System Technical Support Request Form – Carrier Enterprise Central Plains Technical Support Site

– Step 1 of 6

This form will walk you thru the needed steps to help assist in checking the operation of your system

All you will need is your normal hand tools to complete the tasks.

Name *

First

Last

Company Name *

Email *

Phone *

Mode of Operation & Conditions

Mode of Operation *

Outdoor Temperature *

Indoor Temperature *

Set Point of control *

Resume Later

First things first, we need to gather the indoor unit information and check airflow

Indoor Unit and Airflow information

Industry standard is 400 +/- 50 cfm per a ton of cooling. Example a 3 ton system our goal is a minimum airflow of 1050 cfm or a maximum of 1350 CFM.

Do you have a gas furnace or fan coil? *

Gas furnace
Fan Coil

Furnace Model # *

Furnace Serial # *

Evaporator Coil Model # *

Evaporator Coil Serial # *

Fan Coil Model # *

Fan Coil Serial # *

Any fault codes flashing or displayed on the LED? *

Code # *

Pictures of the Indoor Unit

Click or drag files to this area to upload. You can upload up to 4 files.

What type of metering device do you have on your indoor unit? *

Piston
TXV

What type of control do you have? *

User Interface Touchscreen (Communicating)
24v control

User Interface

Any fault codes in the USER Interface history? *

Go into the service menu by pressing and holding the service hat icon until it turns green, once in the installation & service menu, page down by pressing the carrot in the bottom right corner and then select service information. Then select last 10 system events.

List the last 10 system events in the USER interface

User Interface Touchscreen (Communicating)

Go into the service menu by pressing and holding the service hat icon until it turns green. Then select the installation option, then select the blower assessment test, start the test, it will take about 3 mins to complete, once the test is complete record the information below.

System CFM *

System Static Pressure *

Blower RPM *

Minimum CFM *

How would you like to check the airflow? (Fan Coil) *

Elect Heat Method – using formula
Static Pressure Method – using product data

How would you like to check the airflow? (Gas Furnace) *

Clock The Meter Method
Static Pressure Method – using product data

Is this a 80% or 90+% efficient furnace? *

80% Furnace Model Families *

58TN/880TA
58TP/820TA
58SP/820SA
58SC/810SA
58SB/800SA
58CVA/315AAV
58STA/310AAV
58CTW/314AAV
58PHA/58PHB/313AAV/313ABV
Not listed(other)

90+% Furnace Model Families *

59MN7/987M
59TN6/986T
59TP6/926T
59SP6/926S
59SC5/915S
59SC2/912S
58MVP
Not listed(other)

58TN/880TA

Board dip-switch settings, 2-stage, ECM

59MN7/987M

Board dip-switch settings, 2-stage, ECM

59TN6/986T

Board dip-switch settings, 2-stage, ECM

58MVP

Board dip-switch settings, 2-stage, ECM

58CVA/315AAV

Board dip-switch settings, 2-stage, ECM

SW1-4 *

SW1-5 *

SW2-1 *

SW2-2 *

SW2-3 *

SW3-1 *

SW3-2 *

SW3-3 *

SW4-1 *

SW4-2 *

SW4-3 *

59TP6/926T

Board dip-switch settings, 2-stage, PWM ECM

58TP/820TA

Board dip-switch settings, 2-stage, PWM ECM

58SP/820SA

Board dip-switch settings, 1-stage, PWM ECM

59SP6/926S

Board dip-switch settings, 1-stage, PWM ECM

SW1-4 *

SW1-5 *

SW2-2 *

SW2-3 *

SW2-4 *

SW2-5 *

SW2-6 *

SW2-7 *

SW2-8 *

58STA/310AAV

Wires, 1-stage, PSC

Color wire used for HEAT *

Black
Blue
Red

Color wire used for Cool *

Black
Blue
Red

58CTW/314AAV

Board dip-switch settings, 2-stage, ECM

SW2-2 *

SW2-6 *

SW2-7 *

SW2-8 *

58PHA/58PHB/313AAV/313ABV

Wires, 1-stage, FCT, multi-speed ECM

58SC/810SA

Wires, 1-stage, FCT, multi-speed ECM

59SC2/912S

Wires, 1-stage, FCT, multi-speed ECM

59SC5/915S

Wires, 1-stage, FCT, multi-speed ECM

58SB/800SA

Wires, 1-stage, FCT, multi-speed ECM

Color wire used for HEAT *

Gray
Yellow
Blue
Orange
Red

Color wire used for Cool *

Gray
Yellow
Blue
Orange
Red

Fan Coil Family *

FV4C
FB4C/FZ4A/FX4D
FMA4X
FMA4P
FH4C/FY5B/FF1E

FV4C

Easy Select Board, motor 16-pin ECM motor. Looking at the board from left to right the 24v connections are to the right.

