CARRIER Package Units(both Units Combined) Manual L0606340

User Manual: CARRIER CARRIER Package Units(both units combined) Manual CARRIER Package Units(both units combined) Owner's Manual, CARRIER Package Units(both units combined) installation guides

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48HJ015, 017
Single-Package Rooftop Units
Electric Cooling/Gas Heating

Installation, Start-Up, and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS ......................
1
INSTALLATION ................................
2-26
Step 1 -- Provide Unit Support ...................
2
• ROOF CURB
• ALTERNATE UNIT SUPPORT
Step 2 -- Rig and Place Unit .....................
2
• POSITIONING
• ROOF MOUNT
Step 3 -- Field Fabricate Ductwork ...............
7
Step 4 -- Make Unit Duct Connections ...........
7
Step 5 -- Install Flue Hood and Wind Baffle ...... 7
Step 6 -- Trap Condensate Drain .................
8
Step 7 -- Orifice Change .........................
8
Step 8 -- Install Gas Piping ......................
9
Step 9 -- Make Electrical Connections ...........
9
• FIELD POWER SUPPLY
• FIELD CONTROL WIRING
• OPTIONAL NON-FUSED DISCONNECT
• OPTIONAL CONVENIENCE OUTLET
Step 10- Make Outdoor-Air Inlet Adjustments. 10
Step 11 -- Install Outdoor-Air Hood .............
Il
Step 12- Install All Accessories ...............
12
• MOTORMASTER® I CONTROL INSTALLATION
Step 13 -- Adjust Factory-Installed Options ..... 12
• PREMIERLINK TM CONTROL
• ENTHALPY SWITCH/RECEIVER
• OUTDOOR ENTHALPY CONTROL
• DIFFERENTIALENTHALPY
CONTROL
• ENTHALPY SENSORS AND CONTROL
• OPTIONAL ECONOMI$ERIV AND ECONOMI$ER2
• ECONOMI$ERIV STANDARD SENSORS
• ECONOMI$ERIV CONTROL MODES
Step 14 -- Install Humidistat for
Optional MoistureMi$er TM Package ............
25
START-UP ....................................
27-37
Unit Preparation .................................
27
Operating Sequence ............................
35
SERVICE .....................................
37-44
TROUBLESHOOTING .........................
45-49
INDEX ...........................................
50
START-UP CHECKLIST ........................
CL-I
SAFETY

CONSIDERATIONS

Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electricfd components. Only trained and qualified service personnel should install, repaik or service at>conditioning equipment.
Untrained personnel can perform the basic maintenance
functions of cleaning coils and filters and replacing filters. All
other operations should be performed by trained service personnel. When working on at>conditioning equipment, observe

Manufacturer

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.

Before performing service or maintenance operations on
unit, turn off main power switch to unit and install lockout
tag to disconnect switch. Electricffl shock could cause personal injury.

1. [mproper instfdlation, adjustment, alteration, service,
or maintenance can cause property &image, personal
injury, or loss of life. Refer to the User's Information
Manual provided with this unit for more details.
2. Do not stole or use gasoline or other flammable
vapors and liquids in the vicinity of this or any oilier
appliance.
What to do if you smell gas:
1. DO NOT tU to light any appliance.
2. DO NOT touch any electrical switch, or use any
phone in your building.
3. IMMEDIATELY call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions.
4. If you cannot reach your gas supplier, call the fire
department.

Disconnect gas piping from unit when pressure testing fit
pressure greater than 0.5 psig. Pressures greater than
0.5 psig will cause gas valve damage resulting in hazmdous
conditions. If gas vfdve is subjected to pressure greater titan
0.5 psig, it must be replaced before use. When pressure
testing field-supplied gas piping fit pressures of 0.5 psig or
less, a unit connected to such piping must be isolated by
closing the manufd gas valve(s).

ating limits. If limits are exceeded, the units will automaticfdly lock the compressor out of operation. Manual beset of
I IMPORTANT:
Units
hightomnbient
temperature
the thermostat will
be have
required
restart the
compressocoper-

reserves the right to discontinue, or change at any time, specifications
Catalog No. 04-53480010-01

Printed in U.S.A.

or designs without notice and without incurring obligations.

Form 48HJ-30SI

Pg 1

4-06

Replaces:

48HJ-26SI

I
I

INSTALLATION

Step 2 --

Rig and Place Unit -- Do not diop unit;
keep uptight. Use spreader b_us over unit to prevent sling or
cable &image. Rollers may be used to move unit across a roof.
Level by using unit frame as a reference; leveling tolerance is
+ 1/16 in. per linear ft in any direction. See Fig. 3 for additiomfl
information. Unit operating weight is shown in Table 1.

Inspect unit for transpollation
dmnage. If &image is found,
file a claim with the transportation agency.

Step 1 --

Provide

Unit Support

ROOF CURB -- Assemble or inst_dl accessory roof curb or
horizont_d supply roof curb in accordance
with instructions
shipped with this accessory. See Fig. 1 and 2. Install insulation,
cant strips, roofing, and counter flashing as shown. Ductwork
can be installed to roof curb or horizontal supply roof curb
before unit is set in place. Curb or adapter roof curb must be
level. This is necessary to permit unit drain to function properly. Unit leveling tolerance is _+1/16in. per linear ft in any direction. Refer to Accessory Roof Curb or Horizont_d Supply Roof
Curb Installation Instructions
for additional information
as
required. When accessory roof curb or horizontal supply roof
curb is used, unit may be installed on class A, B, or C roof
covering material.

Four lifting holes are provided in ends of unit base rails as
shown in Fig. 3. Refer to rigging instructions on unit.
POSITIONING
-- Maintain clearance, per Fig. 4, around and
above unit to provide minimum distance from combustible materials, proper airflow, and service access.
Do not install unit in an indoor location. Do not locate air inlets near exhaust vents or other sources of contmninated all: For
proper unit operation, adequate combustion and ventilation air
must be provided in accordance with Section 5.3 (Air for Combustion and Ventilation) of the National Fuel Gas Code, ANSI
Z223.1 (American National Stan&trds Institute).
Although unit is weatherproof,
higher level runoff and overhangs.

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

guard against

water from

Ix)cate mechanical diafl system flue assembly at least 4 ft
from any opening through which combustion products could
enter the building, and at least 4 fl from any adjacent building.
When unit is located adjacent to public walkways, flue assembly must be at least 7 ft above grade.

ALTERNATE UNIT SUPPORT
-- When a curb or adapter
cannot be used, install unit on a noncombustible
surface.
Support unit with sleepers, using unit curb support area. If
sleepers cannot be used, support long sides of unit with a minimum of 3 equally spaced 4-in. x 4-in. pads on each side.

ROOF MOUNT -- Check
building
codes
for weight
distribution requirements.
Unit operating weight is shown in
Table 1.
hlstructions

25% VENTAIR/

continued

on page 7.

ECONOMIZER--_
HOOD
_._

BLOCK-OFF.J,_t

PAN

[

HORIZONTALSUPPLY
_
CURB (CRRFCURB013A00)
14-314 _

.,,_-

....

-\-TRANSITIONDUCT

FULLYINSULATED
SUPPLYPLENUM
2" X 1/4
r_ 1" INSULATION
SUPPORTTYP. /
1 1/2 # DENSITY,
STITCH WELDED/STICK
PINNED& GLUED
¢

[

\
12" WIDE STANDING
SEAM PANELS

NOTE: CRRFCURB013A00
is a fully factory preassembled horizontal
adapter and includes an insulated transition duct. The pressure drop
through the adapter curb is negligible.
For horizontal return applications: The power exhaust and barometric
relief dampers must be installed in the return air duct.

ACCESSORY
PACKAGE NO.
CRRFCURB013A00

CURB

DESCRIPTION

HEIGHT
1'-11"
(584

Pre-Assembled, Horizontal
Adapter Roof Curb

Fig. 1 -- Horizontal Adapter Roof Curb Installation

PKG. NO. REF.

CURB
HEIGHT

CRRFCURB010A00

1"-2" (305)

CRRFCURB011A00

2"-0" (610)

CRRFCURBO12A00

NOTES:
1, Roof curb accessory is shipped disassembled.
2. Insulated panels: 1" thick neoprene coated 11/2 Ib density.
3, Dimensions in ( ) are in millimeters.

DESCRIPTION

2'-0" (610)

Standard Curb 14" High
Standard Curb for Units
Requiring High Installation

Side Supply and Return
Curb for High Installation
5"_i0
//2
(1791)

_PLAN

ViEW

OF ROOF CURB

_OUILINE

SUPPLY

Direction

of airflow.

5. Roof curb: 16 ga. (VA03-56) stl.
6. A 90 degree elbow must be installed on the supply ductwork
below the unit discharge for units equipped with electric heaters.
7. To prevent the hazard of stagnant water build-up in the drain pan of the
indoor section, unit can only be pitched as shown.
OF

UNIT

RETURN
OPENING
CURB

i CON_ENSE_
i
i

(REF

5UPPLY

CONDENSATE

j
"ZNN

%.J

KEEP TH_5 AREA CLEAR FOR
POWER (GAB ENTRY FOR GAB FIRED

to" B 3/ID"
c/s2}

i COHPRESBOR

ATTACH

DUC]

ROOF

7 /3/5
(B04)

DRAIN

BBOFTOPS)

10 3/4
(578)

0 3//6
(310)
/-[NBULAFED

[

rR
CONDENSE ¸
AND
COlflPBEBSOR
END

T
(degrees and inches)

Deg. A
.28
UNH
• Fpom

FOR

!
/
i B,

CURB

ALL

PANEL

[_ _!__

UNIT
1"

DIMENSIONS*

L
/"

MITERED
CORNERS
(TOP ONLY)_

\ NN\

1 /5/iD_
(349)

TYP.

AND

/i
OP N NG)

SiDE

4 PLCS

0"i

Fig. 2 -- Roof Curb Details -- 48HJ015,017

in.
.45

LEVELING
edge
oF u_{t

Deg. B
.28
TOLERANCES
to hoe_zor/toL.

in.
.43

SPREADERBARS

"DETAIL

RIGGINGHOOK

(1105)

_._
SEE
"DETAIL

UNIT BASE RAIL

NOTES:
1. Dimensions in ( ) are in millimeters.
2. Refer to Fig. 4 for unit operating weights.
3. Remove boards at ends of unit and runners prior to rigging.
4. Rig by inserting hooks into unit base rails as shown. Use corner post from packaging to protect coil from
damage. Use bumper boards for spreader bars on all units.
5. Weights do not include optional economizer. Add 90 Ib (41 kg) for economizer weight.
6. Weights given are for aluminum evaporator and condenser coil plate fins.
7. Add 75 Ib (34 kg) for crating on 48HJ015 and 017 units.
8. Add 150 Ib (68 kg) for copper condenser coil. Add 280 Ib (127 kg) for copper condenser and evaporator
coils.

All panels must be in place when rigging.

UNIT
48HJ

DIMENSIONS

MAXIMUM SHIPPING
WEIGHT

ft-in.

015

1725

782

6-111/2

017

1800

816

6-111/2

B
mm

2121
mm
2121

Fig. 3 -- Rigging Details

4-0
ft-in.
3-2

1219
964

STD UNIT
WEIGHT

UNIT

CORNER
TYP

C4)

1 3/8"
(2121)

PLC5

(99)

o"-a we_,
c2o_) |

_1"-7

13/16"_1"-4

\1
I _

Ii_l

/I
|1

I I it
I', li

I I II

II it

/I
/|

)))/)

\\_///
_

AIR

I'II II
...... /_\ _
i1

I I

@/
/

I rl

I I

]

I 1

Yi li

I III

1(((]l//i I
t\\\\

I
_

II ,t

I',II

I {1 /1 "
I I II
D'- 0 3, 6j;qC_l it
(27_)
/
I_::_:_'
II
_LLJ'n'I

I/
I/

_
|

RETURN
AIR

]

....

I
_

//
/

///|

////

' _---J
I

•
U

(THRU

ft-in,

48HJD,
HJF015

1725

782

427

194

390

177

438

199

470

213

3-3

991

3-5

1051

1-10

559

48HJD,
HJF017

1800

816

417

189

399

181

481

218

503

228

3-2

961

3-8

1070

1-10

559

O'-S

15/16"

NOTES;

1. Refer to print for roof curb accessory dimensions.
2 D mens ons n ( ) are n m meters

_--_'_/_'1
_v_""_--_
i L
_
I1
Z_''--,

)

cover drip edge.
9 Seedrawng5OTd5OO352forservceoptondeta

Zo'-7 "_/_4"(2__)" I
Z 0"-7
314"_'_"
I
i

I I _
I
/ I I
_"7"-..J
\ I I ....
/,_-l""--_l
/I
I _z(6S2_
I
_
( I J
I
I
I

CURS POWER)

(1143)

(35)

-5)R"I
(17s3)

CDRNERWs"<,
5'O'O,ACONCEN='Cm shipping location.
2. Ix>osen the Allen bolt located on the disconnect switch.
The bolt is located on the square hole and is used to hold
the shaft in place. The shaft cannot be inserted until the
Allen bolt is moved.
3.

Fig. 12 -- Field Gas Piping

Carrier-approved
to the installation
thermostat assemspace to sense av-

Insert the disconnect shaft into the square hole on the disconnect switch. The end of the shaft is speci+dly cut and
the shaft can only be inserted in the correct orientation.

II
_II

FIELD
III

III

ZUJ
z z
0 not.u
o') o,.

P_OW_ER__l
c2 r=2

I
I
i
!

r-qN

EQUIP

I
L ..............

Make

-----

UNIT
100

Equipment
Ground
National Electrical Code
Terminal Board

SLK,

FIELD

200

F7
£3
ca

LOAD

POWER 5UPPLY

3L2

1L1

LINE

5L3

WIRING

BLK.

YEL.

BLU=

POWER

\C)

\@LOAD

FIELD

Z
_

UNIT

[

POWER

SUPPLY

NOTE: The disconnect
takestheplaceofTB-I as shown on the
unit wiring diagram label and the component arrangement label.

I--

Fig. 15-

Fig. 14 -- Field Control Thermostat Wiring

2T1

'N°'FUSEO
OI'OONNECT
L LI -_"E]

m
_

4T2

ASSEMBLY
[

RE_JUM_

6T3

BLU.

I N°Nu;IuTSE;°;EIRsO°NNEc\T
___ ______L]NE
J
UNIT

THERMOSTAT

WIRING
YEL.

Fig. 13 -- Field Power Wiring Connections

4.
5.
6.

Adjust-

NOTE: The maximum wire size for TB1 is 2/0.

££

Inlet

GND

LEGEND
EQUIP
GND
NEC
TB

Outdoor-Air

MANUAL OUTDOOR-AIR
DAMPER -- All units (except
those equipped with a factory-insLdled EconoMiSeltV)
have a
manual outdoor-air damper to provide ventilation all: (See
Step 12 for details on installing the EconoMiSerIV.)
Damper can be preset to a&nit up to 25% outdoor air into
return-air compartment. To adjust, loosen securing screws and
move dmnper to desired setting, then retighten screws to secure
damper (Fig. 16).

II_

L........

bLUO

Step 10 -ments

TBI
i r--i rzq

Optional

Non-Fused

Disconnect

Wiring

25% ADJUSTABLE
AIR DAMPER

Tighten the Allen bolt to lock the shaft into position.
Close the control box dool:
Attach the handle to the external access door with the two
screws provided. When the handle is in the ON position,
the handle will be vertical When the handle is in the OFF
position, the handle will be horizontal.
Turn the handle to the OFF position and close the dool:
The handle should fit over the end of the shall when the
door is closed.

BASE
UNIT

The handle must be in the OFF position to open the control box door

OPTIONAL
CONVENIENCE
OUTLET-On units with
optiomd convenience
outlet, a 115-v GF[ (ground fault interrupt) convenience outlet receptacle is provided for field wiring.
Field wiring should be run through the 7/s-in. knockout provided in the basepan near the return air opening.

