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10

REFRIGERANT PIPING — 

When connecting refrigerant piping from an indoor unit to an

outdoor unit, follow these guidelines:

• Check the maximum height drop and length of 

refrigerant piping between the indoor and outdoor units. 

To ensure the drop and length are acceptable, refer to the 

refrigerant piping allowable limits in the outdoor unit 

installation manual.

• The number of bends in the refrigeration piping must be

fewer than 15.

• Refrigerant piping connection between indoor and 

outdoor units should be performed once the units are 

secured at their respective installation locations.

• The refrigeration piping starts at the indoor unit and ends

at the outdoor unit or Multi-port Distribution Controller

(MDC) (Heat Recovery systems).

• The refrigerant piping should be dry and free of dust and

other impurities.

• The bending angle of the refrigerant pipe should not 

exceed 90

 and the bending radius should be as large as 

possible to prevent any breakage in piping.

• Use proper cutting and flaring tools to avoid leakage.

• Use a torque wrench for flare nuts. Refer to Table for

flare nut torque recommendations.

Table 3 —Flare Nut Torque Recommendations

• Before  insulating  the  suction  and  liquid  refrigeration

pipes,  perform  pressure and leak  tests.  For  details,  see

the  outdoor  unit  installation  manual.  Insulating  both

suction and liquid refrigerant pipes is mandatory.

• Vacuuming and charging of the system should be carried

out as described in the outdoor unit installation manual.

Step 5 — Complete the Electrical 

Connections — 

Installation of wiring must conform with

local building codes and with National Electric Code ANSI/

NFPA 70, current editions. Units must be electrically grounded

in conformance with the code. In Canada, wiring must comply

with CSA C22.1, Electrical Code. 

This  equipment  in  its  standard  form  is  designed  for  an

electrical supply of 208/230-1-60. Any damage to or failure of

units caused by incorrect wiring or voltage is not covered by

the warranty. 

Electric wiring must be sized to carry the full load amp draw of

the motor, starter, and any other controls that are used with the

unit. See Table 4 for electrical data.

Table 4 —40VMZ Electrical Data

LEGEND

MCA - Minimum Circuit Amps

MOPD - Maximum Overcurrent Protective Device

After the pipe work is complete, the electrical supply can be

connected by routing the cable through the appropriate casing

holes  or  knockouts  and  connecting  the  supply  and  ground

cables to the unit’s power terminal.

Be sure the power wiring and control wiring do not cross, as

this might cause disturbance on the controls side. See Fig. 15

and  for the wiring diagram.

NOTE:

 

The indoor unit requires its own power supply. Indoor

units are not powered through outdoor units.

CAUTION

When connecting from an indoor unit to an outdoor unit, 

the isolation valve at outdoor unit should be in closed 

position throughout the refrigerant piping process. 

Failure to follow this procedure may result in equipment 

damage.

Outside Diameter

Recommended Torque (FT-LB)

1

/

4

15

3

/

8

26

1

/

2

41

5

/

8

48

WARNING

Electrical shock can cause personal injury or death. 

Disconnect the power supply before making wiring 

connections. There may be more than one disconnect 

switch. Tag all disconnect locations to alert others not to 

restore power until work is completed.

WARNING

All units must be wired strictly in accordance with the 

wiring diagram furnished with the unit. Any wiring 

different from the wiring diagram could result in 

personal injury and property damage.

CAUTION

Any original factory wiring that requires replacement 

must be replaced with wiring material having a 

temperature rating of at least 105ºC.

Ensure supply voltage to the unit, as indicated on the 

serial plate, is not more than 10% over the rated voltage 

or 10% under the rated voltage. 

Failure to follow these recommendations may result in 

equipment damage.

40VMZ Unit Size

Power Supply

MCA

MOPD

40VMZ009---3

0.88

15

40VMZ012---3

1.40

40VMZ015---3

1.40

40VMZ018---3

1.90

40VMZ024---3

2.50

Summary of Contents for 40VMZ

Page 1: ...his symbol is displayed on unit and in instructions or manuals be alert to potential for personal injury WARNING Electrical shock can cause personal injury and death Shut off all power to this equipme...

Page 2: ...ons BEFORE proceeding See Fig 1 for the model number nomenclature Table 1 shows components that may or may not be used for a particular installation Table 2 lists physical data for each unit sizes Fig...

Page 3: ...DOOR EXTERNAL STATIC PRESSURE High in wg 0 8 1 0 INDOOR NOISE LEVEL dBA Low 31 6 32 5 34 2 42 2 44 5 Medium 34 0 38 6 38 4 43 8 47 0 High 35 2 39 3 39 8 44 5 47 7 UNIT Unit Dimensions W x H x D in 37...

