Lennox EL16XC1 Series, Инструкция по установке и обслуживанию

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EL16XC1 SERIES
WHEN TO CHARGE?
Warm weather best
Can charge in colder weather
CHARGE METHOD? Determine by:
Metering device type
Outdoor ambient temperature
REQUIREMENTS:
Sufficient heat load in structure
Indoor temperature between 70‐80ºF
(21-26ºC)
Manifold gauge set connected to unit
Thermometers:
-
to measure outdoor ambient temperature
- to measure liquid line temperature
- to measure suction line temperature
TXV
FIXED
ORIFICE
APPROACH OR
SUBCOOLING
WEIGH‐IN
SUPERHEAT
65ºF
(18.3ºC) and
Above
START: Determine how refrigerant is metered
39ºF
(3.8ºC) and
Below
Which indoor
metering
device?
WEIGH‐IN
64ºF
(17.7ºC) and
Below
40ºF
(4.4ºC) and
Above
DETERMINING CHARGE METHOD
A B
C
D
E
Figure 16. Determining Charge Method
WEIGH IN
Liquid Line
Set Diameter
Ounces per 5 feet (g per 1.5 m)
adjust from 15 feet (4.6 m) line set*
3/8” (9.5 mm)
3 ounce 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.
Refrigerant Charge per Line Set Length
NOTE — The above nameplate is for illustration purposes only. Go to actual nameplate on outdoor unit for
charge information.
CHARGING METHOD
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.
CALCULATING SYSTEM CHARGE FOR OUTDOOR UNIT VOID OF CHARGE
If the system is void of refrigerant, first, locate and repair any leaks and then weigh in the refrigerant charge into the
unit. To calculate the total refrigerant charge:
Amount specified on
nameplate
Adjust amount. for variation
in line set length listed on
line set length table below.
Total charge
+
=
64ºF (17.7ºC) and Below
A
E
Figure 17. Using HFC-410A Weigh In Method