The Signature Series is designed for amateur installation...

The Signature Series is NOT designed for amateur installation. Installation SHOULD be performed by an authorized technician.

Please read this manual carefully before installation and keep it for future reference.

The Signature Series is NOT designed for amateur installation. Installation SHOULD be performed by an authorized technician.

Please read this manual carefully before installation and keep it for future reference.

Owner & Installation Manual

MPC*1M414A & MPH*1M414A

Residential Packaged Units

Signature Series

507296-02C Page 1 of 12mrcool.com

THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER FOR FUTURE REFERENCE

Installation and servicing of air conditioning equipment can be hazardous due to internal refrigerant pressure and live electrical components. Only trained and

this equipment. Installation and service performed by

WARNING

other appliance. Such actions could result in property

WARNING

The installation of this appliance must conform to the requirements of the National Fire Protection Association; the

jurisdiction should be consulted before installation is made. Such applicable regulations or requirements take precedence over the general instructions in this manual.

CAUTION

Save these instructions for future reference

INSTALLATION AND MAINTENANCE INSTRUCTIONS

MPC*1M414A & MPH*1M414A

Air Conditioners and Heat PumpsC

Table of ContentsInstallation ...................................................................2Electrical Wiring...........................................................3Duct System ................................................................4Filters...........................................................................5Condensate Drain........................................................5Sequence of Operation................................................Maintenance................................................................Wiring Diagrams........................................................11

If this unit is to be installed in a mobile or manufactured

guidelines. All other installation guidelines must also

the unit.

WARNING

Manufactured ByMRCOOL LLC

C

*F507296-C*

of 12 507296-02Cmrcool.com

or maintenance can cause injury or property damage. Refer to this manual. For assistance or additional

agency.

WARNING

InstallationThese instructions explain the recommended method of installation of the packaged heat pump and air conditioner

system.

read prior to beginning installation. Note particularly any CAUTIONS or WARNINGS in these instructions and all labels on the units.

equipment should be determined prior to installation.

Inspection of Shipment

the unit inside the carton if the carton is damaged. File a

as claim may be denied.

are as ordered.

Limitations

and local safety codes.

also be observed.

outdoor air stream. The outdoor fan is not designed to operate against any additional static pressure.

Location

clearance for free entrance to the air inlet and discharge

service access.

not settle or shift. Adequate structural support must be provided. Install the unit in level position. Isolate the base from the building structure to avoid possible transmission of sound or vibration into the conditioned space.

The heat pump unit foundation should be raised to a In areas that have

prevent ice accumulation. The unit should not be located

defrost condensate.

Avoid placing the unit near quiet areas, such as sleeping quarters or study rooms. Normal operating sound levels may be objectionable if the unit is placed near certain rooms.

For improved start-up performance, the indoor coil should be washed with suitable detergent to remove any residue from manufacturing processes.

Roof Curb Installation

Instructions and be sure that all required clearances are observed.

Rigging and Handling

CAUTION

packaging until the unit is near the place of installation. An optional lifting lug kit may be purchased separately for

used across the top of the unit.

The lengths of the forks of the forklift must be a minimum of 42”.


Figure 1. Rigging Unit

Figure 2. Typical Field Wiring

CAUTION

UnpackingCarefully remove outer packaging material and discard.

corner and seal the shipping openings in the base from

prevent air leakage during unit operation.

Service AccessAccess to all serviceable components is provided by four

WARNING

ClearancesAll units require certain clearances for proper operation and service. Refer to Table 1 for the minimum clearances

proper unit operation.

Do not permit overhanging structures or shrubs to obstruct condenser air discharge outlet.

Table 1. Minimum Clearances

Clearance to Combustibles

Clearance for Service Access

Front of unit 24 in.

Back of unit

24 in.

Right side 24 in.

Base of unit

Top of unit 48 in.

Compressor

adjusted and ready for operation. Do not loosen compressor mounting bolts.

Electrical Wiring

the installer. Refer to the unit rating plate for maximum

RE

DU

CE

TO

6.0

0

RE

DU

CE

TO

W1CLROY1

FA

N

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ON

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2

2

24 V

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AN

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AC

CE

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OR

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N15 &

20K

W M

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5, 7

.5 &

10K

W H

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OF

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.

