Titus Pneumatic User Manual

Installation Manual

TITUS I, II, and IIA Pneumatic Controls

Installation, Operation, and Maintenance Manual

Adjusting Minimum and Maximum Air Flow

PNEU-IOM-1.0 5-2-05

Airflow limits are printed on the label on the
optional controller cover (or the side of the
terminal) and the side of the controller (Figures
2 and 3).

If field adjustment becomes necessary, follow
the procedure outlined below.

AIR FLOW ADJUSTING PROCEDURES FOR
ALL CONTROLLERS

Figure 1. Adjusting Air Flow

(See Figure

3)

(Label, See Figure 3)

1. Remove the optional controller cover
(Figure 1).

2. The action of the controller must match the
settings printed on the labels (Figures 2
and 3).
a. TITUS I—Direct acting, normally

open, (control color—beige).

b. TITUS I—Reverse acting, normally

closed, (control color—gray).

c. TITUS IIA—Direct or reverse acting

thermostat. No adjustment necessary.

d. TITUS IIA—Verify setting on damper

dial is correct (N.O. or N.C.).

e. TITUS II—Check thermostat and

damper compatibility selectors, verify
that settings are as marked on the
label.

3 Remove the caps from the tees in the HI

and LO tubes (red and green stripe).
Connect a manometer gauge to both tees
(gauge with a 0 to 2 inch scale is
recommended).

4. Refer to the calibration curve for
terminal being serviced (Page 8). From the
curve read the differential pressure across
the sensor for the required airflow.

5. For instructions to readjust the control refer
to:
a. TITUS I See page 3.
b. TITUS IIA See page 4-5.
c. TITUS II See page 6-7.
d. For dual duct terminals, see document

PNEU-DD-IOM.

e. Quick-Check. See page 2.

6. After the flow rates are adjusted:
a. Replace the thermostat connection to

the controller.

b. Remove the gauge and replace the

caps on the tees.

c. Replace the optional controller cover.

the size

Figure 2. Unit Label

MODEL NO: PESV
TOTAL CFM: 600
TITUS II NO RA COOL
MIN. CFM: 160
FACTORY NO:XXXXX

Figure 3. Controller Label

SIZE: 08
VP: .410

VP: .030

ITEM: 1

Quick-Check Procedure for TITUS I, II, and IIA Controllers

PNEU-IOM-2.0 5-2-05

Preparing for Calibration

1. Disconnect the actuator tube
(yellow stripe) from controller
Port B.

2. Connect squeeze bulb with 0 to 25
PSI gauge to the actuator.

3. Connect 0 to 25 PSI gauge to
controller Port B (Figure 4).

A. Direct Acting Cooling or Reverse

Acting Heating

1. Apply zero PSI to thermostat
Port T.

2. Read the differential pressure for
the desired Minimum CFM from the
calibration curve corresponding to
the inlet size of the terminal being
calibrated (Page 8).

3. Pump the squeeze bulb until the
desired differential pressure is read
on the manometer gauge.

4. Adjust the LO knob on the face of
the controller until the gauge on
Port B reads 7.5 PSI ± 1.0 PSI.

5. Read the differential pressure for
the desired Maximum CFM from the
calibration curve corresponding to
the inlet size of the terminal being
calibrated (Page 8).

6. Pump the squeeze bulb until the
desired differential pressure is read
on the manometer gauge.

7. Adjust the HI knob on the face of
the controller until the gauge on
Port B reads 7.5 PSI ± 1.0 PSI.

8. Remove gauges and reconnect
actuator to controller Port B.

NOTE: If the actuator fails to respond,
see Guide to Service Procedures.

RED

GR EEN

LOHI

ESV

SENSOR

YELLOW

YELLOW

GAUGE

0-25 PSI

SQUEEZE

BULB

5-10 PSI

ACTUATO R

Figure 4. Controller Setup

B. Reverse Acting Cooling or Direct

Acting Heating

For TITUS I Controllers

1. Apply zero PSI to thermostat
Port T.

2. Read the differential pressure for
the desired Maximum CFM from the
calibration curve corresponding to
the inlet size of the terminal being
calibrated (Page 8).

3. Pump the squeeze bulb until the
desired differential pressure is read
on the manometer gauge.

4. Adjust the HI knob on the face of
the controller until the gauge on
Port B reads 7.5 PSI ± 1.0 PSI.

5. Read the differential pressure for
the desired Minimum CFM from the
calibration curve corresponding to
the inlet size of the terminal being
calibrated (Page 8).

6. Pump the squeeze bulb until the
desired differential pressure is read
on the manometer gauge.

7. Adjust the LO knob on the face of
the controller until the gauge on
Port B reads 7.5 PSI ± 1.0 PSI.

8. Remove gauges and reconnect
actuator to controller Port B.

NOTE: If the actuator fails to respond,
see Guide to Service Procedures.

