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heating coils, if supplied, are full on. See Table 30 for
pneumatic control troubleshooting.
5.
Adjust the "HI STAT" knob, with a 15 psi thermostat sig-
nal, to obtain the desired airflow setting. Depending on the
control sequence desired, the "HI STAT" knob will vary
either the minimum setting or the maximum setting as
follows:
DANC — "HI STAT" knob adjusts the maximum setting.
RANC — "HI STAT" knob adjusts the minimum setting.
DANO — "HI STAT" knob adjusts the maximum setting.
RANO — "HI STAT" knob adjusts the minimum setting.
6.
To adjust the thermostat reset start point, remove gauge
port ("G") cap and attach a 0 to 30 psi pressure gauge and
note the pressure reading. Adjust the thermostat pressure
to the controller, "T" port to the desired start point. Adjust
the "RESET START" knob until the gauge pressure begins
to change slightly. Remove pressure gauge and replace
cap.
7.
To adjust the thermostat reset span from standard 5 psi,
remove gauge port ("G") cap and attach a 0 to 30 psi pres-
sure gauge and note the pressure reading. Adjust the ther-
mostat pressure to the controller "T" port to the desired
start point. Adjust the "RESET SPAN" knob until the
gauge pressure equals the desired reset span. Remove
gauge and replace cap.
8.
To change logic from a given sequence to another, follow
the steps below:
a. To change from Normally Open (N.O.) to Normally
Closed (N.C.) or from N.C. to N.O., loosen the
"damper" dial screw and rotate the dial until the desired
damper position indicator is aligned with the arrow. The
VAV damper must be physically changed to desired
position.
b. To change from Direct Acting (DA) to Reverse Acting
(RA) or from RA to DA, no configuration changes are
required — use the appropriate calibration procedures
from above.
9.
Reconnect the power to the blower motor on the 45M,N
units.
NOTE(S):
1.
2.
Analog Controls Installation and Balancing Pro-
cedures
The Analog Electronic Control System is a pressure independent
volume reset control that uses a KMC CSP-4702 controller-
actuator (see Fig. 17).
Adjustments for the minimum and maximum airflow settings are
made at the thermostat. The thermostat (CTE-5202) operates on a
16 VDC power supply from the CSP 4702 controller and outputs a
0 to 10 VDC signal on the AO1 and AO2 terminals. AO1 is used
as the cooling output and AO2 is used as the heating output.
Thermostat Installation
For proper operation, mount the thermostat on an interior wall. Do
not mount the thermostat in a location that will cause it to be af-
fected by direct sunlight or other heat or cold sources. The thermo-
stat should be clear of all obstructions so it can properly sense the
room temperature. Complete rough-in wiring at each location pri-
or to thermostat installation. Cable insulation must meet local
building codes.
1.
2.
3.
4.
5.
Fig. 17 — CSP-4702 Controller/Actuator
35
The multi-function control system uses a KMC CSC 3000
series velocity controller with a rated air consumption of 1.00
SCFH at 20 psi main air pressure.
The maximum and minimum limits are both changed
when adjusting the center knob. The center knob should
always be set first.
Remove thermostat cover. If the thermostat is locked on
the back plate, turn the two hex screws in on the bottom of
the cover (in the two outermost holes) in the back plate
CLOCKWISE until they clear the cover. Do not remove
these screws completely. Swing the thermostat up and
away from the back plate to remove it.
Route the wires through the opening in the back plate.
Install the back plate directly to the junction box using the
screws supplied with the thermostat. Verify the hex screws
used for securing the cover are located at the bottom
before installing.
Connect the wires to the terminal block. Refer to the wir-
ing diagram located on the inside cover of the control
enclosure of each unit showing the wiring terminations.
Replace the thermostat cover. Turn the two hex screws
COUNTER CLOCKWISE until they are flush with the
bottom cover and secure it to the back plate.
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