Titus TA1 User manual

Installation Manual ANA-IOM-1.0 3-10-20
TA1/TA2 Controller, CTE-5202 Thermostat
Installation, Operation, and Maintenance Manual
General Information
Power Requirements
TITUS TA1/TA2 controllers operate on 24 VAC power. Power
required to operate the controller and actuator is 7 VA plus any output
loads for fan relays, heating contactors, and control valves (assume
10 VA each). Always switch control voltage off prior to disconnecting
any wires from the controller to prevent possible damage to control
components.
Damper Control
TITUS TA1/TA2 controllers provide pressure independent VAV control
for terminal primary air valves. Primary airflow volume is monitored by
means of a multipoint center-averaging velocity sensor located in the
inlet duct. Differential pressure is measured by an on-board platinum
ceramic transducer. Dampers are always shipped full open and move
counter-clockwise (CCW) to close. The primary damper opens and
closes to vary air volume to match cooling demand. Changes in static
pressure will result in damper position changes for a given flow
volume. In automatic changeover (ACO) sequences, the primary
damper also moves to match heating demand. If the primary fan
system is off and the terminal is calibrated to control a minimum flow
limit other than 0 cfm, the damper will drive full open. Flow limit
adjustments are at the thermostat (As shown in Figure 1).
Live Supply Volume Readout
A voltage output corresponding to actual primary air volume may be
monitored at the thermostat to assist in balancing and troubleshooting
these units. This output signal follows the same cfm vs DC voltage
calibration curve that is shown on Figures 4 and 5.
Supply Air Temperature Sensing
A duct-mounted thermistor is used to measure primary air
temperature in sequences involving automatic changeover (ACO) or
morning warm-up (MWU). It is fastened to the inlet duct with a
sheetmetal screw and wired to terminals ‘AI1’ and ‘┴’ on the
thermostat (As shown in Figure 2).
Alternatively, autochangeover and morning warm-up may be triggered
by a contact closure. When controller terminals ‘X’ and ‘Y’ are shorted
together, the unit will operate in the heating or morning warm-up
mode. When there is an open circuit between ‘X’ and ‘Y’, the unit will
operate in the cooling mode.
Night Setback/Unoccupied Signal
Units ordered with optional night setback (NSB) sequences employ a
differential pressure switch (As shown in Figure 3) to sense loss of
primary duct static pressure. By this method, these units change
operating mode when the air handler fan is de-energized.
Alternatively, night setback operation may be triggered by a 24 VAC
signal (10 mA) from a source external to the unit. Whenever 24 VAC
is applied to controller terminals ‘-NSB’ and ‘NSB’, unit will operate in
night setback mode.
Figure 1.
Figure 2.
Figure 3.
Pressure Switch

TA1 Controller Voltage vs. Airflow Curves
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
0 200 400 600 800 1000 1200 1400
Airflow (CFM)
Output Voltage (DC Volts)
4
5
6
7
8
9
TA1 Controller Voltage vs. Airflow Curves
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500 8000
Airflow (CFM)
Output Voltage (DC Volts)
10
12
14
16
8x14
8x18
16x24
ANA-IOM-2.0 3-10-20
Figure 4.
Figure 5.
Table 1. AeroCrossTM K-Factors
Terminal
Size
04
05
06
07
08
09
10
12
14
16
8x14
8x18
40(16x24)
K-Factor
(CFM)
273
360
448
667
904
1167
1436
1891
3015
3839
2106
2498
7176

ANA-IOM-3.0 3-10-20
Night Setback Temperature Adjustment
Adjustment of setback temperature is made by means of a plug-in resistor
(As shown in Figure 6). All TA1 controls provide a 47k ohm resistor that
provides an approximate 10° F setback in heating. Other 1/4 watt resistors
may be substituted in the field to achieve various setback temperatures
(see Table 2).
Fan Control
The TITUS TA1 provides sequencing for continuous and intermittent unit
fan operation. Fan relays with 24 VAC coils (10 VA max) are wired to
terminal ‘FAN/1’. Fan will run intermittently for parallel fan sequences if
jumper ‘J1’ on board is intact. Cutting jumper ‘J1’ will result in continuous
operation during occupied mode suitable for series fan sequences. Fan
volume adjustments are made with a screwdriver by means of a silicon-
controlled rectifier (SCR) or ECM Speed Controller located on the side of
the hi voltage control box. (As shown in Figure 7 and Figure 8)
On/Off Reheat Control
The TITUS TA1 provides sequencing for up to three stages of on/off heat.
Heat contactors with 24 VAC coils (10 VA max each) are wired to
terminals ‘Fan/1’, ‘1/2’, and ‘2/3’. Fan-powered sequences are limited to
two stages of heat. Two position, normally closed hot water valves (10 VA
max) are wired to ‘FAN/1’ for single duct sequences and ‘1/2’ for fan-
powered sequences. Jumper ‘J1’ must be intact to properly operate reheat
for single duct sequences.
