DC50 Series Dual-Cool Climate Control
Tube and DC70 Vest Instruction Sheet
Air Pressure
Breathing air pressure must be continually monitored at the point-of-
attachment while operating the respirator. A reliable air pressure gauge
must be present to monitor the pressure during respirator operation.
Make certain that your breathing air compressor has sufficient
capacity to deliver a minimum of 30 cfm per respirator wearer at
all times. Because Dual-Cool has two cool tubes, it requires a higher
than normal volume of air.
The Breathing Air Pressure Table in your respirator user manual defines
the air pressure ranges necessary to provide the respirator with a volume
of air that falls within the required range of 6-15 cubic feet per minute (cfm)
or 170-425 liters per minute (lpm). (See 42 CFR, Part 84, Subpart J, 84.150)
WARnIng
Failure to supply the minimum required pressure at the point-of-attachment
for your hose length and type will reduce airflow and could result in death
or serious injury.
Air Supply Hose
To maintain your Bullard respirator’s NIOSH approval, use only approved
Bullard V10 Series hose(s) in lengths of 50 to 300 feet, or Bullard V5 Series
hose in lengths of 25 to 50 feet. Bullard V11 hose-to-hose adapters MUST be
used to connect V10 hose lengths together. Secure connection(s) until wrench
tight and leak free.
WARnIng
WARnIng
The DC50 Dual-Cool climate control system is not recommended for cooling
the air supply when the air temperature is less than 70° F. Because the DC50
Dual-Cool may cool the incoming air by more than 30° F, it is possible for
ice to form in the breathing tube and reduce the airflow. Failure to observe
these warnings could result in death or serious injury.
Compressed air must be dry enough to prevent ice buildup in the cold airstream.
Ice could reduce airflow into the respirator hood.
Ordering Information
CATAlOg
nuMBeR DeSCRIPTIOn
DC5040
1
⁄
4
” Industrial Interchange (Hansen compatible) quick-
disconnect nipple, adjustable temperature control, CH60
connector hose, heat shield and belt
DC70Ml
Medium/Large Cooling Vest
DC70XlXXl
X-Large/XX-Large Cooling Vest
DC705X
5X-Large Cooling Vest
CH60
Connector Hose
4612
Nylon Belt
HSDC
Heat Shield
Use of any other air supply hose voids NIOSH approval of the entire
respirator assembly and could reduce the airflow to the respirator,
possibly resulting in death or serious injury to the respirator wearer.
Failure to observe these warnings could result in death or serious
injury.
www.bullard.com
