MICROMATIC MMPP4302-R User manual

MMPP4302-R
MMPP4302-PKG-R
MMPP4303-PKG-R
MMPP4303-PKG-3-R
MMPP4305-PKG-R
MMPP4305-PKG-3-R
MMPP4307-PKG-R
MMPP4307-PKG-3-R
MMPP4307-PKG-4-R
REMOTE POWER PACK
SERVICE MANUAL
v1.0

2| REMOTE POWER PACK SERVICE MANUAL MICROMATIC.COM | 866-327-4159

MICROMATIC.COM | 866-327-4159 REMOTE POWER PACK SERVICE MANUAL |3
EQUIPMENT SPECIFICATIONS .............................................................................. 4-5
INSTALLATION.......................................................................................................... 6-8
MAINTENANCE............................................................................................................ 8
CHANGING GLYCOL PUMP........................................................................................ 9
REPLACING MOTOR.................................................................................................. 10
REPLACING THERMOSTAT...................................................................................... 10
TROUBLESHOOTING................................................................................................. 11
SPARE PARTS............................................................................................................. 12
WIRING DIAGRAMS................................................................................................... 13
WARRANTY INFORMATION..................................................................................... 15
TABLE OF CONTENTS

4| REMOTE POWER PACK SERVICE MANUAL MICROMATIC.COM | 866-327-4159
EQUIPMENT SPECIFICATIONS
MODEL MMPP4302-R MMPP4302-PKG-R MMPP4303-PKG-R MMPP4303-PKG-3-R MMPP4305-PKG-R
Type Air Cooled Air Cooled Air Cooled Air Cooled Air Cooled
BTUs* 3,600 3,600 5,100 5,100 7,250
Compressor HP 1/2 1/2 3/4 3/4 1
Glycol Pumps 1 2 2 3 2
Pump Type Rotary Vane Rotary Vane Rotary Vane Rotary Vane Rotary Vane
Pump GPH 80 80 80 80 80
Pump Motor HP 1/3 1/3 1/3 1/3 1/3
Pump Inlet/Outlet Barbs 9.52mm (3/8”) 9.52mm (3/8”) 9.52mm (3/8”) 9.52mm (3/8”) 9.52mm (3/8”)
Plug Type 5-15P 5-15P 6-15P 6-15P 6-15P
Condensing Unit
Electrical Requirement 115V / 20A 115V / 20A 208/230V / 20A 208/230V / 20A 208/230V
Refrigerant R134a R134a R134a R134a R134a
Refrigerant
Running Pressures 18 (low) / 140 (high) 18 (low)
140 (high)
18 (low)
140 (high)
18 (low)
140 (high)
18 (low)
140 (high)
Dimensions
L x W x H Including
pump(s) and motor(s)
30" x 18"x 29.75” 30” x 18”x 29.75” 30” x 18”x 29.75” 30" x 18" x 29.75" 37.12" x 18.75" x 31.15"
Weight (lbs) 71 kg / 157 lbs 71 kg / 157 lbs 80 kg / 175 lbs 91 kg / 200 lbs 98 kg / 215 lbs
Bath Capacity (gal) 11.5 gal / 43.5 L 11.5 gal / 43.5 L 11.5 gal / 43.5 L 11.5 gal / 43.5 L 11.5 gal / 43.5 L
Bath Insulation
Thickness 1.5" 1.5" 1.5" 1.5" 1.5"
Inlet Water Pressure NA NA NA NA NA
Water Inlet & Outlet Fitting NA NA NA NA NA
Minimum Water Pipe Size NA NA NA NA NA
Approval ETL Listed ETL Listed ETL Listed ETL Listed ETL Listed
*Rated at 20° F evaporator temperature and 90° F ambient temperature. †.3GPM, water is only used when the temperature of the condenser rises high enough
to open the cooling inlet valve. This is approximately 40% of the operating time depending on the ambient temperature and usage. Condenser Inlet Water
Temperature: Minimum 45° F / Maximum 80° F