Proportional Reheat Control
The TITUS TA1 provides sequencing for one stage of proportional heat.
Hot water valves with 0-10 VDC control signals (10 mA max) are wired
with (+) to terminal ‘T2’ on the thermostat and (-) to terminal ‘–’ on the
controller. (See Figure 6)
Thermostat Calibration
Thermostats are factory calibrated to specified flow limits. If field
adjustments are necessary, desired limit control can be calculated using
Table 1 and the following formulas, or Figures 4 and 5.
CFM = K[(0.1171 VDC) - 0.016]
VDC = {[CFM + (K x 0.016)]/(K x 0.1171)}
Voltage can be adjusted under ‘LIMITS’ menu in the thermostat (As
Shown on Figure 1). Always set minimum flow limits before setting
maximum flow limits. Voltages corresponding to desired flow limits are
modified using ‘UP’ and ‘Down’ arrows on thermostat under ‘LIMITS’ menu
(As Shown on Figure 1).
Table 2.
Figure 6.
Figure 7.
Figure 8.
Setback (oF) Resistance (K Ohm)
Setback Resistor Values
4.5
5.0
5.5
6.5
7.0
8.0
9.0
10.0
11.0
12.5
14.0
15.5
17.0
19.0
22.0
25.0
27.0
100
91
82
75
68
62
56
51
47
43
39
36
33
30
27
24
22

ANA-IOM-4.0 3-10-20
Single Duct Terminal Units Without Reheat
Thermostat Calibration Procedure
Press and hold both Up and Down arrows buttons for about 10
seconds until the display starts flashing “LIMITS”. Use Up or
Down arrow to display a flashing “SYSTEM”. Press “Set Point”
button. Select Sequence 01, SE01 and press “Set Point”
button, press Up or Down arrow to flashing “Exit”. Use Up or
Down arrows to navigate to “LIMITS” and press “Set Point”
Button. Set cooling minimum by adjusting voltage for A01 MIN
corresponding to desired minimum flow volume from Figures 4
and 5. Set cooling maximum by adjusting voltage for A01 Max
corresponding to desired maximum flow volume from Figures 4
and 5.
Optional Morning Warm-Up (MWU) Operation
If this option has been ordered, the unit damper will drive full
open regardless of flow limit settings whenever supply air
temperature is above 80° F.
Check-Out Procedure
Push the Setpoint button (or either Up/Down button) to display
the current setpoint value. Use the Up/Down buttons to change
the value below room temp. Press the Setpoint button again,
and the thermostat will control at the new setpoint. Observe
damper movement. After a few minutes check to see that the
unit has reached maximum flow limit.
Single Duct Terminal Units with Reheat
Thermostat Calibration Procedure
Press and hold both Up and Down arrows buttons for about 10
seconds until the display starts flashing “LIMITS”. Use Up or
Down arrow to display a flashing “SYSTEM”. Press “Set Point”
button. Select Sequence 02 SE02 and press “Set Point” button,
press Up or Down arrow to flashing “Exit”. Use Up or Down
arrows to navigate to “LIMITS” and press “Set Point” Button.
Set cooling minimum by adjusting voltage for A01 MIN
corresponding to desired minimum flow volume from Figures 4
and 5. Set cooling maximum by adjusting voltage for A01 Max
corresponding to desired maximum flow volume from Figures 4
and 5. Set heating minimum by adjusting voltage for A02 MIN
corresponding to desired minimum flow volume from Figures 4
and 5. Set heating maximum by adjusting voltage for A02 Max
corresponding to desired maximum flow volume from Figures 4
and 5. If no Auxiliary Flow is desired, set A01 Aux to 0.
Check-Out Procedure
Push the Setpoint button (or either Up/Down button) to display
the current setpoint value. Use the Up/Down buttons to change
the snowflake/cool value above room temp. Press the Setpoint
button again, and the thermostat will control at the new
setpoint. Observe damper movement. After a few minutes
check to see that the unit has reached maximum flow limit.
Push the Setpoint button (or either Up/Down button) to display
the current setpoint value. Use the Up/Down buttons to change
the fire/heat value above room temp. Press the Setpoint button
again, and the thermostat will control at the new setpoint.
Observe damper movement. After a few minutes check to see
that the unit has reached minimum flow limit.
Single Duct Terminal Units with Heating/
Cooling Autochangeover(ACO)
Thermostat Calibration Procedure
Snowflake/cool is the cooling setpoint used to control damper
operation when supply air is below 70° F. Fire/heat is the
heating setpoint used to control operation when supply air is
above 80° F.Press and hold both Up and Down arrows buttons
for about 10 seconds until the display starts flashing “LIMITS”.