SECURING

SCREWS

Fig. 16 -- Standard 25% Outdoor-Air
Section Details

Table 5 -- Electrical Data
UNIT
48HJ

015
(Standard
IFM)

015
(Optional
IFM)

017

VOLTAGE
RANGE

COMPRESSOR

Min

Max

RLA

LRA

RLA

LRA

Qty

208/230

187

253

20.7

158

20.7

156

0.5

1.7

2.9

8.8/ 8.4

480

414

508

0.5

0.8

2,9

4,2

575

518

833

8.2

0.5

0.75

3,9

208/230

187

253

20.7

186

20.7

156

0.5

1.7

3.7

480

414

508

0.5

0.8

3.7

208/230

187

253

32.1

195

20.7

156

0.5

1.7

48O

414

506

16.4

0.8

7,9

575

518

833

8.2

0.8

0.75

No, 1

IFM

OFM

No, 2

FkAlea

LEGEND
FLA
HACR
IFM
LRA
MCA
MOCP
NEC
OFM
RLA

----------

POWER
EXHAUST

NOMINAL
VOLTAGE
(3 Ph, 60 Hz)

FLA

10.5/11.0
4.8
15.8/15.8

COMBUSTION
FAN MOTOR

POWER
SUPPLY

LRA

FLA

MCA

MOCP*

4.6

18.8

0.57
0.57

60/60
65/65

80/80
80/80

2.3

6.0

0.3
0.3

29
31

35
40

2.1

4.8

0.57
0.57

28
27

30
30

4.6

18.8

0.57
0.57

82/83
87/87

80/80
80/80

2.3

8.0

0.3
0.3

30
32

35
40

4.8

18.8

0.57
0.57

82/82
88/88

110/110
110/110

2.3

8.0

0.3
0.3

41
43

50
50

2.1

4.8

0.57
0.57

31
34

40
45

Example: Supply voltage is 460-3-60.

Full Load Amps
Heating, Air Conditioning and Refrigeration
Indoor (Evaporator) Fan Motor
Locked Rotor Amps
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electrical Code
Outdoor (Condenser) Fan Motor
Rated Load Amps

AB = 452 v
BC = 464 v

Average Voltage =
AC = 455 v

=--

*Fuse or HACR circuit breaker,
Determine
(AB) 487
(BC) 464
(AC) 487

maximum
- 482 = 8
- 487 = 7
- 488 = 2

482 + 464 + 455
3
1371
3

= 457
deviation from average voltage.
v
v
v

Maximum deviation is 7 v.
Determine

percent of voltage imbalance.
7
% Voltage Imbalance = 100 x
48"7

_ST_

NOTES:
1. In compliance with NEC requirements 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. Canadian units may be
fuse or circuit 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

= 1.53%
This amount of phase imbalance
allowable 2%.

is satisfactory

as it is below the maximum

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

max voltage deviation from average voltage
average voltage

Step 11 --Install

Outdoor-Air

Hood

IMPORTANT:
If tile unit is equipped
with tile
optional EconoMiSer[V
component move tile outdoor
air temperature
sensor prior to installing the outdoorair hood.
See the optional
EconoMiSerIV
and
EconoMiSer2
section.

3.
4.
5.

The outdoor-air hood is common to 25% air ventilation and
EconoMiSerIV. If EconoMiSerIV is used, all electric_fl connections have been made and adjusted at file factory. Assemble
and inst_fll hood in the field.

NOTE: The hood top panel, upper and lower filter retainers,
hood c.hain pan, baffle (size 017), and filter support bracket are
secured opposite file condenser end of the unit. The screens,
hood side panels, remaining section of filter support bracket,
seal strip, and hmdware are in a package located inside tile
return-air filter access panel (Fig. 17).
1. Attach seal strip to upper filter retainer. See Fig. 18.

7.
8.
9.

Assemble hood top panel, side panels, upper filter retainer, and c.hain pan (see Fig. 19).
Secure lower filter retainer and support bracket to unit.
See Fig. 19. Leave screws loose on size 017 units.
Slide baffle (size 017) behind lower filter retainer and
tighten screws.
Ix)osen sheet metal screws for top panel of base unit
located above outdoor-air
inlet opening, and remove
screws for hood side panels located on tile sides of tile
outdoor-air inlet opening.
Matcll notches in hood top panel to unit top panel screws.
Insert hood flange between top panel flange and unit.
Tighten screws.
Hold hood side panel flanges flat against unit, and install
screws removed in Step 5.
Insert outdoor-air inlet screens and spacer in channel created by lower filter retainer and filter support bracket.
Attach remaining section of filter support bracket.

Step 12 -- Install

OUTDOOR*AIR
HOOD AND
MOUNTING
BRACKETS

All Accessories

Install all

field-installed accessories. Refer to the accessory installation
instructions included with each accessory.
MOTORMASTER®
I CONTROL
INSTALLATION
Install Field-Fabricated
Wind Baffles -- Wind baffles must
be field-fabricated
for all units to ensure proper cooling cycle
opelation at low ambient temperatures. See Fig. 20 for baffle
details. Use 20-gage, galwmized sheet metal, or similtu corrosion-resistant meted for baffles. Use field-supplied screws to attach baffles to unit. Screws should be l/4-in, diameter and
5/s-in. long. Drill required screw holes for mounting baffles.

FILTER
PACKAGEANE
HOOD
COMPONENTS

ACCESS

Fig.

To avoid dmnage to the refiigemnt coils and electric_d components, use recommended
screw sizes only. Use care
when drilling holes.

PANEL

17 -- Outdoor-Air

Hood

Component

Location

Install Motormaster
I Controls -- Only one Motormaster
I
control is required per unit. The Motormaster I control must be
used in conjunction with the accessory 0 ° F low mnbient kit
(purchased sep_uately). The Motormaster I device controls outdoor fan no. 1 while outdoor fans no. 2 and 3 are sequenced off
by the accessory 0 ° F low ambient kit.
Accessoiw 0 ° F Low Ambient Kit -- Install the accessory 0° F
low ambient kit per instruction supplied with accessory.
Sensor Assemb@ -- Install the sensor assembly in the location
shown in Fig. 21.

PANEL

UPPER FILTER
RETAINER

PAN

Motor MountTo ensure proper fan height, replace the existing motor mount with the new motor mount provided with
accessoq.
Tran.ffi, rmer (460 and 575-v Units Only) -- On 460 and 575-v
units, a transformer is required. The transformer is provided
with the accessory and must be field-inst_dled.

SEAL

Fig. 18 -- Seal Strip Location

Motormaster I Control -- Recommended
mounting location is
on the inside of the panel to the left of the control box. The
control should be mounted on the inside of the panel, vertically, with leads protruding from bottom of extrusion.

BAFFLE

Step 13\

LOWER FILTER
RETAINER
I

FILTER SUPPORT
BRACKET

\
\

HOOD SIDE
PANELS (2)

BAFFLE
"(017 ON LY)

LOWER
FI_ER
RETAINER

Options

NOTE: PremierLink controller version 1.3 and later is shipped
in Sensor mode. If used with a thermostat, the PremierLink
controller must be configured to Thermostat mode.

FIWER SUPPORT
BRACKET

HOOD DRAIN PAN
UPPER FILTER RETAINER

Fig. 19 -- Outdoor-Air

Factory-Installed

The PremierLink controller (see Fig. 22) requires the use of
a C_urier electronic thermostat or a CCN connection for time
broadcast to initiate its internal timeclock. This is necessmy for
broadcast of time of day functions (occupied/unoccupied).
No
sensors are supplied with the field-mounted PremierLink control. The factory-installed
PremierLink control includes only
the supply-air temperature (SAT) sensor and the outdoor air
temperature (OAT) sensor as standmd. An indoor air quality
(CO2) sensor can be added as an option. Refer to Table 6 for
sensor usage. Refer to Fig. 23 for PremierLink
controller
wiring. The PremierLink control may be mounted in the control panel or an area below the control panel.

HOOD TOP
PANEL

Adjust

PREM[ERLIN
K TM CONTROL
-- The PremierLink controller is available as a special order from the factory and is
compatible
with the Carrier Comfort
Network®
(CCN)
system. This control is designed to allow users the access and
ability to change factory-defined
settings, thus expanding the
function of the standmd unit control board. Carrier's diagnostic
standard tier display tools such as Navigato/rM
device or
Scrolling
Marquee
can be used with the PremierLink
controllel:

Hood Details
12

Install the Supply Air Temperature
Sensor (SAT) -- When
the unit is supplied with a factory-mounted
PlemierLink control, the supply-air temperature (SAT) sensor (33ZCSENSAT)
is factory-supplied
and wired. The wiring is routed from the
PremierLink control over the control box, through a grommet,
into the fan section, down along the back side of the fan, and
_dong the fan deck over to the supply-air opening.

t'_

BAFFLE TOP VIEW
78.12" _+0,125"
(1984 -+3)

The SAT probe is wi_e-tied to the supply-air opening (on the
horizontal opening end) in its shipping position. Remove the
sensor for installation. Re-position the sensor in the flange of
the supply-air opening or in the supply air duct (as required by
local codes). Drill or punch a I/2-in. hole in the flange or duct.
Use two field-supplied, self-drilling screws to secme the sensor
probe in a horizontal orientation.

r' (25) MIN _

/
÷

NOTE: The sensor must be mounted in the discharge ai_.steam
downstream of the cooling coil and any heating devices. Be
sure the probe tip does not come in contact with any of the unit
or heat surfaces.

10"(254)

(TYP)
-

40"
1016

Outdoor Air Temperature
(OAT) Sensor -- When the unit is
supplied with a factoq-mounted
PremierLink
control, the
outdoor-air temperature (OAT) sensor is factory-supplied
and
wired.

_10"(254)
-

. J/

3/4" (19) (TYP)--_
BAFFLE FRONT VIEW

+
_

(TYP)

----,-q 15"(381)
__(r','P)

Install the Indoor Air Quality (CO2) Sensor
-optional indoor air quality (CO2) sensor according
turer specifications.

:1"(25) MIN

NOTE: Dimensions in ( ) are in mm.
Fig. 20 --

Wind Baffle

A separate field-supplied
er the CO 2 sensoc

Details

transformer

Mount the
to manufac-

must be used to pow-

Wire the CO 2 sensor to the COM and IAQI terminals of J5
on the PremierLink controllec Refer to the PremierLink Installation, Start-Up, and Configuration
Instructions
for detailed
wiring and configuration information.

ENTHALPY SWITCH/RECEIVER--The
accessory
enthalpy switchheceiver
(33CSENTHSW)
senses temperatme
and humidity of the air sunounding the device and calculates
the enthalpy when used without an enthalpy sensoc The _elay is
energized when enthalpy
is high and deenergized
when
enthalpy is low (based on ASHRAE
[American Society of
Heating, Refrigeration and Air Conditioning Engineers] 90.1
criteria). If an accessoq
enthalpy sensor (33CSENTSEN)
is
attached to the return air sensor input, then differential enth_dpy
is c_dculated. The relay is energized when the enthalpy detected
by the return air enthalpy sensor is less than the enthalpy at the
enthalpy switch/receivec
The relay is deenergized when the
enthalpy detected by the return air enth_dpy sensor is greater
than the enth_dpy at the enthalpy switch/receiver
(diffe_entkd
enthalpy control). See Fig. 24 and 25.

MOTORMASTER-----.-LOCATION
SENSOR

OUTDOOR ENTHALPY
CONTROL
(Fig. 26) -- Outdoor
enthalpy control requires only an enthalpy switch/receiver
(33CSENTHSW).
The enthalpy switch/receiver is mounted in
the outdoor air inlet and c_dculates outdoor air enthalpy. The
enth_dpy switch/receiver
energizes the _elay output when the
outdoor enthalpy is above 28 Btu/lb OR dry bulb temperature
is above 75 F and is deenergized when the outdoor enthalpy is
below 27 Btu/lb AND diT bulb temperature is below 74.5 E
The relay output is wired to the unit economizer which will
open or close depending on the output of the switch.

_ _ _ :_
_

:_:_

NOTE: The enthalpy calculation
tude of 1000 ft above sea level.

is done using an average alti-

Mounting -- Mount the enthalpy switch/receiver
in a location
where the outdoor air can be sampled (such as the outdoor air
intake). The enthalpy switchheceiver
is not a NEMA 4
(Natiomd Electrical Manufactmers
Association) enclosure and
should be mounted in a location that is not exposed to outdoor
elements such as rain or snow. Use two field-supplied no. 8 x
3/4-in. TEK screws. Insert the screws through the holes in the
sides of the enthalpy switchheceiver

HAIRPIN END

NOTES:
1. All sensors are located on the eighth hairpin up from the bottom.
2. Field-installed tubing insulation is required to be installed over
the TXV (thermostatic expansion valve) bulb and capillary tube
for proper operation at low ambients. Tubing insulation is only
required on the portion of suction line located between indoor
and outdoor section.

Fig. 21 -- Motormaster I Sensor Locations
13

HVAC

SENSOR

INPUTS

SPACE TEMP
SET POINT
SUPPLY AIR TEMP
OUTDOOR

DUAL

TEMP

INDOOR

AIR QUALITY

OUTDOOR

AIR QUALITY

MODE

SENSOR

(STAT)

COMP SAFETY (Y1) J
FIRE SHUTDOWN
SUPPLY

(Y2) //_

FAN STATUS (Wl)

ENTHALPY

NOT USED (W2) %
/STATUS (ENTH)

/
CCN/LEN
PORT

NAVIGATOR
PORT

4-20MA
ECONOMIZER

INDOOR
FAN MOTOR

COMPR
1& 2

"-4 "--..
HEAT
LOW/HIGH

EXHAUST
RVS VALVE

OUTPUTS

Fig. 22 -- PremierLink

Controller

Table 6 -- PremierLink Sensor
APPLICATION
Differential

OUTDOOR
TEMPERATURE

AIR
SENSOR

RETURN
TEMPERATURE

Usage

AIR
SENSOR

OUTDOOR
AIR
ENTHALPY
SENSOR

RETURN AIR
ENTHALPY
SENSOR

Dry Bulb

Temperature
with
PremierLink*
(PremierLink
requires
4-20 mA
Actuator)
Single Enthalpy
with
PremierLink*
(PremierLink
requires
4-20 mA
Actuator)
Differential
Enthalpy
with PremierLink*
(PremierLink
requires
4-20 mA
Actuator)

Included -HH79NZ039

Required

33ZCT55SPT
or Equivalent

Included -Not Used

Required -33CSENTHSW
(HH57ZC003)
or
HH57AC077

*PremierLink
control requires Supply Air Temperature
sensor 33ZCSENSAT
and
Outdoor Air Temperature
sensor HH79NZ039
-- included with factory-installed
PremierLink
field-supplied
and field-installed
with field-installed
PremierLink control.
NOTES:
1. CO2 Sensors (Optional):
33ZCSENCO2
-- Room sensor (adjustable).
Aspirator box is required for duct mounting
33ZCASPCO2
-- Aspirator box used for duct-mounted
CO2 room sensor.
33ZCT55CO2
-- Space temperature
and CO2 room sensor with override.
33ZCT56CO2
-- Space temperature
and CO2 room sensor with override and setpoint.
2. All units include the following standard sensors:
Outdoor-air
sensor -- 50HJ540569
-- Opens at 67 F, closes at 52 F, not adjustable.
Mixed-air sensor -- HH97AZ001 -- (PremierLink
control requires supply air temperature
and outdoor air temperature
sensor HH79NZ039)
Compressor
lockout sensor -- 50HJ540570
--Opens
at 35 F, closes at 50 R

control;

of the sensor.

sensor

33ZCSENSAT

Required -33CSENTSEN
or
HH57AC078

BLUE
-

GRN

•

WH1

•

BLK
BRN
ORN

BRN

SAT
_

.._./PL1 - 6

PremierL_k
Con_ol

BRN
[_

VlO

BRN

•

VlO
BRN

BLU
__

- RED
--

_
OAT

BRN

BLU

PNK

GRN

YEL

BLU

WHT

RED
-RED

RED

- RED
-

PNK
RED

R
Y1

RED

Y2
Wl
W2
G

WNT
CL01

TB2

DDC CONTROL

CMP SAFE

TSTAT CONTROL
Y1

FSD

SFS

NOT USED

RMTOCC

FROM
IGC-G

LEGEND

ECONOMIZER
50TJ401148

(CRECOMZR01 OBO0)

L
I
_.z
L

TB2]

! 23
1
L

*If PremierLink control is in thermostat mode,
1-TB2 terminal designations for 24 vac discrete inputs, Default is for DDC control.

Fig. 23 -- PremierLink

Controls

Wiring

4-20ma
ECONO
MOTOR

CLO
-CMP
-ECONO-ENTH
-IGC
-MGV
-OAT
-PL
-SAT
-SPT
-TB
--

Compressor Lockout
Compressor
Economizer
Enthalpy Sensor
Integrated Gas Unit Controller
Main Gas Valve
Outdoor Air Temperature Sensor
Plug
Supply Air Temperature Sensor
Space Temperature Sensor
Terminal Block

can be used to power the enthalpy switch/receive_: To power the
enthalpy switch/receiver from the economizer harness, connect
power of the enthalpy switch/receiver
to the red and brown
wires (1 and 4) on the economizer htuness.

