McQuay M5RT 90 BR, M5RT 120 BR, M5RT 150 BR, M5RT 180 BR, M5RT 210 BR Technical Manual

M5RT-B-2011

R410A Rooftop Packaged
B Series

Catalog

Models:

M5RT 90 BR
M5RT 120 BR
M5RT 150 BR
M5RT 180 BR
M5RT 210 BR
M5RT 250 BR

EC 90 B
EC 120 B
EC 150 B
EC 180 B
EC 210 B
EC 250 B

Economizer Kit (Option)

Nomenclature .......................................................................................................................1

- Indoor

- Outdoor

- Product Line-Up

Features ...............................................................................................................................3

Application Information.........................................................................................................6

- Operating Range

- Refrigerant Circuit Diagrams

- Installation Guideline

Sound data .........................................................................................................................16

- Sound Pressure/Power Level

- NC Curve

Selection Process ..............................................................................................................20

- Variable Pitch Pulley (VPP)

- Blower Curve

Engineering and Physical Data ..........................................................................................30

Performance Data ..............................................................................................................35

- Calculation Steps

- Performance tables

Outlines & Dimensions .......................................................................................................48

Wiring Diagrams .................................................................................................................60

Service and Maintainance ..................................................................................................68

Troubleshooting .................................................................................................................70

Part list ............................................................................................................................... 72

Table of Contents

Note : Installation and maintenance are to be performed only by qualied personnel who are

familiar with local codes and regulations, and experienced with this type of equipment.

Caution : Sharp edges and coil surfaces are a potential injury hazard. Avoid contact with them.

Warning : Moving machinery and electrical power hazard. May cause severe personnel

injury or death. Disconnect and lock off power before servicing equipment.

“McQuay” is a registered trademark of McQuay International. All rights reserved.

© 2011 McQuay International. All rights reserved throughout the world.

Bulletin illustrations cover the general appearance of McQuay International products at the time of publication.

We reserve the right to change design and construction specications at any time without notice.

Supersedes: M5RT-B-2010

1

Nomenclature

M RT 90 B R – F E AA

Brand

M : McQuay

Product Specification
Variation

A : First Issue

Optional Specification

E : Economizer

Model

“ ” : Cooling Only
R : Heat Pump

Electrical Characteristics

F : 50Hz / 3Ph / 380-415V

Refrigerant

“ ” : R22
4 : R407C
5 : R410A

Product Type

RT : Rooftop

Size

90 : 90,000 Btu/h

Product series

B : B Series

2

Product Line-up

M5RT-BR Series

Heat pump

Rooftop panel

PCB

EXV

Gold Fin (NA549)

Scroll compressor

Saranet Air Filter

Side flow

Convertible

Filter Drier

High pressure switch

Low pressure switch

90BR FEAA X X X XX X X X X X X

120BR FEAA X X X X X X X X X

150BR FEAA X X X X X X X X X

180BR FEAA X X

X

X

X

X

X

X X X X X X X X

Economizer Kit *

X

X

X

X

210BR FEAA X XXX X X X X X X X X

250BR FEAA X XXX X X X X X X X X

Heating

Nomenclature

Classification

Model

M5RT

Heat pump

Variable Pitch Pulley (VPP)

X

X

X

X

X

X

* Optional accessories (field install)

3

• PackageUnit:

McQuay’s new range of rooftop packaged units has been developed specically to suit commercial applications

and are designed to be easy to install, requiring only ducting (and associated ttings), power/ control wiring
and drain piping. Along with the light grey colour, the at top and compact design gives an aesthetic and neat

appearance when installed in line of sight. The unit cabinet is made of powder coated sheet metal especially
suitable for outdoor use. All parts of the structure are fastened with corrosion resistant screws and bolts.

• BaseBeam:

The base beams are xed and provide a rigid foundation for the entire unit. The beam has the forklift slots and

rigging holes for better handling purpose. It is also designed to allow mounting on a roof curb, the dimension
of the roof curb should be followed strictly in accordance with the installation manual.

• FlexibleAirSupply:

Since all the units utilize a belt/ pulley driven supply air fan, the units are able to meet a wide range of supply

air volumes and external static pressures. Furthermore, the supply air fan motors, pulleys and belts (eld
supplied) can be easily changed on site to meet exact air ow and ESP requirement if required.

• ConvertibleReturnandSupplyAir:

Unit can be easily converted from horizontal to vertical (downward) supply and return air duct conguration

by relocating the panels and supply air fan mounting.

• ScrollCompressor:

Units are equipped with high efciency and reliable scroll compressors. Each compressor is mounted on

rubber vibration isolators in order to reduce the noise level and vibration transmissions.

• PowderCoatedCondensateDrainPan:

The sheet metal condensate drain pan is powder coated to resist corrosion.

• Slotsfor2inchesReturnAirFilters:

A 2 inches rail is provided as standard in instances where a eld supplied lter casement need to be

installed.

• HigherEnergyEfciencyRating:

The M5RT-BR series is designed in line with market requirement for better energy saving.

TechnicalSpecication

• Compressor

Compressor used in M5RT-BR series Packaged Units are hermetically sealed scroll type. All the compressors

are provided with an internal overload protection.

• Condenser

Condenser coils are manufactured from seamless inner grooved copper tubes mechanically bonded to

aluminium ns to ensure optimum heat transfer. All coils are tested against by Nitrogen holding at 609psig

and highly precise Helium leak test at 235psig.

