Cypress WPT-800 Series Installation Manual

WPT Installation Manual

Document No. 910-00005-01, Rev 17

Wireless Pneumatic Thermostat- WPT-800 Series

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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 2­pipe 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.