Refrigerant Charge - Daikin RCS Series Installation And Maintenance Manual

Refrigerant Charge

Leak Testing
Pressurize line set and coil through service fittings with dry
nitrogen to 150 psig maximum. Leak test all joints using liquid
detergent. If a leak is found, recover pressure and repair.
WARNING
Do not use oxygen to purge lines or pressure system for leak test. Oxygen
reacts violently with oil, which can cause an explosion resulting in severe
personal injury or death.
Table 12: Basic System Charge*
Unit
06G
07G
10G
12F
15F
20F
NOTE: *System with 0 Feet of Tubing
Table 13: Required Ounces of R410A Charge per Foot of
Tubing
Tube Size O.D., in [mm] Liquid Tube, oz [g]
1/2 [12 .7]
5/8 [15 .88]
3/4 [19 .05]
7/8 [22 .23]
1-1/8 [28 .58]
1-3/8 [34 .93]
1-5/8 [41 .28]
2-1/8 [53 .98]
NOTE: Quantities based on 110°F liquid and 45°F vapor
IM 962-4 • AIR-COOLED SPLIT SYSTEM CONDENSERS
Charge oz [g]
219 [6,209]
400 [11,340]
437 [12,389]
378 [10,716]
506 [14,345]
655 [18,569]
Vapor, oz [g]
1 .06 [30 .0] 0 .04 [1 .13]
1 .65 [46 .7] 0 .07 [1 .98]
2 .46 [69 .7] 0 .10 [2 .83]
3 .28 [92 .9] 0 .13 [3 .68]
— 0 .22 [6 .23]
— 0 .34 [9 .63]
— 0 .48 [13 .60]
— 0 .84 [23 .81]
Tools Required for Installing and
Servicing R410A Models
Manifold Sets:
• Up to 800 PSIG High side
• Up to 250 PSIG Low Side
• 550 PSIG Low Side Retard
Manifold Hoses:
• Service Pressure Rating of 800 PSIG
Recovery Cylinders:
• 400 PSIG Pressure Rating
• Dept. of Transportation 4BA400 or BW400
R410A systems operate at higher pressures than R22 systems. Do not use
R22 service equipment or components on R410A equipment
Specification of R410A
Application: R410A is not a drop-in replacement for R22;
equipment designs must accommodate its higher pressures. It
cannot be retrofitted into R22 condensing units.
Physical Properties: R410A has an atmospheric boiling point
of 62.9°F and its saturation pressure at 77°F is 224.5 psig.
Composition: R410A is an azeotropic mixture of 50%
by weight difluoromethane (HFC32) and 50% by weight
pentafluoroethane (HFC125).
Pressure: The pressure of R410A is approximately 60% (1.6
times) greater than R22. Recovery and recycle equipment,
pumps, hoses and the like need to have design pressure
ratings appropriate for R410A. 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 BW400.
Combustibility: At pressures above 1 atmosphere, mixture
of R410A and air can become combustible. R410A and air
should never be mixed in tanks or supply lines, or be allowed
to accumulate in storage tanks. Leak checking should never
be done with a mixture of R410A and air. Leak checking can
be performed safely with nitrogen or a mixture of FR410A and
nitrogen.
16
Installation
CAUTION
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