Alpine Installation, Operating, and Service Instructions

103448-10 - 6/18 129
XI. Service and Maintenance (continued)
E. Condensate Overflow Switch and Condensate
Trap Removal and Replacement:
For removal or replacement of the condensate
overflow switch and/or condensate trap follow the
steps below. For parts identification, refer to Section
XIII “Repair Parts”.
1. Condensate Overflow Switch Removal and
Replacement:
a. Disconnect power supply to boiler.
b. Remove 2 wire nuts and disconnect overflow
switch wire pigtails from boiler wiring.
c. Using pliers, release spring clip securing the
overflow switch to condensate trap body and
remove the switch. Note that the switch has
factory applied silicon adhesive seal, which
may have to be carefully cut all around to
facilitate the switch removal.
d. Insure the trap overflow switch port is not
obstructed with silicon seal debris, clean as
needed.
e. Apply silicon sealant to the replacement switch
threads and install the switch into the trap
body making sure it is properly oriented - the
arrow molded into the switch hex end side
must face down for proper switch operation.
See Figure 47 “Condensate Overflow Switch
Orientation” for details.
f. Reconnect the switch wire pigtails to the boiler
wiring and secure with wire nuts.
g. Restore power supply to boiler. Fill up the trap
(see Section V “Condensate Disposal”) and
verify the switch operation.
2. Condensate Trap Removal and Reinstallation:
a. Disconnect power supply to boiler.
b. Remove 2 wire nuts and disconnect overflow
switch wire pigtails from boiler wiring.
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)
Header Temperature Sensor
Temperature versus Resistance
(P/N 101935-01 or 103104-01)
(10kOhm NTC Sensor), Beta of 3950
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
Temperature Ohms of
Resistance
°F °C
32 0 36100
50 10 22790
68 20 14770
77 25 12000
86 30 9810
104 40 6653
122 50 4610
140 60 3250
158 70 2340
176 80 1710
194 90 1270
212 100 950
230 110 730
248 120 560
Supply, Return and Stack Temperature
Sensor Temperature versus Resistance
(12kOhm NTC Sensor), Beta of 3750
Poison Hazard. Use
only inhibited propylene glycol solutions
specifically formulated for hydronic systems.
Do not use ethylene glycol, which is toxic and
can attack gaskets and seals used in hydronic
systems. Use of ethylene glycol could result in
property damage, personal injury or death.
WARNING