MICROMATIC.COM | 866-327-4159 REMOTE POWER PACK SERVICE MANUAL |5
EQUIPMENT SPECIFICATIONS
MODEL MMPP4305-PKG-3-R MMPP4307-PKG-R MMPP4307-PKG-R MMPP4307-PKG-4-R
Type Air Cooled Air Cooled Air Cooled Air Cooled
BTUs* 7,250 11,500 11,500 11,500
Compressor HP 1 1 1/2 1 1/2 1 1/2
Glycol Pumps 3 2 3 4
Pump Type Rotary Vane Rotary Vane Rotary Vane Rotary Vane
Pump GPH 80 80 80 80
Pump Motor HP 1/3 1/3 1/3 1/3
Pump Inlet/Outlet Barbs 9.52mm (3/8”) 9.52mm (3/8”) 9.52mm (3/8”) 9.52mm (3/8”)
Plug Type 6-15P 6-15P 6-15P 6-15P
Condensing Unit
Electrical Requirement 208/230V /20A 208/230V /20A 208/230V / 20A 208/230V / 20A
Refrigerant R134a R404a R404a R404a
Refrigerant
Running Pressures 18 (low) / 140 (high) 55 (low)
260 (high)
55 (low)
260 (high)
55 (low)
260 (high)
Dimensions
L x W x H Including
pump(s) and motor(s)
37.12” x 18.75” x 31.15” 38” x 20” x 36” 38” x 30” x 36” 30" x 18" x 29.75"
Weight (lbs) 131 kg / 290 lbs 134 kg / 295 lbs 134 kg / 295 lbs 91 kg / 200 lbs
Bath Capacity (gal) 11.5 gal / 43.5 L 11.5 gal / 43.5 L 11.5 gal / 43.5 L 11.5 gal / 43.5 L
Bath Insulation
Thickness 1.5" 1.5" 1.5" 1.5"
Inlet Water Pressure NA NA NA NA
Water Inlet & Outlet Fitting NA NA NA NA
Minimum Water Pipe Size NA NA NA NA
Approval ETL Listed ETL Listed ETL Listed ETL Listed
*Rated at 20° F evaporator temperature and 90° F ambient temperature. †.3GPM, water is only used when the temperature of the
condenser rises high enough to open the cooling inlet valve. This is approximately 40% of the operating time depending on the ambi-
ent temperature and usage. Condenser Inlet Water Temperature: Minimum 45° F / Maximum 80° F

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INSTALLATION AND OPERATION
1. Remove packaging from the unit in the vicinity of the area where it will be installed.
2. Carefully lift the unit into the desired position.
NOTE: DO NOT PUSH OR SLIDE UNIT – Damage will be caused to the legs if the unit
is pushed into position.
PLACEMENT
• It is not recommended to install a power pack on top of a walk in cooler.
• It is not recommended to install a power pack outside.
• Always ensure a minimum clearance of 18 inches above and in front of a power pack. This allows
   forproperairowaroundunit.
• Ambient operating temperature range is 50-90° F for all air cooled models.
• Power pack must be wired to a ground fault circuit interrupter per UL guidelines.
BATH INSTALLATION STEPS
(Assure tower connections are complete.)
1. Remove the refrigeration deck from the unit.
2. Inspect the glycol tank for any debris.
3. Connect one of the glycol lines from the trunk line to the pump outlet. Insulate any exposed tubing.
NOTE: In units with more than one pump, connect a glycol line to each pump outlet.
4. Connect the second glycol line from each circuit to the glycol bath inlet.
5. Fill the glycol bath with Micro Matic Polar Flo®glycol solution:
• MMPP4302-R, MMPP4302-PKG-R, MMPP4303-PKG-R, MMPP4303-PKG-3-R.
Mix: 2 ½ parts water to 1 part glycol.
• MMPP4305-PKG-R, MMPP4305-PKG-3-R, MMPP4307-PKG-R, MMPP4307-PKG-3-R, MMPP4307-PKG-4-R
Mix: 7 parts distilled water to 5 parts glycol.
Fillbathtothelevelofthelllineontheglycollevelindicator.
6. Replace the refrigeration deck.
7. Connect electrical outlets capable of handling the required voltage loads. This should be carried out by suitably trained
personnel and must comply with all state and national codes.
8.Glycollevelwillfallasglycolispumpedthroughtheglycollines.Continuetollthebathtothefulllevelontheglycol
level indicator. Series MMPP4305 and MMPP4307 pumps must be circulating before compressor is started.
9. Inspect for any leaks.
NOTE: To adjust the glycol temperature, please see Adjusting Electronic Thermostat.

