Greensource SM Split Heat Pump – CS Installation Manual (PDF 1.8 MB)

18 | Maintenance

SM CS Series Heat Pump

2. An annual “checkup” is recommended by a licensed refrigeration mechanic. Recording the performance measurements of volts, amps, and water temperature differences (both heating and cooling) is recommended. This data should be compared to the information on the unit’s data plate and the data taken at the original startup of the equipment.

3. Lubrication of the blower motor is not required, however may be performed on some motors to extend motor life. Use SAE-20 nondetergent electric motor oil.

4. The condensate drain should be checked annually by cleaning and flushing to insure proper drainage.

Figure 12: Refrigerant Charge, Line Sizing and Capacity Multiplier Chart

SYSTEM

MODEL

SM024

SM036

Factory

R410A

Charge

(Oz)*

80

86

Refrigerant Line O.D. Size (Based on Equivalent Line Length)

25 FT.

35 FT.

45 FT.

50 FT.

75 FT

LIQ. SUC. LIQ. SUC. LIQ. SUC. LIQ. SUC. LIQ. SUC.

3/8 3/4 3/8 3/4 3/8 3/4 3/8 3/4 3/8 7/8

Suct. Line

Riser Max.

3/4

3/8 3/4 3/8 3/4 3/8 3/4 3/8 7/8 3/8 7/8 3/4

SM048

SM060

SM070

93

115

127

3/8 7/8 3/8 7/8 3/8 7/8 3/8 7/8 3/8 7/8

3/8 1-1/8 3/8 1-1/8 3/8 1-1/8 3/8 1-1/8 3/8 1-1/8

3/8 1-1/8 3/8 1-1/8 3/8 1-1/8 3/8 1-1/8 3/8 1-1/8

7/8

7/8

7/8

CAPACITY MULTIPLIER 1.00

.995

Example 1:

Model SM036 with 45ft of equivalent length of 3/8” O.D Liquid

Line. Total system charge= Factory charge + (45ft - 25 ft) x .60 oz/ft Total System Charge =86 oz + (20ft x .60 oz/ft) = 98 oz.

Additional 12 oz of R410A refrigerant required.

Note: Charge value shown for paired SM air handler.

Unit

0.990

0.990

Charge adjustments for SM CS when paired with DX AH (oz)

DX025 DX035 DX049 DX061

0.980

Example 2:

Model SM060 with 10ft of equivalent length of 3/8” O.D

Liquid Line. Total system charge= Factory charge - (25ft -

10ft) x .60 oz/ft Total System Charge = 115 oz - (15ft x .60 oz/ ft) = 106 oz. Removal of 9oz of R410A refrigerant required.

DX071

SM024-1CSC

SM036-1CSC

SM048-1CSC

SM060-1CSC

-

-

-2

-

12

0

-

-

-

25

22

-

-

-

-

10

-

-

-

6

SM070-1CSC

0

Example 3:

Model SM036 CS paired with DX049 AH with 45ft of equivalent length of 3/8” O.D Liquid Line. Total system charge = Factory charge + (DX charge adjustments) + (45ft - 25ft) x .60 oz/ft) = 123 oz. Additional 37 oz of R410A refrigerant required.

Figure 13: Liquid Line Charge Per Linear Foot

R410A oz per foot

Liquid Line Size, O.D.

1/4

.25

5/16

.44

3/8

.60

1/2

1.15

5/8

1.95

8 733 920 846 (2015/01) Subject to change without prior notice SM CS Series Heat Pump