Nailor 37S Manual page 39

CSP-5002
CONTROLLER/ACTUATOR
DAMPER
CW TO
CLOSE
BALANCING
TEES
16 I O –
V N U
DC T
24" (610)
LENGTH
1/4" (6) O. D.
TUBING TO
DIAMOND
FLOW
SENSOR
FACTORY
WIRING/PIPING
FIELD WIRING
CONTROL SEQUENCE A3
COOLING WITH ON/OFF HOT WATER HEAT (CONTINUOUS
OPERATION)
Sequence of Operation:
Fan runs continuously, providing constant volume to the space.
With room temperature at set point, unit delivers minimum cooling airflow and maximum
induced plenum air. On a rise in room temperature, the thermostat regulates the
controller/actuator to increase primary airflow.
As more cold air is supplied to the fan section, less warm air is induced from the ceiling plenum.
When the room temperature exceeds the setpoint by 2°F (1.1°C) or more, primary
airflow is maintained at the maximum setting. The maximum setting is usually the same
as the total fan volume setting.
On a decrease in room temperature, the thermostat regulates the controller/actuator to
decrease the airflow and as less cold air is supplied to the fan section, more warm air is
induced from the ceiling plenum. If room temperature continues to drop, minimum
primary airflow is maintained and at 0.8°F (0.4°C) below setpoint, the on/off hot water
valve is energized.
An increase in room temperature de-activates the heat at 0.4°F (0.2°C) below setpoint.
Primary airflow is held constant in accordance with thermostat demand. Any changes in
duct air velocity due to static pressure fluctuations are sensed and compensated for,
resulting in pressure independent control.
Notes:
1. Cooling and heating setpoints can be adjusted to be within 1°F (0.55°C) from each other.
(Minimum and maximum primary airflow limits are adjusted underneath the thermostat cover).
2. Constant volume series terminal fans should be interlocked to be energized ahead of
or when the central system fan starts, to prevent backflow of primary air into the ceiling
plenum and to prevent possible backward rotation of the terminal fan.
Options:
Thermostat Scale Plate:
(Thermostat includes backing plate for 2" x 4" electrical box).
SCHEDULE TYPE:
PROJECT:
ENGINEER:
CONTRACTOR:
Nailor Industries Inc. reserves the right to change any information concerning product or pricing without notice.
ANALOG ELECTRONIC CONTROL
FAN POWERED TERMINAL UNIT • SERIES FLOW
CONSTANT VOLUME • PRESSURE INDEPENDENT
MODELS: 35SW, 35SWST, 37SW AND 37SWST A3
V
N M M
N
O A I
O
–
R X N
M
24V
M
A
METER
AC
X
%
RED-CLS
M
GRN-OPN
I
N
C
LED
L
CCW CW O
S
E
❑ ❑
°F or °C
CTE-5101 ROOM THERMOSTAT (DA)
SINGLE TEMP. SET POINT
12
V1 T3 R1 T1 + V A –
TERMINAL
V1 T3 T1 + –
BLOCK
TERMINAL
BLOCK
TO ON/OFF
HOT WATER VALVE
24 VAC 10 VA MAX.
(BY OTHERS)
REE-5002
REHEAT RELAY MODULE
DATE
8 - 6 - 08
LINE
VOLTAGE
N
GROUND
– +
24 VAC
TRANSFORMER
FAN
MOTOR
TOTAL AIRFLOW
MIXING
HOT WATER HEAT
MINIMUM
COLD
- 2°F
SETPOINT
(-1.1°C)
ROOM TEMPERATURE INCREASE
B SERIES SUPERSEDES DRAWING NO.
3500 12 - 2 - 02
H
TOGGLE
DISCONNECT
SWITCH
(OPTIONAL)
SPEED
CONTROLLER
CAPACITOR
MAXIMUM
COOLING
HOT
+ 2°F
(+1.1°C)
35SWCD-A3