4253"
(I08 03ram)

For connection to rooftop units with PremierLink TM control,
connect the LOW Enthalpy terminal on the enthtdpy switch/
receiver to J4 -- pin 2 of the PremierLink
control on the
HVAC unit. The switch can be powered through the PremierLink control board if desired. Wire the 24 VAC terminal on the
enthalpy switch/receiver
to J4 -- pin 1 on the PremierLink
control. Wire the GND terminal on the enthalpy switch/
receiver to Jl -- pin 2 on the PremierLink control. The HI
Enthalpy terminal is not used. See Fig. 26.

,25'--,(6,35mm)

DIFFERENTIAL
ENTHALPY
CONTROL
(Fig. 27) -Diffe_enti_d enthalpy control requi_es both an enthalpy switch/
receiver
(33CSENTHSW)
and
tin
enthalpy
sensor
(33CSENTSEN).
The enthalpy switch/receiver
is mounted in
the outdoor air inlet and calculates outdoor air enthalpy. The
enthalpy sensor is mounted in the return airstream and calculates the enthalpy of the indoor ai_:

L_
v

Thermistor -_

i/i

Fig. 24 -- Enthalpy Switch/Receiver
(33CSENTHSW)

Humidity Sensor

Dimensions

The enthalpy switch/receiver
energizes the H[ Enthalpy
relay output when the outdoor enthalpy is greater than the
indoor enthalpy. The LOW Enthalpy terminal is energized
when the outdoor enthalpy is lower than the indoor enthalpy.
The relay output is wired to the unit economizer which will
open or close depending on the output of the switch.
NOTE: The enth_dpy calculation
altitude of 1000 ft above sea level.

is done using an average

Mounting -- Mount the enthalpy switch/receiver
in a location
where the outdoor air can be smnpled (such as the outdoor air
intake). The enthalpy switch/receiver
is not a NEMA 4 enclosure and should be mounted in a location that is not exposed to
outdoor elements such as rain, snow. or direct sunlight. Use
two field-supplied no. 8 x 3/4-in. TEK screws. Insert the screws
through the holes in the sides of the enthalpy switch/receive_:
Mount the enthalpy sensor in a location where the indoor air
can be smnpled (such as the return air duct). The enthalpy
sensor is not a NEMA 4 enclosure and should be mounted in a
location that is not exposed to outdoor elements such as rain or
snow. Use two field-supplied no. 8 x 3/4-in. TEK screws. [nsert
the screws through the holes in the sides of the enthalpy sensor:

4253"
(108 03mm)

33CSENTSEN

25"--

(6.35mm)

Wiring_ -- Carrier recommends
the use of 18 to 22 AWG
twisted pair or shielded cable for all winng. All connections
must be made with I/4-in. female spade connectors.

c_;33
-4 _4

The PremierLink TM board provides 24-vac to power the
enthalpy switch/receive_:
Connect the GND and 24 VAC
terminals on the enthalpy switch/receiver
to the terminals on
the transformer
On some applications, the power from the
economizer harness can be used to power the enthalpy switch/
receive_: To power the enthalpy
switch/receiver
fi_m the
economizer harness, connect power of the enthalpy switch/
receiver to the red and brown wires (1 and 4) on the economizer
harness.

IZh Hum,
'm'st°
.... ,iS
" nso

Connect the LOW Enthalpy terminal on the enthalpy
switch/receiver to J4 -- pin 2 of the PremierLink control on the
HVAC unit. The switch can be powered through the PremierLink control board if desired. Wire the 24 VAC terminal on the
enthalpy switch/receiver
to J4 -- pin 1 on the PremierLink
control. Wire the GND terminal on the enthalpy switch/
receiver to Jl -- pin 2 on the PremierLink control. The HI
Enthalpy termimfl is not used. See Fig. 26.

Fig. 25 -- Enthalpy Sensor Dimensions
(33CSENTSEN)
Wiring -- Career recommends
the use of 18 to 22 AWG
(Americtm Wire Gage) twisted pair or shielded cable for all
wiring. All connections
must be made with I/4-in. female
spade connectors.
A 24-vac transformer
switchheceiver;
as shown
provides 24 vac. Connect
the enthalpy switch/receiver
On some applications, the

Connect the 4-20 mA In terminal on the enthalpy switch/
receiver to the 4-20 mA OUT terminal on the return air
enthalpy sensor: Connect the 24-36 VDC OUT terminal on the
enthalpy switch/receiver to the 24-36 VDC IN terminal on the
return air enth_flpy sensor See Fig. 27.

is required to power the enthalpy
in Fig. 26, the PremierLink board
the GND and 24 VAC terminals on
to the terminals on the transforme_:
power from the economizer harness

(

0
e

/
O

...........L(OR

UNIT GROUND)

*Used with Differential Enthalpy Control only.

Fig. 26 -- Typical Wiring Schematic

-- Carrier Rooftop Unit with PremierLink

Enthalpy Switch/Receiver
Jumper Settings -- There are two
jumpe_:s. One jumper determines the mode of the enthalpy
switch/receive_: The other jumper is not used. To access the
jumpe_,
remove the 4 screws holding the cover on the
enthalpy switch/receiver
and then remove the cover. The
factory settings for the jumpers are M 1 and OFF.

Controls

controlle_: h)cme the controller in place of an existing economizer controller or ne_u the actuator: The mounting plate may
not be needed if existing bracket is used.
A closed contact indicates that outside air is preferred to the
_eturn air An open contact indicates that the economizer
should remain at minimum position.
Outdoor
Air
Enthalpy
Sensor/Enthalpy
Controller
(HH57AC077)
-- To wi_e the outdoor air enthalpy sensor:
perform the following (see Fig. 28 and 29):
NOTE: The outdoor air sensor can be removed from the back
of the enthalpy controller and mounted remotely.

The mode jumper should be set to M2 for differential
enthalpy control The factory test jumper should remain on
OFF or the enth_dpy switch/receiver will not c_dculate enth_dpy.
Enthalpy Sensor Jumper Settings -- There are two jumpers.
One jumper determines the mode of the enthalpy sensoc The
other jumper is not used. To access the jumpers, remove the
4 screws holding the cover on the enthalpy sensor and then
remove the covet The factory settings for the jumpers _ue M3
and OFF.

1. Use a 4-conductor: 18 or 20 AWG cable to connect the
enth_dpy control to the PremierLink controller and power
transformeE
2.

NOTE: The enthalpy control must be set to the "D" setting for
differential enthalpy control to work properly.

Connect the following 4 wires from the wire harness
located in rooftop unit to the enthalpy controller:
a. Connect the BRN wire to the 24 vac terminal (TRI)
on enthalpy control and to pin 1 on 12-pin harness.
b. Connect the RED wire to the 24 vac GND terminal
(TR) on enthalpy sensor and to pin 4 on 12-pin
harness.
c. Connect the GRAY/ORN
wire to J4-2 on PremierLink controller
and to terminal (3) on enthalpy
sensoL
d. Connect the GRAY/RED
wire to J4-1 on PremierLink controller and to terminal (2) on enthalpy sensor:

The enthalpy
control receives
the indoor and return
enthalpy from the outdoor and return air enthalpy sensors
and provides a dry contact switch input to the PremierLink

NOTE: If installing in a Carrier roollop, use the two gray wires
provided from the control section to the economizer to connect
PremierLink controller to termimds 2 and 3 on enthalpy sensor:

The mode jumper should be set to M3 for 4 to 20 mA
output. The factory test jumper should remain on OFF or the
enthalpy sensor will not calculate enthalpy.
ENTHALPY SENSORS AND CONTROL
-- The enthalpy
control (HH57AC077)
is supplied as a field-installed accessory
to be used with the EconoMi$er2
damper control option. The
outdoor air enthalpy sensor is part of the enthalpy control. The
separate field-installed
accessory return _ur enthalpy sensor
(HH57AC078)
is required for differential enthalpy control.

120 VAC
LINE VOLTAGE

24 VAC OUTPUT FROM N/C CONTACT WHEN
THE
OUTDOOR ENTHALPY IS LESS THAN THE
INDOOR ENTHALPY

r
4

ORN

24 VAC OUTPUT FROM N/O CONTACT WHEN THE
INDOOR ENTHALPY IS GREATER THAN THE
OUTDOOR ENTHALPY
4-20 24-36
mA VDC
IN OUT

HI LOW GND 24
ENTHALPY
VAC

33CSENTHSW

24-36 4-20
VDC
mA
IN
OUT

"_,

SETTINGS

FOR 33CSENTHSW
O

JUMPER SETTINGS

FOR 33CSENTSEN

lloOo
o] IloOoOo
o

LEGEND
---

33CSENTSEN

JUMPER

N/C
N/O

Normally Closed
Normally Open

Fig. 27 -- Differential Enthalpy Control Wiring

ENTHALPY

CONTROLLER
TRI-_ITR1
i-LI,_IL_I

A( Csorh+G-

BRN
RED

sRrh ÷[]- --1

+ ENTHALPY
(OUTDOORAIR
I
SENSOR)

BLK _S
RED

HH57AC077
ENTHALPY
CONTROL AND
OUTDOOR AIR
ENTHALPY SENSOR

[_S (RETURN AIR I
[] + ENTHALPY
SENSOR
G RAY/O R N

.-WIRE HARNESS

LED
GRAY/RED

JlN

UNIT

HH57AC078 ENTHALPY
SENSOR (USED WITH
ENTHALPY CONTROL
FOR DIFFERENTIAL
ENTHALPY OPERATION)

NOTES:
1. Remove factory-installed jumper across SR and + before connecting wires from return air sensor.
2. Switches shown in high outdoor air enthalpy state. Terminals 2
and 3 close on low outdoor air enthalpy relative to indoor air
enthalpy,
3. Remove sensor mounted on back of control and locate in outside airstream.

Fig. 28 -- Outdoor and Return Air Sensor Wiring
Connections for Differential Enthalpy Control
÷
MOUNTING

PLATE

e
Fig. 29 -- Differential Enthalpy Control,
Sensor and Mounting Plate (33AMKITENT006)

ECONOMISERIV

Return Air Enthalpy Sensor -- Mount the return-air enthalpy
sensor (HH57AC078)
in file return-air duct. The return tfir
sensor is wiled to the enthalpy controller (HH57AC077).
The
outdoor enthalpy changeover set point is set tit the controllec
To wire the return air enthalpy
ing (see Fig. 28):

SENSORS

Outdoor Air Temperature
(OAT) Sensor -- The outdoor air
temperature sensor (HH57AC074)
is a 10 to 20 mA device
used to measure the outdoor-air temperature. The outdoor-air
temperature is used to determine when the EconoMiSerIV
can
be used for free cooling. The sensor must be field-relocated.
See Fig. 30. The operating range of temperature measurement
is 40 to 100 E

sensol: perform the follow-

1. Use a 2-conductor.
18 or 20 AWG. twisted pair cable to
connect the return air enthalpy sensor to the enthalpy
controllec

Supply Air Temperature
(SAT) Sensor
-- The supply air
temperature sensor is a 3 K thermistor located at the inlet of the
indoor fan. See Fig. 31. This sensor is factory installed. The operating range of temperature measurement is 0 ° to 158 E See
Table 9 for sensor temperature/resistance
values.

At the enthalpy control remove the factory-installed
resistor from the (SR) and (+) terminals.
3. Connect file field-supplied
RED wire to (+) spade
connector on the return air enthalpy sensor and the (SR+)
terlninal on the enthalpy controllec Connect the BLK
wire to (S) spade connector on the return tfir enthtflpy
sensor and the (SR) terminal on the enthalpy controller.
OPTIONAL
ECONOMISERIV
AND ECONOM[$ER2
-See Fig. 30 and 31 for EconoMiSerIV
component locations.
See Fig. 32 for EconoMiSer2 component locations.

The temperature sensor looks like an eyelet terminal with
wires running to it. The sensor is located in the "crimp end"
and is sealed from moisture.
Low Temperature
Compressor
Lockout Switch
-The
EconomiSerIV is equipped with an ambient temperature lockout switch located in the outdoor airstream which is used to
lock out the compressors below a 42 F ambient temperature.
See Fig. 25.

NOTE: These instructions
are for installing the optional
EconoMiSer[V
and EconoMiSer2 only. Refer to the accessory
EconoMiSerIV
or EconoMiSer2 installation instructions when
field inst_dling tin EconoMi$erIV
or EconoMiSer2 accessory.
To complete inst_dlation of the optional EconoMiSerIV.
form the following procedure.

STANDARD

SUPPLY
AIR
TEMPERATURE
LOCATION

SENSOR

per-

1. Remove the EconoMiSerIV
hood. Refer to Step 11 -Install Outdoor-Air Hood on page 11 for information on
removing and installing the outdoor-tfir hood.
2.

Relocate
position
Fig. 30.

outdoor air temperature sensor from shipping
to operation position on EconoMiSerIV.
See

ECONOMI$ER

in
the EconoMi$erlV
IMPORTANT:
Failurenottooperating
relocate properly.
the sensor will result
3.

Re-inst_dl economizer

Install all EconoMiSerIV
accessories.
wiring is shown in Fig. 33. EconoMiSer2
in Fig. 34.

hood.
EconoMiSerIV
wiring is shown

FLANGE

(HIDDEN)

Outdoor air leakage is shown in Table 7. Return air pressure
drop is shown in Table 8.

F
Fig. 31 -- EconoMi$erlV
Component
Side View

OUTDOOR AIR
TEMPERATURE SENSOR
SCREWS
/\

ECONOMI$ER IV
/

FRAME

FRAME SCREWS (INSTALLED OPERATION
_u_"
\
POSITION)

EconoMi$erlV

Component
End View

Locations

SCREWS

TOP \

SCREWS

Fig. 30 --

ECONOMISER2

Locations

_'_tt

-Fig. 32-

EconoMi$er2

Component

Locations

YEL
'PNK

-BLU
REO

ORN

ACCESSORY
)
REWOTEWIN
POS(T(ON POT

__
BLK

SET

10V
EEONOM($ER (v

SENSOR (3k Ohm)
DISC.ARGE
B LK--w,_4_0
AIR -

[AOSENSOR I_. _l

POS

Ml_

[]

(

)

_l I_

Zv 10v

USEOI
1

OA T

II
PLI =8

TO MAIN
CONTROL

PLI_5

80X

PL1-6

BLU-RETURN

AIR

.fill

TEMPI

[NTHALPY SENSOR

DE V

SET
lOv

ErI

COOL

._r

/
t t

PL1 -I

E.TNAL_
SE.SOR_l_l
_'_
SO+_

PLI_ll

TEMPI

BLU

t _
I I

PNK --3_
LAL$

( I FIELD

SPLICE

& _

BRN

PL1-2
RED
pck1-10
_" (NOl USED)

FIELD

SPLICE

ECONONI

LEGEND
DCV -- Demand Controlled Ventilation
IAQ -- Indoor Air Quality
LALS-- Low Temperature Compressor
Lockout Switch
OAT -- Outdoor-Air Temperature
POT -- Potentiometer

Potentiometer Default Settings:
Power Exhaust
Middle
Minimum Pos.
Fully Closed
DCV Max.
Middle
DCV Set
Middle
Enthalpy
C Setting

ZER

MOTOR

NOTES:
1. 620 ohm, 1 watt 5% resistor should be removed only when using differential
enthalpy or dry bulb.
2. If a separate field-supplied 24 v transformer is used for the IAQ sensor power
supply, it cannot have the secondary of the transformer grounded.
3. Fer field-installed
remote minimum position POT, remove black wire jumper
between P and P1 and set control minimum position POT to the minimum
position.

Fig. 33 -- EconoMi$erlV Wiring

4
3
7
RED
500 OHM

2
8

RESISTOR-

PINK

NOTE 1
BLUE

OAT
BLACK
NOTE2

50HJ540573
ACTUATOR
ASSEMBLY

11
9
WHITE

DIRECT DRIVE
ACTUATOR

LEGEND

ECONOMI$ER2

OAT -- Outdoor Air Temperature Sensor
NOTES:
1. Switch on actuator must be in run position for economizer to operate.
2. 50HJ540573 actuator consists of the 50HJ540567 actuator and a harness with 500-ohm resistor.

