Carrier 040-420 specifications Example 9 Using the Schedule Function, Display

Page 46

The schedule function can be programmed for inactive, single set point, or dual set point operation.

When schedule is configured for inactive, chilled water pump relay remains energized continuously but is not used since chiller is usually controlled by remote chilled water pump interlock contacts.

When unit is configured for single set point operation, chilled water pump relay is energized whenever chiller is in occupied mode regardless of whether chiller is running. When chiller is in unoccupied mode, chilled water pump relay is not energized.

When unit is configured for dual set point, chilled water pump relay is energized continuously, in both occupied and unoccupied modes. Occupied mode places occupied chilled water set point into effect; unoccupied mode places unoc- cupied chilled water set point into effect.

The schedule consists of from one to 8 occupied time pe- riods, set by the operator. These time periods can be flagged to be in effect or not in effect on each day of the week. The day begins at 00 .OO and ends at 24.00. The machine is in unoccupied mode unless a scheduled time period is in ef- fect, If an occupied period is to extend past midnight, it must be programmed in the following manner: occupied pe- riod must end at 24:OO hours (midnight); a new occupied period must be programmed to begin at 0O:OO hours.

NOTE: This is true only if the occupied period starts at 0O:OO (midnight). If the occupied period starts at a time other than midnight, then the occupied period must end at 0O:OO hours (midnight) and new occupied period must be programmed to start at 0O:OO in order for the chiller to stay in the occupied mode past midnight.

The time schedule can be overridden to keep unit in oc- cupied mode for one, 2, 3 or 4 hours on a one-time basis. See Example 9.

All subfunctions of schedule function are password pro-

tected except the override subfunction, 17 b[ . Pass-

word entry into subfunctions f;l b[ through m m b[,

is done through service function. See page 44, logging on/ logging off.

Figure 9 shows a schedule for an office building with the chiller operating on a single set point schedule. The sched- ule is based on building occupancy with a 3-hour off-peak cool-down period from midnight to 3 a.m. following the weekend shutdown. To learn how this sample schedule would be programmed, see Example 9.

NOTE: This schedule was designed to illustrate the pro- gramming of the schedule function and is not intended as a recommended schedule for chiller operation.

Example 9 - Using the Schedule Function

 

 

DISPLAY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O V R D

0

 

No

 

schedule

override

 

 

 

 

 

in

effect

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O V R D

3

 

3

hours

 

override

in

effect

 

 

 

O V R O

0

 

Override

 

 

cancelled

 

 

 

 

 

C L O C K

0

 

Schedule

function

is

inactive

 

 

 

CLOCK 1

Schedule

 

function

is

enabled

 

 

 

through

 

local

unit

clock

 

 

 

 

 

 

 

 

 

 

 

 

 

CLOCK

65

 

Schedule

function is enabled

 

 

 

 

 

 

 

throuah

 

CCN

clock

65

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PERIOD

1

 

Define

schedule period

1

 

 

 

 

Start

of

 

occupied

time

 

 

 

 

 

 

 

 

For

this

example,

first

 

 

 

 

 

 

 

 

period should stat-t here

 

 

 

 

 

 

 

/;tntnnr$ht) so no entry

 

 

 

 

 

 

 

Start

of

unoccupied

time

 

 

 

 

 

 

 

 

 

 

UN0

00.00

 

(end of period) For this

 

 

 

 

 

&xampl&

 

period 1 should

 

 

 

 

 

 

 

end at 3:00 a m.

 

 

 

 

 

 

 

 

 

 

Period 1 ends at 3:00 a m

 

 

 

 

 

 

 

Monday is now flagged no

 

 

 

 

 

 

 

for oeriod 1 To out oeriod I

 

 

 

MON

NO

into’ effect on

M&day,

 

 

 

 

 

 

 

 

Monday

 

must

be

flagged

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

MON

YES

Monday is now fla ged for

 

 

 

period 1 to be in eaect

 

 

 

 

 

 

 

 

For this example, period 1

 

 

 

 

 

 

 

is to be in effect on Monday

 

 

 

TUE

YES

only All other days must be

 

 

 

checked to be sure that thev

 

 

 

 

 

 

 

 

 

 

 

 

 

 

are flagged no. If any day ii

 

 

 

 

 

 

 

flagged yes, change to no

 

 

 

TUE NO

Tuesday

 

is

now

flagged

 

 

 

 

no for period 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PERIOD 2

Define

 

schedule

period

2

 

 

 

occ

00

00

 

Start

of

occupied time

 

 

 

 

occ 7 00

C$uo$e;;me will start

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Start

of

unoccupied

time

 

 

 

UN0

00.00

 

(end of period) For this

 

 

 

 

 

example, period 2 should

 

 

 

 

 

 

 

end at 18:00 (6:00 p m )

 

 

 

UN0

18 00

 

Period 2 ends at 18:OO

 

 

 

 

 

(6:00 p

 

m

)

 

 

 

 

 

 

 

 

 

 

 

Monday is now flagged no

 

 

 

MON

NO

for period 2 To put period 2

 

 

 

into

effect

on

Monday,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Monday must be flagged yes

 

 

 

MON YES

Monday is now flagged for

 

 

 

period 2 to be in effect

 

 

 

 

 

 

 

 

Tuesay is now flagged no

 

 

 

 

 

 

 

for period 2 To put period 2

 

 

 

TUE

NO

into

effect

on

Tuesday,

 

 

 

 

 

 

 

 

Tuesday

 

must

be

flagged

 

