TM

Installation & Service Manual

7Gas connections

Connecting gas supply piping

1. Install ground joint union for servicing, when

required.

4.Support piping with hangers, not by the water heater or its accessories.

2. On Models SNR150-100 -- SNA285-125 install a manual

shutoff valve in the gas supply piping outside water heater

jacket when required by local codes or utility

requirements.

3. In Canada – When using manual main shutoff

valves, it must be identified by the installer.

￿WARNING

The gas valve and blower will not support the weight of the piping. Do not attempt to support the weight of the piping with the water heater or its accessories. Failure to comply could result in severe personal injury, death, or substantial property damage.

Figure 7-1Gas Supply Piping - Models SNR150-100 -- SNA285-125

5.

Purge all air from the gas supply piping.

6.

Before placing the water heater in operation, check the

 

water heater and its gas connection for leaks.

 

a. The appliance must be disconnected from the gas

 

supply piping system during any pressure testing of

GAS SUPPLY

DRIP LEG

UNION

MANUAL GAS SHUT OFF VALVE (FIELD SUPPLIED)

 

that system at a test pressure in excess of 1/2 PSIG

 

(3.5 kPa).

b.

The appliance must be isolated from the gas supply

 

piping system by closing a manual shutoff valve

 

during any pressure testing of the gas supply piping

 

system at test pressures equal to or less than 1/2 PSIG

 

(3.5 kPa).

c.

The appliance and its gas connection must be leak

 

tested before placing it in operation.

￿WARNING Do not check for gas leaks with an open flame – use the bubble test. Failure to use

the bubble test or check for gas leaks can cause severe personal injury, death, or substantial property damage.

Figure 7-2Gas Supply Piping - Models SNA400-125 -- SNA500-125

MANUAL GAS

SHUTOFF VALVE

(FACTORY SUPPLIED ON MODELS SNA400-125 -- SNA500-125)

7.Use pipe sealing compound compatible with propane gases. Apply sparingly only to male threads of the pipe joints so that pipe dope does not block gas flow.

GAS SUPPLY

DRIP LEG

UNION

35

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Lochinvar SNA500-125, SNR200-100, SNA285-125, SNR150-100, SNA400-125 Gas connections, Connecting gas supply piping
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SNA400-125, SNR150-100, SNA285-125, SNR200-100, SNA500-125 specifications

Lochinvar has established itself as a leader in the realm of high-efficiency heating solutions, and its line of condensing boilers, including the SNA500-125, SNR200-100, SNA400-125, SNA285-125, and SNR150-100, exemplifies the brand’s commitment to innovation, efficiency, and reliability.

The SNA500-125 model stands out with its impressive heating capacity, designed for larger commercial applications. Featuring advanced modulating burners, it can precisely adjust its output based on real-time demand, significantly enhancing energy efficiency. The stainless steel heat exchanger ensures robust durability and improved thermal performance, while the integrated controls offer advanced diagnostic capabilities and user-friendly operation.

Next in the lineup, the SNR200-100 serves as a versatile option for mid-sized applications. Its compact design allows for flexible installation, making it a valuable choice for facilities with limited space. The boiler incorporates a high-efficiency combustion system that maximizes fuel utilization, while its low NOx emissions technology aligns with environmental standards, reducing the carbon footprint of users.

The SNA400-125 delivers a robust solution for diverse heating needs, equipped with state-of-the-art modulation technology that not only optimizes efficiency but also offers quiet operation – a crucial feature for facilities where noise reduction is paramount. This model also includes built-in redundancy options, enhancing reliability during peak operational periods.

The SNA285-125 provides a balance of performance and efficiency for smaller commercial settings. Its innovative control system offers precise temperature management and easy integration with existing systems. Energy Star certified, this model is not only cost-effective but supports sustainability efforts in various industries.

Lastly, the SNR150-100 is ideally suited for light commercial applications, featuring a compact footprint and excellent heat transfer capabilities. The user-friendly interface and robust safety features make it an excellent choice for operators prioritizing both ease of use and reliability.

All these models incorporate Lochinvar's commitment to superior design and advanced technologies, setting a benchmark in the high-efficiency heating market. With a focus on long-term performance and compliance with modern environmental standards, Lochinvar continues to deliver top-tier solutions tailored to meet diverse customer needs. Whether for large-scale operations or smaller settings, these boilers represent a significant advancement in commercial heating technology.
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