9
ANALOG CONTROLS
Balancing Procedures (Control Sequences
2400, 2440, 2470) —
The
analog
electronic
control
system is a pressure independent volume reset control that uses
KMC Controls CSP-5001 controller-actuator. See Fig. 7.
The system provides for independently adjustable set points
for minimum, maximum, and auxiliary airflow limits.
Room temperature control is provided by the associated
room thermostat which is selected according to the application.
The room thermostat provides a fixed 2 degrees F reset span re-
gardless of the minimum and maximum velocity limit set
points.
Adjustments for the minimum and maximum airflows are
made at the thermostat.
The thermostat (CTE-5100 Series) operates on a 16 vdc
power supply from the CSP controller and outputs a 0 to
10 vdc signal on the T terminals; T
1
in the cooling mode (DA
[direct acting]) and T
2
in the heating mode (RA [reverse
acting]). See the reference sequence diagram on unit for details
on which ‘T’ terminals are used on each model thermostat, but
in general T
1
and T
3
are used for the cooling mode, T
2
and T
4
for heating. Terminals T
1
and T
2
are adjustable to limit mini-
mum and maximum flow. Terminals T
3
and T
4
have a fixed
0 to 10 vdc output signal.
1. Required tools:
a.
1
/
16
in. hex/key wrench
b. Small flat blade (
1
/
8
in.) screwdriver
c. Digital voltmeter capable of displaying a 0 to
10 vdc range which will display in hundredths of
vdc
d. HSO-5001 Test Leads (optional for meter taps)
2. Remove thermostat cover.
Thermostat cover is removed by loosening the setscrews
on each side of the thermostat. Using a
1
/
6
in. hex/key
wrench turn the setscrews clockwise until cover is loose.
3. Check voltages.
Verify 16 vdc between (+) and (–) terminals.
Applications for Dual Duct (Minimum Air From
Cold Duct) —
Dual duct applications are easily accom-
plished by connecting two CSP-5001 Series controllers with a
dual set point (RA/DA) thermostat, as shown in Fig. 8. In this
application the CSP controllers are mounted separately on the
cold and hot deck dampers with each utilizing its own flow
sensor. The cold deck utilizes the T
1
signal from the thermostat
while the hot deck controller receives its requested flow signal
from T
2
. Both units can be set independently for minimum and
maximum flow settings. In addition, by using the “R” override
terminal on the thermostat cold deck, minimum flow can be
overrided to zero upon a call for heating (or vice-versa). See
Fig. 9 and 10.
HEATING MAX
T2
T1
HEATING MIN
COOLING MAX
COOLING MIN
RISE IN ROOM TEMPERATURE
HTG. S.P.
CLG. S.P.
HEATING MAX
T2
T1
HEATING MIN
COOLING MAX
COOLING MIN
RISE IN ROOM TEMPERATURE
HTG. S.P.
CLG. S.P.
Fig. 10 — Minimum Air From Heating
Fig. 8 — Dual Control Connections
Fig. 9 — Minimum Air From Cooling
Minimum Air From Cooling*
Minimum Air From Heating*
*Connect jumper from T2 to R1 to override cooling minimum to zero, upon
call for heating. Leave R2 connected to ground.
*Connect jumper from T1 to R2 to override heating minimum to zero, upon
call for heating. Leave R1 connected to ground.
ccw cw
E
C
RED-CLS
GRN-OPN
LED
METER
24V
AC
– +
I
N
NOR
MAX
MIN
N
O
M
M
A
X
%
M
I
N
˜
–
–
16
V
DC
O
U
I
H
L
45
90
0
∆
P PORTS
GEAR
DISENGAGEMENT
BUTTON
ADJUSTABLE
END STOPS
0-10V VELOCITY OUTPUT
0-10V INPUT SIGNAL
16V DC OUTPUT
(THERMOSTAT POWER)
COMMON (16V DC,
INPUT, OUTPUT)
POWER
SUPPLY
16
V
DC
I
N
O
U
T
24 V
AC
WIRING
–
–
˜
Fig. 7 — CSP-5001 Controller
Summary of Contents for 35L Series
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