Crown Boiler BB100H - Manual (Page 10)

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Figures 5.0 - 5.8 show basic Bimini Buddy Piping piping for all types of Bimini Buddies. Please note the following:
If the Bimini Buddy cannot be installed above the boiler as shown in Figure 5.0 (so that there are no down-turns 1)
in the supply piping), install a screw driver vent in the supply piping for initial purging as shown in Figure 5.1.
Minimize the amount of pipe and fittings between the boiler and Bimini Buddy, and between the BB100I and 2)
the indirect water heater:
Flow checks are not required in this piping and will only add unnecessary pressure drop. •
If isolation valves are installed on the system side of the hydraulic separator, there is little reason to also •
include them in the boiler piping. If isolation valves are installed in the boiler piping, use only full port ball
or gate valves.
If at all possible, avoid cutting the factory supplied system stubs (connections) on the hydraulic separator. 3)
Recommended fill valve connection is between the hydraulic separator and expansion tank as shown in Figure 4)
5.0.
Flush the Bimini Buddy and system before connecting the boiler 5)
The hydraulic separator in the Bimini Buddy is designed to assure that the proper flow rate is maintained through the
boiler regardless of the flow rate present in the heating system. Even so, the piping between the boiler and Bimini Buddy
(and between the BB100I and the indirect water heater) must be properly sized for the boiler and Bimini Buddy to work
properly. Size this piping as follows:
All piping between the boiler and the Bimini Buddy (and between the Bimini Buddy and the indirect water 1)
heater on the BB100I) is 1” nominal pipe size. For BB100I installations, this is true even when the indirect
water heater itself has different connection sizes.
Refer to the appropriate Figure 5.6, 5.7, or 5.8 for the type of Bimini Buddy being installed. Determine the 2)
length of all straight pipe on the planned installation that is shaded in the drawing.
Count the number of elbows that will be used in the planned installation in the piping that is shaded in the 3)
illustration. Multiply the number of 1” elbows that will be used by 2.75ft per elbow. The result is the total
equivalent length of all elbows that will be used. Note: the equivalent length of the Tee, Cross, and Reducers
provided with the boiler do not need to be considered. Likewise, Unions, runs of Tees, and Full Port Ball or
Gate Valves can be treated as straight pipe.
CAUTION
Install Bimini buddy and boiler so that the gas ignition system components are protected from water •
(dripping, spraying, rain, etc) during appliance operation and service (circulator replacement, etc).
Install the boiler relief valve, and other boiler trim, as described in the boiler’s installation manual. •
Operation of a boiler in a system having frequent additions of make-up water can cause severe heat •
exchanger damage.
Do not use toxic additives, such as automotive antifreeze, in a hydronic system. •
Before connecting boiler, make sure that the system is free of sediment, flux and any residual boiler water •
additives. Flush the system if necessary to ensure that these contaminates are removed.
Do not use antifreeze or other chemicals that are not explicitly permitted by the boiler installation •
manual. See the boiler installation manual for for additonal important information on water chemistry
requirements.
V. Boiler and System Piping