Primary/Secondary Boiler Piping

Installation & Service Manual

4Water connections (continued)

PUMP INSTALLATION AND MAINTENANCE: The boiler circulating pump must be purchased locally. For installation and maintenance information on the circulator pump, refer to the pump manufacturers instruction package included with the pump.

Circulator Pump Specifications

1.Maximum operating pressure for the pump must exceed system operating pressure.

2.Maximum water temperature should not exceed nameplate rating.

3.Cast iron circulators may be used for closed loop systems.

4.A properly sized expansion tank must be installed near the boiler and located on the suction side of the pump.

Circulator Pump Operation

Boilers are equipped with a relay for controlling the circulation pump for the hot water loop. The relay turns ON and OFF in response to the “W” input from the wall thermostat or zone control.

The field installed boiler pump MUST NOT exceed 1 h.p. For continuous pump operation, wire the system pump to the 120V supply. The pump should be connected at the

PERFORMANCE LOOP

These units are equipped with an integral performance loop, which is designed to provide efficiency optimization by maintaining a constant flow through the unit’s heat exchanger loop when building system flow is reduced. The performance loop assembly is standard equipment and is NOT to be used as a system or boiler pump.

	NOTICE	The performance loop is dedicated to
	NOTICE	the unit and does not affect the


		building’s system or primary/secondary
		flow characteristics and will not
		circulate the building.

It is acceptable to remove the performance loop as long as the following requirements are met:

1.The boiler is piped to the system in primary/secondary fashion.

2.The system setpoint is 140°F or higher.

3.The boiler circulating pump is sized for the appropriate flow through the boiler.

4.The system sensor is installed in an acceptable location for sensing the system supply temperature.

5.If water temperature is below 140°F a low temperature bypass must be installed, (VAL30000 - 1 1/2" LTV Valve Kit) and follow the piping diagram in FIG. 4-4.

junction box as shown in FIG. 4-3.

120V

SUPPLY

NOTICE

WARNING

If removal of the performance loop is necessary, consult the manufacturer for a Solution Without a Performance Loop (KIT30068).

Failure to install the system sensor can cause operation problems such as nuisance high limit trips.

UNIT

CIRCULATION

PUMP

TO PERFORMANCE

LOOP PUMP (OPT.)

Figure 4-3_Boiler Wiring - Circulation Pump to Junction Box

A primary/secondary piping system may also be installed to ensure proper boiler flow rates. Primary/secondary piping is also ideal for systems using a mixture of propylene glycol and water. A primary/secondary piping system uses a dedicated pump to supply flow to the boiler only. This pump is sized based on desired boiler flow rate, boiler head loss and head loss in the secondary system piping only. The secondary pump, in- stalled in the boiler piping, ensures a constant water flow rate to the boiler for proper operation. Boiler installation with a primary/secondary piping system can prevent noise problems caused by low system water flows. A primary/secondary piping system is recommended on any boiler where low water flow conditions may present an operational problem.

000 - 260, 000 Btu/hr, 45 specifications

The Lochinvar 000 BTU/hr, 45,000 - 260 is a high-efficiency water heater designed for residential and commercial applications, showcasing advanced technologies that set it apart in the industry. With a powerful heating capacity of up to 260,000 BTU/hr, this unit is engineered to meet the varying demands of hot water for both large households and businesses.

One of the standout features of the Lochinvar 000 is its innovative design that maximizes energy efficiency. Utilizing condensing technology, this water heater captures and reuses exhaust gases that would otherwise be lost, thereby improving thermal efficiency significantly. The result is an impressive Energy Factor (EF) rating that not only promotes sustainability but also translates into lower energy bills for the end user.

The unit is equipped with a user-friendly digital control interface that simplifies operation and monitoring. This control system allows for precise temperature adjustments, ensuring that users can maintain their desired water temperatures effortlessly. Additionally, the advanced diagnostics provided by the control system help in troubleshooting potential issues before they develop into more significant problems, enhancing the reliability of the unit.

Durability is another hallmark of the Lochinvar 000. Constructed with high-quality materials, including a robust stainless-steel tank, this water heater is designed to withstand the rigors of daily use. The stainless-steel construction also helps to resist corrosion, which is a common issue in water heaters, thereby extending the lifespan of the unit.

Furthermore, Lochinvar has integrated safety features into the design of the 000 model, including an automatic shut-off system and advanced flame safeguard controls to prevent hazardous situations. This focus on safety ensures peace of mind for users, making it an ideal choice for family homes and workplaces alike.

In terms of installation, the Lochinvar 000 is relatively straightforward, with options for both indoor and outdoor setups. The compact design allows for flexible installation, accommodating various space requirements without compromising performance.

Overall, the Lochinvar 000 BTU/hr, 45,000 - 260 combines reliability, efficiency, and advanced technology, making it a superior choice for those seeking a powerful and dependable water heating solution. This water heater not only meets but exceeds modern expectations for performance and safety, catering to a wide range of hot water needs.

Lochinvar 45, 000 Btu/hr Primary/Secondary Boiler Piping, Circulator Pump Specifications

Models: 000 - 260 000 Btu/hr 45