E93.1803.901 HW
82
General
The water heater controller is designed to function as a standalone control unit for intermittent operation on heating
appliances with a premix (modulating) burner and a pneumatic air-gas system.
13.1.12
P
UMP START EXERCISE EVERY
24
HOURS
To protect the pump from getting stuck at a certain position it is forced to run for 10 seconds every 24 hours. This
is done only for the water heater loop pump at the start-up of the board.
13.1.13
F
ROST PROTECTION
The Frost protection function protects the water heater and water heater loop from freezing.
The T_Supply, T_Supply_2 and T_Return sensors are checked for generating a Frost protection demand.
• When any of the sensors drop below FP_Start_Pump the water heater loop pump is switched ON for CH.
• When any of the sensors drop below FP_Start_Burn the water heater is fired.
• When all of the sensors measure above FP_Stop the Frost protection demand is ended.
When the demand for Frost protection is ended the pumps will post-circulate for CH_Post_Pump_Period.
Parameters are factory set.
Fuses
Mains input
1 x 5AT, 230V
V
Flame establishing period
2 seconds
Safety time
5 seconds
Ignition attempts
3
Pre-purge time
≥ 2…60 seconds (not safety critical)
Pre-ignition time
2 seconds (not safety critical)
Flame failure response time
< 1.0 second
Flame-current
Minimum
1.0
μA
Start-detection
1.5
μA
Cable length AL-BUS
1
mm
2
(AWG) Cable length m (ft)
0.25 (23) 100 (328.1 ft)
0.5 (20) 200 (656.2 ft)
0.75 (18) 300 (984.3 ft)
1.0 (17) 400 (1312.3 ft)
1.5 (15) 600 (1968.5 ft)
1)
This consists the total length of the cable, not the length between two water heaters. The length differs with the diameter of the cable.
Содержание CB 105 HW
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