Frigor Tstat Series Manual Download Page 21

Page: 21 / 56

Tstat Series

- 21 -

Code

Description (Range, Default)

Ou1
Ou2

Output settings (0-4, 0)

Sets the full-scale voltage of the analog outputs. Ou1 sets analog out 1 (Cooling). Ou2 sets analog out 2 (Heating).
This setting is used to match the analog outputs to various types of actuators, transducers or other controllers.
For example, by setting the output range to act over a 5VDC scale you can set the tstat up as a transducer to interface into a master DDC
controller. Or perhaps you have a valve that operates over the 2-10VDC range, this ‘output’ type setting lets you tailor the tstat to the
particular application.

OuX = 0, the output will act in on/off mode.

• There are 4 types of tstats. Only the Tstat5A and Tstat5CM have analog output capability.
• For Tstat5B and Tstat5C, the

rmware recognizes the relays and this will be permanently set to 0 and is not adjustable.

• For Tstat5A and Tstat5CM with analog outputs, the output will be 0V when OFF and 10V when ON. This is useful only if you hap-

pen to have a Tstat5A or 5CM and need a couple of extra on/off outputs

OuX = 1, the outputs will modulate from 0V to 10V over the 0-100% range of any particular stage of heating or cooling.
OuX = 2, same as the ‘1’ setting but the output modulates over the 0-5V scale
OuX = 3, same as the ‘1’ setting but the output modulates over the 2-10V full scale
OuX = 4, same as the ‘1’ setting but the output modulates in reverse i.e. 10V-0V

Note: For a 4-20ma actuator it is simple to convert the 2-10VDC signal to a 4-20ma signal by tying in a 250 ohm resistor in series with the
output and making sure the grounds of the actuator and tstat are common.

SLO

SHI

Setpoint Minimum (0-255, 15) for deg C, (0-255, 55) for deg F
Setpoint Maximum (0-255, 50) for deg C, (0-255, 99) for deg F

Rev24: The maximum and minimum allowable user setpoint settings. The occupants cannot adjust the setpoint above or below these set-
tings. The min and max setpoint values are in increments of 1° (i.e. 20 means 20°) and are in the same units (C or F) as the tstat.

Note: the heating and cooling deadbands act in a way that reduces these settings by the amount of the deadband. For example, if the
highest setpoint allowed is ‘SHI’ = 30°C and the heating deadband ‘Hdb’ = 2°C, heating will actually only be active up to 28°C. Similarly,
if the ‘Cdb’ cooling deadband parameter is at 2°C and the minimum setpoint is at 20°C, then cooling takes place only as low as 22°C.

LOC

Keypad lockout (0-3, 0)

Rev25 only: This setting is useful to keep the building occupants from experimenting in the menu system. When the LOC parameter is
set to ‘1’ the keypad will be locked out from all menu operations. The normal operation of the keypad is not affected; the fan and setpoint
buttons work as usual.
When the LOC parameter is set to ‘2’ the keypad will be locked out from partial menu operations allowing maintenance personnel to access
some of the less critical menu parameters while maintaining a LOC on functions reserved for the primary administrator. This option allows
access to calibration of the internal and external temperature sensor (CAL and CAE) and the override time parameter (ORT).
LOC = 3,The user can not do anything from keypad except enter menu mode.In menu mode,the user can set setpoint ,fan speed,calibration
and override timer.
When the menu system is locked out, the only way to adjust the tstat parameters is through the network port or through the communica-
tions jack at the bottom of the tstat. The parameter can be set back to ‘0’ only though the communications ports as well

dIS

Display Setting (0-6, 0)

This allows the display to be con

gured in a few different modes.

0 = display the room temperature. 1 = display the setpoint. 2 = blank display. 3 = display pid2 value. 4 = display pid2 setpoint.
5 = display by manually. 6 = dispaly nothing except keypad pressed.

Vtt

Valve Transient Time (10-255, 0)

This setting allows the user to adjust the valve transient time from fully open to fully closed. Value ranges from 10 (10s) to 255 (255s)

DEF

Accept Default Setting (0-1, 0)

This allows the user to de

ne the current Tstat con

guration as the new FACtory default. Look below in Factory Default for greater

details.

Year, month, date

Sun-Fri, time

Workday, Night and Day, Time