CARRIER

PROGRAMMABLE

THERMOSTAT

MODEL HP

 

 

 

 

 

 

 

 

 

24 VAC HOT

 

R

 

 

 

 

 

 

 

INDOOR FAN

 

G

 

 

 

 

 

 

 

 

 

HEAT STAGE 2

 

W/W1

COOL/HEAT

 

 

 

 

 

 

Y/Y2

STAGE 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RVS COOLING

 

 

 

O/W2

NOT USED

 

 

 

 

 

 

Y1/W2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

24 VAC COM

C

 

 

 

 

 

 

 

NOT USED

 

B

 

 

 

 

 

 

 

 

 

 

TROUBLE

 

L

 

 

 

 

 

 

 

 

 

OPTIONAL

 

S1

OUTDOOR

 

 

SENSOR

 

 

 

 

 

 

S2

CONNECTION

FA, FB, FC, FH

HEAT

FAN COIL WITH

SMART HEAT

PUMP

R

R

 

C

C

Y

 

G

 

O

O

 

W2D

W2

 

W2T

JW1

 

W3

 

Y0

Y

CARRIER

PROGRAMMABLE

THERMOSTAT

MODEL HP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

24 VAC HOT

 

R

 

 

 

 

 

 

INDOOR FAN

 

G

 

 

 

 

 

 

 

HEAT STAGE 2

 

W/W1

COOL/HEAT

 

 

 

 

 

 

Y/Y2

STAGE 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RVS COOLING

 

 

 

O/W2

NOT USED

 

 

 

 

 

Y1/W2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

24 VAC COM

 

C

 

 

 

 

 

 

NOT USED

 

 

B

 

 

 

 

 

 

 

 

 

TROUBLE

 

 

L

 

 

 

 

 

 

 

OPTIONAL

 

 

 

S1

OUTDOOR

 

 

 

 

SENSOR

 

 

 

 

 

CONNECTION

 

 

 

S2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FA, FB, FC, FH

ONE

HEAT

FAN COIL WITH

OUTDOOR

SMART HEAT THERMOSTAT

PUMP

 

 

 

 

 

 

 

 

 

 

 

 

 

R

 

 

R

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C C

Y

G

 

O

O

 

W2D

W2

 

 

CUT

 

JW1

W2T

ODT

 

W3

 

Y0

Y

A97542

A97541

CARRIER

PROGRAMMABLE

THERMOSTAT

MODEL 2S

 

40FKA

 

 

 

FK4C

 

HEAT

FAN COIL

 

PUMP

 

 

 

 

 

 

 

 

 

 

DH

 

 

 

 

 

 

J1 JUMP

ER

 

 

 

 

 

 

 

R

CARRIER

PROGRAMMABLE

THERMOSTAT

MODEL HP

 

 

 

 

 

 

 

24 VAC HOT

 

R

 

 

 

 

 

INDOOR FAN

 

G

 

 

 

 

 

 

 

HEAT STAGE 2

 

W/W1

COOL/HEAT

 

 

 

 

 

 

Y/Y2

STAGE 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RVS COOLING

 

 

 

O/W2

NOT USED

 

 

 

 

 

 

Y1/W2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

24 VAC COM

C

 

 

 

 

 

NOT USED

 

B

 

 

 

 

 

 

 

 

TROUBLE

 

L

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OPTIONAL

 

S1

FA, FB, FC, FH

 

FAN COIL WITH

HEAT

SMART HEAT

PUMP

 

 

 

SUPPLEMENTAL

 

 

 

 

 

HEATING

 

 

 

 

 

 

 

 

 

 

 

 

RELAY

R

 

 

R

 

 

 

 

 

 

 

C C

SHR

Y

G

O O

W2D

W2

 

 

CUT

 

JW1

W2T

SHR

 

ODT

W3

 

Y0

Y

24 VAC HOT

R

 

 

 

 

 

 

 

FAN

G

COOL/HEAT

 

