Contact Us


Frequency Asked Questions - WPT

How does WPT control the existing pneumatic dampers and actuators?
No changes are required in the existing pneumatic system to make it work with the WPT. You just need to replace the existing pneumatic thermostat with a WPT. The WPT is provided with a universal adaptor plate which can be fitted to the existing location. As with any pneumatic control system, you should verify that you have a clean, dry compressed air system, free of oil and contaminants.
The existing pneumatic dampers and actuators are controlled in the same way as using a conventional pneumatic thermostat. The WPT does not change the existing pneumatic control mechanism. Each WPT has an in-built Pneumatic Thermostat that connects the WPT to the existing pneumatic air pipes. The pressure on the branch pipe changes depending on the difference between the setpoint and zone temperature. The WPT enables the user to remotely monitor and control the setpoint changes.
The WPT is compatible with most of the single pipe and dual pipe, Direct and Reverse acting and summer-winter thermostats. The universal adaptor plate provides easy retrofit provision for all major brands in the market such as Honeywell TM, Johnson Control TM, Siemens TM , Powers TM, and TAC TM. Presently, the WPT is not compatible with the dead-band control thermostats.
The WPT uses the LoRaWAN wireless protocol.
LoRaWAN is a widely accepted, secure protocol that has been safely used in highly secure environments.
The radio output power with the antenna produce an RF signal up to +24dBm.
900 MHz
No. Extensive testing has shown that our wireless solution has no effect on the data throughput of other common wireless technologies, such as Bluetooth and Wi-Fi. which operate on a different wireless spectrum.
The operating range of the WPT is mainly dependent on the installation site and its RF environment. The typical range on a single floor is 100-150ft. The actual range will vary from site to site and time to time depending on many variable elements such as RF interference and RF obstacles.

The WPT battery life depends on number of setpoint changes made on the stat. For a typical use of two setpoint changes per day, estimated battery life is more than three years.

The WPT system consists of the following key components:
  • WPTs of Single/Dual pipe with Direct/Reverse acting configurations
  • LoRa Gateway to receive the wireless signals
  • Green Box Controller that hosts the web applications and configuration tools. The Green Box  provides BACnet/IP interface to integrate the WPTs with an existing Building Automation System.

The LoRa wireless enables home-run (star configuration) communications to the LoRa Gateway. One LoRa Gateway can support up to 100 thermostats and generally provides wireless coverage for one floor up and one floor down.

The WPT sends the current reading and receives setpoint change commands every five minutes.

WPT BACnet Server, part of the GBC Controller, contains the BACnet/IP stack and the BACnet Gateway application for the WPTs. WPT BACnet server is required to integrate the WPTs with the existing Building Automation System.

The WPT can be integrated with the existing building automation system via BACnet/IP using WPT BACnet Server. The BACNet device objects are “discovered” from the building automation BACNet system and used as data points for system programming and control. Each of the WPTs is represented as BACnet device objects on the BACnet network. The building automation system can access the WPT BACnet device objects using BACnet/IP protocol. The WPT BACnet Server allows the building automation system to read and write the present values of the BACnet Objects.

Replacing an existing pneumatic thermostat with a WPT is quick and easy. Simply remove the existing thermostat (careful to mark main and branch lines). Install the WPT universal adapter plate, re-connect pneumatic lines to the WPT, install the WPT batteries and the WPT cover.  The process takes 5-10 minutes per thermostat.

The WPT must be configured with the GBC and Blue Box Gateway by uploading a CSV file and binding the thermostat to the gateway.

2nd generation WPT’s (introduced November 2025) are self-calibrating – no need for manual calibration.

For earlier generation WPT’s, it is always good practice to check the thermostat for proper calibration after it is installed. Calibration requires a few simple steps using the WPT keypad and takes only minutes. No tools or test gauges required.

No, you must indicate what control action is required when ordering. The WPT is available in either DA or RA action and can be ordered as 2-pipe or one pipe thermostats.

The WPT provides numerous advantages over a conventional pneumatic thermostat, including:

  • Remote setpoint control (including night-setback)
  • Time of Day scheduling
  • Occupancy override
  • Demand response strategies
  • Trending & reports
  • BACNet interface to compatible BMS systems
  • Enabling energy savings strategies e.g. duct static pressure reset, supply air temperature reset, optimal start/stop etc.
  • Optional SMARTPneumatics automated fault detection e.g. air leaks, stuck actuators, mis-calibration, water in air line etc. 
The WPT can be ordered with a concealed cover. Alternatively, the WPT keypad can be programmed to lock out any local adjustments that are normally made from the keypad (such as setpoint adjust, etc.).

Our mission is to help existing plants and buildings improve safety, comfort, reliability and energy efficiency.  We specialize in technologies which can be installed with minimum disruption and expense.

Linkedin Youtube Facebook-f

 

 

Headquarters:

6830 via del Oro
Suite 100
San Jose, CA 95119

Phone: +1 (800) 544-5411
Email: info@CypressEnvirosystems.com