Install Instructions

26
System Controller
Remote Controller
G
(1 1/4"-2")
Unit 6 Unit 2
Storage tank supply line
(1 1/4"-2")
Storage tank return line
(Copper or Stainless Pipe) (Copper or Stainless Pipe)
Storage Tank Circulation Pump 㧝 Storage Tank Circulation Pump 㧞
(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 Pipe
* Size the cold water supply piping to allow for maximum flow rates of the building. * Be sure to connect the cold water supply pipe between the hot water storage tank and intake side of the storage tank circulation pump.
Hot Water Supply
When installing 2 pumps in parallel
Thermostat
Pump Control Wires (use external relayU)
Unit 1
* Set “Yes” for the question “Start pump rotation?” in system settings. (See SC-301-6M Installation Manual)
When installing 2 pumps in parallel
Set “Yes” for the question “Start pump rotation?” in system settings. (See SCU-301-12M Installation Manual)
B-2. Example of Installation with a Storage Tank and Recirculation System (Tank recirculation system)
The pump will push water through the Multi-System to heat up the tank.
When the temperature of the thermostat is high, the system controller will turn off the pump until
the the temperature cools down.
* For the set temperature of the remote controller, use the temperature (of the thermostat) + about 10°F. * To achieve the highest recovery, size the storage tank circulation pump for maximum capacity. (7 GPM (each) @ 35 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.