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CONDENSING UNIT INSTALLATION STEPS
NOTICE - INSTALLATION AND SERVICE OF THE REFRIGERATION AND ELECTRICAL COMPONENTS
MUST BE PERFORMED BY A REFRIGERATION MECHANIC OR LICENSED ELECTRICIAN.
DANGER – EQUIPMENT MUST BE PROPERLY GROUNDED. IMPROPER OR FAULTY HOOK-UP OF
ELECTRICAL COMPONENTS OF THE REFRIGERATION UNITS CAN RESULT IN SEVERE INJURY OR
DEATH. ALL ELECTRICAL WIRING HOOK-UPS MUST BE DONE IN ACCORDANCE WITH ALL APPLI-
CABLE LOCAL, REGIONAL, OR NATIONAL STANDARDS.
The condensing unit should be located at a minimum of 18” between the face of the coil (air intake)
and a wall or other vertical obstruction and have 24” clearance on the sides and air exhaust of the unit.
If mounted indoors, room should be provided with fans designed to move 1000 CFM of air per ton of
refrigeration.
ELECTRICAL – Electrical power supply must match the condensing unit power requirements indicat-
edontheunitdataplate.Alleldwiringshouldbedoneinaprofessionalmanner,inaccordancewith
all governing codes. Double check all wiring connections, including factory terminals, before startup of
condensing unit.
REFRIGERANTPIPING–Thecondensingunitmustremainsealeduntilpipingiscompleteandnal
connections are ready to be made. Use only refrigeration grade copper tubing (ACR), Type “L”, bright
annealed, dehydrated, and properly sealed against contamination. Take caution to keep refrigeration
tubing clean and dry prior to installation.
Suction lines should slope down ½” for each 10 feet of horizontal run towards the compressor. If
any portion of the suction line rises above the exit elevation of the evaporator (bath), p-type oil traps
should be located at the base of each suction riser for proper oil return to the compressor. A properly
sizedlterdrierandsightglassmustbebrazedontotheliquidsideofthesystemdownstreamofthe
receiver.
When brazing, dry nitrogen MUST be passed through the lines at low pressure to prevent scaling and
oxidationinsidethetubingandttings.Alluxmustberemovedfromjointsafterbrazing.
Fifteen percent silver brazing wire should be used on all copper to copper connections and 45% silver
brazing wire on all dissimilar metal connections.
If pressure control and fan cycle control have not been connected to the appropriate ports on the ser-
vice valves, make those connections now. Make sure the pressure control settings are appropriate for
the refrigerant being used.

