Before Installing - Crown Boiler TWZ Series Installation Instructions Manual

TABLE 2.2: OPTIONAL TANKLESS HEATER RATINGS
Boiler Model
TWZ065
TWZ075
TWZ100
TWZ090
TWZ125
TWZ150
TWZ120
TWZ175
TWZ200
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.
3) Make sure that the boiler is correctly sized:
•
For heating systems employing convection radiation (baseboard or radiators) use an industry accepted
sizing method such as the I=B=R Guide RHH published by the Air-Conditioning, Heating and Refrigeration
Institute (AHRI).
•
For new radiant heating systems refer to the radiant tubing manufacturer's boiler sizing guidelines.
•
For systems including a Crown Mega-Stor indirect water heater, size the boiler to have either the Heating
Capacity required for the Mega-Stor or the I=B=R Net Rating required for the heating system, whichever results
in the larger boiler.
•
For systems that incorporate other indirect water heaters, refer to the indirect water heater manufacturer's
instructions for boiler output requirements.
4) In some cases, boilers installed at altitudes above 2000ft may require a different burner configuration from that at sea
level. Consult the local Crown representative for more information.
Fuel oil used with this boiler must conform to ASTM D396. The ASTM D396 standard sets a
5% limit on biodiesel concentration, requires that the biodiesel feedstock comply with ASTM
D6751, and also specifies the procedure that must be used to blend the biodiesel feedstock
with the #2 fuel oil. Attempts to use biodiesel blends not meeting all ASTM D396 requirements
may result in unreliable operation or severe property damage.
Tankless Heater Rating
(Gal/min)
2.75
3.00
3.25
3.25
3.75
4.00
3.50
4.25
4.75
III Before Installing
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.
CAUTION
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