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Lochinvar
51-211 2 Operating Instructions, Start-up, Installation & Operation Manual
Models:
51-211
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60
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Specification
Install
A Natural Gas Pipe Size Chart
Gas valve replacement
Dimension
Maintenance
Configuration of the cascade
Low voltage wiring connections knockouts
Address reported problems
Outdoor air reset
Page 60
Image 60
Installation & Operation Manual
10
Start-up
Figure
10-2
Operating Instructions
60
Page 59
Page 61
Page 60
Image 60
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Page 61
Contents
Installation & Operation Manual Models 51
WBII-I-O Rev
Save this manual for future reference
Hazard definitions
DANGER
CAUTION CAUTION NOTICE
Contents
When servicing boiler
Installation & Operation Manual
Please read before proceeding
Boiler operation
2. Combustion chamber access cover
7. Boiler outlet temperature sensor housed with high limit sensor
8. Boiler inlet temperature sensor
9. Temperature and pressure gauge field installed, not shown
The Knight Wall Mount Boiler - How it works... continued
Models 51
Front View
Bottom View
Other Specifications
Ratings
Knight Wall Mount Boiler AHRI Rating
Figure A High Altitude Label Location
Installation must comply with
Closet and alcove installations
Clearances for service access
1 Determine boiler location
Figure 1-1 Closet Installation - Minimum Required Clearances
Figure 1-2 Alcove Installation - Minimum Required Clearances
Installation & Operation Manual
1 Determine boiler location
Installation & Operation Manual
Residential garage installation
Precautions
1 Determine boiler location continued
When using an existing vent system to install a new boiler
Table 1A Corrosive Contaminants and Sources
Products to avoid
Areas likely to have contaminants
When removing a boiler from existing common vent system
Installation & Operation Manual
1 Determine boiler location continued
Figure 2-2 Gas Valve Power Switch & Venturi Removal
2 Prepare boiler
Remove boiler from wood pallet
Gas conversions
Figure 2-3 Installing Propane Orifice
2 Prepare boiler continued
Mounting the boiler
Mounting to a wood studded wall
3 General venting
Direct venting options - Sidewall Vent
Direct venting options - Vertical Vent
for more details
Install vent and combustion air piping
3 General venting continued
Air intake/vent connections
Figure 3-6 Near Boiler Air Piping
Requirements for installation in Canada
Sizing
Model
2 Max Vent/Air
Materials
Air inlet pipe materials
Installation & Operation Manual
3 General venting continued
Optional room air
Air contamination
Table 3C Optional Room Air Kit
Model
2to 3 increaser are required to be CPVC when PVC/CPVC vent is used
For installations using 2 vent, the first seven
Approved PVC/CPVC Vent Pipe and Fittings
PVC/CPVC
Polypropylene
Centrotherm InnoFlue SW
Table 3E Polypropylene Vent Pipe and Fittings
Approved Polypropylene Vent Manufacturers
Heat Fab
Z Flex
ProTech
Stainless steel vent
If using the alternate sidewall termination
4 Sidewall direct venting
Vent/air termination - sidewall
Determine location
4 Sidewall direct venting continued
Figure 4-2A Clearance to Gravity Air Inlets
Figure 4-3A Clearance to Forced Air Inlets
Vent/air termination - sidewall
Figure 4-4B Polypropylene Sidewall Termination Assembly
Figure 4-4A PVC/CPVC Sidewall Termination Assembly
Prepare wall penetrations
Prepare wall penetrations Alternate - Field Supplied Option
Multiple vent/air terminations
Installation & Operation Manual
4 Sidewall direct venting continued
Sidewall termination installation
Figure 4-7 Kit Contents
Sidewall termination - optional concentric vent
Description and usage
Figure 4-8 Concentric Vent Dimensional Drawing
Figure 4-9 Rain Cap to Vent Pipe Alternate Assembly
Sidewall termination - optional concentric vent models
Installation & Operation Manual
Figure 4-10 Concentric Vent Sidewall Attachment
Multiventing sidewall terminations
Figure 4-11 Concentric Vent and Combustion Air Termination
Installation & Operation Manual
5 Vertical direct venting
Vent/air termination - vertical
Figure 5-1B Stainless Steel Vertical Termination of Air and Vent
Installation & Operation Manual
Prepare roof penetrations
Figure 5-2 Vertical Terminations with Multiple Boilers
Figure 5-3 Alternate Vertical Terminations with Multiple Boilers
5 Vertical direct venting
Vertical termination installation
Figure 5-5 Do Not Install U-Bend to Rain Cap
5 Vertical direct venting continued
Vertical termination - optional concentric vent
Figure 5-6 Concentric Vent Roof Installation
Multiventing vertical terminations
Figure 5-7 Concentric Vent and Combustion Air Vertical Termination