ALL standard coils are up to 3 rows / 14-16 FPI, 3/8” (9.52mm) O.D. tubes.
Hydrophilic Gold Fin coating (NA549) is offered as standard, which has longer life span under corrosive

environment.

Features

GeneralSpecication

4

• Evaporator

Evaporator coils are manufactured from seamless inner grooved copper tubes mechanically bonded to

aluminium ns to ensure optimum heat transfer. All coils are tested against by Nitrogen holding at 609psig

and highly precise Helium leak test at 235psig.

ALL standard coils are 3-4 rows / 14-16 FPI, 3/8” (9.52mm) O.D. tubes.

Hydrophilic Gold Fin coating (NA549) is offered as standard, which has longer life span under corrosive environment.

• CondenserFanandMotor

Fans are of propeller type, direct driven by weatherproof electrical induction motors. Condenser fan motor

has class F insulation and splash-proof enclosure, IP44.

• EvaporatorFanandDrive

Blower is DWDI centrifugal, forward curved type. It is mechanically and dynamically balanced and being

mounted on a rigid shaft in a self aligned bearing block. The motor is tted with an adjustable variable pitch

pulley (VPP) drive as standard. It has class B insulation and dripping water proof, IP22.

• RefrigerantCircuit

Each refrigerant circuit shall have independent electronic expansion devices, HP/LP switch and refrigerant

line service pressure ports as standard factory installed.

• ExpansionDevice

Electronic Expansion Valve is being used to ensure accurate control of refrigerant ow.

• Casing/Structure

The unit casing used in M5RT-BR series is made of zinc coated galvanized steel sheets. It is further coated

with an electrostatic powder coat and then oven-baked for a tough and lasting weather resistant nish. Zinc

plated screws are used throughout to further reduce possibility of unit rusting.

• Insulation

ALL possible areas of condensation to happen are insulated by PE, Polyethelene. Panel insulation is 10mm

thickness while drain pan insulation is 5mm thickness.

• Control

Units shall be completely factory supplied with an integrated controlled Module, with built in resident control

algorithms to make decide heating, cooling, or ventilating operations in response to electronic signals from
indoor & outdoor temperature sensors.

• RooftopPanel-handset

Rooftop Panel comprises all starting, operating and safety controls setting. It is connected to the IC module

PCB and supplied as standard. Standard wire length is 15 meter and it can be extended up to 100 meter.

OptionalFeatures

• 3rdPartyThermostat

For application that requires uniform thermostat outlook with other electrical appliances. 3rd Party thermostat

can be connected to the factory supplied module via the contact point available on PCB board.

• BasicBMSConnection

Unit’s standard PCB board provides dry contact for basic BMS connection. Input signal will go to dry contact

ON/OFF, COOL/HEAT, and 4 to 20 mA temperature adjuster while output signal will come from ON/OFF,
COOL/HEAT, ALARM and DEFROST dry contact.

• Economizer

The economizer kit allows outside air to be mixed with return air for ‘free’ cooling if the outdoor air temperature

is suitable. Economizer cooling can be used alone or in conjunction with mechanical cooling. Beside that,
the economizer kit can be used as well to provide ventilation air thus can improve indoor air quality. Please
refer to the economizer kit features for more details.

• CO2Sensor

Field specied CO2 sensor can be easily plug on the control board’s dry contact, which is available on the

economizer extension board.

• AuxiliaryHeater

Auxiliary heater connection point is available on the standard PCB for eld supplied heater connection.

5

EconomizerKitFeatures

Introduction

Economizer kit is an accessory provided by the factory, but requires eld installation. It is also designed to cater

for horizontal or vertical down throw air discharge orientation. Economizer kit is compatible for R410A rooftop
models. If you are unsure whether this kit can be used with your particular unit, please contact authorized service
division. It is vital to do a correct selection on economizer kit, refer the table below for kit selection guideline:

1.Easyinstallation

- The economizer kit can be installed on all new M5RTBR-FEAA Rooftop series.

- No additional wiring is needed as the unit comes from factory is ready for this.

- No additional cost for standard unit, when the users do not require economizer features since

the kit is elded installed.

2.Control

- Economizer is controlled by differential temperature.

- By using certain temperature inputs, the economizer will be activated once a certain set point is
achieved

3.FreeCooling

- Economizer kit is able to provide ‘free cooling’.

- Depending on outdoor air conditions, the opening of the damper will be changed.

- The better the outdoor air conditions, the higher efciency of the unit due to lesser mechanical

cooling.

4.IndoorAirQuality

- Economizer kit is able to provide fresh air; it helps to maintain indoor air quality.

- The build-in controller is ready to be used with eld installed CO2 sensor.

- Thus, it further improves the indoor air quality.

5.Damper

- Dampers modulation are controlled by reliable spring-return motor.

- Designed with extruded aluminium blades and frame, it is always light and it has low air

leakage.

6.Filter

- Pre-ltration is used to prevent foreign objects, such as birds, stones, leaves from going into the unit.

- An additional slot is ready for secondary lter for better ltering (to be eld installed)

No.

NOTE:

1 M5RT90BR
2

M5RT120BR
3 M5RT150BR
4 M5RT180BR
5 M5RT210BR
6 M5RT250BR

Wrong selection may cause the kit is unable to be assembled with the rooftop unit.

