Carrier 48XL Fire and Unit Damage Hazard, U.S.A, Canada, Example, 5001-6000

Page 23

CARBONMONOXIDEPOISONINGHAZARD

Failureto follow this warning could result in personal iniury and/or death.

If the manifold pressure and/or gas rate is not properly

adjusted on HI and LO stages, excess carbon monoxide can be produced.

FIRE AND UNIT DAMAGE HAZARD

Failure to follow this warning could result in personal iniury or death and/or property damage.

Unsafe operation of the unit may result if manifold pressure is outside of the ranges listed in Table 6.

Gas input rates on rating plate are for installations at altitudes up to 2000 ft (610 m). Input rate must be within - 2% of rating plate input.

1.Determine the correct gas input rate.

a.The rated gas inputs shown in Table 4 are for altitudes from sea level to 2000 ft (610 m) above sea level. These inputs are based on natural gas with a heating value of 1050 Btu/ft3 at .65 specific gravity.

IN THE U.S.A.:

The input rating for altitudes above 2,000 ft (610 m) must be reduced by 4 percent for each 1,000 ft (305 m) above sea level.

For installations below 2,000 ft, (610 m) refer to the unit rating plate.

For installations above 2,000 ft, (610 m) multiply the input by on

the rating plate by the derate multiplier in Table 6 for the correct input rate.

Table 5 - Altitude Derate Multiplier for U.S.A.

Altitude ft (m)

Percent of Derate

Derate Multiplier

Factor*

0-2000

 

 

(0-610)

0

1.00

2001-3000

 

 

(610-914)

8-12

0.90

3001-4000

 

 

(915-1219)

12-16

0.86

4001-5000

 

 

(1220-1524)

16-20

0.82

5001-6000

 

 

(1524-1829)

20-24

0.78

6001-7000

 

 

(1829-2134)

24-28

0.74

7001-8000

 

 

(2134-2436)

28-32

0.70

8001-9000

 

 

(2139-2743)

32-36

0.66

9001-10,00036-400.62

(2744-3048)

:'Derate multiplier factors are based on midpoint altitude for altitude range,

IN CANADA:

The input rating for altitudes from 2,000 (610 m) to 4,500 ft (1372

m)above sea level must be derated 10 percent by an authorized

Gas Conversion Station or Dealer.

EXAMPLE:

90,000 Btuh Input Furnace Installed at 4300 ft (1372 m).

Furnace Input Rate

 

Derate Multiplier

Furnace

Input Rate

at Sea Level

X

Factor

at Installation

Altitude

 

 

 

 

90,000

X

0.90

=

81,000

b. When the gas supply being used has a different heating value or specific gravity, refer to national and local codes, or contact your distributor to determine the required orifice size.

2.Adjust manifold pressure to obtain low stage input rate (See Fig. 19).

a.Turn off gas supply to unit.

b.Remove pipe plug on manifold (See Fig. 20) and

connect manometer. Turn on gas supply to unit.

c.Turn gas valve switch to ON.

d. Set unit to run for 20 minutes in low-stage gas heat

operation using the "INSTALLER CHECKOUT" menu on the User Interface.

e. Remove regulator adjustment cap from low stage gas valve pressure regulator (See Fig. 19) and turn

low-stage adjusting screw (3/16 or smaller flat-tipped

screwdriver) counterclockwise (out) to decrease rate and

clockwise (in) to increase input rate.

1/2" NPT iNLET

1/2' NPT OUTLET J

_

PDAE_'/FOLDE TAP

A04167

Fig. 19 - Redundant Automatic Gas Control Valve

NOTE: DO NOT set low stage manifold pressure less than 1.4 IN. W.C. or more than 2.0 IN. W.C. for natural gas. If manifold pressure is outside this range, change main burner orifices.

f. Re-install low stage regulator adjustment cap.

g. Leave manometer connected.

