Datasheet

58
Zone Controllers
TAC Xenta 121- HP
Programmable Heat Pump
Application
The sequences for cooling, heating and fan are completely user program-
mable, allowing for numerous different applications. For energy savings,
the controller has built-in economizer functionality. Use TAC Xenta 121-HP
with any TAC STR room unit. Set-up is done using the programming tool
TAC ZBuilder, which can be run stand-alone or as a device plug-in to either
TAC Vista or LonMaker
®
. The configuration settings are downloaded into a
TAC Xenta 100, prepared with the necessary basic application software. The
controller is a LONMARK
®
compliant device aimed at communicating on a
LonTalk
®
TP/FT-10 channel. It is able to operate both as a stand-alone device
and as part of a system. In- and output network variables can be monitored
via the TAC Xenta OP.
SPECIFICATIONS
Supply Voltage
HP/24 . . . . . . . . . . . . . . . . . . . 24 V AC ±20%, 50–60 Hz
HP/230 . . . . . . . . . . . . . . . . . . 230 V AC ±10%, 50–60 Hz
Power consumption . . . . . . . . . 5 VA
Dimensions . . . . . . . . . . . . . . . 126 x 122 x 50mm (5” x 4.8” x2”)
Ambient temperature
Operation . . . . . . . . . . . . . . . . 0°C to +50°C (32°F to 122°F)
Storage . . . . . . . . . . . . . . . . . . –20°C to +50°C (–4°F to 122°F)
Humidity . . . . . . . . . . . . . . . . . max. 90% RH non-condensing
Enclosure rating . . . . . . . . . . . . IP 30
Digital inputs . . . . . . . . . . . . . . 3, (X1-X3) NO/NC
Thermistor inputs . . . . . . . . . . . 2, (B1-B2) NTC 1.8 kohm at 25°C (77°F)
Universal input . . . . . . . . . . . . . 1, (U1), configurable as thermistor, digital
or analog input
Potentiometer input . . . . . . . . . 1, (R1) 10kohm
Triac outputs . . . . . . . . . . . . . . 4, (V1-V4) 24 V AC Intern. supplied
Relay outputs . . . . . . . . . . . . . . 3, (K1-K3) 250 V AC, 3A
Relay output . . . . . . . . . . . . . . 1 (K4) HP24 24 V AC, HP230 250VAC, 3A
Voltage output . . . . . . . . . . . . . 1 (Y1) 0-10 V DC
DESCRIPTION
0-073-0631-0 Contr Zone TAC Xenta 121-HP/24
0-073-0632-0 Contr Zone TAC Xenta 121-HP/230
0-073-0914-0 LNS Plug-in
FUNCTIONAL FEATURES
• The controller is designed for
both water-sourced and air-
sourced heat pump installa-
tions
• Multi-functional Heating
and Cooling: the controller
handles heating, cooling and
secondary heating
• Multi-stage Fan Control:
The Xenta 121 controller
handles up to three stages or
analog speed control
• Indoor Air Quality Control
functions:
Full support for CO
2
and RH
(Relative Humidity) functions
• Exception modes take care of
abnormal conditions like fire,
compressor lockout or risk of
frost
• Handles reversing and isola-
tion valves
• Configurable In- and Outputs:
All inputs and outputs are
configurable to minimize
installation cost