Instructions / Assembly

Water Recirculation Piping Diagram (with Dedicated Return Line)
Shut-off
valve
Hot water
to fixtures
Hot water
loop
Dedicated
return line
(Copper pipe)
Cold water
supply
Check
valve
Expansion
tank
Cold water
to tankless
water heater
Check valve
Tankless
water heater
Pump power
cord - 6 ft long
Power receptacle
should be close to
appliance
Push button
(installed at
desired location)
Gray wire
50” long
Tankless water heater
power cord
Extended
cabinet
with pump
(Front cover)
Service valves
Remote
control
Shut-off
valve
CAUTION: Lines should be cleaned and flushed before installing pump. DO NOT energize pump until installation is completed and the
system is checked for leaks, air is purged and completely filled. Pump should be flooded with water before it is started.
CAUTION: Avoid running circulator pump dry as this will damage the circulator pump.
NOTICE: To conserve energy and minimize heat loss, insulation of hot water lines is recommended
Pump Connection
Size
3/4” male NPT 115VAC/60Hz/1 3250 1/25
Voltage/Frequency/Phase RPM HP
Motor
Pipe diameter (Copper pipe) 3/4” 1/2”
*Equivalent pipe length includes hot water lines, return lines and all fittings.
Maximum allowable equivalent
pipe length
400 ft. 100 ft.
Maximum Allowable Equivalent Pipe Length*
Figure 6
Table 2
Table 3
5