MONTAGUE RB Series User manual

INSTRUCTION MANUAL
THE MONTAGUE COMPANY
1830 Stearman Avenue P.O. BOX 4954
HAYWARD,CA 94540-4954
TEL: [phone] FAX: [phone]
Custom Refrigerated
Equipment Bases
MONTAGUE EXTREME CUISINE
MODELS:
RB Series
Keep area around appliances free and clear from combustibles.
PLEASE RETAIN THIS MANUAL
FOR FUTURE REFERENCE.
These instructions should be read thoroughly before attempting installation.
Set up and installation should be performed by qualified installation personnel.

2
CONTENTS
INTRODUCTION ……… 4 SERVICE DIAGNOSIS….……….11
SPECIFICATIONS ……..5 WIRING DIAGRAM ……………...14
INSTALLATION…………6 WARRANTY………………………15
OPERATION…………….8 SERVICE RECORD ……………..17
MAINTENANCE………...9
IMPORTANT
WARNING:
Improper installation, adjustment,
alteration, service or maintenance
can cause property damage, injury
or death. Read the operating
and maintenance instructions
thoroughly before installing or
servicing this equipment.
FOR YOUR SAFETY:
Do not store or use gasoline or
other flammable vapors and
liquids in the vicinity of this or
any other appliance.
INSTRUCTIONS TO BE FOLLOWED IN THE EVENT THE USER SMELLS GAS MUST BE
POSTED IN A PROMINENT LOCATION. THIS INFORMATION MAY BE OBTAINED BY
CONSULTING THE LOCAL GAS SUPPLIER.
SHIPPING DAMAGE CLAIM PROCEDURE
For your protection, please note that equipment in this shipment was carefully inspected
and packed by skilled personnel before leaving the factory. The transportation company
assumes full responsibility for safe delivery upon acceptance of this shipment.
If shipment arrives damaged:
1. VISIBLE LOSS OR DAMAGE—Be certain this is noted on freight bill or express receipt,
and signed by person making delivery.
2. FILE CLAIM FOR DAMAGES IMMEDIATELY—Regardless of the extent of damage.
3. CONCEALED LOSS OR DAMAGE—If damage is unnoticed until merchandise is un-
packed, notify transportation company or carrier immediately, and file “concealed dam-
age” claim with them. This should be done within fifteen (15) days of date that delivery
was made to you. Be sure to retain container for inspection.
We cannot assume responsibility for damage incurred in transit. We will, however, be glad
to furnish you with necessary documents to support your claim.

3
TABLE OF CONTENTS
INTRODUCTION
Description of Under Counter Refrigerators 4
Features of Under Counter System 4
Condensing Unit 4
Refrigerant 4
Electrical Characteristics 4
Standard Components 4
Factory Installed Accessories 4
REFRIGERATION SYSTEM SPECIFICATION 5
INSTALLATION 6
Receipt and Inspection of Equipment 6
Location 6
Leveling 6
Plumbing 7
Electrical Connection 7
OPERATION 8
MAINTENANCE 9
Electrical and Piping Connections 9
Care and Cleaning 9
Cleaning the Cabinet 9
Cleaning the Condenser 9
Cleaning the Gaskets 9
Cleaning Drawer Slides 9
Preventing Blower Coil Corrosion 9
Unit Cooler 10
SERVICE DIAGNOSIS 11
Condensing Units 11
WIRING DIAGRAM 14
STANDARD WARRANTY 15
SERVICE RECORD 17

4
INTRODUCTION
DESCRIPTION OF UNDER COUNTER REFRIGERATORS
The E.S.P. Self Contained air cooled Under Counter Refrigeration System utilizes safe CFC’s and
offers tremendous operating efficiency by using an over sized system. This high operating
efficiency is made through effective use of the condenser coil surface area. The condenser coils on
our units are almost 20% bigger than conventional competitive designs. Complete factory assembly
eliminates on-sight construction competitive designs. Complete factory assembly eliminated
on-sight construction costs of built-up systems by refrigeration technicians and electricians in the
field. The Under Counter System is designed primarily for institutional food service operations
including hospitals, universities, schools, hotels, restaurant, coffee shops, and convenience stores.
Under Counter System pulls fresh air over the compressor bodies to reduce their operating
temperature. Compressor ventilation has become increasingly important because of regulations
effecting the use of R-22 refrigerant.
FEATURES OF UNDER COUNTER SYSTEM
Condensing Unit
A refrigeration condensing unit is a highly sophisticated apparatus. It is with the anticipation that it
will provide many years of trouble-free operation with minimal maintenance. Usually the length of
service life realized from a particular condensing unit is directly proportional to the care with which
the original installation was performed. The correct electrical supply must be provided to the
condensing unit. The voltage at the motor-compressor terminals should be checked during start-up
and units operation under full load to insure a tolerance of plus or minus 10 percent of the name-
plate rating.
Refrigerant
R-22 is used for the Under Counter System.
Electrical Characteristics
Each unit is equipped with 120 Volts. 1 Phase. 60 Hertz power supply.
Standard Components
Each unit consists of hermetic compressors, condenser with heavy duty fan motors, oversized
receivers, factory installed accessories, unit coolers with T-stat solenoid valve, TX valve and
suction line P-Trap.
Factory Installed Accessories
Drier, sight glass, and pressure control.
The E.S.P. Under Counter Systems are tested and assembled under strict quality assurance
procedures. Each unit is tested and charged with R-22 before shipment.