Economizer kit which is compatible with

rooftop unit

Rooftop Unit

EC90B
EC120B
EC150B
EC180B
EC210B
EC250B

6

Application Information

Operating Range

The applicable operating range for unit with economizer feature same like normal unit.
However, the restriction of fresh air opening will occur in high ambient or low ambient in order to ensure the
reliability of the unit.
For high ambient in cooling operation, fresh air opening will be restricted at not more than 15%. When the
outdoor DB temperature is more than 50°C, the fresh air opening will be closed to 0%.
For low ambient in heating operation, fresh air opening will be restricted at not more than 10% to avoid cold
draft issue.
It is recommended to select an appropriate fresh air opening by considering the whole operating range of the
air-conditioner unit in both cooling and heating operation.

10 30

15

-15

-10

20

20

18

10

0

-20
27

52

50

43

40

20

10

30

0

-10
14

10 20

19

23 30

Cooling

Heating

Indoor WB temperature (°C) Indoor DB temperature (°C)

Outdoor DB temperature (°C)

Outdoor WB temperature (°C)

CAUTION

The use of the air conditioner outside the
range of working temperature and humidity
can result in serious failure.

Ensure the operating temperature is within the allowable range, as stated in diagram below:

7

RefrigerantCircuitDiagrams

Model: M5RT90/120/150/180/210/250BR

Cooling Operation
Heating Operation

13

12

10 11 14

15

16

17

4

3

3

2

9

8

1

5

7

6

7

Note: (a) M5RT 120,150,180,210 & 250 consists of 2 circuits in the system.

(b) Item no. 15 & 16 are applicable for M5RT 120 only.
(c) Item no. 17 are applicable for M5RT 250 only.

Item Part’s Model/Part No/Size

1 Compressor
2 High Pressure Switch
3 Access Valve
4 4 - Ways Valve
5 Filter Drier
6 Electronic Expansion Valve
7 Strainer
8 Accumulator
9 Low Pressure Switch
10 Solenoid Valve
11 Bypass Capillary Tube
12 Indoor Heat Exchanger
13 Outdoor Heat Exchanger
14 Check Valve 1
15 Check Valve 2
16 Compensator
17 Capillary Tube

4100581, 4106124, 4100582, 4107111

8

Condenser

air outlet

3000

Condenser
air inlet

1200

1200

Blower & motor
service

Evaporator coil
& economizer
kit service

1000

Electrical control
circuit service

Compressor service

lter for economizer

kit service

lter

service

Fresh air
inlet

X

1200

X : No obstacles and no accumulation of
snow or water shall be allowed in this area.

Note 1:

Additional space or clearance is required when economizer kit is installed. Whenever the unit is equipped with
economizer kit, the space required around the unit with economizer kit shall follow the diagram below:-

Installation Clearance

Installation

Refer diagram below for the space required around the unit. Note that:-

All dimensions shown are in mm.
All space value shown are minimum clearance required for the unit.
Unit shown in the diagram is M5RT90BR. Other models shall follow the same clearance.

●

●

●

Condenser

air outlet

3000

Condenser
air inlet

1200

1200

Blower & motor
service

lter

service

Evaporator coil
service

1200

Electrical control
circuit service

Compressor service

9

M5RT 90,120, 150, 180, 210 & 250 BR

Unit Conversion

In the case of converting standard unit to downthrow unit, follow the steps as stated below:

Remove the
side panel

Remove the
Pulley Belt

Detached the

blower support

Detached
blower

Remove screws
at both sides

For M5RT 90BR
The two side plates are screwed

on the blower support as shown

For M5RT 120, 150, 180, 210 & 250BR

ow structure

are screwed to blower

Cover the
horiz

ontal supply
opening with the
blower support
that detached
from the blower
and screw tightly.
Refer Note 2.

Turn the blower to face bottom.
Screw at both sides.

Install back the pulley
belt. Adjust the belt
tension by moving the
motor base.

Cover the horizontal
return opening with the
cover and screw tightly.
Refer Note 2.

Unscrew the vertical return
cover from the base panel

Remove the side
panel at return side

Lastly, install back the side panel.

Install back the pulley belt. Adjust the belt tension. Lastly, install back the side panel. Refer Note 1.

Note 1

Note 2

For downthrow conversion, belt length need to be changed.
For unit with standard pulley, belt length = a mm
Shaft to shaft distance for downthrow, C-C = b mm

M5RT90BR M5RT120BR M5RT150BR M5RT180BR M5RT210BR M5RT250BR

a 1382

1357 1250 1382 1382 1382

b 375 388 375 445 445 435

1

►►►

4

2

▼▼▼

3

◄◄◄

Sealant such like gasket (field supply) shall be placed in between the metal cover and flange. Besides that,
weather-proof silicone shall be applied on all the joints, screw holes and gaps to ensure water-tight condition.

10

Wire Connection

• All electrical work must be carried out by qualified electrician and accordance with local supply requirement
and associate regulation.

Method for connecting electric wire

Before connecting the wire, consult the electric power company of jurisdiction.

(1) The entire wiring diagram of unit

PE

a

b

c

d

g

e

f

(2) Wiring connection to unit

Route the power supply wires and control wire through the knockout holes in the unit.
Remove the service panels and connect the units power supply wires to terminal block inside the control

box, as shown.