Fig. 34 -- EconoMi$er2 Wiring
20

PLUG

Table 7 -- Outdoor

Air Damper

Leakage

by the free cooling set point potentiometer
located on the
control. See Fig. 35. The scale on the potentiometer is A, B, C,
and D. See Fig. 36 for the corresponding
temperatme
changeover values.

DAMPER STATIC PRESSURE (in. wg)
0.2
0.4
0.6
0.8
1.0
1.2
35
53
65
75
90
102

LEAKAGE (cfm)

Table 10 -- EconoMi$erlV Sensor Usage
Table 8 --

Return

Air Pressure

Drop (in. wg)

CFM

ECONOMISERIV
WITH OUTDOOR
DRY BULB SENSOR

APPLICATION

Accessories

4500
0.040
Table

5000
0.050
9 --

5400
0.060

7200
0.090

7500
0.100

Outdoor
Air
Dry Bulb
Differential
Dry Bulb

Supply Air Sensor Temperature/
Resistance
Values

TEMPERATURE (F)
-58
-40
-22
-4
14
32
50
68
77
86
104
122
140
158
176
185
194
212
230
248
257
266
284
302
ECONOMI$ERIV

6000
0.070

CONTROL

Single

53,010
29,091

HH57AC078
HH57AC078
and
CRENTDIF004A00*

33ZCSENCO2

CO2 for DCV
Control using a
Duct-Mounted
CO2 Sensor

16,590
9,795
5,970
3,747
3,000
2,416
1,597
1,080
746
525
376
321
274
203
153
116
102
89
70
55

air dry bulb sensor
installed.

CRTEMPSN002A00*

Enthalpy

CO2 for DCV
Control using a
Wall-Mounted
CO2 Sensor

100,680

Required

None. The outdoor
is factory

Differential
Enthalpy

RESISTANCE (ohms)
200,250

AIR

and
33ZCASPCO2**
33ZCSENCO21-

CRCBDiOX005A001-1-

*CRENTDIF004A00
and CRTEMPSN002A00
accessories
are used on
many different base units. As such, these kits may contain parts that
will not be needed for installation.
1-33ZCSENCO2
is an accessory CO2 sensor.
**33ZCASPCO2
is an accessory
aspirator
box required
for ductmounted applications.
1-1-CRCBDIOX005A00
is an accessory that contains both 33ZCSENCO2
and 33ZCASPCO2
accessories.

FAN SET POINT
LED
WHEN EXHAUST
CONTACT IS MADE
MINIMt
POSITION

SETTING

MAXtMI
DEMAND CONTROL
VENTILATION
SET POINT
LED kl(
DEMAND CONTROL
VENTILATION
INPUT
IS ABOVE SET POINT

MODES
VENTILATION

a controllec The EconoMiSer2 is operated by a 4 to 20 mA
sign_fl from an existing field-supplied controller (such as
IMPORTANT: Tile optional EconoMiSer2 does not include
PremierLink TM control). See Fig. 34 for wMng information.

SET POINT

LED LIGHTS WHEN
OUTDOOR AIR IS
SUITABLE FOR
FREE COOLING
FREE COOLING / ENTHALP_'
CHANGEOVER
SET POINT

Detennine the EconoMiSerlV control mode befole set up of
the control. Some modes of operation may lequile diffelent sensol:s. Refer to _Pable 10. Tile EconoMiSerIV is supplied from the
factory with a supply air temperature sensok a low tempemtme
compressor lockout switch, and an outdoor air tempemtme
sensoc This ;dlows for operation of the EconoMiSerIV
with
outdoor air Ny bulb changeover control. Additional accessories
can be added to allow for diffelent types of changeover control
and operation of the EconoMi$erIV and unit.

Fig. 35 -- EconoMi$erlV
Controller
and LED Locations
19

Potentiometer

"%_,

LEDON

,7
16= --

Outdoor Dry Bulb Changeover
-- The stan&trd controller is
shipped from the factory configmed
for outdoor dry bulb
changeover control. The outdoor air and supply air temperature
sensors are included as stan&trd. For this control mode, the outdoor temperature is compmed to an adjustable set point selected
on the control If the outdoor-air temperature is above the set
point, the EconoMiSerIV will adjust the outdoor-air &tmpel:s to
minimum position. If file outdoor-air temperature is below the
set point, file position of the outdoor-air &tmpers will be controlled to provide free cooling using outdoor air. When in this
mode, the LED next to the free cooling set point potentiometer
will be on. The changeover temperature set point is controlled

- LED OFF

LED ON

_14

LED OFF

-LED OFF L_

LED ON-- --

11
10
9
40

DEGREES FAHRENHEIT

Fig. 36 -- Outside Air Temperature
Changeover Set Points

1 O0

Differential Dry Bulb Control -- For differential dry bulb
control the standard outdoor d U bulb sensor is used in conjunction with an additional accessory return air sensor (part number
CRTEMPSN002A00).
The accessory sensor must be mounted
in the return tfil.stream. See Fig. 37. Wiring is provided in the
EconoMiSer[V wiring harness. See Fig. 33.

Indoor Air Quality dAQ) Sensor Input -- The IAQ input can
be used for demand control ventikttion (DCV) control based on
the level of CO 2 measured in the space or return air duct.
Mount the accessory IAQ sensor according to manufacturer
specifications. The IAQ sensor should be wired to the AQ and
AQI terminals of the controller Adjust the DCV potentiometers to correspond to file DCV voltage output of the indoor air
quCdity sensor at the user-determined
set point. See Fig. 40.

In this mode of operation, file outdoor-air temperature is
compared to the return-tfir temperature and the lower temperature airstream is used for cooling. When using this mode of
changeover control, turn the free cooling/enthalpy
set point
potentiometer fi.flly clockwise to the D setting. See Fig. 35.

If a separate field-supplied transformer is used to power the
IAQ sensor, the sensor must not be grounded
or the
EconoMiSerIV control board will be damaged.

Outdoor Enthalpy Changeover
-- For enthalpy control, accessory enthalpy sensor (part number HH57AC078)
is bequiredi Replace the standiu'd outdoor dry bulb temperature sensor with the accesso U enthalpy sensor in the same mounting
location. See Fig. 30. When the outdoor air enthalpy rises
above the outdoor enthalpy changeover set point, the outdoorair damper moves to its minimum position. Tile outdoor
enthalpy changeover set point is set with the outdoor enthalpy
set point potentiometer on the EconoMiSerIV
controllel: The
set points are A, B, C, and D. See Fig. 38. The factory-installed
620-ohm jumper must be in place across terminals SR and SR+
on the EconoMi$erIV controllel: See Fig. 33 and 39.

Exhaust Set Point Adjustment
-- The exhaust set point will
determine when the exhaust fan runs based on damper position
(if accessory power exhaust is installed). The set point is modified with the Exhaust Fan Set Point (EXH SET) potentiometer.
See Fig. 35. The set point represents the dmnper position above
which the exhaust fan will be turned on. When there is a call
for exhaust, the EconoMiSerIV
controller provides a 45 _+15
second delay before exhaust fan activation to allow the dampers to open. This delay allows the damper to reach the appropriate position to avoid unnecessary fan overload.
Minimum Position Control -- There is a minimum damper
position potentiometer
on the EconoMiSerlV
controllel: See
Fig. 35. The minimum dmnper position maintains file minimum airflow into the building during the occupied period.

Differential Enthalpy Control
-- For differential
enthalpy
control, the EconoMi$erIV
controller uses two enthalpy sensors (HH57AC078
and CRENTDIF004A00),
one in the outside tfir and one in the return _fil.stream on the EconoMiSerIV
frmne. The EconoMi$erlV
controller compares the outdoor _fir
enthalpy to the leturn tfir enthalpy to determine EconoMiSer[V
use. The controller selects the lower enthalpy air (return or outdoor) for cooling. For example, when the outdoor air has a lower enthalpy than the return air and is below the set point, the
EconoMiSerIV opens to bring in outdoor air for free cooling.

When using demand ventilation, the minimum damper position lepresents the minimum ventilation position for VOC
(volatile organic compound)
ventilation requirements.
The
maximum demand ventilation position is used for fully occupied ventilation.
When demand
minimum position
cupied ventilation
position should be

Replace the standard outside air diy bulb temperature sensor with the accesso U enth_dpy sensor in the same mounting
location. See Fig. 30. Mount the return air enthalpy sensor in
the return airstream.
See Fig. 37. The outdoor enthalpy
changeover set point is set with the outdoor enthalpy set point
potentiometer
on the EconoMi$erIV
controllec When using
this mode of changeover control, turn the enth_dpy set point
potentiometer fiJlly clockwise to the D setting.
NOTE: Remove
sor is installed.

620-ohm

resistor if differential

enthalpy

ventilation control is not being used, the
potentiometer should be used to set the ocposition. The maximum demand ventilation
turned fully clockwise.

Adjust the minimum position potentiometer
to _dlow the
minimum amount of outdoor air. as required by local codes, to
enter the building. Make minimum position adjustments with
at least 10° F temperature difference between the outdoor and
return-air temperatures.
To determine the minimum
following procedure:

sen-

position

setting, perform

1. Calculate the appropriate mixed-air temperature
following formula:
OA
RA
(To x l---ff_ ) + (TR x _
= TM

the

using the

T o = Outdoor-Air Temperature
OA = Percent of Outdoor Air
T R = Return-Air Temperature
RA = Percent of Return Air
T M = Mixed-Air

Temperature

As an example, if local codes require 10% outdoor
during occupied conditions, outdoor-tilt temperature
60 E and return-air temperature is 75 E

air
is

(60 x. 10) + (75 x .90) = 73.5 F
2.

Disconnect

the supply-air sensor from terminals T and TI.

Ensure that
terminals P
used, make
Fig. 33 and
turned fully
Connect 24

the factory-installed jumper is in place across
and PI. If lemote damper positioning is being
sure that the termimds are wired according to
that the minimum position potentiometer
is
clockwise.
vac across termimds TR and TRI.

4.
RETURN
AIR
TEMPERATURE
OR ENTHALPY
SENSOR

IAQ
SENSOR

Fig. 37 --

Return
Sensor

Air Temperature
or Enthalpy
Mounting
Location
22

Cmefully adjust the minimum position potentiometer
until file measured mixed-tilt temperatme
matches the
calculated v_due.

Reconnect

the supply-air

sensor to terminals

T and TI.

85
(29)

CONTROL

CONTROL POINT

CURVE

APPROX. °F (°C)
AT 50% RH

73 (23)

B
C
D

70/21)
67/19)
63 (17)

90
(32)

95
(35)

100
(38)

105
(41)

110
(43)

\
\

>I
_HIGH

LIMIT
CURVE

35
(2)

40
(4)

45
(7)

APPROXIMATE

50
(10)
DRY

55
(13)
BULB

60
(16)

65
(18)

70
(21)

75
(24)

TEMPERATURE--

Fig. 38 -- Enthalpy

80
(27)

85
(29)

90
(32)

95
(35)

I_-]1 P1

Changeover

Set Points

CO 2 SENSOR MAX RANGE SEqq-ING

TRr'_'-_

T_
5000

2V_10V

1t0
(43)

6OOO

I_HI_ ItHI (O_so,
N_l_JI

105
(41)

°F (°C)

100
(38)

EXh_

Vac
COM
24 824
Vac
HOT
'_7

4000
+800

ppm

.......
3000
_1_-,_

T_l_--J

M*AOn
O
\Q1

DCV

v
oo,O

sou
SR+

L?IU_ SR_I__J

"-_\

_1000

Open

.......
_

2000

z
©
O
w

1000

+900

Free

DAMPER
EF_

EF1

3
VOLTAGE

5
FOR

Fig. 40 -- 002 Sensor

A_LLT/o
L

Fig. 39 -- EconoMi$erlV

ppm
ppm

2V --10V

ppm

_1100

Controller

MAX

VENTILATION

Maximum

8
RATE

Range

Setting

Remote
controloftheEconoMi$erW
damper
isdesirable
whenrequitingadditiomdtempor_wy
ventilation.
If a
field-supplied
lemotepotentiometer
(Honeywell
partnumber
$963B
1128)
iswiredtotheEconoMi$erIV
controllel_
theminimumposition
ofthedamper
canbecontrolled
fromaremote
location.
Tocontrol
theminimum
damper
position
lemotely,
remove
thefactory-installed
jumperonthePandPl terminals
onthe
EconoMi$erlV
controllec
Wirethefield-supplied
potentiometertothePandPl terminals
ontheEconoMi$erlV
controllec
SeeFig.39.
Damper
Movement
-- Damper
movement
fiomfull opento
fullclosed
(orvicevelsa)
t:_es21/2
minutes.
Thermostats
-- The EconoMi$erIV
control works with conventional thermostats that have a YI (cool stage 1), Y2 (cool
stage 2), WI (heat stage 1), W2 (heat stage 2), and G (fan). The
EconoMi$erIV
control does not support space temperature
sensors. Connections are made at the thermostat terminal connection board located in the main control box.
Occupancy Control -- The factory default configuration for
the EconoMi$erIV
control is occupied mode. Occupied status
is provided by the red jumper from terminal 9 to terminal 10 on
TB2. When unoccupied
mode is desired, install a fieldsupplied timeclock function in place of the jumper between
terminals 9 and 10 on TB2. See Fig. 33. When the timeclock
contacts ;u'e closed, the EconoMi$erlV
control will be in
occupied mode. When the timeclock contacts are open (removing the 24-v signal fi:om termimfl N), the EconoMi$erIV
will
be in unoccupied mode.
Demand Controlled Ventilation (DCV)
EconoMi$erIV
for demand controlled
some equipment selection criteria which
When selecting the heat capacity and
equipment, the maximum ventilation rate
design conditions. The maximum dmnper
culated to provide the desired fiesh till:

T M = Mixed-Air Temperature
Once base ventilation has been determined, set the minimum damper position potentiometer to the correct position.
The same equation can be used to determine the occupied or
maximum ventilation rote to the building. For example, an output of 3.6 volts to the actuator provides a base ventilation rate
of 5% and an output of 6.7 volts provides the maximum ventilation rate of 20% (or base plus 15 cfm per person). Use Fig. 40
to determine the maximum setting of the CO 2 sensor. For example, a 1100 ppm set point relates to a 15 cfm per person design. Use the 1100 ppm curve on Fig. 40 to find the point when
the CO 2 sensor output will be 6.7 volts. Line up the point on
the graph with the left side of the chart to determine that the
range configuration for the CO 2 sensor should be 1800 ppm.
The EconoMiSerIV controller will output the 6.7 volts from the
CO 2 sensor to the actuator when the CO 2 concentration in the
space is at 1100 ppm. The DCV set point may be left at 2 volts
since the CO 2 sensor voltage will be ignored by the
EconoMiSerIV
controller until it rises above the 3.6 volt
setting of the minimum position potentiometel:
Once the fully occupied dmnper position has been determined, set the maximum dalnper demand control ventilation
potentiometer to this position. Do not set to the maximum position as this can result in over-ventilation to the space and potential high-humidity levels.
CO_2 Sensor Configuration
-- The CO 2 sensor has preset
standard voltage settings that can be selected anytime after the
sensor is powered up. See Table 11.

-- When using the
ventilation, there tue
should be considered.
cool capacity of the
must be evaluated for
position must be cal-

Use setting 1 or 2 for Carrier equipment. See Table 11.
1. Press Clear and Mode buttons. Hold at least 5 seconds
until the sensor enters the Edit mode.

Typically the maximum ventilation rate will be about 5 to
10% more than the typical cfin required per peLson, using
normal outside air design criteria.

Press Mode twice. The STDSET

Menu will appem:

Use the Up/Down
Table 11.

Press Enter to lock in the selection.

Press Mode to exit and resume norm_d operation.

button to select the preset numbel: See

The custom settings of the CO2 sensor can be changed anytime after the sensor is energized. Follow the steps below to
change file non-stan&rd
settings:
1. Press Clear and Mode buttons. Hold at least 5 seconds
until the sensor enters the Edit mode.

A proportional anticipatory strategy should be taken with
the following conditions: a zone with a large area, varied occupancy, and equipment that cannot exceed the required ventilation rate at design conditions. Exceeding the required ventilation rate means the equipment can condition air at a maximum
ventilation rate that is greater than the lequired ventilation rate
for maximum occupancy. A proportional-anticipatory
strategy
will cause the fresh air supplied to increase as the room CO2
level increases even though the CO 2 set point has not been
reached. By the time the CO 2 level reaches the set point, the
dmnper will be at maximum ventilation and should mtfint;fin
the set point.
In order to have the CO2 sensor control the economizer
dmnper in this manner, first determine the damper voltage output for minimum or base ventilation. Base ventilation is the
ventilation required to remove contaminants
during unoccupied periods. The following equation may be used to determine
the percent of outside-tfir entering the building for a given
damper position. For best results thele should be at least a
10 degree difference in outside and _etum-air temperatures.

