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IV
Wiring Section
a) Disconnect all power sources before opening the main panel and working within.
b) Read the nameplate and other markings carefully and wire strictly in accordance with the wiring
diagram.
c) Wires and protective equipment must be sized according to the applicable Electrical Code.
d) Use only wires suitable for minimum 167°F.
e) Install the outdoor sensor on an exterior North wall and connect it with 18/2 wire to terminals "OT /
OT" on the electronic board (TH-600 series controller).
f) On the electronic aquastat (marked "WATER TEMPERATURE"), select the maximum water
temperature required (1-10) by the type of installation. Please see Table 6 below for the temperature
obtained according to the knob position. The minimum water temperature is reset automatically by the
outdoor sensor. Please see the variation graph in Fig 5.
Maximum
temperature
Minimum
temperature
Electronic Aquastat
g) The outdoor sensor will :
- Maintain the selected maximum water temperature when the outdoor temperature is at +14° F
or colder.
- Automatically and proportionally compensate by varying the water temperature between the
maximum and minimum when the outdoor temperature is between +14°F and +50°F.
- Maintain the minimum water temperature when the outdoor temperature is between +50°F and
+68°F.
- Prevent boiler operation above +68°F.
NOTE : The outdoor sensor is not required for the boiler to operate. If the outdoor sensor is not
installed, with a call for heat, the boiler will modulate to maintain the temperature selected on the
aquastat regardless of the outdoor temperature.
Water Temperature controlled by Electronic Aquastat
Set-point
10
°C
88
°F
190 178
48
°C
°F
118 118 118 113 104 100
Fig. 4
Table 6
9
8
7
6
81
75
67
58
167 153 137 122 113 107 102
48
48
45
40
MAXIMUM
WATER TEMPERATURE
°F
+14
+23
+32
+41
Fig. 5
Page 9
5
4
3
2
50
45
42
39
38
34
31
29
93
88
84
MINIMUM
WATER TEMPERATURE
+50
1
36
97
28
82
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