Section 6 - Water Connections; Connections; Boiler Cold Water Make-Up; Boiler Freeze Protection - Bradford White Brute MagnaTech BMGV1600 Installation And Operation Instructions Manual

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Section 6 -
WATER CONNECTIONS
BOILERS
6.1 System Piping:
Hot Supply Connections
Note -This appliance must be installed in a closed
pressure system with a minimum of 12 psi (82.7
kPa) static pressure at the boiler.
The hot water piping should be supported by
piping with this appliance. The hangers used should
allow for expansion and contraction of pipe. Rigid
hangers may transmit noise through the system
resulting from the piping sliding in the hangers.
We recommend that padding be used when rigid
hangers are installed. Maintain 1" (2.5 cm) clearance
to combustibles for all hot water pipes.
Pipe the discharge of the relief valve (full size) to a
drain or in a manner to prevent injury in the event of
pressure relief. Install an air purger, an air vent, an
system supply loop, and any other devices required
be 12 psig (82.7 kPa). Install shutoff valves where
required by code.
Suggested piping diagrams are shown in Figure 9
through Figure 12. These diagrams are meant only
as guides. Components required by local codes
must be properly installed.
water temperatures. Therefore, to get the best low
return temperature with multiple boilers, pipe as
shown in Figure 11 and Figure 12.
6.2 Cold Water Make-Up
1. Connect the cold water supply to the inlet
supply.
3. Install shut off valves where required.
In some installations, a hot water heating boiler is
connected to heating coils located in an air handling
appliance where the coils may be exposed to
refrigerated air circulation. In these cases, the boiler
valves or other automatic means to prevent gravity
circulation of the boiler water during the cooling
cycle.
A boiler installed above radiation level, or as
required by the authority having jurisdiction, must be
provided with a low water cutoff device either as a
part of the boiler or at the time of boiler installation.
6.3 Freeze Protection
Unit may be installed indoors or outdoors. If installing
outdoors in a location that may experience freezing
temperatures, precautions must be taken to prevent
water in the heat exchanger and condensate inside
and outside of the boiler from freezing. Damage due
to freezing water or condensate is not covered by the
warranty.
If installed indoors, and there is an event such as a
power outage, interruption of gas supply, failure of
system components, activation of safety devices,
a boiler is subjected to freezing conditions, and
not able to circulate, there is a risk of freezing
in the boiler or in the pipes in the system. When
water freezes, it expands. This may result in bursting
of pipes, or damage to the boiler, and this could
Do not use automotive antifreeze. To help prevent
freezing, The manufacturer recommends the use
of inhibited glycol concentrations between 20%
and 35% glycol. Typically, this concentration will
serve as burst protection for temperatures down
to approximately -5°F (-20°C). If temperatures
are expected to be lower than -5°F (-20°C), glycol
concentrations up to 50% can be used. When
concentrations greater than 35% are used, water
WARNING
Glycol must not be used in domestic hot
water applications. Refer to Section 7 for
instructions on freeze protection for units
(domestic hot water).
Any time