Design Technical Manual

Table Of Contents
Unit : in. (mm)
Caution
Gauge connections are ½-20UNF (5/16”) male are (with valve core).
Provide R410A hose or refrigerant tubing with ½-20UNF (5/16”) female are that is rated for and
can withstand 725psi(5Mpa). Be sure method of connection and support does not place stress on
gauge or location of piping connection.
Purge air and leak test after installation.
PRESSURE GAUGES (RECOMMENDED)
PRESSURE GAUGE MOUNTING PLATE
PRESSURE GAUGE PIPE CONNECTION POSITIONS
Connect each pressure gauge with the pipe at the connection position shown in the gure.
Caution
Use a pressure gauge having an outside diameter (including the
mounting part) of ø3-7/8 (98) or less and a gauge diameter of ø2-
15/16 (75) or less
Measuring ranges of the pressure gauges:
High-pressure side: 0 to 725 psi (0 to 5 MPa)
Low-pressure side: 0 to 507 psi (0 to 3.5 MPa)
However, it is recommended that both pressure gauges should
be designed for a measuring range 0 to 725 psi (0 to 5 MPa).
Caution
Use a pressure gauge mounting plate of the above outside dimensions.
The mounting plate must be thick enough to endure the weights of the pressure gauges.
Make mounting screw holes in accordance with each pressure gauge.
Each pressure gauge must be installed at the center position shown above
Ø2-15/16
(75)
Ø3-7/16
(88)
Ø3-7/8
(98)
Center positions
Pipe connection position
(Piping for the high-pressure side)
Pipe connection position
(Piping for the low-pressure side)
- (03 - 40) -
OUTDOOR
UNITS
OUTDOOR
UNITS