Manifold Gauge Set

Manifold Gauge Set
The manifold gauge set is a most important tool for fault diagnosis and system efficiency assessment. The relationship to each other of HIGH and LOW pressures and their correlation to AMBIENT and EVAPORATOR temperatures must be compared to determine system status (reference pressure/temperature graphs). Because of the heavy reliance upon this piece of equipment for service diagnosis, ensure that the gauges are calibrated regularly and the equipment is treated with care.





The gauge set consists of a manifold fitted with:
1 Low side service hose - BLUE.
2 Low Side hand valve - BLUE.
3 Low pressure compound gauge - BLUE.
4 High pressure gauge - RED.
5 High Side hand valve - RED.
6 High side service hose - RED.
7 System service hose - NEUTRAL COLOR (commonly yellow).

Manifold
The manifold is designed to control refrigerant flow. When connected into the system, pressure is registered on both gauges at all times. During system tests both the high and low side hand valves should be closed (rotate clockwise to seat the valves). The hand valves isolate the low and the high sides from the center (service) hose.

Low Side Pressure Gauge
This compound gauge, is designed to register positive and negative pressure and may be typically calibrated-Full Scale Deflection, 0 to 10 bar (0 to 150 lb/sq in) pressure in a clockwise direction; 0 to 1000 mbar (0 to 30 in Hg) FSD negative pressure in a counter clockwise direction.

High Side Pressure Gauge
This pressure gauge may be typically calibrated from 0 to 30 bar (0 to 500 lb/sq in) FSD in a clockwise direction. Depending on the manufacturer, this gauge may also be of the compound type.