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Carrier 50TFQ008-012 specifications Enthalpy Changeover Set Points, EconoMi$er IV Control, D C B A

Models: 50TFQ008-012

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D C B A

85	90	95	100	105	110
(29)	(32)	(35)	(38)	(41)	(43)

CONTROL

CURVE

A

B

C

D

1	8

1	6

1	4

1	2

CONTROL POINT

APPROX. °F (°C)

AT 50% RH

	73 (23)																								40
	70 (21)																						IR		40
	67 (19)																			Y	A		IR	3	8
	63 (17)																								8
																			DR

																	D				3	6
																N					3
															U
														PO				3	4
																			4

											P	E	R	32
												E		32
										TU
								—	B	TU		30
									B
						P	Y		28
					L		Y
				HA

						26
			NT			26																			65
		E	NT	4																					(18)
			2																						(18)


	2	2																					60
	2

2	0																					(16)
2																									A
																									A
																		55
																	(13)					B
														50

																			C
													(10)						C

45D

(7)

40

(4)

35

(2)

4	4

42

70

(21)

1	0	0		0
			9

46

80

(27)

75

(24)

80	70

6	0

50

D C B A

4	0

				I VE
		L	A	T
	E		A
R

3	0

						%	)
				Y	(	%
					(
			IT
			IT
	U	M	ID
H		M

20

0 1

HIGH LIMIT

CURVE

35	40	45	50	55	60	65	70	75	80	85	90	95	100	105	110
(2)	(4)	(7)	(10)	(13)	(16)	(18)	(21)	(24)	(27)	(29)	(32)	(35)	(38)	(41)	(43)

APPROXIMATE DRY BULB TEMPERATURE— °F (°C)

Fig. 35 — Enthalpy Changeover Set Points

N1		EXH	TR	TR1
N		Set
N	2V	10V
	2V	10V
P1	EXH		24	24 Vac
P1			Vac	COM
P			Vac	COM
P		Min	HOT	_
T1		Pos	+	_
		Pos	+

T	Open
T
		DCV	1	2
		Max	1	2
		Max
	2V	10V
AQ1	DCV			5
AQ1

AQ		DCV
SO+		Set	3	4
SO	2V	10V
SO
SR+	Free		EF	EF1
	Cool
SR	B	C
	A	D

Fig. 36 — EconoMi$er IV Control

CO2 SENSOR MAX RANGE SETTING

	6000
(ppm)	5000
(ppm)
CONFIGURATION	4000						800 ppm
							800 ppm
	3000						900 ppm
	3000						1000 ppm
							1000 ppm
	2000						1100 ppm
	2000

RANGE	1000
RANGE
	0
	2	3	4	5	6	7	8
	DAMPER VOLTAGE FOR MAX VENTILATION RATE

Fig. 37 — CO2 Sensor Maximum Range Setting

23

Image 23

Carrier 50TFQ008-012 Enthalpy Changeover Set Points, EconoMi$er IV Control, CO2 Sensor Maximum Range Setting, D C B A

Contents

INSTALLATION Installation, Start-Upand Service InstructionsCONTENTS SAFETY CONSIDERATIONSFig. 1 - Roof Curb Details Fig. 4 - Condensate Drain Piping Details Fig. 2 - Unit Leveling TolerancesFig. 3 - Condensate Drain Pan Side View Fig. 5 - Rigging Details Table 1 - Physical Data Fig. 6 - Base Unit Dimensions Step 5 - Make Electrical Connections Fig. 7 - Power Wiring ConnectionsTable 2 - Electric Heating Capacities VOLTAGE VOLTAGE VOLTAGE Step 6 - Adjust Factory-InstalledOptions Fig. 11 - Damper Panel with Manual Table 4 - Heat Anticipator SettingsOutdoor-AirDamper Installed Fig. 10 - Defrost BoardDamper with Hood Attached Fig. 14 - Outdoor Air Damper Position SettingFig. 12 - Outdoor-AirHood Details Fig. 13 - Optional Manual Outdoor-AirFig. 15A - PremierLink Controller Table 5 - PremierLink Sensor UsagePremierLink Fig. 15B - PremierLink Controller InstalledFig. 16 - Typical PremierLink Controls Wiring Sensor and Mounting Plate 33AMKITENT006 Fig. 18 - Differential Enthalpy ControlFig. 20 - EconoMi$er2 Component Locations Fig. 21 - Typical Access Panel LocationsFig. 23 - Indoor Coil Access Panel Relocation Fig. 19 - EconoMi$er IV Component LocationsFig. 24 - Outdoor-AirHood Construction Fig. 25 - Filter InstallationFig. 26 - EconoMi$er IV Wiring Fig. 30 - Return-AirPressure Drop Fig. 28 - Barometric Flow CapacityFig. 29 - Outdoor-AirDamper Leakage Fig. 31 - Supply Air Sensor Location Table 6 - Supply Air Sensor TemperatureResistance Values Table 7 - EconoMi$er IV Sensor Usageand LED Locations Fig. 33 - Outside Air TemperatureFig. 34 - Return Air Temperature or Enthalpy Fig. 32 - EconoMi$er IV Controller PotentiometerFig. 36 - EconoMi$er IV Control Fig. 37 - CO2 Sensor Maximum Range SettingAPPROXIMATE DRY BULB TEMPERATURE— F C Fig. 35 - Enthalpy Changeover Set Points60 x .10 + 75 x .90 = 73.5 F Table 8 - CO2 Sensor Standard Settings Fig. 38 - Typical Belt-DriveMotor Mounting for Fig. 40 - Indoor-FanPulley AdjustmentFig. 39 - Typical Belt-DriveMotor Mounting for SizeTable 10 - Fan Rpm at Motor Pulley Settings Refer to page 43 General Fan Performance Notes AIRFLOWRefer to page 43 General Fan Performance Notes AIRFLOWRefer to page 43 General Fan Performance Notes AIRFLOWRefer to page 43 General Fan Performance Notes AIRFLOWRefer to page 43 General Fan Performance Notes AIRFLOWRefer to page 43 General Fan Performance Notes AIRFLOWRefer to page 43 General Fan Performance Notes AIRFLOWRefer to page 43 General Fan Performance Notes AIRFLOWRefer to page 43 General Fan Performance Notes AIRFLOWRefer to page 43 General Fan Performance Notes AIRFLOWRefer to page 43 General Fan Performance Notes AIRFLOWRefer to page 43 General Fan Performance Notes AIRFLOWRefer to page 43 General Fan Performance Notes AIRFLOWRefer to page 43 General Fan Performance Notes AIRFLOWRefer to page 43 General Fan Performance Notes AIRFLOWRefer to General Fan Performance Notes below GENERAL NOTES FOR FAN PERFORMANCE DATA TABLESSTART-UP PRE-START-UPOperating Sequence Fig. 42 - Economizer Temperature Control Example Fig. 41 - DX Cooling Temperature Control ExampleFig. 45 - Separating Coil Sections SERVICEFig. 43 - Cleaning Outdoor Coil Fig. 44 - Propping Up Top PanelLubrication Fig. 49 - Cooling Charging Chart, 50TFQ012 TROUBLESHOOTINGFig. 48 - Cooling Charging Chart, 50TFQ009 SUPPLY-AIRINPUT - To check supply-airinput Circuit Breaker Table 28 - Heating and Cooling Troubleshooting Fig. 51 - EconoMi$er IV Functional View Table 29 - EconoMi$er IV Input/Output LogicINDEX Page III.START-UP START-UPCHECKLIST Remove and Store in Job FileTEMPERATURES I. PRELIMINARY INFORMATION