8| REMOTE POWER PACK SERVICE MANUAL MICROMATIC.COM | 866-327-4159
MAINTENANCE
1. Inspect the unit monthly to ensure that the glycol level is maintained to the full level.
2. If the level is low replace with a Micro Matic Polar Flo®glycol solution:
• MMPP4302-R, MMPP4302-PKG-R, MMPP4303-PKG-R, MMPP4303-PKG-3-R.
Mix: 2 ½ parts water to 1 part glycol.
• MMPP4305-PKG-R, MMPP4305-PKG-3-R, MMPP4307-PKG-R, MMPP4307-PKG-3-R, MMPP4307-PKG-4-R,
Mix: 7 parts distilled water to 5 parts glycol.
3. If there is evidence of ice build up in the unit, allow the ice to melt and replace all the water/glycol solution with a
fresh solution mixed per above instructions.
4. The glycol/water solution should be changed approximately every 18 months. In regions of high humidity
considerations should be given to replacing the solution on an annual basis.
5.Checkandcleanthecondensernseverysixty(60)days.
6.Checkthatthereisadequateairowthroughtheunitensuringenoughspaceallaroundandthatthereareno 
obstructionsinfrontoftheairowvents.
7. Check the condition and effectiveness of the trunk line insulation.
8. At regular intervals, to be determined by the owner, the unit should be checked for electrical safety.
When all refrigeration line connections have been made, the complete system should be leak checked.
EVACUATION AND START UP - A vacuum of 250 microns or less must be pulled to properly dehydrate
the system.
DO NOT USE THE SYSTEM COMPRESSOR AS A VACUUM PUMP.
DO NOT OPERATE THE COMPRESSOR WHILE THE SYSTEM IS IN A VACUUM.
Open all condensing unit service valves and relieve system pressure. Also, plug in the bath to energize
the liquid line solenoid valve and glycol motors. GLYCOL MUST BE CIRCULATING THROUGH THE
HEAT EXCHANGER IN THE BATH BEFORE THE REFRIGERATION SYSTEM IS ENERGIZED. Connect
the vacuum pump to the low and high side of the system. Pull a vacuum of at least 250 microns.
When 250 microns is reached, close the vacuum lines and charge the system with the proper refriger-
ant until the sight glass is full.
Close the low and high side service valves. Be sure that the fan cycle control and crankcase heat-
ers are operating properly. Check thermostat on bath and be sure that temperature is dropping in
the bath. When the bath temperature reaches the set point on the thermostat, the liquid line solenoid
should close, suction pressure should drop and low pressure control on condensing unit should cycle
the compressor off. If unit is operating properly, replace the cover on condensing unit.

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ELECTRONIC TEMPERATURE CONTROL WITH DISPLAY
NOTE: When the unit leaves the factory the electronic thermostat is pre-set to the following parameters:
Temperature Scale: F (Fahrenheit)
Setpoint: 29° F
Differential: 3° F
Temperature Scale: F (Fahrenheit)
Setpoint: 28° F
Differential: 5° F
NOTE: To ensure the correct operation of your unit these parameters must be adhered to.
User/customer can change the temperature by pressing the up and down arrows.
SERIES MMP4305 AND MMPP4307
CHANGING GLYCOL PUMP
Note: A pinch off tool is required to complete this repair
1. Unplug unit from receptacle.
2. Pinch off glycol supply line to bottom of pump allowing enough room to remove clamp safely.
3.Holdpumprmlyandloosenclampbetweenpumpandmotor.
4. With clamp loose remove pump and drive key.
5. Install new key and pump by reattaching clamp making sure alignment of key is correct between pump and motor.
6. Reattach glycol supply hose and install clamp.
7. Remove pinch off tool and plug unit into receptacle.

10 | REMOTE POWER PACK SERVICE MANUAL MICROMATIC.COM | 866-327-4159
REPLACING MOTOR
1. Unplug unit from receptacle.
2. Support pump and loosen clamp holding pump to motor. As clamp is loosed pump will eventually
disconnect from motor. Make sure pump does not damage glycol supply line as it becomes free from motor.
3. With pump free from motor remove drive key and replace.
4. While supporting motor remove four (4) nuts and hardware from mounting studs.
5. Mount new motor by aligning mounting bracket with mounting studs and reattaching mounting nuts and
hardware. Note: new motor is supplied with mounting bracket.
6. Reattach pump to motor with clamp making sure new drive key aligns with motor shaft.
7. Locate defective motor and remove electrical connection cover plate (follow cord to where it enters back
of motor) exposing cord connections. Remove ground connection by unscrewing green screw and
removinggroundwire.Unplugremaining2wiresbypullingrmlyonconnections.Reattachcordtonew  
motorbyafxinggroundwiretogreengroundscrewandplugging2wirestomotorconnections.Place 
cord in electrical wire channel in motor housing and reattach electrical connection cover plate.
8. Plug cord into receptacle.
REPLACING THERMOSTAT
1. Unplug unit from receptacle.
2. Remove the screws holding the thermostat housing to the unit. Slide the white plastic brackets
backwards off of the thermostat. Remove thermostat from housing.
3. Making note of which wire is connected to which number on the thermostat, remove wires using small
slotted screwdriver. Reattach wires to correct numbers on new thermostat and reassemble into housing.
NOTE: All XR02 thermostats are supplied with a four wire connector. If the unit has an old XR20
thermostat, connect the 120v supply wires that were on terminals 7 and 8 to the harness wires coming
from terminals 6 and 7 on the new XR02. The wires that were connected to terminals 4 and 5 on the old
thermostat should connect to the harness wires coming from terminals 8 and 9.
4. Reattach thermostat housing to unit and plug unit into receptacle.
5. For thermostat setting instructions see page 7.