Power supply
Main switch/fuse

(field supply)
Power supply

wiring for unit

Unit
Remote control

Connection wiring for
unit & remote controller

Earth

a.
b.

c.

d.
e.
f.

g.

Note:

While installing the circuit breaker onto the unit, make sure that the screws do not damage the components
(e.g. coil) inside the unit.

The switch box also can be installed without attaching to the unit.
The knockout holes are only in M5RT90BR; M5RT120BR; M5RT150BR; M5RT180BR; M5RT210BR;
M5RT250BR comes with a power cable hole.

M5RT90BR

Recommended

switch box position

Terminal block

Terminal block

(seal off the knockout holes after installation)

Power cable
Control wire

Power cable
Control wire

M5RT120/150/180/210/250BR

CONTROL

BOX

CONTROL

BOX

Model

Power cable

(mm2)

M5RT90BR
M5RT120BR

4 32 32 4
6 40 40 6
10 40 40 10
10 50 50 10
16 63 63 16
25 80 80 25

M5RT150BR
M5RT180BR
M5RT210BR

M5RT250BR

Wiring Example And Selection Of Circuit Breaker

Earth cable

(mm

2

)protection switch (A)

Over current

capacity(A)

Breaker

11

Note:

A main switch or other means for disconnection, having a contact separation in all poles, must be incorporated
in fixed wiring in accordance with local and national legislation.

• The unit is to be wired directly from an electrical distribution board either by a circuit breaker (preferred) or HRC fuse.

• Fix the power supply wiring to control module. Connect control wiring to control terminal block through the

control box’s hole.

• Earth wiring must be connected.

• The power supply cord must be equivalent to H05VV-F (60227 IEC 52 or 60227 IEC 53) which is the minimum

requirement, and to be used in protective tube.

! WARNING

• Before working in this unit, isolate it from the power supply.

• Electrical wiring to this unit and the remote controller shall be installed in accordance with the appropriate

requirement of the local wiring code.

Observe the notes mentioned below when wiring to the terminal
block. Precautions to be taken for power supply wiring.
(Use a round crimp-style terminal for connection to the terminal
block. In case it cannot be used due to unavoidable reasons, be
sure to observe the following instruction.)

When connecting the connection wires to the terminal block using a single core wire, be sure to perform curling.
Problems with the work may cause heat and fires.

CAUTION

• Pull the wire and make sure that it does not disconnect. Then fix the wire in place with a wire stop.

Stripping wire at terminal block

Good

Wrong

Strip wire end
to this point.

Excessive strip length
may cause electrical
shock or leakage.

Round crimp-style
terminal

Stranded wire

!

Control Operation Guide

The unit is equipped with a controller main board, and a wired remote controller is connected to the controller
main board.
All the setting in the unit is preset by the manufacturer. It is not recommended to change the setting unless
necessary or mentioned below.

a) Remote Controller Location
The remote controller is located on a metal bracket behind the service panel. It is packed together with

installation manual.

RB052 & 012,081,051,021TRM5

Remove

panel

CONTROL

BOX

CONTROL

BOX

M5RT90BR

12

G Y1 Y2 W1 W2 Mode Operation

0 0 0 0 0 - Unit off
1 0 0 0 0 Cool Indoor fan on
X 1 0 X X Cool 1 stage compressor
X 1 1 X X Cool 2 stage compressor
X 0 X 1 0 Heatpump/Heater 1 stage compressor
X 0 X 1 1 Heatpump/Heater 2 stage compressor

Remark: X = Don’t care.

ON

OFF

b) LED Display (Controller Main Board)
The LED will blink when power up the unit.
c) LCD Display (Remote Controller)
During normal operations, the LCD displays compressor on/off status, mode, set temperature and so on.

Refer to Operating Manual for the details of operation guide. The LCD will display the main screen upon
power-up. When malfunctioning occur, a pop-up message will appear on the LCD with backlight blinking
and ‘beep’ sound.

d) Optional Confi gurations
The controller main board can be used as the interface for thermostat control and BMS system.
(i) Thermostat control (TB_THM-I)

• To use this control, set Dip Switch Setting: SW1-ON (default is OFF).

• Follow the method below for thermostat control inputs:

• Refer table below for installation recommendations:

Input Rated voltage Rated current Wire size

G

24V AC 5mA AWG18~22

Y1

Y2
W1
W2

Input TB_BMS-I Rated voltage Rated current Wire size

24V AC 5mA

AWG18~22Operating mode 24V AC 5mA

Cool/Heat set point - 4~20mA

1 2 3 4 5 6 7 8

ON

OFF

Note:

•

When the controller main board is confi gured as thermostat control, the remote controller is used for

monitoring purpose only.

• Unit needs to be restarted (power off and on) whenever dip switch setting is changed.

Note:

•

When the controller main board is confi gured as BMS control, the remote controller is used for

monitoring purpose only.

• Unit needs to be restarted (power off and on) whenever dip switch setting is changed.

Note:

•

G8 = Control Type
0 = Panel
1 = BMS

(ii) BMS control (TB_BMS-I)

• To use this control, set Dip Switch Setting: SW3 - ON (default is OFF) and panel parameter G8 to ‘1’

(default is ‘0’).

(iii) Dry contact output (TB_BMS-O)

• For TB_BMS-O, there are 4 monitoring outputs: error alarm; output1; output2; and defrost signal.