5
REFRIGERATION SYSTEM SPECIFICATIONS
Self-Contained Units Remote Units
Length R-22 H.P. R-22 AMPS
R-22 NEMA
PLUG Length H.P. EVAP BTU BTU LOAD COIL AMPS
Salad Tables: Salad Tables: 36" to 66" 1/4 8.0 5-15P 24" to 54" 1/4* 160 484-1020 3.0 72" to 84" 1/3 12.0 5-15P 60" to 84" 1/3* 320 1111-1478 6.0 96" to 102" 1/3 12.0 5-15P 90" to 96" 1/2* 320 1570-1661 6.0 108" to 114" 1/2 14.0 5-20P Work Top Tables: Work Top Tables: 36" to 66" 1/4 8.0 5-15P 24" to 54" 1/4* 160 367-825 3.0 72" to 84" 1/3 12.0 5-15P 60" to 84" 1/3* 320 917-1183 6.0 96" to 102" 1/3 12.0 5-15P 90" to 96" 1/2* 320 1375-1466 6.0 108" to 114" 1/2 14.0 5-20P Pizza/Sandwich Tables: Pizza/Sandwich Tables: 60" to 66" 1/4 8.0 5-15P 48" 1/4* 160 1424 3.0 84" to 90" 1/2 14.0 5-15P 72" 1/2* 320 2135 6.0 114" to 120" 3/4 16.0 5-20P 96" 3/4* 320 2705 6.0 Pizza/Sandwich Tables: Pizza/Sandwich Tables: 66" to 72" 1/3 12.0 5-15P 54" 1/3* 160 1716 3.0 93" to 99" 1/2 14.0 5-20P 81" 1/2* 320 2574 6.0 Baker's Tables: Baker's Tables: 66" to 72" 1/4 8.0 5-15P 54" 1/3* 160 1053 3.0 93" to 99" 1/3 12.0 5-15P 81" 1/3* 320 1580 6.0
All units are 115 volts, 60 hertz, single phase

6
INSTALLATION
RECEIPT AND INSPECTION OF EQUIPMENT
Inspect Under Counter unit and all accessories shipped for any damage or shortages. Any
damage or shortages should be reported immediately to the delivering carrier. Damaged material
becomes the delivering carrier’s responsibility and it should not be returned to the manufacturer
without prior approval. Do not remove any shipping material until the unit is installed in its
permanent location.
LOCATION
Be sure the location chosen has a floor strong enough to support the total weight of the cabinet
and contents. A fully loaded 72” long model may weight as much as 3000 pounds! Reinforce the
floor as necessary to provide for maximum loading.
For the most efficient refrigeration, be sure to provide good air circulation inside and out.
Inside cabinet: Do not pack refrigerator so full that air cannot circulate.
Outside cabinet: Be sure that the unit has access to ample air. Avoid hot corners and locations
near stoves and ovens.
It is recommended that the unit be installed no closer than 1 inch from any wall. Do not install the
unit near any combustible material or object affected by heat or moisture.
LEVELING
A level cabinet looks better and will perform better because:
1. The drain pan will drain properly.
2. The doors will line up with the frames properly.
3. The cabinet will not be subject to undue strain.
Some models have casters for your convenience, for ease of cleaning underneath and for mobility.
It is important that the unit be installed in a stable condition with the front casters locked before
operating, however.