Installation & Operation Manual
Alternate vertical concentric venting
Vent / Air
Minimum Existing
Inlet Size
Existing vent as a chase
Figure 5-10 Existing Vent as a Chase
Installation & Operation Manual
5 Vertical direct venting
6 Hydronic piping
System water piping methods
General piping information
Low water cutoff device
12. System temperature sensor
Temperature and pressure gauge
Near boiler piping components
Boiler system piping
6 Hydronic piping continued
Near boiler piping connections
Circulator sizing
Figure 6-1A Near Boiler Piping w/Y-Strainer
20F Temperature Rise Applications
25F Temperature Rise Applications
35F Temperature Rise Applications
Figure 6-2 Pressure Drop vs. Flow - Models 51
Minimum Temperature Rise
SMART SYSTEM / Multi-temperature loop control option
Variable speed pump setup
Pump
Figure 6-3 Single Boiler - Single Temperature Zoned with Circulators
Installation & Operation Manual
6 Hydronic piping
MAKE UP WATER
Number of Units
Model
Required Pipe Sizes
Installation & Operation Manual
Figure 6-5 Single Boiler - Multiple Temperatures
Installation & Operation Manual
WIRES
24V SIGNAL TO
Figure 6-6 Multiple Boilers - Multiple Temperatures
Required Pipe Sizes
Installation & Operation Manual
6 Hydronic piping continued
Model
6 Hydronic piping
Number of Units
Required Pipe Sizes
Figure 6-8 Single Boiler Zoned with Valves
Installation & Operation Manual
6 Hydronic piping continued
BOILER
Model
Figure 6-9 Multiple Boilers Zoned with Valves
Installation & Operation Manual
6 Hydronic piping
Figure 6-10 Single Boiler - Non-Zoned Primary/Secondary Piping
Installation & Operation Manual
6 Hydronic piping continued
BOILER
Connecting gas supply piping
7 Gas connections
Figure 7-1 Gas Supply Piping
Figure 7-2 Inlet Pipe with Backup Wrench
7 Gas connections continued
Natural gas
Propane Gas
Natural Gas Pipe Capacity Chart
Table 7A Natural Gas Pipe Size Chart
Check inlet gas supply
Length of Pipe in Straight Feet for 1/2 PSI
Gas valve replacement
Gas Pressure
Figure 7-3 Inlet Gas Supply Check
Installation & Operation Manual
8 Field wiring
Installation must comply with
Figure 8-2 Line Voltage Field Wiring Connections
Figure 8-3 Routing Field Wiring
8 Field wiring continued
Outdoor temperature sensor
Louver proving switch
Flow switch
Alarm contacts
Wiring of the cascade
System supply sensor
Boiler management system
Figure 8-4 Low Voltage Field Wiring Connections
8 Field wiring continued
Installation & Operation Manual
9 Condensate disposal
Condensate drain
Figure 9-1 Condensate Disposal
Installation & Operation Manual
Freeze protection when used
10 Start-up
Check/control water chemistry
Fill and test water system
Clean/Inspect Trap Assembly
Check for gas leaks
Check thermostat circuits
Inspect/fill condensate system
Final checks before starting the boiler
Start the boiler
If boiler does not start correctly
Check system and boiler
Figure 10-2 Operating Instructions
Installation & Operation Manual
10 Start-up
Table 10A Flue Products Chart
Adjust set point temperatures
Check flame and combustion continued
Set space heating operation
Set DHW boiler target temperature
Configuration of the cascade
Set domestic hot water DHW operation
Verify DHW mode
0 - 10V input set point or power
11 Operating information
General
How the boiler operates
Temperature control
Protection features
Ramp delay
Outdoor air reset
Boiler temperature regulation
Run-time and alarm outputs
Service reminder
Error logging
Outdoor reset operation, if used
Target temperature with outdoor reset
Reset curve
SWITCHING ON SEQUENCE
Sequence of operation
OPERATION
DISPLAY
Installation & Operation Manual
Access modes
Installer
Sequence of operation continued
User
Knight wall mount boiler control module
Figure 11-1 Control Panel
11 Operating information continued
Indicators
Boiler Status
Call for Heat
Status Display Screens
Installation & Operation Manual
11 Operating information continued
Information
Operational
Dial Function
key function
NAVIGATION
RIGHT SELECT
12 Maintenance Maintenance and annual startup
Service technician
Owner maintenance
Table 12A Service and Maintenance Schedules
12 Maintenance
Address reported problems
Clean condensate trap
Inspect boiler area
12 Maintenance continued
Check ignition ground wiring
Check all boiler wiring
Check control settings
Check flame signal
Cleaning boiler heat exchanger
Figure 12-2 Burner Assembly
Review with owner
Table 12B Heat Exchanger Cleaning Kits
Oiled bearing circulators
Figure 12-3 Rope Gasket - Heat Exchanger Door
12 Maintenance continued
13 Diagrams
Figure 13-1 Ladder Diagram
PC INTERFACE
Figure 13-2 Wiring Diagram
13 Diagrams
Installation & Operation Manual
LOW VOLTAGE
Revision I ECO #C10450 reflects changes made to Table 10A on page
WBII-I-O Rev I 05/12