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AN

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RE

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ND

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US

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US

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IN 75

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US

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WH

EN

PR

ES

SU

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SW

ITC

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NO

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E F

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INS

TA

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WA

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LEC

TR

IC S

HO

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HA

ZA

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US

T B

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RO

UN

DE

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AC

CO

RD

AN

CE

WIT

H N

AT

ION

AL A

ND

LOC

AL C

OD

ES

.

Note: Because the Pressure Sw

itches are monitored only w

hen "Y1" (Input) is active, the codefor pressure sw

itch open will not be seen w

hen "Y1" is off. Instead, the "Norm

al Operation" or

Also, when a pressure sw

itch opens and caused a short cycle lockout, the pressure switch-open

code will be seen until it closes, then the short cycle lockout code w

ill flash unless it has alreadyRE

V. V

ALV

E

DE

FR

OS

TT

'ST

AT


or pigtail leads located on the main control box and are

during normal operation.

CAUTION

Units are factory wired for a 230-volt power supply. If power supply is 208 volts, it will be necessary to change a wire connection on the unit transformer from 240V terminal to 208V terminal as shown on the wiring diagram.

Use only copper conductors.

ThermostatThe room thermostat should be located on an inside

installation.

changed

Sin

gle

Pha

se

Contactor or Circuit Breaker Disconnect

Figure 3. 208/230 Line Voltage Wiring

Figure 4. Typical Wiring Connections

* “O” connection used only on heat pump models*

off W1 only.

Duct SystemDuct system should be designed and sized according to the methods in Manual Q of the Air Conditioning Contractors of

A closed return duct system shall be used. This shall not preclude use of economizers or outdoor fresh air intake. It is recommended that supply and return duct connections

The supply and return air duct systems should be designed for the CFM and static requirements of the job. They should not be sized to match the dimensions of the duct connections on the unit.

panel. Duct to unit connections must be sealed and


1.the unit base insulation to access bottom metal covers underneath the insulation.

2.

3.

bottom duct connections or roof curb seals.

4.

5.

Filters

is limited.

NOTE:

Table 2. Unit Air Filter Sizes - inches

Unit Model Filter 1 Filter 2

NOTE: Install drain lines and trap so they do not block service access to the unit.

See Figure 5 for proper drain arrangement. The drain line must pitch to an open drain or pump to prevent clogging

material to prevent air leakage into the return air system.

CAUTION

Minimum Pitch:

Open

Trap must be deep enough to offset maximum static difference

Mounting Frame

Figure 5. Typical Condensate Drain Connection

Crankcase Heater (if used)

to prevent excessive migration of liquid refrigerant into the

to the unit to keep this feature active.

do not open the system disconnect switch.

Heater Kit Accessory (if used)

auxiliary heat. A heater kit accessory may also be used. To

1.access.

Condensate Drain

for condensate line connection. Plumbing must conform

threads.

Do not

The condensate drain line must be properly trapped, routed to a suitable drain and primed prior to unit commissioning.

507296-02Cmrcool.com

Figure 6. Heater Kit Accessory Installation

2.

and discard.

3. Remove the heater blockoff by removing the four

4. Insert the heater into the control panel and fasten in the same mounting holes.

5.

connections on the heater kit.

Sequence of Operation

Cooling

compressor and outdoor fan. The thermostat automatically

Heating - Heat Pump Stage

and outdoor fan. The reversing valve is not energized in the heating mode. The thermostat again automatically

stops unit operation.

Heating - Auxiliary Electric Heat

continues to operate until all heating elements have turned off.

Defrost System

thermostat and the defrost control.

Defrost Thermostat

The defrost thermostat is located on the outdoor coil.

thermostat contacts close and send a signal to the defrost control board to start the defrost timing. It also terminates

507296-02C mrcool.com

Defrost Control

The defrost control board includes the combined functions

heating operation to defrost mode and back. During the

relay is energized and the defrost begins.

1.

