Tank Net TC-1 User manual

TC-1 Controller
*** USER'S GUIDE ADDENDUM ***
Night Air Cooling
Firmware Version 3.9
Document Version: 1.0

Addendum Summary
This addendum describes how to enable and use the new
night air cooling modes available with TC-1 controller
firmware version 3.9 and higher.
Night air cooling modes allow a single TC-1 controller to cool
space temperature via fresh air draw (ventilation) or
mechanical refrigeration (A/C). TC-1 night air logic uses both
inside and outside air temperatures to determine which
method of cooling to employ.
Basic Features:
Uses two probes: one inside and one outside.
Offers two different night air cooling modes: NA1 and
NA2
Set point (SP1) specifies the maximum desired space
temperature
Night Air Mode 1 (NA1) uses a second set point (SP2)
to specify maximum outside air temperature above
which fresh air ventilation is inhibited.
Night Air Mode 2 (NA2) uses SP1 and a fixed scale
factor against which thermostat differential (Dif) is
multiplied and then subtracted from inside air
temperature to dynamically determine when it's
appropriate to engage fresh air ventilation.
If outside air temperature is too high for ventilation,
then mechanical cooling will be engaged instead.
New set point input routines allow SP1 and SP2 to be
adjusted individually or together, simultaneously.
Acrolon Technical Support
Phone: [phone] (option 2)
E-mail: [email protected]
Web: www.acrolon.com

Hardware Set up
The following describes the hardware configuration required
for proper night air cooling operation. For complete controller
installation details, please see TC-1 Installation Guide and
related advisories.
zPower the TC-1 via appropriate mains voltage
(Line/Neutral/Earth) per TC-1 Installation
Instructions.
zAttached a TP-1 and a TP-2 temperature probe to the
controller's probe bus per the following: Install the
TP-1 within the control space as close to the
controller as possible. Install the TP-2 probe in a
location suitable for monitoring outside air
temperature, avoiding direct sun light or heat
generating equipment. IMPORTANT: Use only
shielded, CAT-5 cable to extended the probe cables.
Ground the cable shield at the controller end only. Do
not ground the shield at any other location along the
bus. Do not exceed 75' of total probe cable length.
Run probe cabling in a bus fashion (e.g., from
controller to TP-1 probe and then from the TP-1 to
the TP-2). Make all cable splices as close to the
probes as possible and use only moisture-proof, gel-
filled IDC connectors for splices. Ensure that shield is
contiguous throughout the bus (e.g., from controller
through to last probe in the chain.
zWire RELAY 1 contacts to the control input for space
ventilation
zWire RELAY 2 contacts to the control input for the
space A/C unit (optional).
zAttach network cable to the controller per TC-1 User's
Guide and per Echelon's FT wiring guidelines.

Initial Software Set up
Enable Extended Functions:
zEnter program mode by pressing and releasing the PGM
button
zPress the PGM button to advance to the 'CC' and turn
this menu item 'On' via the UP or DOWN button
zPress the PGM button to advance to 'diF' (thermostat
differential) and adjust as desired via UP/DOWN buttons.
A minimum of one degree (1F) is recommended.
zPress the PGM button to advance to 'EF' (Extended
Functions) and turn this setting 'On' via the UP or DOWN
button
zPress & Hold the PGM button to exit programming mode.
Select Desired Night Air Cooling Mode (NA1 or NA2):
zEnter program mode by pressing and releasing the PGM
button
zPress the PGM button until either one of the MODE LEDs
begins to blink or the word “OFF” flashes in the
SETPOINT window.
zPress and release the UP or DOWN button until the
desired MODE is selected. With extended functions (EF)
enabled, the controller will present several additional
operating modes. Use the UP or DOWN button to select
the desired Night Air Cooling mode which is indicated as
either “NA1” or “NA2” in TEMPERATURE display window.
zPress & Hold the PGM button to exit programming mode.
Configuring Temperature Probes
zEnter program mode by pressing and releasing the PGM
button
zPress the PGM button to advance to the 'CC' and turn
this menu item 'On' via the UP or DOWN button
zPress the PGM button to advance to 'CP' and set to 'P1'
via UP/DOWN buttons.
zPress the PGM button to advance to 'HP' and set to 'P2'
via UP/DOWN buttons.
zPress & Hold the PGM button to exit programming mode.

