Navien NHB-055 Service Manual

NHB Service Manual 41
Version 1.0
4.4.10 Information display (for servicer)
1. At the <Normal operation mode>, press the [Diagnostic] button once to access the service information display.
2. Press [+] or [-] to navigate through the user parameters.
3. Item of current SERVICE Information Data is indicated as an alphabetical numbering on the first segment and relevant DATA value is
indicated at the 2
nd
, 3
rd
and 4
th
segment. (Alphabetical numbering A ~ Z are indicated and next ones are indicated as 1 ~ 9, then those after
that are indicated as symbols.)
4. The proper units are indicated with the LCD ICON for the applicable input items (Example: Water pressure - psi)
5. Press the [Reset] button once to return to the <Normal operation mode>.
6. If there is no button input for 1 hour, then the system automatically returns to the <Normal operation mode>.
Item Description Display
(A) Space heating supply
water temperature
Display of the current space
heating outgoing water
temperature
For Celsius (°C) mode;
ex) at 60°C
For Fahrenheit (°F) mode;
ex) 120°F
(B) Space heating return
water temperature
Display of the current space
heating incoming water
temperature
For Celsius (°C) mode;
ex) at 60°C
For Fahrenheit (°F) mode;
ex) 120°F
(F) Outdoor air temperature
(with optional Outdoor
Temperature Sensor only)
Display of current outdoor
temperature
Outdoor Temperature display for Celsius (°C) mode
with optional sensor,
ex) at 15°C
Outdoor Temperature display for Fahrenheit (°F) mode
with optional sensor,
ex) at 59°F

Navien NHB-055 Specifications

General

Brand	Navien
Model	NHB-055
Category	Boiler
Language	English