2
nd
Stage:
Jumper on pins designated for delay required for all second stages of devices. This stage is activated after
first stage of a device is actively running and timer has been satisfied. (Light designating active for that device.)
Cooling:
“
O
”
call from the Equipment connected sends signal to Rotational Board (BDCB
-
RC) XO terminal. The Cooling
light will be lit designating it is active for all devices.
See page 4 for location of the Cooling Light on the Rotational
Board (BDCB
-
RC)
Scranton, IA 51462
Phone (712) 652
-
3424
www.bdmfginc.com
11
FUNCTIONALITY OF ROTATIONAL CONTROLLER
Once the Rotational Board (BDCB
-
RC) is powered on, the green power light in the upper left hand side of the board
should be lit up.
See page 4 for the location of the rotational board power light.
As previously mentioned, the demand signal from the equipment connected to Rotational Board (BDCB
-
RC) requests
demand for hot/cold water based on its current controls method. The demand signal terminal closes sending the power it
receives from the Rotational Board (BDCB
-
RC) XR terminal back to the Rotational Board (BDCB
-
RC) XY terminal.
This will start a water device. The water device that is started depends on where it left off in its rotational control
program. The device that is on has a light designating that it is actively running. This then starts the Rotational Controls
functionality.
The control will then rotate which water device comes on first on a demand call. It does this by rotating to the next
device in the connection series when demand goes away. Ex: 1,2,3,4; 2,3,4,1; 3,4,1,2; 4,1,2,3.
Once a device has started two things happen:
1.
Timer begins for the second stage of that device.
2.
Built in timer for next water device to operate begins. This is a two minute timer. Each time before any device,
except the original device; can operate this timer is activated.
Once this timer is satisfied it then sends power to the next temperature controller and based on its set points can turn on
the next water device. The green and red LED on the temperature controller to the right of the LCD screen must be lit for
the next water device to be activated. This happens until all units are running or demand is meet.
XY,XO,XR
TERMINALS
B&D ROTATIONAL BOARD (BDCB
-
RC)
See below for the 1st and 2nd stage lighting identification of the Rotational Board (BDCB
-
RC)
1st
STAGE
LIGHT
2nd
STAGE
LIGHT
EQUIPMENT
#4
1st
STAGE
LIGHT
2nd
STAGE
LIGHT
EQUIPMENT
#3
1st
STAGE
LIGHT
2nd
STAGE
LIGHT
EQUIPMENT
#2
1st
STAGE
LIGHT
2nd
STAGE
LIGHT
EQUIPMENT
#1