Cypress WPT-800 Series User manual

WPT Installation Manual
Document No. 910-00005-01 rev 11
Wireless Pneumatic Thermostat- WPT-800 Series
Page 1 of 14
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, 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)
•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 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
•Philips-head screwdriver
•1/16” hex Allen wrench
•2mm hex Allen wrench
2 WPT Installation
The overall WPT installation procedure includes:
•Mounting the WPT on the wall
•Configuring the WPT
•Calibrating the WPT

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2.1 Mounting the WPT
2.1.1 Remove the Existing Thermostat
1. Remove the external cover of the existing thermostat, if any.
2. Locate and remove the fixing screws and carefully withdraw the unit from the wall
along with the attached pneumatic tubes.
3. Detach the old thermostat unit from the air tubes carefully. The air tubes may not
have a lot of slack – be careful that the tubes do not retract into the wall. In a 2-
pipe system, note the positions of branch and main tubes.
ESD Handling Precautions
Warning!
•The WPT contains ESD sensitive circuit cards and components.
•Great care must be exercised while handling the WPT with the cover open.
•Do not touch any of the circuit boards with fingers or any part of the body.
•Touching the circuit boards may cause the unit to fail due to electrostatic
discharge.
•Hold and handle the unit as shown in Figure 1, using the external bottom plastic
cover as the support.
Figure 1. Handling the WPT
Do Not
Touch

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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.
•Damage to the bi-metallic spring can result if the end of the lever is allowed to
move left or right by more than 1/16”.
Figure 2. WPT Lever
2.1.2 Installing the WPT
The WPT is installed in the existing thermostat location using the universal wall
bracket provided with the WPT kit. To install the WPT:
1. If the universal wall mounting bracket is attached to WPT, remove it by
unscrewing the two captive screws on the bottom of the WPT, as shown in
Figure 3.
Calibration
Set Screw
Do Not Touch

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Figure 3. Removing the Universal Wall Bracket
2. Adjust the universal wall bracket against the old thermostat position, such that
any two slots on the wall bracket match the existing two holes on the wall. The
universal wall bracket is shown in Figure 4.
Figure 4. Universal Wall Bracket
3. Pull the air tubes through the central opening of the universal wall bracket.
4. Affix the universal wall bracket to the wall with two screws, as shown in Figure 5.
Figure 5. Mounting the Universal Wall Bracket

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5. 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.
Figure 6. Connecting Main and Branch Tubes to M and B Ports
6. Fit the WPT to the universal wall bracket using the captive screws.
7. Fit the batteries and close the top cover. The battery polarities are as shown in
Figure 7.
Figure 7. WPT Batteries
2.1.3 Installing/Replacing Batteries
Replace battery with CR123 type or equivalent from Panasonic, Sanyo, Energizer or
Duracell only. Use of any other battery may present a risk of fire or explosion. See
Figure 7 for correct polarity.
•Do not charge.
•Do not heat, disassemble nor dispose of in fire.
•Do not insert batteries with the and polarities reversed.

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•Do not short-circuit.
•Be sure to wrap each battery when disposing or storing to avoid short circuit.
•If leaked liquid gets in the eyes, wash them with clean water and consult a
physician immediately.
•Do not use new and used batteries together. Do not use different types of
batteries together.
•Do not apply strong pressure to the batteries nor handle roughly.
•Do not use or leave the batteries in direct sunlight or in high-temperature areas.
2.2 Configuring the WPT
NOTE: When installing the WPT in a standalone mode, please skip to Section 2.2.3.
The WPT can be configured using the LCD display and the 3 front buttons. The
menu structure is displayed below. Please refer to this diagram while calibrating and
configuring the WPT.

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Figure 8. WPT Menu Structure

