Bradford-White Corp BWCV Internet Version for Reference Only, “Parallel Piping”, Programming

Internet Version for Reference Only

Copper Brute II Page 21

you have. You must determine the type of piping the system has, the Mode the temperature control will operate in, and the various settings for that mode.

6.2.1 System Piping

“Primary Secondary Piping”

In the context of these instructions, “primary secondary piping” means the heater provides heat to a plumbing loop that has, in turn, one or more plumbing loops connected to it, which provide heat to radiant tubing, radiators, DHW heat exchangers, etc. This plumbing loop is the “primary loop.”

In primary secondary piping modes, the temperature control monitors the primary loop temperature. The extra sensor that is shipped loose with heater is installed in the primary loop. The temperature control fires the heater stages to provide the “target temperature” at that sensor. Over time, the temperature control will learn the system curve and adjust the firing of the stages to meet the demand in the most efficient way.

For complex systems, with variable speed injection circulators, multiple temperature zones, etc., you may need to consult with a qualified engineer or Bradford White.

“Parallel Piping”

The term “parallel piping” means the heater is supplying heat directly to one or more storage tanks, radiators, radiant zones, etc., plumbed in series. In these systems, the target temperature is the heater’s outlet temperature. An exception is for domestic hot water systems using mode 3, where the extra sensor is placed in the tank.

6.2.2 Choosing the Mode

There are six modes of operation for the heater's temperature control. The loose sensor must be installed and connected prior to programming the temperature control, as it provides sensing the “target” temperature. The location of the sensor is dependent on the type of piping used.

Modes 1 through 5 are the automatic modes, requiring the diagnostic panel’s AUTO/MAN switch (located on the slide-out control drawer) to remain in the default “AUTO” position. These modes enable the temperature control to fire the heater’s stages to meet the demand of the system. In these modes, the heater's temperature control continuously samples the inlet, outlet and target temperatures.

Mode 6 is the “Manual” mode, and the AUTO/ MAN switch must be moved to the “MAN” position. An external control, such as a building automation system or multiple heater control, just be wired to the field wiring panel in order to fire the heater, bypassing the temperature control. (See Section 5.3 for important information about external staging controls and building automation systems.)

Application	Mode	System
	Setting	Sensors Used
• Parallel piping (non-
primary/secondary)
hydronic system	1	• None
• DHW with or without
a tank aquastat
• Primary/secondary
hydronic system	2	• Bradford White System
(preferred by		Sensor (shipped with
Bradford White)		each Copper Brute II)
• No outdoor reset
• Parallel piping (non-
primary/secondary)
hydronic system	3	• Bradford White System
• DHW		Sensor (shipped with
• Advanced control		each Copper Brute II)
capability
• No outdoor reset
• Parallel piping (non-		• Bradford White outdoor
primary/secondary)		reset sensor (optional
hydronic system	4	part #R2014000)
• Advanced control
capability
• Outdoor reset
• Primary/secondary		• Bradford White System
hydronic system	5	Sensor (shipped with
(preferred by		each Copper Brute II)
Bradford White)
• Outdoor reset		•Bradford White outdoor
		reset sensor (optional
		part # R2014000)
• Building automation
control
• Multiple boiler system	6	• None
control
• Energy management
system
• Other external control

Table 9. Modes and Sensors for Applications.

Table 9 contains information to identify the mode you should use for your system.

6.2.3 Programming

Before programming, you must determine the type of piping you have, the mode you will use, and install the extra sensor if required for that mode. See sections 6.2.1 and 6.2.2 for more information, or contact the factory.

There are three black programming buttons on the Temperature Control (see Figures 10 and 11). Press and hold all three programming buttons until the word “ADJUST” appears in the upper right corner of the LCD display (it replaces the word “VIEW”).

Pressing “Item” cycles you through the items you need to program. “Up Arrow” increases the value of that item, while “Down Arrow” decreases it. “ADJUST” mode exits if you don’t press a button for 20 seconds. To return to “ADJUST” mode, simply press and hold the three buttons again.