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

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E93.1801EN171 HWB installation manual 75
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.
13.6.1 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.
13.6.2 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.
Mains input 1 x 5AT, 120V
Flame establishing period 2 seconds
Safety time 5 seconds
Ignition attempts 5
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
AWG (mm
2
) Cable length (m)
23 (0.25) 328.1 ft (100)
20 (0.5) 656.2 ft (200)
18 (0.75) 984.3 ft (300)
17 (1.0) 1312.3 ft ( 400)
15 (1.5) 1968.5 ft (600)
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.