KUHL+

ELECTRONIC CONTROL

COOL WITH ELECTRIC HEAT MODELS

ES12M33A, ES15M33A

EM18M34A, EM24M34A

COMPRESSOR

WIRING DIAGRAM

UI HOLDER ELECTRONICS ASY

C

S

R

OLP

BLACK

RED

BLUE

BLACK

RED

CAPACITOR

GREEN BRACKET TO CHASSIS

BLUE

RV

OD AIR SENSOR

OD COIL SENSOR

RELAY

ID COIL SENSOR

FAN 4

 

RELAY

 

 

 

 

BLACK

FAN 3

 

 

 

 

 

 

 

 

RELAY

 

 

 

 

HEATER

 

 

BLUE

FAN 2

 

 

 

 

 

 

ORANGE

 

RELAY

 

 

 

 

 

 

ORANGE

FAN 1

 

 

 

 

 

 

RED

 

 

 

 

 

 

 

 

RELAY

 

 

 

 

 

 

 

 

HEAT

 

 

DCHRG

 

 

 

 

 

RELAY

 

 

AIR

TO

 

 

 

 

 

 

 

SENSOR

DISPLAY

 

 

 

 

HEAT

 

L2 or ACN

 

 

 

 

 

 

RELAY

 

 

 

 

 

 

 

 

 

 

 

AMBIENT

 

 

 

 

 

COMP

 

 

AIR SENSOR

 

 

 

 

RELAY

 

 

 

 

 

 

 

 

 

 

L1

 

 

 

 

 

 

 

 

BLACK

 

 

 

 

 

 

 

 

WHITE

 

 

 

 

 

WHITE

RED

WHITE

GREEN GREEN/YELLOW

SUPPLY CORD

 

 

 

 

 

 

 

CAPACITOR

 

 

 

 

 

 

 

 

COM

 

 

BROWN

 

 

 

 

 

 

 

 

 

 

 

OR

 

 

M

F A

 

GREEN

MOTOR

 

 

TO CAPACITOR

E

 

 

 

 

 

BRACKET

 

H

 

N

 

 

 

 

 

 

R

 

 

 

 

 

 

 

 

 

 

TO INNERWALL/

 

 

 

 

 

 

 

 

MOTOR MOUNT

 

 

 

 

 

SCHEMATIC

L1

 

 

 

HIGH

 

USER INTERFACE

 

L2

(230/208 V)

 

 

 

 

 

 

 

3

F3

MEDIUM

 

 

R

 

 

 

 

 

 

 

 

 

 

 

2

F2

LOW

 

OLP

FAN MTR

 

 

 

 

 

 

 

 

COM

 

1

F1

 

 

 

S

FAN

 

ELECTRIC HEAT

 

 

 

 

 

 

 

 

 

 

CAP

 

 

 

 

 

 

 

 

6

EH1

HL

HTR

TF

 

 

 

 

 

ELECTRIC HEAT

 

 

 

 

 

7

EH2

 

 

 

 

 

 

 

 

L2 OR N

 

 

 

R

 

 

 

 

 

 

 

OLP

 

 

 

 

 

 

 

 

 

 

 

 

 

COMPRESSOR

 

C

COMPRESSOR

 

L1

5

COMP

 

 

 

 

 

 

 

HERM

COM

 

 

 

 

 

 

S

 

 

 

 

 

 

 

 

ELECTRONIC CONTROL

 

 

 

 

CAP

 

 

 

L E G E N D

 

 

 

CAP

- CAPACITOR

COMPR - COMPRESSOR

MTR

- FAN MOTOR

OLP

- OVERLOAD PROTECTOR

UI

- USER INTERFACE

TF

- THERMAL FUSE

HL

- HEATER LIMIT FUSE

T

- THERMISTER

 

 

- COMBINATION TERMINAL

 

- GROUNDED LEAD SYMBOL

 

- INSULATOR

HTR - HEATER ELEMENT

PART NO.

REV.

92170002

04

71

Page 72
Image 72
Friedrich R-410A KUHL+ Electronic Control Cool with Electric Heat Models, ES12M33A, ES15M33A EM18M34A, EM24M34A

R-410A specifications

Friedrich R-410A is an advanced refrigerant widely used in HVAC (Heating, Ventilation, and Air Conditioning) systems, known for its high efficiency and environmental friendliness. As a hydrofluorocarbon (HFC) blend, R-410A has become the preferred alternative to R-22, which is being phased out due to its ozone-depleting potential. One of the main features of R-410A is its high latent heat of vaporization, which allows for efficient heat transfer and improved cooling performance in air conditioning units.

Technologically, R-410A operates at higher pressures than older refrigerants, meaning systems designed for R-410A need to be built with more robust components to safely handle these pressures. This results in a more compact system design that offers enhanced performance and reliability. The dual-component nature of R-410A—composed of difluoromethane (R-32) and pentafluoroethane (R-125)—provides an optimal balance of thermodynamic properties, leading to superior energy efficiency, especially in variable speed applications.

In terms of characteristics, R-410A has a higher cooling capacity, which enables HVAC systems to effectively cool larger spaces or run more efficiently when cooling smaller areas. The refrigerant is non-toxic and non-flammable, which enhances safety during its use. In addition, R-410A has a lower global warming potential relative to other refrigerants, making it a more environmentally responsible choice for modern cooling systems.

Moreover, R-410A systems typically require less refrigerant charge due to their efficiency, contributing to reduced greenhouse gas emissions. The adoption of R-410A aligns with regulatory trends aimed at minimizing the environmental impact of refrigerants in cooling applications.

Overall, the Friedrich R-410A refrigerant embodies a combination of technology and environmental stewardship, making it a cornerstone of contemporary HVAC design. Its ability to provide effective and energy-efficient cooling solutions while being compliant with modern environmental regulations positions R-410A as the refrigerant of choice for engineers and installers focused on sustainability and performance in air conditioning systems.