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Allied 4SCU14LE Series, Installation And Maintenance Instructions Manual

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Allied 4SCU14LE Series Installation And Maintenance Instructions Manual Download Page 15

# 48563L006

Page 15

Normal Operating Pressures

Table 8

l

i

o

C

r

o

o

d

t

u

O

r

i

A

g

n

i

r

e

t

n

E

e

r

u

t

a

r

e

p

m

e

T

l

e

d

o

M

8

1

-

4

2

-

0

3

-

6

3

-

2

4

-

8

4

-

0

6

-

L

S

L

S

L

S

L

S

L

S

L

S

L

S

)

V

X

T

(

e

v

l

a

V

n

o

i

s

n

a

p

x

E

F

°

5

6

2

2

2

0

4

1

3

3

2

8

3

1

0

3

2

6

3

1

0

4

2

7

3

1

6

3

2

8

3

1

8

3

2

6

3

1

9

3

2

3

3

1

F

°

5

7

9

5

2

3

4

1

1

7

2

0

4

1

5

6

2

9

3

1

8

7

2

9

3

1

3

7

2

1

4

1

7

7

2

9

3

1

8

7

2

6

3

1

F

°

5

8

1

0

3

5

4

1

3

1

3

3

4

1

8

0

3

1

4

1

1

2

3

0

4

1

8

1

3

3

4

1

0

2

3

9

3

1

3

2

3

8

3

1

F

°

5

9

6

4

3

6

4

1

1

6

3

5

4

1

5

5

3

4

4

1

8

6

3

2

4

1

6

6

3

6

4

1

9

6

3

1

4

1

0

7

3

0

4

1

F

°

5

0

1

6

9

3

8

4

1

2

1

4

7

4

1

5

0

4

6

4

1

9

1

4

4

4

1

7

1

4

8

4

1

2

2

4

4

4

1

5

1

4

3

4

1

F

°

5

1

1

1

5

4

1

5

1

8

6

4

9

4

1

1

6

4

8

4

1

7

7

4

6

4

1

5

7

4

1

5

1

1

8

4

8

4

1

6

7

4

7

4

1

L = Liquid  S = Suction

Values provided above are typical pressures. Indoor unit matchup, indoor air quality, and indoor load will cause
pressures to vary.

Summary of Contents for 4SCU14LE Series

Page 1: ...al shock Disconnect all remote power supplies before installing or servicing any portion of the system Failure to disconnect power supplies can result in property damage personal injury or death WARNING The equipment covered in this manual is to be installed by trained and experienced service and installation technicians Improper installation modification service or use can cause electrical shock ...

Page 2: ...nstalling unit at grade level install on level slab high enough so that water from higher ground will not collect around unit see Figure 2 Roof Mounting Install unit at a minimum of 4 above surface of the roof Care must be taken to ensure weight of unit is properly distributed over roof joists and rafters Either redwood or steel supports are recommended Electrical Wiring All field wiring must be d...

Page 3: ...between indoor unit and thermostat except when required by the indoor thermostat Refer to thermostat installation instructions C common connection between indoor unit and outdoor unit required for proper operation Power Indoor Unit Thermostat Outdoor Unit Y1 Outdoor Unit Heat Cooling Indoor Blower R W1 Y G C R W Y G C C Outdoor Unit Unit must be grounded in accordance with national and local codes...

Page 4: ... t f 5 2 t f 0 5 t f 5 7 t f 0 0 1 0 0 0 8 1 8 3 8 3 8 3 8 3 8 3 0 0 0 4 2 8 3 8 3 8 3 8 3 8 3 0 0 0 0 3 8 3 8 3 8 3 8 3 2 1 0 0 0 6 3 8 3 8 3 8 3 8 3 2 1 0 0 0 2 4 8 3 8 3 8 3 2 1 2 1 0 0 0 8 4 8 3 8 3 8 3 2 1 2 1 0 0 0 0 6 8 3 8 3 8 3 2 1 2 1 Installing Refrigerant Line During the installation of an air conditioning system it is important to properly isolate the refrigerant line to prevent unnec...

Page 5: ... line Floor Joist or Roof Rafter Metal Sleeve Floor Joist or Roof Rafter Tape or Wire Tie Wire Tie around vapor line only Refrigerant Line Sets Installing Horizontal Runs Figure 6 Refrigerant Line Sets Transition from Vertical to Horizontal Anchored Heavy Nylon Wire Tie Wall Stud Metal Sleeve Vapor Line Wrapped in Armaflex Liquid Line Wall Stud Automotive Muffler Type Hanger Strap Liquid Line to V...

Page 6: ... the refrigerant piping This will help to prevent oxidation and the introduction of moisture into the system 4 Use silver alloy brazing rods 5 or 6 silver alloy for copper to copper brazing or 45 silver alloy for copper to brass or copper to steel brazing which are rated for use with R410A refrigerant 5 Remove the Schrader core assemblies before brazing to protect them from damage due to extreme h...

Page 7: ...s completely void of refrigerant Disconnect the liquid and suction lines from the existing outdoor unit If the existing outdoor unit is equipped with manual shutoff valves AND new R22 refrigerant will be used to flush the system Start the existing R22 refrigerant system in cooling mode and close the liquid line valve Pump all the existing R22 refrigerant back into the outdoor unit Flushing Existin...

Page 8: ...covery machine to vapor recovery so that all of the R 22 vapor is recovered Allow the recovery machine to pull a vacuum on the system NOTE A single system flush should remove all of the mineral oil from the existing refrigerant lines and indoor coil A second flushing may be done using clean refrigerant if insufficient amounts of mineral oil were removed during the first flush After each system flu...

