Nailor 37S Manual page 41

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 A7
COOLING WITH ON/OFF HOT WATER HEAT AND NIGHT CYCLE
Sequence of Operation:
Day/Occupied Cycle.
The terminal fan is interlocked by way of a positive pressure airflow switch, which
automatically energizes the fan upon sensing central system start up.
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.
Minimum and maximum primary airflow limits are adjusted underneath the thermostat cover.
Night/Unoccupied Cycle.
Airflow switch de-energizes fan upon loss of primary (central) air.
Upon a call for heat, the thermostat will override the airflow switch and will cycle the unit
fan followed by the supplementary heat intermittently to maintain setpoint temperature.
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 A7
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
AIRFLOW SWITCH
C NO
NC
❑ ❑
°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
UNOCCUPIED CYCLE (Central System Off).
DATE
8 - 6 - 08
LINE
VOLTAGE
N
GROUND
– +
24 VAC
TRANSFORMER
FAN
MOTOR
OCCUPIED CYCLE (Central System On).
TOTAL AIRFLOW
MIXING
HOT WATER HEAT
MINIMUM
COLD
- 2°F
SETPOINT
(-1.1°C)
ROOM TEMPERATURE INCREASE
Night Cycle.
INDUCED PLENUM AIR
HOT WATER HEAT
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
C
FAN
RELAY
NO
CAPACITOR
MAXIMUM
COOLING
HOT
+ 2°F
(+1.1°C)
NO
PRIMARY
AIR
HOT
35SWCD-A7