29
G
(1 1/4"-2")
Unit 6 Unit 2 Unit 1
System Controller
Storage tank supply line
(1 1/4"-2")
Storage tank return line
(Copper or Stainless Pipe)
(Copper or Stainless Pipe)
Storage Tank Circulation Pump 1
Storage Tank Circulation Pump 2
(if Necessary)
Gas Pipe
Hot Water
Storage Tank
Relief Valve
Hot water supply line
(Copper or Stainless Pipe)
Return line
circulation pump
Hot water return line
(Copper or Stainless Pipe)
Cold Water Supply
* Size the water supply piping to
allow for maximum flow rates
of the building.
* Set dipswitch 3 to OFF.
(See SC-201-6M Installation Manual)
* If the tank thermostat will control the pump
set dipswitch 2 to OFF.
(See SC-201-6M Installation Manual)
Do not connect more than one pump to the
tank thermostat.
Hot Water
Supply
Remote
Controller
Option 2-Unit
Control
Option 1-Tank
Thermostat Control
When installing 2 pumps in parallel
The system controller will stop the units from heating when the tank is up to temperature,
and the unit will cut the flow through it to 2.5 GPM.
Install the plumbing so that a change in flow will not damage the pump.
Thermostat
System select connector
Connect to the “Sto-
rage system”
connector"
Pump Control
Wires (use
external relay)
* Also
disconnect this
connector on units 2-6
Disconnect this Connector
B-2. Example of Installation with a Storage Tank and Recirculation System
The pump will push water through the Multi-System to heat up the tank.
When the return temperature is high, the flow within the device will be limited to 2.5 GPM*.
* For the set temperature of the remote control, use the temperature (of the thermostat) + about 10°F.
* To achieve the highest recovery, size the storage tank circulation pump for maximum capacity.
( 12 GPM (each) @ 50 ft. of head (160°F setting or less) + piping losses through the system). Verify the supply
pressure to the units is at least 30 PSI.
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