Lennox International Inc (2/4)SA13 warranty Minimum Clearance Requirements, Roof Curb Assembly

Minimum Clearance Requirements

	To	For	For
	Combustible		Proper
		Service
	Material		Operation
Front	0"	48"	3"
Rear	0"	24"	3"
Condenser	0"	24"	3"
End
Blower	0"	30"	0"
End
Top	0"	36"	36"

Table 1

Units may also be moved or lifted with a forklift while still in the factory-supplied packaging. The lengths of the forks of the forklift must be a minimum of 42".

CAUTION

Before lifting a unit, make sure that the weight is distributed equally on the cables so that it will lift evenly.

Roof Curb Installation

Clearances

All units require certain clearances for proper operation and service. Refer to Table 1 for the minimum clearances to combustibles as well as minimum clearances necessary for servicing and proper unit operation.

In the U.S., units may be installed on combustible floors made from wood or class A, B, or C roof covering material. In Canada, units may be installed on combustible floors.

Service Access

Access to all serviceable components is provided by four removable panels: filter compartment, blower compart- ment, heater compartment, and top panel.

Condensate Drain

The SA package unit is equipped with a 3/4" FPT coupling for condensate line connection. Plumbing must conform to local codes. Use a sealing compound on male pipe threads.

The condensate drain line must be properly trapped and routed to a suitable drain. See Figure 3 for proper

drain arrangement.The drain line must pitch to an open drain or pump to prevent clogging of the line. Seal around the drain connection with suitable material to prevent air leakage into the return air system.

Typical Condensate Drain Connection

Unit Drain Connection

1.00" Min.

If a roof curb is used, follow the manufacturer’s Installation Instructions and be sure that all required clearances are observed (see following Clearances section).

12.00"

Max.

3.00" Min.

Roof Curb Assembly

Figure 2

Positive Liquid Seal Required

Figure 3

Ductwork

Ductwork should be designed and sized according to the methods in Manual Q of the Air Conditioning Contractors of America (ACCA).

A closed return duct system shall be used. This shall not preclude use of economizers or outdoor fresh air intake. It is recommended that supply and return duct connections at the unit be made with flexible joints.

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