tekmar 284 Boiler Control - Manual (Page 40)

© 2014 284_D - 08/14 40 of 60 A Watts Water Technologies Company
Setup Menu (4 of 6)
Item Field Range Description
OFF or ON
Default: OFF
Access: ADV
FIXED LAST
Selects whether or not the last boiler is to be excluded from the rotation sequence.
If set to ON, boiler 4 is always the last to fire.
This item is only available if boiler 4 is enabled (Boiler Enable = AUTO) & all
available boilers are either condensing or non-condensing.
AUTO, 5 to 30 min
Default: AUTO
Access: ADV
HEATING CYCLES
The cycle length to which all tN4 devices will synchronize.
This item is only available when Application Mode is set to RSET & a tN4 device
is present.
OFF or ON
Default: OFF
Access: ADV
INDIRECT DHW MODE
Selects whether indirect DHW heating is active or not.
This item is only available when Application Mode is set to RSET, SETP or
EMS.
NEAR or Boil
Default: Boil
Access: ADV
INDIRECT DHW LOCATION
Selects the location of the indirect DHW tank.
NEAR = Near boiler piping supplied by boiler 4.
Boil = Boiler system piping supplied by boiler plant.
This item is only available when Application Mode is set to RSET, SETP or EMS
& Indirect DHW Mode is set to ON. NEAR is only available when Plant Flow is
set to PUMP.
OFF or ON
Default: OFF
Access: ADV
INDIRECT DHW SENSOR
Selects if a DHW Sensor is to be used for indirect DHW heating.
This item is only available when Application Mode is set to RSET, SETP or EMS
& Indirect DHW Mode is set to ON.
70 to 190°F
(21.0 to 88.0°C)
Default: 140°F (60.0°C)
Access: ADV
INDIRECT DHW SETPOINT OCCUPIED
The temperature of the indirect DHW tank during the occupied periods.
This item is only available when Application Mode is set to RSET, SETP or EMS,
Indirect DHW Mode is set to ON & Indirect DHW Sensor is set to ON.
OFF, 70 to 190°F
(21.0 to 88.0°C)
Default: OFF
Access: ADV
INDIRECT DHW SETPOINT UNOCCUPIED
The temperature of the indirect DHW tank during the unoccupied periods. If
operation is not desired during the unoccupied periods, select OFF.
This item is only available when Application Mode is set to RSET, SETP or EMS,
Indirect DHW Mode is set to ON, Indirect DHW Sensor is set to ON & the Setback
/ Off switch is set to Setback.
1 to 42°F
(0.5 to 23.5°C)
Default: 6°F (3.0°C)
Access: ADV
INDIRECT DHW DIFFERENTIAL
The temperature differential of the indirect DHW tank from the IDHW SETPOINT
settings.
This item is only available when Application Mode is set to RSET, SETP or EMS,
Indirect DHW Mode is set to ON & Indirect DHW Sensor is set to ON.
100 to 220°F
(38.0 to 104.0°C)
Default: 180°F (82.0°C)
Access: ADV
INDIRECT DHW EXCHANGE OCCUPIED
The boiler target temperature for the indirect DHW heat exchanger during the
occupied periods.
This item is only available when Application Mode is set to RSET, SETP or EMS,
Indirect DHW Mode is set to ON & Indirect DHW Sensor is set to OFF.
OFF, 100 to 220°F
(OFF, 38.0 to 104.0°C)
Default: OFF
Access: ADV
INDIRECT DHW EXCHANGE UNOCCUPIED
The boiler target temperature for the indirect DHW heat exchanger during the
unoccupied periods. If operation is not desired during the unoccupied periods,
select OFF.
This item is only available when Application Mode is set to RSET, SETP or EMS,
Indirect DHW Mode is set to ON, Indirect DHW Sensor is set to OFF & the Setback
/ Off switch is set to Setback.