What’s in the Box
The A4 (Legacy) Pump is shipped with the following contents:
- A4 (legacy) Peristaltic Metering Pump
- Two tube assemblies (one installed, one spare)
- Tube installation tool
- Power Cord – 6 feet
- USB Drive (Operating manual)
- Mounting hardware kit (includes standard mounting brackets and hardware. Optional extended bracket available for purchase separately)
- Suction strainer, PVDF (with “M”, and “B” tube connectors only)
- Discharge injector, PVDF/Aflas with 1/2 psi check (with “M”, and “B” tube connectors only)
Preparation
The A4 (legacy) Pump is designed to withstand outdoor conditions, although it is recommended to locate the pump in a protected enclosure for maximum pump life. A cool, dry location where the unit can be easily monitored is recommended. Special ventilation is not required.
The pump can be mounted on a level flat surface. We recommend using the provided mounting brackets for secure installation. Blue-White also offers a sturdy polyethylene (PE) Wall Shelf to mount the pump.
Piping and Physical Installation
The A4 (Legacy) Pump must be level to ensure pumping accuracy.
If mounting the pump using the mounting bracket, follow these instructions:
- Use the diagram and drawing on the manual (or below) to mount the pump and bracket to a secure location. We recommend mounting the pump at a height where the display and indicator lights are easily visible, and where it can be easily serviced.
- Ensure the bracket is mounted to the pump first using the provided hardware. (Standard and extended brackets attach to pump using same hardware, and hole dimensions are the same Extended brackets part number 72000-380.)
- Ensure location provides enough space for inlet and outlet connections to the pump, and ensure enough space for rear wiring.
Place the pump and secure to the base surface using the appropriate hardware for the base surface.
If mounting the pump to a shelf, be certain the shelf will be able to support the weight of the pump.
Connecting Suction and Discharge Tubing/Piping
A4 (Legacy) Pump tube elements have six (6) options for connections.
“M” 1/2” MNPT connection. When A4 (Legacy) pump is ordered with “M” tubing connections, it will come with Injection Check Valve, and Suction Strainer. Tubing or piping not included.
“B” 1/2” Hose Barb connection. When A4 (Legacy) pump is ordered with “B” tubing connections, it will come with Injection Check Valve, and Suction Strainer. Tubing/hose or piping not included.
“C” Tri-Clamp connection. When A4 (Legacy) pump is ordered with “C” tubing connections, it will not come with Injection Check Valve, Suction Strainer, or tubing.
“Q” Quick Disconnect (Quick disconnect fittings provided separately). When A4 (Legacy) pump is ordered with “Q” tubing connections, it will not come with Injection Check Valve, Suction Strainer, or any tubing. Quick Disconnect fittings must be ordered separately (see accessory options.)
“MB” 1/2” Male BSPT connection. When A4 (Legacy) pump is ordered with “MB” tubing connections, it will not come with Injection Check Valve, Suction Strainer, or any tubing.
Note: We highly recommend installing a check valve on the discharge side of the pump. The check valve can be in the form of an injection check valve, in-line check valve, quick disconnect check valve or similar. When there is a tube leak, the check valve will prevent chemicals from the discharge line to continually feed back into the pump head.
Wiring
Power Wiring
The A4 (Legacy) is powered by 100 to 240VAC, 50/60Hz power. Use the provided 6’ power cord, and attach the cord at the back of the pump.
Caution: Consult a licensed electrician when in doubt about your electrical installation.
Control Wiring
The A4 (Legacy) pump has a labeled terminal box at the rear of the pump. All wiring connections are made via removable terminal blocks.
Signal connection includes:
Input Signals
- Remote Start/Stop Input (Dry or Wet Contact Closure)
- FVS (Flow Verification System) Input
- 4-20mA Input (pump speed control) (V model only)
- 0-10 VDC Input (V model only)
- Pulse Input (AC, Square Wave) (V model only)
Output Signals
- 4-20 mA output (Pump speed – scalable) (V model only)
- (3) Output Alarms (Contact closure rated 1 amp, 125VAC) (Programmable) (V model only)
- (1) Output Alarm (Relay, 6 amp (250VAC) or 5 amp (30 VDC) (Programmable)
- Pulse Output 0-1000Hz (AC, Square Wave) (V model only)
See the below rear panel images and Wiring Chart for information and specifications in connecting to your electrical and control system.
Note: Shielded cables must be used on all signal wiring.
Refer to the instructions in the manual for detailed information.
FAQs
Frequently Asked Questions
A4 (Legacy) Installation
- Are shielded cables “required” or just recommended? what will happen if I used a non-shielded cable?
Shielded cables are required on all signal wiring to ensure consistent and reliable communication between pump and control system.
How does “flooded suction” installation reduce output error due to increased suction lift?Suction conditions will affect output on peristaltic pumps. A suction lift will derate flow by a percentage related to the amount of suction lift. A “flooded suction” or “positive pressure” on the suction side of the pump will minimize or eliminate derated flow conditions.
Can this pump be installed in direct sunlight?Yes, the legacy A4 and the A4S can be installed in direct sunlight.
