Heat Controller HFC REFRIGERANT R410A - Manual (Page 8)

SAFETY AND HANDLING OVERVIEW
ASHRAE Standard 15 details safety precautions when
handling refrigerants in commercial systems and should
be read and understood. Refrigerants are especially dan-
gerous in confi ned spaces.
• R410a has a much higher pressure (+60%) associated
with its operation. Use caution when handling and ensure
proper tools and equipment.
•
Use an R410a approved recovery device. Recov-
ery cylinders must have a service pressure rating
of 400 psig (DOT 4BA 400 and DOT 4BW 400 are
acceptable). DO NOT USE STANDARD DOT
RECOVERY OR STORAGE CYLINDERS WITH A
300 PSIG RATING WITH R410A! NEVER LET A
CYLINDER GET ABOVE 125°F!
• The color code for R410A cylinders is “Rose” and
R407c is “Chocolate Brown”.
•
A 410a specifi c gauge set is required. These will
allow pressure measurements to 800 psig on the high
side and 250 psig on the low side. Hoses must have a
service rating 800 psig.
•
Do not mix air and R410a. Under pressure the resulting mixture
can be fl ammable.
•
Do not mix R410a and other refrigerants. Gauges,
manifold, and hoses should be evacuated after each
use. Use dedicated equipment for R410a to ensure that no
mixing, accidental or intentional, will occur.
•
Consult the MSDS from refrigerant supplier for details on toxicity,
fl ammability, ingestion limits etc.
•
Exposure is the same as R22 – 40 hour work week.
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