AUX heat KW/CFM, the violet wire *

Spot 1
Spot 2
Spot 3
Spot 4

AC/HP Size, the blue wire *

Spot 1
Spot 2
Spot 3
Spot 4

System Type, the orange wire *

AC
HP-COMFORT
HP-EFF

AC/HP CFM Adjust, the black wire *

ON/OFF Delay, the white wire *

0/90
30/90
0/0
ENH

Continuous Fan, the yellow wire *

FB4C/FZ4A/FX4D

FCT ECM motor

FMA4X

FCT ECM motor

Tap used for HEAT the white wire *

Tap used for Cool the blue wire *

FMA4P

PSC motor

FH4C/FY5B/FF1E

PSC motor

Color wire used for HEAT *

Yellow
Black
Blue
Red

Color wire used for COOL *

Yellow
Black
Blue
Red

Static Pressure

Record the static pressure with a manometer. Measure the return and the supply separately and then add together to get the total static. Forget the + and – and just add the numbers together. Example +.5 measured in the supply and -.3 measured in the return = .8 in wc Total static. Reminder this is a Blower, not a sucker. DO NOT worry about entering the + or the – or the decimal point(.), just enter the number displayed on your manometer.

Supply Static after the Evaporator coil *

Supply Static for the fan coil *

Supply static between the Furnace and Evaporator coil *

If you do not have a spacer between your gas furnace or coil to get the pressure reading. Yes you will need to drill a hole in the side of the furnace(just in the top 2-3″of the cabinet, and just enough to penetrate the cabinet).

Fan Coil Return Static *

The return static should never exceed .4″

Gas Furnace Return Static *

If there is a add-on filter outside of the gas furnace. Take this measurement between the Add-on filter and the gas furnace.

Fan Coil Total Static *

Now refer back to the product data to evaluate performance against the static pressure charts.

Gas Furnace Total Static *

Now refer back to the product data to evaluate performance against the static pressure charts.

Would you like assistance in locating your product data? *

Please visit Carrier Enterprise’s Main Customer Site. In the top menu bar select Documents. In the search box, input the Model# of your unit. Hit enter or select from the drop down menu. There you will find your installation instructions and product data. Then you just need to scroll in the document you select, until you find the blower performance data charts.

Clocking the gas meter if you have natural gas

All you need is a watch with a second hand or a stopwatch. You can use your phone, it has a clock and a stopwatch.

Note

When checking airflow for cooling operation you must first take the furnace and set it up for cooling airflow when the furnace is operating for this test.

You may have to change the wire speed tap on your motor or IFC.

For the IFC take the wire used on the cool tap of the board and move it to the heating tap of the board for this test.

For a X13/Constant Torque motor take the wire from the heating tap and move it to the cooling tap for this test.

For a variable speed furnace without a User Interface adjust your dip switches to match the cooling airflow as close as possible.

Once the change has been made place the unit in the heating mode and turn off all other natural gas appliances. Go to the gas meter and time how many seconds it takes for the furnace to consume 1 cubic foot of gas. And then measure the temperature spilt of the gas furnace at the furnace.

Would you like to watch a short video on how to do this test? *

Seconds to consume 1 cubic foot of gas *

Return Temperature *

Use the same thermometer to measure the temperatures.

Supply Temperature *

Use the same thermometer to measure the temperatures.

Calculating gas furnace airflow by clocking the gas meter

Verify input BTU of furnace: 3600 sec in an hour / Seconds per a cubic foot of gas the furnace consumed = cubic feet per an hour consumed X AVG BTU content of 1050 = give us the input BTU’s of the furnace. Make sure it is within 2% of input valve listed on the nameplate of the furnace. If not adjust gas pressure. Then take the output rating listed on the nameplate and / temperature split / 1.08 = CFM. Example 3600 secs / 62 sec to consumer 1 cubic foot = 58 cubic feet of gas consumed X 1050 = 60,900 Btu’s Input, Nameplate say 60k input, we are good as long as within 2%. Then look at output rating of the furnace 54kbtu. Take the 54,000 Btu output / your temperature split(52F measured) / 1.08 = 961 CFM.

Electric Heat

Place the unit in emergency heat and run for about 10-15 minutes while you are gathering your measurements, yes even on a 90 degree day. Take the blower door off and measure the High Voltage going to the Fan Coil(you can also get this in the disconnect), after the door is OFF, measure the amp draw of L1 or L2 coming into the fan coil, total system amp draw, while the door is off, get an amp draw of the fan motor. Then place the door back on the unit and measure the temperature split of just the elec. heat at the fan coil.

High Voltage *

This is the power coming to the fan coil.

Total Fan Coil Amp Draw *

Indoor Fan Motor Amp Draw *

Electric Heat Amp Draw *

Take the total measured amp draw of the fan coil and subtract the indoor fan motor amp draw. This will give you the amp draw of just the Elec heat.

Return Temperature *

Use the same thermometer to measure the temperatures.

Supply Temperature *

Use the same thermometer to measure the temperatures.