• Refer table below for installation recommendations:

• For TB_BMS-I, there are 3 control inputs:
unit on/off ; operating mode (cool-0/heat-1); and set point (4~20mA).

• Refer below table for installation recommendations:

ezis eriW)A( tnerruc detaRegatlov detaRO-SMB_BT tupnI

Alarm output (AL) 230V AC/125V AC/30V DC 1/3/3

AWG18~22

3/3/2)1O( 1tuptuO
3/3/3)2O( 2tuptuO

Defrost signal (DFRT) 230V AC/125V AC/30V DC 4/3/3

230V AC/125V AC/30V DC
230V AC/125V AC/30V DC

• The output signals will vary depending on the confi guration of controller main board, whether it is

thermostat control or BMS control.

13

(1) For thermostat control, the outputs are summarized as below:

(2) For BMS control, the outputs are summarized as below:

Output 1*

OFF OFF OFF mode

FAN mode

COOL mode

HEAT mode

OFF

ON

ON

OFF

ON
ON

Output Status

Output 2* Description of operation

Output statusOutput

Output

Output 1

ON

ON mode

OFF mode

HEAT mode

COOL mode

System defrosting

Normal

Alarm occurred

No alarm occurred

OFF

ON

OFF

ON

OFF

ON

OFF

Output 2

Defrost

Alarm

Output status

System defrosting

Normal

Alarm occurred

No alarm occurred

OFF

OFF

ON

ON

Defrost

Alarm

* Output 1 = ON/OFF
* Output 2 = COOL/HEAT

Description of operation

Description of operation

The diagram below shows the position for terminal blocks in the controller main board which are used for
thermostat control and BMS system. Beside that, the output pins for auxilliary electrical heater are shown
as well.

Thermostat Control (TB_THM-l)

Connect to
third party
controller

BMS System (TB_BMS-l)

Connect to
BMS
System

Dry Contact Outputs (TB_BMS-O)

Controller Main Board

Alarm
output

(AL)

Output

1 (O1)

Output

2 (O2)

Defrost

signal

(DFRT)

Heater Output (HTR1 and HTR2)

Connect to

heater

contactor

Connect to

heater

contactor

Unit

on/

Cool/

Heat

mode

select

Cool/

Heat

set

point

Supply

Voltage

24V AC

Thermostat control

inputs

(G, Y1, Y2, W1, W2)

14

(iv) Auxilliary Electrical Heater Output (HTR1 and HTR2)

• There are two output pins (HTR1 and HTR2) on controller main board, which are used to energize
the heater contactor. The contactor must be selected accordingly to avoid any safety issue(s).

• The heater shall be installed in accordance with local and national legislation. It must comply with
EN60335-2-40.

• Thermal fuse(s) shall be installed on the heater to eliminate any danger or damage on the
heater/unit. This is especially critical when there is any malfunction happen to controller main board
or blower.

• The heater shall be in a safe location, whereby no risk of damage could be happen on the unit.

• Use non-flammable duct for the unit that is installed with heater

• Use diff erent power supply for electrical heater and install a circuit breaker for each of the heater.

• Maximum temperature in the unit must not exceed 60°C. Temperature measurement shall be taken
during the installation or commisioning in order to ensure the temperature not exceed this value.

• Select the proper safety device or thermal protector accordingly.

• The heater shall never be installed inside the unit. The recommended location for the heater is inside
the supply duct, whereby the distance of the heater is suffi cient to ensure the temperature inside the
unit does not exceed 60°C.

(v) Economizer control

• Ensure the economizer kit has been incorporated with rooftop unit before activate the economizer
function in the controller main board. Else, error will occur.

•

To activate economizer function, set Dip Switch Setting: SW4 - ON (default is OFF) in the controller main
board and panel parameter G6 to ‘1’ (default is ‘0’).

• In economizer controller board, there are 4 dip switches and 3 shunt jumpers which provide flexible
selection based on different requirements:

– Dip Switch 1: Minimum fresh air opening setting in heating mode, where by the selection of

different pins will give different opening setting. SW1: 5%, SW2: 10%, SW3: 15%,
SW4: 20%, SW5: 25%, SW6/7/8:

no function, Default: 0% (no selection, all OFF).
– Dip Switch 2: Minimum fresh air opening setting in cooling mode, where by the selection of

different pins will give different opening setting. SW1: 0%, SW2: 5%, SW3: 15%,

SW4: 20%, SW5: 25%, SW6/7/8:

no function, Default: 10% (no selection, all OFF).
– Dip Switch 3: CO2 PPM level threshold value selection, where by the selection of different pins

will give different value setting. SW1: 25%, SW2: 50%, SW3: 75%, SW4: 100%,
Default: 0% (no selection, all OFF).

– Dip Switch 4: Type of operation, which include the following selection:­ SW1: OFF = Differential temperature operation (default), ON = No function at this

moment.
SW2: OFF = Economizer mode (default), ON = Fresh air mode.
SW3: OFF = Overcooled protection is not activated (default), ON = Overcooled

protection is activated.

1 2 3 4 5 86 7

ON

OFF

Note:

G6 = Economizer control
0 = disable
1 = enable.

