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Deadband Wireless Pneumatic Thermostat- WPT-800-DB Series
1
Overview
The Cypress Envirosystems Deadband Wireless Pneumatic Thermostat (WPT-DB)
retrofits an existing pneumatic thermostat to provide Direct Digital Control (DDC) like
zone control functionality with a deadband at a fraction of the time and cost without
disturbing occupants.
The WPT-DB enables remote monitoring of zone temperature, branch pressure,
remote control of deadbands, and programmable setback or setup of the pneumatic
HVAC systems. It also enables integration with utility Demand Response programs.
The WPT-DB 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-DB helps
a building owner and tenants save energy by implementing indoor temperature
policies, and reduces the maintenance cost of the legacy pneumatic HVAC systems.
1.1
Components
The WPT-DB- 800 Series kit includes the following components:
•
WPT-DB
•
Universal Wall Bracket
•
Mounting screws, #6 x 1" self-tapping (x2)
•
Wall Anchors
•
CR123 batteries (x2)
1.2
Prerequisites for Installation
The WPT-DB relies on a wireless network for communication unless operating in a
standalone mode.
prerequisites may be skipped. Before installing the WPT-DB, the wireless network
must be set up. The following tasks must be completed before proceeding to WPT-
DB 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-DB 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-DB Installation
The overall WPT-DB installation procedure includes:
•
Mounting the WPT-DB on the wall
When using the WPT-DB in a standalone mode, these
WPT-DB Installation Manual
Document No. 910-00014-01, Rev. 04
Page 1 of 20
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Troubleshooting
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Related Manuals for Cypress Envirosystems WPT-800-DB Series
Summary of Contents for Cypress Envirosystems WPT-800-DB Series
- Page 1 Deadband Wireless Pneumatic Thermostat- WPT-800-DB Series Overview The Cypress Envirosystems Deadband Wireless Pneumatic Thermostat (WPT-DB) retrofits an existing pneumatic thermostat to provide Direct Digital Control (DDC) like zone control functionality with a deadband at a fraction of the time and cost without disturbing occupants.
- Page 2 WPT-DB Installation Manual Document No. 910-00014-01, Rev. 04 • Configuring the WPT-DB • Calibrating the WPT-DB Mounting the WPT-DB 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-DB Installation Manual Document No. 910-00014-01, Rev. 04 Thermostat Lever Handling Precautions • Great care must be exercised while calibrating the WPT-DB. • 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-DB Installation Manual Document No. 910-00014-01, Rev. 04 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-DB Installation Manual Document No. 910-00014-01, Rev. 04 Connect the branch and main tubes to the air tubes marked B and M on the rear of the WPT-DB, as shown in Figure 6. Connect the pneumatic tube to the M port in case of single pipe WPT-DB.
- Page 6 WPT-DB Installation Manual Document No. 910-00014-01, Rev. 04 • Dispose of used battery promptly in accordance with local regulations (place in plastic bag and recycle if possible). • Do not insert batteries with the polarities reversed. • Do not short-circuit. •...
- Page 7 WPT-DB Installation Manual Document No. 910-00014-01, Rev. 04 Figure 8. WPT-DB Menu Structure Page 7 of 20...
- Page 8 WPT-DB Installation Manual Document No. 910-00014-01, Rev. 04 2.2.1 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 password 2.2.2...
- Page 9 WPT-DB Installation Manual Document No. 910-00014-01, Rev. 04 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. NOTE: °...
- Page 10 WPT-DB Installation Manual Document No. 910-00014-01, Rev. 04 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-DB Installation Manual Document No. 910-00014-01, Rev. 04 Setting the Deadband Control Pressure The WPT-DB thermostat extends the functions of the conventional WPT thermostat by allowing a temperature range to be programmed where no heating or cooling takes place. This range is known as the Deadband. All pneumatic systems will have a neutral control pressure (control point), typically ~8psi, where the zone is neither heated nor cooled.
- Page 12 WPT-DB Installation Manual Document No. 910-00014-01, Rev. 04 • Press OVR four times. The LCD displays the branch pressure in PSI along with PRESSURE indicator. The display shows “--" if the motor is in motion when trying to access branch pressure. •...
- Page 13 WPT-DB Installation Manual Document No. 910-00014-01, Rev. 04 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 14: Operation
WPT-DB Installation Manual Document No. 910-00014-01, Rev. 04 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 15 WPT-DB Installation Manual Document No. 910-00014-01, Rev. 04 • Once the desired value is reached, press the OVR button to accept the change. Leaving the display on the desired value for 5 seconds will also result in a duration change. During Occupancy Override, the setpoint will revert to the last “Occupied”...
- Page 16 WPT-DB Installation Manual Document No. 910-00014-01, Rev. 04 • Press the OVR button again to see the wireless signal strength from the WPT-DB to the secondary path. NOTE: The Set Point Icon will identify the path currently in use by WPT-DB as shown in Figure 17.
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Page 17: Troubleshooting
WPT-DB Installation Manual Document No. 910-00014-01, Rev. 04 Troubleshooting The WPT-DB is designed with diagnostic functions to detect and diagnose faults. Code Cause Possible Solution Indicates that the WPT-DB is performing a discovery This indication disappears automatically operation and it should not after a few seconds. -
Page 18: Additional Troubleshooting
WPT-DB Installation Manual Document No. 910-00014-01, Rev. 04 Additional Troubleshooting Symptoms Possible Solution For 2 pipe WPTs: 1. First check that the rubber cap is firmly bottomed into port stub as shown in Figure 18 below. 2. Remove the WPT from the Universal Wall Bracket. 3. - Page 19 WPT-DB Installation Manual Document No. 910-00014-01, Rev. 04 Rubber Port Cap below Hose on Port Stub Figure 18. 2 Pipe Thermostat Port Cap Repair Except for the batteries, the WPT-DB 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 20: 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 20 of 20...
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