Gasboy Atlas Start-up - Manual (Page 15)

MDE-4334D Atlas™ Start-up and Service Manual · July 2013 Page 1-7
DEF Special Considerations Read This First
Troubleshooting DEF Freeze
DEF freezes at approximately 11.3 °F (-11.5 °C). If it freezes in hydraulic components, it may
permanently damage the meters, valves, breakaways and possibly other devices. It is
extremely important that DEF fluid in the dispenser does not fall below that temperature.
CAUTION
WARNING
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 back up 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.
If the unit experiences a freeze, it will be required to thaw all components and repair the
damage that may have occurred. Units can be thawed using directed exhaust from a vehicle (if
no electronic boards are in the area being thawed). Although DEF is non-flammable, diesel
fuel is flammable. Therefore, other close proximity heating devices that are non-explosion
proof cannot be used. However, before using electrical heating devices with heat extension
ducting, ensure that such devices or their power cords are not in hazardous vicinity near diesel,
gasoline, other fueling equipment, or hazardous vapors or liquids. To determine any hazard
zone involved, consult the installation or service manuals for other equipment. As other
damage either missed or not detected may exist, very closely monitor the equipment looking
for leaks when the lines are pressurized. Wear eye protection.
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. Else, damage to a vehicle’s engine or pollution control devices could 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.
• 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.