Electric Heat formula for Residential CFM

VOLTS X AMPS X 3.41 / 1.08 / Elec heat temperature split = CFM

Electric Heat formula for Commercial CFM 3Ph power

VOLTS X AMPS X 3.41 X 1.73 / 1.08 / Elec heat temperature split = CFM

What is your calculated CFM? *

Resume Later

Outdoor unit measurements

Now place the unit in the Cooling mode of operation and let the system operate a minimum of 15 minutes. With a USER Interface you must use CHARGING MODE. Once in Charging mode you must wait until the stabilization timer has counted down to zero before you can start checking your measurements.

What Type of Outdoor unit do you have? *

Heat Pump (Cooling Mode)
Air Conditioner

Condenser Model # *

Outdoor unit

Condenser Serial # *

Outdoor unit

Any fault codes flashing or displayed on the LED? *

Fault Code # *

Pictures of the Condensing Unit

Click or drag files to this area to upload. You can upload up to 2 files.

Pictures of the Outdoor unit

A. Liquid Line Pressure *

B. Liquid Line Temperature *

Calculated Subcooling *

Always look at the data tag for required sub-cooling. Industry standard is around 10 of sub-cooling.

C. Vapor Line Pressure *

D. Vapor Line Temperature *

Calculated Superheat *

Always look at the data tags and unit information to calculate required superheat. There is no magic number.

F. Indoor Liquid Line Temperature *

G. Indoor Vapor Line Temperature *

Outdoor Unit High Voltage *

Outdoor Unit Amp Draw *

Resume Later

Refrigerant Piping Information

Vertical positioning between indoor and outdoor units *

Outdoor and indoor units on same level
Outdoor unit is lower than indoor unit
Outdoor unit is higher than indoor unit

Approximate refrigerant lines LINEAR length (ft) *

The distance between the outdoor unit and indoor unit.

Approximate refrigerant lines EQUIVALENT length (ft) *

This is the total linear length + elbows and turns to connect the two products. Elbows and turns increase the length of the line set pressure drop.

Would you to see a chart to help calculate? *

How much lift between the indoor and outdoor unit? (ft) *

Was a solenoid valve installed? *

For heat pumps any lineset with a length longer then 80′ or has 20′ of vertical lift, should have a solenoid valve installed. For air contioners any lineset with a length longer then 80′ or has 35′ of vertical lift, should have a solenoid valve installed.

Liquid Line size *

1/4
5/16
3/8
1/2

Vapor Line size *

1/2
5/8
3/4
7/8
1
1 1/8

Do the refrigerant lines change size anywhere in the circuit? *

If Yes please describe the change *

Is there a liquid line filter drier installed *

Where is it installed? *

At the outdoor unit
At the indoor unit

Is there a suction line filter drier installed? *

Resume Later

Indoor Cooling Mode operating temperature splits

Picture of thermometers

Pocket thermometer
Fieldpiece PRH2 or similar

Examples of what you could use

Return Dry Bulb Temperature *

Taken at the unit, not the grills.

Supply Dry Bulb Temperature *

Taken at the unit, not the grills.

Return Wet Bulb Temperature *

Taken at the unit, not the grills.

Supply Wet Bulb Temperature *

Taken at the unit, not the grills.

Would you like to calculate your system capacity? *

Sensible Capacity Formula

Dry Bulb Temperature split X 1.08 X CFM = Sensible Capacity

Example

Let’s say you had a Return Dry Bulb temperature of 75F degrees, and a Supply Dry Bulb temperature of 55F degrees, for a total of a 20F degree temperature split.

And our Calculated CFM was 1089

20F X 1.08 X 1089 = 23,522 BTU’s.

Total System Capacity

Enthalpy Difference X CFM X 4.5 = Total Capacity

Example

We had a Return Temperature Wet Bulb reading of 65.3F degrees, and a Supply Temperature Wet Bulb reading of 54.2F degrees.

We need to covert these temperatures into Enthalpy.

Would you like to see an Enthalpy Chart to help convert your WB readings? *

64.3 WB converts to 29.53

54.2 WB converts to 22.74

29.53 – 22.74 = 6.79 Enthalpy difference

Our Calculated CFM was 1089

6.79 X 1089 X 4.5 = 33,274 BTU’s.

Resume Later

Would you like to have a conversation with Technical Support? *

Any other notes or observations?

Contact Information

Name *

First

Last

Dealer Name *

Email *

Phone *

If you all ready working with a Customer Assurance Manager please select them below

This information will be sent to the selected contact. Once the information has been reviewed, a Customer Assurance Manager will reachout to assist you.

Thank you for using this tool. By hitting Submit a copy of this report will be emailed to you.

Resume Later

Your form entry has been saved and a unique link has been created which you can access to resume this form.

Enter your email address to receive the link via email. Alternately, you can copy and save the link below.

Please note, this link should not be shared and will expire in 30 days, afterwards your form entry will be deleted.

Copy Link

Email *