JOHNSON CONTROLS
34
FORM 102.20-OM2
ISSUE DATE: 6/01/2015
SECTION 2 - START-UP AND OPERATION
FIGURE 27 -
PURGE ANGLE DETAIL
LD17223
7. Grease bearings using Dow Corning Molykote
BR2-plus Lithium based high pressure grease.
Apply the grease to the fitting while turning wheel
until a slight amount of grease is purged. Remove
visible grease residue from the bearing. The bear-
ings are filled with grease prior to shipment. This
step may be required if the units have been idle on
the job site for more than 6 months. Put belts back
on pulley.
8. If the unit is provided with a VFD, verify the mo-
tor is wired for the correct voltage provided by
the VFD.
NovelAire
®
Technologies
Start-Up Procedure
1. Does the rotor rotate freely by hand? If not, re-
check the seal to determine whether or not it is
binding and if so adjust seals following the in-
structions below.
2. Is the motor rotation correct? This can be checked
by detaching the belts from the drive sheave and
bumping the motor. The sheave should be rotat-
ing in the direction such that the belt will result in
rotation per the exterior markings. If not, rewire
the motor.
3.
Does the air flow orientation match up to design?
See the identification markings on the cassette.
4.
Are the belts on correctly and sufficiently tight?
Belt length is set by the manufacturer. Consult
NovelAire
®
Technologies if the belt appears too
loose.
5. Is the VFD programmed to control the unit and to
prevent frost formation? If not, follow the instruc-
tions in the manual accompanying the VFD and/
or consult NovelAire
®
Technologies.
Indirect Fired Gas Heat Start Up
For your safety, this product requires a
check, test, and start-up adjustment by a
qualified HVAC technician. Do not use for
temporary heat prior to start-up.
This gas burner has been carefully inspected and tested
at the factory; however, different conditions at the job
site, including controls that have been added at the time
of installation, require careful testing and final adjust-
ment for satisfactory operation. The Burner Test Re-
port/Factory Specification Sheet in each AHU shows
the general data recorded during the operation and
safety tests at the factory. This data should be used as a
general guide; with final data recorded on the start-up
form. Do not exceed 550°F flue temperature at the ID
fan inlet. Do not exceed 200°F supply air temperature.
Review the burner control literature, including wiring,
piping, cut sheets and drawings before attempting to
start this gas heating equipment.
All factory test start up burner specifications are locat-
ed on a laminated Burner Test Report/Factory Specifi-
cation Sheet located on the inside of the control panel
door. Each gas burner has been test run and inspected
at the factory. Adjustments to the component settings
are typically not required. However, measurements of
the system parameters should be taken and compared
to the measurements recorded on the burner test report,
to ensure safe and reliable operation.
Use the following instructions to start an indirect fired
gas heat system on an AHU.
Identify the Gas Burner Type
Two types of indirect fired gas burners are used on the
AHUs: Powerflame and the Eclipse series.
The Powerflame series offers a turndown (modulating
ratio) of 3:1 or 10:1. The Powerflame is easily identifi-
able by the motorized gas valve with external linkage
connecting the air dampers on the burner air inlet.
The Eclipse series uses an air/gas ratio regulator with
no external linkage, and has a turndown range of 10:1
to 25:1 (sometimes greater). A visible external plastic
tube is used to transmit gas pressure from the burner to
the regulator. No external linkage is used.
