Installation & Operation Manual

6 Hydronic piping (continued)

Variable speed pump option

Table 6B Recommended Variable Speed Pumps

VFD PUMP

 

36.00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

33.00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30.00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

27.00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

24.00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

155

 

21.00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

199

FT/HD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

18.00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

285

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15.00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

399

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UPS26-96FC/VS

 

12.00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TACO 0013 IFC VS

 

9.00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UPS26-96 FC/VS 50%

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6.00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TACO 0013 IFC VS 50%

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

2

4

6

8

10

12

14

16

18

20

22

24

26

28

30

32

34

36

38

40

 

 

 

 

 

 

 

 

 

 

 

FLOW

 

 

 

 

 

 

 

 

 

 

Variable speed pumping to maintain a set differential temperature (ΔT) between two (2) sensors allows for the following:

-Automatic adjustment of the pump's performance to match the low of the system or zone

-Eliminate velocity noise in the zone valve systems

-Conserve energy

Since ΔT is directly releated to flow rate, the pump's speed continually adjusts to the required BTU per hour. In almost all applications the design of the system was based on being able to maintain a certain ΔT and figured by using the universal hydronics equation of BTU/hr = GPM x 500 x ΔT. Given that, any time there is a change to the heat load (i.e., warmer day or greater heat loss from a structure) then the GPM should change to match the required BTU/hr. This is achieved when the variable speed circulators automatically and continually adjust their GPM output (by varying speed) to match the required BTU/hr output of the system, no matter the changes in heat load, while always maintaining the designed ΔT between a supply and return sensor.

Variable speed pump setup

Before operation, ensure the following:

-Pump is set for an input signal of 0 - 10Vdc by the dip switches on the pump control

-Pump is set for external signal control (if applicable)

-Pump is set for linear output (if applicable)

-If pump does not come equipped with a 0 - 10 Vdc input option, an optional module will be required from the vendor

NOTICE

NOTICE

Pump sizing and flow requirements are based on 20 feet of piping, 4 - 90° elbows, and 2 - fully ported ball valves.

It is recommended that near boiler piping systems utilize Primary/Secondary configurations as shown in FIG.’s 6-3 through 6-9 only. The use of other near boiler piping configurations could result in improper building and system flow rates leading to inadvertent boiler high limit shutdowns and poor system performance if proper pump sizing and system flow rates are not adhered to.

SMART SYSTEM / Multi-temperature loop control option

The Knight wall mount boiler is capable of producing up to three (3) set point temperatures to meet different space heating demands. When using more than one temperature demand it is necessary to protect the lower temperature loop from overheating. To help aid with this protection, Lochinvar offers the Multi- Temperature Loop Control Board Kit (RLY30086).

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Image 37
Lochinvar WH 55-399 operation manual Variable speed pump option, Smart System / Multi-temperature loop control option

WH 55-399 specifications

The Lochinvar WH 55-399 is a high-efficiency water heater designed for residential and commercial applications, offering a reliable solution for hot water needs. This model represents an advanced approach to water heating, combining cutting-edge technologies and features that ensure optimal performance and energy efficiency.

One of the standout features of the Lochinvar WH 55-399 is its high thermal efficiency, which is a key factor in reducing energy consumption and operating costs. With an efficiency rating exceeding 90%, this water heater ensures that more energy is converted into usable hot water, making it an environmentally friendly choice.

The WH 55-399 utilizes advanced condensing technology, which allows it to extract additional heat from the exhaust gases before they are expelled. This process not only increases efficiency but also significantly decreases greenhouse gas emissions. The unit is also equipped with an intelligent control system that allows for precise temperature adjustments, ensuring that the user has an optimal supply of hot water while maintaining energy savings.

Another important aspect of this model is its impressive recovery rate. The ability to quickly heat water after a significant draw ensures that users will not experience interruptions in their hot water supply, making it ideal for busy households or commercial environments. This is particularly beneficial in applications requiring consistent hot water availability, such as restaurants or athletic facilities.

The Lochinvar WH 55-399 is designed with durability in mind. Constructed from high-quality materials, this water heater boasts a robust tank lined with corrosion-resistant coatings, extending the lifespan of the unit and reducing maintenance needs. Additionally, it features a reliable gas burner and a well-insulated tank, contributing to its overall efficiency and performance.

Safety is also a priority with the WH 55-399. The unit incorporates multiple safety features, including a flame sensor, automatic shut-off valve, and over-temperature protection, ensuring peace of mind for users.

In summary, the Lochinvar WH 55-399 stands out with its combination of high efficiency, advanced technology, and durable construction. Whether for residential or commercial use, this water heater provides a dependable and cost-effective solution for all hot water needs. Its innovative design and performance characteristics make it a top choice for anyone seeking a premium water heating option.