HTP ELP-199 - Manual (Page 67)

67
LP-294 REV. 2.20.14
(NOTE: Gas Type selection is necessary only if LP gas is used. Natural gas is the system default.)
LAMBDA CONSTANT MENU
These settings should only be modified by qualified personnel.
SCREEN DESCRIPTION
LambdaConstant
Gas Type
Selection
NG
Options:
NG - Natural gas, Methane
LPG - Liquid Propane Gas
Default is NG.
Table 35 – Selecting the Gas Type
1. To change Gas Type, press the ENTER key at this screen. Once Gas Type blinks, push the ▼ or ▲ keys to the appropriate
gas.
2. Push the ENTER button to make your selection.
3. After changing the gas type, measure the CO
2
and ensure it reads within allowed range of the specified gas type (see Table
32 for appropriate CO
2
levels).
2. PREPURGE INITIAL FAN SPEED
If the boiler is installed at high altitude or has a long flue and / or air intake, the Prepurge Initial Fan Speed may need to be reset. In the
Lambda Constant menu, navigate to the Prepurge Initial Speed screen. If the RPM number shown here is 0, there is nothing further to
do. If the number is something other than 0, refer to the Prepurge Initial Speed Reset screen detailed below to reset the prepurge fan
speed.
Pressing the ▼ or ▲ keys allows the Installer to view and/or adjust more data or return to the previous screen.
LambdaConstant 
Prepurge Initial
Speed
3460rpm The prepurge fan speed is measured during the first three complete heat demand cycles on the
boiler. The average fan speed is stored and displayed here. The default value is 0. The number 0
is displayed before 3 successful heat demands are completed.
Pressing the ▼ or ▲ keys allows the Installer to view and/or adjust more data or return to the previous screen.
LambdaConstant 
Prepurge Actual
Speed
3420rpm This is the prepurge fan speed of the last ignition. If this speed is not close to the Prepurge Initial
Speed displayed in the screen above, a
n “MF deviation Error” occurs. This error signals a
significant change in the air inlet, flue system, or possible heat exchanger blockage.
Pressing the ▼ or ▲ keys allows the Installer to view and/or adjust more data or return to the previous screen.
LambdaConstant 
Prepurge Initial
Speed Reset please
Switch off 0rpm
After checking the boiler, air intake, and flue system for blockage or other failure and measuring
the CO
2
values at low and high power, the installer can reset the Prepurge Initial Speed. To reset
the prepurge initial speed:
1. Press ENTER. The RPM number will begin to blink.
2. Press the
▼ key. The RPM number will go to 0.
3. Press ENTER again and the 0 RPM will stop blinking.
4. Turn boiler power off and wait 30 seconds.
5. Turn boiler power on again for the reset to occur.
Table 36 – Prepurge Initial Fan Speed
D. MODIFYING THE BOILER CONFIG, CH-SETTINGS, AND DHW-SETTINGS
1. BOILER CONFIG MENU
Once the gas type is selected, push the  key to leave LambdaConstant and return to the Installer Menu. Scroll to Boiler Config. Use
the  key to enter the menu.
To change values, press ENTER until the value starts blinking. Use the
▲ or ▲ keys to change the value. Once the appropriate
selection is made, hold the ENTER button until the value stops blinking to save the selection.
SCREEN DESCRIPTION
BOILER CONFIG
Address Selection
Boiler Address _0 
The Boiler Address defaults to 0 – Single Boiler without Cascading System. Other selections are
as follows:
1 - Master Boiler
2
– 16 - Follower Boilers.
NOTE: After setting, it may be a minute until the “Cascade Master” LED lights or turns off.
Once the address is selected, use the ▼ key to scroll to Pump Mode.