HTP EFTU-199WCN - Complete Cascade Technical Menu Parameters

LP-743 Rev. 000 Rel. 000 Date 8.25.20
13
Menu
Sub-Menu
Parameter
Description Value
Default
Setting
E. Complete Cascade Technical Menu Parameters
ACCESS the Complete Menu
1. Simultaneously press the “+” and “-” buttons for 5 seconds. The display shows 222.
2. Press the “+” button to select 234 , the service code.
3. Press the OK button. The display shows the rst “quick setting” PCB.
4. Press the “+” button until the display shows MENU.
5. Press the OK button to access the complete menu .
2 7 7
Burning Hours Harmonization
Sets the burner run hours statistics to equal the average of the other boilers in the cascade. Used when replacing the
PCB on the Master boiler. Perform this function ONLY on the boiler where the PCB has just been replaced.
25 CASCADE MANAGEMENT
25 0 GENERAL
25 0 0
Max CH Adjustable Power Percentage 0 - 100 100
Maximum Total Cascade CH Power
25 0 1
Max DHW Adjustable Power Percentage 0 - 100 100
Maximum Total Cascade DHW Power
25 0 2 Cascade Manager Turnover Logic
0 = Minimum Switches O - On
1 = Maximum Power Division
0
25 0 3
Cascade Manager Turnover Hysteresis 0 - 20% 2
Sets the dierence in power level between switching on and switching o the next boiler. See 25.0.4 and 25.0.5.
25 0 4
Cascade Manager Min Turnover Level
0 - par. 25.0.5 (%) 20
Sets the power level threshold where the next boiler is switched o. Switches o if required power is < 25.0.4 - 25.0.3. To
avoid short-cycling, ensure 25.0.4 is set to less than half of 25.0.5 setting. Applicable only when parameter 25.0.2 = 0.
25 0 5
Cascade Manager Max Turnover Level par. 25.0.4 - 100 (%) 70
Sets the power level threshold where the next boiler is switched on. Switches on if required power is > 25.0.5. Switches
o if required power is < 25.0.5 - 25.0.3. O logic only applicable if parameter 25.0.2 = 1.
25 0 7
CH On Dierential Temperature 0 - 36
o
F 11
Determines how much the System temperature can drop below target before turning the cascade back on.
25 0 8
CH/DHW Shifting Priority Time 0 - 1440 minutes 45
NOTE: See 25.2.6 - System DHW Charging Priority
25 1 SYSTEM SETTINGS
25 1 0
Automatic Temperature Control 0 = OFF, 1 = ON 1
Normally managed via par. 2.2.4 for a standalone boiler.
25 1 1
Outdoor Temperature Reading Correction -5 - +5
o
F 0
Normally managed via par. 2.4.9 for a standalone boiler.
25 1 2
CH Boost Interval 0 - 60 (minutes) 16
Sets the time delay between the automatic adjustments of the boiler target temperature in increments of +/- 7°F (normally
managed via par 2.4.4 for a standalone boiler). Only applicable when the type of temperature control is set to Basic Temp.
Control (Parameter 4.2.1 - 5.2.1 - 6.2.1 = 1)
25 1 3
Plant Frost Protection 0 = OFF, 1 = ON 0
CH system pump operates 10 minutes every 6 hours when outdoor temp = < 25
o
F; operates continuously when outdoor
temp < 23
o
F.
25 1 5 System Pump Overrun 0 - 15 minutes or OC (On Continuously) 5
25 1 6
System Pump Activation Logic 0 - 1 1
0 = Always Active – System pump runs for CH and DHW demands
1 = Only CH – System pump only runs during CH demands