Carrier 48TFD008-014, 48TFE008-014, 48TFF008-012 User Manual

48TFD008-014 48TFE008-014 48TFF008,012

Single-Package Rooftop Heating/Cooling Units 50 Hz

Installation, Start-Up and

Service Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33

Step 1 — Provide Unit Support . . . . . . . . . . . . . . . . . . . 1

•ROOF CURB

•SLAB MOUNT

Step 2 — Field Fabricate Ductwork . . . . . . . . . . . . . . . 2

Step 3 — Install External Trap for

Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Step 4 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . 2

• POSITIONING
Step 5	— Install Flue Hood . . . . . . . . . . . . . . . . . . . . . . .	8
Step 6	— Install Gas Piping . . . . . . . . . . . . . . . . . . . . . .	8
Step 7	— Make Electrical Connection . . . . . . . . . . . .	8

•FIELD POWER SUPPLY

•FIELD CONTROL WIRING

•HEAT ANTICIPATOR SETTINGS

Step 8 — Adjust Factory-Installed Options . . . . . . 11

•APOLLO CONTROL

•MANUAL OUTDOOR-AIR DAMPER

•OPTIONAL DURABLADE ECONOMIZER

•OPTIONAL ECONOMI$ER

Step 9 — Adjust Evaporator-Fan Speed . . . . . . . . . 20

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34-36 SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-41 TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . 42-46 START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . CL-1

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should install, repair, or service air-conditioning equipment.

Untrained personnel can perform basic maintenance functions of cleaning coils and filters and replacing filters. All other operations should be performed by trained service personnel. When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached to the unit, and other safety precautions that may apply.

Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for unbrazing operations. Have fire extinguishers available for all brazing operations.

Disconnect gas piping from unit when leak testing at pressure greater than 3.4 kPa (1/2 psig). Pressures greater than 3.4 kPa (1/2 psig) will cause gas valve damage resulting in hazardous condition. If gas valve is ever subjected to pressure greater than 3.4 kPa (1/2 psig), it must be replaced before use. When pressure testing field-supplied gas piping at pressures of 3.4 kPa (1/2 psig) or less, a unit connected to such piping must be isolated by manually closing the gas valve(s).

Before performing service or maintenance operations on unit, turn off main power switch to unit. Electrical shock could cause personal injury.

INSTALLATION

Unit is shipped in the vertical discharge configuration. To convert to horizontal configuration, remove screws from side duct opening covers and remove covers. Using the same screws, install covers on vertical duct openings with the insulation side down. Seals around duct openings must be tight. See Fig. 1.

Step 1 — Provide Unit Support

ROOF CURB — Assemble and install accessory roof curb in accordance with instructions shipped with curb. See Fig. 2. Install insulation, cant strips, roofing felt, and counter flashing as shown. Ductwork must be attached to curb. If gas, electric power or control power is to be routed through the curb, attach the accessory thru-the-curb service connection plates to the roof curb in accordance with the accessory installation instructions. Connection plates must be installed before unit is set in roof curb.

IMPORTANT: The gasketing of the unit to the roof curb is critical for a watertight seal. Install gasket supplied with the roof curb as shown in Fig. 2. Improperly applied gasket can also result in air leaks and poor unit performance.

Curb should be level. Unit leveling tolerances are shown in Fig. 3. This is necessary for unit drain to function properly. Refer to Accessory Roof Curb Installation Instructions for additional information as required.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book	1	4	Catalog No. 004-816	Printed in U.S.A.	Form 48TF-C1SI	Pg 1	1-01	Replaces: New
Tab	1a	6a

SLAB MOUNT (Horizontal Units Only) — Provide a level concrete slab that extends a minimum of 152 mm (6 in.) beyond unit cabinet. Install a gravel apron in front of condenser coil air inlet to prevent grass and foliage from obstructing airflow.

NOTE: Horizontal units may be installed on a roof curb if required.

Step 2 — Field Fabricate Ductwork — Secure all ducts to roof curb and building structure on vertical units. Do not connect ductwork to unit. For horizontal applications, fieldsupplied flanges should be attached to horizontal discharge openings and all ductwork secured to the flanges. Insulate and weatherproof all external ductwork, joints, and roof openings with counter flashing and mastic in accordance with applicable codes.

Ducts passing through an unconditioned space must be insulated and covered with a vapor barrier.

If a plenum return is used on a vertical unit, the return should be ducted through the roof deck to comply with applicable fire codes.

A minimum clearance is not required around ductwork. Cabinet return-air static shall not exceed –87 Pa (–.35 in. wg) with Durablade economizer, –26 Pa (–.30 in. wg) with EconoMi$er or –112 Pa (–.45 in. wg) without economizer.

These units are designed for a minimum heating operation continuous return-air temperature of 10 C (50 F) (dry bulb), or an intermittent operation down to 7 C (45 F) (dry bulb), such as when used with a night set-back thermostat.

Step 3 — Install External Trap for Condensate Drain — The unit’s 19-mm (3/4-in.) condensate drain connections are located at the bottom and side of the unit. Unit discharge connections do not determine the use of drain connections; either drain connection can be used with vertical or horizontal applications.

When using the standard side drain connection, make sure the plug (Red) in the alternate bottom connection is tight before installing the unit.

To use the bottom drain connection for a roof curb installation, relocate the factory-installed plug (Red) from the bottom connection to the side connection. See Fig. 4. The piping for the condensate drain and external trap can be completed after the unit is in place.

