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508296-G01 / 31-5000753

Page 21 of 24

Issue 2231

Checking Refrigerant Charge

The NS23AMA unit is factory-charged with enough HFC-

410A refrigerant to accommodate a 15-foot length of 

refrigerant piping. For refrigerant piping greater than 15 

feet, calculate the additional charge using Table 9. Then 

add the additional charge specified for the specific indoor 

coil match-up listed on the unit charging sticker. 

When charging the system with refrigerant or checking 

refrigerant, the “Charge Mode” (CHRG MODE) jumper 

provides the ability operate the unit at 100% capacity. See 

Charge Mode Jumper section on Page 18 for details.

Charge should be checked and adjusted using the 

tables provided on the charging procedure sticker on the 

unit access panel. Detailed information is given in the 

NS23AMA Service Manual. 

Liquid Line Dia.

Ounces per 5 feet (G per 1.5 m)  

Adjust from 15 feet (4.6 M) Line Set*

3/8" (9.5 mm)

3 ounces per 5' (85 G per 1.5 m)

*If line length is greater than 15 ft. (4.6 m), add this amount. If 

line length is less than 15 ft. (4.6 m), subtract this amount. 
NOTE – Insulate liquid line when it is routed through areas 

where the surrounding ambient temperature could become 

higher than the temperature of the liquid line or when 

pressure drop is equal to or greater than 20 psig. 

Table 9. Refrigerant Charge per Line Set Length

High Pressure Switch

This unit is equipped with a high pressure switch which 

is located on the liquid line. The SPST, normally closed 

pressure switch opens when liquid line pressure rises above 

the factory setting of 590 +/- 15 psig and automatically 

resets at 418 +/- 15 psig.

Homeowner Information

ELECTRICAL SHOCK HAZARD!

Turn OFF electric power to unit before performing any 

maintenance or removing panels or doors.

FAILURE TO DO SO COULD RESULT IN BODILY 

INJURY OR DEATH.

 WARNING

In order to ensure peak performance, your system must 

be properly maintained. Clogged filters and blocked airflow 

prevent your unit from operating at its most efficient level. 

The system should be inspected and serviced before each 

cooling season by a licensed professional HVAC service 

technician (or equivalent).

Homeowner Maintenance 

The following maintenance may be performed by the 

homeowner. 
•   Contact a licensed professional HVAC technician to 

schedule inspection and maintenance appointments 

for your equipment before each cooling season. 

• 

 Check  the  indoor  unit  filter  each  month  and  replace 

the filter, if necessary. 

•   Have your technician show you where your indoor 

unit filter is located. It will be either at the indoor unit 

(installed internal or external to the cabinet) or behind 

a return air grille in the wall or ceiling. Check the filter 

monthly and clean or replace it as needed. Disposable 

filters should be replaced with a filter of the same type 

and size. 

•   

Check the indoor unit drain line for obstructions 

monthly. The indoor coil is equipped with a drain pan 

to collect condensate formed as your system removes 

humidity from the inside air. Have your dealer show 

you the location of the drain line and how to check 

for obstructions. (This would also apply to an auxiliary 

drain, if installed.) 

•   Check the area around the outdoor unit monthly and 

remove  any  obstructions  that  may  restrict  airflow  to 

the outdoor unit. This would include grass clippings, 

leaves, or papers that may have settled around the 

unit. 

•   Trim shrubbery away from the unit and periodically 

check for debris which collects around the unit. 

•   During the winter months, keep the snow level below 

the louvered panels. 

NOTE: 

The filter and all access panels must be in place 

any time the unit is in operation. If you are unsure about 

the filter required for your system, call your technician for 

assistance.

Sprinklers and soaker hoses should not be installed 

where they could cause prolonged exposure to the 

outdoor unit by treated water. Prolonged exposure of the 

unit to treated water (i.e., sprinkler systems, soakers, 

waste water, etc.) will corrode the surface of the steel 

and aluminum parts, diminish performance  and affect 

longevity of the unit.

 IMPORTANT

Thermostat Operation 

See the thermostat homeowner manual for instructions on 

how to operate your thermostat. 

Summary of Contents for GE NS23AMA

Page 1: ...ry When installing the unit use care to avoid sharp edges WARNING The Clean Air Act of 1990 bans the intentional venting of refrigerant CFCs HCFCs and HFCs as of July 1 1992 Approved methods of recove...

Page 2: ...te unit away from windows patios decks etc where unit operation sounds may disturb customer Leave some slack between structure and unit to absorb vibration Place a sound absorbing material such as Iso...

Page 3: ...CAUTION Elevate unit per local climate and code requirements to provide clearance above estimated snowfall level and ensure adequate drainage of unit Use snow stand in areas where prolonged freezing t...

Page 4: ...Piping Guidelines DO NOT LOCATE THE UNIT On brick concrete blocks or unstable surfaces Near clothes dryer exhaust vents Near sleeping area or near windows Under eaves where water snow or ice can fall...

