Cypress WPT-800 Series User manual

WPT Installation Manual
Document No. 910-00005-01, Rev 17
Wireless Pneumatic Thermostat- WPT-800 Series
Page 1 of 19
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

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•Configuring the WPT
•Calibrating the WPT
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 mounting screws and carefully remove 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
Electrical
Contacts

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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. Remove the plastic cover of the WPT using a 1/16” Allen wrench on the bottom
screw.
2. 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.
Do Not Touch
Calibration
Screw

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Figure 3. Removing the Universal Wall Bracket
3. 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). The Universal Wall
Bracket is shown in Figure 4.
Figure 4. Universal Wall Bracket
4. Pull the air tubes through the central opening of the Universal Wall Bracket.
5. Affix the Universal Wall Bracket to the wall with two screws, as shown in Figure 5.
Note: The provided Wall Anchors can be used if existing receptacles are not in the
correct location, or if they are damaged.
Unscrew these two screws to
Dismount wall bracket from rear side

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Figure 5. Mounting the Universal Wall Bracket
6. 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
7. Attach the WPT to the Universal Wall Bracket using the captive screws.
8. Install the batteries and close the top cover. The battery polarities are as shown
in Figure 7.

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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.
•Underwriters Laboratories Recognition Mark:
•Caution: The battery used in this device may present a fire or chemical burn
hazard if mis-treated. Keep away from children and/or other untrained
personnel. Do not recharge, disassemble, heat above 100 ºC (212 ºF), or
dispose of in fire.
•Dispose of used battery promptly in accordance with local regulations (place in
plastic bag and recycle if possible).
•Do not insert batteries with the and polarities reversed.
•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 2.2.4.
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 Programming Mode Password
A password is required to enter the Programming Mode. After pressing all three
buttons simultaneously, the following screen will appear:
The password is a series of button presses: “OVR”,”OVR”,” ▲”, “▼”, “OVR”
2.2.2 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 programming the WPT, insert the batteries in the holder and press any button.
The system will turn 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 performing any
additional operations. After initialization, the LCD displays either E0 or the current
temperature. See troubleshooting section 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 buttons simultaneously, then release. The WPT enters
“Programming Mode” and requires a password to continue (see section 2.2.1 ).
After the password is successfully entered, the screen will show the current or
default network ID.
NOTE: °F icon is displayed, indicating that the network ID is being programmed.
Press and release all three
buttons simultaneously to
enter Programming Mode
After entering a correct
password, the Network ID
will flash signifying
Programming Mode
Figure 10. Configuring Network ID

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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.
NOTE: °C icon is displayed, indicating that the node ID is being programmed.
4. Press the ▲or ▼button 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.
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, continue to press OVR to exit the
Programming Mode.
NOTE: The WPT will automatically exit the Programming Mode if no button is
pressed for one minute.
The network and node IDs can be changed any time by completing steps 1 through 7.
2.2.3 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:

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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.
3. Press ▲or ▼to toggle between Celsius and Fahrenheit.
4. Press OVR to accept the C/F change.
5. Continue to press OVR to exit Programming Mode.
6. Verify that the ambient temperature is displayed in the selected units (C or F).
2.2.4 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 buttons simultaneously to enter
“Programming Mode” and enter the password (see section 2.2.1 ).
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 buttons simultaneously to toggle between Standalone (RF Mode)
On and Off. In this menu, 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.
NOTE: The Occupancy state of a WPT in Standalone is always “Occupied”.
Occupancy Override will not be available, see section 3.2.
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 14. The factory setting provides a Throttling
Range (TR) of 4°F. This TR adjuster MUST NOT BE MOVED in order to
ensure proper operation and accuracy of the WPT.
2. To enter Calibration Mode, perform the following:
•Press the ▼button and OVR button together for two seconds. The display
will show ‘dt’.
•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.
•Press all buttons simultaneously to enter Calibration Mode. The “C” icon will
flash rapidly while in this mode.