Navien NFB-175H Installation Manual page 127

Absolute
MAX
Absolute
MIN
Space Heating Temperature Setting for the Outdoor Reset Control Feature
The following tables list the default space heating temperature range by system heat load and the applicable
outdoor temperature ranges.
Outdoor Temperature Sensor Installation Guidelines
Heat Load
Finned Tube Baseboard (default)
Fan Coil
Cast Iron Baseboard
Low Mass Radiant
High Mass Radiant
Radiators
Custom
Outdoor Temperature Range and Default Temperature Settings
Set Point
Outdoor Low Temperature
Outdoor High Temperature
Outdoor
High MIN
°F 113 104 95 86 77 68 59 50 41
°C 45 40 35 30 25 20 15 10 5
Supply Set Point Range
120-180°F (48.5-82°C)
140-180°F (60-82°C)
100-170°F (37.5-76.5°C)
80-140°F (26.5-60°C)
80-120°F (26.5-48.5°C)
120-170°F (48.5-76.5°C)
104-180°F (40-82°C)
Range
-4°F (-20°C) to Outdoor High
Temperature Set Point - 9°F (5°C)
Outdoor Low Temperature Set
Point + 9°F (5°C) to 104°F (40°C)
Outdoor
Low MIN
°F °C
190 88
185 85
176 80
167 75
High Mass Radiant
158 70
Low Mass Radiant
149 65
140 60 Cast Iron Baseboard
131 55
Custom
122 50
Radiator
113 45
104 40
Finned Tube Baseboard
95 35
Fan Coil
86 30
77 25
68 20
59 15
50 10
32 23 14 5 -4 -13
0 -5 -10 -15 -20 -25
Return Set Point Range
101-147°F (38-63.5°C)
116-147°F (46.5-63.5°C)
86-139°F (30-59°C)
70-116°F (21-46.5°C)
70-101°F (21-38°C)
101-139°F (38-59°C)
86-149°F (30-65°C)
Remarks
Default: 14°F (-10°C)
Default: 70°F (21°C)
Appendixes 127