![background image](http://html2.mh-extra.com/html/navien/nfb-175h/nfb-175h_installation-manual_3700324127.webp)
127
Appendixes
45 40 35 30 25 20 15 10 5 0 -5 -10 -15 -20 -25
185
190
176
167
158
149
140
131
122
113
104
95
86
77
68
59
50
113 104 95 86 77 68 59 50 41 32 23 14 5 -4 -13
°F
°C
85
88
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
°F °C
Absolute
MAX
Absolute
MIN
Outdoor
High MIN
Outdoor
Low MIN
High Mass Radiant
Low Mass Radiant
Cast Iron Baseboard
Custom
Radiator
Finned Tube Baseboard
Fan Coil
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
Supply Set Point Range
Return Set Point Range
Finned Tube Baseboard (default)
120-180°F (48.5-82°C)
101-147°F (38-63.5°C)
Fan Coil
140-180°F (60-82°C)
116-147°F (46.5-63.5°C)
Cast Iron Baseboard
100-170°F (37.5-76.5°C)
86-139°F (30-59°C)
Low Mass Radiant
80-140°F (26.5-60°C)
70-116°F (21-46.5°C)
High Mass Radiant
80-120°F (26.5-48.5°C)
70-101°F (21-38°C)
Radiators
120-170°F (48.5-76.5°C)
101-139°F (38-59°C)
Custom
104-180°F (40-82°C)
86-149°F (30-65°C)
Outdoor Temperature Range and Default Temperature Settings
Set Point
Range
Remarks
Outdoor Low Temperature
-4°F (-20°C) to Outdoor High
Temperature Set Point - 9°F (5°C)
Default: 14°F (-10°C)
Outdoor High Temperature
Outdoor Low Temperature Set
Point + 9°F (5°C) to 104°F (40°C)
Default: 70°F (21°C)
Summary of Contents for NFB-175H
Page 134: ......