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Catalog No.:  2000.20P 

Effective:  12-1-07 

Replaces:  4-1-05 

Job:  

         

 

 

Engineer:  

         

 

 

Contractor:  

         

 

 

Prepared By:  

         

 

 Date:  

         

 

 

Model:   

         

 

 Indoor/Outdoor:  

         

 

 

 

 

EFFICIENT 

 

82% thermal efficiency – highest of any atmospheric 
boiler available today 

THERMAL SHOCK PROOF 

 

Twenty-year warranty against thermal shock damage 
up to 150°F differential 

 

Maximum operating temperature: 230°F 

LIGHTWEIGHT 

 

A floor load of 70 lbs./sq. ft. or less 

HIGH RECOVERY 

 

Cuts fuel costs substantially because the standby and 
radiation losses normal to other boilers are eliminated 

LOW WATER OPERATING TEMPERATURE 

 

Operates with water temperature as low as 105°F 
without condensing 

 

 

 

Heat Exchanger 

ƒ

  ASME Inspected and Stamped 

160 PSIG 

ƒ

  National Board Approved 

ƒ

  Glass-lined Cast Iron Headers 

ƒ

 Copper 

Finned 

Tubing 

ƒ

  ASME Steel Tube Sheet 

ƒ

 Silicone 

O-Rings 

ƒ

  45 PSIG ASME Pressure Relief 

Valve 

ƒ

  Temperature and Pressure Gauge, 

Shipped Loose 

ƒ

  Rear Water Connection 

ƒ

  Pump – Optional 

 Bronze, 1/8 HP

120 Volt, 1

∅,

 60 Hz 

 Cast Iron, 1/8 HP

120 Volt, 1

∅,

  

60 Hz 

Controls 

ƒ

  120V, 60Hz, 1 Ph Power Supply 

ƒ

 120/24V 

Transformer 

ƒ

  100% Pilot Shut-off/Lockout 

ƒ

  Electronic, Intermittent Ignition (IID) 

Pilot 

ƒ

  High Limit Control - Automatic 

ƒ

 On/Off 

Switch 

ƒ

  Operating Limit Control 

ƒ

  Economaster II Pump Time Delay 

Gas Train 

ƒ

  Manual Main Gas Shut-off Cock 

ƒ

  Main Gas Pressure Regulator 

ƒ

  Redundant Safety Shut-off Valve 

ƒ

  Control Valve         

ƒ

  Mechanical Modulation (H1) 

ƒ

 Fuel 

 Natural Gas 
 Propane Gas     

ƒ

  Design Certified ANSI Z21.13/ 

CSA 4.9  

 

Construction 

ƒ

 Front 

Controls 

ƒ

  Stainless Steel Burners 

ƒ

  Polytuf Powder Coat Finish 

ƒ

 Vent 

Selection 

 Draft Diverter (Indoor) –  

Option D-10 

 Stackless Top (Outdoor) –  

Option D-11 

 High-Wind Top (Outdoor) –  

Option D-13 

ƒ

  Base – Optional  

 Combustible Floor Shield –  

Option J-1 

ƒ

  Vent Damper – Indoor Residential 

models only 
 
NOTE: Unit cannot be installed  
outdoors in residential applications. 

 
 

 

 

 

Raytherm

®

 

- Type H

Hydronic Heating Boilers

Residential 

Œ

 Commercial 

Model 133

INDOOR MODEL 

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