Navien NPE-180A, Руководство по обслуживанию

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10.5.2 Entering the R&D Information Menu
This section describes how to enter the R&D information mode to
configure various parameters and control system functions.
Entering the R&D Information Menu
Follow the instructions below to enter the R&D information menu.
1. On the Front panel, press the Power button to turn off the
water heater.
2. Enter the R&D information menu by pressing the Up (+) button
three times, the Down (-) button three times, and then the Up
(+) button four more times.
3. In the R&D information menu, use the Up (+) or Down (-)
buttons to move to 2.PAR (Parameter information mode), and
then press the Info button.
No. Mode Display
1 Technical Information
2 Parameter Information
4. To return to the previous menu (R&D information menu), press
the [Reset] button once.
10.5.3 Parameter Table
The following table lists the parameters used to configure the
water heater system functions.
No. Mode Display
4 Pump Exercise Operation Time
5 Burn Delay Time
6 Pump Post Purge Time
7 Outdoor Low Temperature Set-point
8 Outdoor High Temperature Set-point
No. Mode Display
9 CH MIN Set-point
10 CH MAX Set-point
11 2-Stage T/S Output Heat-Capacity
10.5.4 Configuring Water Heater Functions
This section describes the water heater functions and provides the
information required to configure the parameters for the desired
operation.
Pump Exercise Operation Time (P04)
The pump exercise function is designed to prevent the stagnation
of hot water in the heating system.
The pump exercise function operates every 24 hours. Pump
exercise operation time function sets the desired pump exercise
operation time differently depending on the plumbing as well as
environmental conditions.
With this option activated, the NPE-180A/240A water heater
monitors the pump operation. When it detects that a pump
has not been used for a specific period, it runs the pump for a
set duration. If the flow rate is not detected while the pump is
operating, the ‘E438’ error message is displayed.
To change the pump exercise operation time:
1. In the Parameter information time mode, use the Up (+) or
Down (-) buttons to select P.04. Then, press the Info button to
enter the Pump exercise operation time mode.
2. In the Pump exercise operation time mode, use the Up (+)
or Down (-) buttons to change the value and press the Info
button to set to the desired mode.
Range Description Display
1–240(sec)
Sets the exercise operation time
(default: 30 sec)