7
PLUMBING
Self-contained models are standard with a condensate evaporator. If, for some reason, a unit does
not have a condensate evaporator, or the evaporator fails, the unit’s drain line must have an outlet
to an appropriate drainage area or container.
Moisture collecting from improper drainage can create a slippery surface on the floor and a hazard
to employees. It is the owner’s and operator’s responsibility to provide a container for or outlet for
drainage.
ELECTRICAL CONNECTION
Refer to the amperage data on page 3, the serial tag, your local code or the National Electrical
Code to be sure the unit is connected to the proper power source. A protected circuit of the correct
voltage and amperage must be run for connection of the line cord, or permanent connection to the
unit.
Self-contained unit with cord and plug have an ON/OFF switch located directly behind the lou-
vered panel covering the compressor section. Simply turn the switch to ON to begin operation.
The power switch should be turned to OFF and the unit disconnected from the power source
whenever performing service or maintenance functions.
Never operate the unit without the louvered panel in place!
If electrical receptacles are to be mounted in the unit’s backsplash, they must be wired
independently from the existing unit wiring.

8
OPERATION
After turning the ON/OFF switch to ON, the unit’s compressor will begin operating. E.S.P. Under
Counter Refrigerators are designed to maintain an operational temperature of 36°F to 40°F.
Overloading the storage area, restricting the air flow, and continuous opening and closing of the
doors and drawers will hamper the unit’s ability to maintain operational temperatures.

9
MAINTENANCE
ELECTRICAL AND PIPING CONNECTIONS
All electrical connections should be periodically checked to be sure they are tight. Loose
connections contribute to low voltage conditions which can cause motor failure.
Refrigerant connections should be inspected to insure that they have not loosened. Whenever it is
necessary to add refrigerant, a careful leak check of all refrigerant connections should be made.
CARE AND CLEANING
Cleaning the cabinet
The interior and exterior can be cleaned using soap and warm water. If this is not sufficient, try
ammonia and water or a non-abrasive liquid cleaner. When cleaning the exterior, always rub with
the “grain” of the stainless steel to avoid marring the finish. Do not use an abrasive cleaner because
it will scratch the stainless steel.
Cleaning the condenser
In order to maintain proper refrigeration performance, the condenser fins must be cleaned of dust,
dirt, and grease regularly. It is recommended that this be done at least every three months. If
conditions are such that the condenser is totally blocked in three months, the frequency of cleaning
should be increased. Clean the condenser with a vacuum cleaner or stiff brush. If extremely dirty, a
commercially available condenser may be required.
Cleaning gaskets
Door gaskets should be cleaned as required to maintain their ability to seal properly. Do not use
sharp tools or knives to scrape the bellows as this may tear the gaskets and eliminate its ability to
seal. A bristle brush and solution of soap and water should be all that is required to keep the gasket
clean. Do not use full strength degreasing agents on the gasket because they could cause the
gasket to crack and become brittle.
Cleaning drawer slides
Drawer slides should be kept clean and free of food. The slides should be greased as needed with
a “food-zone” approved lubricant.
Preventing blower coil corrosion
To help prevent corrosion of the blower coil, store all acidic items, such as pickles, in sealable
containers. Immediately wipe up all spills of items that are either acids or bases.

10
PRESSURE CONTROL SETTINGS
Factory recommended low-pressure control settings are:
R-22 refrigerators: 68# cut-in and 38# cut out to maintain
approximate interior temperature of 38°F.
Factory recommended high-pressure settings are:
1/2 and 3/4 horsepower units: 450# for manual reset.
UNIT COOLER
Unit cooler should be checked at least once a month for proper defrosting to maintain amount and
pattern of frosting. It is dependent on the temperature of the room, the type of product being stored,
how often new product is brought into the room and the percentage of time the door is open. Also,
if the coil is not defrosting completely, check for faulty defrost heaters.
Under normal usage, maintenance should cover the following items at least once every six months.
1. Tighten all electrical connections.
2. Tighten fan set screws.
3. Clean the coil surface.
4. Check the operation of the control system.
5. Clean the drain pan and check for proper drainage.
6. Check the drain line heaters.