All units must have an external trap for condensate drainage. Install a trap at least 102-mm (4-in.) deep and protect against freeze-up. If drain line is installed downstream from the external trap, pitch the line away from the unit at 25 mm (1 in.) per 3 m (10 ft) of run. Do not use a pipe size smaller than the 19-mm (3/4-in.) unit connection.

Step 4 — Rig and Place Unit — Inspect unit for transportation damage. File any claim with transportation agency. Keep unit upright and do not drop. Spreader bars are not required if top crating is left on unit. Rollers may be used to move unit across a roof. Level by using unit frame as a reference. See Tables 1A and 1B and Fig. 5 for additional information. Operating weight is shown in Tables 1A and 1B and Fig. 5.

Lifting holes are provided in base rails as shown in Fig. 5 and 6. Refer to rigging instructions on unit.

All panels must be in place when rigging.

POSITIONING — Maintain clearance around and above unit to provide minimum distance from combustible materials, proper airflow, and service access. See Fig. 6.

Do not install unit in an indoor location. Do not locate unit air inlets near exhaust vents or other sources of contaminated air.

Be sure that unit is installed so that snow will not block the combustion intake or flue outlet.

Unit may be installed directly on wood flooring or on Class A, B, or C roof-covering material when roof curb is used.

(Copy continued on page 4.)

Fig. 1 — Horizontal Conversion Panels

2

CONNECTOR

D ALT

B

C

DRAIN

GAS

POWER

CONTROL

PKG. ACCY.

HOLE

CRBTMPWR001A00

3/4″

3/4″ [19] NPT

1/2″

CRBTMPWR002A00

2′-87/16″

1′-1015/16″

13/4″

[19] NPT

11/4″ [31.7]

[12.7]

CRBTMPWR003A00

1/2″

3/4″ [19] NPT

1/2″

[827]

[583]

[44.5]

[12.7] NPT

CRBTMPWR004A00

3

11/4″ [31.7]

[12.7]

/4″

[19] NPT

	ROOF CURB	“A”	UNIT SIZE
	ACCESSORY		48TF
	CRRFCURB003A00	1′-2″ [356]	008-014
	CRRFCURB004A00	2′-0″ [610]

NOTES:

1.Roof curb accessory is shipped disassembled.

2.Insulated panels: 1-in. [25] thick polyurethane

foam, 13/4 lb density.

3. Dimensions in [ ] are in millimeters.

4.Roof curb: 16-gage steel.

5.Attach ductwork to curb (flanges of duct rest on curb).

6.Service clearance 4 ft [1219] on each side.

7. Direction of airflow.

8.Connector packages CRBTMPWR001A00 and 2A00 are for thru-the-curb gas type. Packages CRBTMPWR003A00 and 4A00 are for thru- the-bottom type gas connections.

Fig. 2 — Roof Curb Details

3

Although unit is weatherproof, guard against water from higher level runoff and overhangs.

Position unit on roof curb so that the following clearances are maintained: 7 mm (1/4-in.) clearance between roof curb and base rails on each side and duct end of unit; 84 mm (35/16-in.) clearance between roof curb and condenser coil end of unit. (See Fig. 2, section C-C.)

Locate mechanical draft system flue assembly at least 1219 mm (48 in.) from any opening through which combustion products could enter the building, and at least 1219 mm (48 in.) from an adjacent building or combustible material. When unit is located adjacent to public walkways, flue assembly must be at least 2.13 m (7 ft) above grade.

Flue vent discharge must have a minimum horizontal clearance of 1219 mm (48 in.) from electric and gas meters, gas regulators, and gas relief equipment.

Flue gas can deteriorate building materials. Orient unit so that flue gas will not affect building materials.

Adequate combustion-air space must be provided for proper operation of this equipment. Be sure that installation complies with all local codes and Section 5.3, Air for Combustion and Ventilation, NFGC (National Fuel Gas Code), ANSI (American National Standards Institute), latest revision, U.S.A. Standards.

(Copy continued on page 8.)

MAXIMUM ALLOWABLE

DIFFERENCE mm (in.)

A-B	B-C	A-C
13 (0.5)	25 (1.0)	25 (1.0)

Fig. 3 — Unit Leveling Tolerances

NOTES:

1. Dimension in ( ) is in millimeters.

2.Hook rigging shackles through holes in base rail as shown in detail ‘‘A.’’ Holes in base rails are centered around the unit center of gravity. Use wooden top skid when rigging to prevent rigging straps from damaging unit.

3.Weights include base unit without economizer. See Tables 1A and 1B for economizer weights.

All panels must be in place when rigging.

DRAIN PLUG

NOTE: Drain plug is shown in factory-installed position.

Fig. 4 — Condensate Drain Pan

UNIT	MAX			DIMENSIONS
	WEIGHT		‘‘A’’		‘‘B’’			‘‘C’’
48TF
	lb	kg	in.	mm	in.	mm		in.	mm
D/E/F008	870	395	87.38	2219	40.25	1022		41.31	1050
D/E/F012	1035	469	87.38	2219	40.25	1022		49.31	1253
D/E014	1050	476	87.38	2219	40.25	1022		49.31	1253

Fig. 5 — Rigging Details

4

Table 1A — Physical Data (SI)

