Page 3
XP15 SERIES
USING MANIFOLD GAUGE SETS
HFC−410A refrigerant manifold gauge sets must be
capable of handling higher system operating pressures.
The gauge set shall be rated for use with pressures of 0 −
800 psig on the high side, and a low side of 30 inches of
vacuum (Hg) to 250 psig, which retards when opened to
500 psig. Gauge hoses must be rated for use up to 800 psig
of pressure with a 4000 psig burst rating.
OPERATING SERVICE VALVES
IMPORTANT
Only use Allen wrenches of sufficient hardness
(50Rc − Rockwell Harness Scale minimum). Fully
insert the wrench into the valve stem recess.
Service valve stems are factory−torqued (from 9
ft−lbs for small valves, to 25 ft−lbs for large valves) to
prevent refrigerant loss during shipping and
handling. Using an Allen wrench rated at less than
50Rc risks rounding or breaking off the wrench, or
stripping the valve stem recess.
The liquid and vapor lines service valves with gauge ports
as illustrated in figures 2 and 3 are used for removing
refrigerant, flushing, leak testing, evacuating, checking
charge and charging.
Each valve is equipped with a service port which has a
factory−installed valve stem.
1
2
3
4
5
6
7
8
9
10
11 12
1/6 TURN
This illustrates how to use a wrench to tighten caps an additional
1/6 or 1/12 turn clockwise.
1
2
3
4
5
6
7
8
9
10
11 12
1/12 TURN
Figure 1. Cap Tightening Distances
IMPORTANT
To prevent stripping of the various caps used, an
appropriately sized wrench should be used and
fitted snugly over the cap before tightening.
Operating Angle−Type Service Valve
To Access Angle−Type Service Port:
A service port cap protects the service port core from
contamination and serves as the primary leak seal.
1. Remove service port cap using an appropriately sized
wrench.
2. Connect gauge to the service port.
3. When testing is completed, replace service port cap and
tighten as follows:
S
With Torque Wrench
: Finger tighten and then
tighten per table 1 on page 2.
S
Without Torque Wrench
: Finger tighten and with an
appropriately sized wrench to turn an additional
1/6 turn clockwise as illustrated in figure 1.
To Open and Close Angle−Type Service Valve:
A valve stem cap protects the valve stem from
contamination and assures a leak−free seal.
1. Remove stem cap with a wrench.
2. Use a service wrench with a hex−head extension
(3/16" for liquid-line valve sizes and 5/16" for
vapor-line valve sizes) to back the stem out
counterclockwise as far as it will go.
3. Replace the stem cap and tighten as follows:
S
With Torque Wrench
: Tighten finger tight and then
tighten per table 1 on page 2.
S
Without Torque Wrench
: Finger tighten and with an
appropriately sized wrench to turn an additional
1/12 turn clockwise as illustrated in figure 1.
NOTE − A label with specific torque requirements may be
affixed to the stem cap. If the label is present, use the
specified torque listed.
(VALVE STEM SHOWN
CLOSED) INSERT HEX
WRENCH HERE
SERVICE PORT
SERVICE PORT
CORE
TO OUTDOOR
UNIT
STEM CAP
STEM CAP
VALVE STEM
FRONT-SEATED
TO OUTDOOR
UNIT
SERVICE PORT
CORE
(VALVE STEM
SHOWN OPEN)
INSERT HEX
WRENCH HERE
TO INDOOR
UNIT
SERVICE PORT CAP
SERVICE PORT
SERVICE PORT CAP
TO INDOOR
UNIT
VALVE IS FRONT−SEATED
(CLOSED)
VALVE IS BACK−SEATED
(OPENED)
OPEN TO BOTH
INDOOR AND
OUTDOOR UNITS]
CLOSED TO BOTH
INDOOR AND
OUTDOOR UNITS]
VALVE STEM
BACKED-SEATED
Figure 2. Angle −Type Service Valve