11
SERVICE DIAGNOSIS—CONDENSING UNITS
SYMPTOM CAUSE REMEDY
A. Compressor does not
run.
1. Motor line open.
2. Fuse blown.
3. Tripped overload.
4. Control contacts dirty or jammed in open
position.
5. Piston seized.
6. Frozen compressor or motor bearings.
7. Control in off position because of cold
location.
8. Defective starting component (single
phase compressor only.)
1. Close start or disconnect switch.
2. Replace fuse.
3. See part C.
4. Repair or replace.
5. Remove motor compressor
head. Look for broken valve and
jammed parts.
6. Repair or replace.
7. Use thermostatic control or
move control to warmer location.
8. Locate and replace.
B. Unit short cycles 1. Control differential set too closely.
2. Discharge valve leaking.
3. Motor-compressor overload.
4. Refrigerant shortage.
5. Refrigerant overcharge.
6. Cycling on high pressure.
1. Widen differential.
2. Correct condition.
3. Check for high head pressure,
tight bearings, seized, pistons,
clogged air cooled condenser.
4. Repair leak and recharge.
5. Purge.
6. Check water supply, dirty
condenser or defective fan.
C. Compressor will not
start—hums intermittently
(cycling on overhead) .
1. Improperly wired.
2. Low line voltage.
3. Relay contacts not closing.
4. Open circuit in starting winding.
5. Stator winding grounded.
6. High discharge pressure.
7. Tight compressor.
1. Check wiring against diagram.
2. Checks main line voltage and
determine location of voltage
and drops.
3. Checks by operating manually.
Replace replay if defective.
4. Check stator leads. If leads are
OK, replace stator.
5. Check stator leads. If leads are
OK, replace stator.
6. Eliminate cause of excessive
pressure. Make sure discharge
shut-off valve is open.
7. Check oil level; correct binding.
D. Unit operates long or
continuously.
1. Refrigerant shortage.
2. Control contacts sticking closed position.
3. Dirty condenser.
4. Air in system.
5. Compressor inefficient.
6. Improper wiring.
1. Repair leak and recharge.
2. Clean points or replace control.
3. Clean condenser.
4. Purge.
5. Check valves and piston.
6. Check wiring and correct if
necessary.
E. Fixture temperature too
high.
1. Refrigerant shortage
2. Control set too high.
3. Control wiring loose.
4. Expansion valve or strainer plugged.
5. Compressor inefficient.
6. Expansion valve set too high.
7. Iced or dirty coil.
8. Unit too small.
9. Clogged or small gas lines.
10. Oil logged system.
1. Repair leak and recharge.
2. Reset control.
3. Check wiring to control.
4. Clean or replace.
5. Check valves and pistons.
6. Lower settings.
7. Defrost or clean.
8. Add unit or replace.
9. Clear clogging or increase line
size.
10. Remove excess oil, check
refrigerant. Charge.

12
SERVICE DIAGNOSIS—CONDENSING UNITS
SYMPTOM CAUSE REMEDY
F. Head pressure too high.
1. Refrigerant overcharge.
2. Air in system.
3. Dirty air-cooled condenser.
4. Insufficient water supply.
5. Recirculating cooling air.
6. High side restriction.
7. Head pressure control valve set wrong.
1. Purge.
2. Purge.
3. Clean area around air-cooled
condenser and inspect for
airborne dirt source.
4. Check water valves and inspect
cooler.
5. Seal off unit from other
machines and provide intake
isolated from air outlet.
6. Remove blockage.
7. Readjust.
G. Head pressure too low.
1. Refrigerant shortage.
2. Compressor suction or discharge valves
inefficient.
3. Cold ambient or cold water.
4. Head pressure control valve set wrong or
no heads pressure valve instead.
1. Repair leak and recharge.
2. Clean or replace leaky valve
plates.
3. No remedy, as efficiency is
increased. However, if condens-
ing temperature is below 85°,
expansion valve will not be able
to feed properly and some form
of head pressure control must
be provided,
4. Readjust or install a head
pressure control valve.
H. Noisy Unit
1. Insufficient compressor oil.
2. Tubing rattle.
3. Mounting loose.
4. Oil slugging or refrigerant flood back.
5. Unbalanced fan or defective fan motor.
1. Repair leak and recharge.
2. Bend tubes away from contact.
3. Tighten.
4. Adjust oil level or refrigerant
change. Check expansion valve
for leak or oversized orifice.
5. Replace bent or broken fan
blades. Check motor bearings.
I. Compressor loses oil.
1. Short of refrigerant.
2. Gas-oil ratio low.
3. Plugged expansion valve or strainer.
4. Oil trapping in lines.
5. Short cycling.
6. Superheat too high at compressor suction.
1. Repair leak and recharge.
2. Add 1pt. oil for each 10lbs. of
refrigerant added to factory
charge.
3. Clean or replace.
4. Drain tubing toward compressor.
5. Refer to Part B.
6. Change location of expansion
valve bulb or adjust valve to
return wet gas to compressor.
J. Frosted or sweating
suction line.
1. Expansion valve admitting excess
refrigerant.
1. Adjust expansion valve.
K. Hot liquid line. 1. Shortage of refrigerant.
2. Expansion valve open too wide.
3. Repair leak and recharge.
4. Adjust expansion valve.