Page 9: ... used with systems charged with R410A refrigerant must be capable of handling the higher system operating pressures The gauges should be rated for use with pressures 0 800 on the high side and a low side of 30 vacuum to 250 psi with dampened speed to 500 psi Gauge hoses must be rated for use at up to 800 psi of pressure with a 4000 psi burst rating Liquid and Suction Line Service Valves The liquid...

Page 10: ... oz of refrigerant or 3 lbs pressure Close the valve on the R410A cylinder and the valve on the high pressure side of the manifold gauge set Discon nect the R410A cylinder 4 Connect a cylinder of nitrogen with a pressure regulat ing valve to the center port of the manifold gauge set When using high pressure gas such as nitrogen for this purpose be sure to use a regulator that can control the press...

Page 11: ... relatively large leak If this occurs the leak testing procedure must be repeated 6 When 500 microns or lower is maintained close the manifold gauge valves turn off the vacuum pump and disconnect the manifold gauge center port hose from the vacuum pump Attach the manifold gauge center port hose to a nitrogen cylinder with pressure regulator set to 150 psig and purge the hose Open the manifold gaug...

Page 12: ...he range listed on the unit nameplate If not do not start equipment until the power company has been consulted and the voltage condition corrected 6 Set thermostat for cooling demand turn on power to indoor blower and close the outdoor unit disconnect switch to start the unit 7 Recheck unit voltage with unit running Power must be within range shown on unit nameplate Refrigerant Charging This syste...

Page 13: ...d line pressure reading 4 Subtract the liquid line temperature from the satura tion temperature according to the chart to determine subcooling R410A Temperature Pressure Chart Table 5 p m e T F e r u s s e r P g i s P 2 3 8 0 0 1 3 3 9 2 0 1 4 3 0 5 0 1 5 3 1 7 0 1 6 3 2 9 0 1 7 3 4 1 1 1 8 3 6 3 1 1 9 3 8 5 1 1 0 4 0 8 1 1 1 4 3 0 2 1 2 4 6 2 2 1 3 4 0 5 2 1 4 4 3 7 2 1 5 4 7 9 2 1 6 4 2 2 3 1 7 ...

Page 14: ...e 5 Compare the subcooling value with those shown in Table 6 If subcooling is greater than shown recover some refrigerant If subcooling is less than shown add some refrigerant _____ Saturation Temperature F _____ Liquid Line Temperature F _____ Subcooling Value F r o o d t u O p m e T F F 1 g n i l o o c b u S d i u q i L 8 1 4 2 0 3 6 3 2 4 8 4 0 6 5 6 0 1 0 1 0 1 1 1 0 1 8 8 5 7 6 8 8 1 1 7 8 7 ...

Page 15: ...7 2 9 3 1 3 7 2 1 4 1 7 7 2 9 3 1 8 7 2 6 3 1 F 5 8 1 0 3 5 4 1 3 1 3 3 4 1 8 0 3 1 4 1 1 2 3 0 4 1 8 1 3 3 4 1 0 2 3 9 3 1 3 2 3 8 3 1 F 5 9 6 4 3 6 4 1 1 6 3 5 4 1 5 5 3 4 4 1 8 6 3 2 4 1 6 6 3 6 4 1 9 6 3 1 4 1 0 7 3 0 4 1 F 5 0 1 6 9 3 8 4 1 2 1 4 7 4 1 5 0 4 6 4 1 9 1 4 4 4 1 7 1 4 8 4 1 2 2 4 4 4 1 5 1 4 3 4 1 F 5 1 1 1 5 4 1 5 1 8 6 4 9 4 1 1 6 4 8 4 1 7 7 4 6 4 1 5 7 4 1 5 1 1 8 4 8 4 1 6 ...

Page 16: ...for correct voltage at unit with unit operating 6 Check amp draw outdoor fan motor Unit nameplate _________ Actual _________ NOTE If owner complains of insufficient cooling the unit should be gauged and refrigerant charge checked Refer to the Refrigerant Charging section on page 12 Indoor Coil 1 Clean coil if necessary 2 Check connecting lines and coils for evidence of oil leaks 3 Check condensate...

Page 17: ...hnician ________________________________________ Nameplate Voltage ______________ Rated Load Ampacity ________ Compressor _______________ Outdoor Fan ___________________ Maximum Fuse or Circuit Breaker________________________ Electrical Connections Tight Indoor Filter Clean Supply Voltage Unit Off ________________ Indoor Blower RPM _____________ S P Drop Over Indoor Dry ____________ Outdoor Coil E...

Page 18: ...AL AND LOCAL CODES OUTDOOR FAN F C H 1 2 3 R S C C 2 3 1 EQUIPMENT GROUND HR1 L2 208 230 60 1 L1 K1 1 BLACK YELLOW RED RED C12 BLACK ORANGE B4 PURPLE K1 S4 S24 A4 C Y1 TO 24 VAC POWER SOURCE 20 VA MINIMUM NEC CLASS 2 S4 HIGH PRESSURE SWITCH IF USED S24 LOSS OF CHARGE SWITCH IF USED B1 GROUND LUG GROUND L2 L1 208 230 60 1 C Y1 TO 24 VAC POWER SOURCE 20 VA MINIMUM NEC CLASS 2 A4 TIMED OFF CONTROL IF...

Page 19: ...ply to you Only Warranty This written Limited Warranty is the only warranty made by the warrantor this warranty is in lieu of and excludes all other warranties express or implied The warrantor does not authorize any person to provide any other warranty or to assume for it any further obligation in connection with the warranted product These Warranties Apply Only To products in their original insta...

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