UNIT SIZE 48TF			008							012						014
Low Heat (D), Medium Heat (E), High Heat (F)		D			E			F	D			E			F	D			E
NOMINAL CAPACITY (kW)			21.5							29.2						35.9
OPERATING WEIGHT (kg)
Unit			395							469						476
Durablade Economizer			20							20						20
EconoMi$er			28							28						28
Roof Curb*			65							65						65
COMPRESSOR TYPE					Hermetic							Hermetic				Scroll
Quantity			2							2						2
Oil (ml)					1479 ea							1479 ea				1597 ea
REFRIGERANT TYPE										R-22
Operating Charge (kg)
Circuit 1			2.10							3.08						3.49
Circuit 2			2.22							3.22						3.49
CONDENSER COIL							Enhanced Copper Tubes, Aluminum Lanced Fins
Rows...Fins/m			1...669							2...669						2...669
Total Face Area (sq m)			1.90							1.92						2.30
CONDENSER FAN									Propeller Type
Nominal L/s			2880							3050						3050
Quantity...Diameter (mm)			2...559							2...559						2...559
Motor BkW...r/s			.19...15.5							.19...15.5						.19...15.5
EVAPORATOR COIL					Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Acutrol™ Feed Device
Rows...Fins/m			3...590							3...590						4...590
Total Face Area (sq m)			0.74							0.93						1.03
EVAPORATOR FAN									Centrifugal Type
Quantity...Size (mm x mm)				1...381 x 381							1...381 x 381					1...381 x 381
Type Drive					Belt							Belt				Belt
Nominal L/s			1230							1700						1980
Motor kW			1.12							1.50						2.24
Maximum Continuous BkW			1.79							1.79						2.76
Motor Frame Size			56							56						56
Fan r/s Range			8.2-11.7							9.5-13.0						12.0-15.0
Motor Bearing Type					Ball							Ball				Ball
Maximum Allowable r/s			26.7							26.7						26.7
Motor Pulley Pitch Diameter Min/Max (mm)			61/86							71/97						102/127
Nominal Motor Shaft Diameter (mm)			16							16						22
Fan Pulley Pitch Diameter (mm)			178							178						203
Nominal Fan Shaft Diameter (mm)			25							25						25
Belt, Quantity...Type...Length (mm)					1...A...1245							1...A...1245				1...A...1346
Pulley Center Line Distance (mm)			425-489							403-445						403-445
Speed Change per Full Turn of			.70							.70						.60
Movable Pulley Flange (r/s)
Movable Pulley Maximum Full Turns			5							5						5
From Closed Position
Factory Setting			5							5						5
Factory Speed Setting (r/s)			8.2							9.5						12.0
Fan Shaft Diameter at Pulley (mm)			25							25						25
FURNACE SECTION
Rollout Switch Cutout Temp (C)			90.6							90.6						90.6
Burner Orifice Diameter (mm)
Natural Gas	— Std		3.05						3.05			3.05			3.28	3.05			3.28
Liquid Propane — Alt			2.44						2.44			2.44			2.59	2.44			2.59
Thermostat Heat Anticipator Setting (amps)
400 v Stage 1		.14			.14			.14		.14						.14
Stage 2		.14			.20			.20		.20						.20
Gas Input (kW)	Stage 1	21.1			31.9			39.8	31.9			39.8			43.9	39.8			43.9
	Stage 2	31.4			50.4			59.8	50.4			59.8			65.6	59.8			65.6
Efficiency (Steady State) (%)					80							80				80
Temperature Rise Range (C)		–6-10			2-18			7-24	2-18			7-24			4-21	7-24			4-21
Manifold Pressure (kPa)
Natural Gas	— Std		8.3							8.3						8.3
Liquid Propane	— Alt		8.3							8.3						8.3
Field Gas Connection Size (mm)		13			19			19	19			19			19	19			19
HIGH-PRESSURE SWITCH (kPa)
Standard Compressor								3103 ± 345								3448 ± 345
Internal Relief (Differential)
Cutout										2951
Reset (Auto.)										2206
LOW-PRESSURE SWITCH (kPa)
Cutout										48 ± 21
Reset (Auto.)									152 ± 48
FREEZE PROTECTION THERMOSTAT
Opens (C)										–1 ± 3
Closes (C)										7 ± 3
OUTDOOR-AIR INLET SCREENS									Cleanable
Quantity...Size (mm)									1...508 x 635 x 25
									1...406 x 635 x 25
RETURN-AIR FILTERS									Throwaway
Quantity...Size (mm)			4...406 x 508 x 51							4...508 x 508 x 51						4...508 x 508 x 51

LEGEND

Bhp — Brake Horsepower

BkW — Fan Input Watts x Motor Efficiency

*Weight of 356 mm (14-in.) roof curb.

NOTE: The 48TF units have a loss-of-charge (low pressure) switch located in the liquid line.

5

Table 1B — Physical Data (English)

