Amana ASH13018 Service Manual Page 56
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SERVICING
56
LOW SIDE
GAUGE
A
ND VALVE
HIGH SIDE
GAUGE
AND VALVE
TO
UNIT SERVICE
VALVE PORTS
VACUUM PUMP
VACUUM PUMP
ADAPTER
800 PSI
RATED
HOSES
CHARGING
CYLINDER
AND SCALE
{
R-22
MANIFOLD
EVACUATION
3. If the vacuum pump is working properly, close the valve to
the vacuum thermocouple gauge and open the high and
low side valves to the high vacuum manifold set. With the
valve on the charging cylinder closed, open the manifold
valve to the cylinder.
4. Evacuate the system to at least 29 inches gauge before
opening valve to thermocouple vacuum gauge.
5. Continue to evacuate to a maximum of 250 microns.
Close valve to vacuum pump and watch rate of rise. If
vacuum does not rise above 1500 microns in three to five
minutes, system can be considered properly evacuated.
6. If thermocouple vacuum gauge continues to rise and
levels off at about 5000 microns, moisture and non-
condensables are still present. If gauge continues to rise
a leak is present. Repair and re-evacuate.
7. Close valve to thermocouple vacuum gauge and vacuum
pump. Shut off pump and prepare to charge.
S-103 CHARGING
WARNING
REFRIGERANT UNDER PRESSURE!
* Do not overcharge system with refrigerant.
* Do not operate unit in a vacuum or at negative
pressure.
Failure to follow proper procedures may cause
property damage, personal injury or death.
CAUTION
Use refrigerant certified to AHRI standards. Used
refrigerant may cause compressor damage and will
void the warranty. Most portable machines cannot
clean used refrigerant to meet AHRI standards.
CAUTION
Operating the compressor with the suction valve
closed will void the warranty and cause serious
compressor damage.
Charge the system with the exact amount of refrigerant.
Refer to the specification section or check the unit name-
plates for the correct refrigerant charge.
An inaccurately charged system will cause future prob-
lems.
1. When using an ambient compensated calibrated charg-
ing cylinder, allow liquid refrigerant only to enter the high
side.
2. After the system will take all it will take, close the valve
on the high side of the charging manifold.
3. Start the system and charge the balance of the refriger-
ant through the low side. DO NOT charge in a liquid
form.
4. With the system still running, close the valve on the charg-
ing cylinder. At this time, you may still have some liquid
refrigerant in the charging cylinder hose and will definitely
have liquid in the liquid hose. Reseat the liquid line core.
Slowly open the high side manifold valve and transfer the
liquid refrigerant from the liquid line hose and charging
cylinder hose into the suction service valve port. CARE-
FUL: Watch so that liquid refrigerant does not enter the
compressor.
5. With the system still running, reseat the suction valve
core, remove hose and reinstall both valve core caps.
6. Check system for leaks.
NOTE: This charging procedure can only be done in the
cooling mode of operation. (Early production "a" models
only.) All models with compressor process tube access
valve can be processed in heating cycle if this valve is
used.
When charging a remote condensing unit with a non-match-
ing evaporator coil, or a system where the charge quantity is
unknown, alternate charging methods must be used. These
systems must be charged according to subcooling or super-
heat.
- Service Instructions 1
- IMPORTANT INFORMATION 2
- TABLE OF CONTENTS 2
- Split System Heat Pumps R-22 8
- PRODUCT IDENTIFICATION 10
- C PKF 036 2 A 15
- C KL 036 2 A 16
- CAPF1824A6A 19
- *Installed on indoor coil 20
- EXPANSION VALVE KITS 23
- ACCESSORIES 24
- PRODUCT DESIGN 26
- SYSTEM OPERATION 28
- TROUBLESHOOTING CHART 34
- SERVICING 35
- VOLT/OHM 38
- S-109 CHECKING SUBCOOLING 60
- ACCESSORIES WIRING DIAGRAMS 66
- EQUIPMENT GROUND 74
- USE COPPER WIRE 74
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