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Catalog No.:  2000.461A 

Effective:  07-21-10 

Replaces:  9-15-07

 

Job:  

         

 

Engineer:  

         

 

 

Contractor:  

         

 

 

Prepared By:  

         

 

 Date:   

         

   

Model:   

         

 

  Indoor/Outdoor:   

         

 

   MBTUH Input:   

         

 

 

 

100% Factory Fire Tested  
Efficiency: 84% 
Maximum Outlet Temperature: 230°F 
Minimum Non-Condensing Inlet Temperature: 105°F 
Thermal Shock Proof Heat Exchanger 
Limited Twenty-Year Thermal Shock Warranty 
Limited Ten-Year Closed-System Heat Exchanger 
Warranty 
PolyTuf Powder Coated Cabinet 
No Combustible Floor Shield Required 
Fan-Assisted 
Patented Burner Security Blanket 

 
 

 

Heat Exchanger 

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 H 

Stamp 

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 Headers 

 Glass-Lined Cast Iron – Standard  
 Bronze – Option A-1 

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  ASME Inspected and Stamped 

160 PSIG Working Pressure 

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  National Board Approved 

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 Fin 

Tubing 

 Copper – Standard  
 Cupro Nickel – Option A-3 

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  ASME Steel Tube Sheet 

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  Silicone High Temp O-Rings 

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  Pressure Relief Valve, ASME 

 45 PSIG – Standard on Model 399B  
 60 PSIG – Standard on Models 

499B-899B 

            PSIG – Optional 

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  Temperature and Pressure Gauge 

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 Water 

Connections 

 Left – Standard  
 Right – Option A-6 

 

Controls 

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  120V, 60Hz, 1 Phase Power Supply 

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  120/24V 60Hz Transformer 

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 100% 

Shut-Off/Lockout 

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  Hot Surface Ignition 

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  Remote Flame Sensor 

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  High Limit Control, Manual Reset 

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  On/Off Power Switch 

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  Manual Shut-Off, Front-Mounted Switch 

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 Flow 

Switch 

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  Blocked Vent Pressure Switch 

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  Combustion Air Proving Switch 

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  Pump Time Delay Relay 

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 Status 

Display 

Lights 

Gas Train 

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  Manual Gas Shut-Off Valve(s) 

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 Combination 

Valves 

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 Firing 

Mode 

 On/Off: Model 399B 
 2-Stage: Models  

499B-899B 

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 Fuel 

 Natural Gas  
 Propane Gas 

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  Design Certified - ANSI 

Z21.13/CSA 4.9 

 

Burner 

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  Ultra-Low NOx: Less than  

20 PPM

 

 

Construction 

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 Indoor/Outdoor 

Construction 

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  Enclosed Front Controls 

 

Venting 

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 Vent 

Location 

 Top, Outdoor – Standard 
 Top, Indoor – Option D-20 
 Rear – Option D-14 

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  Vent Termination Cap  

 Outdoor D-11 
 Indoor, Horizontal D-15 
 Indoor, Vertical (by others) 

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  Extractor – Optional  

 By others 
 Not required 

Temperature Controls 

 B-2 

Tankstat, Single-Stage  
(100-200°F) 

 B-3 

Tankstat, 2-Stage (100-200°F) 

 B-6 

Aquastat, 2-Stage (100-200°F) 

 B-__  TempTracker Digital Controller,   

2-Stage (Loose) 

 B-__  TempTracker Digital Controller,   

4-Stage (Loose) 

 

Options 

 C-6  Ignition Module, Manual Reset 
 F-10  Low Water Cut-Off, Remote Probe 
 I-1 

High Limit Control, Auto Reset 

 P-      Pump:            HP, 120V, 1

, 60Hz 

Water Hardness:       GPG 

 

 

 Cast Iron 

 Bronze 

 Mounted 

 Loose 

 

 

 Front 

 Rear 

 P-26  Cold Water Start (See 2000.48) 
 S-1 

Low Gas Pressure Switch, Manual 

 S-2 

High Gas Pressure Switch, 
Manual 

 X-1  SureRack™ Kit 
 X-2  SureRack Add-on 
                      

 

 

Regulatory Agency Requirements 

             

 

 
        

Delta Limited™ - Type H

   Space Heating/Hot Water Boilers 

Models 399B-899B

Shown with outdoor  

air inlet and pump covers

Proudly Made in the U.S.A 

Delta Limited models not approved for use in California

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