2.2 REFRIGERATION SYSTEM DATA

 

 

Model

RSH105

 

 

 

 

 

 

Weight (Dry)

46.5 kg (103 lb)

a. Compressor/Motor

Approved Oil

Mobil ST32

 

 

Oil Charge

2957 ml (100 ounces)

 

Assembly

 

 

 

The oil level range, with the compressor off,

 

 

Oil Sight Glass

should be between the bottom and one-eighth

 

 

 

level of the sight glass.

b. Evaporator Expansion

Verify at -18 _C

 

(0 _F) container box

4.4 to 6.7 _C (8 to 12 _F)

 

Valve Superheat

 

temperature

 

 

 

 

 

 

 

c. Economizer Expansion

 

4.4 to 11.1 _C (8 to 20 _F)

 

Valve Superheat

 

 

 

 

d. Heater Termination Thermostat

Opens

54 (¦ 3) _C = 130 (¦ 5) _F

 

 

Closes

38 (¦ 4) _C = 100 (¦ 7) _F

e. High Pressure Switch

Cutout

25 (¦ 1.0) kg/cm@ = 350 (¦ 10) psig

 

 

Cut-In

18 (¦ 0.7) kg/cm@ = 250 (¦ 10) psig

 

 

 

 

 

 

 

 

Unit Configuration

Charge Requirements - R-134a

 

 

 

 

 

 

Water-Cooled

4-Row Coil

 

 

 

f.

Refrigerant Charge

5.33 kg

Condenser

(11.75 lbs)

 

 

 

 

 

 

 

 

 

Receiver

4.99kg

 

 

(11.0 lbs)

 

 

 

g. Fusible Plug

Melting point

99 _C = (210 _F)

 

 

Torque

6.2 to 6.9 mkg (45 to 50 ft-lbs)

 

 

 

 

 

h. Sight Glass/Moisture Indicator

Torque

8.9 to 9.7 mkg (65 to 70 ft-lbs)

 

 

 

 

i.

Rupture Disc

Bursts at

35 ¦ 5% kg/cm@ = (500 ¦ 5% psig)

 

 

Torque

6.2 to 6.9 mkg (45 to 50 ft-lbs)

 

 

 

 

 

 

j.

Unit Weight

Refer to unit model number plate.

 

 

 

 

k. Water Pressure Switch

Cut-In

0.5 ¦ 0.2 kg/cm@ (7 ¦ 3 psig)

 

 

Cutout

1.6 ¦ 0.4 kg/cm@ (22 ¦ 5 psig)

 

 

 

 

 

 

T-309

2-6

Page 20
Image 20
Carrier 69NT20-531-300 manual Model RSH105 Weight Dry 46.5 kg 103 lb, Approved Oil Mobil ST32 Oil Charge 2957 ml 100 ounces

69NT20-531-300 specifications

The Carrier 69NT20-531-300 is a cutting-edge rooftop unit designed to meet the demanding requirements of commercial heating and cooling applications. This model embodies Carrier’s commitment to energy efficiency, reliability, and advanced technological features that enhance indoor comfort while minimizing operational costs.

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Overall, the Carrier 69NT20-531-300 stands out as a premier choice for businesses looking for an efficient, reliable, and feature-rich rooftop HVAC unit. Its blend of energy efficiency, advanced technology, and durability positions it as a leader in commercial heating and cooling solutions, making it a valuable investment for any commercial property.