Page 5: ...ssure in system is raised above 40 psig DO NOT REPLACE COMPRESSOR IMPORTANT The NS23AMA is a variable capacity cooling system utilizing variable speed compressor technology With the variable speed com...

Page 6: ...0 7 8 5 8 36 3 4 48 7 8 60 Table 4 Line Set Guidelines 51 to 150 Linear Feet in Length Tonnage Line SIze Total Linear Length ft 25 50 75 100 125 150 24 5 16 25 50 55 48 40 33 Max Elevation ft 3 8 25 5...

Page 7: ...NUT Figure 5 Remove Expansion Valve Uncased Coil Shown 1 On fully cased coils remove the coil access and plumbing panels 2 Remove any shipping clamps from the liquid line and distributor assembly 3 Di...

Page 8: ...ulator that can control the pressure down to 1 or 2 psig 6 9 to 13 8 kPa WARNING Refrigerant must be reclaimed in accordance with national and local codes WARNING 1 Set the recovery machine for liquid...

Page 9: ...ulb insulation is required if mounted external to the coil casing sensing bulb installation for bulb positioning STUB END TEFLON RING LIQUID LINE ASSEMBLY WITH BRASS NUT DISTRIBUTOR ASSEMBLY 3 Install...

Page 10: ...main round Do not crimp end of the line Remove service cap and core from both the vapor and liquid line service ports 1 2 LIQUID LINE SERVICE VALVE SERVICE PORT CORE SERVICE PORT CAP SERVICE PORT CORE...

Page 11: ...E VALVES POINT FLAME AWAY FROM SERVICE VALVE PREPARATION FOR NEXT STEP 7 WRAP SERVICE VALVES To help protect service valve seals during brazing wrap water saturated cloths around service valve bodies...

Page 12: ...side of the manifold gauge set in order to pressurize the line set and the indoor unit E After a few minutes open one of the service valve ports and verify that the refrigerant added to the system ea...

Page 13: ...r liquid refrigerant Open the manifold gauge valve 1 to 2 psig in order to release the vacuum in the line set and indoor unit G Perform the following Close manifold gauge valves Shut off HFC 410A cyli...

Page 14: ...oor unit Note that the published performance data is based upon the use of a two stage thermostat Refer to the NS23AMA field wiring diagram for a conventional 24VAC single stage thermostat NS23AMA Low...

Page 15: ...the floor It should not be installed on an outside wall or where it can be affected by sunlight or drafts THERMOSTAT 5 FEET 1 5M Figure 8 NOTE 24VAC Class II circuit connections are made in the contr...

Page 16: ...tion Type Less than 100 30m 18 Temperature Rating 35 C Minimum More than 100 30m 16 Table 7 Conventional 24VAC Thermostat Wiring Route High Voltage and Ground Wires Any excess high voltage field wirin...

Page 17: ...G DS W2 Y2 Y2 O D SENSOR OPTIONAL R2 FOR SINGLE STAGE OPERATION INSTALL A JUMPER BETWEEN Y1 TO Y2 ON THE OUTDOOR UNIT TERMINAL STRIP Figure 10 Conventional 24VAC Cooling Thermostat Wiring Single Stage...

Page 18: ...cooling blower demand must also be provided to initiate blower operation on the cooling speed on the indoor unit The compressor and outdoor fan motor will operate at 100 capacity To exit the charging...

Page 19: ...l will begin to ramp up the compressor capacity until maximum capacity is achieved The NS23AMA unit will cycle off once the thermostat demand is satisfied Start Up If unit is equipped with a crankcase...

Page 20: ...P ANGLE TYPE SERVICE VALVE FRONT SEATED CLOSED STEM CAP VALVE STEM SHOWN OPEN INSERT HEX WRENCH HERE ANGLE TYPE SERVICE VALVE BACK SEATED OPENED 1 Remove stem cap with an appropriately sized wrench 2...

Page 21: ...vel The system should be inspected and serviced before each cooling season by a licensed professional HVAC service technician or equivalent Homeowner Maintenance The following maintenance may be perfo...

Page 22: ...ill check the refrigerant charge per the charging sticker information on the outdoor unit 2 Verify that system total static pressure and airflow settings are within specific operating parameters 3 Ver...

Page 23: ...ENT PROTECTION SIZE REFER TO COMPRESSOR IN UNIT FOR ACTUAL TERMINAL ARRANGEMENT COMPRESSOR CONTACTOR RED L2 2 K1 1 RT13 WARNING ELECTRIC SHOCK HAZARD CAN CAUSE INJURY OR DEATH UNIT MUST BE GROUNDED IN...

Page 24: ..._____________ Actual Amps ______ Rated Volts _______ Actual Volts ________ Condenser Fan Full Load Amps _________ Actual Amps ______ Cooling Mode Suction Pressure ____________________ Liquid Pressure...

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