Page 4: ...OLBOX SAFETYDRAINCONNECTINGPIPE CONNECTINGPOINTOF DRAINPIPE 27 3 16 33 3 4 8 7 16 3 3 8 37 1 2 16 1 2 3 3 8 13 3 8 16 7 8 10 211 7 21 4 12 25OBLONGSUSPENTIONBOLTHOLES AIRINTAKE AIROUTLET AIROUTLETDUCT...

Page 5: ...48 0 48 0 43 0 48 0 52 0 52 0 47 0 52 0 56 0 56 0 50 0 56 0 60 0 60 0 54 0 60 0 64 0 64 0 57 0 64 0 68 0 68 0 61 0 68 0 72 0 72 0 65 0 72 0 76 0 76 0 69 0 76 0 80 0 80 0 73 0 80 0 84 ESP Fan Speed Ra...

Page 6: ...0 60 0 53 0 60 0 66 0 64 0 57 0 64 0 71 0 68 0 60 0 68 0 76 0 72 0 64 0 72 0 80 0 76 0 68 0 76 0 84 0 80 0 72 0 80 0 88 ESP Fan Speed Range of Available Airflow Rate in H Speed Max Point Rating Point...

Page 7: ...the factory shipping carton with internal packaging in place until installation PROTECTING UNITS FROM DAMAGE Do not apply force or pressure to the coil piping or drain stub outs during handling All un...

Page 8: ...support the total weight of the unit refrigerant piping and condensate optional Proper access should be provided for maintenance for refrigerant piping EEV electronic expansion valve electrical box A...

Page 9: ...es See Fig 13 Fig 13 Using a Main Drain to Serve Multiple Indoor Units When multiple units are connected to a common condensate drain ensure that the drain is large enough to accommodate the volume of...

Page 10: ...lure of units caused by incorrect wiring or voltage is not covered by the warranty Electric wiring must be sized to carry the full load amp draw of the motor starter and any other controls that are us...

Page 11: ...put for Fan Operation FM Indoor Fan Motor HTON Output for Heating Operation T0 Return Air Temperature Sensor TA SupplyAir Temperature Sensor T2A Evaporator Inlet Temperature Sensor T2B Evaporator Outl...

Page 12: ...windows and doors Avoid positioning near shelves and curtains as these restrict air movement Avoid heat sources such as direct sunlight heaters dimmer switches and other electrical devices See Fig 19...

Page 13: ...ypical communication wiring of the heat recovery systems IMPORTANT Wiring for communication shall be 2 inches or more apart from power source wiring to avoid electric noise DO NOT insert control commu...

Page 14: ...wired controller MAXIMUM WIRING LENGTH CN51 CN50 ACB interface FAN CTONHTONAUXH CN54 OFF GND 3GOT HUGXJ Outside Air Unit Reheat unit L11 wired controller wired controller wired controller wired contr...

Page 15: ...pen posi tion System Operation Check Follow these steps once the installation and pre start checks are completed 1 Using remote controller select cooling or heating mode to check the operation of the...

Page 16: ...actory approved service replacement parts Refer to the rating plate on the unit for complete unit model number serial number and company address Any substitution of parts or controls not approved by t...

Page 17: ...ntil it cannot move any further See Fig 30 2 Lift up slightly and take it down to remove it 3 After motor maintenance reinstall the fan assemblies apply steps in reverse order step 2 then step 1 4 Con...

Page 18: ...hold LOCK for at least 10 seconds and press to query the address Programmable Controller When setting an address connect only one wired controller to an indoor unit 1 Press FAN and BACK simultaneousl...

Page 19: ...g OFF Operation and Defrost Fan Light ON System Defrost ON Operation and Defrost Fan Light OFF System Defrost OFF Operation Light ON Only FAN dd None Heating Cooling Mode Conflict E1 Communication Err...

Page 20: ...Sensor is short circuited Using multi meter measure resistance of sensor if resistance is 100 ohms change the sensor PC board fault Replace PC board E6 DC Fan Motor Operating beyond limits Check and c...

Page 21: ...Unit Size Filter Dimension W x H x D 009 to 024 28 3 8 x 13 1 4 x 3 8 MODEL R410A HIGH LOW REFRIGERANT 0 88 A 15 A 0 70 A 750 W 33 32HP 40VMZ009 3 208 230V 1Ph 60Hz 320 PSIG 580 PSIG DESIGN PRESSURE P...

Page 22: ...ns Catalog No 20 40VMZ001 01 Printed in U S A Form 40VMZ 1SI Pg 22 08 20 Replaces New Carrier Corporation 2020 APPENDIX A DIP SWITCH SETTINGS There are two DIP switches on the main board Figs A and B...

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