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Bradford White
Page 12
Copper Brute II
Page 13
Warning
Do not use open ame to check for leaks. An open
ame could lead to explosion, which could result in
property damage, serious injury or death.
NOTE: The Copper Brute II appliance and all other
gas appliances sharing the gas supply line must be
ring at maximum capacity to properly measure the
inlet supply pressure. The pressure can be measured
at the supply pressure port on the gas valve. Low
gas pressure could be an indication of an undersized
gas meter, undersized gas supply lines and/or an
obstructed gas supply line.
SECTION 4.
Water Connections —
Copper Brute II Water Heater
4.1 Water System Piping —
Water Heater
Hot water piping should be supported by suitable
hangers or oor stands. Do not support piping with
this heater. Due to expansion and contraction of
copper pipe, consideration should be given to the type
of hangers used. Rigid hangers may transmit noise
through the system resulting from the piping sliding in
the hangers. It is recommended that padding be used
when rigid hangers are installed.
The heater can be used with several different
types of readily available storage tanks. A pump draws
water from the storage tank and pumps the water
through the heater and back into the tank. Pump-
mounted units have a circulating pump built into the
water heater. The pumps used are sized for the head
loss through the heater, plus 30 feet (9.1m) of full-
sized piping (same size as heater outlet) and a normal
number of ttings. Pumps used on pump-mounted unit
are sized for soft/normal or hard water, so make sure
a pump-mounted unit matches the water quality of the
installation.
Pipe the outlet from the heater’s relief valve
such that any discharge from the relief valve will be
conducted to a suitable place for disposal when relief
occurs. Do not reduce line size or install any valves in
this line. The line must be installed to allow complete
drainage of both the valve and the line.
Suggested piping diagrams are shown in Figures
4, 5, 6 and 7. These diagrams are meant only as a
guide. Components required by local codes must be
properly installed.
Note the recommended location of the
temperature sensor on the diagrams. The heater is
shipped with an additional sensor that can be used for
more full-featured domestic water heating control. To
get these features, you must provide a location for the
additional sensor. It can be strapped to a pipe from 1"
to 4" diameter, or inserted into a tank immersion well.
The minimum inlet water temperature for the
Copper Brute II is 120°F (49°C) to avoid condensing
on the copper coils.
4.2 Hot Water Supply Piping —
Water Heater
Follow the tank manufacturer’s guidelines for
completion of the hot water system connections.
NOTE: A listed temperature and pressure relief
valve listed as complying with the Standard for
Relief Valves and Automatic Gas Shutoff Devices
for Hot Water Supply Systems (ANSI Z21.22 /
CSA 4.4) of suitable discharge capacity must be
installed in the separate storage tank system.
If the water heater is installed in a closed
water supply system, such as one having a backow
preventer in the cold water supply line, the relief valve
may discharge periodically, due to thermal expansion.
Means (such as a properly-sized expansion tank) shall
be provided to control thermal expansion. Contact the
water supplier or local plumbing inspector on how to
control this situation.
4.3 Water Flow Requirements —
Water Heater
In a water heating application (an open system),
new water is constantly being introduced. With the
new water comes a fresh supply of minerals that can
be deposited on the unit’s heat exchanger. This is
commonly known as scaling. The amount of minerals
will depend upon the hardness of the water. Water can
also be aggressive, and can erode metals, including
copper, if the water is moved too quickly. The water
ow requirements for the Copper Brute II water heater
are based upon the hardness of the water. The water
ow is kept high enough to prevent scaling, but low
enough to prevent tube erosion. For extremely soft or
hard water, cupro-nickel tubes are available. Contact a
Bradford White representative if you have questions or
concerns about water quality.
Pump-mounted water heaters can be ordered
with standard pumps for soft or normal water or with
pumps for hard water. The pumps used are sized for
the head loss through the heater, plus 30 feet (9.1m)
of full-sized piping (same size as heater outlet) and a
normal number of ttings.
Table 8 species water ow rates for water
heaters, which will enable the user to size a pump. The
head loss shown is for the heater only, and the user
will need to add the head loss of the piping system to
properly size the pump.