2.
3.

Press Mode twice. The STDSET Menu will appeal:
Use the Up/Down button to toggle to the NONSTD menu
and press Entel:

Use the Up/Down button to toggle through each of the
nine variables, starting with Altitude, until file desired setting is reached.

Press Mode to move through the variables.

Press Enter to lock in the selection,
continue to the next v;uiable.

then press Mode to

Dehumidification
of Fresh Air with DCV Control -- Information from ASHRAE indicates that the largest humidity load
on any zone is the fresh air introduced. For some applications,
a field-supplied energy recovery unit is added to reduce the
moisture content of the flesh air being brought into the building
when the enthalpy is high. In most cases, the normal heating
and cooling processes are mole than adequate to remove the
humidity loads for most commercial applications.

OA
RA
(To x 1-i--0-0) + (TR x 1-i--0-0= TM
T o = Outdoor-Air Temperature
OA = Percent of Outdoor Air
TR = Return-Air

RA = Percent of Return Air

If normal rooftop heating and cooling operation is not adequate for the outdoor humidity level, an energy recovery unit
and/or a dehumidification
option should be considered.

Temperatme

Table 11
SETTING

EQUIPMENT

2
3
4
5

Sensor Standard
ANALOG
OUTPUT

Settings

CO2
CONTROLRANGE
(ppm)
0-2000

1000

Proportional

Any

2-10V
7-20 mA

0-2000

1000

Exponential

Any

0-10V
4-20 mA

0-2000

1100

Proportional

0-10V
4-20 mA

0-1100

1100

Proportional

0-10V
4-20 mA

0- 900

900

0-1100

1100

900

5000

500

Exponential

0-10V
4-20 mA

Exponential

0-10V
4-20 mA

0- 900

Proportional

0-10V
4-20 mA

0-9999

Proportional

0-10V
4-20 mA

0-2000

Health

Parking/Air
Intakes/
Loading Docks

& Safety

RELAY
HYSTERESIS
(ppm)

0-10V
4-20 mA

Economizer

OPTIONAL
RELAY SETPOINT
(ppm)

Any

Proportional
Interface w/Standard
Building Control System

CO 2

VENTILATION
RATE
(cfm/Person)

OUTPUT

7OO

LEGEND
ppm -- Parts Per Million

Step 14 -- Install Humidistat
for Optional
MoistureMi$er
TM Package
-- MoistureMiSer dehu-

Route thermostat cable or equivalent single leads of colored wire fiom Humidistat terrninals through conduit in
unit to the low voltage connection on the 2-pole terminal
strip (TB3) as shown in Fig. 41 and Fig. 42. See Fig. 43
for operational diagram.

midification package operation can be controlled by fiield
installation of a Carrier-approved
humidistat.
To install tile
bumidistat perforln the following procedure:
1. Locate humidistat on a solid interior wall in the conditioned space. Location should be a well ventilated area
to sense average humidity.

MOISTUREMI$ER

_-_YEL

BLK

/_r_YEL

TO CRANKCASE
/ HEATER CIRCUITS

// !

BLK_

TRAN1TM

TRAN3

4_E

GRN-YEL

"BLK

BLK

LEGEND
CB
LLSV

---

LPS
-TB
-TRAN-

Circuit Breaker
Liquid Line Solenoid
Valve
Low-Pressure Switch
Terminal Block
Transformer

LLSV1

S-LPS1
CB4

FACTOR

TB3

3.2 AMPS

(OR HUMIDISTATIF

S LPS2

USED)

Fig. 41 -- Typical MoistureMi$er Dehumidification Package
Humidistat Wiring Schematic (460 V Unit Shown)
25

LLSV2_

BLK-

FIE_D
CONTROL
WIRER6
J|

--/

FACTORY INSTALLED JUMPED
IRE_OVE IF HDMIDISTA[
IS USED}

Fig. 42 -- Typical MoistureMi$er TM Dehumidification
Package Control Box

CONDENSER

COIL_

DISCHARGE
OUTDOOR

AIR
SUBCOOLERo
COIL
EQUALIZER
LINE

SUCTION
CRANKCASE
HEATER

1
/

LIQUID
EVAPORATOR
COIL

\
3-WAY
I

BULB
S-LPS
SUB COOLER CONTROL
LOW PRESSURE SWITCH

TXV
EQUALIZER

TXV"

Thermostatic

Expansion Valve

Fig. 43 -- MoistureMi$er

Dehumidification

Package Operation

Diagram

VALVE

START-UP
on

CRANKCASE
HEATER(S)Crankcase heater(s) is energized as long as there is power to the unit and the compressor is
not operating.

-- Check that unit has been installed in
with these installation instructions and all applica-

start-up.
Otherwise,
to compressor
may
result.
IMPORTANT:
Unit &_mage
power must
be on for 24
hom_
prior to ]

Use the following infonnation and Start-Up
page CL-I to check out unit PRIOR to start-up.

Checklist

Unit Preparation
accordance
ble codes.

COMPRESSOR
spring mounted.
down bolts.

EVAPORATOR
FANFan belt and vmiable pulleys me
factoq-installed.
Remove
tape from the fan pulley. See
Tables 12-17 for fan performance data. Be sure that fans rotate
in the proper direction. See Table 18 for air quantity limits. See
Table 19 for evaporator fan motor specifications. See Tables 20
and 21 for static pressure information
for accessories
and
options. See Table 22 for fan rpm at various motor pulley
settings. To alter fan performance, see Evaporator Fan Performance Adjustment section on page 38.

MOUNTING
-- Compressors are internally
Do not loosen or remove compressor hold-

REFRIGERANT
SERVICE PORTS -- Each lefiigerant system has a total of 3 Schrader-type service gage ports. One port
is located on the suction line, one on the compressor discharge
line, and one on the liquid line. In addition Schmder-type
valves are located underneath file low-pressme
switches. Be
sure that caps on the ports are tight.

NOTE: A 31/2-in. bolt and threaded plate are included in the
installer's packet. They can be added to the motor support
channel below the motor mounting plate to aid in raising the
fan motolt

COMPRESSOR
ROTATION
-- It is important to be certain
the compressors me rotating in the proper direction. To determine whether or not compressors
are rotating in the proper
direction:
1. Connect
fittings.

service gages to suction and discharge

pressure

Energize the compressoc

The suction pressure should chop and the discharge
sure should rise, as is normal on any start-up.

pies-

If the suction pressure does not drop and the discharge
sure does not rise to normal levels:

pies-

1. Note that the evaporator
the wrong direction.

fan is probably

Tnrn off power to the unit.

Reverse any two of the incoming

Turn on power to the compressol:

CONDENSER-FANS
AND MOTORS-Condenser
fans
and motors gu'efactol T set. Refer to Condenser-Fan Adjustment
section (page 40) as required. Be sure that fans rotate in the
proper direction.
RETURN-AIR
FILTERS -- Check that correct filters are installed in filter tracks (see Table 1). Do not operate unit without
return-air filte_.s.

also rotating

OUTDOOR-AIR
INLET SCREENS
-- Outdoor-air
screens must be in place before operating unit.

GAS HEAT
follows:

inlet

-- Verify gas plessures before turning on heat as

1. Turn off manual gas stop.
power leads.

Connect pressure
Fig. 12).

gage to supply gas pressure

The suction and discharge pressure levels should now move
to their normal start-up levels.

Connect
valve.

gage to manifold

NOTE: When compressors are rotating in the wrong direction,
the unit will have incleased noise levels and will not provide
heating and cooling.

Turn on manual gas stop and set thermostat to HEAT
position. After the unit has run for several minutes, verify
that incoming pressure is 5.5 in. wg or greater, and that
the manifold pressure is 3.3 in. wg. If manifold pressure
must be adjusted, refer to Gas Vtdve Adjustment section
on page 40.

After unit has been in operation for 5 minutes, check temperature rise across the heat exchangel.s. See unit informative plate for correct rise limits of the heat supplied.
Air quantities may need to be adjusted to bring the actual
rise to within the allowable limits.

After a few minutes of reverse operation, the scroll compressor internal overload protection will open, which will
activate the unit's lockout and requires a manual reset. Reset is
accomplished by turning the thermostat on and off.
INTERNAL
WIRINGCheck all electrical connections in
unit control boxes; tighten as required.

pressure

tap (see

tap on gas

Table 12 -- Fan Performance -- 48HJD015 (Low Heat Units with Standard Indoor Fan Motor)*
AIRFLOW
(CFM)
3750
4000
4250
4500
4750
5000
5250
5500
5750
6000
6250

Rpm

Watts

Bhp

Rpm

Watts

Bhp

649
675
701
726
751
775
798
822
844
867
889

895
1014
1141
1274
1415
1563
1719
1884
2058
2243
2438

0.94
1.08
1.24
1.40
1.58
1.76
1.96
2,17
2,39
2,62
2,86

665
696
725
754
783
811
839
866
893
920
946

967
1097
1236
1382
1538
1702
1875
2060
2256
2464
2687

1.03
1.18
1.35
1.54
1.73
1.94
2.16
2,39
2,64
2,90
3.17

AIRFLOW
(CFM)
3750
4000
4250
4500
4750
5000
5250
5500
5750
6000
6250

AVAILABLE
0.4

0.2

Watts
1756
1931
2114
2304
2504
2712

Rpm
747
776
804
832
859
886
911
937
962
987
.........

AVAILABLE EXTERNAL
1.4

1.2
Rpm
997
1023
1048
1073
1096
1119

EXTERNAL

Bhp
2.01
2.23
2.46
2.70
2.94
3.20

Rpm
Watts
1030
1988
1054
2173
1076
2366
1098
2566
1119
2775
............

Bhp
2.30
2.53
2.77
3.02
3.28

Rpm
1094
1116
1137
.........
.........

LEGEND
Bhp
FlOP
Watts

----

STATIC
0.6

PRESSURE

(in. wg)
0.8

1.0

Watts

Bhp

Rpm

Watts

Bhp

Rpm

Watts

Bhp

1150
1292
1442
1599
1765
1940
2125
2321
2528
2748

1.25
1.42
1.61
1.81
2.02
2.24
2.47
2,72
2,97
3.24

821
849
877
903
929
954
979
1003
1026
......

1342
1495
1656
1824
2001
2188
2384
2592
2810

1.49
1.68
1.88
2.09
2.32
2.55
2.80
3,05
3.32

892
919
945
970
995
1019
1042
---

1527
1689
1859
2037
2224
2419
2625
---

1.72
1.92
2.14
2.36
2.60
2.84
3.09
---

Bhp
2.94
3.19

Rpm
1214
--

Watts
2769
--

STATIC PRESSURE
1.6
Watts
2236
2431
2634

Bhp
2.61
2.86
3.10

Rpm
1156
1176
......

(in. wg)
1.8
Watts
2497
2702

2.0
Bhp
3.27
--

2. Static pressure losses (i.e., economizer) must be added to external static pressure before entering Fan Performance table.
3. Interpolation is permissible. Do not extrapolate.
4. Fan performance
is based on wet coils, clean filters, and
casing losses. See Tables 20 and 21 for accessory/FlOP
static
pressure information.
5. Extensive motor and drive testing on these units ensures that the
full bhp and watts range of the motor can be utilized with confidence. Using fan motors up to the watts or bhp rating shown will
not result in nuisance tripping or premature motor failure. Unit
warranty will not be affected.
6. Use of a field-supplied motor may affect wiring size. Contact your
Carrier representative for details.

Brake Horsepower
Factory-Installed Option
Input Watts to Motor

*Standard low-medium static drive range is 895 to 1147 rpm. Alternate high-static drive range is 1040 to 1315 (for 208/230 and 460-v
units). The alternate high-static drive is not available for 575-v
units. Other rpms require a field-supplied drive.
NOTES:
1. Maximum continuous bhp for the standard motor is 3.13 (for 208/
230 and 460-v units) or 3.38 (for 575-v units), The maximum continuous watts is 2700 (for 208/230 and 460-v units) or 3065 (for
575-v units). Do net adjust motor rpm such that motor maximum
bhp and/or watts is exceeded at the maximum operating cfm.

Table 13 -- Fan Performance -- 48HJD015 (Low Heat Units with Optional Indoor Fan Motor)*
AIRFLOW
(CFM)
375O
4000
4250
4500
4750
5000
5250
5500
5750
6000
6250

6000
6250

EXTERNAL

----

(in. wg)
0.8

1.0

Watts

Bhp

Rpm

Watts

Bhp

Rpm

Watts

Bhp

Rpm

Watts

Bhp

Rpm

Watts

Bhp

895
1014
1141
1274
1415
1563
1719
1884
2058
2243
2438

0.94
1.08
1.24
1.40
1.58
1.76
1.96
2.17
2.39
2.62
2.86

665
696
725
754
783
811
839
866
893
920
946

967
1097
1236
1382
1538
1702
1875
2060
2256
2464
2687

1.03
1.18
1.35
1.54
1.73
1.94
2.16
2.39
2.64
2.90
3.17

747
776
804
832
859
886
911
937
962
987
1011

1150
1292
1442
1599
1765
1940
2125
2321
2528
2748
2981

1.25
1.42
1.61
1.81
2.02
2.24
2.47
2.72
2.97
3.24
3.52

821
849
877
903
929
954
979
1003
1026
1049
1072

1342
1495
1656
1824
2001
2188
2384
2592
2810
3042
3286

1.49
1.68
1.88
2.09
2.32
2.55
2.80
3.05
3.32
3.60
3.88

892
919
945
970
995
1019
1042
1065
1087
1108
1130

1527
1689
1859
2037
2224
2419
2625
2841
3069
3308
3559

1.72
1.92
2.14
2.36
2.60
2.84
3.09
3.36
3.63
3.91
4.20

AVAILABLE EXTERNAL
1.4

1.2
Rpm
997
1023
1048
1073
1096
1119
1142
1163
1184

Watts
1756
1931
2114
2304
2504
2712
2931
3160
3399

Bhp
2.01
2.23
2.46
2.70
2.94
3.20
3.46
3.74
4.01

Rpm
1030
1054
1076
1098
1119
1140
1159
1179

Watts
1988
2173
2386
2566
2775
2993
3220
3457

Bhp
2.30
2.53
2.77
3.02
3.28
3.54
3.81
4.08
4._6

Rpm
1094
1116
1137
1157
1177
1196
1214
23
_

65
_:94:28

Field-supplied

STATIC PRESSURE
1.6
Watts
2236
2431
2634
2844
3062
3288
3523
_76_

Bhp
2.61
2.86
3.10
3.36
3.62
3.89
4.16
j4_
_.? _

(in. wg)
1.8
Watts
2497
2702
2914
3133
3360
3592
_32
40
_2

2.0
Bhp
2.94
3.19
3.44
3.70
3.97
4.24
4;5_ '
_478
06

56:1:5
#_7 ;;;563:

Watts
2769
2984
3206
3433
3666

Bhp
3.27
3.53
3.79
4.05
47_

39
5
_

3. Static pressure losses (i.e., economizer) must be added to external static pressure before entering Fan Performance table.
4. Interpolation is permissible. Do not extrapolate.
5. Fan performance
is based on wet coils, clean filters, and
casing losses. See Tables 20 and 21 for accessory/FlOP
static
pressure information.
6. Extensive motor and drive testing on these units ensures that the
full bhp and watts range of the motor can be utilized with confidence. Using fan motors up to the watts or bhp rating shown will
not result in nuisance tripping or premature motor failure. Unit
warranty will not be affected.
7. Use of a field-supplied motor may affect wiring size. Contact your
Carrier representative for details.

Brake Horsepower
Factory-Installed Option
Input Watts to Motor

*Standard low-medium static drive range is 895 to 1147 rpm. Alternate high-static drive range is 1040 to 1315. Other rpms require a
field-supplied drive.
NOTES:
1. i i

PRESSURE

649
675
701
726
751
775
798
822
844
867
889

LEGEND
Bhp
FlOP
Watts

STATIC
0.6

Rpm

AIRFLOW
(CFM)
3750
4000
4250
4500
4750
5000
5250
5500
5750

AVAILABLE
0.4

0.2

motor.

2. Maximum continuous bhp for the optional motor is 4.26. The
maximum continuous watts is 3610, Do not adjust motor rpm
such that motor maximum bhp and/or watts is exceeded at the
maximum operating cfm.

