APC IN ROW RD ACRD101 Specifications download pdf (Page 33)

25InRow Air Cooled RD Installation

Adding a holding charge

R-410A is a mixed refrigerant. When charging this equipment with mixed refrigerant, only liquid

refrigerant must be charged.

Caution: Failure to charge with liquid refrigerant only may damage the system.

Note: The equipment must be charged only with R-410A. It is the responsibility of the

installing contractor to provide sufficient refrigerant for a complete system charge during start-

up.

Note: It is very important to make a note of the amount of R-410A used in this pre-charge.

Note: It is recommended that the isolation valve assembly accessory (ACAC10022) be

installed to facilitate moving the equipment after installation.

1. If installed, open the two shutoff valves above or below the equipment. Do not close the valves

unless there is a need to remove the incoming piping.

2. Pressurize the system to 17.2 bar (250 psi) with nitrogen. Leave the system pressurized for 24

hours (recommended), and then check the gauges for a drop in pressure.

3. Use a deep vacuum pump and pull the first vacuum down to 750 microns. Wait for an hour

(vacuum should not rise above 1500 microns) and then break the vacuum with nitrogen.

4. Pull a final vacuum down to 300 microns for a minimum of 2 hours.

Caution: Install a ball valve before the micron gauge to prevent damage to the

micron gauge during charging.

5. Using the charging table, calculate the total charge needed, then charge to 80% of that total. See

“Charging Table” on page 26.

6. Record the amount of refrigerant used so the charge can be completed later.

7. Charge with liquid R-410A until the system pressure equalizes with the refrigerant canister.

a. Apply the charge into the liquid line service port inside the equipment.

b. Purge the refrigerant hoses and manifold set.

Adding compressor oil

Depending upon piping run lengths, the system may require an additional charge of oil at start-up. The

installing contractor shall provide adequate compressor (POE) oil.

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APC IN ROW RD ACRD101 Specifications Page 33