29
G
(1 1/4"-2")
Unit 6
Unit 2
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
㸯
Storage
Tank Circulation Pump
㸰
(if Necessary)
Gas Pipe
Hot W
ater
Storage T
ank
Relief V
alve
Hot water supply line
(Copper or Stainless Pipe)
Return line
circulation pump
Hot water return line
(Copper or Stainless Pipe)
Cold W
ater 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 W
ater
Supply
Remote
Controller
When installing 2 pumps in parallel
Thermostat
Pump Control
Wires (use
external relay
V
)
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
.
*
T
o achieve the highest recovery
, size the storage tank circulation pump for maximum capacity
.
(9 GPM (each) @ 40 ft. of head (160°F setting or less) + piping losses through the system.)
V
erify the supply pressure to the units is at least 30 PSI.
