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Wireless Pneumatic Thermostat- WPT-800 Series
1
Overview
The Cypress Envirosystems Wireless Pneumatic Thermostat (WPT) retrofits an
existing pneumatic thermostat to provide Direct Digital Control (DDC) like zone
control functionality at a fraction of the time and cost without disturbing occupants.
The WPT enables remote monitoring of zone temperature, branch pressure, remote
control of setpoints, and programmable setback or setup of the pneumatic HVAC
systems. It also enables integration with utility Demand Response programs.
The WPT can function either as a standalone system or can be integrated with an
existing Building Management System via BACnet/IP. As a result, the WPT helps a
building owner and tenants save energy by implementing indoor temperature policies,
improve comfort, and reduce the maintenance cost of the legacy pneumatic HVAC
systems.
1.1
Components
The WPT- 800 Series kit includes the following components:
•
WPT
•
Universal Wall Bracket
•
Mounting screws, #6 x 1" self-tapping (x2)
•
Wall Anchors
•
CR123 batteries (x2)
1.2
Prerequisites for Installation
The WPT relies on a wireless network for communication unless operating in a
standalone mode. When using the WPT in a standalone mode, these prerequisites
may be skipped. Before installing the WPT, the wireless network must be set up.
The following tasks must be completed before proceeding to WPT installation:
•
Installation of WPT Green Box and USB Hub (HUSB)
•
Installation of WPT Repeaters (RWAL)
•
Assignment of a network ID to the Green Box
•
Assignment of a unique node ID to each WPT and/or WPT in the network
Manuals for the WPT Green Box, HUSB, and repeaters can be found at
http://www.cypressenvirosystems.com/wpt-downloads.php.
1.3
Tools Required for Installation
•
# 1 Philips-head screwdriver
•
1/16" hex Allen wrench
•
3/16" Drill (for setting Wall Anchor, if required)
2
WPT Installation
The overall WPT installation procedure includes:
•
Mounting the WPT on the wall
WPT Installation Manual
Document No. 910-00005-01, Rev 17
Page 1 of 19
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Troubleshooting
Related Manuals for Cypress WPT-800 Series
Summary of Contents for Cypress WPT-800 Series
- Page 1 Document No. 910-00005-01, Rev 17 Wireless Pneumatic Thermostat- WPT-800 Series Overview The Cypress Envirosystems Wireless Pneumatic Thermostat (WPT) retrofits an existing pneumatic thermostat to provide Direct Digital Control (DDC) like zone control functionality at a fraction of the time and cost without disturbing occupants.
- Page 2 WPT Installation Manual Document No. 910-00005-01, Rev 17 • Configuring the WPT • Calibrating the WPT Mounting the WPT 2.1.1 Remove the Existing Thermostat Remove the external cover of the existing thermostat, if any. Locate and remove the mounting screws and carefully remove the unit from the wall along with the attached pneumatic tubes.
- Page 3 WPT Installation Manual Document No. 910-00005-01, Rev 17 Thermostat Lever Handling Precautions • Great care must be exercised while calibrating the WPT. • Handle the thermostat lever as little as possible. • Use extreme caution not to allow the lever to rotate sideways while adjusting the setscrew.
- Page 4 WPT Installation Manual Document No. 910-00005-01, Rev 17 Unscrew these two screws to Dismount wall bracket from rear side Figure 3. Removing the Universal Wall Bracket Adjust the Universal Wall Bracket against the old thermostat position, such that any two slots on the wall bracket match the existing two screw holes on the wall, and the large center opening is aligned with the air tube(s).
- Page 5 WPT Installation Manual Document No. 910-00005-01, Rev 17 Figure 5. Mounting the Universal Wall Bracket Connect the branch and main tubes to the air tubes marked B and M on the rear of the WPT, as shown in Figure 6. Connect the pneumatic tube to the M port in case of single pipe WPT.