15

Shunt jumper 1, 2 and 3: Minimum fresh air opening setting in fan mode, where by the selection of

different pins will give different opening setting. Let name the shunt jumper 1 = JP1, shunt jumper 2
= JP2 and shunt jumper 3 = JP3; refer the table below for different fresh air opening selection:-

Fresh air opening (%) JP1 JP2 JP3

0 (default) OFF OFF OFF

10 OFF OFF ON
20 OFF ON OFF
30 OFF ON ON
40 ON OFF OFF
50 ON OFF ON
70 ON ON OFF
85 ON ON ON

Legend: OFF = Short pin 2 and pin 3

ON = Short pin 1 and pin 2

CAUTION

Dip Switch 1, 2 and 3 allow only 1 pin selection. Multiple pins selection will cause error and the operation will go
back to default setting. While Dip Switch 4 allow multiple pins selection.

Location of dip switches and shunt jumpers
in the economizer controller board:

Indication on the economizer controller board:

Shunt jumper 1

Shunt jumper 2

Shunt jumper 3

Dip Switch 3

Indication for the

means of selection

for Dip Switch 1.

Indication for the
means of selection
for Dip Switch 3.

Indication for the

means of selection

for Dip Switch 2.

Indication for the
means of selection
for Dip Switch 4.

Dip Switch 4

Dip Switch 2

Dip Switch 1

Indication for the means of selection for shunt

jumper 1, 2 and 3.

16

Sound Data

Outdoor Noise Level

Coil

Mic. position 1

Mic. position 2

Mic. position 3

Discharge air flow

Note:- Microphone position: 1m away from every side of the unit and 1m above floor level

63Hz 125Hz 250Hz 500Hz 1kHz 2kHz 4kHz 8kHz

M5RT90BR

77 76 64 65 63 60 55 48
78 75 62 60 59 54 50 44 64 65
77 74 61 60 61 54 52 45 65 63
78 82 66 63 63 56 51 45 68 73
85 76 69 66 65 61 53 46 70 66
83 74 70 66 65 62 56 47 70 68

68

66

M5RT120BR
M5RT150BR
M5RT180BR
M5RT210BR
M5RT250BR

M5RT90BR
M5RT120BR
M5RT150BR
M5RT180BR
M5RT210BR
M5RT250BR

63Hz 125Hz 250Hz 500Hz 1kHz 2kHz 4kHz 8kHz

91 91 79 78 78 72 68 61 82
96 91 79 78 80 72 70 64 83
93 90 79 78 80 73 71 64 83
95 96 83 82 84 78 73 66 87
101 94 87 85 87 81 76 69 90
99 91 88 85 86 83 77 69 90

Model

1/1 Octave Sound Power Level (dB, ref 1pW)

Overall

(dBA)

Noise Criteria

(NC)

1/1 Octave Sound Pressure Level (dB, ref 20µPa)

Model

Overall

(dBA)

0152213B

0252213B

17

M5RT90BR NC CURVES

M5RT120BR NC CURVES

10

20

30

40

50

60

70

80

90

63 125 250 500 1000 2000 4000 8000

Octave-band frequency (Hz)

Sound pressure level (dB, ref 20μPa)

NC70

NC45

NC50

NC55

NC60

NC65

NC20

NC25

NC30

NC35

NC40

10

20

30

40

50

60

70

80

90

63 125 250 500 1000 2000 4000 8000

Octave-band frequency (Hz)

Sound pressure level (dB, ref 20μPa)

NC70

NC45

NC50

NC55

NC60

NC65

NC20

NC25

NC30

NC35

NC40

0352213B90

0352213B120

18

M5RT150BR NC CURVES

10

20

30

40

50

60

70

80

90

63 125 250 500 1000 2000 4000 8000

Octave-band frequency (Hz)

Sound pressure level (dB, ref 20μPa)

NC70

NC45

NC50

NC55

NC60

NC65

NC20

NC25

NC30

NC35

NC40

0352213B150

M5RT180BR NC CURVES

10

20

30

40

50

60

70

80

90

63 125 250 500 1000 2000

4000

8000

Octave-band frequency (Hz)

Sound pressure level (dB, ref 20μPa)

NC70

NC45

NC50

NC55

NC60

NC65

NC20

NC25

NC30

NC35

NC40

0352213B180

19

M5RT210BR NC CURVES

10

12563 250 500 1000 2000 4000 8000

20

30

40

50

60

70

80

Octave-band frequency (Hz)

Sound pressure level (dB, ref 20μPa)

0352213B210

M5RT250BR NC CURVES

10

20

30

40

50

60

70

80

63 125 250 500 1000 2000

4000

8000

Octave-band frequency (Hz)

Sound pressure level (dB, ref 20μPa)

0352213B250

20

M5RT90BR

Selection Process

21

Exampleforselectionprocess:

The following data are the rated design points for model R410A rooftop M5RT90BR:
Airow Rate = 3300 cfm
External Static Pressure (ESP) = 150Pa
Blower RPM = 657

To increase the ESP to 200Pa, but maintain the airow rate at 3300cfm, please follow the steps below:

Step1:Selectionofnewdesiredpoint.
From the blower curve, select the point that can meet both of the requirements

(ESP = 200Pa and airow rate = 3300cfm).

Step2:ReadRPMvaluefromtheblowercurve.

Next, refer to the RPM value in the blower curve which is corresponding to this point.

For instance, from the blower curve on the right, RPM which is corresponding to this point = 727.

