WARNING
Improper installation, adjustment, alteration, service or maintenance can cause personal injury, loss of life, or damage to property.
Installation and service must be performed by a licensed professional installer (or equivalent) or a service agency.
CAUTION
Physical contact with metal edges and corners while applying excessive force or rapid motion can result in personal injury. Be aware of, and use caution when working near these areas during installation or while servicing this equipment.
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of refrigerant (CFCs, HCFCs AND HFCs) as of July 1, 1992. Approved methods of recovery, recycling or reclaiming must be followed. Fines and/or incarceration may be levied for noncompliance.
WARNING
Electric Shock Hazard. Can cause injury or death. Unit must be grounded in accordance with national and local codes.
Line voltage is present at all components when unit is not in operation on units with
IMPORTANT
This model is designed for use in check expansion valve systems only. An indoor expansion valve approved for use with HFC−410A refrigerant must be ordered separately, and installed prior to operating the system.
Shipping and Packing List
Check unit for shipping damage. Consult last carrier immediately if damage is found.
1 door unit.
1
1 age wiring)
2 Isolation grommets for liquid and suction lines
Using Manifold Gauge Set
When checking the system charge, only use a manifold gauge set that features low−loss anti−blow back fittings.
IMPORTANT
To prevent stripping of the various caps used, the appropriately sized wrench should be used and fitted snugly over the cap before tightening.
Manifold gauge set used with HFC−410A refrigerant systems must be capable of handling higher system operating pressures. The gauges should be rated for use with pressures of 0 − 800 psig on the high side and a low side of 30" vacuum to 250 psig with dampened speed to 500 psi. Gauge hoses must be rated for use at or up to 800 psig of pressure with a 4000 psig burst rating.
Table 1. Torque Requirements
Parts | Recommended Torque | |
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|
|
Service valve cap | 8 ft.− lb. | 11 NM |
|
|
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Sheet metal screws | 16 in.− lb. | 2 NM |
|
|
|
Machine screws #10 | 28 in.− lb. | 3 NM |
|
|
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Compressor bolts | 90 in.− lb. | 10 NM |
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|
|
Gauge port seal cap | 8 ft.− lb. | 11 NM |
|
|
|
Operating Service Valves
The liquid and vapor line service valves are used for removing refrigerant, flushing, leak testing, evacuating, verifying charge and charging.
Each valve is equipped with a service port which has a factory−installed valve stem. Figure 2 provides information on how to access and operating both angle and ball 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.
See the Lennox Service and Application Notes #C−08−1 for further details and information.
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