2.The indoor units must be installed so that the ignition system components are protected from water (dripping, spraying, rain, etc.) during appliance operation and service (circulator replacement, control replacement, etc.).

3.The appliance must be installed on a level, non-combustible floor. Concrete over wood is not considered a non-combustible floor. Maintain required clearances from combustible surfaces.

4.For installation on a combustible floor only when installed on special base: Units installed over a combustible floor must use the Special Combustible Floor Base. The unit must be centered on the base as shown in FIG. 1.

•Provide a base of hollow clay tile or concrete blocks from 8” to 12” thick and extending 24” beyond the sides.

•The blocks must be placed in line so that the holes line up horizontally to provide a clear passage through the blocks.

•This procedure should also be followed if electrical conduit or radiant heat distribution piping runs through the floor and beneath the appliance.

•Ensure that combustible floor base meets local fire code requirements.

5.Outdoor models require the installation of an optional vent cap. Instructions for placement of the vent cap are included in the venting section.

Outdoor models must not be installed directly on the ground. The outdoor unit must be installed on a concrete brick, block or other non-combustible pad.

(TABLE A) – CLEARANCES FROM COMBUSTIBLE CONSTRUCTION

 

CLEARANCES

CW495-2066

 

Right Side

3"

 

 

Rear

3"

 

 

Left Side

3"

 

 

 

(24" for Service)

 

Front

ALCOVE*

 

 

(30" for Service)

 

Top

3"

 

 

Flue

1"**

 

*Alcove is a closet without a door.

**Consult local codes and/or vent material manufacturer.

(FIG. 1) 495-2066 REQUIREMENTS FOR INSTALLATION OVER COMBUSTIBLE FLOOR

SPECIAL LOCATION: OUTDOOR USE

Outdoor models have additional location and clearance requirements. These requirements must be adhered to carefully, since wind, rain, snow and cold cannot be controlled in outdoor applications. See Outdoor Installation, on page 9.

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Lochinvar CW 645, CW 745 manual Special Location Outdoor USE, Table a Clearances from Combustible Construction
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CW 645, CW 745 specifications

The Lochinvar CW 645 and CW 745 are advanced water heater models from Lochinvar, a leading manufacturer of water heating solutions. These high-efficiency units are designed to meet the demands of both commercial and residential applications, combining cutting-edge technology with robust performance.

One of the defining features of the CW series is its commitment to energy efficiency. With their stainless steel construction, these water heaters boast a high thermal efficiency rating. The CW 645 and CW 745 utilize modulating technology, allowing them to adjust the heating output based on real-time demand. This results in reduced energy consumption and lower operational costs, making them an ideal choice for environmentally conscious consumers.

These models are equipped with a powerful burner system designed to provide optimal heating performance. The burners are engineered for reliability and longevity, ensuring consistent hot water supply even under heavy usage. Additionally, the CW 645 and CW 745 feature a compact footprint, making them suitable for installation in tight spaces or areas with limited access.

The advanced control system in these units takes user experience to the next level. With intuitive controls and a digital display, users can easily set temperatures and monitor system performance. The integrated diagnostics feature ensures quick troubleshooting, enhancing reliability and reducing maintenance time.

Safety is another paramount consideration in the design of the CW series. Both models come equipped with multiple safety features, including a flame safeguard system and a high-temperature limit switch. These safety mechanisms provide peace of mind while ensuring compliance with local building codes.

Furthermore, the CW 645 and CW 745 models are versatile in their applicability. They can be used for a variety of applications including restaurants, schools, and hospitals. Their ability to provide consistent hot water makes them particularly valuable in high-demand situations.

In summary, the Lochinvar CW 645 and CW 745 are exceptional water heating solutions that epitomize efficiency, safety, and performance. With advanced features, user-friendly controls, and solid construction, these units are well-suited to meet the hot water needs of both commercial and residential users. Investing in a CW series water heater not only secures a reliable source of hot water but also contributes to long-term energy savings and environmental sustainability.
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