About The "Time Of Day" Function; J Install The System Sensor And Adjust The Setpoint; Warm Weather Shutdown - Bradford White Brute BNTH1000 Installation And Operation Instructions Manual

Page 66
Table 16 – Base Load Settings
Number
of boilers
Installed
1
2
3
4

About the "Time of Day" Function

If the "time of day" function is enabled, the control
system can be set to maintain different temperatures
for central heat and domestic hot water (other than
the normal setpoints) in the system at certain times
of the day. Normally this function is used to switch
to lower temperatures at night, when the central
heating or domestic hot water demand is reduced.
When the controller acting as the Lead/Lag Master
receives a time of day input, the controller shifts to
the special setpoints entered for central heat and
domestic hot water.
The input for the Time of Day function must be wired
to pins 2 and 3 on connector J10.
Fig. 90 – Connections for "Time of Day" Function
Base load min.
65%
50%
30%
30%
Pins 2 and 3 on
connector J10
Job J - Install the System Sensor and
Adjust the Setpoint
(This is a Lead/Lag function – do this once for the whole
Lead/Lag system. Make the connections to the controller
set up as the Lead/Lag Master – usually the Primary
controller on Boiler 1.)
1. Install the System sensor at the location
shown in Fig. 91. Connect the System sensor
to the System terminals on the controller
acting as the Lead/Lag Master (usually the
Primary controller on Boiler 1.) Use terminals
3 and 4 on TB6.
2. Adjust the Lead/Lag Central Heat Setpoint
to the desired temperature to be used by the
system.
How to get there – Adjust CH Setpoint
Home Page <Press View Lead Lag button> Lead
Lag Screen <Press Lead Lag Master button> Lead
Lag Screen <Press Configure button> Lead Lag
Master Configuration Screen
Line 2 = CH Setpoint
Fig. 91 – Mounting Location for System Sensor
Job K - Set the Lead Lag Outdoor Reset and

Warm Weather Shutdown

(This is a Lead/Lag function – do this once for the whole
Lead/Lag system. Use the controller set up as the Lead/
Lag Master – usually the Primary controller on Boiler 1.)
For more information on the outdoor reset function,
see the explanation which follows.
1. Install the outdoor air temperature sensor
and make the connections to the outdoor air
sensor terminals on the controller acting as
the Lead/Lag Master (usually the Primary
controller on Boiler 1.) Use terminals 1 and 2
B W
RADFORD HITE