Table 14 -- Fan Performance -- 48HJD017 (Low Heat Units)*
AIRFLOW
(CFM)
4500
4800
5100
5700
6000
6300
6600
6900
7200
7500

----

PRESSURE

(in. wg)
0.8

1.0

Watts

Bhp

Rpm

Watts

Bhp

Rpm

Watts

Bhp

Rpm

Watts

Bhp

Rpm

Watts

Bhp

1307
1384
1465
1911
2164
2439
2737
3057
3401
3770

1.53
1.62
1.72
2.24
2.54
2.86
3.21
3.59
3.99
4.42

761
790
820
882
914
947
980
1013
1047
1081

1330
1515
1718
2182
2444
2729
3035
3364
3717
4095

1,86
1.78
2.01
2.56
2.87
3.20
3.56
3.95
4.36
4.80

840
866
893
950
980
1010
1041
1072
1104
1136

1572
1765
1977
2459
2730
3023
3338
3675
4037
4423

1,84
2.07
2.32
2.88
3.20
3.55
3.91
4.31
4,74
5.19

912
936
961
1014
1042
1070
1099
1129
1159
1189

1822
2023
2243
2741
3021
3322
3645
3991
4361
4755

2,14
2.37
2.63
3.21
3.54
3.90
4.28
4.68
5,11
5.58

980
1002
1025
1075
1100
1127
1155
1183
1211
1241

2080
2289
2516
3029
3317
3626
3957
4311
4689
5091

2,44
2.68
2.95
3.55
3.89
4.25
4.64
5,06
5,50
5.97

Bhp
3.74
4.01
4.31
4.97
5.34
5.74

Rpm
1271
1287
1304
1341
1361
--

Watts
3481
3720
3979
4558
4880
--

Bhp
5.53
5.84

Rpm
1511
--

Watts
5042
--

AVAILABLE EXTERNAL
1.4

1.2
Rpm
1044
1065
1086
1132
1157
1182
1208
1235
1262

Watts
2345
2561
2795
3324
3619
3935
4274
4636
5021

Bhp
2.75
3.00
3.28
3.90
4.24
4.62
5.01
5.44
5.89

Watts
3781
4025
4290
4881

Bhp
3.07
3.33
3.61
4.25
4.60
4.98
8.39
8.82

Rpm
1163
1180
1199
1240
1262
1285
1309
.........

AVAILABLE EXTERNAL
2.4

2.2
Rpm
1322
1337
1353
1388

Rpm
Watts
1105
2619
1124
2841
1144
3082
1187
3624
1210
3925
1234
4249
1259
4598
1285
4964
............

Bhp
4.43
4.72
5,03
5.72

Rpm
Watts
1372
4088
1386
4337
1401
4607
............

Bhp
4.79
5.09
5.40

Rpm
1419
1433
1448

LEGEND
Bhp
FlOP
Watts

STATIC
0.6

753
747
741
810
844
879
918
950
986
1022

AIRFLOW
(CFM)
4500
4800
5100
5700
6000
6300
6600
6900
7200
7500

EXTERNAL

Rpm

AIRFLOW
(CFM)
4500
4800
5100
5700
6000
6300
6600
6900
7200
7500

AVAILABLE
0.4

0.2

STATIC PRESSURE
1.6
Watts
2899
3127
3375
3929
4239
4569
4922

Bhp
3.40
3.67
3.96
4.61
4.97
5.36
8.77

Rpm
1218
1235
1252
1291
1312
1334
......

STATIC PRESSURE
2.6
Watts
4400
4655
4930

Bhp
5.16
5.46
5.78

Rpm
1466
1479
......

(in. wg)
1.8
Watts
3187
3420
3674
4241
4557
4894

2.0

(in. wg)
2.8
Watts
4719
4978

Bhp
4.08
4.36
4.67
5.35
8.72
--

3.0
Bhp
5.91
--

Brake Horsepower
Factory-Installed Option
Input Watts to Motor

*Standard low-medium static drive range is 873 to 1021 rpm. Alternate high-static drive range is 1025 to 1200. Other rpms require a
field-supplied drive.
NOTES:
1. Maximum continuous bhp for the standard motor is 6.13. The
maximum continuous watts is 5180. Do not adjust motor rpm
such that motor maximum bhp and/or watts is exceeded at the
maximum operating cfm.

Table 15 -- Fan Performance -- 48HJF015 (High Heat Units with Standard Indoor Fan Motor)*
AIRFLOW
(CFM)
3750
4000
4250
4500
4750
5000
5250
5500
5750
6000
6250

Rpm

Watts

Bhp

Rpm

628
660
691
721
751
781
810
839
868
896
924

888
1015
1151
1295
1448
1610
1783
1967
2163
2373
2596

0.93
1.09
1.25
1.43
1.62
1.82
2.04
2.27
2.52
2.78
3.06

684
717
749
780
810
841
871
900
929
958
............

AIRFLOW
(CFM)
3750
4000
4250
4500
4750
5000
5250
5500
5750
6000
6250

AVAILABLE
0.4

0.2

Watts
1829
2010
2198
2395
2601
2816

Bhp

1027
1168
1317
1474
1641
1817
2003
2200
2410
2634

1.08
1.25
1.43
1.62
1.83
2.06
2.29
2.54
2.81
3.09

Rpm
761
793
823
853
882
911
939
967
994
.........

AVAILABLE EXTERNAL
1.4

1.2
Rpm
975
1002
1028
1053
1077
1101

Watts

EXTERNAL

Bhp
2.07
2.30
2.54
2.79
3.05
3.31

Rpm
Watts
1041
2091
1066
2279
1090
2474
1114
2675
............
............

Bhp
2.36
2.60
2.86
3.11

Rpm
1099
1124
1147
.........

LEGEND
Bhp
FlOP
Watts

----

STATIC
0.6

PRESSURE

(in. wg)
0.8

1.0

Watts

Bhp

Rpm

Watts

Bhp

Rpm

Watts

Bhp

1234
1388
1550
1719
1896
2081
2277
2482
2699

1.30
1.48
1.68
1.89
2.12
2.36
2.61
2.87
3.15

835
865
894
923
951
978
1005
1031
......

1454
1620
1793
1973
2159
2353
2556
2768

1.53
1.73
1.96
2.17
2.41
2.66
2.93
3.20

906
935
963
989
1016
1041
1066
--

1584
1756
1937
2126
2326
2536
2757
--

1.79
2.01
2.24
2.47
2.72
2.98
3.25
--

Bhp
2.97
3.23

Rpm
1219
--

Watts
2801
--

STATIC PRESSURE
1.6
Watts
2343
2540
2743

Bhp
2.65
2.90
3.17

Rpm
1161
1183
......

(in. wg)
1.8
Watts
2521
2738

2.0
Bhp
3.30
--

Brake Horsepower
Factory-Installed Option
Input Watts to Motor

*Standard low-medium static drive range is 895 to 1147 rpm. Alternate high-static drive range is 1040 to 1315 (for 208/230 and 460-v
units). The alternate high-static drive is not available for 575-v
units. Other rpms require a field-supplied drive.
NOTES:
1. Maximum continuous bhp for the standard motor is 3.13 (for 208/
230 and 460-v units) or 3.38 (for 575-v units). The maximum continuous watts is 2700 (for 208/230 and 460-v units) or 3065 (for
576-v units). Do not adjust motor rpm such that motor maximum
bhp and/or watts is exceeded at the maximum operating cfm.

Table 16 -- Fan Performance -- 48HJF015 (High Heat Units with Optional Indoor Fan Motor)*
AIRFLOW
(CFM)
3750
4000
4250
4500
4750
5000
5250
5500
5750
6000
6250

EXTERNAL

----

PRESSURE

(in. wg)
0.8

1.0

Watts

Bhp

Rpm

Watts

Bhp

Rpm

Watts

Bhp

Rpm

Watts

Bhp

Rpm

Watts

Bhp

628
660
691
721
751
781
810
839
868
896
924

888
1015
1151
1295
1448
1610
1783
1967
2163
2373
2596

0,93
1.09
1.25
1.43
1.62
1.82
2,04
2.27
2.52
2.78
3.06

684
717
749
780
810
841
871
900
929
958
986

1027
1168
1317
1474
1641
1817
2003
2200
2410
2634
2872

1,08
1.25
1,43
1.62
1.83
2.06
2.29
2.54
2.81
3.09
3.38

761
793
823
853
882
911
939
967
994
1021
1047

1234
1388
1550
1719
1896
2081
2277
2482
2699
2929
3172

1,30
1.48
1.68
1.89
2.12
2.36
2.61
2.87
3.15
3.43
3.74

835
865
894
923
951
978
1005
1031
1056
1081
1106

1454
1620
1793
1973
2159
2353
2556
2768
2990
3225
3473

1,53
1.73
1.95
2.17
2.41
2.66
2.93
3.20
3.48
3.78
4.09

906
935
963
989
1016
1041
1066
1090
1114
1137

1584
1756
1937
2126
2326
2536
2757
2991
3237
3497

1,79
2.01
2.24
2.47
2.72
2.98
3.25
3.54
3.83
4.13

1.2

AVAILABLE EXTERNAL
1.4

Rpm
Watts
Bhp
Rpm
Watts
Bhp
Rpm
975
1829
2.07
1041
2091
2.36
1099
1002
2010
2.30
1066
2279
2.60
124
1028
2198
2.54
1090
2474
2.86
147
1053
2395
2.79
1114
2675
3.11
170
1077
2601
3.05
1136
2885
3.38
191
1101
2816
3.31
1158
3104
3.65
1212
1124
3042
3.59
1179
3332
3.93
1146
3279
3.88
1200
3570
4.22
1168
3528
4.17
iiiii_i220 iiiiiii_i_' i iiii!_ii_iiii!ii'
i _i_il
ii _89iii,i,i,iiiiii_!_iiiil
i_ii_3_!iiiiiil_08_i!iiiiii _i_iiiiiii!!i Nti
iiiiiii_,!,_!!!lliii14062:1:iiii_iiTBiiiiiiiiiiii_,!5_ii
_ iiiii_ii_!!! ;
LEGEND

Bhp
FlOP
Watts

STATIC
0.6

Rpm

AIRFLOW
(CFM)
3750
4000
4250
4500
4750
5000
5250
5500
5750
6000
6250

AVAILABLE
0.4

0.2

STATIC PRESSURE
1.6
Watts
2343
2540
2743
2951
3168
3392

Bhp
2.65
2.90
3.17
3.43
3.71
3.99

N _i Nt_B :

,,,,,,,,s
m

(in. wg)
1.8

2.0

Watts
2521
2738
2962
3194
3435
363 l

Bhp
2.97
3.23
3.50
3.78
4.06

'N,_

NN'

Brake Horsepower
Factory-Installed Option
Input Watts to Motor

*Standard low-medium static drive range is 895 to 1147 rpm. Alternate high-static drive range is 1040 to 1315. Other rpms require a
field-supplied drive.
NOTES:
1.
Field-supplied motor.
2. Maximum continuous bhp for the standard motor is 4.26. The
maximum continuous watts is 3610. Do not adjust motor rpm
such that motor maximum bhp and/or watts is exceeded at the
maximum operating cfm.

Table 17 -- Fan Performance -- 48HJF017 (High Heat Units)*
AIRFLOW
(CFM)
4500
4800
5100
5700
6000
6300
6600
6900
7200
7500

----

PRESSURE

(in. wg)
0.8

1.0

Watts

Bhp

Rpm

Watts

Bhp

Rpm

Watts

Bhp

Rpm

Watts

Bhp

Rpm

Watts

Bhp

1307
1384
1571
2054
2329
2628
2951
3298
3672
4072

1.53
1.62
1.84
2,41
2,73
3,08
3,46
3,87
4,31
4.78

786
818
850
918
952
987
1023
1059
1095
1131

1404
1603
1822
2323
2607
2915
3246
3603
3986
4394

1.65
1.88
2.14
2,73
3,06
3,42
3.81
4.23
4,67
5.15

861
890
920
982
1015
1047
1081
1115
1149
1184

1644
1852
2079
2598
2891
3207
3547
3912
4303
4720

1.93
2.17
2.44
3,05
3,39
3.76
4.16
4,59
5,05
5.54

932
958
986
1044
1074
1105
1136
1168
1201
1234

1893
2108
2344
2879
3180
3504
3853
4225
4625
5050

2.22
2.47
2.75
3,38
3,73
4,11
4.52
4,96
5,42
5.92

997
1022
1048
1102
1130
1160
1190
1220
1251
--

2150
2373
2616
3166
3474
3807
4163
4543
4950
--

2.52
2.78
3.07
3.71
4.08
4.46
4,88
5,33
5.81
--

Bhp
3.81
4.10
4,42
5,13
5,52
5.94

Rpm
1282
1299
1319
1360
1382
--

Watts
3542
3795
4071
4686
5029
--

Bhp
5,60
5.92

Rpm
1518
--

Watts
5095
--

AVAILABLE EXTERNAL
1.4

1.2
Rpm
1060
1082
1106
1157
1184
1212
1241
1270

Watts
2414
2644
2894
3459
3774
4114
4478
4866

Bhp
2.83
3,10
3,39
4,06
4,43
4.83
5.25
5.71

Watts
3841
4100
4380
5007

Bhp
3.15
3,43
3,73
4,41
4,79
5.19
5.63

Rpm
1175
1195
1216
1262
1287
1312
1338

AVAILABLE EXTERNAL
2.4

2.2
Rpm
1332
1349
1367
1407

Rpm
Watts
1119
2685
1140
2922
1163
3178
1211
3757
1236
4080
1263
4427
1290
4798
............

Bhp
4,50
4.81
5.14
5.87

Rpm
Watts
1381
4145
1397
4409
1414
4695
............

Bhp
4,86
5.17
5.51

Rpm
1428
1443
1460

LEGEND
Bhp
FlOP
Watts

STATIC
0.6

753
747
775
849
886
924
962
1000
1038
1077

AIRFLOW
(CFM)
4500
4800
5100
5700
6000
6300
6600
6900
7200
7500

EXTERNAL

Rpm

AIRFLOW
(CFM)
4500
4800
5100
5700
6000
6300
6600
6900
7200
7500

AVAILABLE
0.4

0.2

STATIC PRESSURE
1.6
Watts
2964
3207
3470
4061
4391
4745
5122

Bhp
3.48
3.76
4.07
4,76
5.15
5.57
6.01

Rpm
1230
1248
1268
1312
1335
1359
......

STATIC PRESSURE
2.6
Watts
4456
4725
5016

Bhp
5,23
5.54
5.88

Rpm
1473
1488
......

(in. wg)
1.8
Watts
3250
3498
3767
4371
4707
5067

2.0

(in. wg)
2.8
Watts
4772
5046

Bhp
4.15
4.45
4,77
5,50
5.90
--

3.0
Bhp
5.98
--

Brake Horsepower
Factory-Installed Option
Input Watts to Motor

*Standard low-medium static drive range is 873 to 1021 rpm. Alternate high-static drive range is 1025 to 1200. Other rpms require a
field-supplied drive.
NOTES:
1. Maximum continuous bhp for the standard motor is 6.13, The
maximum continuous watts is 5180. Do not adjust motor rpm
such that motor maximum bhp and/or watts is exceeded at the
maximum operating cfm.

Table 18 -- Air Quantity Limits
UNIT
48HJ

MINIMUM
CFM

MAXIMUM
CFM

015
017

3600
4500

6,000
7,500

Table 19-

Evaporator Fan Motor Specifications

UNIT
48HJ

NOMINAL
Hp

VOLTAGE

MAX
WATTS

EFF.

MAX
BHP

MAX
BkW

MAX
AMPS

015

2.9
2.9
2.9
3

208
230
460
575

2700
2700
2700
3065

85.8%
85.8%
85.8%
81.7%

3.13
3.13
3.13
3.38

2.34
2.34
2.34
2.63

9.46
8.6
4.3
3.9

3.7
3.7
3.7
5
5
5
5

208
230
460
208
230
460
575

3610
3610
3610
5180
5180
5180
5180

85.8%
85.8%
85.8%
87.5%
87.5%
87.5%
87.5%

4.26
4.26
4.26
6.13
6.13
6.13
6.13

3.18
3.18
3.18
4.57
4.57
4.57
4.67

(Standard
Motor)
015
(Optional
Motor)
017

10.5
10.5
4.8
15.8
15.8
7.9
6.0

LEGEND
BHP -- Brake Horsepower

Table 20 -- Accessory/FlOP
UNIT 48HJ

EconoMiSerlV or EconoMiSer2 Static Pressure (in. wg)

UNIT VOLTAGE

CFM

ECONOMIZER
PRESSURE DROP

All

3,750
4,000
5,000
6,000
7,500

.03
.03
.06
.07
.10

015, 017

LEGEND
FlOP

Factory-Installed

NOTES:
1. The factory-assembled
fan performance.

