Eco Heating Systems CB 105 HW, Инструкция по установке, обслуживанию и эксплуатации

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E93.1803.901 HW 107
16.1.5 C
ASCADE
–
P
OWER BALANCE MODE
Several different power control modes can be selected to operate the cascade system.
• Power mode 0: Power control disabled, each water heater modulates based on the system setpoint.
• Power mode 1: Power control algorithm to have a minimum amount of water heaters active.
• Power mode 2: Power control algorithm to have a maximum amount of water heaters active.
• Power mode 3: Power control algorithm to have a balanced amount of water heaters active.
Cascade
– Water heater rotation
The water heater rotation function can change the start/stop sequence for the cascade water heaters.
The parameter Water heater_Rotation_Interval sets the number of days after which the sequence is updated.
When Water heater_Rotation_Interval is set to 0 water heater rotation is disabled.
When the parameter Burner_Rotation_Interval is updated the water heater rotation days left will be initialized to
the new Burner_Rotation_Interval setting.
When for example Burner_Rotation_Interval = 5 the start sequence is as following (x is the last water heater):
Days Start/Stop sequence
Day 0-5 1-2-3-4-5-6..x
Day 5-10 2-3-4-5-6..x-1
Day 10-15 3-4-5-6..x-1-2
Day 15-20 4-5-6..x-1-2-3
Day 20-25 5-6..x-1-2-3-4
With parameter First_Depending_To_Start the current depending that is first to start in the sequence is selected.
When the water heaters are rotated the parameter First_Depending_To_Start is automatically updated to the next
depending. When water heater rotation is disabled the parameter First_Depending_To_Start is reset to 0.
When the First_Depending_To_Start is manually changed the control will clear all demand of the cascade control.
After this is will start cascade demand generation with the new selection for First_Depending_To_Start.
16.1.6 N
EXT DEPENDING TO START SELECTION
When the cascade Burner_Rotation_Interval has passed the control will perform the cascade rotation. At this
moment the next available control based on the current First_Depending_To_Start is selected.
A depending control is available when the control is present on the communication bus and the control is not
blocked by an error.
When the control is not available the control is skipped as the next First_Depending_To_Start.
Relevant variables
Cascade Error handling
16.1.7 C
ASCADE
F
ROST PROTECTION
Frost protection on a cascade is active on two levels
1. Frost protection for burner cascade
The ‘frost protection’ function for a burner cascade is related to the water heater sensor temperatures.
When the supply / Inlet temperatures of the managing water heater are below:
Cascade_Frost_ Protection: The cascade CH/system pump and the general pump of the managing water
heater start running.
Default: 15 °C
(59 °F)
Cascade_Frost_Protection
minus 5°C (minus 9°F) Cascade heat demand is activated; the general pumps of all the cascaded wa-
ter heaters will be started.
Demand with setpoint Cascade_Frost_Protection minus 5 allows the water
heater to start burning.
15 minus 5 = 10 °C
(59 minus 9 = 50 °F)
Cascade_Frost_Protection
plus 5 °C (plus 9 °F) Above this temperature, the water heater stop burning. 15 plus 5 = 20 °C
(59 plus 9 = 68 °F)
Specific Parameters Level (Default) Value Range
(84) Module_Rotation_Interval 2: Installer 5
0…30
(0: Disabled)
(149) First_Module_To_Start 2: Installer 1
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