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Lochinvar
51-211 operation manual
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Contents
Main
Models: 51 - 211
Hazard definitions
Contents
DANGER WARNING CAUTION CAUTION NOTICE
Please read before proceeding
When servicing boiler
Boiler operation
Boiler water
Freeze protection fluids
The Knight Wall Mount Boiler - How it works...
Front View
Left Side (inside unit)
Right Side (inside unit)
The Knight Wall Mount Boiler - How it works...
Models 51 - 211
FRONT OF UNIT
Bottom View
Ratings
Knight Wall Mount Boiler AHRI Rating
Other Specifications
Installation must comply with:
Before locating the boiler, check:
Closet and alcove installations
Provide clearances:
*
Provide air openings to room:
Wall mounting location
Residential garage installation
Vent and air piping
1
When using an existing vent system to install a new boiler:
1
When removing a boiler from existing common vent system:
2
Remove boiler from wood pallet
Gas conversions
2
Mounting the boiler
Direct venting options - Sidewall Vent
Direct venting options - Vertical Vent
Install vent and combustion air piping
Air intake/vent connections
AIR
Requirements for installation in Canada
Minimum / Maximum allowable combustion air and vent piping lengths are as follows:
Model Kit Number Equivalent Vent Length
Sizing
Model 2" Max Vent/Air 3" Max Vent/Air
Materials
Air inlet pipe materials:
Optional room air
PVC/CPVC
Approved PVC/CPVC Vent Pipe and Fittings
Model
Polypropylene
Stainless steel vent
ProTech Heat Fab Z Flex
FasNSeal Saf-T Vent Z-Vent
Vent/air termination sidewall
Model Kit Number Vent Size
Determine location
Vent/air termination sidewall
Prepare wall penetrations
Prepare wall penetrations (Alternate - Field Supplied Option)
Multiple vent/air terminations
Sidewall termination optional concentric vent
Description and usage
Sidewall termination optional concentric vent models
Sidewall termination optional concentric vent
Vent/air termination vertical
Determine location
Vent/air termination vertical
Multiple vent/air terminations
Prepare roof penetrations
5
Vertical termination optional concentric vent
Description and usage
Vertical termination optional concentric vent
5
Alternate vertical concentric venting
Concentric Venting Arrangement
Model Vent / Air Inlet Size Minimum Existing
Vent / Chase Size
Page
System water piping methods
Low water cutoff device
Chilled water system
Freeze protection
General piping information
Near boiler piping components
Near boiler piping connections
VENT AIR
Figure 6-1A Near Boiler Piping w/Y-Strainer
Figure 6-1B Near Boiler Piping w/Low Loss Header
VENT AIR
20F Temperature Rise Applications
25F Temperature Rise Applications
35F Temperature Rise Applications
Variable speed pump option
Minimum Temperature Rise*
SMART SYSTEM / Multi-temperature loop control option
BOILER INDIRECT DHW TANK
COLD WATER IN
MAKE UP WATER
Figure 6-3 Single Boiler - Single Temperature Zoned with Circulators
NOTICE
INDIRECT DHW TANK
MAKE UP WATER
NOTICE
MAY SUBSTITUTE LOW LOSS HEADER
NOT TO EXCEED 4 PIPE DIA OR MAX. OF 12" APART
Figure 6-5 Single Boiler - Multiple Temperatures
NOTICE
COLD WATER IN
MAKE UP WATER
HOT WATER OUT
Figure 6-6 Multiple Boilers - Multiple Temperatures
NOTICE
Figure 6-7 Multiple Boilers - Multiple Temperatures with DHW Piped as a Zone
COLD WATER IN
NOTICE
IMG00189
MAKE UP WATER
Figure 6-8 Single Boiler Zoned with Valves
NOTICE
INDIRECT DHW TANK
MAKE UP WATER
MAY SUBSTITUTE LOW LOSS HEADER
Figure 6-9 Multiple Boilers Zoned with Valves
211 2" 2-1/2" 3" 3-1/2" 3-1/2" 4" 4"
NOTICE
Figure 6-10 Single Boiler - Non-Zoned Primary/Secondary Piping
BOILER INDIRECT DHW TANK
NOTICE
MAKE UP WATER
7
Connecting gas supply piping
7
Natural gas:
Propane Gas:
7
Natural Gas Pipe Capacity Chart Length of Pipe in Straight Feet for 1/2 PSI
Check inlet gas supply
7
Gas Pressure
Gas valve replacement
DETAIL
8
Installation must comply with:
Low voltage connections
Line voltage connections
8
Thermostat
Outdoor temperature sensor
DHW thermostat
Louver relay
8
Boiler management system
Runtime contacts
Alarm contacts
Wiring of the cascade
8
Figure 8-4 Low Voltage Field Wiring Connections
9
Condensate drain
Check/control water chemistry
Freeze protection (when used)
Fill and test water system
Purge air from water system
Check for gas leaks
Check thermostat circuit(s)
Inspect/fill condensate system
10
Final checks before starting the boiler
Start the boiler
If boiler does not start correctly
Check system and boiler
Page
10
Check flame and combustion (continued) Set space heating operation
Set domestic hot water (DHW) operation
NOTICE
General
How the boiler operates
How the control module operates
Control inputs and outputs
Temperature control
Protection features
Boiler temperature regulation
Cascade
Outdoor reset operation, if used
Sequence of operation
OPERATION DISPLAY
Sequence of operation (continued)
Access modes
Saving parameters
OPERATION DISPLAY
Knight wall mount boiler control module
Status Display Screens Section Display Description
A (Boiler Status Bar)
B (Call for Heat Indicators)
A C D
%
B F E
Status Display Screens Section Display Description
C (Operational Information)
Page
Maintenance and annual startup
Service technician
Owner maintenance
Address reported problems
Inspect boiler area
Check all piping for leaks
Inspect boiler interior
Clean condensate trap
12
Inspect ignition and flame sense electrodes
Check ignition ground wiring
Check all boiler wiring
Check control settings
Check flame signal
Review with owner
Cleaning boiler heat exchanger
12
Oiled bearing circulators
13
Figure 13-1 Ladder Diagram
1
2
3
13
Figure 13-2 Wiring Diagram
BOX DEPICTS OPTIONAL ITEMS
HIGH VOLTAGE
LOW VOLTAGE 120 VAC