NOTE: If orifice hole appears damaged or it is suspected to have

been re-drilled, check orifice hole with a numbered drill bit of the

correct size. Never re-drill an orifice. A burr-free and squarely aligned orifice hole is essential for proper flame characteristics.

3.Verify natural gas low stage input rate.

a.Turn off all other gas appliances and pilots served by the gas meter.

b.If unit is not running, set unit to run for 20 minutes in

low-stage gas heat operation using the "INSTALLER

CHECKOUT" menu on the UI.

c.Record number of seconds for gas meter to complete one revolution.

 

d.

Divide

number

of

seconds

in step c. into

3600

(number

 

 

of seconds in 1 hour).

 

 

 

 

 

 

 

 

 

 

e. Multiply result of step d. by the number of cubic feet

 

 

shown

for

one

revolution

of test dial

to

obtain

cubic

feet

 

 

of gas flow per hour.

 

 

 

 

 

 

 

 

 

 

f. Multiply result of step f. by Btu heating value of the gas

 

 

to obtain total measured input shown in Table 4.

 

 

 

 

(Consult the local gas supplier if the heating value of

 

 

gas is not known).

 

 

 

 

 

 

 

 

 

 

EXAMPLE:

Assume

a 90,000

high

stage

input

unit

is

being

installed.

 

Assume

that

the

size

of

the

dial

is

2

cubic

ft., one

revolution

takes 129 sec., and the

heating

value

 

of

the

gas

is

1050

Btu/ft3.

Proceed

as follows:

 

 

 

 

 

 

 

 

 

 

23

Image 23
Contents Installation Inspect Shipment Unit Operation and Safety HazardElectricalshockhazard Identify Unit024-030 IN. MMIN.MM NumberLeft Side View Frontview Rightsideview Front View RETURN-AIR Filters Throwaway CompressorsFurnace Section Burner Orifice No. Qty.Drill SizePlace ClearancesSelect and Install Ductwork See Detail a Carbon Monoxide Poisoning Hazard Install Flue HoodInstall Gas Piping Provide for Condensate DisposalElectrical Shock Hazard Install Electrical ConnectionsFire or Explosion Hazard HIGH-VOLTAGE ConnectionsAccessory Installation Routing Power Leads Into UnitConnecting Ground Lead to Ground Screw Routing Control Power WiresGround Screw Factory Connected OAT Black WiresField Connection RequiredFIRE, EXPLOSION,ELECTRICALSHOCK Hazard Unit Start-Up and TroubleshootingMotor Turns Slowly Verify Motor Winding SectionDUSO0003 DU500095 Status Code 33 Limit Circuit Fault Status Code 22 Abnormal FLAME-PROVING SignalStatus Code 23 Pressure Switch did not Open Status Code 25 Invalid Model Selection or Setup ErrorUtility Interface with Infinity Control Indoor Airflow AdjustmentsUnit Operation Hazard AIR Conditioner Sequence of Operation Cooling OperationHigh Stage Low Stage Amber LED Operation Fault Flash Possible Cause Action CodeRated Heating Sequence of OPERATION-GAS Heat Dehumidification ModeGAS Heat Mode and Adjustments Infinity Controlled LOW Ambient CoolingExample Fire and Unit Damage HazardU.S.A CanadaCheck Burner Flame Check GAS Input Propane GASCheck for Refrigerant Leaks Start-Up AdjustmentsLOW Charge Cooling To USE Cooling Charging ChartsRefrigerant Charge No ChargeFactorywiresprovided Field Connection Required BlackwiresMain Burners Limit SwitchIndoor Fan and Motor Burner IgnitionOutdoor Fan Electrical Controls and WiringPressure Switches Refrigerant Circuit Outdoor Coil, Indoor Coil, and Condensate Drain PanRefrigerant System Temperature Thermistors Pressure Switch PROTECTION-REFRIGERANTControl Fault 230V Line Power Disconnect DetectionOCT Failed Thermistor Default OperationThermistor Sensor Comparison Page Remedy SymptomTable lO--Troubleshooting Chart Cont-Gas Remove and Store in Job File