Raypak 181 401 User Manual

Raytherm® - Type H  
Job:  
Engineer:  
Contractor:  
Prepared By:  
Model:  
Low NOx  
Hydronic Heating Boilers  
Date:  
Models 181-401 - Indoor  
Indoor  
LOW NOx  
Less than 40 nanograms per joule  
EFFICIENT  
82% 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 and  
tank-type water heaters are eliminated  
LOW WATER OPERATING TEMPERATURE  
Operates with water temperature as low as  
105°F without condensing  
Heat Exchanger  
Controls (cont'd)  
Temperature Controls  
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ASME Inspected and Stamped  
160 PSIG  
National Board Approved  
Headers  
Cast Iron Glass-lined – Standard  
Bronze – Option A-1  
Finned Tubing  
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High Limit Control, Manual Reset  
On/Off Switch  
Flow Switch  
Economaster II Pump Time Delay  
B-6 2-stage Aquastat –  
100-200ºF  
B-26 2-stage Digital Controller  
B-27 2-stage Digital Controller,  
Outdoor Reset  
Y-241 Electronic Sequencer,  
1-4 Stages  
Y-281 Electronic Sequencer,  
1-8 Stages  
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Gas Train  
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Natural Gas  
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Manual Main Gas Shut-off Cock  
Main Gas Pressure Regulator  
Redundant Safety Shut-off Valve  
Control Valve  
Copper – Standard  
Cupro Nickel – Option A-3  
ASME Steel Tube Sheet  
Silicone O-Rings  
ASME Pressure Relief Valve  
45 PSIG – Standard  
PSIG ASME – Optional  
Temperature and Pressure Gauge,  
Shipped Loose  
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Additional Safety Controls  
Firing Mode  
F-10 Low Water Cut-off Probe  
On/off (H4)  
Two-stage firing (H3)  
Design Certified  
I-1  
High Limit Control, Auto  
Reset  
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S-1 Low Gas Pressure Switch  
S-2 High Gas Pressure Switch  
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ANSI Z21.13 H Stamp  
Water Connections  
Construction  
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Left Hand – Standard  
Right Hand – Option A-6  
Flow Configuration – Two-pass  
Pump – Optional  
Front Controls  
Stainless Steel, Fan-Assisted  
Burners  
Polytuf Powder Coat Finish  
Draft Diverter  
Base – Optional  
Regulatory Agency Requirements  
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Mounted, 1/8 HP, 120 V, 1, 60 Hz  
Controls  
Combustible Floor Shield –  
Option J-1  
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120V, 60Hz, 1 Ph Power Supply  
120/24V Transformer  
100% Pilot Shut-off/Lockout  
Electronic, Intermittent Ignition (IID) Pilot  
Catalog No.: 2000.203E  
Effective: 12-1-07  
Replaces: 4-1-05  

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