For TITUS II Controllers

1. Apply 15 to 25 PSI to thermostat
Port T.

2. Read the differential pressure for
the desired Minimum CFM from the
calibration curve corresponding to
the inlet size of the terminal being

WHI TE

LO

BLUE

MAIN AIR
(15-25 PSI)

ROOM THERMOSTAT
(0-15 PSI)

HI

PNEUMATIC

CONTROLLER

B

TM

GAUGE

0-25 PSI

0-2" W.G.
MANOMETER

calibrated (Page 8).

3. Pump the squeeze bulb until the
desired differential pressure is read
on the manometer gauge.

4. Adjust the LO knob on the face of
the controller until the gauge on
Port B reads 7.5 PSI ± 1.0 PSI.

5. Read the differential pressure of the
desired Maximum CFM from the
calibration curve corresponding to
the inlet size of the terminal being
calibrated (Page 8).

6. Pump the squeeze bulb until the
desired differential pressure is read
on the manometer gauge.

7. Adjust the HI knob on the face of
the controller until the gauge on
Port B reads 7.5 PSI ± 1.0 PSI.

8. Remove gauges and reconnect
actuator to controller Port B.

NOTE: If the actuator fails to respond,
see Guide to Service Procedures.

For TITUS IIA Controllers

1. Apply zero PSI to thermostat Port T.

2. Read the differential pressure for
the desired Maximum CFM from the
calibration curve corresponding to
the inlet size of the terminal being
calibrated (Page 8).

3. Pump the squeeze bulb until the
desired differential pressure is read
on the manometer gauge.

4. Adjust the LO knob on the face of
the controller until the gauge on
Port B 7.5 PSI ± 1.0 PSI.

5. Read the differential pressure for
the desired Minimum CFM from the
calibration curve corresponding to
the inlet size of the terminal being
calibrated (Page 8).

6. Pump the squeeze bulb until the
desired differential pressure is read
on the manometer gauge.

7. Adjust the HI knob on the face of
the controller until the gauge on
Port B reads 7.5 PSI ± 1.0 PSI.

8. Remove gauges and reconnect
actuator to controller Port B.

NOTE: If the actuator fails to respond
see Guide to Service Procedures.

Calibration Procedure for TITUS I Controller

PNEU-IOM-3.0 5-2-05

A. Direct Acting (Beige). (N.O.)

b. Refer again to the calibration

curve (Page 8) to determine

1. Adjusting minimum air flow:
a. Apply zero PSI signal to Port T

on the controller.

b. If the minimum CFM equals

zero, the damper should
assume a closed
position (observe the indicator
on the end of the damper

the differential pressure
necessary for the required
maximum CFM.

c. Adjust the HI knob on the

controller until the manometer
gauge reads the required
differential pressure from the
curve.

shaft). If not, adjust LO knob on
the controller until the
compressed air drives the

NOTE: If actuator fails to respond,
see Guide to Service Procedure.

damper closed.

c. If a non-zero minimum CFM is

B. Reverse Acting (Gray). (N.C.)

required, read the differential
pressure for the desired CFM
from the calibration curve
corresponding to the inlet size
of the terminal being calibrated
(Page 8).

d. Adjust the LO knob until the

desired differential pressure is
read on the manometer gauge.
Allow several seconds for the
controls to react to system
pressure and stabilize.

1. Adjusting maximum air flow:
a. Apply zero PSI signal to Port T

on the controller.

b. Refer to calibration chart (Page

8). Read the differential
pressure for the desired
maximum CFM from the curve
corresponding to the inlet size
of the terminal being
calibrated.

c. Adjust the HI knob on the

controller until the desired

2. Adjusting maximum air flow:

differential pressure is read on

a. Apply 15-25 PSI signal to

Port T on the controller.

the manometer gauge. Allow
several seconds for the
controls to react to the system
and stabilize.

2. Adjusting minimum air flow:
a. Apply 15-25 PSI signal to

Port T on the controller.

b. If minimum CFM equals zero,

the damper should assume a
closed position (observe
indicator on the end of the
damper shaft). If not, adjust the
LO knob until the damper
closes.

c. If a non-zero minimum CFM is

required, read the differential
pressure for the required CFM
from the curve (Page 8).

d. Adjust the LO knob on the

controller until the manometer
gauge reads the desired
differential pressure from the
curve.

NOTE: If actuator fails to respond,
see Guide to Service Procedures.

Table 1.

Thermostat

Action

Color Low Port Signal

Direct Beige Y X

Reverse Grey X Y

HI

SENSOR

LO

ACTUATOR

YELLOW

BLUE
WHITE

ROOM THERMOSTAT
(0-15 PSI)

MAIN AIR (20-25 PSI)

H L

MAGNAHELIC

GAUGE

(0-20" WG)

Figure 5. Titus I Controller

High Port

Signal

RED

GREEN

LO

INCREASE

LOLO

HI

INCREASE

HI

M

LO

DIRECT ACTING CONTROLLER
X
Y

B

T

REVERSE ACTING CONTROLLER

HI

BEIGE

HI

INCREASE

LO

LO

INCREASE

HI

GRAY