Steffes 9180 - Manual (Page 20)

installa
tion
installa
tion
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 re-
quire 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 meth-
od, flow MUST continue for at least 30 seconds at the end of a heat call.
TyPICaL PRIMaRy LOOP
FIgURE 11
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
T
herm
e
lecT
h
ydronic
i
nSTallaTion
 3.11 i
nSTallaTion
 3.10 T
herm
e
lecT
h
ydronic
TyPICaL SySTEM PLUMBINg SINgLE TEMPERaTURE ZONES
FIgURE 12
Single Temperature Zone
NOTE: There are many additional ways to connect plumbing and regulate temperature from the primary loop onward.
White
Red
Primary Loop Secondary Loop
Primary
Loop Pump
ThermElect
Hydronic
Exchanger
This Valve Must
Be Open during
Normal Operation
White
Red
Primary Loop Secondary Loop