Panasonic R410A Specifications, Charging Additional Refrigerant, Finishing the Job, position, Fig

3. Charging Additional Refrigerant

Charging additional refrigerant (calculated from the liquid tube length as shown in Section "1-12. Installation Instructions, 1. Tubing Size, Table 1-2 Tubing Data for Models", Amount of additional refrigerant charge) using the liquid tube service valve. (Fig. 1-126)

Use a balance to measure the refrigerant accurately. If the additional refrigerant charge amount cannot be charged at once, charge the remaining refrigerant in liquid form by using the gas tube service valve with the system in Cooling mode at the time of test run. (Fig. 1-127)

*If an additional refrigerant charge has been performed, list the refrigerant tubing length and amount of additional refrigerant charge on the product label (inside the panel).

4.Finishing the Job

1. Specifications

	Manifold valve
Pressure	Lo	Hi
gauge

Valve

Liquid

R410A

(1)With a hex wrench, turn the liquid tube service

1valve stem counter-clockwise to fully open the valve.

(2)Turn the gas tube service valve stem counter-clockwise to fully open the valve.

To avoid gas from leaking CAUTION when removing the charge hose, make sure the stem of the gas tube is turned all the way out (“BACK SEAT”)

position.

Close

Gas tube

Close

Liquid tube

Close

Outdoor unit

(3)	Loosen the charge hose connected to the gas
	tube service port (5/16".) slightly to release the
	pressure, then remove the hose.
(4)	Replace the 5/16". fl are nut and its bonnet on the
	gas tube service port and fasten the fl are nut
	securely with an adjustable wrench or box wrench.
	This process is very important to prevent gas from
	leaking from the system.

Fig. 1-126

(5) Replace the valve caps at both gas and liquid

service valves and fasten them securely.

Open

Gas tube

Open

Liquid tube

Open

Outdoor unit

Fig. 1-127

1-124