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39
Table 9 – RTU Open Controller Inputs and Outputs
POINT NAME
BACnet OBJECT
NAME
TYPE OF I/O
CONNECTION PIN
NUMBER(S)
DEDICATED INPUTS
Space Temp / Zone Temp
zone_temp
AI (10K Thermistor)
J20---1, 2
Supply Air Temperature
sa_temp
AI (10K Thermistor)
J2---1, 2
Outdoor Air Temperature
oa_temp
AI (10K Thermistor)
J2---3, 4
Space Temperature Offset Pot
stpt_adj_offset
AI (100K Potentiometer)
J20---3
Safety Chain Feedback
safety_status
DI (24 VAC)
J1---9
Compressor Safety Status
comp_status
DI (24 VAC)
J1---2
Fire Shutdown Status
firedown_status
DI (24 VAC)
J1---10
Enthalpy Status
enthalpy_status
DI (24 VAC)
J2---6
Humidistat Input Status
humstat_status
DI (24 VAC)
J5---7
CONFIGURABLE INPUTS
Indoor Air CO2
iaq
AI (4---20 ma)
J4---2 or J4---5
Outdoor Air CO2
oaq
AI (4---20 ma)
Space Relative Humidity
space_rh
AI (4---20 ma)
Supply Fan Status*
sfan_status
DI (24 VAC)
J5---1 or J5---3 or
J5 5 or J5---7
Filter Status*
filter_status
DI (24 VAC)
Door Contact Input*
door_contact_status
DI (24 VAC)
Occupancy Contact*
occ_contact_status
DI (24 VAC)
OUTPUTS
Economizer Output
econ_output
AO (4---20ma)
J2---5
Supply Fan Relay State
sfan
DO Relay (24VAC , 1A)
J1---4
Compressor 1 Relay State
comp_1
DO Relay (24VAC , 1A)
J1---8
Compressor 2 Relay State
comp_2
DO Relay (24VAC , 1A)
J1---7
Heat Stage 1 Relay State
heat_1
DO Relay (24VAC , 1A)
J1---6
Heat Stage 2 Relay State
heat_2
DO Relay (24VAC , 1A)
J1---5
Power Exhaust Relay State
pexh
DO Relay (24VAC , 1A)
J11---3
Dehumidification Relay State
dehum
DO Relay (24VAC, 1A)
J11---7, 8
LEGEND
AI
--- Analog Input
AO
--- Analog Output
DI
--- Discrete Input
DO
--- Discrete Output
* These inputs (if installed) take the place of the default input on the specific channel according to schematic.
Parallel pins J5---1 = J2---6, J5---3 = J1---10, J5---5 = J1---2 are used for field---installation.
The RTU Open controller requires the use of a Carrier
space sensor. A standard thermostat cannot be used with
the RTU Open system.
Supply Air Temperature (SAT) Sensor —
On FIOP--equipped 48HC unit, the unit is supplied with a
supply--air temperature (SAT) sensor (33ZCSENSAT). This
sensor is a tubular probe type, approx 6--inches (12.7 mm) in
length. It is a nominal 10--k ohm thermistor.
The SAT is factory--wired. The SAT probe is wire--tied to the
supply--air opening (on the horizontal opening end) in its
shipping position. Remove the sensor for installation.
Re--position the sensor in the flange of the supply--air
opening or in the supply air duct (as required by local
codes). Drill or punch a
1
/
2
--in. hole in the flange or duct.
Use two field--supplied, self--drilling screws to secure the
sensor probe in a horizontal orientation. See Fig. 40.
Outdoor Air Temperature (OAT) Sensor —
The OAT is factory--mounted in the EconoMi$er2 (FIOP or
accessory). It is a nominal 10k ohm thermistor attached to
an eyelet mounting ring.
EconoMi$er2 —
The RTU Open control is used with EconoMi$er2 (option
or accessory) for outdoor air management. The damper
position is controlled directly by the RTU Open control;
EconoMi$er2 has no internal logic device.
Outdoor air management functions can be enhanced with
field--installation of these accessory control devices:
Enthalpy control (outdoor air or differential sensors)
Space CO
2
sensor
Outdoor air CO
2
sensor
Field Connections
Field connections for accessory sensors and input devices
are made the RTU Open, at plugs J1, J2, J4, J5, J11 and
J20. All field control wiring that connects to the RTU
Open must be routed through the raceway built into the
corner post as shown in Fig. 31. The raceway provides the
UL required clearance between high-- and low--voltage
wiring. Pass the control wires through the hole provided in
the corner post, then feed the wires thorough the raceway
48H
C
Summary of Contents for 48TC*D
Page 3: ...3 C10896 Fig 1 Unit Dimensional Drawing 17 Size Unit 48HC...
Page 4: ...4 C10897 Fig 1 Unit Dimensional Drawing 17 Size Unit cont 48HC...
Page 5: ...5 C10892 Fig 2 Unit Dimensional Drawing 20 and 24 Size Units 48HC...
Page 6: ...6 C10893 Fig 2 Unit Dimensional Drawing 20 and 24 Size Units cont 48HC...
Page 7: ...7 C10900 Fig 3 Unit Dimensional Drawing 28 Size Unit 48HC...
Page 8: ...8 C10901 Fig 3 Unit Dimensional Drawing 28 Size Unit cont 48HC...
Page 11: ...11 C10954 Fig 6 Roof Curb Details 17 Size Unit 48HC...
Page 12: ...12 C10955 Fig 7 Roof Curb Details 20 and 24 Size Units 48HC...
Page 13: ...13 C10956 Fig 8 Roof Curb Details 28 Size Unit 48HC...
Page 27: ...27 C11140 Fig 38 PremierLink Wiring Schematic 48HC...
Page 28: ...28 C11141 Fig 39 PremierLink Wiring Schematic with Humidi MiZerR 48HC...
Page 37: ...37 C11142 Fig 58 RTU Open System Control Wiring Diagram 48HC...
Page 38: ...38 C11143 Fig 59 RTU Open System Control Wiring Diagram with Humidi MiZerR 48HC...
Page 51: ...51 48HC...