Navien NR-180A, Operation & Installation Manual

Page: 49 / 89

INSTALLATION
49
May vary according to user’s environment changes mentioned below.
1) DHW Storage tank’s stoppage.
-. Able to change cascade connected water heater’s stoppage temperature.
-. Combustion stoppage temperature
= DHW setup temperature – R/C combustion stoppage setup value
2) Cascade On unit temperature setting when using storage tank
-. Able to adjust cascade connected water heater’s initiation temperature.
-. Cascade On unit’s temperature
= DHW setup temperature – R/C cascade ON unit setup value
3) Cascade OFF unit temperature setting when using DHW storage tank.
-. Able to adjust cascade connected individual water heater’s initiation
temperature.
-. Cascade ON unit temperature
= DHW setup temperature – R/C cascade OFF unit setup value
█ Dip Switch Setting
If combustion stoppage temperature isn’t changed, combustion will stop at the DHW setup
temperature.
If remote controller cascade ON unit temperature isn’t changed, default value is 13ºF.
If remote controller cascade OFF unit temperature isn’t changed, default value is 9ºF.
Min
Max
Modulating Gas
Valve Adjusting
Dip S/W 5
ON
Description
NO.
Function ON OFF
1
DHW Storage Tank
Mode Select
ON OFF