Hobart RO-150 User Manual

WATER TREATMENT

SOLUTIONS

REVERSE OSMOSIS SYSTEM

MODEL

RO-150

INSTRUCTION
MANUAL

701 S. RIDGE AVENUE - TROY, OHIO 45374-0001
F25054 (January 2004)

TABLE OF CONTENTS

GENERAL ...............................................................................-3-

Unpacking............................................................................-3-

Included in RO-150 Filtration System .......................................................-3-

Required Tools ........................................................................-3-

Required Hardware ....................................................................-3-

INSTALLATION ...........................................................................-4-

Mounting Location Requirements ..........................................................-4-

Mounting the RO-150 ...................................................................-4-

Water Supply Requirements ..............................................................-5-

Plumbing Connections ..................................................................-5-

Push Type Fitting Connections ............................................................-6-

Water Supply Connection ................................................................-6-

Storage Tank Connection ................................................................-6-

Drain Connection ......................................................................-7-

Equipment Connection ..................................................................-7-

Sampling Line Connection ...............................................................-8-

Electrical Requirements .................................................................-8-

OPERATION .............................................................................-9-

System Start Up .......................................................................-9-

MAINTENANCE..........................................................................-10-

Component Location ..................................................................-10-

Testing Efficiency of RO Membrane.......................................................-10-

Releasing Water Pressure ..............................................................-11-

Restarting the System .................................................................-11-

Pre-Filter Replacement.................................................................-11-

RO Membrane Replacement ............................................................-11-

Post Neutralizing Filter Replacement......................................................-11-

RO-150 Flow Diagram .................................................................-12-

Component Function ..................................................................-13-

REPLACEMENT PARTS ...................................................................-14-

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Installation, Operation and Care of

RO-150 Reverse Osmosis System

SAVE THESE INSTRUCTIONS

GENERAL

The Hobart RO-150 filter system is designed for foodservice equipment where high quality water is essential. The
Hobart RO150 meets low water usage demands for steamers, combi-ovens, proofers, deck & rack ovens, and
misting systems. Ensure that the water demand of the equipment does not exceed six gallons per hour or a total
draw down of 13.5 gallons.

NOTE: The standard storage tank size is 20 gallon. Other sizes of storage tanks are available (up to 80 gallon).
NOTE: The RO-150 is intended only for water feeding the cooking equipment boiler or generator. A separate

condensate line not treated by the RO-150 must be installed on equipment if required.
Filter cartridge replacement is recommended at least every 4 - 6 months for moderate to low usage and 90 days

for high usage. The RO membrane should be replaced annually or when the removal of Total Dissolved Solids ­TDS becomes less than 80% efficient (determined by comparison testing of water supply and product water).

UNPACKING

This water filter system was inspected before leaving
the factory. The transportation company assumes full
responsibility for safe delivery upon acceptance of
the shipment. Immediately after unpacking, check for
possible shipping damage. If the water filter system
is found to be damaged, save the packaging material
and contact the carrier within 15 days of delivery.

INCLUDED IN RO-150 FILTRATION SYSTEM

• Reverse osmosis filtration system assembly
with supplied filters, cartridges and 24VAC
transformer.

• 20 Gallon storage tank (13 gallon capacity)*.

• 3/8" Push on ball valve

• 3/8" to 1/4" Push on tee

• 1/4" Ball valve

• 10' - 3/8" LLDPE John Guest tubing

• 10' - 1/4" LLDPE John Guest tubing

• 3/8" Plastic ferrules and stainless steel stiffening
inserts

• Filter wrench

* The RO-150 filtration system can be purchased
without a storage tank.

REQUIRED TOOLS

• Spirit Level

• PVC pipe cutter, razor blade tubing cutter or
sharp razor knife

• Electric drill

•Marker

• Air pressure gauge capable of measuring 10-60
psi.

REQUIRED HARDWARE

• Connection fitting to water supply with 3/8"
compression fitting

• Connection fitting to equipment with 3/8"
compression fitting

• Teflon tape

• Two 3/16" diameter mounting screws at least 1­1/4" in length.

