65ºF

START: Measure outdoor ambient temperature

and

ABOVE

USEDO NOTWEIGHCHARGE-IN M THODUNIT

Weigh(Results-in orofremovechargingrefrigerantat low

ABOVE or

BELOW

bas d upon line length

temperatures not reliable)

64ºF and

 

 

BELOW

APPROACH TXV

If refrigerant is added or removed, retest to confirm that unit is properly charged.

1.Connect gauge set as illustrated in figure 18.

2.Confirm proper airflow across coil using figure 20.

3.Compare unit pressures with table 4, Normal Operating Pressures.

4.Set thermostat to call for heat (must have a cooling load between 70-80ºF (21−26ºC).

5.When heat demand is satisfied, set thermostat to call for cooling.

6.Allow temperatures and pressures to stabilize.

7.Record outdoor ambient temperature: AMBº =_________

8.Record liquid line temperature: LIQº = __________

9.Subtract to determine approach (APPº): LIQº_____ − AMBº _____ = APPº_____

10.Compare results with table below.

If value is greater than shown (high approach), add refrigerant; if less than shown (liquid temperature too close to ambient temperature, low approach), remove refrigerant.

APPº (Approach) Values(F:+/−1.0° [C: +/−0.6°])

ºF (ºC)*

−018

−024

−030

−036

−041

−042

−047

−048

−060

65 (18)

4 (2.2)

2 (1.1)

2 (1.1)

2 (1.1)

3 (1.7)

6 (3.3)

9 (5.0)

7 (3.9)

8 (4.4)

75 (24)

5 (2.8)

4 (2.2)

4 (2.2)

5 (2.8)

3 (1.7)

6 (3.3)

9 (5.0)

8 (4.4)

9 (5.0)

85 (29)

6 (3.3)

4 (2.2

6 (3.3)

8 (4.4)

4 (2.2)

8 (4.4)

8 (4.4)

8 (4.4)

9 (5.0)

95 (35)

5 (2,8)

4 (2.2)

5 (2.8)

7 (3.9)

4 (2.2)

8 (4.4)

8 (4.4)

8 (4.4)

9 (5.0)

105 (41)

3 (1.7)

4 (2.2

5 (2.8)

6 (3.3)

4 (2.2)

8 (4.4)

8 (4.4)

8 (4.4)

9 (5.0)

115 (45)

3 (1.7)

3 (1.7)

4 (2.2)

6 (3.3)

5 (2.8)

8 (4.4)

8 (4.4)

9 (5.0)

9 (5.0)

*Temperature of air entering outdoor coil

Figure 22. Using HFC−410A Approach (TXV) Charge Method

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

Connect gauge set as illustrated in figure 18.

 

START: Measure outdoor ambient temperature

65ºF

 

 

 

 

 

 

 

 

 

 

2.

Confirm proper airflow across coil using figure 20.

 

and

 

 

 

 

 

 

 

 

 

 

3.

Compare unit pressures with table 4, Normal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ABOVE

 

 

Operating Pressures.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.

Set thermostat to call for heat (must have a cooling

 

USE WEIGH-IN METHOD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

load between 70-80ºF (21−26ºC)

 

 

 

 

 

DO NOT CHARGE UNIT

 

 

 

ABOVE or

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Weigh-in or remove refrigerant

 

 

 

 

 

 

 

 

 

 

 

 

 

5.

Measure outdoor ambient temperature

 

 

 

 

 

(Results of charging at low

 

 

 

BELOW

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

based upon line length

 

 

 

 

 

 

 

 

 

 

 

 

 

6.

When heat demand is satisfied, set thermostat to call

 

 

temperatures not reliable)

64ºF and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

for cooling

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BELOW

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7.

Allow temperatures and pressures to stabilize.

 

SUBCOOLING TXV

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTE − If necessary, block outdoor coil to maintain

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

325 − 375 psig.

 

 

 

 

 

 

BLOCK OUTDOOR COIL: [sometimes necessary with lower

 

 

 

 

 

 

 

 

 

 

8.

Record liquid line temperature:

 

 

 

 

 

temperatures] Use cardboard or plastic sheet to restrict the airflow

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LIQº = ______

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

through the outdoor coil to achieve pressures from 325−375 psig

 

 

 

 

 

 

 

 

 

 

 

 

 

9.

Measure liquid line pressure and use the value to

 

(2240−2585 kPa). Higher pressures are needed to check charge. Block

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

determine saturation temperature (see table 3):

 

equal sections of air intake panels and move coverings sideways until

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the liquid pressure is in the above noted ranges.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SATº = ______

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CARDBOARD OR

 

 

 

 

 

 

 

 

 

 

10.

Subtract to determine subcooling (SCº):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SATº_____ − LIQº _____ = SCº _____

 

 

 

 

 

 

 

 

 

 

 

PLASTIC SHEETS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

If refrigerant is

 

If value is

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11.

Compare results with table below.

 

 

 

 

 

added or removed,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MORE than

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

verify charge using

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

shown, remove

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the Approach

 

 

 

 

 

 

 

 

 

 

 

SCº (Subcooling) Values (F:+/−1.0° [C: +/−0.6°])

 

 

 

 

 

 

refrigerant.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Method.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ºF (ºC)*

−018

−024

 

 

−030

−036

−041

−042

−047

−048

−060

 

 

 

 

 

 

 

 

 

65 (18)

10 (5.6)

10 (5.6)

 

11 (6.1)

13 (7.2)

9 (5.0)

10 (5.6)

6 (3.3)

8 (4.4)

8 (4.4)

 

 

 

 

 

 

 

 

75 (24)

6 (3.3)

7 (3.9)

 

 

8 (4.4)

 

9 (5.0)

7 (3.9)

7 (3.9)

6 (3.3)

8 (4.4)

7 (3.9)

 

 

 

 

If value is LESS

 

MORE or

 

 

85 (29)

6 (3.3)

8 (4.4)

 

 

6 (3.3)

 

7 (3.9)

7 (3.9)

8 (4.4)

6 (3.3)

8 (4.4)

8 (4.4)

 

 

 

 

than shown, add

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LESS

 

 

95 (35)

6 (3.3)

9 (5.0)

 

 

6 (3.3)

 

8 (4.4)

7 (3.9)

8 (4.4)

6 (3.3)

8 (4.4)

7 (3.9)

 

 

 

 

refrigerant.

 

 

 

 

 

 

 

 

 

 

 

 

 

105 (41)

10 (5.6)

9 (5.0)

 

 

7 (3.9)

 

9 (5.0)

7 (3.9)

8 (4.4)

6 (3.3)

8 (4.4)

6 (3.3)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

115 (45)

10 (5.6)

10 (5.6)

 

8 (4.4)

 

10 (5.6)

6 (3.3)

7 (3.9)

5 (2.8)

7 (3.9)

6 (3.3)

 

 

 

 

 

 

 

 

 

*Temperature of air entering outdoor coil

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 23. Using HFC−410A Subcooling (TXV) Charge Method

Page 26

506636−01

Page 25 Page 27
Page 26
Image 26
Lenox XC14, Elite Series installation instructions Above, Below
Page 25 Page 27

Elite Series, XC14 specifications

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The blade is also designed with heat dissipation in mind. Specially engineered cooling vents help in maintaining optimal temperature during operation. This technology reduces the risk of overheating, which can compromise the integrity of the blade and the quality of the cut.

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