Lennox 10ACE Series, Руководство по установке

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Page 5
10ACE SERIES
If you install a expansion valve with an indoor coil that
includes a fixed orifice, remove the orifice before the
expansion valve is installed.
IMPORTANT
Failure to remove the fixed orifice when installing an
expansion valve on the indoor coil will result in im-
proper operation and damage to the system.
Manifold Gauge Set
When checking the unit charge, use a manifold gauge set
that is equipped with low loss" hoses. Do not use a man-
ifold gauge set with anything other than a low loss" hose.
Service Valves
The service valves (liquid line − figure 6, vapor line − figures
7 and 8) and gauge ports are used for leak testing, eva-
cuating, charging and checking charge. Each valve is
equipped with a service port which has a factory−installed
Schrader valve. A service port cap protects the Schrader
valve from contamination and serves as the primary leak
seal.
To Access Schrader Port:
1. Remove service port cap with an adjustable wrench.
2. Connect gauge to the service port.
3. When testing is complete, replace service port cap.
Tighten finger tight, then torque per table 1 (Page 2) .
To Open Front-Seated Service Valves:
1. Remove stem cap with an adjustable wrench.
2. Use a service wrench with a hex−head extension
(3/16" for liquid-line valve sizes; 5/16" for vapor-line
valve sizes) to back the stem out counterclockwise as
far as it will go.
3. Replace the stem cap. Tighten finger tight, then torque
per table 1 (Page 2) .
To Close Front-Seated Service Valves:
1. Remove the stem cap with an adjustable wrench.
2. Use a service wrench with a hex−head extension
(3/16" for liquid-line valve sizes; 5/16" for vapor-line
valve sizes) to turn the stem clockwise to seat the
valve. Tighten it firmly.
3. Replace the stem cap. Tighten finger tight, then torque
per table 1 (Page 2) .
Vapor Line Ball Valve
Ball-type service valve (10ACE−060 only, figure 8) func-
tions the same way as the other valves but cannot be re-
built; if one fails, replace with a new valve. The ball valve is
equipped with a service port with a factory−installed
Schrader valve. A service port cap protects the Schrader
valve from contamination and assures a leak−free seal.
Front-Seated Liquid Line Service Valve
Figure 6
INSERT HEX
WRENCH HERE
SERVICE
PORT CAP
STEM
CAP
(VALVE FRONT-SEATED)
TO
OUT-
DOOR
COIL
SCHRADER
VALVE [OPEN TO
LINE SET WHEN
VALVE IS CLOSED
(FRONT SEATED)]
TO
INDOOR
COIL
Valve in closed position Valve in open position
Front-Seated Vapor Line Service Valve
Figure 7
Valve in closed position
INSERT
HEX
WRENCH
HERE
SERVICE PORT
SERVICE
PORT CAP
STEM CAP
(VALVE
FRONT-SEATED)
TO
OUTDOOR
COIL
SCHRADER VALVE
[OPEN TO LINE SET
WHEN VALVE IS
CLOSED (FRONT
SEATED)]
TO
INDOOR
COIL
Valve in open position
SERVICE PORT
BALL (SHOWN
CLOSED)
STEM
CAP
SCHRADER VALVE
SERVICE
PORT CAP
TO
INDOOR
COIL
TO
OUTDOOR
COIL
STEM
USE ADJUSTABLE WRENCH
TO OPEN: ROTATE STEM
COUNTER-CLOCKWISE 90°.
TO CLOSE: ROTATE STEM
CLOCKWISE 90°.
Ball−Type Vapor Valve (Valve Closed)
Figure 8