35
G
(1 1/4"-2")
Unit 6
Unit 2
System Controller
Storage tank supply lin
e
(1 1/4"-2")
Storage tank return lin
e
(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
Ta
nk
Relief
Va
lv
e
Hot water supply lin
e
(Copper or Stainless Pipe)
Return lin
e
circulation pump
Hot water return lin
e
(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
ate
r
Suppl
y
Remot
e
Controlle
r
When installing 2 pumps in parallel
Thermosta
t
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
.
*
To 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.)
Verify the supply pressure to the units is at least 30 PSI.
