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TABLE 1a: GENERAL SPECIFICATIONS
Notes:
1. Net Ratings are based on piping and pick-up allowances of 1.15.
2. Burner Capacity Rating, GPH is based on #2 oil with a Gross
Heating Value equal to 140000 BTU/Gal.
3. Maximum Working Pressure, Water - 50 PSI.
4. Tankless Heater Ratings based on I=W=H test standard.
III Before Installing
1) Safe, reliable operation of this boiler depends upon installation by a professional heating contractor in strict
accordance with this manual and the requirements of the authority having jurisdiction.
• In the absence of an authority having jurisdiction, installation must be in accordance with this manual and the latest
edition of Installation of Oil Burning Equipment (ANSI/NFPA31).
• Where required by the authority having jurisdiction, this installation must conform to the latest edition of Standard for
Controls and Safety Devices for Automatically Fired Boilers (ANSI/ASME CSD-1).
2) Make sure that a properly sized chimney is available which is in good condition. Consult the authority having
jurisdiction, Part VI of this manual, and ANSI/NFPA31 for additional information on venting requirements.
TABLE 1b: OPTIONAL TANKLESS HEATER RATINGS
Power (“Side Wall”) Venting - Important Note
Two problems arise when any oil-fired appliance is power vented:
1. There is sometimes an accelerated rate of soot buildup on the oil burner cad-cell, spinner etc.
2. There is a potential for severe damage to the side of the structure in the event that the boiler operates at a high smoke
level. This can happen for many reasons, some of which are out of the control of both the installer and appliance
manufacturer.
Crown Boiler Company recommends the use of a chimney to vent the TWZ series boilers. If a power venter must be used,
it is the responsibility of the installer and power vent manufacturer to “engineer” the power vent system. CROWN
BOILER COMPANY WILL ASSUME NO RESPONSIBILITY FOR DAMAGE TO SIDING, ETC. FROM A POWER
VENTED OIL-FIRED BOILER. THIS APPLIES REGARDLESS OF THE CAUSE OF THE SOOTING.
2
TWZ065
TWZ075
TWZ100
TWZ090
TWZ125
TWZ150
TWZ120
TWZ175
TWZ200
Boiler Model
2.75
3.00
3.50
4.25
4.75
Tankless Heater Ratin
g
(
Gal/min
)
3.25
3.25
3.75
4.00
"A" "B" "C"
TWZ065 3 0.65 80000 70000 86.1 16.0 16 1/2 8 5/16 6
TWZ075 3 0.75 91000 79000 85.8 16.0 16 1/2 8 5/16 6
TWZ100 3 1.00 120000 104000 84.3 16.0 16 1/2 8 5/16 6
TWZ090 4 0.90 111000 97000 86.0 20.0 21 1/2 10 13/16 7
TWZ125 4 1.25 152000 132000 84.9 20.0 21 1/2 10 13/16 7
TWZ150 4 1.50 179000 156000 83.8 20.0 21 1/2 10 13/16 7
TWZ120 5 1.20 147000 128000 86.0 24.0 26 1/2 13 5/16 8
TWZ175 5 1.75 210000 183000 83.5 24.0 26 1/2 13 5/16 8
TWZ200 5 2.00 238000 207000 83.3 24.0 26 1/2 13 5/16 8
I=B=R Net
Ratin
g
(
Btu/hr
)
A
FUE
(
%
)
A
pprox. Water
Content
(
Gal
)
Dimensions (inches)
Boiler Model
Number of
Sections
Burner
Input
(
Gal/hr
)
DOE Heating
Capacity
(
Btu/hr
)