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Maintenance Procedures
Warning: Electrical Hazard!
Before Servicing, disconnect all sources of electrical power,
including the complete discharge of any electric current stored
in capacitors included in the wiring structure. Practice good
lockout/tagout procedures to prevent energizing of the unit
during servicing. Failure to comply with previous statements
could yield personal injury or even result in death.
Fan and Motor
Nailor fan powered terminal units are equipped with permanently
lubricated motors. Inspect fan and motor assembly for dust and dirt as
often as dictated by operating environment. Clean assembly if necessary.
If fan motor does not run, do the following:
a. Check for free rotation of blower wheel. Make sure no foreign
objects are in fan. Look for signs of freight or job site damage.
b. Check power supply. Disconnects should be in the "ON" position.
Optional fusing should also be inspected. Check transformer for
proper output.
c. Check for proper control signals and PE switch setting (if provided)
and relay function.
Fan motor runs but emits excessive noise
a. Maximum airflow may be too high, or discharge static pressure
may be incorrect.
b. Blower may have clearance problems. Make sure all components
are securely attached.
c. Verify integrity of ductwork. Leaks or loose connections could
cause noise. Check for rattling diffusers or rattling or incorrectly
adjusted balancing dampers.
Fan motor runs, but airflow too low:
a. May be due to ductwork restrictions, dirty air filters or clogged
water coils.
Label Example
Date
(Date)
Model
(Modèle)
Unit Size-Inlet Size
(Diamètre D'Entrée)
Control Voltage
(Voltage De Contrôle)
Control Sequence
(Séquence De Contrôle)
Volt Amp
(Volt-Ampère)
Hot Water Coil Rows
(Nombre De Rangées Serpentin Eau Chaud)
Chilled Water Coil Rows
(Nombre De Rangées Serpentin Eau Froid)
KW/HP
Each Cir.
Total
(Chaque
(Totale)
Circuit)
13.00
13.00
Heater (Chauffage)
0
Motor (Moteur)
Total (Totale)
Each Element Rated @
(Chaque Element Classifier A)
Use wire suitable for at least 75 °C,
L1 is color coded black, L2 is blue, L3 is red,
Control wires coded as marked,
Use copper conductors only.
Primary CFM (Max/Min) :
7-6-23 IOM-FPTU
Nailor Industries, Inc. reserves the right to change any information concerning product or specification without notice or obligation.
Fan Powered
Terminal Unit
:
5-Jul-2023
Serial No.
Tag No.
:
D35SE
Voltage
:
3-8
Phase
:
24
Stages
:
DF
HZ
Motor HP
:
50
Motor Voltage
:
Motor Amp
:
Amps (Ampères)
Each Stg.
Each Cir.
Each Stg.
Total
(Chaque
(Chaque
(Chaque
(Totale)
Étape)
Circuit)
Étape)
6.50
62.5
62.5
31.25
0
62.50
KW
@
3.25
208
890 / 360
Primaire PCM (Max.Min):
Fan CFM :
890
Ventilateur PCM:
Fan Powered
Terminal Unit
b. Readjust fan speed control on control card.
c. Discharge static pressure may be incorrect. Check balancing dampers.
d. Confirm signal from the motor card to the motor by measuring the
plug at the motor.
If repair or replacement is required
Disconnect all power before servicing. Motor and fan should be
removed as an assembly. Remove the four hex nuts from mounting
lugs holding the fan assembly to the discharge panel, and remove
the assembly through any convenient access panel. Do not allow
assembly to hang from wiring. If removing motor from blower, first
loosen the set screw holding the blower wheel to the motor shaft.
Remove the three screws holding the motor to the fan housing, and
slide motor and fan housing apart.
To put the assembly back together, reverse the procedure. Be sure
to align the blower set screw with the flat section of motor shaft.
Note: Over-tightening motor mounting screws may
crush isolation bushing, causing excessive fan noise.
NOTE
Primary Air Damper Replacement
Nailor's primary air valve assembly is not repairable. The entire
assembly should be replaced if it is damaged.
Labels
Each fan powered terminal unit is shipped with a nameplate label
affixed to the control casing. Principle nameplate data on the label
typically include Order-Serial number, Model number, Unit Size,
Motor horsepower, Amperage, MOP, Heater (if present) data, Supply
voltage and Airflows. Also provided are calibration, airflow, as well as
other labels as necessary. We suggest that you read all labels before
beginning installation. If you have any questions, please contact your
local Nailor Representative. Their phone numbers can be found on
our website at nailor.com.
(Unite Terminale @
Ventilateur Intégré)
:
155258-10
(No. De Série)
:
42
(No. D'étiquette)
:
208
(Voltage)
:
1
(Phase)
:
2
(Étapes)
:
60
(HZ)
:
0
(Moteur HP)
:
208
(Voltage Du Moteur)
:
0
(Ampérage Du Moteur)
Ampacity (Ampacitée)
Max. Overcurrent Protection
(Resistance Des Fusible Max.)
Each Cir.
Each Stg.
Total
Total
(Chaque
(Chaque
(Totale)
(Totale)
Circuit)
Étape)
78.13
39.07
39.07
80
0.00
78.13
VAC.
AWG. Min Wire Size (Min Diamètre De Fil) :
Min. Heating CFM (Min. PCM) :
Utiliser un fil métallique qui convient au moin 75 °C,
L1 est colore noire, L2 est blue, L3 est rouge,
Les fils de contrôle son identifiée comme marque,
Utilise des conducteurs de cuivre seulement.
Primary L/S (Max/Min) :
Primaire L/S (Max.Min):
Fan L/S :
Ventilateur L/S:
(Unite Terminale @
Ventilateur Intégré)
Internal Fuse Size
Each Cir.
(If Supplied)
(Chaque Circuit)
40
80
15
N/A
4
910.00
420 / 170
420
Page 3 of 10
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