Manifold Pressure Meter; Functions Of The Manifold Pressure Meter - Chery QQ Service Manual

and vacuum. The vacuum range is 0-5X10
from 0 and range is over 4.2X10
meter scale starts from 0 and range is over 21.1X10
These two meters are fitted on the same seat, each end of which has a manual valve
and under which there are three path joint.
Joint of low-pressure meter, that connnects to low pressure pipe connector through a
hose.
1- Lowe-pressure meter(blue) 2-high-pressure meter(red) 3- hose at high pressure
side (red) 4- hose for maintainance (yellow) 5- hose at low pressure side (blue)
Joint for high-pressure meter connects to the high pressure pipe with a hose. The
middle joint connects to the vaccum pump or refrigerant tank with a hose. Two
manual valves combined with three hoses make the manifold pressure meter have four
functions(as shown in below diagram)
positions of the high and low pressure valves
high and low pressure valves off
Low pressure valve on, high pressure valve off
Low pressure valve off, high pressure valve on
high and low pressure valves on
high and low pressure valves are on, which means that the two meters are connect ed to
Note:
refrigeration system and middle pipe respecdtively; high and low pressure valves are off, which
means that the two meters are disconnected to the middle pipe but connected to refrigeration
system.
Chery QQ Service Manual
5
pa(0-760mmHg), the pressure scale starts
5
pa(approximate 4.2kgf/cm

Manifold pressure meter

Functions of the manifold pressure meter

Check leakage of the refrigeration system and
134
Chery Automobile Co.,Ltd
2
). The high-pressure
5
pa(approximate 21.1kgf/cm
70141
functions
Fault diagonosis for the refrigeration system
Filling refrigerant or refrigerant oil
in refrigeration system
charge liquid quickly
Evacuate the refrigeration system
2
).