- Page 6 WPT Installation Manual Document No. 910-00005-01, Rev 17 Figure 7. WPT Batteries 2.1.3 Installing/Replacing Batteries Replace battery with Type CR123A, that meet UL-1642, as evidenced by UL component recognition mark, only (from Panasonic, Energizer or Duracell). Use of any other battery may present a risk of fire or explosion. See Figure 7 for correct polarity.
- Page 7 WPT Installation Manual Document No. 910-00005-01, Rev 17 Figure 8. WPT Menu Structure Page 7 of 19...
- Page 8 Programming Mode Password A password is required to enter the Programming Mode. After pressing all three buttons simultaneously, the following screen will appear: Contact Cypress The password is a series of button presses: “OVR”,”OVR”,” ▲”, “▼”, “OVR” Envirosystems for passwords 2.2.2...
- Page 9 WPT Installation Manual Document No. 910-00005-01, Rev 17 2. Press the ▲ or ▼ button to change the network ID to the required value. NOTE: The network ID cannot have a “0” value. 3. Press OVR to confirm the network ID. This completes the programming of the network ID and the LCD displays the first digit, D1, of the node ID.
- Page 10 WPT Installation Manual Document No. 910-00005-01, Rev 17 1. From the home screen, press all three buttons simultaneously to enter “Programming Mode” and enter the password (see section 2.2.1 ). 2. Press the OVR button 5 times to navigate past the Network and Node ID programming screen and into the Celsius/Fahrenheit screen.
- Page 11 WPT Installation Manual Document No. 910-00005-01, Rev 17 3. Use a 1/16” hex Allen wrench and very carefully turn the calibration set screw on the thermostat lever, shown in Figure 14, until the branch pressure is equal to the desired control point. Use extreme caution not to allow the lever to rotate sideways while adjusting the setscrew.
- Page 12 WPT Installation Manual Document No. 910-00005-01, Rev 17 Friction Clip Control Lever Figure 15. Friction Clip and Control Lever 4. When the desired control pressure is achieved, press the OVR button to exit and save the value. • A confirmation screen will appear and flash the stored control pressure for 3 seconds.
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Page 13: Operation
WPT Installation Manual Document No. 910-00005-01, Rev 17 Operation The various indicators and characters that are displayed on the LCD display are shown in the Figure 16. Figure 16. LCD Display The front panel of the LCD display is used to perform the following functions: •... - Page 14 WPT Installation Manual Document No. 910-00005-01, Rev 17 During Occupancy Override, the setpoint will revert to the last “Occupied” value as commanded by the server. During the override duration, the LCD displays the OVR indicator. Measuring the Branch Line Pressure To measure the branch line pressure: •...
- Page 15 WPT Installation Manual Document No. 910-00005-01, Rev 17 Checking Signal Strength Each WPT attempts to find a primary and secondary wireless path back to the HUB. The paths and associated signal strengths (1-5) from the WPT are displayed in the “dt”...
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Page 16: Troubleshooting
WPT Installation Manual Document No. 910-00005-01, Rev 17 Troubleshooting The WPT is designed with diagnostic functions to detect and diagnose faults. Code Cause Possible Solution Indicates that the WPT is performing a discovery This indication disappears automatically operation and it should not after a few seconds. -
Page 17: Additional Troubleshooting
3. Remove the branch line and verify that air is coming out. If possible, measure the pressure – this requires an additional pressure gauge (not provided by Cypress) connected to the line. The pressure should build up to the main pressure. - Page 18 WPT Installation Manual Document No. 910-00005-01, Rev 17 Rubber Port Cap below Hose on Port Stub Figure 18. 2 Pipe Thermostat Port Cap Repair Except for the batteries, the WPT does not have any field replaceable or repairable parts. Contact the original distributor of the unit for repair or warranty service. NOTE: Care should be taken to keep the unit dust-free during installation.
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Page 19: Technical Specification
95%RH Max, Noncondensing Length: 5.6 in (141 mm ) Dimensions Width: 4.1 in (104 mm ) Depth: 2.1 in (53 mm ) Cypress Envirosystems 198 Champion Court San Jose, CA 95134, USA info@cypressenvirosystems.com Phone: +1 (408) 943-2800 Page 19 of 19...
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