Gasboy Atlas Fuel Systems Installation Manual - Manual (Page 18)

Hazardous Locations Important Considerations for DEF Dispensers
Page 3-2 MDE-4331M Atlas® Fuel Systems Installation Manual · September 2014
Important Considerations for DEF Dispensers
Applicable during installation and operation of the dispenser: DEF freezes at
approximately 11 °F (-11.5 °C). Power to the dispenser and heater must always remain
ON in cold weather. If power is lost and the temperature drops below this point, the
system must be inspected for freeze damage before restart. For sites that experience
occasional power losses or for sites that are located in very cold climates, it is
recommended that a backup power generator be used to maintain constant power to the
dispenser. Do not use any additives to lower the freezing point of DEF. Additives of any
type must not be used in DEF.
Prolonged storage at temperatures above 77 °F (25 °C) can impair the quality of DEF
and reduce its shelf life.
CAUTION
DEF is mildly corrosive. It can corrode components that are made from incompatible
material(s) and reduce their integrity. The use of incompatible material(s) may lead to
leaks and spills, and can contaminate and degrade the DEF. When dispensing DEF,
verify with the manufacturer if the material of all plumbing components are compatible
with the DEF being dispensed.
CAUTION
Do not use prover cans meant for engine fuel with DEF or vice versa. Use stainless steel
prover cans for DEF. DEF and engine fuel must not be mixed with each other or be
contaminated by each other. Otherwise, damage to a vehicle’s engine or pollution control
devices can occur. DEF crystallizes as its water base evaporates. Pouring out liquid will
not guarantee that no corrosive DEF remains in the prover can. DEF must not be
contaminated with diesel fuel, contaminants, or other fluids or materials. Such
contamination can cause serious damage to vehicle catalytic converters.
CAUTION
• Conventional fluid handling precautions are also applicable to DEF.
• Avoid contact with eyes, skin, and clothing. Ensure that eyewash stations and safety
showers are close to the work location.
• DEF is mildly corrosive and non-flammable.
• Clean the DEF spill with water and dry the area with clean rags, especially areas that
contain metallic parts. Spilt DEF can be slippery and will corrode certain types of metallic
parts. Wear eye protection and rubber gloves during any cleanup activity.
• DEF is heavier than gasoline. Be aware that prover cans, containers filled with DEF, and
so on, will be considerably heavier than gasoline.