Carrier 50PCH Field-SuppliedSensors for, WSHP Open Controller, SPT Sensors, a50-8443, Rnet Wiring

WSHP OPEN WIRING — The WSHP Open controller will be factory wired to the Complete C or Deluxe D control board, however, the system wiring will need to be completed utilizing WSHP Open controller wiring diagrams and the Third Party Integration (TPI) Guide. Factory installation includes harness, LWT (leaving water temperature), supply air, and condensate sensor.

WARNING

Disconnect all power to the unit before performing mainte- nance or service. Unit may automatically start if power is not disconnected. Failure to follow this warning could cause personal injury, death, and/or equipment damage.

Wiring Sensors to Inputs — Sensors can be wired to the WSHP Open controller’s inputs. See Table 4.

All field control wiring that connects to the WSHP Open con- troller must be routed through the raceway built into the corner post. The raceway provides the UL required clearance between high and low-voltage wiring.

1.Pass control wires through the hole provided in the corner post.

2.Feed the wires through the raceway to the WSHP Open controller.

3.Connect the wires to the removable Phoenix connectors.

4.Reconnect the connectors to the board.

Field-Supplied Sensor Hardware — The WSHP Open con- troller is configurable with the following field-supplied sen- sors. See Table 4.

Table 4 — Field-Supplied Sensors for

WSHP Open Controller

SENSOR	NOTES
Space Temperature Sensor	Field Installed (Must be used with
(SPT)	WSHP Open controller.)
Outdoor Air	Network Sensor
Temperature Sensor
Indoor Air Quality Sensor	Required only for demand
(Separate Sensor)	control ventilation.
Space Relative Humidity	Separate Sensor
Sensor

NOTE: BACview6 Handheld or Virtual BACview can be used as the user interface.

For specific details about sensors, refer to the literature sup- plied with the sensor.

Wiring a SPT Sensor — A WSHP Open controller is connect- ed to a wall-mounted space temperature (SPT) sensor to moni- tor room temperature using a Molex plug.

The WSHP Open system offers the following SPT sensors. See Table 5.

Wire SPT sensors to the WSHP Open controller’s Rnet port. An Rnetbus can consist of any of the following combina- tions of devices wired in a daisy-chain configuration:

•1 SPT Plus, SPT Pro, or SPT Pro Plus sensors

•1 to 4 SPT Standard sensors

•1 to 4 SPT Standard sensors and 1 SPT Plus, SPT Pro, or SPT Pro Plus sensor

•Any of the above combinations, plus up to 2 BACview6 Handheld but no more than 6 total devices

NOTE: If the Rnetbus has multiple SPT Standard sensors, each sensor must be given a unique address on the Rnetbus. See the Carrier Open Sensor Installation Guide.

Use the specified type of wire and cable for maximum signal integrity. See Table 6.

Table 5 — SPT Sensors

SENSOR	PART	FEATURES
	NUMBER
SPT	SPS	• Local access port
Standard		• No operator control
		• Slide potentiometer to adjust set point
SPT Plus	SPPL	• Manual on button to override schedule
		• LED to show occupied status
		• Local access port
		• LCD display
		• Manual on button to override schedule
		• Warmer and cooler buttons to adjust set
SPT Pro	SPP	point
		• Info button to cycle through zone and
		outside air temperatures, set points, and
		local override time
		• Local access port
		• LCD display
		• Manual on button to override schedule
		• Warmer and cooler buttons to adjust set
SPT Pro		point
	SPPF	• Info button to cycle through zone and
Plus
		outside air temperatures, set points, and
		local override time
		• Local access port
		• Fan speed*

*The SPT Pro Plus fan speed adjustment has no effect in this application.

Table 6 — Rnet Wiring Specifications

RNET WIRING SPECIFICATIONS

Description	4 conductor, unshielded, CMP,
	plenum rated cable
Conductor	18 AWG
Maximum Length	500 ft
Recommended Coloring	Jacket: white
	Wiring: black, white, green, red
UL Temperature	32 to 167 F
Voltage	300-vac, power limited
Listing	UL: NEC CL2P, or better
LEGEND

AWG — American Wire Gage

CMP — Communications Plenum Cable

NEC — National Electrical Code

UL — Underwriters Laboratories

To wire the SPT sensor to the controller:

1.Partially cut, then bend and pull off the outer jacket of the Rnet cable(s), being careful not to nick inner insulation.

2.Strip about 1/4 in. of the inner insulation from each wire. See Fig. 27.

OUTER JACKET

a50-8443

.25 IN. INNER INSULATION

Fig. 27 — Rnet Cable Wire

3.Wire each terminal on the sensor to the same terminal on the controller. See Fig. 18-20. Table 7 shows the recom- mended Rnet wiring scheme.

Table 7 — Rnet Wiring

WIRE	TERMINAL
Red	+12-v
Black	.Rnet–
White	Rnet+
Green	Gnd

NOTE: The wire should be connected to the terminal shown.

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