• Appropriate wall anchor hardware for 3/16"
screws

-3-

INSTALLATION

MOUNTING LOCATION REQUIREMENTS
CAUTION: Do not mount to equipment.

1. The filter system must be mounted on a sturdy
support structure or wall and must be level.

2. Allow a minimum of ten inches clearance
around the left and right sides and 14 inches
clearance from the bottom of the system for
routine maintenance and servicing.

3. Locate the RO filter system and storage tank
near the equipment it services.

DIMENSIONS OF SYSTEM SHOWN

NOTE: The shorter the distance between the RO
filter system and the equipment, the lower the water
delivery line pressure drop.

4. Ensure there is an open drain nearby to drain
waste water produced by the RO system. Most
commonly this is the same drain used by the
equipment the RO filter system is servicing.

B. Level pre-filter head against mounting

structure.

C. Mark the two mounting hole locations.

2. Drill mounting holes to the required diameter
(depends on wall anchors being used).

3. Install two 3/16" mounting screws at least 1-1/4"
in length in the marked locations using the
appropriate wall anchors. Screw in the mounting
screws leaving a 1/8"-1/4" gap. Lift the pre-filter
head assembly and install over mounting
screws. Slide pre-filter head assembly into
place then securely tighten the mounting
screws.

CAUTION: Do not plug in the transformer at this
time.

4. Place the transformer in the space provided to
the right of the permeate pump.

5. Connect the transformer 24V output to the
wiring harness.

A. Route transformer output wiring under right

side of bracket and connect to plug located
on the left side of filter system near high
pressure switch.

6. Insert filter cartridge into the pre-filter housings.
A. Verify that the filter cartridge being installed

matches the labeling on the bracket.

B. For each pre-filter, ensure the O-ring is in

place on pre-filter housing and hand
tighten filter housing onto the pre-filter
head.

5. Make sure 120V electrical service is within six
feet of the RO mounting location.

6. Do not install the RO filter system where it will
be exposed to hot air or steam exhaust.

7. The filter system must be protected against
freezing. Failure to do so could result in
breakage of the filter housing and water
leakage.

MOUNTING THE RO-150
NOTE: The Hobart RO-150 can be mounted on a

wall or other stable surface that will support its wet
weight of 30 lbs. When mounted to a wall, the
mounting hardware used must be able support its full
weight and withstand the additional forces applied
during pre-filter replacement.

Wall Mounting

1. Remove the pre-filters from the filtration system.
A. Lift the pre-filter head assembly to the

desired location.

-4-

WATER SUPPLY REQUIREMENTS
NOTE: Install the RO-150 in the cold water line only. Installation of the water filter system in a hot water line can

damage the filter housing. System performance varies with the incoming water supply temperature. Optimum
performance is achieved when water temperature is 70° F. For each 10° F drop in water temperature, a decrease
in water production of 10% will be observed. A larger storage tank may be required when the water temperature is
less than 55° F.

NOTE: The following are recommended inlet water supply parameters. Exceeding these parameters may
decrease system performance or result in more frequent filter changes. Most municipal water supplies will meet
these conditions with the exception of water hardness. In cases where water hardness exceeds the maximum
recommended levels, life of the RO membrane may be shortened. Proper system performance checks will
determine if the membrane needs replacement.

WATER PARAMETERS

Inlet Water Supply TDS < 2,000 ppm
Hardness < 10 grains (171 ppm)
Iron < 0.2 ppm
Manganese < 0.05 ppm
Turbidity < 5 NTU
pH 5 -10
Free Chlorine < 2 ppm
Hydrogen Sulfide None Allowable
Feed Water Temperature 40 - 100° F
Feed Water Pressure 20 - 125 psi

PLUMBING CONNECTIONS
WARNING: PLUMBING CONNECTIONS MUST COMPLY WITH APPLICABLE SANITARY, SAFETY AND

PLUMBING CODES.

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