GAS Supply

Lochinvar

An outdoor unit should not be located so that high winds can deflect off of adjacent walls, buildings or shrubbery causing recirculation. Recirculation of flue products may cause operational problems, bad combustion or damage to controls. The unit should be located at least 3 feet (0.91m) from any wall or vertical surface to prevent adverse wind conditions from affecting performance.

Multiple unit outdoor installations require

48” (1.22 m) clearance between each vent cap. The outdoor cap must be located 4 feet (1.22 m) below and 4 feet (1.22 m) horizontally from any window, door, walkway or gravity air intake.

The combustion air inlet of the outdoor cap must be located at least one foot (0.30 m) above grade and above normal snow levels. The water heater must be at least 10 feet (3.05 m) away from any forced air inlet and at least 3 feet (0.91 m) outside any overhang.

Do not install in locations where rain from building runoff drains will spill onto the water heater.

Lochinvar must furnish an outdoor vent kit in accordance with CSA international requirements. Each kit includes the flue outlet/combustion air inlet, assembly, gasket and pump cover.

(TABLE C) - OUTDOOR VENT KIT PART NUMBERS

MODEL
NUMBER	PART NUMBER

CW 495	ODK3023
CW 645	ODK3024

CW 745	ODK3024
CW 986	ODK3046

CW 1256	ODK3047
CW 1436	ODK3047

CW 1796	ODK3048
CW 2066	ODK3048

Freeze Protection-

Outdoor Installation

A snow screen should be installed to prevent snow and ice accumulation around the appliance or its venting system.

If for any reason the unit is to be shut off: (a.) Shut off water supply.

(b.) Drain unit completely. (c.) Drain pump and piping.

If freeze protection is not provided for the system, a low ambient temperature alarm or automatic drain system is recommended.

1.The gas pressure regulator supplied is for low pressure service. If upstream pressure exceeds 6 oz. (10.5" water column), an intermediate gas pressure regulator, of the lock up type, must be installed.

2.The gas line should be a separate line direct from meter, unless the existing gas line is of sufficient capacity. Verify pipe size with your gas supplier.

3.A trap (drip leg) should be provided in the inlet gas connection to the water heater.

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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.