Use Up or Down arrow to display a flashing “SYSTEM”.
Press “Set Point” button. Select Sequence 02 SE02 and press
“Set Point” button, press Up or Down arrow to flashing “Exit”.
Use Up or Down arrows to navigate to “LIMITS” and press “Set
Point” Button. Set cooling minimum by adjusting voltage for
A01 MIN corresponding to desired minimum flow volume from
Figures 4 and 5. Set cooling maximum by adjusting voltage for
A01 Max corresponding to desired maximum flow volume from
Figures 4 and 5. Set heating minimum by adjusting voltage for
A02 MIN corresponding to desired minimum flow volume from
Figures 4 and 5. Set heating maximum by adjusting voltage for
A02 Max corresponding to desired maximum flow volume from
Figures 4 and 5. If no Auxiliary Flow is desired, set A01 Aux to
0.
Check-Out Procedure
With primary fan system supplying cold air (below 70°F), Push
the Setpoint button (or either Up/Down button) to display the
current setpoint value. Use the Up/Down buttons to change the
snowflake/cool value above room temp. Press the Setpoint
button again, and the thermostat will control at the new
setpoint. Observe damper movement. After a few minutes
check to see that the unit has reached maximum flow limit.
With primary fan system supplying hot air (above 80°F), Push
the Setpoint button (or either Up/Down button) to display the
current setpoint value. Use the Up/Down buttons to change the
fire/heat value above room temp. Press the Setpoint button
again, and the thermostat will control at the new setpoint.
Observe damper movement. After a few minutes check to see
that the unit has reached minimum flow limit.
Fan Powered Terminal Units without Heat
Thermostat Calibration Procedure
Press and hold both Up and Down arrows buttons for about 10
seconds until the display starts flashing “LIMITS”. Use Up or
Down arrow to display a flashing “SYSTEM”. Press “Set Point”
button. Select Sequence 01, SE01 and press “Set Point”
button, press Up or Down arrow to flashing “Exit”. Use Up or
Down arrows to navigate to “LIMITS” and press “Set Point”
Button. Set cooling minimum by adjusting voltage for A01 MIN
corresponding to desired minimum flow volume from Figures 4
and 5.
Optional Morning Warm-Up (MWU) Operation
If this option has been ordered, the unit damper will drive full
open regardless of flow limit settings whenever supply air
temperature is above 80° F.
Optional Night Shutdown (NSD) Operation
Units ordered with optional night shutdown (NSD) sequences
employ a differential pressure switch to sense loss of supply
duct static pressure. By this method, these units change
operating mode when the air handler fan is de-energized. If this
option has been ordered, the unit fan will de-energize
whenever the air handler unit (AHU) is off. If a minimum flow
limit has been set at the thermostat, the unit damper will drive
full open.
Optional Night Setback (NSB) Operation
Units ordered with optional night setback (NSB) sequences
employ a differential pressure switch to sense loss of supply
duct static pressure.

By this method, these units change operating mode when the
air handler fan is de-energized. If this option has been ordered,
the unit fan will operate intermittently to maintain a temperature
setpoint approximately 10° F below the thermostat setting
whenever the air handler unit (AHU) is off. If a minimum flow
limit has been set at the thermostat, the unit damper will drive
full open.
Check-Out Procedure
Fan should be energized regardless of mode on series fan-
powered units (ATQS/ATFS/AFLS). Push the Setpoint button
(or either Up/Down button) to display the current setpoint value.
Use the Up/Down buttons to change the value above room
temp to energize fan on parallel fan-powered units (ATQP/
AFLP). Press the Setpoint button again, and the thermostat will
control at the new setpoint. Observe damper movement. After
a few minutes check to see that the unit has reached minimum
flow limit.
Check-Out Procedure (Night/Unoccupied Mode)
Push the Setpoint button (or either Up/Down button) to display
the current setpoint value. Use the Up/Down buttons to change
the value above room temp to energize fan. Press the Setpoint
button again, and the thermostat will control at the new
setpoint.
Fan Powered Terminal Units with Heat
Thermostat Calibration Procedure
Press and hold both Up and Down arrows buttons for about 10
seconds until the display starts flashing “LIMITS”. Use Up or
Down arrow to display a flashing “SYSTEM”. Press “Set Point”
button. Select Sequence 02 SE02 and press “Set Point” button,
press Up or Down arrow to flashing “Exit”. Use Up or Down
arrows to navigate to “LIMITS” and press “Set Point” Button.