UNIT SIZE 48TF			008							012						014
Low Heat (D), Medium Heat (E), High Heat (F)		D			E			F	D			E			F	D			E
NOMINAL CAPACITY (tons)			6.1							8.3						10.2
OPERATING WEIGHT (lb)
Unit			870							1035						1050
Durablade Economizer			44							44						44
EconoMi$er			62							62						62
Roof Curb*			143							143						143
COMPRESSOR TYPE					Hermetic							Hermetic				Scroll
Quantity			2							2						2
Oil (oz)					50 ea							50 ea				54 ea
REFRIGERANT TYPE									R-22
Operating Charge (lb-oz)
Circuit 1			4-10							6-13						7-11
Circuit 2			4-11							7- 2						7-			8
CONDENSER COIL								Enhanced Copper Tubes, Aluminum Lanced Fins
Rows...Fins/in.			1...17							2...17						2...17
Total Face Area (sq ft)			20.50							20.50						25.00
CONDENSER FAN									Propeller Type
Nominal Cfm			6100							6500						6500
Quantity...Diameter (in.)			2...22							2...22						2...22
Motor BkW...Rpm			1/4...930							1/4...930						1/4...930
EVAPORATOR COIL			Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Acutrol™ Feed Device
Rows...Fins/in.			3...15							3...15						4...15
Total Face Area (sq ft)			8.0							10.0						11.1
EVAPORATOR FAN									Centrifugal Type
Quantity...Size (in.)					1...15 x 15							1...15 x 15				1...15 x 15
Type Drive					Belt							Belt				Belt
Nominal Cfm			2600							3500						4200
Motor Hp			11/2							2						3
Maximum Continuous Bhp			2.40							2.40						3.70
Motor Frame Size			56							56						56
Fan Rpm Range			492-700							571-779						717-900
Motor Bearing Type					Ball							Ball				Ball
Maximum Allowable Rpm			1600							1600						1600
Motor Pulley Pitch Diameter Min/Max (in.)			2.4/3.4							2.8/3.8						4.0/5.0
Nominal Motor Shaft Diameter (in.)			5/8							5/8						7/8
Fan Pulley Pitch Diameter (in.)			7.0							7.0						8.0
Nominal Fan Shaft Diameter (in.)					—							—				—
Belt, Quantity...Type...Length (in.)					1...A...49							1...A...49				1...A...53
Pulley Center Line Distance (in.)			16.75-19.25							15.85-17.50						15.85-17.50
Speed Change per Full Turn of			41							41						36
Movable Pulley Flange (rpm)
Movable Pulley Maximum Full Turns			5							5						5
From Closed Position
Factory Setting			5							5						5
Factory Speed Setting (rpm)			492							571						717
Fan Shaft Diameter at Pulley (in.)			1							1						1
FURNACE SECTION
Rollout Switch Cutout Temp (F)			195							195						195
Burner Orifice Diameter (in. ...drill size)
Natural Gas	— Std		.120...31						.120...31			.120...31		.129...30		.120...31		.129...30
Liquid Propane — Alt			.096...41						.096...41			.096...41			.102...38	.096...41			.102...38
Thermostat Heat Anticipator Setting (amps)
400 v Stage 1		.14			.14			.14		.14						.14
Stage 2		.14			.20			.20		.20						.20
Gas Input (Btuh)	Stage 1	72,000			109,000			136,000	109,000			136,000			150,000	136,000			150,000
‘		107,000			172,000			204,000	172,000			204,000			224,000	204,000			224,000
Efficiency (Steady State) (%)					80							80				80
Temperature Rise Range (F)		20-50			35-65			45-75	35-65			45-75			40-70	45-75			40-70
Manifold Pressure (in. wg)
Natural Gas	— Std		3.5							3.5						3.5
Liquid Propane	— Alt		3.5							3.5						3.5
Field Gas Connection Size (in.)		1/2			3/4			3/4		3/4						3/4
HIGH-PRESSURE SWITCH (psig)
Standard Compressor								450 ± 50								500 ± 50
Internal Relief (Differential)
Cutout										428
Reset (Auto.)										320
LOW-PRESSURE SWITCH (psig)
Cutout										7 ± 3
Reset (Auto.)									22 ± 7
FREEZE PROTECTION THERMOSTAT
Opens (F)									30 ± 5
Closes (F)									45 ± 5
OUTDOOR-AIR INLET SCREENS									Cleanable
Quantity...Size (in.)									1...20 x 25 x 1
									1...16 x 25 x 1
RETURN-AIR FILTERS									Throwaway
Quantity...Size (in.)			4...16 x 20 x 2							4...20 x 20 x 2						4...20 x 20 x 2

LEGEND

Bhp — Brake Horsepower

BkW — Fan Input Watts x Motor Efficiency

*Weight of 356 mm (14-in.) roof curb.

NOTE: The 48TF units have a loss-of-charge (low pressure) switch located in the liquid line.

6

STANDARD

DURABLADE

ECONOMI$ER

CORNER

CORNER

CORNER

CORNER

UNIT

ECONOMIZER

“H”

“J”

“K”

“L”

UNIT WEIGHT

WEIGHT

WEIGHT (A)

WEIGHT (B)

WEIGHT (C)

WEIGHT (D)

48TF

WEIGHT

Lb

Kg

Lb

Kg

Lb

Kg

Lb

Kg

Lb

Kg

Lb

Kg

Lb

Kg

ft-in.

[mm]

ft-in.

[mm]

ft-in.

[mm]

ft-in.

[mm]

D/E/F008

870

395

44

20

62

28

189

86

161

73

239

109

280

127

1-27/8

[

378]

3-55/16

[1050]

2-911/16

[856]

2- 27/16

[672]

D/E/F012

1035

469

44

20

62

28

225

102

192

87

285

129

333

151

2-57/8

[

759]

4-15/16

[1253]

3-03/8

[924]

2-107/16

[875]

D/E014

1050

476

44

20

62

28

228

103

195

88

289

131

338

153

1-27/8

[

378]

4-15/16

[1253]

3-03/8

[924]

2-107/16

[875]

NOTES:

1. Dimensions in [ ] are in millimeters.

2. Center of gravity.

3. Direction of airflow.

4.On vertical discharge units, ductwork to be attached to accessory roof curb only. For horizontal discharge units, field-supplied flanges should be attached to horizontal discharge openings, and all ductwork should be attached to the flanges.

