Operating Service Valves - Lennox Elite Series Installation Instructions Manual

WARNING
OPERATING SERVICE VALVES
The liquid and vapor line service valves 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
IMPORTANT
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
who have jurisdiction before installation.
When servicing or repairing HVAC components, ensure
the fasteners are appropriately tightened. Table 1 shows
torque values for fasteners.
Table 1 Torque Requirements
Parts Recommended Torque
Service valve cap 8 ft Ib 11 NM
Sheet metal screws 16 in Ib 2 NM
Machine screws #10 28 in Ib 3 NM
Compressor bolts 90 in Ib 10 NM
Gauge port seal cap 8 ft Ib 11 NM
USING MANIFOLD GAUGE SETS
When checking the system charge only use a manifold
gauge set that features low loss anti-blow back fittings
See figure 2 for a typical manifold gauge connection setup
Manifold gauge sets used with HFC-410A refrigerant
systems must be capable of handling the higher system
operating pressures The gauges should be rated for use
with pressures of 0 - 800 on the high side and a low side of
30" vacuum to 250 psi with dampened speed to 500 psi
Gauge hoses must be rated for use at up to 800 psi of
pressure with a 4000 psi burst rating
I/6 TURN
1/12 TURN
9
8 4
Figure 1 Cap Tightening Distances
IMPORTANT
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 with an appropriately sized
wrench
2 Connect gauge to the service port
3 When testing is completed replace service port cap and
tighten as follows:
• With Torque Wrench: Finger tighten and then
tighten per table 1
• Without Torque Wrench: Finger tighten and use an
appropriately sized wrench to turn an additional
1/6 turn clockwise as illustrated in figure 1
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XP16 SERIES