 

 

 

 

 

 

yes

 

 

 

 

 

 

 

 

 

 

 

 

TUE

YES

Tuesday is now flagged for

 

 

 

period 2 to be in effect

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

For this example, period 2

 

 

 

 

 

 

 

is to be in effect only on

 

 

 

 

 

 

 

Monday

 

and

Tuesday

 

 

 

 

WED YES

All other days must be

 

 

 

 

 

 

 

 

checked to be sure that

 

 

 

 

 

 

 

 

they are flagged no. If

 

 

 

 

 

 

 

 

a day is flagged yes,

 

 

 

 

 

 

 

 

change

 

to

no

 

 

 

 

 

 

 

W E D N O

Wednesday

is

now

flagged

 

 

 

no

for

 

period

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CCN - Carrier Comfort Network

Example 9 continued next page.

4 6

Page 45 Page 47
Image 46
Page 45 Page 47
Contents Contrc Unit Sizes and Modular Combinations Unit ModelRELAY, B Keypaddisplay Ground Fault InterrupterSource PSI FieldThermistor and Transducer Locations LOCAL/ENABLE-STOP-CCN Switch Positions and OperationCompressor Protection Control Module Cpcs ThermistorsLoading Sequence a Loading Sequence B Unit Control CapacityControl Steps Steps060A\~**Hz Capacity Control Steps, 040-070 cantLoading Sequence a Loading Sequence B Unit Oy&ya Capacity Control Steps, 040-070 cantFBI 08Aqy,y AitiA4l&pi’ Steps BP’Loading Loading Sequence B Unit Control Altt Altt BittWtf2Z$’ Loading Sequence a Loading Equence B Unit’tt Amrox$-t&Z3 Loading Sequence a Quence B Unit Control Displacement Compressors UWrW Arwox A2.p $#l 110 50 HzAlt,Blv Loading Equence a Displacement Compressors MvroxEquence B 130,24OA Awrox Drt,t130, 24OA 130, 240AAttll’ Loading Equence a UnitT3g A2.pLoading Sequence a Sequence B Unit $$V LOAD11 Control Size StepsLoadin Sequence B Unit B2,B3 Displacement Compressors UVvW PWprox8514w Al% Al’,BILoading Sequence B Unit Capacity Control Steps, 225, 250,280 30GT Displacement Compressors AwoxLoac \IG Sequence a Loading Sequence B Unit Loac Capacity Control Steps, 225, 250,280 cant30GT 1G Sequence a Capacity Control Steps, 225, 250, 280 cant250 Loading Sequence B Unit ControlCondenser Fan Sequence FAN Arrangement FAN Numbers Contactor Controlled~jACToR Condenser Fan Sequence cantFAN Arrangement FAN Numbers 30GT250 60 HzKeypad and Display Module Also Called Hsio Keypad and Display Module UsageFunctions Accessing Functions and SubfunctionsFunctions and Subfunctions Operation Keypad Display Description Entry ResponseKeypad Directory Pressure Keypad Directory cant Status cantSubfunction Keypadentry Display Comment AnalogOutputs Subfunction Outputs DisplaySubfunction Keypad Entry Display Comment Outputs HgbraClock Select Keypad Directory cant Test cantSubfunction Keypad Entry Display Comment Override QzqKeypad Directory Schedule cant Keypad Directory cant Service cord Keypad Directory cant Example 1 Reading Alarm Codes Operationat and Mode Display CodesExample 2 Reading Current Operating Modes Local on Cool Alarms Modes Local on M O D EKeypad Display Example 4 Reading and Changing Chilled Water Set Point Example 3 Using Test FunctionKeypad Display Comments Entry Response CRST2 Example 5 Using Return Water Temperature ResetKeypad Display Comments CrstiExample 6 Changing Reset Type Reset Reference Temperature Outdoor AIR 1OR Space TempEKE FLD CFG Ertyp Lstyp Demand Keypad Display Entry ResponsePpiq Demand Limiting Example 8 Setting Time of Day Day of WeekMAX Demand Kimax = Factory Configuration Keystrokes Adjustable Field ConfigurationsExample 9 Using the Schedule Function DisplayExample 9 Using the Schedule Function cant Example 10 Holiday Schedule FunctionTypical Stoppage Faults and Reset Types Complete Unit Stoppage Complete unit stopAlarm Codes Action Taken Probable Cause N T R O LPage Page ’ Sl R ’ STnanz Compressor Contactor Relay SwitchCGF SNBFig. IOD 24-V Safety Circuit Wiring 225, 250, and 280 Units Electronil c Expansion Valve EXV Page Thermistor and Pressure Transducer Locations Suction Refrigerant Temperature Sensor T7, T8 040-210Associated Modular Units Pressure Transducer 2i.b Voltage Drop Voltage Resistance DropEqualizer OIL Pressure Suction Pressure Sight Glass Line Transducer Each CompressorControl Modules PSIO, SIO Address SelectorSensor Bus Wiring Communications Processor Module PsioComm Troubleshooting 1NO. of Accessory Standard and Accessory UnloadersCircuit Circuit B Or2 30GN190-210 3OGT225,250,280 Accessory Unloader Control Wiring 080-110 SO/SO Hz and 130 60 HzHgbpr TLNModule Contactor Switch Circuit Breaker TransformerLmyTEF4 STAGE2Thermistor ModuleJ7-15 ElJ7-16Installation Remote Dual Set Point ControlPage Page Copyright 1994 Carrier Corporation

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.
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