Ruud SON Series, Installation, Operation And Service Manual

08

Manifold Sets:

-Up to 800 PSIG High Side

-Up to 250 PSIG Low Side

Manifold Hoses:

-Service Pressure Ratiing of 800 PSIG

Recovery Cylinders:

-400 PSIG Pressure Rating

3.3.1 SPECIFICATION OF R-410A:

Application: R-410A is not a drop-in replacement for R-22 ;

equipment designs

must accommodate its higher pressures. It cannot be 

retrofi

tted into R-22 condens-

ing units.

Physical  Properties:

R-410A  has  an  atmospheric  boiling  point  of  -62.9°F  and  its

saturaton pressure at 77°F is 224.5 psig.

Composition:

R-410A is an azeotropic mixture of 50% by weight 

difluoro

methane

(HFC-32) and 50% by weight pentafluoroethane (HFC-125).

Pressure:  The  pressure  of  R-410A  is  approximately  60%  (1.6  times)  greater

than  R-22.

Recovery  and  recycle  equipment,  pumps,  hoses  and  the  like  need  to

have design pressure ratings appropriate for R-410A. 

Manifold sets need to range

up to 800 psig high-side and 250 psig low-side with a 550 psig low-side retard.

Hoses need to have a service pressure rating of 800 psig. Recovery cylinders need

to have a 400 psig service pressure rating.

DOT 4BA400 or DOT BW400.

Combustibility:

At pressures above 1 atmosphere, mixture of R-410A and air can

become combustible. 

R-410A and air should never be mixed in tanks or supp

ly

!

CAUTION

R-410A  systems  operate  at  higher  pressures  than  R-22  systems.  Do  not  use 

R-22 service equipment or components on R-410A equipment.

lines,  or  be  allowed  to  accumulate  in  storage  tanks .  Leak  checking  should

never  be  done  with  a  mixture  of  R-410A  and  air.

Leak  checking  can  be  per-

formed safely with nitrogen or a mixture of R-410A and nitrogen.

3.3.2 QUICK REFERENCE GUIDE FOR R-410A

•

R-410A  refrigerant  operates  at  approximately  60%  higher  pressure  (1.6  times)

than R-22. Ensure that servicing equipment is designed to operate with R-410A.

•

R-410A refrigerant cylinders are pink in color.

•

R-410A, as with other HFC’s is only compatible with POE oils.

•

Vacuum pumps will not remove moisture from oil.

•

R-410A systems are to be charged with liquid refrigerants. Prior to March 1999,

R-410A  refrigerant  cylinders  had  a  dip  tube.  These  cylinders  should  be  kept

upright for equipment charging. Post March 1999 cylinders do not have a dip tube

and should be inverted to ensure liquid charging of the equipment.

• Do not install a suction line filter drier in the liquid

 line.

•

A liquid line 

filter

 drier is standard on every unit. Only manufacturer approved liq-

uid  line 

filter

  driers  can  be  used.  These  are  Sporlan  (CW083S)  and  Alco

(80K083S) driers. These 

filter

 driers are rated for minimum working pressure of

600 psig.

•

Desiccant (drying agent) must be compatible for POE oils and R-410A.

3.3. Information on R410a & Tools