13
SERVICE DIAGNOSIS—CONDENSING UNITS
SYMPTOM CAUSE REMEDY
L. Frosted liquid line. 1. Receiver shut-off valve partially closed or
restricted.
2. Clogged dehydrator.
1. Open valve or remove.
2. Replace clogged part.
M. Unit on vacuum. 1. Ice plugging expansion.
2. Plugged expansion valve.
1. Apply hot wet cloth to expansion
valve. If suction pressure now
increases, there is moisture in the
system and a dryer should be in-
stalled in the line.
2. Clean strainer or replace
expansion value.
N. Motor overloads relays
or circuit breaker open.
1. Low voltage during high load conditions.
2. Defective or grounded wiring in motor or
power circuits.
3. Loose power wiring.
4. High condensing temperature.
5. Power line fault causing unbalanced
voltage.
6. High ambient temperature around the
overload relay.
7. Failure of second starter to pull in on
winding system.
1. Check supply voltage for
excessive line drop.
2. Replace compressor motor.
3. Check all connection and
tighten.
4. See corrective steps for high
discharge pressure.
5. Check supply voltage. Notify
power company. Do not start
until fault is corrected.
6. Provided ventilation to reduce
heat.
7. Repair or replace starter or time
delay mechanism.

14

15

16
The State of California enacted the California Safe Drinking Water and Toxic Enforcement Act of 1986, (Prop.
65), which "prohibits any person in the course of doing business from knowingly and intentionally exposing any
individual to a chemical known to the State of California to cause cancer or reproductive toxicity without first giv-
ing clear and reasonable warning to such individuals." The Governor's Scientific Advisory Panel added carbon
monoxide to the list of hazardous chemicals known to cause reproductive harm.
In order to establish full compliance with Proposition 65, we attached a yellow warning label to each gas fired unit
manufactured by the Montague Company.
Carbon monoxide would not be present in concentrations that would pose a "significant risk" to the consumer
when the equipment is installed, operated and maintained as follows:
1. Installed in accordance with all local codes, or in the absence of local codes, with the current
National Fuel Gas Code Z223.1.
2. Installed under a properly designed and operating exhaust hood.
3. Connected to the type of gas for which the unit is equipped.
4. Proper appliance pressure regulator installed on the gas supply line and adjusted for the manifold pressure
marked on the rating plate.
5. Adequate air supply to the unit.
6. The equipment is operated in the manner intended using the proper utensil for that type of appliance.
7. Keep the equipment clean and have it checked periodically.
8. Burner air adjustments, mechanical maintenance and repairs should be performed by qualified
service personnel.
If the equipment is not installed, operated and maintained in accordance with the above, concentrations of car-
bon monoxide in excess of the established limits could present in the kitchen environment.
ALL PERSONNEL IN THE WORKPLACE WHO MAY BE SUBJECT TO ANY EXPOSURE OF CARBON
MONOXIDE MUST BE WARNED OF SUCH POSSIBLE EXPOSURE. THIS WARNING SHOULD BE
CONVEYED IN A MANNER SO THAT IT IS CLEARLY UNDERSTOOD BY THE EMPLOYEE, AND
THE EMPLOYEE SHOULD BE ASKED IF IN FACT HE OR SHE UNDERSTANDS THE CORRECT
METHOD OF OPERATION OF THE EQUIPMENT AND THAT A RISK OF EXPOSURE EXISTS IF THE
EQUIPMENT IS OPERATED IMPROPERLY.
The MONTAGUE COMPANY
1830 Stearman Avenue, P.O. Box 4954 Hayward, CA 94540-4954
WARNING
If not installed, operated and maintained
in accordance with the manufacturer's
instructions, this product could expose
you to substances in fuel or in fuel
combustion which can cause death or
serious illness and which are known to
the State of California to cause cancer,
birth defects or other reproductive harm.

17
IMPORTANT
When ordering parts, to eliminate mistakes and facilitate delivery, always give
the following information:
Serial No. _____________________________________________
Model No. _____________________________________________
Change No. ____________________________________________
Name & No. of Part
Model No. Change No. Serial No.
REFRIGERATED BASE ID NAME PLATE
The Montague Company
1830 Stearman Avenue
P.O. Box 4954
Hayward, CA 94540-4954 P/N 7055-6 2/02