5.Minimum clearance (local codes or jurisdiction may prevail):

a. Between unit, flue side and combustible surfaces, 36 in. [914].

b.Bottom of unit to combustible surfaces (when not using curb), 1 in. [25]. Bottom of base rail to combustible surfaces (when not using curb) 0 inches.

c.Condenser coil, for proper airflow, 36 in. [914] one side, 12 in. [304] the other. The side getting the greater clearance is optional.

d.Overhead, 60 in. [1624] to assure proper condenser fan operation.

e.Between units, control box side, 42 in. [1067] per NEC (National Electrical Code).

f.Between unit and ungrounded surfaces, control box side, 36 in. [914] per NEC.

g.Between unit and block or concrete walls and other grounded surfaces, control box side, 42 in. [1067] per NEC.

h.Horizontal supply and return end, 0 inches.

6.With the exception of the clearance for the condenser coil and combustion side as stated in notes 5a, b and c, a removable fence or barricade requires no clearance.

7.Units may be installed on combustible floors made from wood or Class A, B, or C roof covering material if set on base rail.

8.The vertical center of gravity is 1′-7″ [483] for 008, 1′-11″ [584] for 012 and 014 up from the bottom of the base rail.

CONNECTION SIZES

A13/8″ Dia [35] Field Power Supply Hole

B21/2″ Dia [64] Power Supply Knockout

C13/4″ Dia [44] Charging Port Hole

D7/8″ Dia [22] Field Control Wiring Hole

E3/4″ [19] - 14 NPT Condensate Drain

1/2″ [13] - 14 NPT Gas Connection 48TFD008

F3/4″ [19] - 14 NPT Gas Connection 48TFE,F008 48TFD,E012 & 014, 48TJF012

G2″ Dia [51] Power Supply Knockout

BOTTOM POWER CHART, THESE HOLES REQUIRED FOR USE WITH ACCESSORY PACKAGES — CRBTMPWR002A00 (POWER AND CONTROL) AND CRBTMPWR004A00 (POWER, CONTROL, AND GAS)

THREADED

WIRE

REQURED

CONDUIT

HOLE SIZES

USE

SIZE

(MAX.)

1/2″ [12.7]

24 V

7/8″ [22.2]

11/4″ [31.7]

Power

13/4″ [44.4]

3/4″ [19] FPT

Gas

15/8″ [41.3]

Fig. 6 — Base Unit Dimensions

7

GAS REGULATOR*

Step 5 — Install Flue Hood — Flue hood is shipped screwed to the burner compartment access panel. Remove from shipping location and, using screws provided, install flue hood and screen in location shown in Fig. 7.

Step 6 — Install Gas Piping — Unit is equipped for use with type of gas shown on nameplate. Refer to local building codes.

For natural gas applications, gas pressure at unit gas connection must not be less than 13.5 kPa (4.0 in. wg) (17.0 kPa [5.0 in. wg] in high heat units) or greater than 44.0 kPa (13.0 in. wg) while unit is operating. For liquid propane applications, the gas pressure must not be less than 17.0 kPa (5.0 in. wg) or greater than 44.0 kPa (13.0 in. wg) at the unit connection.

Size gas supply piping for 1.7 kPa (0.5 in. wg) maximum pressure drop. Do not use supply pipe smaller than unit gas connection.

NOTE: When installing gas piping to gas valve inlet, use properly sized back-up wrench on inlet flange flats.

Support gas piping as shown in the table in Fig. 8. For example, a 19 mm (3/4-in.) gas pipe must have one fieldfabricated support beam every 2.4 m (8 ft).

See Fig. 8 for typical pipe guide and locations of external manual gas shutoff valve.

Step 7 — Make Electrical Connections

Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur. This ground may consist of electrical wire connected to unit ground lug in control compartment, or conduit approved for electrical ground when installed in accordance with NEC (National Electrical Code), ANSI/NFPA (National Fire Protection Association), latest edition (U.S.A. Standards), and local electrical codes. Do not use gas piping as an electrical ground. Failure to follow this warning could result in the installer being liable for personal injury of others.

FIELD POWER SUPPLY — All units are factory wired for the voltage shown on the nameplate.

Refer to unit label diagram for additional information. Pigtails are provided for field service.

When installing units, provide a disconnect per local codes. Use copper conductors only when splice connectors are used.

All field wiring must comply with local requirements.

Install conduit through side panel openings indicated in Fig. 6. Route power lines through connector to terminal connections as shown in Fig. 9.

Voltages between phases must be balanced within 2% and the current within 10%. Use the formula shown in Table 2, Note 2 to determine the percentage of voltage imbalance. Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. Such operation would invalidate any applicable Carrier warranty.

NOTE: If field-installed thru-the-bottom connections are used, refer to the accessory installation instructions for power wiring. Refer to Fig. 6 for drilling holes in basepan.

Fig. 7 — Flue Hood Details

BASE UNIT

BASE RAIL

X

228 mm (9") MINIMUM CLEARANCE FOR PANELREMOVAL

MANUAL GAS SHUTOFF VALVE*

1219 mm (48") MINIMUM

DRIP LEG PER NFGC*

ROOF CURB	FIELD-FABRICATED
	SUPPORT*

FROM GAS METER

LEGEND

NFGC — National Fuel Gas Code (U.S.A. Standard) *Field supplied.

NOTE: Follow all local codes.

