MICROMATIC MMPP4303-PKG User manual

MMPP4301-EP
MMPP4301
MMPP4301-WC
MMPP4301-PKG
MMPP4301-PKG-WC
MMPP4302
MMPP4302-WC
MMPP4302-PKG
MMPP4302-PKG-WC
MMPP4303-PKG
MMPP4303-PKG-WC
MMPP4303-PKG-3
MMPP4305-PKG
MMPP4305-PKG-WC
MMPP4305-PKG-3
MMPP4305-PKG-WC3
MMPP4307-PKG
MMPP4307-PKG-WC
MMPP4307-PKG-3
MMPP4307-PKG-3-WC
MMPP4307-PKG-4
MMPP4307-PKG-4-WC
POWER PACK
SERVICE MANUAL
v3.0

2| POWER PACK SERVICE MANUAL MICROMATIC.COM | 866-327-4159
EQUIPMENT SPECIFICATIONS ................................................................................. 3
INSTALLATION............................................................................................................. 8
MAINTENANCE............................................................................................................ 9
CHANGING GLYCOL PUMP...................................................................................... 11
REPLACING MOTOR.................................................................................................. 12
REPLACING THERMOSTAT...................................................................................... 12
TROUBLESHOOTING................................................................................................. 13
SPARE PARTS............................................................................................................. 14
WIRING DIAGRAMS................................................................................................... 15
WARRANTY INFORMATION..................................................................................... 23
TABLE OF CONTENTS

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EQUIPMENT SPECIFICATIONS
MODEL MMPP4301-EP MMPP4301 MMPP4301-WC MMPP4301-PKG MMPP4301-PKG-WC
Type Air Cooled Air Cooled Water Cooled* Air Cooled Water Cooled*
BTUs* 2,300 2,300 2,300 2,300 2,300
Compressor HP 1/3 1/3 1/3 1/3 1/3
Glycol Pumps 1 1 1 2 2
Pump Type Vertical Rotary Vane Rotary Vane Rotary Vane Rotary Vane
Pump GPH 240 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 5-15P L5-30P L5-30P
Voltage 115 115 115 115 115
Amps (Running) 7.0A 12.1A 11.6A 17.7A 17.2A
Refrigerant R134a R134a R134a R134a R134a
Charge (oz.) 0.28 kg (10 oz) 0.34 kg (12 oz) 0.34 kg (12 oz) 0.34 kg (12 oz) 0.28 kg (10 oz)
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)
26.12" x 17.12"x 21.56” 30" x 18" x 27.75" 30" x 18" x 28.75" 30" x 18" x 27.75" 30" x 18" x 28.75"
Weight (lbs) 41 kg / 90 lbs 55 kg / 120 lbs 55 kg / 120 lbs 58 kg / 128 lbs 58 kg / 128 lbs
Bath Capacity (gal) 4.5 gal / 17 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 Min 40 psi
Max 120 psi NA Min 40 psi Max 120 psi
Water Inlet & Outlet Fitting NA NA 9.52mm (3/8") NA 9.52mm (3/8")
Minimum Water Pipe Size NA NA 3/8" NA 3/8"
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

4| POWER PACK SERVICE MANUAL MICROMATIC.COM | 866-327-4159
EQUIPMENT SPECIFICATIONS
MODEL MMPP4302 MMPP4302-WC MMPP4302-PKG MMPP4302-PKG-WC MMPP4303-PKG
Type Air Cooled Water Cooled* Air Cooled Water Cooled* Air Cooled
BTUs* 3,600 3,600 3,600 3,600 5,100
Compressor HP 1/2 1/2 1/2 1/2 3/4
Glycol Pumps 1 1 2 2 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 5-20P 5-20P L5-30P L5-30P 6-15P
Voltage 115 115 115 115 208/230
Amps (Running) 15.4A 14.9A 21.0A 20.5A 9.5A
Refrigerant R134a R134a R134a R134a R134a
Charge (oz.) 0.45 kg (16 oz) 0.51 kg (18 oz) 0.45 kg (16 oz) 0.51 kg (18 oz) 0.79 kg (28 oz)
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 28.75" 30" x 18" x 29.75" 30" x 18" x 28.75" 30" x 18" x 29.75"
Weight (lbs) 71 kg / 157 lbs 80 kg / 175 lbs 71 kg / 157 lbs 71 kg / 157 lbs 80 kg / 175 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 Min 40 psi
Max 120 psi NA Min 40 psi Max 120 psi NA
Water Inlet & Outlet Fitting NA 9.52mm (3/8") NA 9.52mm (3/8") NA
Minimum Water Pipe Size NA 3/8" NA 3/8" 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

