Lochinvar Crest 751 Manuals

Manuals and User Guides for Lochinvar Crest 751. We have 2 Lochinvar Crest 751 manuals available for free PDF download: Installation & Operation Manual, Supplemental Manual

Lochinvar Crest 751 Installation & Operation Manual

Lochinvar Crest 751 Installation & Operation Manual (64 pages)

Brand: Lochinvar | Category: Boiler | Size: 21.19 MB

Table of Contents

Hazard Definitions

2
- Table of Contents
  2
Please Read before Proceeding

3
The Crest - How It Works

4
Ratings

6
1 Determine Boiler Location

7
2 General Venting

14
3 VERTICAL DIRECT VENTING Vent/Air Termination - Vertical

21
- Determine Location
  21
- Prepare Roof Penetrations
  21
- Termination and Fittings
  21
- Multiple Vent/Air Terminations
  22
- Determine Location
  23
- Sidewall Direct Venting
  23
4 SIDEWALL DIRECT VENTING Vent/Air Termination - Sidewall

24
- Prepare Wall Penetrations
  25
- Termination and Fittings
  25
- Multiple Vent/Air Terminations
  25
- Room Air
  26
5 Hydronic Piping

27
- System Water Piping Methods
  27
- Low Water Cutoff Device
  27
- Chilled Water System
  27
- Freeze Protection
  27
- General Piping Information
  27
- Circulator Sizing
  28
- Near Boiler Piping Components
  29
- Gas Connections
  34
6 GAS CONNECTIONS Connecting Gas Supply Piping

34
- Natural Gas
  35
  - Pipe Sizing for Natural Gas
    35
  - Natural Gas Supply Pressure Requirements
    35
- Propane Gas
  35
  - Pipe Sizing for Propane Gas
    35
  - Propane Supply Pressure Requirements
    35
- Check Inlet Gas Supply
  36
- Gas Pressure
  37
- Gas Valve Replacement
  37
7 Field Wiring

38
- Line Voltage Connections
  38
- Low Voltage Connections
  39
- Wiring of the Cascade
  40
- Condensate Disposal
  42
8 CONDENSATE DISPOSAL Condensate Drain

42
9 Startup

43
- Check for Gas Leaks
  44
- Start the Boiler
  45
- For Your Safety Read before Operating
  46
- Operating Instructions
  46
- To Turn off Gas to Appliance
  46
10 OPERATING INFORMATION General

49
- Temperature Control
  49
- Cascade
  52
- Sequence of Operation
  53
- Home Screen
  54
- Main Screen
  55
11 Maintenance

56
- Maintenance and Annual Startup
  56
  - Check Burner Flame
    59
  - Check Flame Signal
    59
12 Diagrams

61
- Ladder Diagram
  61
- Wiring Diagram
  62
- Revision Notes
  64

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Lochinvar Crest 751 Supplemental Manual

Lochinvar Crest 751 Supplemental Manual (16 pages)

Condensing

Brand: Lochinvar | Category: Boiler | Size: 2.23 MB

Table of Contents

Hazard Definitions

2
- Table of Contents
  2
- Boiler Operation
  3
Please Read before Proceeding

3
- When Servicing Boiler
  3
The Crest -- How It Works

4
Ratings

5
1 Gas Connections

6
- Check Inlet Gas Supply
  6
- Gas Pressure
  7
- Gas Valve Replacement
  7
2 Start-Up

8
3 Diagrams

12
- Revision Notes
  16

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