The Cayman / Model CWI

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 a choice of a standing pilot or 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 Member

Constructed and tested in accordance with ASME American Society of Mechanical Engineers Section Four

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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:	Standing Pilot or 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 (BTU/HR)	D.O.E HEATING CAPACITY (BTU/HR)	IBR NET RATING (BTU/HR)	AFUE %		TANKLESS HEATER (GAL/MIN)	WATER CONTENT (GALS.)	APPROX. SHIPPING WEIGHT (LBS)
MODEL NUMBER	NO. OF SECTIONS	INPUT (BTU/HR)	D.O.E HEATING CAPACITY (BTU/HR)	IBR NET RATING (BTU/HR)	STANDING PILOT	ELECTRONIC IGNITION	TANKLESS HEATER (GAL/MIN)	WATER CONTENT (GALS.)	APPROX. SHIPPING WEIGHT (LBS)

CWI069	3	69,000	57,000	50,000	81.0	83.1	N/A	7.8	362
CWI103	4	103,000	86,000	75,000	81.3	83.1	2.50	10.0	432
CWI138	5	138,000	115,000	100,000	81.6	83.1	3.00	12.2	523
CWI172	6	172,000	144,000	125,000	81.8	83.2	3.50	14.4	589
CWI207	7	207,000	173,000	150,000	82.1	83.2	3.75/4.50***	16.6	669
CWI241	8	241,000	202,000	175,000	81.1	83.2	3.75/4.75***	18.8	757
CWI276	9	276,000	232,000	200,000	81.4	83.2	4.00/5.25***	21.0	839
CWI310	10	310,000	255,000	222,000	82.4**		4.00/5.25***	23.2	977
CWI345	11	345,000	284,000	247,000	82.3**		4.00/5.25***	25.4	1044
CWI379	12	379,000	312,000	271,000	82.2**		4.00/5.25***	27.6	1125

	CWI345 and CWI379 not available for use with LP Gas Combustion Efficiency **Rating with optional "high capacity" tankless heater 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). Specifications and dimensions are subject to change without notice. Consult factory if an unusual piping or pickup requirements exist. The Net I=B=R Water Ratings shown are based on a piping and pickup allowance of 1.15.

MODEL NUMBER	DIMENSION (INCHES)		FLUE COLLAR DIAMETER (INCHES)
MODEL NUMBER	A	C	FLUE COLLAR DIAMETER (INCHES)

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 (CWI)

Cayman Literature

Cayman Installation Manual

Gas Boiler User Manual