26
System Controlle
r
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
Wa
ter
Storage
Tank
Relief V
alve
Hot water supply line
(Copper or Stainless Pipe)
Return line circulation pum
p
Hot water return line
(Copper or Stainless Pipe
)
Cold
Wa
ter 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
Wa
ter
Supply
When installing 2 pumps in parallel
Thermostat
Pump Control
Wires (use
external rela
y
U
)
Unit 1
* Set “Y
es” 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.
