Page 14
14ACX SERIES
(VALVE STEM SHOWN CLOSED)
INSERT HEX WRENCH HERE
SERVICE PORT CORE
SERVICE PORT CAP
ANGLE-TYPE SERVICE VALVE
(FRONT-SEATED CLOSED)
STEM CAP
(VALVE STEM SHOWN OPEN)
INSERT HEX WRENCH HERE
ANGLE-TYPE SERVICE VALVE
(BACK-SEATED OPENED)
1 - Remove stem cap with an appropriately sized wrench.
2 - Use a service wrench with a hex-head extension (3/16” for liquid
line valve sizes and 5/16” for suction line valve sizes) to back the
stem out counterclockwise as far as it will go.
When service valve is
CLOSED
, the service port is
open to the line set and indoor unit.
When service valve is
OPEN
, the service port is
open to line set, indoor and outdoor unit.
NOTE
- A label with specific torque requirements may be affixed to the
stem cap. If the label is present, use the specified torque.
OPERATING ANGLE-TYPE SERVICE VALVE:
FIGURE 16
1
2
3
4
5
6
7
8
9
10
11
12
1/12 TURN
A service port cap protects the service port core from contamination
and serves as the primary leak seal.
1 - Remove service port cap with an appropriately sized wrench.
2 - Connect gauge set to service port.
3 - When testing is completed, replace service port cap and tighten as
follows:
●
With torque wrench: Finger tighten and
torque cap per table 3.
●
Without torque wrench: Finger tighten and
use an appropriately sized wrench to turn
an additional 1/6 turn clockwise.
1
2
3
4
5
6
7
8
9
10
11
12
1/6 TURN
Reinstall Stem Cap:
Stem cap protects the valve stem from damage and serves as the
primary seal. Replace the stem cap and tighten as follows:
●
With Torque Wrench: Finger tighten
and then torque cap per table 3.
●
Without Torque Wrench: Finger
tighten and use an appropriately
sized wrench to turn an addition
al 1/12 turn clockwise.
TO ACCESS SERVICE PORT:
FIGURE 17
Checking and Adding System Charge
The 14ACX unit is factory-charged with enough HFC-410A
refrigerant to accommodate a 15-foot length of refrigerant
piping. Charge should be checked and adjusted using the
tables provided on the charging procedure sticker located
on the unit access panel. Detailed information is provided
in the 14ACX Installation and Service Procedures manual
(Corp0638-L10), which is available on DaveNet.
Homeowner Information
CAUTION
Before attempting to perform any service or mainte
nance, turn the electrical power to unit OFF at dis
connect switch.
In order to ensure peak performance, your system must be
properly maintained. Clogged filters and blocked airflow
prevent your unit from operating at its most efficient level.
Homeowner Maintenance
The following maintenance may be performed by the
homeowner.
●
Contact a licensed professional HVAC technician to
schedule a yearly inspection and maintenance
appointment for your equipment.
●
Check the indoor unit filter each month and replace the
filter, if necessary.
Have your Lennox dealer show you where your indoor
unit filter is located. It will be either at the indoor unit
(installed internal or external to the cabinet) or behind a
return air grille in the wall or ceiling. Check the filter
monthly and clean or replace it as needed.
Disposable filters should be replaced with a filter of the
same type and size.
●
Check the indoor unit drain line for obstructions monthly
during the cooling season.
The indoor evaporator coil is equipped with a drain pan
to collect condensate formed as your system removes
humidity from the inside air. Have your dealer show you
the location of the drain line and how to check for
obstructions. (This would also apply to an auxiliary drain,
if installed.)
●
Check the area around the outdoor unit monthly and
remove any obstructions that may restrict airflow to the
outdoor unit. This would include grass clippings, leaves,
or papers that may have settled around the unit.
●
Trim shrubbery away from the unit and periodically check
for debris which collects around the unit.
●
During the winter months, keep the snow level below the
louvered panels.
NOTE
-
The filter and all access panels must be in place
any time the unit is in operation. If you are unsure about the
filter required for your system, call your Lennox dealer for
assistance.
