Lochinvar 100208411 Variable Speed Pump for FTXL Fire Tube Boiler Installation Manual

Lochinvar 100208411 Variable Speed Pump for FTXL Fire Tube Boiler Installation Manual

Below you will find brief information for pump Knight 400 - 801, pump FTXL 400 - 850, pump Crest 751 - 5000. These pumps are designed for use with Lochinvar boilers. The document will guide you through the installation and setup process, including wiring connections and setting the pump's setpoint. It also includes tables for determining the appropriate pump setpoint for different temperature rise applications. You will also find information specific to each boiler model, including the proper wiring configuration.

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Grundfos Magna 3 Variable Speed Pump Installation Instructions | Manualzz

98624665 DIR# 2000505834 Rev B

INSTALLATION INSTRUCTIONS

GRUNDFOS MAGNA 3 VARIABLE SPEED PUMP WITH LOCHINVAR BOILERS

FOR KNIGHT 400 - 801, FTXL 400 - 850 AND CREST 751- 5000

Installation and Setup Procedure

1. Refer to the installation manual provided by the pump manufacturer to install the pump. NOTE: The boiler

MUST be installed in the Primary / Secondary piping configuration. A system supply sensor MUST be installed in the Primary (building) loop. Refer to the installation and operation manual provided by the boiler manufacturer to ensure the proper system piping configuration.

4. Reference Tables 1A, 1B and 1C on this instruction sheet to determine the setpoint percentage of the pump.

5. Follow the procedure below to apply the pump setpoint: a) From the pump Home screen use the arrow keys to b) Select “OK” to go to the Setpoint screen.

2. Reference FIG. 1 to connect wiring to the boiler’s low voltage control board on the “Boiler Pump Out” terminal: c) Use the arrow keys to to assign a setpoint based on the information provided in FIG. 2, on page 3.

d) Select “OK” to save the setting.

a) Connect the (+) wire from the boiler to “In” connection on the pump 0-10V wiring terminal. b) Connect the (-) wire from the boiler to the ground terminal on the pump 0-10V wiring terminal.

e) Select the “Home” button to return to the Home

screen.

3. Connect line voltage by supplying it directly to the pump.

For Knight and FTXL Models: Wire the boiler pump dry contacts located on the boiler’s line voltage terminal directly to the Magna 3 start/stop connection.

6. The pump is pre-programmed for 0-10V operation, but the boiler will require set-up to control the variable speed pump. Follow the instructions for variable speed pump setup in the boiler installation manual.

For Crest Models: Wire a relay to the 115V boiler pump connections on the boiler’s line voltage terminal. Connect the relay to the Magna 3 start/stop connection.

This method of line voltage supply allows the pump screen to stay on even when the boiler is in Standby mode. For additional information always reference the “Wiring” section in the boiler Installation and Operation Manual.

Figure 1 Wiring Connections

DETAIL A

A

POWER CONNECTION

IMG00960

98624665

Model

400

501

601

701

801

GPM

37

46

55

65

74

TABLE 1A - KNIGHT XL TEMPERATURE RISE APPLICATIONS

20°F

Magna 3 Setpoint (%) GPM

25°F

Magna 3

40-80 92% 30 40-80

50-150

50-150

50-150

50-150

42%

79%

79%

100%

37

44

52

60

50-150

50-150

50-150

50-150

Setpoint (%)

75%

83%

67%

64%

69%

Model

400

500

600

725

850

GPM

38

48

57

69

81

TABLE 1B - FTXL TEMPERATURE RISE APPLICATIONS

20°F

Magna 3

40-80

40-80

40-80

40-80

50-150

Setpoint (%)

54%

68%

79%

88%

50%

GPM

32

38

46

55

30°F

Magna 3

N/A

40-80

40-80

40-80

40-80

Setpoint (%)

45%

53%

60%

70%

GPM

29

34

40

40°F

Magna 3

N/A

32-60

40-80

40-80

Setpoint (%)

64%

46%

53%

Model

751

1001

1251

1501

1751

GPM

72

96

120

144

168

2001

2500

3000

3500

4000

5000

192

230

277

323

248 *

310 *

*Based on 30°F Temperature Rise

TABLE 1C - CREST TEMPERATURE RISE APPLICATIONS

20°F 40°F

GPM Magna 3

50-150

50-150

50-150

50-150

80-100

80-100

80-100

80-100

100-120

80-100

100-120

Setpoint (%)

42%

60%

67%

78%

64%

70%

82%

97%

97%

87%

92%

GPM

48*

48

60

72

84

96

115

138

161

186

233

Magna 3

40-80

40-80

40-80

40-80

50-150

50-150

50-150

50-150

50-150

80-100

80-100

Setpoint %

60%

60%

75%

91%

48%

54%

57%

69%

81%

64%

79%

40

48

56

64

77

92

108

124

155

60°F

Magna 3

N/A

40-80

40-80

40-80

40-80

40-80

50-150

50-150

50-150

50-150

Setpoint %

50%

60%

70%

81%

96%

46%

59%

61%

77%

DIR# 2000505834 Rev B 2

98624665

Figure 2 Pump Setpoint Screens

SETPOINT

MENU

HOME

BUTTON

DIR# 2000505834 Rev B 3

98624665

DIR# 2000505834 Rev B 4

Revision Notes: Revision A (ECO C14573) initial release.

Revision B (ECO C14859) reflects the update of Table 1A, Table 1B and other text adjustments.

Revision C (ECO C15375) reflects the addition of FTX Models and Table 1C.

Revision D (ECO C17117) reflects the addition of the system sensor note on page

1, Step 1.

DIR# 2000505834 Rev A (CN# 500000615) creation of TLT DIR in SAP.

Rev B (CN # 500000827) reflects the addition of Crest 751 - 1251 models and update of Tables 1B and 1C.

07/15 - Printed in U.S.A.

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Key Features

  • Variable speed operation
  • 0-10V control
  • Primary/secondary piping configuration
  • System supply sensor
  • Setpoint adjustment
  • Wiring diagrams
  • Temperature rise applications
  • Boiler model-specific instructions

Frequently Answers and Questions

How do I determine the appropriate pump setpoint?
Refer to Tables 1A, 1B, and 1C in the installation instructions to determine the setpoint percentage for your specific boiler model and temperature rise application.
What is the proper wiring configuration for the pump?
The installation instructions provide detailed wiring diagrams for connecting the pump to the boiler's low voltage control board and line voltage terminal. Refer to Figure 1 for wiring connections.
How do I set the pump's setpoint?
The setpoint can be adjusted using the arrow keys on the pump's control panel. You can access the Setpoint screen by selecting “Setpoint” from the Home screen. The installation instructions provide detailed steps for setting the pump's setpoint.
What is the difference in wiring for Knight/FTXL and Crest models?
For Knight and FTXL models, the boiler's pump dry contacts are wired directly to the Magna 3 start/stop connection. For Crest models, a relay is used to connect the boiler's 115V pump connections to the Magna 3 start/stop connection.

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