BFit BFITW 1000, Инструкция по установке, эксплуатации и обслуживанию

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Isolation valves are useful for servicing and stopping
water flow in the case of failure. Full port ball valves
are required.
9. Mixing Valve/Anti-scald Valve (Recommended)
A mixing valve is recommended when storing water
at scalding hot temperatures.
10. Recirculation Filter (Recommended)
A Recirculation filter can capture suspended solids
in the system and help prevent the effects of
erosion corrosion.
D. Scalding
This water heater can supply water at scalding
temperatures to faucets and other fixtures in the
system. Mixing valves are recommended to maintain
the supply water at safe temperatures.
1. Maintaining the storage tank above 140 0 F and
using a mixing valve can increase the amount of
hot water available and help prevent the growth
of water borne bacteria like Legionella.
a. Mixing valves can be installed at the outlet of
storage tank or at other zones or fixtures in the
system.
2. When appliances such as dishwashers or clothes
washers are used in a domestic hot water system
that require increased temperatures, two hot water
supply's can be set up as shown in Figure 15.
3. Scalding can occur at temperatures above 125 0 F.
Young Children, disabled, and elderly are most at
risk of hot water scalding.
NOTICE NOTICE
The BFIT heat exchanger is made from stainless
steel tubular double coil having relatively nar -
row waterways. Once filled with water, it will be
subject to the effects of corrosion. Failure to take
the following precautions to minimize corrosion,
and overheating could result in severe product
damage.
Before connecting the appliance, insure the system
is free of impurities, grease, sediment, construc -
tion dust, sand copper dust, and flux. Flush the
system thoroughly and repeatedly, if needed.
Scale deposit is made up of lime scale contained
in most distributed water and settles over the
warmest surfaces of the heat exchanger causing
subsequent overheating and eventual failure.
Scale can form from high water hardness and slow
water velocities. Failure to maintain the recom -
mended water hardness and flow rate will result
in a buildup of scale inside the heat exchanger.
IX . Water Piping
(continued)
DANGER DANGER
HOT
BURN
• Water temperatures over 125 0 F can cause
severe burns instantly or death from scalds.
• Children, disabled, and elderly are at highest
risk of scalding.
• Feel water before bathing or showering.
• For domestic hot water supply, adjust the high
limit control on the appliance or use tempering
(mixing) valves to limit the supply temperature
below 125 0 F.
!
Temperature ( ° F) Time
120 More than 5 minutes
125 1-1/2 to 2 minutes
130 About 30 seconds
135 About 10 seconds
140 Less than 5 seconds
145 Less than 3 seconds
150 About 1-1/2 seconds
155 About 1 second
Table 21: Approximate Time for Scalding