Cayman (CWI)


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The Cayman Series (CWI) residential/light commercial, cast iron, hot water boiler is a fully-packaged, installer-ready product. The integral draft diverter provides a low profile design allowing the boiler to be installed in areas requiring a low clearance. This atmospheric, gas-fired boiler is for use with a conventional chimney.

The Cayman Series is packaged with the option of either natural or LP gas as well as an electronic ignition system. The Cayman Series also includes an optional tankless coil for domestic hot water (see specifications) and a larger range of available sizes.


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Air Conditioning Heating and Refrigeration Institute AHRI MemberConstructed and tested in accordance with ASME American Society of Mechanical Engineers Section FourIntertek ETL Listed United States
Type:Residential / Light Commercial
Heat Exchanger:Cast Iron
Fuel:Gas Fired (Natural or LP)
Input:69 - 379 MBH*
Efficiency (AFUE)81% - 83.5%**
Venting:Chimney
Ignition:Electronic Ignition
Trim:Water
Domestic Water:Optional Tankless Coil
Burner:N/A
Configuration:Packaged
Notes:Designed for installation on combustible floors.
*Models with inputs of 300 MBH and above are considered commercial models.
**Models with inputs of 300 MBH and above are rated by combustion efficiency.

NATURAL OR LP GAS *
MODEL NUMBER NO. OF SECTIONS INPUT
(MBH)		 HEATING CAPACITY
(MBH)		 AHRI NET RATING
(MBH)

AFUE
%

 TANKLESS HEATER
(GAL/MIN)		 WATER CONTENT
(GALS.)		 APPROX. SHIPPING WEIGHT
(LBS)
                 
CWI103 4 103 86 75 83.1 2.50 10.0 432
CWI138 5 138 115 100 83.1 3.00 12.2 523
CWI172 6 172 144 125 83.2 3.50 14.4 589
CWI207 7 207 173 150 83.2 3.75/4.50*** 16.6 669
CWI241 8 241 201 175 83.2 3.75/4.75*** 18.8 757
CWI276 9 276 230 200 83.2 4.00/5.25*** 21.0 839
CWI311 10 310 252 219 81.4** 4.00/5.25*** 23.2 977
CWI346 11 345 281 244 81.4** 4.00/5.25*** 25.4 1044
CWI380 12 379 309 269 81.4** 4.00/5.25*** 27.6 1125
                 
  *CWI311-CWI380 not available for use with LP Gas
**Thermal efficiency
***Rating with optional "high capacity" tankless heater
  1. Altitudes above 2,000 ft. - ratings should be reduced at a rate of 4% for each 1,000 ft. above sea level (U.S.A. only).
  2. Specifications and dimensions are subject to change without notice.
  3. Consult factory if an unusual piping or pickup requirements exist.
  4. The AHRI Net Water Ratings shown are based on a piping and pickup allowance of 1.15.

MODEL
NUMBER		 DIMENSION  (INCHES) FLUE COLLAR DIAMETER
(INCHES)
A C
       
CWI069 12 - 3/4 40 - 7/16 4
CWI103 16 40 - 7/16 5
CWI138 19 - 1/4 40 - 7/16 6
CWI172 22 - 1/2 40 - 7/16 6
CWI207 25 - 3/4 40 - 7/16 7
CWI241 29 40 - 7/16 7
CWI276 32 - 1/4 40 - 7/16 8
CWI310 35 - 1/2 45 - 7/16 8
CWI345 38 - 3/4 45 - 7/16 9
CWI379 42 45 - 7/16 9

CWI General Configuration and Specifications


Cayman Literature

Date: 10/16/2012 11:33:58 AM
Size: 1.76 mb


Cayman Installation Manual 2012

Date: 8/22/2012 10:37:59 AM
Size: 1.7 mb


Cayman Installation Manual

Date: 11/29/2010 3:13:44 PM
Size: 1.39 mb


Cayman Troubleshooting

Date: 1/15/2013 5:15:12 PM
Size: 476.78 kb


Cayman Nomenclature

Date: 8/24/2012 3:20:06 PM
Size: 80.39 kb


Gas Boiler User Manual

Date: 10/16/2012 9:24:01 AM
Size: 832.74 kb