HRO-500 AND HRO-500C
REVERSE OSMOSIS SYSTEM
- NOTICE -
This Manual is prepared for the use of trained Hobart Service
Technicians and should not be used by those not properly
qualified.
This manual is not intended to be all encompassing. If you have
not attended a Hobart Service School for this product, you should
read, in its entirety, the repair procedure you wish to perform to
determine if you have the necessary tools, instruments and skills
required to perform the procedure. Procedures for which you do
not have the necessary tools, instruments and skills should be
performed by a trained Hobart Service Technician.
The reproduction, transfer, sale or other use of this Manual,
without the express written consent of Hobart, is prohibited.
This manual has been provided to you by ITW Food Equipment
Group LLC ("ITW FEG") without charge and remains the property
of ITW FEG, and by accepting this manual you agree that you will
return it to ITW FEG promptly upon its request for such return at
any time in the future.
INSTALLATION INSTRUCTIONS
A product of Hobart Service 701 S. Ridge Ave Troy, OH 45374
F45580 Rev A. (1015)
INSTALLATION INSTRUCTIONS
HRO-500 AND HRO-500C REVERSE OSMOSIS SYSTEM
INTRODUCTION
Fig. 1
Features
• Four stage reverse osmosis system utilizing
standard incoming feed water pressure.
• No electricity or feed-side pump required.
• Ideal for high-volume, line-pressure applications.
• No hydraulic shut-off valve required.
•
Features a permeate pump powered by the
hydraulic energy of the brine water.
• The permeate pump optimizes system efficiency by
keeping the pressurized storage tank close to line
pressure, which allows large draws on demand.
• Dual carbon block or dual chloramines reduction
prefilters.
• Carbon/calcite postfilter.
• Compact wall-mounted frame. Easy to install with
quick connect fittings.
• Manufactured in the USA.
System Specifications
Model HRO-500 HRO-500C
Capacity* 500 gpd
Membrane (1) 3.2” x 18”
Prefilter (2) 20” Carbon block (2) 20” Chloramines reduction
Postfilter 12” Carbon/Calcite
Dimensions 28”H x 14”W x 7”D
Weight 28 lbs.
* Based on membrane performance after 24 hours, 77°F, 500 ppm TDS at 65 psi. Membrane performance
may vary ±15%.
Operating Specifications
Minimum Feed Pressure 25 psi
Operating Pressure 40-80 psi
Operating Temperature 40°F - 100°F
© HOBART SERVICE 2015
Page 1 of 3
F45580 Rev. A (October 2015)
Operating Specifications
Max Total Dissolved Solids 2,000 ppm
Max Hardness <15 grains
Max Chlorine <1.0 ppm
pH Range 3-10
SDI <5.0
Turbidity <1.0 NTU
Hydrogen Sulfide, Manganese, Iron 0 ppm
STARTUP PROCEDURE
1. System Preparation
A. Open product vent valves (1,Fig. 2) and brine valve (1,Fig. 3). The vent valves are the white bodies with
blue handles.
Fig. 2
Fig. 3
B. Verify feed (4, Fig. 3), drain (2, Fig. 3) , and product (3, Fig. 3) connections are correctly routed.
C. Close tank valve.
2. Brine-to-Product Ratio / Initial Membrane Flush The brine control valve has been pre-set at the factory. The dot
on the handle should match the dot on the frame. The following procedure will confirm the brine to product ratio
and flush the membrane.
A. Connect temporary drain tubing to product (3, Fig. 3) and brine vent valves (1, Fig. 3). Drain tubes should
be as short as possible for accurate brine and product flow rates.
B. Open feed valve (4, Fig. 3) and wait for air in the prefilters and membrane to be displaced.
C. Measure the flow rate from the product vent valve (3, Fig. 3) for 10-15 mins. It should be approximately 3
times the flow rate from the brine vent valve (1, Fig. 3).
D. Slowly open or close the Brine Control Valve Fig. 4, underside of frame, to adjust the ratio.
F45580 Rev. A (October 2015)
Page 2 of 3
Fig. 4
E. Allow water to flow from the temporary tubes until the membrane is flushed and TDS is stable.
F. Close the feed valve. Close the vent valves. Remove the temporary drain tubing.
3. Verify permeate pump performance.
A. Open feed valve.
4. Flush postfilter.
A. After tank has been filling for 10 minutes, open outlet to flush postfilter.
B. Close outlet and allow tank to fill.
C. Check for leaks after tank is full and pump has stopped.
Fig. 5
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F45580 Rev. A (October 2015)
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