2. The static pressure must be added to external static pressure.
The sum and the evaporator entering-air cfm should then be
used in conjunction with the Fan Performance table to determine
blower rpm, bhp, and watts.

Option

horizontal adapter substantially

Table 21 -- MoistureMi$er
UNIT SIZE
48HJ
015
017

improves

Dehumidification

UNIT NOMINAL
TONS
12
15

Package Static Pressure Drop (in. wg)
CFM PER TON
400
.045
.071

300
.026
.040

500
.071
.111

Table 22 -- Fan Rpm and Motor Pulley Settings*
48HJ (No. Turns Open)

1/2

11/2

21/2

31/2

41/2

51/2

015 (208/230, 460, 575 v)t
015 (208/230, 460 v)**
017t
017"*

1147
1315
tltl-

1124
1292
tt
tt

1101
1269
tt
tt

1078
1246
tt
tt

1055
1223
1021
1200

1032
1200
1002
1178

1010
1178
984
1156

987
1155
968
1134

964
1132
947
1112

941
1109
928
1091

918
1086
910
1069

895
1063
891
1047

tt
1040
873
1025

*Approximate fan rpm shown.
tlndicates standard drive package.
**Indicates alternate drive package.
1-tDue to belt and pulley style, pulley cannot be set to this number of turns open.

Operating

Sequence

because of the increase in fresh ail: the outdoor-air &tmper will
be proportionally closed. Damper position will follow file higher demand condition from DCV mode or free cooling mode.

COOLING,
UNITS WITHOUT
ECONOMIZER
-- When
thermostat calls for cooling, terminals G and YI me energized.
The indoor (evapolator) fan contactor (IFC), compressor contactor no. 1 (C l) and outdoor-fan contactor (OFC) me energized, and evaporator-fan motol: compressor no. 1, and both
condenser fans st_ul. The condenser-fan motors mn continuously while unit is cooling. If the thermostat c_dls for a second stage
of cooling by energizing Y2, complessor contactor no. 2 (C2) is
energized and compressor no. 2 stalls.
When the thermostat is satisfied, CI and C2 me deenergized and the compressors and outdoor (condenser) fan motors
(OFM) shut off. After a 30-second delay, the indoor (evaporator) fan motor (IFM) shuts off. If the therlnostat fan selector
switch is in the ON position, the evaporator-fan motor will run
continuously.
HEATING. UNITS WITHOUT
ECONOMIZER
-- When
the thermostat calls for heating, terminal WI is energized. In
order to prevent thermostat short-cycling, the unit is locked
into the Heating mode for at least 1 minute when WI is energized. The induced-draft motor (IDM) is then energized and
the burner ignition sequence begins. The indoor (evaporator)
fan motor (IFM) is energized 45 seconds after a flame is
ignited. On units equipped for two stages of heat, when additional heat is needed, W2 is enelgized and the high-fire solenoid on the main gas valve (MGV) is energized. When the
thermostat is satisfied and WI and W2 me deenergized, the
IFM stops after a 45-second time-off delay.
COOLING. UNITS WITH ECONOMISERIV
-- When
free
cooling is not available, the compressol_ will be controlled by
the zone thermostat.
When free cooling is available, the
outdoor-air &unper is modulated by the EconoMiSerlV control
to provide a 50 to 55 F supply-air temperatme into the zone. As
the supply-air temperature fluctuates above 55 or below 50 E
the dampers will be modulated (open or close) to bring the
supply-air temperature back within the set point limits.
For EconoMiSerlV
operation, there must be a thermostat
call for the fan (G). This will move the damper to its minimum
position during the occupied mode.

Dmnper movement from full closed to full open (or vice
versa) will take between I l/2 and 21/2 minutes.
If free cooling can be used as determined from the appropriate changeover command (switch, dry bulb, enthalpy curve,
differential dry bulb, or differential enthalpy), a call for cooling
(YI closes at the thermostat) will cause the control to modulate
the dmnpers open to maintain the supply air temperature set
point at 50 to 55 E
As the supply-air temperature drops below the set point
range of 50 to 55 F. the control will modulate the outdoor-air
&Lmpers closed to maintain the proper supply-air temperature.
HEATING. UNITS WITH ECONOMISERIV
-- When the
room thermostat c_dls for heat, the heating controls are energized as described in the Heating, Units Without Economizer
section. When the indoor fan is energized, the economizer
&Lmper moves to the minimum position. When the indoor fan
is off. the economizer dmnper is fully closed.
COOLING.
UNITS WITH ECONOMI$ER2,
PREMIERLINK TM CONTROL AND A THERMOSTAT
-- When free
cooling is not available, the compressors will be controlled by
file PremierLink control in response to the YI and Y2 inputs
from the thermostat.
The PremierLink control will use the following information
determine if flee cooling is available:
Indoor fan has been on for at least 30 seconds.
The SPT. SAT. and OAT inputs must have valid readings.
OAT must be less than 75 E
OAT must be less than SPT.
Enthalpy must be LOW (may be jumpered if an enthalpy
sensor not available).
• Economizer
position is NOT forced.
Pre-cooling occurs when the is no c_dl from the thermostat
except G Pie-cooling is defined as the economizer modulates
to provide 70 F supply all:
to
•
•
•
•
•

When free cooling is awtilable the PremierLink control will
control the compressors and economizer to provide a supplyair temperature determined to meet the YI and Y2 calls from
file thermostat using the following thlee routines. The three
control routines are based on OAT.

Above 50 F supply-air temperature, the dalnpers will modulate from 100% open to the minimum open position. From 50 F
to 45 F supply-air temperature,
the &tmpers will maintain
at the minimum open position. Below 45 F the &tmpers will
be completely shut. As the supply-air temperature rises, the
dampers will come back open to the minimum open position
once the supply-air temperature rises to 48 E

The 3 routines me based on OAT where:
SASP = Supply Air Set Point
DXCTLO = Direct Expansion

If optional power exhaust is inst_dled, as the outdoor-air
damper opens and closes, the power exhaust fan will be energized and deenergized.

PID = Proportional
Routine

If field-installed accessory CO 2 sensors are connected to the
EconoMiSerIV control, a demand controlled ventilation strategy will begin to operate. As the CO 2 level in the zone increases
above the CO 2 set point, the minimum position of the &tmper
will be increased proportionally. As the CO 2 level decreases

1 (OAT < DXCTLO)

YI energized
(SATLOI + 3).
Y2 energized
(SATLO2 + 3).

Cooling Lockout Set Point

Integral
economizer

maintains

SASP

economizer

maintains

SASP

Routine 2 (DXCTLO
•
•

•
•
•
•
•

•

•
•

Routine
•
•

< OAT < 68 F)

into the zone. The supply air will maintain the space temperature between the heating and cooling set points as indicated in
Fig. 45.

If only YI energized, the economizer
maintains a SASP
= (SATLOI + 3).
If SAT > SASP + 5 and economizer
position > 80%,
economizer will go to minimum position for 3 minutes or
until SAT > 68 E
First stage of mechanical cooling will be energized.
Integrator resets.
Economizer
opens again and controls to current SASP
after stage one on for 90 seconds.
With YI and Y2 energized
economizer
maintains
an
SASP = SATLO2 + 3.
If SAT > SASP + 5 and economizer
position >80%,
economizer will go to minimum position for 3 minutes or
until SAT > 68 E
If compressor
one is on then second stage of mechanical
cooling will be energized. Otherwise the first stage will
be energized.
Integrator resets.
Economizer
opens again and controls
to SASP after
stage one on for 90 seconds.

The PremierLink will integrate the compressors stages with
the economizer based on similtu logic as the three routines listed in the previous section. The SASP will float up and down
based on the error leduction c_dculations that compare space
temperature and space set point.
When outdoor-air temperature conditions require the economizer to close for a complessor stage-up sequence, the economizer control integrator is reset to zero after the stage-up sequence is completed. This prevents the supply-air temperature
from dropping too quickly and creating a freeze condition that
would make the compressor turn off prematurely.
The high space set point is used for DX (dilect expansion)
cooling control, while the economizer
space set point is a
calculated value between the heating and cooling set points.
The economizer set point will always be at least one degree
below the cooling set point, allowing for a smooth transition
from mechanical
cooling with economizer
assist, back to
economizer
cooling as the cooling set point is achieved.
The compressors
may be used for initial cooling then the
PremierLink controller will modulate the economizer using an
error reduction calculation to hold the space temperature
between the heating and cooling set points. See Fig. 45.

3 (OAT > 68)

Economizer
is opened 100%.
Compressors
1 and 2 are cycled based on YI and Y2
using minimum on and off times and watching the supply air temperature
as compared
to SATLOI
and
SATLO2 set points.

The controller uses the following
economizer cooling:

If optional power exhaust is installed, as the outdoor-air
damper opens and closes, the power exhaust fans will be energized and deenergizedi

•
•
•
•
•
•

If field-installed accessory CO 2 sensors are connected to the
PremierLink TM control, a PID-controlled
demand ventilation
strategy will begin to operate. As the CO 2 level in the zone
increases above the CO 2 set point, the minimum position of the
dmnper will be increased proportionally.
As the CO 2 level
decreases because of the increase in fresh all: the outdoor-air
dmnper will be proportionally closed.
HEATING. UNITS WITH ECONOMISER2,
PREMIERLINK
CONTROL AND A THERMOSTAT -- When the thermostat
calls for heating, terminal WI is energized. The PremierLink
control will move the economizer damper to the minimum
position if there is a qdl for G and closed if there is a call for
WI without G In order to prevent thermostat from short cycling, the unit is locked into the heating mode for at least
10 minutes when WI is energized. The induced-draft motor is
then energized and the burner ignition sequence begins.

conditions

to determine

Enthalpy is Low
SAT reading is available
OAT reading is available
SPT reading is available
OAT < SPT
Economizer Position is NOT forced

TEMPERATURE

t13

CONTROL

75,
744

734

nm 724

...... SET

POINT

71 4
I-

_TEMPERATURE

w 704
o

694
co

68 J
TIME

On units equipped for two stages of heat, when additional
heat is needed, W2 is energized and the high-fire solenoid on
the main gas valve (MGV) is energized. When the thermostat
is satisfied and WI is deenergized,
the IFM stops after a
45-second time-off delay unless G is still maintained.

NOTE: PremierLink control performs smart staging of 2 stages of DX
cooling and up to 3 stages of heat.
Fig. 44 --

COOLING.
UNITS WITH ECONOMISER2,
PREMIERLINK CONTROL
AND A ROOM SENSOR -- When free
cooling is not available, the compressors will be controlled by
the PremierLink controller using a PIE) Error reduction calculation as indicated by Fig 44.

DX Cooling
Temperature
Control
Example

TEMPERATURECONTROL

The PremierLink controller will use the following information to determine if free cooling is available:
• Indoor fan has been on for at least 30 seconds.
• The SPT. SAT. and OAT inputs must have valid readings.
• OAT must be less than 75 E
• OAT must be less than SPT.
• Enthalpy
must be LOW (may be jumpered
if and
enthalpy sensor is not available).
• Economizer
position is NOT forcedi

74
73

......... ....................................
F_COOLSETPO,NT

71 ]

ow ii

I--

TEMPERATURE

L___ HEAT SETPOINT
TIME

When fiee cooling is available, the outdoor-air damper is
positioned through the use of a Proportional
Integral (PID)
control process to provide a calculated supply-air temperature

Fig. 45 -- Economizer Temperature
Control Example
36

If any of the above conditions am not met, file economizer
submaster reference (ECSR) is set to maximum limit and the
damper moves to minimum position. The operating sequence
is complete. The ECSR is rectflculated every 30 seconds.

INDUCED
MOTOR

If field-installed
accessory CO 2 sensors are connected to
the PremierLink TM control, a PID-controlled
demand ventilation strategy will begin to operate. As the CO 2 level in the zone
increases above file CO 2 set point, the minimum position of the
damper will be increased proportionally.
As the CO 2 level
decreases because of the increase in flesh air. the outdoor-air
damper will be proportionally closed.
HEATING. UNIT WITH ECONOMISER2,
PREMIERLINK
CONTROL AND A ROOM SENSOR -- Every 40 seconds
the controller will calculate the required heat stages (maximum
of 3) to maintain supply air temperature (SAT) if the following
qufdifying conditions are met:
• Indoor fan has been on for fit least 30 seconds.
• COOL mode is not active.
• OCCUPIED,
TEMRCOMPENSATED
START or HEAT
mode is active.
• SAT reading is available.
• Fire shutdown mode is not active.

i tl

VIEW
PORT

CONTROL BOX
ACCESS PANEL

__.

ilO

/GCLT

o :275,2
FAN HOUSING

SECTION

COVER

VALVE

Fig. 46 -- Typical Gas Heating Section
CONDENSER
COILClean condenser coil annually and
as required by location and outdoor-air conditions. Inspect coil
monthly; clean as required.

If all of the above conditions are met, the number of heat
stages is cfdculated; otherwise file required number of heat
stages will be set to 0.

CONDENSATE
DRAINCheck and clean each year fit
start of cooling season. In wintek keep drains and traps dry.

If file PremierLink controller determines that heat stages are
required, the economizer &tmper will be moved to minimum
position if occupied and closed if unoccupied.

FILTERS -- Clean or replace fit stmt of each heating and cooling season, or more often if operating conditions require. Refer
to Table 1 for type and size.
OUTDOOR-AIR
INLET SCREENS -- Clean screens with
steam or hot water and a mild detergent. Do not use throwaway
filters in place of screens. See Table 1 for quantity and size.

Staging should be as follows:
If Heating HD STAGES=2
HEAT STAGES=I
HEAT STAGES=2

INTEGRATED GAS
UNIT CONTROLLER

•\ Ji77' _

If gin optional power exhaust is installed, as file outdoor-air
damper opens and closes, the power exhaust fans will be
energized and deenergizedi

•
•

DRAFT

(75% capacity) will energize HSI
(100% capacity) will energize HS2

MAIN BURNER -- At the beginning of each heating season,
inspect for deterioration or blockage due to corrosion or other
causes. Observe the main burner flalnes. Refer to Main Burners section on page 41.
FLUE GAS PASSAGEWAYS
-- The flue collector box and
heat exchanger cells may be inspected by removing heat exchanger access panel (Fig. 4), flue box cover, and main burner
assembly. Refer to Main Burners section on page 41 for burner
removal sequence. If cleaning is lequired, remove heat exchanger baffles and clean tubes with a wire brash.

In order to prevent short cycling, the unit is locked into the
Heating mode for fit least 10 minutes when HS 1 is deenergizedi
When HSI is energized the induced-di'aft
motor is then
energized and the burner ignition sequence begins. On units
equipped for two stages of heat, when additional heat is needed, HS2 is energized and the high-fire solenoid on the main gas
valve (MGV) is energized. When the space condition is satisfied and HSI is deenergized the IFM stops after a 45-second
time-off delay unless in the occupied mode. The fan will mn
continuously
in the occupied mode as required by national
energy and fresh air standards.

Use caution with ceramic heat exchanger baffles. When
installing retaining clip, be sure the center leg of the clip
extends inward toward baffle. See Fig. 47.

SERVICE

COMBUSTION-AIR
BLOWER -- Clean periodically to assure proper airflow and heating efficiency. Inspect blower
wheel every fall and periodicfdly during heating season. For the
first heating season, inspect blower wheel bi-monthly to determine proper cleaning frequency.

Before performing service or maintenance operations on
unit, turn off main power switch to unit and install lockout
tag on disconnect switch. Electrical shock could cause persomd injury.

To inspect blower wheel, remove heat exchanger access
panel. Shine a flashlight into opening to inspect wheel. If cleaning is required, remove motor and wheel assembly by removing screws holding motor mounting plate to top of combustion
fan housing. The motor and wheel assembly will slide up and
out of the fan housing. Remove the blower wheel from the
motor shaft and clean with a detergent or solvent. Replace
motor and wheel assembly.