°F in heating

NOTE: 15°F is an approximate temperature, depending upon model and installation location.

2.

and the defrost time interval must not have expired.

3.

conditions.

Figure 7. Defrost Control Board

24V TERMINALSTRIPCONNECTIONS

DIAGNOSTICLEDS

HIGH PRESSURESWITCH

TESTPINS

DEFROST TIMINGPINS (P1)

REVERSINGVALVE

DEFROSTTHERMOSTAT (S6)

LOW PRESSURESWITCH

COMPRESSORDELAY PINS

S4

S87

SERVICE LIGHTCONNECTIONS

Defrost Control Timing Pins

Each timing pin selection provides a different accumulated compressor run time period during one thermostat run cycle. This time period must occur before a defrost cycle

It is intended that this product should be set at the 60-minute time interval at initial installation. If the timing selector jumper is not in

The maximum defrost period is 14 minutes and cannot be adjusted.

NOTE:

A test option is provided for troubleshooting. The test mode may be started any time the unit is in the heating mode and the defrost thermostat is closed or jumpered. If the jumper

the test pins. When the jumper is placed across the TEST

in defrost mode until the defrost thermostat opens or 14 minutes have passed. If the jumper is not removed until

again until the jumper is removed and reapplied.

Compressor Delay (Quiet Shift)

NOTE: The 30-second “off” cycle is not functional when jumpering the TEST pins.

Time Delay

ensures the compressor is off for a minimum amount of

to protect the compressor from short cycling in case the

The delay is bypassed by placing the timer select jumper

Pressure Switch Circuit

defrost control board on heat pump models. Air conditioning

During a single demand cycle, the defrost control will

interrupted by any pressure switch wired to the control board. In addition, the diagnostic LEDs will indicate a

of an open pressure switch (see Table 3).


The unit will remain locked out until power to the board is interrupted, then re-established, or until the jumper is applied to the TEST pins for 0.5 seconds.

NOTE: The defrost control board ignores input from the low pressure switch terminals as follows:

• During the TEST mode

• During the defrost cycle

•

•

If the TEST pins are jumpered and the 5-minute delay is being bypassed, the LO PS terminal signal is not ignored during the 90-second start-up period.

Diagnostic LEDs

Defrost Board Diagnostic LEDs

Green LED(DS2)

Red LED(DS1)

Condition

OFF OFF

ON

Fault & Lockout Codes

OFF

OFF ON

OFF

ON OFF

Table 3. Defrost Control (CMC1) Diagnostic LEDs

System Performance

the suction superheat value to judge performance. When checking performance of a unit that uses an expansion

system performance.

If the measured performance value varies from table value

refrigerant to nameplate charge. It is critical that the exact

system performance.

components.

Model Suction

Superheat +/- 3°Liquid

Subcooling +/- 2°

2 Ton 13

2.5 Ton

3 Ton 14

3.5 Ton 14

4 Ton

5 Ton

Table 4. Air Conditioner Unit Cooling System Performance Values

Model Suction

Superheat +/- 3°Liquid Subcooling

+/- 2°

2 Ton 18

2.5 Ton

3 Ton

3.5 Ton 22

4 Ton 22

5 Ton 5

Table 5. Heat Pump Cooling System Performance Values

Model Liquid Subcooling +/- 2°

2 Ton 25

2.5 Ton 15

3 Ton 28

3.5 Ton

4 Ton 35

5 Ton 28

Table 6. Heat Pump Heating System Performance Values

507296-02C mrcool.com

Maintenance

Before performing maintenance operations on the

shock could cause personal injury or death.

WARNING

Periodic inspection and maintenance normally consists of

cleaning.

Filters

Replace disposable or clean permanent type as necessary.

MotorsIndoor and outdoor fan and vent motors are permanently lubricated and require no maintenance.

constant torque motor. These motors remain energized and

use Tap 3 for cooling speed and Tap 5 for heating speed.

Outdoor Coil

the outdoor coil surface or other parts in the air circuit. Cleaning should be as often as necessary to keep the coil

damaged.

Table 7. Cooling Performance - AC Models80 DB / 67 WB Deg.

