General Information - Lennox Elite Series XP13 Units Installation Instructions Manual

WARNING
This product and/or the indoor unit it is matched
with may contain fiberglass wool.
Disturbing the insulation
maintenance, or repair will expose you to fiberglass
wool dust. Breathing this may cause lung cancer.
(Fiberglass wool is known to the State of California
to cause cancer.)
Fiberglass wool may also cause respiratory, skin,
and eye irritation.
To reduce exposure to this substance or for further
information, consult material safety data sheets
available from address shown below, or contact
your supervisor.
Lennox Industries Inc.
P.O. Box 799900
Dallas, TX 75379−9900

General Information

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.− lb.
Sheet metal screws 16 in.− lb.
Machine screws #10 28 in.− lb.
Compressor bolts 90 in.− lb.
Gauge port seal cap 8 ft.− lb.
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.
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.
during installation,
11 NM
2 NM
3 NM
10 NM
11 NM
Page 3
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.
1/6 TURN
11 12
1
2
10
9 3
4
8
5
7
6
Figure 1. Cap Tightening Distances
IMPORTANT
To prevent stripping of the various caps used, the
appropriately sized wrench should be used and
fitted snugly over the cap before tightening.
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
D
tighten per table 1.
Without Torque Wrench: Finger tighten and use an
D
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 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
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:
With Torque Wrench: Tighten finger tight and then
D
tighten per table 1.
D Without Torque Wrench: Finger tighten and use an
appropriately sized wrenched to turn an additional
1/12 turn clockwise as illustrated in figure 1.
1/12 TURN
11 12
1
2
10
9 3
4
8
5
7
6
XP13 SERIES