CleaningInspect unit interior at beginning of each
heating and cooling season and as operating conditions require
(see Fig. 46). Remove unit top panel and/or side panels for access to unit interioc
EVAPORATOR COIL -- Clean as required with commercifd
coil cleanel:

CONDENSER
AND
EVAPORATOR-FAN
MOTOR
BEARINGS
-- The condenser-fan and evaporator-fan motors
have permanently
sealed bearings, so no field lubrication is
necessaq.

CERAMIC
BAFFLE

Evaporator
Fan
Performance
Adjustment
(Fig. 48-50) -- Fan motor pulleys are factol7 set for speed
shown in Table I.

CLIP_

To change fan speeds:
I.

Shut off unit power supply.

Size 015 only: Ix_osen belt by loosening cmriage nuts
holding motor mount assembly to fan scroll side
plmes (A and B).

Size 017 only: Loosen nuts on the 2 cmriage bolts in
the mounting base. [nstall jacking bolt find plate
under motor base (bolt fred plate are shipped in
instfdler's packet). Using bolt and plate, raise motor
to top of slide and remove belt. Secure motor in this
position by tightening the nuts on the carriage bolts.

/
HEAT EXCHANGER
TUBES

NOTE: One baffle and clip will be in each upper tube of the heat
exchanger.

Fig. 47 -- Removing Heat Exchanger Ceramic
Baffles and Clips

Loosen movable-pulley

flange setscrew (see Fig. 48).

Lubrication
COMPRESSORSEach compressor
is charged with the
correct amount of oil fit the factory. Conventional
white oil
(Sontex 200LT) is used. White oil is compatible with 3GS oil,
and 3GS oil may be used if the addition of oil is required. See
compressor
nmneplate for ongimd oil chmge. A complete
recharge should be four ounces less than file original oil charge
When a compressor is exchanged in the field it is possible that
a major portion of the oil from the replaced compressor may
still be in file system. While this will not affect the reliability of
the replacement compressok the extra oil will add rotor drag
and increase power usage. To remove this excess oil, fin access
vfdve may be added to the lower portion of the suction line at
the inlet of the compressol: The compressor should then be run
for 10 minutes, shut down and the access valve opened until no
oil flows. This should be repeated twice to make sure the proper oil level has been achieved.

STRAIGHTEDGE
WITH BELT

PULLEY

ENSURE PROPER
CLEARANCE
BETWEEN
BELT(S) AND FAN

MOVABLE
FLANGES

PULLEY

FAN SHAFT BEARINGS
-- For size 015 units, bearings me
permanently
lubricated. No field lubrication is required. For
size 017 units, lubricate bearings fit least every 6 months with
suitable bearing grease. Extended grease line is provided for far
side fan bearing (opposite drive side). Typical lubricants me
given below:

Texaco
Mobil
MANUFACTURER
Sunoco
Texaco

MUST

MOTOR AND FAN
SHAFTS MUST BE
PARALLEL
SETSCREWS_

FIXED FLANGES

SINGLE-GROOVE

Regal AFB-2*
Mobilplex EP No. 1
LUBRICANT
Prestige 42
Multifak 2

Fig. 48 -- Evaporator-Fan Alignment and
Adjustment

*Preferred lubricant because it contains rust and oxidation inhibitors.

Screw movable flange toward fixed flange to increase
speed and away from fixed flange to decrease speed.
Increasing fan speed increases load on motol: Do not
exceed maximum speed specified in Table 1.

9.
10.

Set movable flange at nemest keyway of pulley hub and
tighten setscrew. (See Table 1 for speed change for each
full turn of pulley flange.)

Replace and tighten belts (see Belt Tension Adjustment
section on page 40).

1. Remove the evaporator-fan
control access panel.

Slide fan pulley along fan shaft.
Make angular
mounting pkite.

Evaporator
48HJ015

alignment

Fan Service

UNITS

loosening

and

motor

Remove the center post (located between the evaporator
fan and heating control access panels) and all screws securing it.

Ix)osen nuts on the 2 cmriage bolts in the motor mounting
base.

Using jacking bolt under motor base, raise motor to top of
slide and remove belt. Secure motor in this position by
tightening the nuts on the carriage bolts.
Remove the belt drive.

Remove jacking bolt and tapped jacking bolt pkite.

Remove the 2 screws that secure
plate to the motor support channel.

Remove the 3 screws from the end of the motor support
channel that interfere with the motor slide path.

Slide out the motor and motor mounting

flom

Replacement

(See Fig. 49)

NOTE: To remove belts only, follow Steps 1-6.
1. Remove filter and supply-air

section panels.

Remove unit top panel.

Loosen caniage nuts A and B holding
assembly to fan scroll side plates.
Loosen screw C.

4.
5.
6.

motor

mount

Rotate motor mount assembly (with motor attached)
far as possible away from evaporator coil.
Remove belt.

Rotate motor mount assembly
toward evaporator coil.

Remove motor mounting
MOTOR

access panel and the heating

1. Loosen fan pulley setscrews.
3.

to reinstall motol:

48HJ017 UNITS (See Fig. 50) -- The 48HJ017 units use a
fan motor mounting system that features a slide-out motor
mounting pkite. To replace or service the motor, slide out the
bracket.

To align fan and motor pulleys:
2.

Reverse above procedure

11. Check and adjust belt tension as necessary.

See Table 18 for air quantity limits.
5.

Lift motor up through top of unit.

10.

Disconnect wiring connections
ing bolts.
11. Remove the motol:

back past original position

12.

the motor mounting

pkite.

and remove the 4 mount-

To install the new motol; reverse Steps 1-11.

nuts D and E (both sides).
FAN PU

UNIT1-OPPANEL

POLLEY
O p,
MOTOR '_'_MOTO

R MOUNT

MOTOR

PULLEY

SLIDING MOTOR
MOTOR _

PLATE
MOTOR
PLATE

PULLEY

FAN SCROLL
SIDE PLATES
MOTOR SUPPORT
CHANNEL

NOTE: A 31/2-in. bolt
installer's packet. They
channel below the motor
The plate part number
3/8 - 16 x 1_/4-in. LG.

Fig. 50-

DRAIN
CONNECTION

Fig. 49 -- 48HJ015 Evaporator-Fan
Motor Adjustment
39

JACKING

BOLT

and threaded plate are included in the
should be added to the motor support
mounting plate to aid in raising the motor.
is 50DP503842. The adjustment bolt is

48HJ017 Evaporator-Fan
Motor Section

Belt Tension

Adjustment

Ix_osen fan motor bolts.

a. Size 015 Units:

To adjust belt tension:

chCut is below line, calefully recover some of the charge. Recheck suction pressme as charge is adjusted.
NOTE: Indoor-air cfm must be within normal operating range
of unit. All outdoor fans must be operating.

Move motor mounting plate up or down for propel
belt tension (1/2 in. deflection with one finger).
b.

The TXV (thermostatic expansion valve) is set to maintain
between 15 and 20 degrees of superheat at the compressors.
The valves are factory set and should not requile le-adjustment.

Size 017 Units:
Turn motor jacking bolt to move motor mounting
plate up or down for proper belt tension (3/8 in.
deflection at midspan with one finger [9 lb forcel).

Tighten nuts.

Adjust bolts and nut on mounting
fixed position.

Condenser-Fan
48HJ015

plate to secure motor in

Adjustment

AND 017 UNITS

(Fig. 51)

Shut off unit power supply.

2.
3.

Remove access panel(s) closest to the fan to be adjusted.
Ix_osen fan hub setscrews.

Adjust fan height on shaft using a straightedge
across the fan oliI]ce.

Tighten setscrews

Turn on unit powel:
,

MOISTUREMISER
TM SYSTEM
CHARGING
-- The system charge for units with the MoistureMiSer
option is greater
than that of the standard unit ¢flone. The chtuge for units with
this option is indicated on the unit nameplate diawing. To
chtuge systems using the MoistureMiSer
dehumidification
package, fully evacuate, recovel; and re-chtuge the system to
the muneplate specified charge level. To check or adjust refrigerant charge on systems using the MoistureMiSer
dehumidification package, chtu'ge per the stan&rd subcooling chtuts. The
subcooler MUST be deenergized to use the chtuging charts.
The chtuts reference a liquid pressure (psig) and temperatme at
a point between the condenser coil and the subcooler coil. A
tap is provided on the unit to measure liquid pressure entering
the subcooler (leaving the condenser).

placed
Gas

and replace panel(s).

Adjustment

Valve

NATURAL GAS--The
response to file thermostat

closes

factory setting is stamped

on the valve body

To adjust regulator:
I. Set thermostat at setting for no c_fllfor heat.
2. Turn main gas valve to OFF position.
3. Remove I/s-in. pipe plug from manifold or gas valve
pressure tap connection.
Install a suitable p_essuremeasuring device.
4. Set main gas valve to ON position.
5. Set thermostat at setting to cMl for heat.
6. Remove screw cap covering regulator adjustment screw
(See Fig. 53).
7. Turn adjustment screw clockwise to increase pressure or
counterclockwise
to decrease pressure.
8. Once desired pressure is established, set thermostat setting for no call for heat, turn off main gas valve, remove
pressure-measuring
device, and replace I/s-in. pipe plug
and screw cap.

NOTE: Dimension is in inches.
Condenser
Fan Adjustment,
48HJ015 and 017

Power

Failure
-- Danpers have a spring return. In event
of power
ftfihre,
dampers
will return to fully closed
position until power is restored. Do not manuall)" ol)erate
damper motor

Refrigerant

Charge -- Amount of refrigerant ch_u'ge is
listed on unit nameplate and in Table I. Refer to Carrier GTAC
II; Module 5; Ch_uging, Recovery, Recycling, and Reclamation
section for charging methods and procedures. Unit panels must
be in place when unit is operating during charging procedure.
NOTE: Do not use recycled refrigerant
taminants.

and

When power is supplied to valve temfimfls DI and C2, the
main v_flve opens to its preset position.

........

The regular
(3.3 in. wg).

Fig. 51 i

gas valve opens
or limit control.

BOTH CIRCUITS
ALL OUTDOOR FANS MUST BE OPERATING
140,

as it may contain con-

NO CHARGE
-- Use standard evacuating techniques. After
evacuating system, weigh in the specified amount of refrigerant (refer to Table l ).

m120

'Ab[_dH_R'G'E'I_AB'O_/__U@'E
>

LOW CHARGE
COOLING
-- Using cooling charging ch_ut
(see Fig. 52), add or remove refrigerant until conditions of the
chart are met. Note that charging chart is different from those
normally used. An accurate pressure gage and tempemtmesensing device is required. Charging is accomplished by ensuring the proper alnount of liquid subcooling. Measure liquid line
pressure at the liquid line service valve using pressure gage.
Connect temperature sensing device to the liquid line near the
liquid line service valve and insulate it so that outdoor ambient
temperature does not affect reading.
TO USE THE COOLING CHARGING
CHART -- Use the
above temperature and pressure readings, and find the intersection point on the cooling charging chart. If intel_ection point on
chart is above line, add refrigerant.
If intersection point on

IIII

O 100

I IIII

IIIII

I I

IIIIIIIIIIIIIIIIIIIII

11111111111111111112
01111
11111
IIIIIII/I I

IIIIIIIIIIIII/11111
I I I I I I I I I IJ/']

E'DG&&
CHIARGE

IF BELOW CURVE

IIII II/I III
C_

IIII! 11 III

100

150

200

250

300

350

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Fig. 52 -- Cooling
4O

Charging

Chart

400

Compressor
Lockout -- If any of the safeties (high-pmssum,
low-pmssum, fmeze protection thermostat, compressor internal
therlllostat) trip, or if them is loss of power to the compressors,
the cooling lockout (CLO) will lock the compressors off. To
reset, manually move the thermostat setting.
EVAPORATOR
FAN MOTOR PROTECTION
-- On size
015 units, an internal protector with auto-reset is included in the
indoor fan motor as a protection against overcurrent.

/ADJUSTMENT
SCREW
(REMOVE
COVER)

REGULATOR

Fig. 53 --

Gas Valve

Main Burners

-- For all applications, m;fin burners
facto U set and should require no adjustment.
MAIN BURNER REMOVAL
1. Shut off (field-supplied)

On size 017 units, a manual reset, calibrated trip, magnetic
circuit bmaker protects against overcurrent. Do not bypass connections or increase the size of the bmaker to cormct trouble.
Determine the cause and cormct it befom resetting the breakel:
CONDENSER-FAN
MOTOR
PROTECTION
-- Each
condenser-fan
motor
is
internally
protected
against
overtemperatum.
HIGH-PRESSURE
AND LOW-PRESSURE
SWITCHES
-If either switch trips, or if the compressor overtemperature
switch activates, that refrigerant circuit will be automatically
locked out by the CLO. To reset, manually move the thermostat setting.
FREEZE PROTECTION
THERMOSTAT
(FPT) -- An FPT
is located on the top and bottom of the evaporator coil. They
detect frost build-up and turn off the compressol; allowing the
coil to clem: Once the frost has melted, the compressor can be
reenergized by resetting the compressor lockout.

are

manual main gas v_dve.

Slmt off power to unit.

Remove unit control box access panel, burner
access panel, and center post (Fig. 4).

Disconnect

5.
6.

Remove wires from gas valve.
Remove wires from rollout switch.

Remove

sensor wire and ignitor cable from [GC board.

Remove

2 screws securing manifold

Remove 2 screws that hold the burner
flange to the vestibule plate.

section

gas piping from gas valve inlet.

bracket to basepan.
support

Relief Devices

-- All units have relief devices to protect
against damage from excessive pressures (i.e., tim). These
devices protect the high and low side.

plate

10. Lift burner assembly out of unit.
CLEANING
AND ADJUSTMENT
1. Remove burner
Burner Removal

Control Circuit, 24-V

rock from unit as described
section above.

Inspect burners, and if dirty, remove burners fiom rack.

Using a soft brush, clean burners
requimd.

4.
5.
6.

Adjust spark gap. See Fig. 54.
Reinst_dl burners on rack.
Reinstall burner rock as described

-- This control circuit is protected against overcurmnt by a 3.2 mnp circuit breakel: Bmaker
can be reset. If it trips, determine cause of trouble befom resetting. See Fig. 55 and 56.

in Main

and crossover

Replacement Parts

port as

parts may
request.

Diagnostic

Overcurmnt
protection.

compressor

has internal

line break

bom'd

Two internal access doors am provided inside the filter/
diive access door. The filter access door (on the left) is secured
by 2 small 1/4 turn latches with folding bail-type handles. This
door must be opened prior to opening the drive access dool:
The drive access door is shipped with 2 sheet metal scmws
holding the door closed. Upon initial opening of the dool: these
scmws may be removed and discarded. The door is then held
shut by the filter access dool: which closes over it.

energize the crankcase heaters for 24 hours befom starting
IMPORTANT:
shutdown or servicing,
the
compmssors. After prolonged
compressor
excessively

IGC

Four external hinged access doors am provided. All external
dool_ me provided with 2 large 1/4 turn latches with folding
bail-type handles. (Compmssor access doors have one latch.) A
single door is provided for filter and drive access. One door is
provided for control box access. The control box access door is
interlocked with the non-fused disconnect which must be in the
OFF position to open the door Two doors tue provided for
access to the compressor compartment.

motor

Crankcase
Heater
-- The 48HJ units am equipped
with a
70-wati crankcase
heater to prevent absorption
of liquid refi'igerant by oil in the crankcase
when the compressor
is idle. The
crankcase
heater is energized
whenever
them is main power to
the unit and the compressor
is not energized.

Overtemperature
-Each
protector to protect it against
temperatures.

The

Refer to Troubleshooting

Hinged Access Doors -- When the optional
service package is ordemd or the if the hinged access doors
option is ordemd, the unit will be provided with external and
internal hinged access doors to facilitate service.

PROTECTION
Each

LEDs--

purposes.

Optional

Devices

COMPRESSOR

-- A complete list of replacement
from any Carrier distributor upon

IGC Control

has LEDs for diagnostic
section on page 45.

above.

Filter Drier -- Replace whenever refiigerant system is exposed to atmosphere.
Protective

be obtained

has an internal
high discharge gas

SEE
I
"C"

I
Io

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48HJD015

I
I

,@ @

I
I

48HJD017 AND 48HJ F015

oLZ.)o

o0o

o(: 3o

I
I

48HJF017

SPARK GAP .120" TO .140"

DETAIL "C"

Fig. 54 -- Spark Gap Adjustment

@ •

SCHEMATIC
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Source Exif Data:
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Page Count : 54
Page Layout : SinglePage
Page Mode : UseNone
Producer : Goby Monitor Application version 3, 2, 1, 4
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CARRIER Package Units(both Units Combined) Manual L0606340

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