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6.4
The automatic pressure relief valve supplied with the boiler is required to prevent dangerous pressure
build-ups in the system in case of system malfunction and may under certain conditions vent hot water.
Do not install the system where water could damage rugs, furniture, etc. When piping the relief valve to a
drain, check with local authority for recommended method of installation. Do not open or tamper with the
relief valve. If operated frequently or used to drain or flush the system, the valve could fail to seat properly
and thus leak.
Important safety notice : This safety valve is mandatory and must be installed as shown in the
illustrations A, B and C at the end of this manual. The omission of the safety valve installation will
create a very serious safety hazard and will void all warranties.
6.5
Automatic air vents should be installed at the highest point of the installation, ideally on all radiator units
for best results or at points where air could possibly be trapped in the system.
Caution : Make sure the system has been reasonably vented before starting the unit.
7
Mechanical installation
7.1
Mounting brackets are located on the sides of the boiler. Depending on the size of the unit, four or six
holes are provided. The unit may be attached directly to a combustible surface.
7.2
Use a circulator pump of appropriate capacity for the intended application. The pump should be placed as
close as possible to the boiler. Ensure that the water direction is correct. An arrow indicating the
circulation direction is generally visible on the pump casing.
7.3
Install inlet and outlet piping.
7.4
Install air vents, valves, the pressure relief valve supplied with the unit, expansion tank, etc.
7.5
When everything is finished, install the temperature / pressure gauge.
8
Electrical installation
8.1
Disconnect all power sources before opening the main panel and working within.
8.2
Read the nameplate and other markings carefully and wire strictly in accordance with the wiring diagram.
8.3
Wires and protective equipment must be sized according to the applicable Electrical Code.
8.4
Use only wires suitable for minimum 167°F.
8.5
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 controller).
8.6
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.
Water Temperature controlled by Electronic Aquastat
Set-point
Maximum
temperature
Minimum
temperature
Table 6
10
9
8
°C
78
73
68
61
°F
172 163 154 142 129 120 111 104
°C
48
48
48
45
118 118 118 113 104 100
°F
6
7
6
5
4
54
49
44
40
40
38
34
31
93
88
3
2
1
37
36
99
97
29
28
84
82
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