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TROUBLESHOOTING
TROUBLE CAUSE SOLUTION
1. Excessive foam A. Warm walk-in cooler A. Adjustcoolertemperatureto36°to38°F
(use a quality thermometer)
B. Check applied pressure to keg B. Adjustsettingonregulatorforproperowrateof
C. Check equipment C. Check the physical equipment from keg to faucet
D. Warm product lines D. Refer to #5
2. A. Compressor relay or capacitor
malfunction
A. Replace compressor relay or capacitor
B. Inadequate voltage B. Measure voltage across common and run terminal
on compressor. Voltage must not drop below 90%
of rated voltage.
C. Compressor failure C. Replace compressor
Compressor starts
and continues to run
until freeze up and
will not cut off.
A. Thermostat control failure A. Replace thermostat
B. Freon leak B. Repair leak and recharge
4. Compressor does
not run but hums.
A. Inadequate voltage A. Measure voltage across common and run terminal
on compressor. Voltage must not drop below 90%
of rated voltage.
B. Starting relay malfunction B. Replace starting relay. Be sure to use correct
relay. Failure to use correct relay will cause
compressor failure.
C. Compressor malfunction C. Replace compressor
5. Warm beer A. Defective Pump
(check motor also)
A. Checkreturnlineinreservoirforliquidow.Replace
pump on 125’, 250’, and 500’ units. Check condition of
key between pump and motor.
B. Defective motor (check pump also) B. Replace motor
C. Refrigeration unit not running C. Refer to #2
D. Trunk lines located in
overheated area
D. Remove from any hot water pipes or kitchen area with
stove or glass washer.
E. Trunklinesoodedin
PVC chase.
E. Remove lines from PVC, thoroughly dry PVC and repair or
replace trunk line as needed.
F. Uninsulated or poorly
insulated lines
F. All lines should be fully insulated from cooler into
dispenser. Includes glycol lines from power pack into
cooler.
G. Thermostat G. Adjusttemperaturetocoldersetting.
H. Condenser fan motor not working H. Replace condenser fan motor
I. Freon Leak I. Repair leak and recharge
J. Dirty condenser J. Clean the condenser
K. Condensation inside trunk line
insulation (may be caused from
cleaning lines)
K. Check trunk housing in areas for drooping or low spots,
split insulation approximately 5" and separate. Allow any
water to drain, then air dry the seal closed.
Compressor does
not start (no hum),
but the fan
motor runs.
two (2) ounces per second.

12 | REMOTE POWER PACK SERVICE MANUAL MICROMATIC.COM | 866-327-4159
TYPICAL SPARE PARTS
Component Part Number 75' 125' 250' 350' 500'
COMPONENT PART NUMBER MMPP4301-EP MMPP4301 MMPP4302 MMPP4303 MMPP4305 MMPP4307
Vane Pump and Motor Assembly MMPP4301-PPM X X
Pump Insulation MM-IPCPRO X X X X X
Vane Pump Assy PP4301-PPA X X X X X
Motor (1/3 HP) MMPP4301-M X X
Motor (1/3 HP 220 Volt) MMPP4305-M X X X
Vane Pump Key MM-3362-2 X X X X X
Clamp, Pump Connectors MM-BC3-KIT X X X X X
Nipple for Vane Pump-Straight 617C X X X X X
Vertical Pump MMPP4301-EPVP X
Thermostat Danfoss ERC 112C MMPP080G3206 X X X X X X
Compressor
MPP4301 Series MMPP4301-EP-C X X
Refrigeration Deck
MPP4301 Series MMPP4301-UPPER X
Refrigeration Deck
MPP4302 Series MMPP4302-UPPER X
Compressor
MPP4302 Series MMPP4302-C X
Compressor
MPP4303 Series MMPP4303-C X
Compressor
MPP4305 Series MMPP4305-C X
Compressor
MPP4307 Series MMPP4307-C X
On/Off Power Switch MMPP4301-SW-P X X X X X

