N.CONNECT TANKLESS HEATER PIPING as shown in Figure 37a. See Table IV for Tankless Heater Ratings.

NOTICE

The following guidelines should be followed when piping the tankless heater:

1.Install Flow Regulator

If flow through the heater is greater than its rating, the supply of adequate hot water may not be able to keep up with the demand. For this reason a FLOW REGULATOR matching the heater rating should be installed in the cold water line to the heater. Refer to Figure 37a for piping recommendations. Locate the flow regulator below the inlet (cold water side) of the heater and a minimum of 36” away from the inlet so that the regulator is not subjected to excess temperatures during “off” periods when it is possible for heat to be conducted back through the supply line. The flow regulator will limit the flow of supply water regardless of inlet pressure variations ranging from 20 to 125 psi.

2.Install Water Temperature Mixing Valve

WARNING

Install a mixing valve at the tankless heater outlet to avoid risk of burns or scalding due to excessively hot water at fixtures. Do not operate the boiler when equipped with a tankless heater unless mixing valve is operating properly.

Refer to Figure 37a for piping recommendations. Adjust and maintain the mixing valve in accordance with manufacturers instructions.

Installation of a mixing valve will also lengthen the delivery of the available hot water by mixing some cold water with the hot. In addition, savings of hot

Figure 34: Mounting Elevations of M&M 150 and 63

Float Low Water Cut-Offs

Figure 35: Recommended Piping for Combination

Heating & Cooling (Refrigeration) Systems

Water Boilers

water will be achieved since the user will not waste as much hot water while seeking desired water temperature. Higher temperature hot water required by dishwashers and automatic washers is possible by piping the hot water from the heater prior to entering the mixing valve. An electric hot water booster can also be used. The mixing valve should be “trapped” by installing it below the cold water inlet to heater to prevent lime formation in the valve.

3.Flushing of Heater

All water contains some sediment which settles on the inside of the coil. Consequently, the heater should be periodically backwashed. This is accomplished by installing hose bibs as illustrated in Figure 37a and allowing water at city pressure to run into hose bib A, through the heater, and out hose bib B until the discharge is clear. The tees in which the hose bibs are located should be the same size as heater connections to minimize pressure drop.

4.Hard Water

A water analysis is necessary to determine the hardness of your potable water. This is applicable to some city water and particularly to well water. An appropriate water softener should be installed based on the analysis and dealer’s recommendation.

This is not only beneficial to the tankless heater but to piping and fixtures plus the many other benefits derived from soft water.

CAUTION

Do not operate tankless heater with hard water. Tankless failure will result. Install water softener if hard water is present.

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Burnham V9A manual Mounting Elevations of M&M 150 Float Low Water Cut-Offs

V9A specifications

Burnham V9A is a well-established model in the world of cast iron boilers, renowned for its efficiency and reliability in residential heating applications. As a part of Burnham's esteemed line of heating solutions, the V9A is designed to provide homeowners with consistent warmth while prioritizing fuel economy and ease of use.

One of the defining features of the Burnham V9A is its durable cast iron construction. This robust material enables the boiler to withstand high temperatures and pressures, ensuring a long service life. The V9A is engineered with several sections that are joined together, allowing for easier maintenance and potential adaptability to various heating demands. The boiler's design also promotes excellent heat retention, which not only enhances performance but contributes to overall energy efficiency.

In terms of technology, the Burnham V9A stands out with its advanced combustion design. With an efficiency rating of up to 85%, this model maximizes the heat output while minimizing fuel consumption. The boiler is compatible with both natural gas and propane, providing flexibility for users to choose their preferred fuel source. Additionally, the V9A is designed to operate with a minimum of venting requirements, making installation simpler and more cost-effective.

The Burnham V9A also features a choice of various firing rates, allowing homeowners to select the optimal heating output for their specific needs. This versatility ensures that the boiler can be effectively sized for different home environments, making it a highly adaptable option for a broad range of residential settings.

Moreover, one key characteristic of the Burnham V9A is its user-friendly control systems. It comes equipped with reliable electronic ignition and offers options for outdoor reset controls, which enhance efficiency by adjusting the boiler's operation based on the outdoor temperature. This advanced control capability not only optimizes energy use but also enhances comfort levels in the home.

Overall, the Burnham V9A represents a balance of durability, efficiency, and modern convenience, making it a top choice for homeowners seeking a reliable heating solution. Its combination of cast iron construction, advanced technology, and user-friendly features solidify its reputation in the competitive market of heating systems, ensuring comfort and peace of mind for years to come.