PLUMBING
The ThermElect Hydronic system should be plumbed with a primary loop and secondary (zone) loops. The
primary loop needs to consist of a minimum of 12’ of 1.25” pipe. The heat exchanger inlet and outlet are
1.5” diameter, reducers will be required if 1.25” pipe is elected for the primary loop. The secondary (zone)
loops require additional pump(s) to operate effectively. Refer to Typical Primary Loop and the Typical System
Plumbing Diagrams below for installation information.
The primary loop serves to regulate heat transfer from the system’s heat exchanger. The primary loop pump
should be powered by ThermElect Hydronic control system as shown in Figure 11. If using other control
method, flow MUST continue for at least 30 seconds at the end of a heat call.
TYPICAL PRIMARY LOOP
FIGURE 11
TYPICAL SYSTEM \PLUMBING SINGLE
TEMPERATURE ZONES
FIGURE 12
NOTE:
There are many additional ways
to connect plumbing and regulate
temperature from the
primary loop onward.
Air Vent
Air Separator
1
Expansion
Tank
Pressure
Relief Valve
(Factory Supplied)
Optional
Temperature and
Pressure Relief Valve
(Consult Local Code)
Inlet
Outlet
*Primary
Loop
Pump
Piping MUST
Be Supported
Zone
Connection
Area
Primary Loop Pump
Control Wiring
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