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 |
| |
| 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 the inner insulation.
2.Strip about 1/4 in. of the inner insulation from each wire. See Fig. 34.
OUTER JACKET
a50-8443
.25 IN. | INNER INSULATION |
Fig. 34 — Rnet Cable Wire
3.Wire each terminal on the sensor to the same terminal on the controller. See Fig.
Table 7 — Rnet Wiring
WIRE | TERMINAL |
Red | |
Black | .Rnet– |
White | Rnet+ |
Green | Gnd |
NOTE: The wire should be connected to the terminal shown.
Wiring a Supply Air Temperature (SAT) Sensor — The SAT sensor is required for reheat applications.
If the cable used to wire the SAT sensor to the controller will be less than 100 ft, an unshielded 22 AWG (American Wire Gage) cable should be used. If the cable will be greater than 100 ft, a shield 22 AWG cable should be used. The cable should have a maximum length of 500 ft.
To wire the SAT sensor to the controller:
1.Wire the sensor to the controller. See Fig.
2.Verify that the Enable SAT jumper is on.
3.Verify that the Enable SAT and Remote jumper is in the left position.
Wiring an Indoor Air Quality (IAQ) Sensor — An IAQ sensor monitors CO2 levels. The WSHP Open controller uses this information to adjust the
The sensor has a range of 0 to 2000 ppm and a linear 4 to
20 mA output. This is converted to 1 to 5 vdc by a
NOTE: Do not use a relative humidity sensor and CO2 sensor on the same zone controller if both sensors are powered off the board. If sensors are externally powered, both sensors may be used on the same zone controller.
If the cable used to wire the IAQ sensor to the controller will be less than 100 ft, an unshielded 22 AWG (American Wire Gage) cable should be used. If the cable will be greater than 100 ft, a shield 22 AWG cable should be used. The cable should have a maximum length of 500 ft.
To wire the IAQ sensor to the controller:
1.Wire the sensor to the controller. See Fig.
2.Install a
3.Verify the the RH/IAQ jumper is set to 0 to
Wiring a Relative Humidity (RH) Sensor — The RH sensor is used for zone humidity control (dehumidification) if the WSHP unit has a dehumidification device. If not, the sensor only monitors humidity.
NOTE: Do not use a relative humidity sensor and CO2 sensor on the same zone controller if both sensors are powered off the board. If sensors are externally powered, both sensors may be used on the same zone controller.
If the cable used to wire the RH sensor to the controller will be less than 100 ft, an unshielded 22 AWG (American Wire Gage) cable should be used. If the cable will be greater than 100 ft, a shield 22 AWG cable should be used. The cable should have a maximum length of 500 ft.
To wire the RH sensor to the controller:
1.Strip the outer jacket from the cable for at least 4 inches.
2.Strip 1/4 in. of insulation from each wire.
3.Wire the sensor to the controller.
Step 6 — Install Supply and Return Piping
CAUTION
To ensure proper functioning of unit and system, be sure to connect entering water to upper pipe on
SUPPLY AND RETURN HOSES — Optional
1.Install supply and return hoses fitted with
2.Use male adapters to secure the hose assembly to the unit and the riser.
3.Do not allow the hose to twist during installation. Twist- ing may damage the hose wall or the rubber compound.
4.Use pipe joint compound sparingly on the fitting adapt- ers’ male pipe threads.
5.Prevent sealant from reaching the joint’s flared surfaces.
6.Do not use pipe joint compound when Teflon* thread tape is
7.Maximum torque that may be applied to brass fittings is 30
8.Tighten steel fittings as necessary.
9.Use
SUPPLY AND RETURN PIPING — System piping MUST comply with all applicable codes.
1.Install a drain valve at the base of each supply and return riser to enable system flushing at
*Teflon is a trademark of E. I. du Pont de Nemours and Company.
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