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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 84M, the flow will be limited to 1.25 GPM.)
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
page 13)
* If the tank thermostat will control the pump
set dipswitch 2 to OFF.
(See SC-201-6M Installation Manual page 13)
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.
(For 84M, the flow is limited to 1.25 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
*
F
or the set temperature of the remote control, use the temperature (of the thermostat) + about 9°F.
*
T
o achieve the highest recovery, size the storage tank circulation pump for maximum capacity.
( N-132M: 12 GPM (each)@ 50 ft. of head (160°F setting or less), N-084M: 7.4 GPM (each)@ 40 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.
