Special Precautions; Important - Modine MDB Série Manuel D'installation Et De Maintenance

sPecial Precautions

THE INSTALLATION AND MAINTENANCE INSTRUCTIONS IN
THIS MANUAL MUST BE FOLLOWED TO PROVIDE SAFE,
EFFICIENT AND TROUBLE-FREE OPERATION. IN ADDITION,
PARTICULAR CARE MUST BE ExERCISED REGARDING
THE SPECIAL PRECAUTIONS LISTED BELOW. FAILURE
TO PROPERLY ADDRESS THESE CRITICAL AREAS COULD
RESULT IN PROPERTY DAMAGE OR LOSS, PERSONAL
INJURY, OR DEATH. THESE INSTRUCTIONS ARE SUBJECT
TO ANY MORE RESTRICTIVE LOCAL OR NATIONAL CODES.
hazard intensitY levels
1. danGer: Indicates an imminently hazardous situation
which, if not avoided, WILL result in death or serious injury.
2. WarninG: Indicates a potentially hazardous situation which,
if not avoided, COULD result in death or serious injury.
3. caution: Indicates a potentially hazardous situation which,
if not avoided, MAY result in minor or moderate injury.
imPortant: Indicates a situation which, if not avoided,
4.
MAY result in a potential safety concern.
danGer
Appliances must not be installed where they may be
exposed to a potentially explosive or flammable atmosphere.
WarninG
1. Do not install direct-fired units down stream from any
cooling system which utilizes refrigerants for cooling.
2. All field gas supply lines should be pressure/leak tested
prior to operation. Never use an open flame. Use a
soap solution or equivalent for testing.
3. Gas pressure to the unit controls must never exceed pressure
shown on the unit's rating plate. The unit and its individual
shutoff valve(s) must be disconnected from the gas supply
during any pressure in excess of 1/2 psig (3.5 kPa).
4. For test pressure less than 1/2 psig (3.5 kPa), the unit's
gas control must be isolated from the supply gas piping
by closing the unit's manual shutoff valve(s).
5. For indoor units, where required by Code, use a dedicated
line for venting gas to the outside of the building.
6. Disconnect power supply before making wiring connections
to prevent electrical shock and equipment damage.
7. If equipped with the Deadfront Disconnect Switch option,
when the switch is in the "OFF" position, supply power
remains energized at the supply power terminal strip
and the top of the dead front disconnect switch. When
providing service on or near these terminals, building
supply power to the unit should be de-energized.
8. All appliances must be wired strictly in accordance
with the wiring diagram furnished with the unit. Any
wiring different from the wiring diagram could result in a
hazard to persons and property.
9. Any original factory wiring that requires replacement
must be replaced with wiring material having a
temperature rating of at least 105°C.
10. Ensure that the supply voltage to the appliance, as indicated
on the serial plate, is not 5% greater than the rated voltage.
11. When servicing or repairing this equipment, use only
factory-approved service replacement parts. A complete
replacement parts list may be obtained by contacting
Modine Manufacturing Company. Refer to the rating
plate on the unit for complete appliance model number,
serial number, and company address. Any substitution
of parts or controls not approved by the factory will be
at owner's risk.
2
caution
1. For model MDB (100% Make Up Air) units, adjustments
to the position of the burner opening baffles are
permitted when instructions herein are properly
followed. For model MRB (Return Air) units, the baffles
for the burner, burner bypass, and return air openings
must not be modified or adjusted.
2. Purging of air from gas supply lines should be
performed as described in ANSI Z223.1 – latest edition
"National Fuel Gas Code", or in Canada in CAN/CGA-
B149 codes.
3. Since a failure of the unit may affect the proper operation
of other fuel burning equipment in the building, the unit
shall be electrically interlocked to open balancing air
inlet dampers, or other such devices.
4. Do not operate unit with a gas input rate greater than
that shown on the unit's rating plate.
5. When using a drill bit to clean the burner gas ports, do
not distort or enlarge the ports. Do not use a power drill.
6. Ensure that the supply voltage to the appliance, as indicated
on the serial plate, is not 5% less than the rated voltage.
7. Do not reuse any mechanical or electrical component
which has been wet. Such component must be replaced.

imPortant

1. Start-up and adjustment procedures should be
performed by a qualified service agency.
2. To check most of the Possible Remedies in the
troubleshooting guide listed in Table 42.1, refer to the
applicable sections of the manual.
3. Installation in the airplane hangers must be in
accordance with the Standard for Aircraft Hangars,
ANSI/NFPA 409, and (2) public garage in accordance
with the Standard from Parking Structures, ANSI/NFPA
88A, or the Standard for Repair Garages, ANSI/NFPA
88B and with CAN/CGA B149 Installation Codes.
4. Adequate building relief must be provided so as to
not over-pressurize the building when the heating
system is operating at its rated capacity. This can
be accomplished by taking into account, through
standard engineering methods, the building structure
design infiltration rate; by providing proper sized relief
openings; by interlocking a power exhaust system; or
by a combination of these methods.
5. The heater inlet shall be located in accordance with the
applicable code provisions for ventilation air.
6. Field constructed intake accessories should be properly
designed to minimize the entry of snow and rain.
7. For model MDB (100% Make Up Air) units, all air to
the unit must be ducted directly from the outdoors.
Recirculation of room air is not permitted over the
burner. For model MRB (Return Air) units, recirculation
of room air is permitted if it does not pass over the
burner. Return air ductwork must be ducted to the
return air opening only, while all air passing over the
burner must be ducted directly from the outdoors.
8. If in doubt regarding the application, contact your local
Modine Manufacturing sales representative.
7-500.10