Table of Contents
Advertisement
21.4.5
TANK MINIMUM SET POINT
This setting controls the minimum tank set point for the tank temperature. The installer can adjust this by accessing
the Tank Minimum Set point parameter. The minimum setting is16°C and the maximum setting is the maximum tank
set point (Tank Maximum Set point parameter). The default value is 16°C.
21.4.6
TANK MAXIMUM SET POINT
This setting controls the maximum tank set point for the tank temperature. The installer can adjust this by accessing
the Tank Maximum Set point parameter. The minimum setting is the minimum tank set point (Tank Minimum Set point
parameter) and the maximum setting is 88°C. The default value is 88°C.
21.5
ANTI-CYCLING
21.5.1
ANTI-CYCLING TIME
Once the burner turns off, a set amount of time must elapse before the control will respond to a new demand. The
control will block the new heat demand and anti-cycling will be shown in the display until the time has elapsed or the
water temperature drops below the Anti-Cycling Override Differential parameter. This parameter can be changed by
the installer by accessing the Anti-Cycling Time parameter. The time range for this parameter is 1 minute to 10
minutes. The default value is 1 minute.
21.5.2
ANTI-CYCLING OVERRIDE DIFFERENTIAL
The control will bypass the anti-cycling time if the inlet water temperature drops too much. The control will use the
inlet water temperature present at the water heater when it shuts off as the starting point. If the inlet temperature
drops below the temperature parameter the control will abort anti-cycling and allow the water heater to fire. This
parameter can be changed by the installer by accessing the Anti-Cycling Override Differential parameter. The
temperature range of this parameter is 0°C to 30°C. The default value is 6°C.
21.6
CONTROL MODES
21.6.1
CONTROLLING SENSOR
The controlling sensor parameter selects the sensor the control will use to regulate the water heater firing rate. This
parameter is adjustable by the installer by accessing the Controlling Sensor parameter. The sensor selections are as
follows: The outlet sensor regulates the firing rate based on the outlet water temperature of the water heater and the
inlet sensor regulates the firing rate based on the inlet water temperature of the water heater. If the outlet sensor is
selected, and the optional system supply sensor is connected, the control will regulate the firing rate based on the
system supply sensor temperature. The default sensor is the Outlet Sensor.
21.6.2
CASCADE ADDRESS
The water heater designated as the Leader needs to be programmed with address 0. All the Member water heaters
require addresses from 1 to 7, and the addresses must be different for each Member. The addresses can be in any
order, regardless of the order in which the units are wired together. This parameter is adjustable by the installer by
accessing the Cascade Address parameter The default address is 1.
21.6.3
MAXIMUM CASCADE SET POINT
This parameter determines the set point used by the individual water heaters in a Cascade when a system sensor is
connected to the Leader water heater. When a water heater is commanded to fire by the Leader water heater, it will
attempt to achieve this temperature at its outlet. The Leader water heater will limit the modulation of the water
heater(s) in order to hold the temperature at the system supply sensor to the user set point. If any of the water heater
outlet temperatures reach the maximum cascade set point, that water heater will then modulate down on its own in
order to keep its outlet temperature within the maximum cascade set point. Therefore, this parameter can be used to
limit the outlet temperatures of all the water heaters in a Cascade this parameter is adjustable by the installer by
accessing the Maximum Cascade Set Point parameter. The temperature range of this parameter is 0°C to 88°C. The
default maximum cascade set point is 85°C.
83
Advertisement
Table of Contents