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2.2.1 Configuring the Network ID and Node ID
The WPT must be configured with a valid network ID and node ID for the unit to be
operational. The network ID is a single digit number. The node ID is a four digit
number. The four digit node ID is displayed in groups of two (D2, D1 together and
D4, D3 together).
D4 D3 D2 D1
Figure 9. WPT Node ID Digits
Before configuring the WPT, insert the batteries in the holder and press any key. The
system will switch on and initialize. During initialization and whenever the WPT starts
a discovery process, “dy” is displayed on the LCD. During this period the WPT is
attempting to discover its nearest RWALs and HUSB. This process should not be
disturbed. Wait for the “dy” to disappear from the LCD before commencing any
operation. After initialization, the LCD displays either E0 or the current temperature.
See Section 4 for a description of display codes. The WPT is now ready for the
configuration of the network ID and the node ID.
To configure the network ID and the node IDs, perform the following:
1. Press all three keys simultaneously, hold for two seconds, then release. The
WPT enters “Programming Mode” and shows the current or default network ID.
NOTE: °F icon is displayed, indicating that the network ID is being programmed.
Press and release all three
keys simultaneously to enter
Programming Mode
Digit will flash when
configuring the Network ID
Figure 10. Configuring Network ID
2. Press the ▲ or ▼ key 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.
NOTE: °C icon is displayed, indicating that the node ID is being programmed.
4. Press the ▲ or ▼ key to change D1 to the required value.
NOTE: D1 cannot have an “F” value.
5. Press OVR to confirm D1.
6. Repeat steps 4 and 5 to configure D2, D3, and D4 of the node ID.

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NOTE: While the node ID is being configured, the corresponding bar of the
battery indicator flashes.
Figure 11. Configuring Node ID 4321
7. After D4 is configured and confirmed, press the OVR button 3 times to exit from
Programming Mode.
NOTE: The WPT will automatically exit the programming mode if no key is
pressed for one minute.
The network and node IDs can be changed any time by completing steps 1 through 7.
2.2.2 Selecting between Celsius and Fahrenheit display
The WPT can display temperatures in Celsius or Fahrenheit. The default setting is
for Fahrenheit. To toggle the setting:
1. From the home screen, press all three keys simultaneously to enter
“Programming Mode”.
2. Press the OVR button 5 times to navigate past the Network and Node ID
programming screen and into the Celsius/Fahrenheit screen.
3. Press ▲ or ▼ to toggle between Celsius and Fahrenheit.
4. Press OVR to accept the C/F change.
5. Press OVR to exit Programming Mode.
6. Verify that the ambient temperature is displayed in the selected units (C or F).

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2.2.3 Standalone (RF Mode) On/Off
The WPT can also be used as a standalone pneumatic thermostat. In this setup, the
wireless radio is turned off to preserve battery life. If the radio remains on without a
wireless network, the WPT will continually search for a network, which reduces the
overall battery life. To turn off the radio, perform the following:
1. From the home screen, press all three keys simultaneously to enter
“Programming Mode”.
2. Press the OVR button 6 times to navigate past the Network, Node ID, and the
C/F screen into the Standalone On/Off screen.
3. Press all three keys simultaneously to toggle between Standalone (RF Mode) On
and Off. When the battery icon is empty, RF is off and the device is in
standalone mode. When the battery icon is full, RF is on and the device requires
a Wireless Network.
4. Press OVR to accept the Standalone changes and exit Programming Mode.
2.3 Calibrating the WPT
1. Remove the front cover of the WPT and make sure that the WPT is acclimatized
to the ambient temperature.
NOTE: This can take 5 to 10 minutes after attachment to the wall. The bi-metallic
spring is very sensitive to body heat. Keep hands and breathe away from
WPT to minimize calibration error.
NOTE: The black throttling range adjuster has been factory set to the location marked
on the lever as shown in Figure 12. The factory setting provides a Throttling
Range (TR) of about 4F. The TR adjuster is very sensitive and should not be
moved more than ±0.100” from the factory setting. The bi-metallic strip can
be damaged if enough care is not taken while moving the throttling range
adjuster. Use a gentle nudging motion on the throttling range adjuster,
without exerting force on the bi-metal strip, as this type of force will likely
damage the bi-metallic strip.
2. Configure the setpoint manually using the ▲ or ▼ key to match the ambient
temperature value displayed on the LCD.
3. Set the WPT for the branch line pressure measurement mode following the
instructions in Section 3.3.
4. Use a 1/16” hex Allen wrench and very carefully turn the calibration set screw on
the thermostat lever, shown in Figure 12, until the desired branch pressure is
achieved. Use extreme caution not to allow the lever to rotate sideways while
adjusting the setscrew. Damage to the bi-metallic spring can result if the end of
the lever is allowed to move left or right by more than 1/16”.
NOTE: Single pipe WPTs might take a longer time to respond during calibration.
Please allow sufficient time to calibrate the WPT accurately.