Connecting The Refrigerant Piping; Using The Stop Valve And Service Port; To Connect The Refrigerant Piping To The Outdoor Unit - Daikin RXYSCQ5TMV1B Installation And Operation Manual

5.3

Connecting the refrigerant piping

DANGER: RISK OF BURNING
5.3.1

Using the stop valve and service port

To handle the stop valve
Take the following guidelines into account:
▪ Make sure to keep all stop valves open during operation.
▪ The gas and liquid stop valves are factory closed.
▪ Do NOT apply excessive force to the stop valve. Doing so may
break the valve body.
To open the stop valve
1 Remove the stop valve cover.
2 Insert a hexagon wrench into the stop valve and turn the stop
valve counterclockwise.
3 When the stop valve cannot be turned any further, stop turning.
4 Install the stop valve cover.
Result: The valve is now open.
To close the stop valve
1 Remove the stop valve cover.
2 Insert a hexagon wrench into the stop valve and turn the stop
valve clockwise.
3 When the stop valve cannot be turned any further, stop turning.
4 Install the stop valve cover.
Result: The valve is now closed.
To handle the stop valve cover
▪ The stop valve cover is sealed where indicated by the arrow. Do
NOT damage it.
RXYSCQ4~6TMV1B
VRV IV-S system air conditioner
4P555881-1 – 2019.07
▪ After handling the stop valve, tighten the stop valve cover
securely, and check for refrigerant leaks. For the tightening
torque, refer to the table below.
To handle the service port
▪ Always use a charge hose equipped with a valve depressor pin,
since the service port is a Schrader type valve.
▪ After handling the service port, make sure to tighten the service
port cover securely. For the tightening torque, refer to the table
below.
▪ Check for refrigerant leaks after tightening the service port cover.
Tightening torques
Stop valve Tightening torque N•m (turn clockwise to close)
size (mm)
Valve body Hexagonal
wrench
Ø9.5 5.4~6.6
Ø15.9 13.5~16.5
5.3.2 To connect the refrigerant piping to the
outdoor unit
NOTICE
Be sure that the field installed piping does not touch other
pipes, the bottom panel or side panel. Especially for the
bottom and side connection, be sure to protect the piping
with suitable insulation, to prevent it from coming into
contact with the casing.
1 Do the following:
▪ Remove the service cover. See
unit" on page 8.
▪ Remove the piping intake plate (a) with screw (b).
a
b
2 Choose a piping route (a, b or c).
a c
b
INFORMATION
a
b b
▪ Remove the knockout hole (a) in the bottom plate or
cover plate by tapping on the attachment points with a
flat head screwdriver and a hammer.
▪ Optionally, cut out the slits (b) with a metal saw.
5 Installation
Shaft
Cap (valve Service
lid) port
4 mm 13.5~16.5 11.5~13.9
6 mm 22.5~27.5
"5.1.1 To open the outdoor
b a b
Installation and operation manual
9