Set cooling minimum by adjusting voltage for A01 MIN
corresponding to desired minimum flow volume from Figures 4
and 5. Set cooling maximum by adjusting voltage for A01 Max
corresponding to desired maximum flow volume from Figures 4
and 5. Set heating minimum by adjusting voltage for A02 MIN
corresponding to desired minimum flow volume from Figures 4
and 5. Set heating maximum by adjusting voltage for A02 Max
corresponding to desired maximum flow volume from Figures 4
and 5. If no Auxiliary Flow is desired, set A01 Aux to 0.
Optional Night Shutdown (NSD) Operation
Units ordered with optional night shutdown (NSD) sequences
employ a differential pressure switch to sense loss of supply
duct static pressure. By this method, these units change
operating mode when the air handler fan is de-energized. If this
option has been ordered, the unit fan will de-energize
whenever the air handler unit (AHU) if off. This will effectively
lock-out all heat operation. If a minimum flow limit has been set
at the thermostat, the unit damper will drive full open.
Optional Night Setback (NSB) Operation
Units ordered with optional night setback (NSB)
sequences employ a differential pressure switch to sense loss
of supply duct static pressure. By this method, these units
change operating mode when the air handler fan is de-
energized. If this option has been ordered, the unit fan and
heat will operate intermittently to maintain a temperature
setpoint approximately 10°F below the thermostat heating
setpoint whenever the air handler unit (AHU) is off. If a
minimum flow limit has been set at the thermostat, the unit
damper will drive full open.
Check-Out Procedure (Day/Occupied Mode)
Fan should be energized regardless of mode on series fan-
powered units (ATQS/ATFS/AFLS). Push the Setpoint button
(or either Up/Down button) to display the current setpoint value.
Use the Up/Down buttons to change the value above room
temp to energize fan on parallel fan-powered units (ATQP/
AFLP). Press the Setpoint button again, and the thermostat will
control at the new setpoint. Observe damper movement. After
a few minutes check to see that the unit has reached minimum
flow limit.
Check-Out Procedure (Night/Unoccupied Mode)
Push the Setpoint button (or either Up/Down button) to display
the current setpoint value. Use the Up/Down buttons to change
the value above room temp to energize fan. Press the Setpoint
button again, and the thermostat will control at the new
setpoint.
NOTE: LETTING THE MENU TIME-OUT (ABOUT 30
SECONDS) WILL NOT PREMANENTLY SAVE CHANGES.
Troubleshooting Procedures
Note: TURN OFF POWER BEFORE MAKING ANY WIRING
CHANGES TO THE UNIT FOR TROUBLESHOOTING.
To Check Operation of Controller’s Damper Output Circuit
and Actuator
Disconnect wire from terminal ‘T1’ on controller and put a wire
nut on it. If unit is equipped with morning warm-up or
autochangeover, disconnect wire from terminal ‘Y’ on controller
and put a wire nut on it. Connect a jumper wire between
terminals ‘16VDC’ and ‘T1”, and observe actuator driving full
open. Move jumper wire to connect terminals ‘-‘ and ‘T1’, and
observe actuator driving damper full closed. Remove jumper
wire and reconnect wires to terminals ‘T1’ and ‘Y’.
If Actuator Appears to be Inoperative
Check to see if the damper blade is free to move and that the
actuator gears are engaged. Press in the red linkage release
button on the actuator. It should be possible to turn the actuator
collar whenever this button is held down. After releasing the
button always check to make sure the collar is properly
engaged by attempting to turn it by hand. No movement should
be possible when the button is released.
To Check Operation of Controller’s On/Off Reheat Output
Circuit
Disconnect wire from terminal ‘TX REHEAT’ and put a wire nut
on it. Connect a jumper wire between terminals ‘16VDC’ and
‘TX REHEAT’ and observe that all the heat stages are
energized.
If Desired Thermostat Voltage Settings Cannot be
Achieved
Make sure that minimum flow limit setting is made prior to
setting maximum flow limit setting. If procedure are followed
correctly and problem persists, thermostat will need to be
replaced.
ANA-IOM-5.0 3-10-20

ANA-IOM-6.0 3-10-20
If Voltage Reading Float or Appears to be Unstable during
Thermostat Calibration
Check to make sure that the wire connecting ‘-‘ on the
controller to ‘┴’ on the thermostat is tight and properly
connected. This is the reference ground wire for the regulated
16VDC thermostat supply output. A loose connection will result
in unstable readings due in part to atmospheric static
electricity.
If Unit Fan Runs Intermittently During Day/Occupied
Operation on a Series Fan Powered Terminal
Check the ‘J1’ jumper on controller to see if it has been cut.
When this jumper is cut and removed, fan will run continuously
for Day/Occupied mode. This jumper should be left intact for all
applications other than series fan powered terminals.
Important Operational Note
To guarantee proper autochangeover operation, it is
recommended that minimum flow limits are used for both
heating and cooling modes. This allows airflow to constantly
pass through the unit for accurate supply air temperature
measurement.