Step3:Readpowerconsumptionvalueforindoorfanmotor.

Then, use this RPM value to estimate the power consumption of indoor fan motor by referring to the table
of ‘Motor Variable Pitch Pulley Data’. For instance, from the table, indoor fan motor with 727RPM consumes
1000W.

Step4:Readnumberofturnsforvariablepitchpulley.

Similarly, use this RPM value to read the no. of turns (N) by referring to the table of ‘Motor Variable Pitch Pulley
Data’. The variable pitch pulley for motor shall be adjusted to this ‘N’ in order to achieve the desired point

(ESP = 200Pa and airow rate = 3300cfm). For instance, from the table, no. of turns (N) = 1.5 in order to get

727RPM. First, adjust the motor pulley to 0 turns. Then, makes 1 and half turns on the pulley. Cross check the

dimension ‘X’, which stands for regulation space of motor pulley. In this case, X = 3.5mm.

22

MotorVariablePitchPulleyData:

Date is provided according to factory tted standard motor and blower. The range of airow & ESP must be

worked within blower curve boundary.

N 0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4

X 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5
Fan Speed (RPM) 738 733 727 722 716 711 704 698 691 683 676 670 663 656 650 643 638
Power Input (W) 2005 1950 1890 1830 1770 1715 1660 1605 1550 1490 1420 1350 1275 1205 1130 1060 990
Fan Speed (RPM) 760 754 748 741 735 728 721 713 706 699 691 684 676 668 660 652 645
Power Input (W)

2690 2590 2495 2390 2295 2190 2095 2005 1905 1815 1725 1650 1575 1515 1455 1390 1350

Fan Speed (RPM)

820 815 810 805 800 793 787 780 773 765 758 750 742 734 726 718 710

Power Input (W)

3775 3660 3545 3450 3350 3250 3140 3030 2920 2810 2700 2590 2480 2370 2275 2185 2100

Fan Speed (RPM)

890 882 873 864 855 846 837 828 820 811 802 793 784 775 766 757 748

Power Input (W)

5450 5300 5150 5010 4870 4720 4580 4440 4300 4160 4010 3870 3720 3570 3410 3240 3070

Fan Speed (RPM)

889 880 871 862 853 844 835 826 818 810 802 794 786 778 770 762 754

Power Input (W)

5570 5460 5320 5180 5040 4900 4760 4620 4500 4380 4260 4140 4020 3900 3780 3660 3540

Fan Speed (RPM)

1004 994 984 974 964 954 944 933.8 924 914 904 894 884 874 864 854 844

Power Input (W)

9430 9155 8880 8605 8330 8055 7780 7505 7230 6955 6680 6405 6130 5855 5580 5305 5030

N 0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4

X 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5
Fan Speed (RPM) 750 744 738 733 727 721 714 708 701 693 686 678 671 664 657 650 643
Power Input (W) 1790 1720 1645 1580 1510 1445 1375 1325 1270 1205 1130 1045 955 870 800 755 715
Fan Speed (RPM) 769 762 755 748 741 734 727 720 713 706 698 690 682 673 665 657 650

Power Input (W) 2300 2205 2105 2000 1900 1800 1700 1610 1530 1460 1380 1300 1230 1160 1110 1060 1000
Fan Speed (RPM) 833 827 821 814 807 801 795 788 780 771 765 759 752 745 737 727 717
Power Input (W) 3440 3330 3220 3110 3000 2890 2780 2670 2560 2450 2340

2230 2120 2020 1910 1830 1740
Fan Speed (RPM) 882 875 868 861 853 846 838 830 821 812 804 796 788 779 770 761 752
Power Input (W) 5210 5050 4890 4720 4550 4400 4260 4100 3930 3770 3620 3480 3340 3190 3030 2890 2750
Fan Speed (RPM) 892 883 874 865 856 847 838 829 821 813 805 797 789 781 773 765 757
Power Input (W) 5270 5160 5020 4880 4740 4600 4460 4320 4200 4080 3960 3840 3720 3600 3480 3360 3240
Fan Speed (RPM) 1008 998 988 978 968 958 948 938 928 918 908 898 888 878 868 858 848
Power Input (W) 8910 8645 8380 8115 7850 7585 7320 7055 6790 6525 6260 5995 5730 5465 5200 4935 4670

N 0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4
X 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5

Fan Speed (RPM)

763 757 751 744 738 733 727 721 715 708 700 693 685 677 669 661 653

Power Input (W)

1370 1320 1265 1195 1130 1065 1000 950 905 850 790 725 650 605 555 510 460

Fan Speed (RPM)

776 769 762 755 748 741 733 726 718 711 703 695 687 679 671 663 655

Power Input (W)

1910 1830 1740 1650 1560 1470 1390 1300 1210 1140 1055 985 920 850 790 740 690

Fan Speed (RPM)

842 836 830 823 817 811 805 796 788 781 773 764 755 746 738 731 723

Power Input (W)

3080 2980 2890 2780 2670 2560 2450 2340 2230 2120 2020 1910 1820 1730 1620 1520 1420

Fan Speed (RPM)

889 882 875 868 861 853 845 837 828 819 810 801 792 783 774 765 757

Power Input (W)

4670 4520 4370 4210 4060 3900 3750 3600 3430 3260 3090 2920 2750 2580 2470 2330 2230