Night Air Cooling Mode #1 (NA1)
In Night Air Cooling Mode 1, the TC-1 will monitor inside and
outside air temperatures and determine the appropriate
method for keeping space temperature from exceeding the
temperature specified by Set Point 1 (SP1). A second set
point (SP2) is provided for the purposes of specifying the
maximum outside air temperature above which fresh air
ventilation shall be inhibited.
Adjusting Set Points (SP1 & SP2):
Initial adjustment of SP1 (desired space temperature) and
SP2 (maximum outside air temperature above which fresh
air ventilation will be inhibited) should be done
independently from each other to establish the desired offset
between space temperature and maximum allowable outside
air temperature. Once this initial temperature offset has
been specified, an alternate method of adjusting space
temperature (SP1) can be used that will automatically
preserve this offset.
TP-1
SPACETEMPERATURE
OUTSIDEAIR TEMPERATUR
E
TP-2
RELAY 1
FRESH AIR VENTILATION
AIR CONDITIONING
Use only shieldedCAT-5
cable to extend probe wiring
*
TC-1Controller w/ Night Air Cooling Firmware
RELAY 2
PROBE BUS

Set up - Intial Adjustment of Set Points
zEnter program mode by pressing and releasing the PGM
button
zPress the PGM button to advance to 'SP1' as shown in the
TEMPERATURE display window. This is the desired space
temperature set point. Ajust SP1 to the desired value using
the UP/DOWN buttons.
zPress the PGM button once again to advance to 'SP2'. This
is the maximum allowable outside air temperature set
point. Ajust SP2 to the desired value using the UP/DOWN
buttons.
zPress & Hold the PGM button to exit programming mode.
Operation - Adjusting Space Temperature
zPress and hold the PGM button.
zWhile holding the PGM button depressed, use the UP/DOWN
buttons to adjust the desired space temperature (SP1) as
shown in the SETPOINT display window. Note that when
SP1 is adjusted in this manner, SP2 is automatically
adjusted as needed to maintain the offset specified during
intial adjustment.
Simplified Logic:
If (TP1 >= SP1+dif) // space temperature higher than desired
{if (TP2<=SP2-dif)
Close_Relay1_Contacts // ventilate
else Close_ Relay2_contacts // outside air too hot, engage
mechanical cooling
}
else Open_Relays_1&2_contacts // set point satisfied, no cooling
required
Note: Operation of Relay 1 and Relay 2 are mutually
exclusive. If relay 1 is engaged, relay 2 will be disengaged
and vice-versa.

Night Air Cooling Mode #2 (NA2)
In Night Air Cooling Mode 2, the TC-1 will monitor inside and
outside air temperatures and trigger ventilation as appropriate to
maintain space temperature below Set Point 1 (SP1). Unlike NA1
mode, NA2 mode does not require the operator to manage a second
set point (maximum allowable outside air temperature). Instead,
NA2 mode triggers ventilation whenever outside air temperature is
lower than inside air temperature by twice the thermostat's
differential.
Operation - Adjusting Space Temperature
zPress and hold the PGM button.
zWhile holding the PGM button depressed, use the UP/DOWN
buttons to adjust the desired space temperature (SP1) as
shown in the SETPOINT display window.
Simplified Logic:
If (TP1 >= SP1+dif) // space temperature higher than desired
{if (TP2 <= TP1-(2*dif) )
Close_Relay1_Contacts // ventilate
else Close_ Relay2_contacts // outside air too hot, engage
mechanical cooling
}
else Open_Relay1_Contacts // set point satisfied, no cooling required
TP-1
SPACETEMPERATURE
OUTSIDEAIR TEMPERATUR
E
TP-2
RELAY 1
FRESH AIR VENTILATION
AIR CONDITIONING
Use only shieldedCAT-5
cable to extend probe wiring
*
TC-1Controller w/ Night Air Cooling Firmware
RELAY 2
PROBE BUS

Displaying Indoor and Outdoor Temperatures
With the configuration settings described in this addendum,
PROBE 1 represents space temperature, while PROBE 2 represents
outside air temperature.
Selecting a Probe Display
zPress / release the PGM button
until one of the PROBE indicators
begins to blink.
zUse the UP or DOWN button to
select the desired probe
Note: Upon exiting programming mode, the controller will
revert back to displaying the temperature of the probe
specified by the 'CP' parameter, which per this addendum is
TP1 or space temperature.