16

8

6

0

0

2

4

6

8

IO

12

14

16

1 8

2 0

RESET REFERENCE SIGNAL (4 - 20 MA INPUT)

Fig. 7 - 4-20 mA Cooling Temperature Reset

Example 7A - Using Demand Limit (First Log On as Shown in Table 11)

Example 7B - Using Demand Limit (4-20 mA) (First Log On As Shown in Table 11)

KEYPAD DISPLAY

ENTRY RESPONSE

FLD CFG

ERTYP 0

LSTYP 0

LSTYP 1

DEMAND

DLSl 100

DLSl 60

DLS2 100

DLS2 40

To Disable Demand Limit:

COMMENTS

Field configuration sub- function of service function

Scroll past other elements in the subfunction

Loadshed is not enabled

Loadshed is now enabled for 2-stage switch control

Demand Limit set points subfunction of set point function

Loadshed 1 currently set at 100%

Loadshed reset to 60%

Loadshed 2 currently set at 100%

Loadshed 2 reset to 40%

KEYPAD

 

DISPLAY

 

 

COMMENTS

 

ENTRY

 

RESPONSE

 

 

 

 

 

 

 

 

ppiq

 

FLD CFG

Field

configuration

subfunction

 

of service function

 

 

 

 

 

 

 

 

 

t

 

ERTYP 0

Scroll past other elements in

 

 

the

subfunction

 

0

 

 

 

 

 

 

Cl

 

LSTYP 0

Loadshed

is not enabled

 

 

 

 

 

 

 

 

 

q ‘nENTR

 

LSTYP

2

Loadshed

is now enabled

 

 

for 4-20 mA signal control

 

MH

 

DEMAND

Demand

Limit set

points

 

 

 

 

DMAX

100

Maximum demand limit is 100%

 

 

 

 

DMAX

90

Maximum demand limit is 90%

 

 

 

 

RMAX 20

Maximum

demand

limit

 

 

 

 

reference is 20 mA

 

 

 

 

 

 

 

 

 

 

 

 

RMAX

15

Maximum

demand

limit

 

 

 

 

reference is 15 mA

 

 

 

 

 

 

 

 

 

 

 

 

DMIN

0

Minimum demand limit is 0%

 

 

 

 

DMIN

20

Minimum demand limit is 20%

 

 

 

 

RMIN

4

Minimum

demand

limit

 

 

 

 

 

 

 

 

KEYPAD

DISPLAY

 

COMMENTS

ENTRY

RESPONSE

 

 

 

 

 

 

FLD CFG

 

Field configuration sub-

 

 

 

 

 

 

function

of servicefunction

 

 

 

 

 

 

 

ERTYP 0

 

Scroll past other elements

 

 

I

in the

subfunction

 

 

 

 

 

 

 

 

 

 

 

 

LSTYP

1

 

Loadshed

is enabled for

 

 

 

2-stage switch control

 

 

 

 

 

 

 

LSTYP

0

 

Loadshed

is now disabled

 

 

 

 

 

 

 

 

reference is 4

mA

RMlN 6

Minimum demand limit

reference is 6

mA

 

NOTE: Select 3 for Carrier comfort Network (CCN) load limiting Select 4 for CCN demand limiting.

4 3

Page 43
Image 43
Carrier 040-420 specifications Keypad Display Entry Response, FLD CFG Ertyp Lstyp Demand, Ppiq

040-420 specifications

The Carrier 040-420 is a highly regarded commercial HVAC unit specifically designed for efficient heating and cooling in medium- to large-sized buildings. Known for its reliability and advanced technology, this system is ideal for a variety of applications ranging from offices to industrial spaces.

One of the main features of the Carrier 040-420 is its energy efficiency. The unit utilizes advanced compressors and a high-efficiency heat exchanger, which work together to minimize energy consumption while maximizing performance. This is crucial in today’s energy-conscious environment, as businesses strive to reduce operational costs and their carbon footprint. The unit also boasts a high SEER (Seasonal Energy Efficiency Ratio) rating, making it an attractive option for those looking to lower their utility bills.

Equipped with advanced inverter-driven technology, the Carrier 040-420 allows for precise control of indoor climate conditions. This means that the system can adjust its output according to the actual cooling or heating demand of the space, resulting in enhanced comfort and reduced energy waste. The inverter technology also contributes to quieter operation, allowing for a more pleasant indoor environment.

Another feature that sets the Carrier 040-420 apart is its smart controls. The unit can be integrated with Carrier’s Building Automation Systems, enabling remote monitoring and management. This allows facility managers to optimize energy use and immediately respond to any performance issues. Additionally, the unit is compatible with various control interfaces, making it easy for users to adjust settings or schedule operations according to the building's occupancy patterns.

The robust design of the Carrier 040-420 ensures longevity and durability, even in harsh environmental conditions. Its weatherproof casing protects the internal components, enhancing the unit's performance and reliability over time. Maintenance is simplified with accessible design features, allowing technicians to conduct service checks and repairs without extensive downtime.

Overall, the Carrier 040-420 stands out as a modern HVAC solution that combines energy efficiency, advanced technologies, and user-friendly features. Its commitment to performance and sustainability makes it an ideal choice for businesses looking to enhance comfort while being mindful of their energy consumption. With its blend of innovation and reliability, the Carrier 040-420 continues to be a preferred option in the commercial HVAC market.