MICROMATIC.COM | 866-327-4159 REMOTE POWER PACK SERVICE MANUAL |13
WIRING DIAGRAMS

14 | REMOTE POWER PACK SERVICE MANUAL MICROMATIC.COM | 866-327-4159
NOTES

MICROMATIC.COM | 866-327-4159 REMOTE POWER PACK SERVICE MANUAL |15
WARRANTY
All power packs carry a full warranty against defects in material and workmanship for a period of eighteen (18) months on
parts and one (1) year on labor. The compressor is warrantied for an additional three and one-half (3 1/2) years. All loss of
sales must be borne by the purchaser.
WARRANTY CLAIMS PROCEDURE:
Purchaser shall notify Micro Matic of any defect discovered in the Product during the Warranty Period, and obtain a return
authorization number. Purchaser must ship the Product per Micro Matic’s instruction. After receipt of the Product, Micro
Matic shall, at its option, repair (or authorize the repair of), or replace or refund the purchase price for the Products found by
Micro Matic to be defective. Micro Matic’s determination of defects is nal. Failure by Purchaser to give notice of claims of
breach of warranty within the Warranty Period shall be deemed an absolute and unconditional waiver of Purchaser’s claim
for such defects. Products repaired or replaced during the Warranty Period shall be covered by the foregoing warranties
for the remainder of the original Warranty Period or ninety (90) days from the date of delivery of the repaired or replaced
Products, whichever is longer.
ALL REPAIRS MUST BE FIRST AUTHORIZED BY MICRO MATIC PER THE ABOVE PROCEDURE. UNAUTHORIZED REPAIRS
WILL NOT BE REIMBURSED BY MICRO MATIC UNDER ANY CIRCUMSTANCES.
Micro Matic is not responsible for parts damaged from factors including, but not limited to any part that has been subject
to misuse, neglect, alteration, accident, unauthorized service, abuse, or to any damage caused by transportation. This
warranty does not cover items subject to normal wear and tear (gaskets, seals, o-rings, etc.).
PURCHASER RESPONSIBILITY:
Except as expressly provided in this Agreement, Purchaser assumes all other responsibility for any loss, damage, or injury
to persons or property arising out of, connected with, or resulting from the use of Products, either alone or in combination
with other products or components. In no event will Micro Matic be responsible for incidental, consequential or punitive
damages of any kind, including without limitation, claims for loss of beer, loss of gas or loss of sales.
OTHER WARRANTIES DISCLAIMED:
These are the sole and exclusive warranties and conditions given by Micro Matic with respect to the products and services
and are in lieu of and exclude all other warranties or conditions, express or implied, arising by operation of law or otherwise,
including without limitation, warranties of merchantability, tness for a particular purpose and non-infringement, whether
or not the purpose or use has been disclosed to Micro Matic in specications, drawings or otherwise, and whether or not
Micro Matic’s products are specically designed and/or manufactured by Micro Matic for purchaser’s use or purpose.
LIMITATION OF REMEDY:
Purchaser’s sole and exclusive remedy for breach of any warranty or condition under this Article IV shall be limited to the
repair, correction or replacement, or refund of the purchase price paid in respect of the defective Products, unless the
claim falls under the provisions of Section 6.2, in which case Purchaser may also claim damages in accordance with the
terms of Section 6.2.

02035-R-MM-M-0519 ©2019 Micro Matic USA, Inc. All Rights Reserved. Micro Matic reserves the right to change specifications without notice.