Rheem RS120-64BP Instruction Manual download pdf (Page 12)

Basic Mounting Procedures

The solar collector in your solar system can

be mounted in either a vertical or horizontal

orientation on the roof (See Figure 4). Although

the collector is protected from freeze conditions by

the glycol HTF and does not normally need to be

drained, it is still important to slope the collectors

just slightly to allow for complete drainage if

necessary. The recommended slope is 1/4" per foot

of horizontal run.

To ensure proper water drainage from the glazing,

the collectors must maintain a minimum angle from

horizontal of at least 10°. Never mount the collector

directly or parallel to a at roof surface. Use "Solar

Strut" tilt mount kits to rack the collectors to the

proper angle.

The collector should be mounted as close to the

storage tank as possible to minimize heat loss in the

piping runs. If the home has attic access, mounting

the collectors near the roof peak provides for

additional attic workspace.

The solar collector should be mounted on the roof

in accordance with these general principles:

The most important structural consideration is

to securely anchor the solar collector and the

mounting hardware to the structural members

of the roof with stainless steel hanger or lag

bolts. The solar collector must be attached to

the mounting hardware as detailed in Figures

5–10. (Note: The drawings in this manual

detail mounting hardware for the series

collector.)

The collector must be raised from the roof

surface to allow for rainwater and debris

to pass under the collectors and for proper

ventilation of the roong material. There

should be at least 3" of clearance between

the roof surface and the bottom of the solar

collectors.

In selecting mounting hardware and fasteners

it is extremely important to avoid galvanic

corrosion resulting from the direct contact

of incompatible metals. Use of anodized

aluminum mounting hardware and stainless

steel lag or hanger bolts, lock washers and

round washers is recommended. In climates

subject to severe winters or high humidity use

of galvanized fasteners is prohibited.

Preserving the integrity of the roof membrane

is the most important roong consideration.

Ensure that all roof penetrations required

to plumb and mount the solar collector are

properly ashed and sealed in accordance with

standard roong practices.

If the region is subject to hurricane conditions,

additional steps may be required to secure

the collector and mounting hardware to the

structural members. In certain areas of the

country, local building codes may require

collector wind load testing or prescribe specic

mounting procedures. Consult your local

building department.

Figure 4 - Collector Orientation

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 35 36

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Rheem RS120-64BP Instruction Manual Page 12

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