Circulation Pumps - Lochinvar ECOKNIGHT EKW46CE Installation Manual

21.7.6
SET POINT AT MAXIMUM VOLTS
When programmed for BMS control through the 0 - 10V BMS input or through ModBus/BACnet and the BMS Type is
programmed as SETPOINT, the set point represented by the Volts at Maximum parameter is set by the Set Point at Maximum
Volts parameter. The minimum value is the Set Point at Minimum Volts setting and the maximum is 88°C. The default value is
82°C.
21.7.7
VOLTS AT MINIMUM
When programmed for BMS control through the 0 -10V BMS input or through ModBus/BACnet, the Volts at Minimum parameter
should be set to the minimum voltage signal sent to the SMART SYSTEM control. The range of this parameter is 0.0V to the
Volts at Maximum value. The default setting is 2.0V.
21.7.8
VOLTS AT MAXIMUM
When programmed for BMS control through the 0 -10V BMS input or through ModBus/BACnet, the Volts at Maximum parameter
should be set to the maximum voltage signal sent to the SMART SYSTEM control. The range of this parameter is the Volts at
Minimum value to 10.0V. The default value is 10.0V.
21.7.9
BMS THERMOSTAT INPUT
With the BMS Thermostat Input parameter set to ACTIVE, the water heater will be enabled by closing the thermostat connection
across terminals 15-16 see 15.2.1 section 3 for further details. When set to INACTIVE, the water heater will be enabled by the
voltage level on the 0 - 10V input (in the case of 0 - 10V BMS control), or the 0 - 10V input value received through BACnet or
ModBus. The default value is INACTIVE.
21.7.10
ON VOLTS
When programmed for BMS control through the 0 -10V BMS input or through ModBus/BACnet and the BMS Thermostat
Input is set to INACTIVE, the On Volts parameter determines the 0 - 10V BMS input voltage at which the water heater is
enabled. The minimum value is 0.5V and the maximum is 10.0V. The default value is 2.0V.
21.7.11
OFF DIFFERENTIAL VOLTS
When programmed for BMS control through the 0 - 10V BMS input or through ModBus/BACnet and the BMS Thermostat Input
is set to INACTIVE, the Off Differential Volts parameter determines how far below the On Volts setting the 0 - 10V BMS input
voltage must be in order to disable the water heater. The minimum value is 0.2V and the maximum is the On Volts setting. The
default value is 1.0V.
21.7.12
MODBUS/BACNET
When BMS is set to ACTIVE (see BMS Active / Inactive) and the water heater is being controlled through BACnet or ModBus, set
ModBus/BACnet parameter to ACTIVE. Otherwise, set the ModBus/BACnet parameter to INACTIVE. Note that the water heater
can still be monitored by ModBus or BACnet with this parameter set to INACTIVE. The default value is INACTIVE
21.7.13
BAS T/O
This is the amount of time the unit controls will wait to receive a communication string from the BMS controller before reverting
back to its own internal parameters. This parameter is adjustable by the installer by accessing the BAS T/O parameter. The
adjustment range of this parameter is 5 seconds to 2 minutes. The default value is 10 seconds.
21.8

CIRCULATION PUMPS

21.8.1
DHW PUMP DELAY
The DHW pump delay parameter sets the length of time the DHW pump will run after a DHW demand has been satisfied. This
parameter is adjustable by the installer by accessing the DHW Pump Delay parameter. The time range for this parameter is 10
seconds to 40 minutes. The default time is 1 minute.
21.8.2
DHW PUMP ANTI-SEIZE DELAY
If the water heater pump does not run for 24 hours, it will be turned on briefly to prevent it from seizing. The length of time it runs is
determined by the DHW Pump Anti-Seize Delay parameter. The range of this setting is 0 seconds to 40 minutes. The default
setting is 20 seconds.
79