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GE Appliances
Technical Service Guide
Copyright © 2010
All rights reserved. This service guide may not be reproduced in whole or in part
in any form without written permission from the General Electric Company.
SYSTEM PRESSURES
Technicians with R-22 experience will need to become familiar working
with high and low side pressures that are much higher when using
R-410A. A typical R-22 system operates normally with a high side
pressure of approximately 260 psi at a 120°F condensing temperature
and a low side pressure of approximately 76 psi at 45°F evaporator
saturation temperature.
A normally operating R-410A system with the same condensing
temperature of 120°F and 45°F evaporator saturation temperature
will have a high side pressure of approximately 525 psi and a low side
pressure of approximately 250 psi.
IMPORTANT SAFETY NOTICE
The information in this service guide is intended for use by
individuals possessing an adequate background of air
conditioning experience. Any attempt to repair an air
conditioning system may result in personal injury and property
damage. The man u fac tur er or seller cannot be responsible for the
in ter pre ta tion of this in for ma tion, nor can it assume any liability in
connection with its use.
WARNING
To avoid personal injury, disconnect power before servicing air
conditioning systems. If electrical power is required for diagnosis or test
purposes, disconnect the power immediately after performing the
necessary checks.
RECONNECT ALL GROUNDING DEVICES
If grounding wires, screws, straps, clips, nuts, or washers used to
complete a path to ground are removed for service, they must be
returned to their original position and properly fastened.
