“Go from Pneumatic to DDC in 20 minutes” Legacy pneumatic thermostats are manual devices that are hard to maintain, waste energy, and negatively impact comfort.
Direct Digital Control (DDC) retrofit projects are difficult, disrupt occupants and cost $2,000 – $3,000 per thermostat thermostat with long paybacks.
The Wireless Pneumatic Thermostat (WPT) offers the same benefits as DDC thermostats but can be installed in minutes for a fraction of the cost with a fast payback.
Benefits
2-3 year payback
20-30% energy savings
Easier and faster maintenance
Improved occupant comfort
20-60% fewer hot/cold calls
LEED points
Auto-demand response and energy efficiency utility incentives
BACnet/IP interface for integration with Building Management Systems
Typically 3-5 years of battery life
Replaces any legacy pneumatic thermostat, e.g. two pipe, single pipe, direct acting, reverse acting, summer/winter, etc.
Optional deadband capabilities (separate heating and cooling setpoints)
Optional relative humidity (RH) sensor
Automatic self-calibration
Remote wireless setpoint control
Trend data
Alarm notification of excursions
HVAC Control Strategies Enabled by the WPT System
Programmable temperature setbacks (occupied/unoccupied) with occupancy override
Setpoint strategy:
Zone-level resets
Programmable limits (i.e. specified range for occupant control)
Deadband setpoint control (i.e. separate heating and cooling setpoints)
Automated diagnostics for ongoing commissioning through SMARTPneumatics
Optimal start/stop
Supply air temperature reset
Duct static pressure reset
Pre-cooling
Auto-demand response
Wireless
Projects deployed since 2021 use LoRaWAN, which is a secure 900 MHz wireless protocol in wide use. The LoRa wireless reaches ~150 feet in radius from the gateway and eliminates the need for repeaters. Our projects are now even easier and more cost effective.
Projects deployed before 2021 used the 2.4 GHz Wireless USB protocol. This legacy wireless will be supported and replacement parts will be available indefinitely.
Note that the materials below do not contain passwords. If you need passwords, please contact Cypress Envirosystems at support@cypressenvirosystems.com.
1. Orifice diameter should not be confused with pipe diameter. Consult the steam trap manufacturer if orifice size is not known.
2. Calculations are theoretical estimates and actual results will vary. Payback calculation includes avoided lost steam and inspection labor. Benefits from avoided damage resulting from blocked traps are not included in model. The formula used for steam loss in this model is: L=24.24*Pa*D2. Where L=pounds/hour, Pa=Pgauge + Patm , D=orifice diameter. http://www1.eere.energy.gov/manufacturing/tech_deployment/pdfs/steam_pressure_reduction.pdf
3. Actual WSTM installed cost will vary based on volume and integrator.
4. Refers to the manual inspections of steam traps that are currently being done at the facility. The frequency determines the potential avoided failure time when using the WSTM.
5. The frequency and cost of inspection determine the labor savings enabled by the WSTM.
6. The failure rate per year should be based on historical data from the facility. 15-20% failure rates per year are typical. In unmaintained facilities, the failure rate can be much higher: http://www1.eere.energy.gov/femp/pdfs/om_combustion.pdf
