Navien NP-180, Руководство по обслуживанию

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©N
avien
Am
eri
c
a
I
n
c
. 20
1
0
NR/NP
series servi
c
e Manua
l
46
Versi
o
n 2.0
4.6.4. High Limit Switch or Exhaust Limit Switc
Navien Part No.
Function
Failure Event
1. Overheating preventing switch.
2. Due to the high temperature, it will automatically trip and automatically reset.
3. Detects excessively high water temperature (more than 197.6
ȕ or 92 Ȕ )
in heat exchanger. (BH1401022A)
4. Detects excessively high flue gas temperature (more than 149
ȕ
of 65
Ȕ
)
in exhaust duct. (BH1401027A)
1. Unable to detect excessively high water temperature if switch fails.
2. Unable to detect excessively high flue gas temperature if switch fails.
1. Unable to shut down the water heater if the water temperature from the
heat exchanger exceeds 197.6
ȕ
(92
Ȕ
).
2. Unable to shut down the water heater if the flue gas temperature from the
exhaust duct exceeds 149
ȕ
(65
Ȕ
).
E016, E030
1. Visual inspection: Connection and/or breakage of wires.
2. Voltage check: Check range of voltage shown below.
1. Yellow – Yellow : DC 4 ~ 6 V
2. Red – Red : DC 4 ~ 6 V
RII#+RSHQ,
Flue Gas
47<两6<15乹
+98两7丯,
437两6<15乹#+73两7丯,
+Dxwrqdwlf#Uhwxuq,
4:319两6<15乹#+::两7丯,
+Dxwrqdwlf#Uhwxuq,
4:<19两6<15乹
+<5两7丯,
Water
RQ#+FORVH,
Effects
Error Code
Diagnostic
BH1401022A
BH1401027A
Check Point B
Color /
Number of wires