Crestron DIN-TSTAT-FCU Installation Manual

DIN-TSTAT-FCU
DIN-Rail Heating and Cooling Fan-Coil Thermostat
Installation Guide
Description
The Crestron ® DIN-TSTAT-FCU is a DIN-rail mounted fan-coil unit (FCU) controller
designed for use in two-pipe applications. It may be operated as a stand-alone controller
or integrated with a home automation system or building management system (BMS). The
DIN-TSTAT-FCU is designed to control various heating and cooling configurations.
Additional Resources
Visit the product page on the Crestron website (www.crestron.com)
for additional information and the latest firmware updates. Use a QR
reader application on your mobile device to scan the QR image.
Installation
Use the DIN-TSTAT-FCU in a well-ventilated area. The venting holes should not be
obstructed under any circumstances. The DIN-TSTAT-FCU mounts to a DIN rail. Refer to
the following diagram when installing.
To install the DIN-TSTAT-FCU, press it onto the DIN rail until it snaps into place.
DIN-TSTAT-FCU
DIN rail release
To remove the DIN-TSTAT-FCU from the DIN rail, use a small, flat object (such as a
flat-head screwdriver) to pull the DIN rail release tabs, and then tilt the bottom of the
DIN-TSTAT-FCU away from the DIN rail.
NOTE: Certain third-party DIN cabinets provide space for an informational label
between each DIN rail row. Crestron's Engraver software (version 4.0 or later) can
generate appropriate labels for all Crestron DIN rail products.
Fan Coil Types
The DIN-TSTAT-FCU is a universal FCU controller designed for use in 2-pipe applications.
The DIN-TSTAT-FCU can control a variety of valve types:
• Modulated 0-10 Vac Valve
• Modulated OP-CL 24 Vac Valve
• Spring Loaded 24 Vac Valve
• Modulated OP-CL 230 Vac Valve
• Spring Loaded 230 Vac Valve
• 1-2 Stage Direct-expansion System
NOTE: All set points values for valve, fan speed, and temperature are defined by setting
various parameters according to the customer's needs.
NOTE: For details on controlling the fan speed, refer to the "Fan Speed Control"
section.
Modulated 0-10 Vac
This device is designed for use with a 2-pipe, 3-speed FCU with a 0-10 Vac modulated
valve.
In this case, the valve performs regulation in the ∆T vicinity of set point. The valve opens
and closes according to the graph below. The valve is controlled using 0-10 Vac analog
output.
The diagram of working compressor according to room temperature is shown in the graph
below.
Y (%)
100
DIN rail
Ymin
0
Sp-3∆T Sp-2∆T Sp-∆T SpH SpC Sp+∆T
• SpH - Set point for heating
• SpC - Set point for cooling
• Y - Valve position (0% closed, 100% fully open)
• Ymin - Minimum position of valve when set point is reached
• T - Room temperature
• ∆T - Step of temperature difference (∆T=N•0.5 °C, where N is a settable parameter)
CV
1
WS
Fan
1
NTC
1
WR
POWER SUPPLY: FAN OUT:
230 Vac power input for 230 Vac max fan power
line, neutral, and earth in and fan control out
POWER SUPPLY FAN OUT STAGE OUT
DIN-TSTAT-FCU
DIGITAL IN COM NET
COM: NET:
To the To the
room control
controller system
Modulated OP-CL 24 Vac Valve
This device is designed for use with a 2-pipe, 3-speed FCU with 24 Vac common open or
close valve.
In this case, the valve performs regulation in the ∆T vicinity of set point; the valve opens and
closes at the rate of its defined time, according to the graph below.
Periodically, the valve is forced to the fully open position to eliminate accumulated error.
The error correction period is defined by Reset valve error interval parameter. The valve is
controlled using two triacs (valve open - open and valve close - close).
The diagram of working compressor according to room temperature is shown in the graph
below.
Y (%)
100
Ymin
0
Sp-3∆T Sp-2∆T Sp-∆T
• SpH - Set point for heating
• SpC - Set point for cooling
• Y - Valve position (0% closed, 100% fully open)
• Ymin - Minimum position of valve when the set point is reached
• T - Room temperature
• ∆T - Step of temperature difference (∆T=N•0.5 °C, where N is a settable parameter)
• t - Time to valve reach full open or close position
WS
Sp+2∆T Sp+3∆T T (˚C)
Fan
1
NTC
1
WR
POWER SUPPLY: FAN OUT:
230 Vac power input for 230 Vac max fan power
line, neutral, and earth in and fan control out
POWER SUPPLY FAN OUT
VALVE OUT:
24 Vac power and 0-10 Vac DIN-TSTAT-FCU
control to the valve
DIGITAL IN
VALVE OUT
COM:
STATUS To the
NET
room
COM
controller
TEMP SENSE
TEMP SENSE:
From the
temperature
sensor
Spring-loaded 24 Vac Valve
This device is designed for use with a 2-pipe, 3-speed FCU with spring-loaded 24 Vac
valve.
In this case, the valve operates as an on and off valve. The valve value is calculated
according to room temperature, as shown in the graphs below. The valve is controlled
using one triac (valve open).
The diagram of working compressor according to room temperature is shown in the graph
below.
Valve Position According to Room Temperature ‒ Cooling
T (˚C)
∆T* Ymin
Sp
0
valve %
T (˚C)
SpH SpC Sp+∆T Sp+2∆T Sp+3∆T
100
0
Valve Position According to Room Temperature ‒ Heating
T (˚C)
Sp
∆T* Ymin
0
CV
1
S
valve %
100
0
• Sp - Set point
• ∆T - Step of temperature difference (∆T=N•0.5 °C, where N is a settable parameter)
• t - time
VALVE OUT:
24 Vac out and solid state
switch control to valve
STAGE OUT VALVE OUT
POWER SUPPLY:
STATUS 230 Vac power input for
NET
line, neutral, and earth
COM
COM NET TEMP SENSE
POWER SUPPLY
NET: TEMP SENSE:
DIN-TSTAT-FCU
To the From the
control temperature
system sensor
DIGITAL IN
t (time)
t (time)
t (time)
t (time)
CV
1
WS
Fan
1
NTC
1
WR
FAN OUT: VALVE OUT:
230 Vac max fan power
24 Vac power out and solid
in and fan control out state switch control to the valve
FAN OUT STAGE OUT VALVE OUT
STATUS
NET
COM
COM NET TEMP SENSE
COM: NET: TEMP SENSE:
To the To the From the
room control temperature
controller system sensor