Contemporary Controls BASstat BAST-221C-BW2 Installation Manual

BACnet/IP Wi-Fi communication requires connecting to the thermostat as an access
point for initial configuration. A Wi-Fi enabled laptop/computer or smart portable
device can discover the BASstat initially as a Wi-Fi access point with SSID “WiFi-

122B-xxxx” and no passphrase by default (simply click to connect to Access Point).
The digits “xxxx” in “122Bxxxx” are the last 4 digits of the thermostat’s Wi-Fi chip

MAC address found written on the back side. This can assist when multiple Wi-Fi
stats are installed (outlined in image below). Once connected to the thermostat, open
its web page by typing 192.168.0.1 with admin for username and no password. Web
page will be presented for network configuration. After initial connection, the Wi-Fi
mode in the thermostat can be changed to Infrastructure and the local Wi-Fi
network configuration can be entered and stored. A reboot of the thermostat is
required. Thanks to its EEPROM, the BASstat will store configuration in the event of
power loss. If configuration fails or the thermostat needs to be configured to use a
different Wi-Fi access point, the thermostat must be reset and reconfigured. Reset
will restore all values to default and can be selected from Engineering Menu (rSt).

The BASstat series of BACnet-compliant communicating thermostats are BTL listed
to ensure effortless integration into BACnet/IP networks using a Wi-Fi connection.
These thermostats are suited for single or multi-stage heating, cooling and ventilation
binary output control applications such as RTU or AHU. Configurable control
algorithm parameters allow adaptability to the specific application. Adaptive control
algorithm applied to multi-stage on/off control saves energy and ensures seamless
comfort for the occupants. Built in temperature sensor, input for remote temperature
sensor, or temperature override network command from Building Automation
System. Occupancy status can be set from thermostat buttons or over the BACnet
network. Thermostat buttons are optionally lockable to prevent unauthorized control.
Digital display with graphical icons is easy to read and understand. Several icons
indicate parameters such as: Active Mode, Cooling stage 1 or 2, Heating stage 1 or
2, Ventilation Only, Fan Active, Occupied / Unoccupied state, and Clock icon to
indicate Short Cycle Delay or Max Cycles per hour active waiting state. Four main
control types are available: Cooling and Heating with Auto-changeover, Cooling or
Heating with Manual-changeover, Cooling only, and Heating only. These control
types are selectable from Engineering Menu (tyPE) or BACnet object MSV8.

Electrical (Class 2 Circuits Only)
INPUT AC only

Voltage (±10%): 24 V
Power: 5 VA
Frequency: 47-63 Hz

Environmental

Operating temperature: 0°C to 60°C
Storage temperature: –40°C to +85°C
Relative humidity: 10–95%, non-condensing

Functional Wi-Fi
Physical Layer: 802.11b/g/n

Wi-Fi range 150ft. as defined by the standard
(depending on obstructions)
54Mbps max data rate

The BASstat requires 24 VAC while drawing no more than 5 VA of power. The
recommended conductor size is 16–18 AWG or up to 2x 1.5mm wires.

WARNING: Internally, this device utilizes a half-wave rectifier and therefore can only
share the same AC power source with other half-wave rectified devices. Sharing AC
power with full-wave rectified devices is NOT recommended. Devices powered from
a common AC source could be damaged if a mix of half-wave and full-wave rectified
devices exists.

BASstat mounts directly onto wall, panel, standard 65×65mm junction box (hole pitch
60 mm) or standard 2×4 inch vertical junction box (hole pitch 83.5 mm). To mount on
electric box, separate back plate from the controller by loosening the screw. Align the
mounting holes of the back plate to the screw holes of the electric box. Fix the back
plate to the electric box using screws. Suggested screws for use are Phillips wide
“truss head” or “washer head” screws #6-32 x ¾” (20mm). Wire the controller and
mount on top of back plate. Secure by tightening the mount screw at the bottom.

WARNING: DO NOT let the back-mount screw heads rise above the back plate or it
may touch the circuit board and cause a short.

BAST-221C-BW2 BASstat

BACnet/IP Wi-Fi Thermostat Installation Guide

Installation

Mechanical Operation Overview

A unique Device Instance number throughout the entire BACnet internetwork is required to distinguish the device from all other BACnet devices. When more than one
BASstat is installed at the same time, their Device Instance numbers must be configured prior to connecting to the BACnet/IP network or BACnet communication will fail due
to duplicate instances. Device instance can be modified in Engineering Menu items (dEVH) – high bytes and (dEVL) – low bytes; Device Instance = (dEVH)*1000+(dEVL).

To enter the Engineering Menu, hold down the UP and DOWN buttons simultaneously for 5 seconds. Use the UP and DOWN buttons to navigate through the menu and
change menu item values. Use the MODE button to enter a menu item and accept/confirm a selected value. To exit the Engineering Menu, navigate to menu item (End) and
press MODE, or the menu will exit automatically when not used. The BASstat has a built-in space temperature sensor with provision for remote wired 3kΩ NTC thermistor
sensor or temperature value can be sent by another device over the BACnet network.

The default control type is Cooling and Heating with Auto-changeover. Four main control types are available: Cooling and Heating with Auto-changeover, Cooling or Heating
with Manual-changeover, Cooling only, and Heating only. These control types are selectable from Engineering Menu (tyPE) or BACnet object MSV8. User-side comfort
control is accomplished with six buttons – mode (Heat, Cool, or Ventilation – dependent on control type chosen from Engineering Menu (tyPE) or BACnet object MSV8), fan,
raise, lower, set, and power. There is also options to lock select buttons or all buttons on the thermostat. A large LCD display indicates setpoint, space temperature and
current mode of operation using graphical icons. By default, the BASstat thermostat will not provide Fan output signal when in Heat Mode since most HVAC comfort systems
provide their own Fan control signal based on a delay after a call for heating. This can be configured from Engineering Menu item (F-Ht) or BACnet object BV15 with a default
value of 0. To enable fan output for heating, set this value to 1.

Reset settings can be performed from Engineering Menu item (rSt) which will reset all parameters including communication (MAC and Device Instance) and all control
algorithm values back to factory-programmed defaults.

For complete datasheet and details on BASstat, support, or compliance information, please download our BASstat User Manual and Data Sheet at:

https://www.ccontrols.com/basautomation/basstat.php

Contemporary Control Systems, Inc. reserves the right to make changes in the specifications of the product described within this manual at any time without notice and without obligation of Contemporary Control Systems, Inc.
to notify any person of such revision or change.

TD150905-0IA