Installation

What’s in the Box 

The A4S Pump is shipped with the following contents: 

• A4S Multi-Diaphragm Metering Pump 
• Two tube assemblies (one installed, one spare) 
• Tube installation tool  
• Power Cord (if ordered) 
• 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 A4S 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 A4S Pump must be level to ensure pumping accuracy. 

If mounting the pump using the mounting bracket, follow these instructions: 

1. 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. 
2. 
   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.) 
3. Ensure location provides enough space for inlet and outlet connections to the pump, and ensure enough space for rear wiring.  
4. 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 

A4S Pump tube elements have five (5) options for connections.   

“M” 1/2” MNPT connection.  When A4S 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 A4S 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 A4S 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 A4S 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 A4S 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 into the pump head. 

Wiring 

Power Wiring 

The A4S 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.  

A removable power cord is included if the pump is ordered with either a “4” 115V 50/60Hz-NEMA 5/15 plug(US), or a “5” 220V 50/60Hz-CEE 7/V11plug.  See accessories for alternate power cord options (ordered separately.) If using a power cord not provided by Blue-White, the cord must be IEC C13 rated at 250 volts. 

Caution: Consult a licensed electrician when in doubt about your electrical installation.  

Control Wiring 

The A4S pump has six (6) M12 male connectors (5 pin) on the back of the pump for connection to signal wiring.   

Connection to the M12 connectors must be accomplished with shielded and insulated M12 cables with a 250VAC voltage rating. (M12 cables are not included with the pump. See accessories or purchase separately.) 

Signal connection includes: 

Input Signals 

• Remote Start/Stop Input (Dry Contact Closure) 
• Auto-Prime (Secondary Input – Dry Contact) 
• FVS (Flow Verification System) Input 
• 4-20mA Input (pump speed control) 
• Pulse Input (AC, Square Wave) 

Output Signals 

• 4-20 mA output (Pump speed – scalable) 
• (3) Output Alarms (Contact closure rated 1 amp, 125VAC) (Programmable) 
• (1) Output Alarm (Relay, 6 amp (250VAC) or 5 amp (30 VDC) (Programmable) 
• Pulse Output 0-1000Hz (AC, Square Wave) 

Communications Wiring 

• Ethernet and Modbus connections are made via the Ethernet port on the rear of the pump. 
• Profibus connection is made via the M12 Profibus connector at the rear of the pump. 

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