SPACING OF SUPPORTS

STEEL PIPE NOMINAL DIAMETER	X DIMENSION
mm (in.)	m (ft)
13 (1/2)	1.8	(6)
19 or 25 (3/4 or 1)	2.4	(8)
32 or larger (11/4 or larger)	3.0 (10)

Fig. 8 — Gas Piping Guide (With Accessory Thru-the-Curb Service Connections)

FIELD CONTROL WIRING — Install a Carrier-approved accessory thermostat assembly according to installation instructions included with the accessory. Locate thermostat assembly on a solid wall in the conditioned space to sense average temperature in accordance with thermostat installation instructions.

NOTE: For wire runs up to 15 m (50 ft), use no. 18 AWG (American Wire Gage) insulated wire (35 C minimum). For 15 to 23 m (51 to 75 ft), use no. 16 AWG insulated wire (35 C minimum). For over 23 m (75 ft), use no. 14 AWG insulated wire (35 C minimum). All wire larger than no. 18 AWG cannot be directly connected to the thermostat and will require a junction box and splice at the thermostat. Refer to Table 3 for wire conversions.

8

Table 2 — Electrical Data

UNIT	NOMINAL	VOLTAGE		COMPR			OFM	IFM	POWER SUPPLY		MINIMUM UNIT
	VOLTAGE	RANGE			(ea)		(ea)				DISCONNECT
48TF
	(50 Hz)	Min	Max	RLA		LRA	FLA	FLA	MCA	MOCP*	FLA	LRA
008	400	360	440	6.4		42.0	0.3	2.6	17.6	20	18	108
	(3 phase)
012	400	360	440	8.9		52.0	0.3	2.6	23.2	30	24	128
	(3 phase)
014	400	360	440	10.4		73.0	0.7	5.4	29.4	35	31	192
	(3 phase)

LEGEND

FLA — Full Load Amps

HACR — Heating, Air Conditioning and Refrigeration

IFM — Indoor (Evaporator) Fan Motor

LRA — Locked Rotor Amps

MCA — Minimum Circuit Amps

MOCP — Maximum Overcurrent Protection

NEC — National Electrical Code (U.S.A.)

OFM — Outdoor (Condenser) Fan Motor

RLA — Rated Load Amps

*Fuse or HACR circuit breaker.

NOTES:

1.In compliance with NEC requirements (U.S.A. Standard) for multimotor and combination load equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be fuse or HACR breaker.

2.Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply voltage is greater than 2%. Use the following formula to determine the percent of voltage imbalance.

% Voltage Imbalance

	= 100 x	max voltage deviation from average voltage
		average voltage

Example: Supply voltage is 400-3-50.

AB = 393 v BC = 403 v AC = 396 v

Average Voltage = 393 + 403 + 396 3

=

1192

3

= 397

Determine maximum deviation from average voltage. (AB) 397 – 393 = 4 v

(BC) 403 – 397 = 6 v (AC) 397 – 396 = 1 v

Maximum deviation is 6 v.

Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

6

397

= 1.5%

This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric utility company immediately.

Route thermostat cable or equivalent single leads of colored wire from thermostat subbase terminals to low-voltage connections on unit (shown in Fig. 10) as described in Steps 1-4 below.

1.If unit is mounted on roof curb and accessory thru-the- curb service plate connection is used, route wire through connection plate.

2.Pass control wires through the hole provided on unit (see connection D in Connection Sizes table in Fig. 6).

3.Feed wires through the raceway built into the corner post to the 24-v barrier located on the left side of the control box. See Fig. 11. The raceway provides the UL-required (Underwriters’ Laboratories) clearance between highand low-voltage wiring.

4.Connect thermostat wires to screw terminals on lowvoltage connection board.

HEAT ANTICIPATOR SETTINGS — Set heat anticipator settings at .14 amp for the first stage and .20 amp for secondstage heating, except for 008 low heat. Set both first and second stage heat anticipator settings for 008 at .14 amp.

Table 3 — American/European Wire Conversions

		AMERICAN		EUROPEAN
	Industry		American	Industry
			Conversion	Standard
	Standard Size
			Size (mm2)	Size (mm2)
	18 AWG		0.82	1.0
	16 AWG		1.30	1.5
	14 AWG		2.08	2.5
	12 AWG		3.30	4.0
	10 AWG		5.25	6.0
	8 AWG		6.36	10.0
	6 AWG		13.29	16.0
	4 AWG		21.14	25.0
	3 AWG		26.65	—
	2 AWG		33.61	35.0
	1 AWG		42.39	50.0
	1/0 AWG		53.49	—
	2/0 AWG		67.42	70.0
	3/0 AWG		85.00	95.0
	4/0 AWG		107.19	120.0
	250 kcmil		126.64	150.0
	300 kcmil		151.97	—
	350 kcmil		177.90	185.0
	400 kcmil		202.63	240.0
	500 kcmil		253.29	300.0
	600 kcmil		303.95	—

LEGEND

AWG — American Wire Gage kcmil — Thousand Circular Mils

9

	LEGEND
C	— Contactor
IFC	— Indoor (Evaporator)
	Fan Contactor
NEC	— National Electrical Code
	(U.S.A. Standard)
	Splice Connection
	(Factory Supplied)
	Equipment Ground
	Field Wiring
	Factory Wiring

Fig. 9 — Power Wiring Connections

	UNIT LOW VOLTAGE	INTEGRATED
		GAS UNIT
	CONNECTION
		CONTROLLER
	BOARD
		(IGC)

LEGEND

AHA — Adjustable Heat Anticipator

CC — Cooling Compensator

Field Wiring

Factory Wiring

Fig. 10 — Low-Voltage Connections	COMPRESSOR	COMPRESSOR
RACEWAY
	NO. 2	NO.1

Fig. 11 — Field Control Wiring Raceway

and Compressor Location

10

Step 8 — Adjust Factory-Installed Options

APOLLO CONTROL — The optional Apollo control is used to actively monitor all modes of operation as well as indoor (evaporator) fan status, filter status, and indoor-air quality. The Apollo control is designed to work with Carrier TEMP and VVT® systems.

