ADS 088-1048 Spray Arm Pressure Testing Tool Instruction Manual

: June 15, 2024
: aDS

Table of Contents

ADS 088-1048 Spray Arm Pressure Testing Tool
Product Information
Product Usage Instructions
SAFETY CAUTION
How to Use the Pressure Tester for Low Temp Machines
Needle Indications for Low Temp Machines
How to Use the Pressure Tester for Conveyor Or HT-25
Needle Indications for Conveyor and HT Machines
Spray Arm Pressure Rationale
Order Parts
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

ADS 088-1048 Spray Arm Pressure Testing Tool

Product Information

Product Specifications:

Product Name: Routine & Preventative Maintenance Spray Arm Pressure Testing Tool
Model Number: 088-1048
Compatibility: Temp machines
Features: Pressure gauge for measuring spray arm pressure

Product Usage Instructions

Pressure Testing for Low Temp Machines:

Remove one of the lower spray arm end caps and replace it with the tester end plug.
Run tubing through the sump area with the gauge outside of the machine.
Refill the machine and close the door to start the pump.
Read pressures during wash and rinse cycles, recording the data.
A correct reading would show a steady needle at full spray arm pressure.

Reading Needle Indications for Low Temp Machines:

Steady pressure at 18-20 psi: The pump is fully charged (Full Spray Arm Pressure).
Steady pressure at 14-15 psi: Indicates a partially clogged impeller or worn spray tips.
Fluctuating pressure in the 5-10 psi range: Indicates low water levels in the machine.
Fluctuating pressure near 18-20 psi: Indicates additional water is needed to reach full spray arm pressure.

Pressure Testing for Conveyor Or HT-25:

Show attachment of the adapter to the pumped rinse arm or wash arm tube.
Hold the gauge outside the conveyor during operation or remove it through the scrap overflow door of HT-25 to read.

Reading Needle Indications for Conveyor and HT Machines:

Upper wash arm pressure: Approx 9-10 psi
Lower wash arm pressure: Approx 5-6 psi
Water Curtain (Pumped Rinse) on conveyor: Approx 2-3 psi

Spray Arm Pressure Rationale:

HIGH PRESSURE/LOW VOLUME:
For low-temperature chemical sanitizing dishmachines, the lower spray arm delivers high pressure (18-20 psi) with a low volume of water. Wash arm pressures below 12-15 psi may not effectively remove soils.

Frequently Asked Questions (FAQ):

Q: How do I order parts for the Pressure Testing Tool?
A: To order parts, you can request the following items:

Low Temp Pressure Tool
Conveyors Or HT-25 Tool
084-6208 End Plug

SAFETY CAUTION

You must wear approved safety eyewear before connecting chemicals. Read the chemical manufacturer’s MSDS sheets. Chemicals can damage or corrode plumbing and stainless parts of the dish machine. Do not run chemical lines over controls or plumbing. Always secure chemical lines and check regularly for leaks. If not properly handled, chemicals can cause serious bodily injury. In the event of chemical contact with skin or eyes; wash immediately with fresh water and seek medical attention.

One of the most useful tools that can be used in evaluating a dish machine’s performance is the spray arm pressure tester. Since the machine and pump parts cannot be viewed during operation, a pressure gauge can act as a window to show the pump and spray system’s performance. Observing the movement and position of the needle will indicate certain conditions. Rotating arms will not turn when the tool is connected for testing of pressure. This will not affect the readings for pump and spray arm pressures.

How to Use the Pressure Tester for Low Temp Machines

Remove one of the lower spray arm end caps and replace it with a tester end plug
Run tubing through the sump area with the gauge outside of the machine. Then refill the machine.
Close the door to start the pump, read pressures during the wash and rinse record data. The correct reading would be a steady needle at full spray arm pressure. The machine can be diagnosed for several problems discussed in the following examples.

Needle Indications for Low Temp Machines

Reading Needle Indications for Low Temp Machines

Steady pressure at 18-20 psi throughout the cycle indicates the pump is fully charged (Full Spray Arm Pressure)
Steady pressure through the cycle at 14-15 psi indicates a partially clogged impeller, this can also indicate spray tips that are worn and allow too much water to pass through the spray arm.
Widely fluctuating pressure in the 5-10 psi range indicates very little water in the machine
Fluctuating pressure at or near 18-20 psi indicates an additional .05 to .10 of a gallon is needed to reach full spray arm pressure.

How to Use the Pressure Tester for Conveyor Or HT-25

Showing the attachment of the adapter to the pumped rinse arm
Attached to a wash arm tube
Hold the gauge outside the conveyor during operation
Showing attachment to HT-25 wash arm
Remove the gauge through the scrap overflow door of the HT-25 to read

Rotating arms will not turn when the tool is connected for testing of pressure. This will not affect the readings for pump and spray arm pressures.

Needle Indications for Conveyor and HT Machines

Reading Needle Indications for Conveyor and HT Machines

Upper wash arm pressure approx 9-10 psi
Lower wash arm pressure approx 5-6 psi
The water Curtain (Pumped Rinse) on the conveyor is approx 2-3 psi

Spray Arm Pressure Rationale

HIGH PRESSURE/LOW VOLUME
For “Low Temp” chemical sanitizing dish machines (batch-type design), the lower spray arm delivers high pressure (18-20 psi) at a relatively low volume of water. More pressure is not better. Higher pressures than these tend to lift certain dishware from the rack. When wash arm pressures drop below 12-15 psi at the lower arm, the mechanical action of the water is insufficient for removing most soils.
LOW PRESSURE/HIGH VOLUME
For conveyors or high-temperature dish machines (holding tank design), the volume of spraying water is greater and consequently, the spray pressures must be lower, or nothing will stay in the machine. The lower wash arm is typically about 6 psi to avoid lifting the dishware. The effect is high mechanical action from the high volume of water pouring over the dishware. An analogy would be the difference between standing in the ocean and being washed over by high-volume waves vs. standing in a shower with high-pressure streams but low water volume. Both can be cleansing.