Bradford-White Corp Copper Brute II Hydronic Boiler Manual De Usuario

Page 14

  

 

SIZE

 

  

 500  43 1.7 34 1.1 28 0.9 24 0.7
 750  64 3.3 51 2.3 43 1.7 36 1.2
 1000  85 5.0 68 3.6 57 3.1 49 2.2
 1250  106 8.1 85 6.1 71 4.7 61 3.4
 1500  128 

 1750  N/R 

 2000  N/R N/R 136 12.5 113 10.4  97  8.3

 

Notes: gpm = gallons per minute, lpm = liters per minute, 
H/L = headloss, ft = headloss in feet, m = headloss in meters.

Maximum temperature rise is 35°F (19°C), as shown. 

Headloss is for boiler’s heat exchanger only. 

N/R = not recommended.

NOTE: This appliance must be installed in a closed 

pressure system with a minimum of 12 psi (82.7kPa) 

static pressure at the boiler.

Hot water piping should be supported by suitable 

hangers or floor stands. Do not support piping with 

this appliance. 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. Maintain 1" clearance 

to combustibles for 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, 

a diaphragm-type expansion tank, and a hydronic 

flow check in the system supply loop. Minimum fill 

pressure must be 12psig (82.7kPa). Install shutoff 

valves where required by code.

Suggested piping diagrams are shown in 

Figures 

4 through 8.

 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; you must provide 
a location for the additional sensor shipped with 

the Copper Brute II. This sensor may be strapped 

onto pipe from 1" to 4" diameter, or inserted into an 

immersion well.

1.  Connect the cold water supply to the inlet 

connection of an automatic fill valve.

2.  Install a suitable back flow preventer between the 

automatic fill valve and the cold water supply.

3.  Install shut off valves where required.

The boiler, when used in connection with a 

refrigeration system, must be installed so the chilled 

medium is piped in parallel with the boiler with 
appropriate valves to prevent the chilled medium from 

entering the boiler.

The boiler piping system of a hot water heating 

boiler connected to heating coils located in air 

handling appliances where they may be exposed to 

refrigerated air circulation must be equipped with flow 
control 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.

A hydronic heating (closed loop) application 

re-circulates the same fluid in the piping system. As a 

result, no new minerals or oxygen is introduced into 

the system. To ensure a proper operating temperature 

leading to long boiler life, a flow rate has been 

established based on the fluid temperature rise for this 

specific size boiler.

Pump-mounted boilers can be ordered for use in 

primary secondary piping systems. The pumps used 

are sized for the headloss through the heater, plus 30 

feet (9.1m) of full-sized piping (same size as boiler 

outlet) and a normal number of fittings. 

Table 8

 specifies water flow rates for boilers, 

which will enable the user to size a pump. The 
headloss shown is for the heater only, and the user 
will need to add the headloss of the system piping to 

properly size the pump.

The minimum inlet water temperature for the 

Copper Brute II is 120°F (49°C) to avoid condensing 

on the copper coils.

Boiler installations are not recommended in 

areas where the danger of freezing exists unless proper