Manuals / Lochinvar / Household Appliance / Boiler

Lochinvar 1.0- 1.3- 1.5 operation manual Rate and Temperature Conversions, Deg C Deg F Voltages

Models: 1.0- 1.3- 1.5

1 24
Download 24 pages 39.59 Kb
Page 17
Image 17

Modbus Instructions

5Unit Operation (continued)

Rate and Temperature Conversions:

Rate

When issuing a rate command the rate can be communicated as percent modulation or a desired setpoint, depending on the setting of the BMS Type in the BMS Setup Menu.

The proper data format for the modulation percentage is the direct conversion to hexadecimal. This conversion can be accomplished through online number based converters or some scientific calculators.

For Example:

Rate %

HEX

 

 

0

00

 

 

20

14

 

 

45

2D

 

 

60

3C

 

 

80

50

 

 

95

5F

 

 

100

64

 

 

To send a desired setpoint, the hexadecimal value must be determined through linear interpolation of programmable parameters on the BMS Setup Menu:

-BMS temperature set-point at low analog input

-BMS temperature set-point at high analog input

These variables set the temperature values corresponding to the minimum and maximum voltage settings of the 0-10 volt signal. The defaults are as follows:

 

DEFAULT

DEFAULT

PARAMETER

VALUES

 

 

 

 

 

Deg C

Deg F

Voltages

 

 

 

 

BMS temperature setpoint at

21

69.8

2

low analog input

 

 

 

 

 

 

 

BMS temperature setpoint at

82

179.6

10

high analog input

 

 

 

 

 

 

 

For Example:

Send a setpoint of 110°F.

The formula to use for the interpolation is:

Rate Command =

(Desired Setpoint – BMS Temp at Low Analog Input) (High

Voltage-Low Voltage) + Low Voltage

(BMS Temp at High Analog Input – BMS Temp at Low

Analog Input)

From the default values:

Desired Setpoint = 110

BMS Temp at Low Analog Input =68

BMS Temp at High Analog=158

High Voltage =10

Low Voltage = 2

[(110-69.8)(10-2)/(179.6-69.8)] + 2 = 4.92 Volts

(4.92/10) x 100 = 49.2

49 = 31 Hexadecimal

A value of [00][31] in hexadecimal would be written to Holding register 40003 to issue a command for a 110°F setpoint.

Temperature

The SYNC boiler passes temperature data in degrees Celsius. Also, to accommodate decimal places the decimal value must be divided by 10.

Here are the conversions to and from Celsius:

T

= (5/9) * (T

-32)

T = (9/5) * T

+32

c

f

 

f

c

 

Example:

Outdoor temperature from remote sensor on BAS System = 80°F

80°F = 26.7°C

Data that needs to be transmitted is 26.7 * 10 = 267

Decimal

Binary

HEX

 

 

 

267

100001011

10B

Outlet temperature from unit sensor = 155°F

155°F = 68.3°C

Data transmitted from unit in HEX = 2AB = 683 683 ÷ 10 = 68.3 (°C)

Decimal

Binary

HEX

 

 

 

683

1010101011

2AB

 

 

 

17

Page 16 Page 18
Page 17
Image 17
Lochinvar 1.0- 1.3- 1.5 operation manual Rate and Temperature Conversions, Deg C Deg F Voltages
Page 16 Page 18

1.0- 1.3- 1.5 specifications

Lochinvar has long been recognized as a leader in the water heating industry, offering high-efficiency solutions for residential and commercial applications. Among its celebrated products are the Lochinvar 1.0, 1.3, and 1.5 models, which represent a range of advanced technologies and features designed to meet diverse customer needs.

The Lochinvar 1.0 is crafted for residential applications, featuring a robust design that emphasizes energy efficiency and reliability. This model incorporates condensing technology, ensuring that water heating is optimized, resulting in reduced energy costs. With a thermal efficiency rating of up to 95%, the Lochinvar 1.0 significantly lowers fuel consumption while providing ample hot water for households. This model also includes a digital control system that offers precise temperature management, enhancing user convenience.

Moving up the scale, the Lochinvar 1.3 model is tailored for slightly larger residential needs and small commercial spaces. This model not only maintains high efficiency with a similar condensing technology but also boasts an expanded capacity. It is equipped with advanced features like an integrated tankless design, which ensures an uninterrupted supply of hot water without the need for a bulky storage tank. Moreover, the Lochinvar 1.3 offers advanced diagnostics, allowing homeowners and technicians to troubleshoot issues quickly and efficiently.

The Lochinvar 1.5 model ramps up the capability even further, catering to larger commercial applications or extensive residential requirements. It offers exceptional performance with an increased output and efficiency, ensuring that even in high-demand scenarios, users are not left wanting for hot water. With an impressive thermal efficiency rating exceeding 96%, this model is engineered to meet stringent energy regulations while providing reliable performance.

All three models feature durable components including stainless steel heat exchangers, enhancing longevity and resistance to corrosion. They also integrate user-friendly interfaces, making them accessible for easy adjustments and monitoring. Additionally, all Lochinvar models are designed with environmental responsibility in mind, contributing to reduced greenhouse gas emissions.

In summary, Lochinvar's 1.0, 1.3, and 1.5 models showcase a commitment to innovation in water heating technology. They offer a blend of efficiency, capacity, and user-friendly features suitable for various applications, making them a wise choice for those in search of reliable hot water solutions.