Eco-King HWB-299, Инструкция по установке и обслуживанию

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E93.1801EN171 HWB installation manual 76
13.6.3 F
LUE TEMPERATURE PROTECTION
The flue temperature protection function protects against the flue gas reaching a too high temperature.
• When the T_Flue or T_Flue_2 sensor measures above the Max_Flue_Gas_Temp, the control generates a
Flue_Gas_Error.
• When the Flue Switch closes, the control generates a Flue_Gas_Error.
When the control is in a Flue_Gas_Error the fan will run at the minimum fan speed.
Water heater power limitation
All water heaters have a flue gas sensor. The control will limit the water heater power when the flue gas tempera-
ture reaches the set Max_Flue_Gas_Temp. The maximum water heater power is linearly limited when the flue gas
temperature is within Max_Flue_Gas_Temp 41 ºF (5 ºC) and Max_Flue_Gas_Temp.
Parameters are factory set
13.6.4 A
PPLIANCE SELECTION
The control is designed to store specific parameter sets. When this parameter is changed the following settings
can be changed:
• Maximal fan speed
• Minimal fan speed
• Ignition speed*
• Maximum flue gas temperature
*Ignition speed is the same as Pre-Purge Speed and Post Purge speed.
The parameter can be used for conversion from natural gas to propane, see § 18.5.
Ignition cycle
During the ignition cycle multiple safety checks are active
False flame detection If flame is detected at the end of the pre-spark period (Pre-ignite) a lockout error occurs
Re-ignition If at the end of the safety period, no flame is detected the control will go to post-purge to
remove the unburned gas. After this a re-ignition attempt is started following the same cycle.
Flame establishing time Sparking stops in the Flame Proving state to allow for ionization detection. The
Flame Proving state takes Safety_Period - Ignit_Period.
Flame out too late If at the end of the Post purge 0 state, the flame is still detected a lockout follows.
Flame loss When a flame is lost during a burn cycle the control will restart the water heater once. At the
second flame loss the water heater will stop and blocking mode follows. The number of re-
starts is limited by the Max_Flame_Trials setting. (Default set to 1)
Fan supervision
The fan speed is continuously monitored.