RainFlo 36667 User manual
®
12V/24V
Diaphragm Pumps
USER MANUAL
It is the installer’s responsibility to read, understand, and comply with these instructions.
1
A Guide to Your Diaphragm Pump
The high pressure 12V-DC (p/n 36667) or 24V-DC (p/n 36674) dia-
-
tion and thick casings result in extraordinarily quiet and reliable opera-
tion. The pump is controlled automatically by a built-in pressure switch.
1. FEATURES
• 4 chamber diaphragm pump
• Continuous duty
• Bypass: reduces cycling
• Self priming
• Quiet operation
• Ignition protected
• Run dry capable for normal
workloads
• Automatic: controlled by pres-
sure switch
• Industry standard mounting
pattern
2. APPLICATIONS
• Solar rainwater harvesting system
•
• Yacht/RV/caravan pressurized water system
•
•
• Any other pressurization systems
3. DIMENSIONS
2
4. INSTALLATION
Materials
- 1 diaphragm pump with related accessories
-
strength of twice the inlet collapsing pressure, hose must be mini-
- 4 stainless steel hose clamps and screws
- 4 screws to fasten the pump to the mounting surface
-
- 1 fuse
- 1 screwdriver
- 1 strong, cutting implement for tubing
-
Setup
1. The pump may be mounted in any position. If mounted vertically, the
pump head should be in the down position to avoid leakage into the
motor casing in the event of a malfunction.
2. Secure the feet, but do not compress them. Over-tightening the se-
curing screws may reduce their ability to dissipate noise and vibra-
tion.
3.
mm).
4. Plumb the system using high pressure (2 x pump rating) braided,
5.
avoid any inlet pressure completely.
6.
7. Strainer should be attached to the inlet side.
8.
9. Use clamps at both ends of hose to prevent air leaks into the water
line.
If a check valve is installed in the plumbing, it must have a cracking
pressure of no more than 2 PSI.
11. If applying a sealer or plumbing tape, be careful to not over-tighten,
as they may be sucked into pump.
12. This pump should be wired on its own dedicated circuit. Connect
the positive lead (red) to the positive terminal of the battery and the
negative wire (black) to negative terminal of the battery.
13. In an easily accessible location, install a switch to control electricity
or when the tank is empty.
14. The electrical circuit should be protected with an over-current protec-
3
fuse (12V) or a 5 amp fuse (24V).
15. The pump circuit should not include any other electrical loads.
16. As the water supply pump is non-essential, reference the wire chart
under the electrical information. Be sure to have the correct wire
sizing for the length of wire you are using.
17. After installation, check the voltage at the pump motor. Voltage
should be checked when pump is operating. Full voltage must be
available at the pump motor at all times.
Notes:
1. Flexible potable water hose or PEX tubing is recommended instead
of rigid piping at pump. If using rigid piping, provide a short length of
hose between pipe and the pump to avoid noise and vibration.
2. -
3. Do not adjust the bypass without the help of a technician.
4. Lack of sanitizing and maintenance is one of the main reasons of
under performance of the pump. Please perform maintenance and
winterize the pump at appropriate times, especially before and after
a period of storage.
About the Bypass
Please consult a professional technician in the case that the bypass
needs adjustment. Improper adjustment of the bypass may damage the
pump.
The bypass comes preset for optimal operation of the pump. If your
yourself. Carefully tighten the screw to increase or loosen the screw to
decrease the minimum operational pressure of the bypass.
CAUTION
Please follow the instruction manual to install the product. Any action
outside what is recommended in this manual may bring damage to the
pump. Any inappropriate installation or operation that causes the pump
damage is not covered by warranty.
4
5. SPECIFICATIONS Pump
Type 4 chamber positive displacement diaphragm
pump, self priming, capable of being run dry
Control Type Pressure switch and bypass control
Temperature
Priming Capabilities 6 ft. (1.8m) suction lift
Re-start Pressure
bar)
Inlet/Outlet Ports
Weight
Motor
Leads 16 AWG, 9.4 in. (24 cm) long with 2-pin connec-
tor/leads
Duty Cycle Intermittent
Fuse
Standard Pump Conguration
Part
Numbers Voltage Open Flow Control
Type Max Draw
36667/
36674 12V/24V
Switch and
bypass
Shut-o
Pressure Valves Diaphragm Ports Wire
Connections
55 PSI
(3.8 bar) Santoprene
2-pin/leads
Performance
Pressure Flow Current (Amps)
PSI Bar GPM LPM 12V 24V
2.85 3.9 1.15
2.27 4.5 1.84
1.38 1.96 5.1 2.24
1.59 5.8 2.64
5
2.72 1.32 6.3 2.97
3.45 1.11 6.7 3.28
55 7 3.37
6. ELECTRICAL INFORMATION
Ft. AWG
16 AWG
14 AWG
12 AWG
7. REPAIR KITS
Key Description Quantity
APump Head Assembly 1
BValve Assembly 1
CDiaphragm Assembly 1
D 1
1 Pressure Switch 1
2 Diaphragm of Pressure Switch 1
3 Pump Head 1
4 Diaphragm 1
5 Rubber Feet 1
6 1
A
1234
C
5
6
D
B
6
8. TROUBLESHOOTING
Pulsating Flow - Pump Cycles On and O
• Check line for kinks.
•
•
•
Noisy
• Check if the mounting feet are compressed too tightly.
•
• Check for loose head/screws.
• If the pump is plumbed with rigid pipe, then it may transmit noise
more easily.
Failure to Prime but Motor Operates - No Pump Discharge
• Restricted intake or discharge line.
• Air leak in the intake line.
• Punctured pump diaphragm.
•
• Debris clogged in the valves.
• Crack in pump housing.
Motor Fails to Turn On
• Loose or improper wiring.
• Pump circuit has no power.
• Blown fuse or thermal protection tripped.
• Failed pressure switch.
• Defective motor.
Pump Fails to Turn O After All Fixtures are Closed
• Punctured diaphragm.
• Discharge line leak.
• Defective pressure switch.
•
• Clogged valves in pump head.
Low Flow and Pressure
• Air leak at pump intake.
• Accumulation of debris inside pump or plumbing.
• Worn pump bearing (possibly accompanied by loud noise).
• Punctured diaphragm.
• Defective motor.
7
Use the following process to adjust shut-o and bypass pressures
*Remove the pressure adjustment screw completely, mark the screw in
PSI.
*Remove the bypass adjustment screw completely, mark the screw in
3.). This will increase the maximum bypass pressure to approximately 67
PSI.
-
3.
Picture 1
water tank
pump
valve outlet
pressure
gauge
Picture 2
1. pressure adjustment
set screw type; 5/64 (2mm)
allen key
2. bypass adjustment
set screw type; 5/64 (2mm)
allen key
8
9
RainHarvest Systems | RainHarvest.com | 800-654-9283 | 092121
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1
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