Crown Boiler BB100H - Manual (Page 16)

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Connect the domestic hot water piping as shown in Figure 6.0 for the BB100C. The components in this system and
their functions are as follows:
Mixing Valve/Anti-scald Devices 1) (Required) - A thermostatic mixing valve must be field supplied for the
BB100C. Where this mixing valve is field supplied, select a model that has an adjustment range which allows
it to be set below 120F (Honeywell AM-1 or equivalent). If required, install additional anti-scald protection
devices in accordance with local codes. In the absence of any local Codes, install such devices as required by
the Uniform Plumbing Code (IAPMO UPC).
Flow Restrictor (Recommended) 2) - If domestic hot water is drawn from the Bimini Buddy at a rate in excess of
the rating in Table 2.4, the temperature of the hot water may be too low to be of use. The use of a flow restrictor
will prevent this problem by limiting the rate at which water can pass through the heat exchanger. If a restrictor
is used, select one having a rating in GPM approximately equal to that shown in Table 2.4.
Pressure Relief Valve (Required) 3) - Limits the pressure in the domestic hot water piping. Use a valve designed
for DHW service, such as the Watts #3L or #53L. Note that this is a pressure relief valve, not a T&P valve.
Select a valve with a pressure setting less than or equal to 150 psi. Pipe the discharge to a safe location using
piping the same size as the discharge connection on the valve.
Hose Bib Valves (Recommended) 4) - These valves permit the plate heat exchanger be periodically “back flushed”
to remove sediment. The BB100M is equipped with plugs which can be removed and replaced with hose bib
valves when the heat exchanger is cleaned.
Globe or Ball Valve (Recommended) 5) - Used to aid in back flushing the heat exchanger and to isolate the DHW
piping if it must be serviced. In addition, the upstream valve may be used to limit the DHW flow if necessary.
WARNING
Like all domestic water heaters, the BB100C is capable of generating water that is hot enough to cause
injury or death due to scalding. To minimize the risk of scalding:
Set domestic hot water (DHW) temperature as low as possible (see the Start-up Section of this •
manual for information on setting domestic water temperature.
Feel water before showering or bathing. •
If anti-scald or anti-chill protection is required, use devices specifically designed for such service. •
Install and maintain these devices in accordance with the manufacturer’s instructions.
CAUTION
If the BB100C is connected to a water supply having a hardness in excess of 200PPM, scale may
prematurely form in the plate heat exchanger, significantly shortening its life. If necessary, soften the
water upstream of the cold water connection to the Bimini Buddy.
VI. Domestic Water Piping (BB100C)