Specifications

JOHNSON CONTROLS
13
FORM ET102.19-NOM1 (809)
FIRST TIME MOTOR STARTUP
Check to see that all power to the equipment is off. Be
sure that the motor shaft is disconnected from the load,
and will not cause fan rotation.
1. Make sure that the mechanical installation is se-
cure. All bolts and nuts are tightened etc.
2. Ensure that all construction debris is removed from
inside of equipment.
3. Check lubrication of fan, motor bearings and
damper linkage
a. Note that all bearings are shipped completely
full of grease for corrosion protection. Bear-
ings may run warm temporarily on startup
until excess grease has discharged.
b. Check tightness of bearing setscrews or lock-
ing collars. Also, check tightness of setscrews
on fan wheel and sheave.
c. Hand operate all damper linkage, to check
freedom of movement.
4. If equipment has been in storage or idle for some
time, check winding insulation integrity with meg-
ger.
5. Inspect all electrical connections for proper ter-
minations, clearance, mechanical strength and
electrical continuity.
6. Be sure that all shipping materials, braces, and
construction debris are out of equipment.
7. Manually rotate motor shaft to ensure that it rotates
freely.
8. Replace all panels that were removed during instal-
lation.
9. Momentarily apply power and check direction of
rotation of motor shaft.
10. If motor rotation is wrong, be sure power is off and
change the motor lead connections, verify rotation
before you continue.
11. Start motor and ensure operation is smooth without
excessive vibration or noise. If so, run the motor
for 1 hour with no load connected.
12. After 1 hour of operation, disconnect power and
connect the load to the motor shaft. Ensure that
motor is properly ventilated.
Air Balancing
When units are supplied with a variable pitch motor
sheave, they are as a rule set to the mid rpm range.
Field adjustment may be necessary to achieve required
airow. See Drive Section of this IOM for variable pitch
sheave adjustment instructions.
When the final field alterations are concluded the
current draw of the motors should be checked and
compared to the full load current rating of the motor.
The amperage must not be above that shown on the
motor nameplate.
Sheaves
Upon completion of the air balance, it is a common
industry recommendation that the variable pitched
motor sheave be replaced with a properly sized xed
sheave. A matching xed sheave will provide longer belt
and bearing life and vibration free operation. Initially, it
is best to have a variable pitched motor sheave for the
purpose of air balancing, but once the balance has been
achieved, xed sheaves maintain balance and alignment
more effectively. See Drive Section of this IOM for
variable pitch sheave adjustment instructions.
PERIODIC MAINTENANCE AND SERVICE
General
The following checklist is provided as an abbreviated
guide to periodic maintenance. Detailed procedural
information is given after this checklist.
After 48 Hours of Operation
Belts will achieve their permanent stretch and will
require re-adjustment, make sure not to over-tighten. See
Belt Section of this IOM for adjustment instructions.
Weekly
Observe unit weekly for any changes in running
condition and unusual noise.
Every Month
• Check air lters. Clean or replace if clogged or
dirty.
• Re-lubricate fan bearings if operating conditions
include high speeds, moist or dirty air, or high
temperatures.
• Re-lubricate motor bearings in accordance with
motor manufacturer’s recommendations if op-
erating conditions include high speed, moist or
dirty air, or high temperatures. See motor label.
• Check and adjust fan belt tension.