Fan Speed (RPM)

896 887 880 873 864 855 846 837 828 819 811 802 793 784 778 768 759

Power Input (W)

4950 4710 4570 4430 4290 4150 4010 3870 3870 3730 3590 3450 3310 3170 3030 2890 2750

Fan Speed (RPM)

1010 1000 990 980 970 960 950 940 930 920 910 900 890 880 870 860 850

Power Input (W)

8180 7925 7670 7415 7160 6905 6650 6395 6140 5885 5630 5375 5120 4865 4610 4355 4100

N 0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4
X 0.5 1 1.5 2

2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5
Fan Speed (RPM) 894 887 880 871 866 857 850 841 832 826 817 808 798 790 778 773 761
Power Input (W) 4310 4120 4050 3890 3630 3560 3370 3220 3020 2930 2780 2730 2570 2370 2210 2030 1960
Fan Speed (RPM) 898 893 886 877 868 859 850 841 832 823 814 805 796 787 778 769 761
Power Input (W) 4690 4550 4410 4270 4130 3990 3850 3690 3530 3370 3210 3050 2890 2730 2570 2410 2250
Fan Speed (RPM) 1013 1003 993 983 973 963 953 943 933 923 913 903 893 883 873 863 853

Power Input (W) 7560 7315 7070 6825 6580 6335 6090 5845 5600 5355 5110 4865 4620 4375 4130 3885 3640

Legend: X: Regulation Space of Motor Pulley (mm)

N: Number of Turns
ESP: External Static Pressure (mmAq)

: Data is out of blower curve (for reference only)

210

250

250Pa

: Factory Set Point

External Static Pressure (ESP)

External Static Pressure (ESP)

External Static Pressure (ESP)

Models
R410A
Rooftop

250

120

150

180

90

210

250

External Static Pressure (ESP)

Model 90/120/150/180/210/250 = 150Pa

Model 90/120/150 = 200Pa, Model 180/210/250 = 210Pa

210

150

210

150

180

Model 90/120/150/180/210/250 = 100Pa

180

90

250

90

120

120

180

Models
R410A
Rooftop

Models
R410A
Rooftop

Models
R410A
Rooftop

0952213B

23

Motor Pulley Dimensions

(Note: All dimensions are in mm)

(Note: All dimensions are in mm)

Medium Min - Max

VPT139A1 121 109 - 133 35 1
VPT139A1 121 109 - 133 35 1
VPT139A2 121 109 - 133 70 2
VPT139A2 121 109 - 133 70 2
VPT139A2 121 109 - 133 70 2
VPT139A2 121 109 - 133 70 2

Legend: PD: Pitch Diameter of Motor Pulley (mm)

V-Belt Dimensions

A 12.7 10 40 1657 1382 1
A 12.7 10 40 1782 1357 1
A 12.7 10 40 1657 1250 2
A 12.7 10 40 1932 1382 2
A 12.7 10 40 1957 1382 2
A 12.7 10 40 1907 1382 2

210

445

510
590

375
388

515

PD

Pulley Type

Quantity

(pcs)

Pulley center

distance (mm)

Models R410A Rooftop

(M5RT-BR)

250

V-belt

length

Down flow

Pulley center

distance(mm)

Section

Nominal

Angle (º)

V-belt
length

Nominal

Side flow

90
120
150
180

Quantity (pcs)Total Length

250 690 435

210 710

180

Models R410A

Rooftop

(M5RT-BR)

Top Width

90

120

445

150

Thickness

710

375

X

Y

PD

140

104

0952213B

0952213B

24

BlowerCurves

M5RT90BR

0

50

100

150

200

250

300

350

400

450

2600 2800 3000 3200 3400 3600 3800 4000

Air Flow

)aP(erusserPcitatSlatoT

800

700

600

500

Internal
Static
Pressure

Standard
Point

400

CFM

900

1.5 kW

1.1 kW

0.75 kW

MPR

L/S

1800

1500

14001300

1600

1700

Note : The shaded area indicates the operating range of variable picth pulley which is used with
standard motor(factory fitted). In case if the operation is out of range, change pulley or/and motor size

0752213B90

25

M5RT120BR

50

100

150

200

250

300

350

400

450

500

550

600

3200 3500 3800 4100 4400 4700 5000 5300

Air Flow

T o t a l S t a t i c P r e s s u r e ( P a )

900

800

700

600

Internal
Static
Pressure

Standard

Point

CFM

2.2 kW

1.5 kW

1.1 kW

R P M

L/S

2300

1700

1600

500

1000

1800

1900

2000

2100

2200

2400 2500

Note : The shaded area indicates the operating range of variable picth pulley which is used with standard
motor ( factory fitted ) . In case if the operation is out of range, change pulley or / and motor size.

0752213B120

26

M5RT150BR

700

600

Standard

Point

CFM

3.0 kW

2

.

2kW

1.5

k

W

RPM

800

900

1000

50

100

150

200

300

350

400

450

500

4200 4700 5200 5700 6200 6700 7200

250

L/S

3000

2400

2200

2600

2000

2800

3200

3400

Total Static Pressure (Pa)

Air Flow

Internal
Static
Pressure

Note : The shaded area indicates the operating range of variable picth pulley which is used with standard
motor ( factory fitted ) . In case if the operation is out of range, change pulley or / and motor size.

0752213B150