Bradford White BWCH Operations Instructions download pdf (Page 41)

Page 41

COPPER BRUTE II (500 - 2000)

Caution

If the tank temperature control is set too high, a

potential for hot water scalding may exist.

Mode 2: Primary secondary piping.

Install a “supply sensor” in the primary loop

using the Bradford White part number R2014800

sensor (included with every Copper Brute II unit).

Connect the sensor to the “S C2” and “SUP S”

terminals.

You must provide an indication of the system’s

heat demand by removing the jumper across the

“ComD” and “HtD” terminals on the eld wiring

panel and connecting a zone valve or zone pump end

switch, thermostat, aquastat or other contact closure to

these terminals. If the “ComD” and “HtD” terminals

are left jumpered, the control will always see a heat

demand and remain in “Dem” mode, with the boiler

pump running continuously. See Section 5.2 for more

information.

A secondary aquastat, such as for a separate heat

exchanger for DHW, can be connected to the “Set D”

and “Com D” terminals. A call for heat from these

controls will start the boiler pump and cause the boiler

to re.

If the boiler is not a pump mounted model, a

24VAC pump contactor may be connected to the

“PMP” terminals to control a eld installed pump.

Program the temperature control to use Mode 2.

The

AUTO/MAN switch must be in the AUTO position in

this mode.

Mode 4:

Hydronic outdoor reset system

without primary / secondary piping.

Bradford White strongly suggests the use of

primary secondary piping with the Copper Brute II

boiler. This piping style best ensures that the Copper

Brute II will have proper water ow. However, non-

primary secondary methods can be used successfully,

so this section has been included.

Install the outdoor reset sensor, Bradford White

part number R2014000, and connect the leads to the

“OD S” and “S C2” terminals.

You must provide an indication of the system’s

heat demand by removing the jumper across the

“ComD” and “HtD” terminals on the eld wiring

panel and connecting a zone valve or zone pump end

switch, thermostat, aquastat or other contact closure to

these terminals. If the “ComD” and “HtD” terminals

are left jumpered, the control will always see a heat

demand and remain in “Dem” mode, with the boiler

pump running continuously. See Section 5.2 for more

information.

Reset Override: An additional thermostat or aquastat

may be connected to the “Set D” and “Com D”

terminals. A call for heat from either of these controls

will start the boiler’s pump and cause the boiler to re.

If the boiler is not a pump mounted model, a

24VAC pump contactor may be connected to the

“PMP” terminals to control a eld installed pump.

Program the temperature control to use Mode 4.

The

AUTO/MAN switch must be in the AUTO position in

this mode.

Mode 5:

Primary secondary piping with

outdoor reset.

Install the outdoor reset sensor, Bradford White

part number R2014000, and connect the leads to

the “OD S” and “S C2” terminals. Install a “supply

sensor” in the primary loop using the Bradford White

part number R2014800 sensor (included with every

Copper Brute II unit). Connect the sensor to the “S

C2” and “SUP S” terminals.

You must provide an indication of the system’s

heat demand by removing the jumper across the

“ComD” and “HtD” terminals on the eld wiring

panel and connecting a zone valve or zone pump end

switch, thermostat, aquastat or other contact closure to

these terminals. If the “ComD” and “HtD” terminals

are left jumpered, the control will always see a heat

demand and remain in “Dem” mode, with the boiler

pump running continuously. See Section 5.2 for more

information.

A secondary aquastat, such as for a separate heat

exchanger for DHW, can be connected to the “Set D”

and “Com D” terminals. A call for heat from these

controls will start the boiler pump and cause the boiler

to re.

If the boiler is not a pump mounted model, a

24VAC pump contactor may be connected to the

“PMP” terminals to control a eld installed pump.

Program the temperature control to use Mode 5.

The

AUTO/MAN switch must be in the AUTO position in

this mode.

Mode 6:

Boiler with external staging control

(multiple boiler control, building

automation system, energy

management system, etc.)

Leave the jumper installed between “Ht D” and

“Com D” terminals. There are terminals on the eld

wiring panel that must be wired per the instructions in

Section 5.3 of this manual. Other wiring methods

may be unsafe. The wiring in Section 5.3 of this

manual must be used.

The

AUTO/MAN switch is located on the circuit

board in the slide-out control panel on the front of the

Copper Brute II. This switch is placed in the manual

position

(MAN) when an external control is controlling

the Copper Brute II stages.

Program the temperature control to use Mode

6. Mode 6 tells the Copper Brute II control that an

external staging control is being used.

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Bradford White BWCH Operations Instructions Page 41

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