U.S. Boiler Company ASPEN ASPN-320, Installation, Operating And Service Instructions

Page: 136 / 160

136
107750-01 - 9/17
Refer Section VII “Venting” to re-assemble any vent system components that are disassembled during this inspection and for
details on supporting, pitching, and terminating the vent system.
t. Reconnect any wiring which has been disconnected.
u.
Inspect the hydronic system
. Look for leaks and repair any found. If system contains antifreeze, or other additives,
test and/or maintain them as directed by the additive manufacturer. Refer to Section XI “Start-up and Checkout” for
important information on boiler water and the use of boiler water additives.
v. Inspect air vent(s) in hydronic piping. Ensure vents are unobstructed and properly functioning.
XIII. Service and Maintenance
(continued)
CAUTION
If burner comes on with no flow through the boiler. Turn the boiler off immediately. Failure to do so could
cause severe heat exchanger damage.
w.
Follow ALL instructions in
Section XI “Start-up and Checkout” to place the boiler back in service, including the
performance of a combustion test.
Outdoor Temperature
Ohms of
Resistance
°F °C
-20 -28.9 106926
-10 -23.3 80485
0 -17.8 61246
10 -12.2 47092
20 -6.7 36519
30 -1.1 28558
40 4.4 22537
50 10.0 17926
60 15.6 14356
70 21.1 11578
76 24.4 10210
78 25.6 9795
80 26.7 9398
90 32.2 7672
100 37.8 6301
110 43.3 5203
120 48.9 4317
Outdoor Air Temperature Sensor
Temperature versus Resistance
(P/N 102946-01)
(10kOhm NTC Sensor)
Temperature Ohms of
Resistance
°F °C
32 0 32648
50 10 19898
68 20 12492
77 25 10000
86 30 8057
104 40 5327
122 50 3602
140 60 2488
158 70 1752
176 80 1256
194 90 916
212 100 697
248 120 386
Supply, Return and Flue Temperature Sensor
and Header Temperature Sensor
(P/N 101935-01 or 103104-01)
Temperature versus Resistance
(10kOhm NTC Sensor), Beta of 3950