Return AirAir Temperature Entering Outdoor Coil, Degree F

Cooling Input

(1000 BTU)Pressure 65° 70° 75° 80° 82° 85° 90° 95° 100° 105° 110° 115°

24

Suction

135 141 143 148 152 154

135 142 143 145 152 154 155

135 142 143 144 151 152 154 155

42 132 135 141 143 145 148

48 132 143 144 145 151 152 154

131 133 134 135 141 144 152

24 282 318 388 413 438

314 323 358 432 483

351 423

42 248 325 385 411

48 338 352 455 482

324 415 438

507296-02Cmrcool.com

Table 8. Heating Performance - HP Models

70 Deg. F Return Air Air Temperature Entering Outdoor Coil, Degree F

Cooling Input

(1000 BTU)Pressure 0° 5° 10° 17° 20° 25° 35° 40° 47° 50° 55° 60°

24

Suction

33 41 113 121

31 38 45 55 81 88

35 42 58 82 115

42 25 33 42 54 85 111

48 32 84 114 122

44 54 58

24 283 312 323

253 281 312 323

251 258 321 328 335

42 311 315 322 331 333 341

48 318 323 332 358 384

281 334 343 355

Table 9. Cooling Performance - HP Models80 DB / 67 WB Deg.

Return AirAir Temperature Entering Outdoor Coil, Degree F

Cooling Input

(1000 BTU)Pressure 65° 70° 75° 80° 82° 85° 90° 95° 100° 105° 110° 115°

24

Suction

134 138 141 143 145 148 151 152 154 155

133 141 143 145 151 153

138 142 143 144 145 151 152 154

42 131 134 138 141 144 148 148 148

48 132 135 138 142 143 144 151 152 154 155

133 134 135 138 142

24 255 388 414

254 314 322 383

285 322 343 443

42 238 324 348 421 445

48 248 412 438

245 312 415 438


Figure 8. Connections Diagram - A/C Constant Torque

208/230-1-60POWER SUPPLY WITH MIN.

75 C COPPER WIRE

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1

Wiring Diagrams


208/230V-1PH,60HZ

Des

crip

tion

DS

1 (G

RE

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S2

(RE

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Pow

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lash

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Hig

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24V

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the

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or m

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ostic

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Mod

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J1-1

J1-3

B4

B3

CO

NT

AC

TO

R

K1

HIG

H P

RE

SS

UR

ES

WIT

CH

TH

ER

MA

L P

RO

TE

CT

ION

SW

ITC

H(I

F U

SE

D)

S17

3

S4

J1-1

1

J1-1

2

RE

V. V

ALV

E

DE

FR

OS

TT

'ST

AT

LOW

PR

ES

SU

RE

SW

ITC

H

GR

YG

RY

BLK

BLK

BR

N

BR

N

L1

S79 S6

J1-5

J1-6

J1-8

J1-9

J1-7

J1-1

0

YEL

T1

BLU

YEL

J2-6

J2-5

S1

CO

NT

RO

L C

IRC

UIT

WIR

ING

TO

BE

24

VO

LT, N

EC

CLA

SS

-2

CM

C1

J1: P

LUG

TH

RO

UG

H C

ON

TR

OL

PA

NE

L (1

2 P

IN)

J2: P

LUG

FO

R A

CC

ES

SO

RY

HE

AT

(6

PIN

)

IND

OO

R B

LOW

ER

MO

TO

R

GRN

FLO

AT

SW

ITC

H(I

F U

SE

D)

YE

L

YE

L

CR

AN

KC

AS

EH

EA

TE

R(I

F U

SE

D)

BLK BLK

HR

1

Figure 9. Connections Diagram - Heat Pump Constant Torque

The design and specifications of this product and/or manual are subject to change without prior notice. Consult with the sales agency or manufacturer for details.

Signature SeriesMPC*1M414A & MPH*1M414A

Residential PackageELECTRICIAN and/or HVAC TECHNICIAN: LICENSE #: INSTALLATION DATE:

INSTALLATION LOCATION:

SERIAL NUMBER:

The Signature Series is designed for amateur installation...

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