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Opt iona l Equipm ent
I M PORTAN T: Sensors supplied wit h t his boiler are propriet ary t o t he m anufact urer. Use of alt ernat e m arket sensors
WI LL dim inish boiler perform anc
1k Ω
1.
Out door Air Sensor, if used.
A. Boiler aut om at ically recognizes sensor when used.
B. See Chart 1 for sensor dat a. Sensor part num ber BD710487302V
C. Locat e out door sensor t o prot ect against wind and direct sunlight . Mount ing inst ruct ions provided wit h sensor.
D. Maxim um wire lengt h is 100 ft ( 30m ) for 22 ga. wire, or 150 ft ( 45m ) for 18 ga. wire.
E. Connect wires t o M2 OUTDOOR SENSOR t erm inals 4 & 5. Wires are int erchangeable. See Accessories.
10k Ω
2.
Sensor for I ndirect DHW Tank ( Heat ing Only Boiler, Except ion: not applicable t o t he 165 m odel, use aquast at
for indirect t ank cont rol.) .
A. See Chart 2 for sensor dat a.
B. Connect wires t o M2 t erm inals 3 & 4.
CHART 1 -1K Ω OUTDOOR AIR SENSOR DATA
T
R
[ ° F]
[ Ohm ]
- 4.0
7,578
- 2.2
7,193
- 0.4
6,831
1.4
6,489
3.2
6,166
5.0
5,861
6.8
5,574
8.6
5,303
10.4
5,046
12.2
4,804
14.0
4,574
15.8
4,358
17.6
4,152
19.4
3,958
21.2
3,774
23.0
3,600
24.8
3,435
26.6
3,279
28.4
3,131
30.2
2,990
32.0
2,857
33.8
2,730
35.6
2,610
37.4
2,496
39.2
2,387
41.0
2,284
42.8
2,186
44.6
2,093
46.4
2,004
48.2
1,920
50.0
1,840
51.8
1,763
O P T I O N AL EQ U I P M EN T
e.
T
R
[ ° F]
[ Ohm ]
53.6
1,690
55.4
1,621
57.2
1,555
59.0
1,492
60.8
1,433
62.6
1,375
64.4
1,321
66.2
1,268
68.0
1,218
69.8
1,170
71.6
1,125
73.4
1,081
75.2
1,040
77.0
1,000
78.8
962
80.6
926
82.4
892
84.2
858
86.0
827
87.8
796
89.6
767
91.4
740
93.2
713
95.0
687
96.8
663
98.6
640
100.4
617
102.2
595
100.4
617
102.2
595
104.0
575
106.0
556
CH ART 2 - 10K Ω I N D I RECT T AN K SEN SO R D AT A
T
[ ° F]
[ Ohm ]
32.0
33.8
35.6
37.4
39.2
41.0
42.8
44.6
46.4
48.2
50.0
51.8
53.6
55.4
57.2
59.0
60.8
62.6
64.4
66.2
68.0
69.8
71.6
73.4
75.2
77.0
78.8
80.6
82.4
84.2
2 9
R
T
[ ° F]
32,505
86.0
30,898
87.8
29,381
89.6
27,946
91.4
26,590
93.2
25,308
95.0
24,094
96.8
22,946
98.6
21,859
100.4
20,829
102.2
19,854
104.0
18,930
105.8
18,054
107.6
17,223
109.4
16,436
111.2
15,689
113.0
14,980
114.8
14,306
116.6
13,667
118.4
13,060
120.2
12,483
122.0
11,935
123.8
11,414
125.6
10,919
127.4
10,447
129.2
9,999
131.0
9,572
132.8
9,166
134.6
8,779
136.4
8,411
138.2
PN 240012875 REV. D [ 03/ 15/ 2022]
R
[ Ohm ]
8,060
7,726
7,407
7,103
6,813
6,537
6,273
6,021
5,781
5,551
5,332
5,123
4,923
4,732
4,549
4,374
4,207
4,047
3,894
3,748
3,608
3,473
3,345
3,222
3,104
2,991
2,882
2,778
2,679
2,583
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