Eco-King HWB-299, Installation And Service Manual

Page: 33 / 124

E93.1801EN171 HWB installation manual 33
8.1.3 P
UMP CONTROL
The applied pump must be a bronze or SS pump and controlled only by the HWB water heater control.
If, for any reason, an external pump control is applied
without written approval of Eco King then the
complete warranty on the HWB water heater and all delivered parts will become invalid.
8.1.4 T
ANK SENSOR
The tank (immersion) sensor has to be mounted at 1/5 from the bottom of the tank. So at a tank with a total height
of 80 inch the sensor has to be mounted at 16 inches from the bottom.
A bulb immersion tank sensor is standard supplied with the shipment.
Part number S022.500.009
When using another type or brand sensor be sure it meets the following specifications:
NTC 10K@77 °F (25°C) B3977k 3%@140°F (60°C
Temperature
°F (°C)
Resistance
(Ω)
Temperature
°F (°C)
Resistance
(Ω)
Temperature
°F (°C)
Resistance
(Ω)
Temperature
°F (°C)
Resistance
(Ω)
-40 (-40) 334275 50 (10) 19897 122 (50) 3599 212 (100) 674
-22 (-30) 176133 68 (20) 12493 140 (60) 2454 230 (110) 506
-4 (-20) 96761 77 (25) 10000 158 (70) 1748 248 (120) 384
14 (-10) 55218 86 (30) 8056 176 (80) 1252 266 (130) 296
32 (0) 32624 104 (40) 5324 194 (90) 912 284 (140) 230
8.1.5 S
YSTEM
S
ENSOR IN CASE OF CASCADING HEATERS
When cascaded heaters and tanks are applied with DHW mode 4 its mandatory to use also a strap-on sensor
besides the immersion tank sensor. This system sensor has to be connected to connections 3-4 “System Sen-
sor”
The strap-on system sensor has part number S022.500.008 and same specifications as above mentioned.
8.1.6 R
ETURN AND
S
UPPLY PIPING
T
ANK
To get a good mix of hot and cold water and therefore a better temperature arrangement of Water Heater and
Tank the Supply and Return pipe of the tank should be situated in the bottom 20% of the tank height preferable.