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37- 1- 613 Page 18
SECTION 3
OPERATION
Future operating problems can be avoided if proper precautions are observed when the equipment is first put into
service.
Before starting under power, the blower should be turned over by hand to make certain there is no binding or
internal contact.
Each size blower has limits on pressure differential, running speed, and discharge temperature which must not be
exceeded. These limits are shown in the following tabulation.
GENERAL
– A new blower from the factory must be checked and serviced before operation. The blower must be
lubricated and operated according to the following instructions. Blower failure can be caused by operation at
above rated pressure or below rated minimum speed. Both cause excessive discharge temperature and seizure of
rotating parts.
STARTING BLOWER
– Start at reduced speed and no-load if possible. If speed is fixed, start without load by
bleeding discharge to atmosphere. Starting should be smooth and free of vibrations. After initial no-load start, and
operation is satisfactory, apply load gradually until maximum operating conditions are attained. BE SURE
OPERATING CONDITIONS ARE WITHIN BLOWER RATINGS. Maintain a close check for severe vibrations,
unusual noise, leaks and undue heating. The blower will gradually heat up due to compression, but after a
reasonable length of time, temperature will stabilize. With very cold ambient conditions, warm up blower at no-
load before going into full load service.
If the blower is used as part of a specific system, check the system
’s manual for any procedures that may be
necessary when starting the blower.
PRESTART CHECK (For New or Overhauled Blower)
– see “Blower Startup Checklist,” page 24.
ROTATION
– Facing the main rotor drive shaft, rotation is clockwise when the shaft extension is at discharge end,
and counterclockwise when the shaft extension is at the inlet end. An arrow indicating rotation is attached to the
blower end cover near the drive shaft.
DAILY CHECK
1. Air filter tight, clean and serviced.
2. Proper oil level in oil sumps.
3. Observe pressure.
4. Relief valve functions.
5. Blower turns freely.
Over tightening belts lead to heavy bearing loads and premature failure.
R
Series
Models
Drive Shaft
Speed
(RPM)
Discharge
Pressure*
Sea Level (PSIG)
Dry Vacuum*
(Inches Hg.)
Wet
Vacuum*
(Inches Hg.)
5CDL5, 5CDL9, 5CDL13
5CDL5, 5CDL9, 5CDL13
5000
4000
20
---------
17
--------
--------
24
*
Pressures or vacuums are gauged at immediate blower discharge or inlet. For suggested maximum rat-
ings at reduced speeds, see Figure 3-6, page 22.
FIGURE 3- 1 – MAXIMUM RATING