Y/Y2

STAGE 1

HEAT STAGE 2

 

 

 

 

 

W/W1

 

 

 

 

 

 

 

HEAT STAGE 3

 

 

Y1/W2

 

 

 

 

 

 

 

RVS COOLING

O/W2

 

 

 

 

 

 

 

24 VAC COMM

 

 

 

 

 

 

 

 

 

 

 

C

 

 

 

 

 

 

 

RVS HEATING

 

 

B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TROUBLE

 

 

L

 

 

 

 

 

 

 

 

 

OUTDOOR

 

 

 

 

 

 

S1

 

 

 

 

 

SENSOR

 

 

 

 

 

 

 

 

 

 

 

 

 

CONNECTION

 

 

 

 

 

 

S2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R

 

G

 

Y/Y2

Y

 

REMOVE

W1

J2 JUMPER

FOR HEAT

 

STAGING

W2

W2

O

O

C

C

Y1

 

OUTDOOR

 

SENSOR

S2

CONNECTION

A97543

Intelligent Sequencing Application: Model 2S thermostat with switch C OFF and switch D ON uses single-speed heat pump,

FK4 or 40FKA fan coil with selected 2:1 size ratio heaters. Provides 3 stages of auxiliary heat for even heating comfort via W/W1

and Y1/W2. Refer to FK4 or 40FKA Installation Instructions.

A98631

Fig. 11—Typical 24-v Circuit Connections using Carrier Model HP Thermostat with Smart Heat and

No Outdoor Thermostat, 1 Outdoor Thermostat, or 2 Outdoor Thermostats and

Carrier Model 2S Thermostat with FK4C Fan Coil and Intelligent Staging

8

Page 8
Image 8
Carrier 38YSA instruction manual VAC COM Not Used Trouble Optional Outdoor Sensor Connection

38YSA specifications

The Carrier 38YSA is a cutting-edge cooling solution designed to meet the demands of modern residential and commercial applications. Renowned for its energy efficiency and reliable performance, the 38YSA series represents the pinnacle of Carrier’s commitment to innovation in HVAC technology.

One of the standout features of the Carrier 38YSA is its energy efficiency. It utilizes advanced inverter technology, allowing it to adjust its cooling output based on the specific needs of the indoor environment. This technology not only reduces energy consumption but also minimizes fluctuations in temperature, providing a more consistent and comfortable living or working space. The unit achieves impressive SEER (Seasonal Energy Efficiency Ratio) ratings, making it an environmentally friendly choice.

The 38YSA is equipped with a variable-speed compressor, which optimizes performance by operating at different speeds. This capability allows the system to ramp up or down in accordance with the cooling load, ensuring optimal comfort and minimizing energy usage. This technology also translates to quieter operation, making the 38YSA ideal for residential neighborhoods and low-noise environments.

In terms of features, the Carrier 38YSA incorporates smart controls that can be operated remotely via mobile devices. This feature provides users with the flexibility to manage their cooling systems from anywhere, optimizing comfort while on the go. The user-friendly interface allows for easy programming of temperature schedules, further enhancing energy savings and comfort.

Durability is another characteristic that sets the Carrier 38YSA apart. The unit is engineered with robust materials and components designed to withstand harsh weather conditions. Its corrosion-resistant casing and high-quality condenser coils ensure longevity and reliable performance over the years.

Furthermore, the 38YSA is designed with eco-friendly refrigerants, contributing to a reduction in global warming potential, which aligns with increasing environmental regulations. The commitment towards sustainability is evident in Carrier’s entire product line, emphasizing the importance of creating energy-efficient and eco-conscious cooling systems.

Overall, the Carrier 38YSA is a sophisticated and efficient cooling solution, integrating advanced technologies to deliver optimal comfort, reliability, and energy savings. Its blend of innovative features, durable design, and environmental responsibility makes it a top choice for anyone seeking effective air conditioning solutions.