space
Relative
Humidit
y
33ZCT55C
O2 33ZCT56CO2
33ZCSPTCO2
-
01
33ZCSPTCO2LC
D-
01
w/ 33ZCASPCO2
33ZCSENSRH
-
02
J4
-
5 &
6
N/A
Input 2
AI
4-
20 mA
CO2
OAQ
Space
Relative
Humidit
y
33ZCT55C
O2 33ZCT56CO2
33ZCSPTCO2
-
01
33ZCSPTCO2LCD
-
01
w/ 33ZCASPCO2
33ZCSENSRH
-
02
J4
-
2 & 3
N/A
Input 3
BI
24 Vac
Compress
or Safe
ty **
2
Fan Stat
us
Fil
ter Statu
s
Remote Occupancy
Door Con
tact
N/A
CRSTATUS005A00
CRSTATUS005A00
Field
-
sup
plied
Field
-
sup
plied
J1
-
2
J5
-
5 & 6 ***
Input 4
BI
24 Vac
Safety
Chain
*
N/A
J1
- 9
N/A
Input 5
BI
24 Vac
Fire Shutdown **
1,
2
Fan Stat
us
Filter S
tatus
Remote Occupan
cy
Door Con
tact
Field
-
sup
plied
CRSTATUS005A00
CRSTATUS005A00
Field
-
sup
plied
Field
-
sup
plied
J1
-
10
J5
-
3 & 4 ***
Input 6
AI
10K
Ther
mistor
Supply
Air T
emperature
33ZCSENSAT
33ZCSENDAT
J2
-
1 & 2
N/A
Input 7
AI
10K
Ther
mistor
Outside Air Temperature
33Z
CS
ENO
AT
J2
-
3 & 4
N/A
Input 8
BI
24 Vac
Enthalp
y **
Fan Stat
us
Filter S
tatus
Remote Occupancy
Door Con
tact
33SENTHSW
CRSTATUS005A00
CRSTATUS005A00
Field
-
sup
plied
Field
-
sup
plied
J2
-
6 &
7
J5
-
1 & 2 ***
Input 9
BI
24 Vac
IGC Input****
Humidist
at **
Fan
Status
Filter S
tatus
Remote Occupancy
Door Con
tact
--
HL
--
38MG
-
029
CRSTATUS005A00
CRSTATUS005A00
Field
-
sup
plied
Field
-
sup
plied
J5
-
7 & 8
N/A
Input 10
AI
10K
Ther
mistor
Space Tem
perature
33ZCT55SPT 33ZCT56S
PT
33ZCT59SPT
J20
-
1 & 2
N/A
Input 11
AI
100K
T
he
rmi
st
or
Space Tem
perature
Setpoint
Adjust
33ZCT56SPT 33ZCT59S
PT
J20
-
3 & 4
N/A
Rnet
AI
ZS sensors
Wireless Adapter for
wireless sensors
Equipment T
ouch
TruVu™
ET Disp
lay
See Wiring devic
es to the Rnet
port.
J13
-
1, 2, 3,
4
N/A
AO
- 1
AO
4-
20 mA
Ec
onomizer
Actua
tor
-
Field
-
supplied
J2
-
5 & 4
N/A
16
18
Table of Contents
Table of Contents
3
Introduction
5
What Is the RTU Open Controller
5
Specifications
7
Safety Considerations
8
Installing the RTU Open
9
Field-Supplied Hardware
9
To Mount the RTU Open
10
To Wire the Controller for Power
11
To Use the Rooftop Equipment Control Power Transformer
12
To Use an Auxiliary Control Power Transformer
13
To Set the Controller's Address
15
To Set the Controller's Communications Protocol and Baud Rate
15
Wiring for Communications
16
Wiring Specifications for Bacnet MS/TP and ARC156
16
To Wire the Controller to the Bacnet Network
16
Wiring Inputs and Outputs
17
Input Wiring Specifications
18
Inputs
19
Binary Outputs
19
Analog Outputs
19
To Wire Inputs and Outputs
20
Wiring Sensors and Switches to the Controller
24
Field-Supplied Sensor Hardware
25
Wiring Devices to the RTU Open's Rnet Port
26
Wiring a Supply Air Temperature Sensor
31
Wiring a Duct Air Temperature Sensor
32
Wiring an Outdoor Air Temperature Sensor
33
Wiring a CO2 Sensor
34
Wiring an Outdoor Air Quality Sensor
36
Wiring a Relative Humidity Sensor
37
Wiring a Humidistat
38
Wiring an Enthalpy Switch
39
Wiring a Status Switch
41
Wiring a Compressor Safety
42
Wiring an Occupancy Switch or Door Contact
43
Start-Up
45
Service Test
45
Configuring the RTU Open's Properties
47
Sequence of Operation
48
Occupancy
48
Supply Fan
49
Cooling
49
Economizer
50
Power Exhaust
51
Pre-Occupancy Purge
52
Unoccupied Free Cooling
52
Optimal Start
52
Enthalpy Control
54
Indoor Air CO2
54
Heating
55
Heat Pump Operation
55
Dehumidification
56
Demand Limiting
56
Door Switch
56
Remote Occupancy
57
Fire Shutdown
57
Compressor Safety
57
Fan Status
57
Filter Status
58
Alarms
58
Linkage
60
Linkage Air Source Mode Determination
62
Troubleshooting
63
Communication Led's
63
To Get the Serial Number
64
To Replace the RTU Open's Battery
64
Compliance
65
FCC Compliance
65
CE Compliance
65
Bacnet Compliance
65
Appendix A: RTU Open Points/Properties in I-Vu®/Field Assistant
66
Status
66
Unit Configuration
67
Setpoints
74
Alarm Configuration
80
Service Configuration
82
Maintenance
86
Performance
89
Alarms
90
Linkage
92
I/O Points
93
Appendix B: Single Point Linkage and Device Address Binding
95
Single Point Linkage
95
Device Address Binding
96
Appendix C: RTU Open Points/Properties on the Equipment Touch
97
Navigation Screens
97
Startup Wizard
99
Status - Equipment Touch
101
Unit Configuration - Equipment Touch
102
Setpoints - Equipment Touch
104
Alarm Configuration - Equipment Touch
105
Maintenance - Equipment Touch
106
Performance - Equipment Touch
108
Alarms - Equipment Touch
108
Document Revision History
111
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Carrier RTU Open v3 Specifications
General
Brand
Carrier
Model
RTU Open v3
Category
Controller
Language
English
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