The thermostat must be wired to the Apollo control before starting the unit. Refer to the Apollo control installation instructions for information on installing the thermostat. See Fig. 12 for Apollo location.

MANUAL OUTDOOR-AIR DAMPER — The outdoor-air hood and screen are attached to the basepan at the bottom of the unit for shipping.

Assembly:

1.Determine quantity of ventilation required for building. Record amount for use in Step 8.

2.Remove and save evaporator coil access panel and screws. See Fig. 13.

3.Separate hood and screen from basepan by removing the screws and brackets securing them. Save all screws and discard brackets.

4.Replace evaporator coil access panel using screws from Step 2.

5.Place hood on front of evaporator coil access panel. See Fig. 14 for hood details. Secure top of hood with the screws removed in Step 3. See Fig. 15.

6.Remove and save 6 screws (3 on each side) from sides of the manual outdoor-air damper. Remove and save 2 manual outdoor-air adjustment screws (one on each side of damper blade).

7.Align screw holes on hood with screw holes on side of manual outdoor-air damper. See Fig. 14 and 15. Secure hood with 6 side screws from Step 6.

8.Adjust minimum position setting of the damper blade by adjusting the 2 manual outdoor-air adjustment screws on the front of the damper blade. See Fig. 13. Slide blade vertically until it is in the appropriate position determined by Fig. 16. Tighten screws.

WIRING TO			APOLLO	CONTROL
THERMOSTAT			CONTROL	WIRING

Fig. 12 — Apollo Control Factory-Installed

in Typical Unit

9.Remove and save screws currently on sides of hood. Insert screens. Secure screens to hood using the screws. See Fig. 15.

Fig. 13 — Damper Panel with Manual

Outdoor-Air Damper Installed

Fig. 14 — Outdoor-Air Hood Details

Fig. 15 — Damper with Hood Attached

11

	250		1.0
	200	(in. wg)	0.8
(Pa)
PRESSURE	150	PRESSURE	0.6
								OPEN			mm)			mm)
										(51			(76
							mm)		2"			3"
NEGATIVE	100	NEGATIVE	0.4
						(25									mm)
					1"									(112
												.4"
												4
	50		0.2
	0		0	2		4		6			8			10		12
					OUTDOOR AIRFLOW (cfm x 100)
			0	100		200			300			400				500
					OUTDOOR AIRFLOW (L/s)

Fig. 16 — Position Setting

OPTIONAL DURABLADE ECONOMIZER — The optional economizer hood assembly is packaged and shipped in the filter section. Damper blades and control boards are installed at the factory and the economizer is shipped in the vertical discharge position.

NOTE: Horizontal discharge block-off plate is shipped with the air hood package. If unit is to be used for vertical discharge application, discard this plate.

Assembly

1.Determine if ventilation air is required in building. If so, determine the minimum amount to be supplied by each unit and record quantity of ventilation air needed for use in Step 8.

2.Remove filter access panel by raising panel and swinging panel outward. Panel is now disengaged from track and can be removed. No tools are required to remove filter access panel. Remove outdoor-air opening panel. Save panels and screws. See Fig. 17. Remove optional economizer and outdoor-air damper hood package from filter section.

3.Assemble outdoor-air hood top and side plates as shown in Fig. 18. Install seal strips on hood top and sides. Put aside screen retainer and retainer screw for later assembly. Do not attach hood to unit at this time.

4.On 012 and 014 units, install vertical discharge block-off plate on right side over return air duct opening. See Fig. 19.

5.a. Slide economizer into unit and secure with screws. See Fig. 20.

NOTE: Be sure to engage rear economizer flange under tabs at rear of vertical return-air opening.

b.Remove screw and discard from barometric relief damper. See Fig. 20.

6.To convert to horizontal discharge application:

a.Rotate the economizer 90 degrees until the economizer motor faces the condenser section (see Fig. 21).

b. Rotate the barometric relief damper hinge 90 degrees. Barometric relief damper should open vertically to operate properly.

c.Install horizontal discharge block-off plate over the opening on the access panel. (Block-off plate MUST be installed before installing hood assembly.) See Fig. 22.

7.Insert economizer plug into economizer harness. Remove tape from barometric relief damper. See Fig. 20.

8.If ventilation air is not required, proceed to Step 9. If ventilation air is required, determine the minimum position setting for required airflow. See Fig. 23. Adjust minimum position setting by loosening the screws on the position setting bracket. See Fig. 24. Slide bracket until the top screw is in the position determined by Fig. 23. Tighten screws.

9.Remove tape from outdoor-air thermostat (OAT). Fasten OAT to inside of hood using screws and speed clips provided. See Fig. 25. Make sure OAT terminals are positioned up.

10.Replace outdoor-air opening panel using screws from Step 2. Replace filter access panel. Ensure the filter access panel slides along the tracks and is securely engaged.

11.Fasten hood top and side plate assembly to outdoor-air opening panel with screws provided.

12.Place knob supplied with economizer on OAT. See Fig. 25. Set OAT for 1.7° C (3° F) below indoor room thermostat setting. If accessory enthalpy control (EC) is used in place of OAT, see instructions shipped with EC for installation and adjustment. See Fig. 25.