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EQUIPMENT SPECIFICATIONS
MODEL MMPP4303-PKG-WC MMPP4303-PKG-3 MMPP4303-PKG-3-WC MMPP4305-PKG MMPP4305-PKG-WC
Type Water Cooled* Air Cooled Water Cooled* Air Cooled Water Cooled*
BTUs* 5,100 5,100 5,100 7,250 7,250
Compressor HP 3/4 3/4 3/4 1 1
Glycol Pumps 2 3 3 2 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 6-15P 6-20P 6-20P 6-15P 6-15P
Voltage 208/230 208/230 208/230 208/230 208/230
Amps (Running) 8.4A 11A 9.9A 11.0A 9.5A
Refrigerant R134a R134a R134a R134a R134a
Charge (oz.) 0.51 kg (18 oz) 0.79 kg (28 oz) 0.51 kg (18 oz) 0.56 kg (20 oz) 0.56 kg (20 oz)
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 28.75" 30" x 18" x 29.75" 30" x 18" x 28.75" 37.12" x 18.75" x 31.15" 37.12” x 18.75” x 31.5”
Weight (lbs) 80 kg / 175 lbs 91 kg / 200 lbs 80 kg / 175 lbs 98 kg / 215 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 Min 40 psi
Max 120 psi NA Min 40 psi Max 120 psi NA Min 40 psi Max 120 psi
Water Inlet & Outlet Fitting 9.52mm (3/8") NA 9.52mm (3/8") NA 9.52mm (3/8")
Minimum Water Pipe Size 3/8" NA 3/8" NA 3/8"
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

6| POWER PACK SERVICE MANUAL MICROMATIC.COM | 866-327-4159
EQUIPMENT SPECIFICATIONS
MODEL MMPP4305-PKG-3 MMPP4305-PKG-WC3 MMPP4307-PKG MMPP4307-PKG-WC MMPP4307-PKG-3
Type Air Cooled Water Cooled* Air Cooled Water Cooled* Air Cooled
BTUs* 7,250 7,250 11,500 11,500 11,500
Compressor HP 1 1 1 1/2 1 1/2 1 1/2
Glycol Pumps 3 3 2 2 3
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 6-20P 6-15P 6-20P 6-20P 6-20P
Voltage 208/230 208/230 208/230 208/230 208/230
Amps (Running) 12.5A 11.4A 11.5A 9.9A 13.0A
Refrigerant R134a R134a R134a R134a R134a
Charge (oz.) 0.56 kg (20 oz) 0.56 kg (20 oz) 1.04 kg (37 oz) 1.04 kg (37 oz) 1.04 kg (37 oz)
Refrigerant
Running Pressures
18 (low)
140 (high)
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 31.5" 37.12” x 28.75” x 31.5” 38" x 20" x 36" 37.12” x 18.75” x 31.5” 38" x 30" x 36"
Weight (lbs) 131 kg / 290 lbs 98 kg / 215 lbs 134 kg / 295 lbs 134 kg / 295 lbs 134 kg / 295 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 Min 40 psi
Max 120 psi NA Min 40 psi Max 120 psi NA
Water Inlet & Outlet Fitting NA 9.52mm (3/8") NA 9.52mm (3/8") NA
Minimum Water Pipe Size NA 3/8" NA 3/8" 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

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EQUIPMENT SPECIFICATIONS
MODEL MMPP4307-PKG-3-WC MMPP4307-PKG-4 MMPP4307-PKG-4-WC
Type Water Cooled* Air Cooled Water Cooled*
BTUs* 11,500 11,500 11,500
Compressor HP 1 1/2 1 1/2 1 1/2
Glycol Pumps 3 4 4
Pump Type Rotary Vane Rotary Vane Rotary Vane
Pump GPH 80 80 80
Pump Motor HP 1/3 1/3 1/3
Pump Inlet/Outlet Barbs 9.52mm (3/8") 9.52mm (3/8") 9.52mm (3/8")
Plug Type 6-15P 6-20P 6-20P
Voltage 208/230 208/230 208/230
Amps (Running) 11.4A 14.5A 14.5A
Refrigerant R134a R134a R134a
Charge (oz.) 1.04 kg (37 oz) 1.04 kg (37 oz) 1.04 kg (37 oz)
Refrigerant
Running Pressures
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 31.5" 38" x 30" x 36" 37.12" x 28.75" x 31.5"
Weight (lbs) 134 kg / 295 lbs 134 kg / 295 lbs 134 kg / 295 lbs
Bath Capacity (gal) 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"
Inlet Water Pressure Min 40 psi
Max 120 psi NA Min 40 psi Max 120 psi
Water Inlet & Outlet Fitting 9.52mm (3/8") NA 9.52mm (3/8")
Minimum Water Pipe Size 3/8" NA 3/8"
Approval ETL Listed ETL Listed ETL Listed
*Rated at 20° F evaporator temperature and 90° F ambient temperature. †.3GPM, water is only used when the tempera-
ture 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

8| POWER PACK SERVICE MANUAL MICROMATIC.COM | 866-327-4159
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.
INSTALLATION STEPS
(MMPP4301-EP)
(Assure tower connections are complete.)
1. Connect one of the glycol tubes to the pump inlet. Insulate any exposed tubing.
2. Connect the second glycol line to the pump outlet. Insulate any exposed tubing.
 3. Carefullypushtheglycolbathlidtooneside,allowingsufcientspacetollthebathwithliquid.
4. Inspect the bath for debris.
5. Fill the glycol bath with Micro Matic Polar Flo®glycol solution (mixed 2 ½ parts water to 1 part glycol).
Fill the bath to the full level on the glycol level indicator.
 6. Connectunittotheelectricaloutletscapableofhandlingtherequiredvoltageloads.Thisshouldbe 
carried out by suitably trained personnel and comply with all state and national electrical codes.
 7. Glycollevelwillfallasglycolispumpedthroughtheglycollines.Continuetollthebathtothelllevel
on the glycol level indicator.
8. Replace top cover.
9. Inspect for any leaks.
10. Glycol temperature will fall slowly to 29° F.
NOTE: To adjust the glycol temperature, please see Adjusting Electronic Thermostat.

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INSTALLATION STEPS
(MMPP4301, MMPP4301-WC, MMPP4301-PKG, MMPP4301-PKG-WC, MMPP4302, MMPP4302-WC, MMPP4302-PKG,
MMPP4302-PKG-WC, MMPP4303-PKG, MMPP4303-PKG-WC, MMPP4303-PKG-3, MMPP4305-PKG, MMPP4305-PKG-WC,
MMPP4305-PKG-3, MMPP4305-PKG-WC3, MMPP4307-PKG, MMPP4307-PKG-WC, MMPP4307-PKG-3,
MMPP4307-PKG-3-WC, MMPP4307-PKG-4, MMPP4307-PKG-4-WC)
(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:
• MMPP4301, MMPP4301-WC, MMPP4301-PKG, MMPP4301-PKG-WC, MMPP4302, MMPP4302-WC,
MMPP4302-PKG, MMPP4302-PKG-WC, MMPP4303-PKG, MMPP4303-PKG-WC, MMPP4303-PKG-3.
Mix: 2 ½ parts water to 1 part glycol.
• MMPP4305-PKG, MMPP4305-PKG-WC, MMPP4305-PKG-3, MMPP4305-PKG-WC3, MMPP4307-PKG,
MMPP4307-PKG-3, MMPP4307-PKG-4)
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.
10. Temperature of the glycol will fall slowly to 29° F.
NOTE: To adjust the glycol temperature, please see Adjusting Electronic Thermostat.
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:
• MMPP4301-EP, MMPP4301, MMPP4301-WC, MMPP4301-PKG, MMPP4301-PKG-WC, MMPP4302, MMPP4302-WC,
MMPP4302-PKG, MMPP4302-PKG-WC, MMPP4303-PKG, MMPP4303-PKG-WC, MMPP4303-PKG-3.
Mix: 2 ½ parts water to 1 part glycol.
• MMPP4305-PKG, MMPP4305-PKG-WC, MMPP4305-PKG-3, MMPP4305-PKG-WC3, MMPP4307-PKG,
MMPP4307-PKG-WC, MMPP4307-PKG-3, MMPP4307-PKG-3-WC, MMPP4307-PKG-4, MMPP4307-PKG-4-WC.
Mix: 7 parts distilled water to 5 parts glycol.

10 | POWER PACK SERVICE MANUAL MICROMATIC.COM | 866-327-4159
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
MAINTENANCE (continued)
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.