13.Connect OAT per Fig. 26.

14.Slide outdoor-air inlet screens into screen track on hood side plate. While holding screens in place, fasten screen retainer to hood using screws provided.

NOTE: Refer to Fig. 27 for Durablade economizer barometric relief damper characteristics.

OUTDOOR-AIR	FILTER ACCESS
OPENING PANEL	PANEL

Fig. 17 — Access Panel Locations

12

ECONOMIZER	ECONOMIZER	ECONOMIZER	TOP
CONTROL BOARD	PLUG	MOTOR	SCREW

SHIPPING

SCREW

Fig. 20 — Durablade Economizer Installed in Unit

ECONOMIZER CONTROL BOARD

ECONOMIZER MOTOR

Fig. 18 — Outdoor-Air Hood Details

POSITION SETTING BRACKET

Fig. 21 — Horizontal Durablade Economizer

Installation (90 Degree Rotation)

Fig. 19 — Vertical Discharge Block-Off Plate

(48TF012, 014 Units Only)

BLOCK-OFF PLATE

Fig. 22 — Horizontal Discharge Block-Off Plate

13

Example:			OAT
		TOP	(TERMINALS ARE UP)
Given —
Negative Pressure . . . . . . . . . . . . . . . . . . . . . . . .	. 25	Pa (0.1 in. wg)
Outdoor Airflow . . .. . . . . . . . . . . . . . . . . . . . . . . .	520	L/s (1100 cfm)
Determine —
Setting = 150 mm (6 in.)

	Fig. 23 — Durablade Economizer Damper Minimum	UNIT
	Position Setting
		OUTSIDE AIR
		SCREEN

	0
1	ENTHALPY
	CONTROL
2
3
4	HOOD
5
6
7
8
9

OPEN

POSITIONMINIMUM

S

T

3

1

P

T1

4

2

5

P1

T ID

8 S

CONT

OR

CONT

%

1 R

Y

IMUH

9 U

UNPOWERED

24

90

C

A

30

60

70

8

T

ACT

CTS

3

ENTHALPY

60

DAMPER

1

A

5A

TE

2

m

10

D

CW

A

2

RA

SHO

TR

50

C

–

A

4

TINGS:

OUTDOOR

65

SETPOINTS

M

ST

HIGH

C

55

OPEN

B

3 .

WN

A

V

75

A

1

A

IN

CONTROL

F

A

RUN,

1

TR1

°

.

ENTHALPY

1

IN

TEMP

–

A

IN

5A

.

70

CCW

1

CLOSED DAMPER

T

3

8

VDC

.

0

85

REV.

97-3672

B

C

D S

O

RE V .

B

TR

Fig. 24 — Durablade Economizer Minimum	Fig. 25 — Outdoor-Air Thermostat/
Position Damper Setting	Enthalpy Control Installation

14

Fig. 26 — Wiring Connections for

Outdoor-Air Thermostat

	175			0.70
PRESSURE DROP (Pa)	150		PRESSURE DROP (in. wg)	0.60
	125			0.50
	100			0.40
	75			0.30
	50			0.20
	25			0.10
	0

0.00		200		400		600		800		1000		1200
						CFM
0		100		200		300		400		500		570
						L/s

Fig. 27 — Durablade Economizer Barometric Relief

Damper Characteristics

OPTIONAL ECONOMI$ER — See Fig. 28 for EconoMi$er component locations.

1.To remove the existing unit filter access panel, raise the panel and swing the bottom outward. The panel is now disengaged from the track and can be removed. Remove the indoor coil access panel and discard. See Fig. 29.

NOTE: If installing an optional Power Exhaust Assembly, refer to the EconoMi$er Power Exhaust Installation Instructions, then proceed to Step 6. Controller should be mounted in vertical position as shown in Fig. 28.

2.To assemble the hood assembly remove the EconoMi$er hood from its packaging. Locate the outdoor air opening panel. See Fig. 30.

3.Install the 19 mm x 19 mm (3/4 x 3/4-in.) seal strip on the exhaust air hood top panel. Install the 3 mm x 22 mm (1/8 x 7/8-in.) seal strip on the exhaust air hood side panels and bottom brackets. Assemble the exhaust air hood to the outdoor air opening panel as shown in Fig. 30, using the screws provided. Do not attach hood assembly to unit at this time.

4.Install the 3 mm x 22 mm (1/8 x 7/8-in. seal strip on the outdoor air hood top and side panels. Assemble the outdoor air hood to the outdoor air opening panel as shown in Fig. 31, using the screws provided. Do not attach com-

pleted hood (Fig. 32) assembly to the unit at this time.

ECONOMI$ER	CONTROLLER	GEAR-DRIVEN
PLUG		DAMPER
ACTUATOR

OUTDOOR AIR

TEMPERATURE

SENSOR

BAROMETRIC

RELIEF DAMPERS

Fig. 28 — EconoMi$er Component Locations

OUTDOOR-AIR	FILTER ACCESS
OPENING PANEL	PANEL

Fig. 29 — Typical Access Panel Locations

OUTDOOR AIR

OPENING PANEL EXHAUST AIR HOOD TOP

SCREEN

RETAINER

	EXHAUST AIR
SEAL STRIP	HOOD SIDES

EXHAUST AIR SCREEN

EXHAUST AIR BOTTOM BRACKET

Fig. 30 — Exhaust Air Hood Assembly

15