CARRIER Package Units(both Units Combined) Manual L0605138

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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Installation
NOTE: Read
installation.

the entire

instruction

manual

before

NOTE: Installer: Make sure the Owner's
Manual
Instructions
are left with the unit after installation.

starting

TABLE

and

the

OF CONTENTS
Page
2
2
2-16

.................................

2

Identify Unit ...................................
Inspect Shipment ................................
Provide Unit Support
..............................
Roof Curb .....................................
Slab Mount ....................................
Ground Mount
.................................

2
2
2
2
2
2

Provide

Clearances

................................

2

Rig and Place Unit ................................
Inspection
.....................................
Introduction
....................................

7
7
7

Use of Rigging Bracket ...........................
Select and Install Duc_vork
..........................

7
9

Converting

Horizontal

Discharge

A05307

Units to Downflow

(Vertical) Discharge Units .........................
Provide for Condensate Disposal
.....................
Install Electrical Connections
.......................
High- Voltage Connections

9
9
11

.......................

11

Routing Power Leads Into Unit ....................
Connecting
Ground Lead to Ground Screw
Routing Control Wires ..........................
Accessory Installation
...........................
Special Procedures
for 208-v Operation
PRE-START-UP
..................................
START-UP
.......................................

..........

.............

Unit Start-Up
................................
Sequence of Operation
............................

Checking and Adjusting Refrigerant
Refrigerant
Charge
.............................

Charge

..........

No Charge ....................................
Low Charge Cooling ............................
To Use Cooling Charging (;harts ...................
Indoor Airflow and Airflow Adjustments
Defrost Control ..................................
Quiet Shift ....................................
Defrost
......................................
Heat/Cool

Mode

........................

............

.....

Fig. 1 - Unit 50CR
MAINTENANCE
...............................
Air Filter .......................................
Indoor

16
16
17
17

Electrical Controls and Wiring
......................
Refrigerant
Circuit ................................
Indoor Airflow
..................................

20
20
20
22
22
22
22
22
22
22
22
22
22

Outdoor
Outdoor

Blower

and Motor

24-28
25

11
11
11

17-23
20

Check for Refrigerant Leaks ........................
Start-Up Adjustments
.............................
Checking Cooling and Heating Control Operation

Emergency

Instructions

Service

SAFETY CONSIDERATIONS
........................
INTRODUCTION
..................................
RECEIVING
AND INSTALLATION
................
Check Equipment

to the Expertg

..........................

25

(;oil, Indoor Coil, and Condensate
Fan ....................................

Metering Devices-TXV
& AccuRater
Pressure Switches
................................
Loss-of-Charge

Switch

Drain Pan

Piston

....

26
26
26
..........

26
26

...........................

27

High-Pressure
Switch .............................
Copeland Scroll Compressor
(Puron (_:Refrigerant)

27
27

.......

Refrigerant
System ...............................
Refrigerant
...................................
Compressor
Oil ................................

27
27
27

Servicing Systems on Roofs with Synthetic
Liquid-Line
Filter Drier .........................
Puron (R-410A)
System Information

Refrigerant Charging
...............................

Loss-of-Charge
Switch
.........................
Check Defrost Thermostat
........................
TROUBLESHOOTING
.............................
START-UP
CHECKLIST
...........................

25
25

Materials

..............

...

27
28
28
28
28
28
28
28

SAFETY
CONSIDERATIONS
Installation
and
servicing
ofthisequipment
canbehazardous
dueto
mechanical
andelectrical
components.
Onlytrained
andqualified
personnel
should
install,
repair,
orservice
thisequipment.
Untrained
personnel
canperform
basic
maintenance
functions
such
ascleaning
andreplacing
airfilters.
All other
operations
must
be
performed
bytrained
service
personnel.
When
working
onthis
equipment,
observe
precautions
intheliterature,
ontags,
andon
labels
attached
to or shipped
withtheunitandothersafety
precautions
thatmayapply.
Follow
allsafety
codes.
Installation
mustbeincompliance
with
localandnational
building
codes.
Wear
safety
glasses,
protective
clothing,
andworkgloves.
Have
fireextinguisher
available.
Read
these
instructions
thoroughly
andfollowallwarnings
orcautions
included
inliterature
andattached
totheunit.
Recognize
safety
information.
Thisisthesafety-alert
symbol
Z_X
When you see this symbol on the unit and in instructions
be alert to the potential

for personal

or manuals.

injury.

injury or death. WARNING

signifies

hazards which

could result in personal injury or death. CAUTION
is used to
identify unsafe practices which may result in minor personal injury
or product
and property
damage. NOTE is used to highlight
suggestions
operation.

which will result in enhanced

Step 1--Check
IDENTIFY

installation,

reliability,

or

AND INSTALLATION

Equipnmnt

UNIT

The unit model number and serial number are printed on the unit
informative plate. Check this information
against shipping papers.
INSPECT

SHIPMENT

Inspect for shipping damage while unit is still on shipping pallet. If
unit appears to be damaged or is torn loose from its anchorage, have
it examined by transportation
inspectors before removal. Folavard
claim papers directly to transportation
company.
Manufacturer
is
not responsible
for any damage incurred in transit. Check all items
against shipping list. Immediately
Conditioning
office if any item

notify the nearest Carrier Air
is missing. To prevent loss or

damage,

packages

leave all parts in original

Step 2--Provide
For hurricane
Certificate
ROOF

Understand
these signal words:
DANGER.
WARNING,
and
CAUTION.
These words are used with the safety-alert
symbol.
DANGER
identifies the most serious hazards which will result in
severe personal

RECEIVING

until installation.

Unit Support
tie downs,

(Professional

contact

distributor

Engineering)

for details

and PE

if required.

CURB

Install accessory

roof curb in accordance

with instructions

with curb (See Fig. 2). Install insulation, cant strips,
flashing. Ductwork must be attached to curb.
IMPORTANT:

The gasketing
applied

and

of the unit to the roof curb is critical

for a water tight seal. Install gasketing
roof curb. Improperly

shipped

roofing,

gasketing

material

supplied

with the

also can result in air leaks

and poor unit performance.
Curb should be level to within 1/4 in. (See Fig. 3). This is necessa U
for unit drain to function properly. Refer to accessory
roof curb
installation instructions for additional information
as required.

ELECTRICAL

SHOCK

SLAB

HAZARD

Failure to follow this warning
or death.

could result in personal

injury

Before installing or servicing system, always turn off main
power to system.
There may be more than one disconnect
switch. Turn off accessory heater power switch if applicable.

MOUNT

Place the unit on a solid, level concrete
in. thick with 2 in. above grade.
approximately

2 in. beyond

pad that is a minimum of 4
The slab should
extend

the casing on all 4 sides of the unit (See

Fig. 4). Do not secure the unit to the slab except when required
local codes.
GROUND

MOUNT

The unit may be installed

either on a slab or placed

directly

ground if local codes permit. Place the unit on level ground
with gravel for condensate
discharge.
EQUIPMENT

DAMAGE

Failure to follow
damage.

Step 3--Provide

HAZARD

this caution

may result

in unit component

Puron (R-410A)
systems operate at higher pressures than
standard
R-22
systems.
DO NOT
use R-22
service
equipment
or components
on Puron (R-410A)
equipnmnt.
Ensure service equipment is rated for Puron (R-410A).

by

on the

prepared

Clearances

The required minimum
Adequate
ventilation

service clearances are shown in Fig.6 and 7.
and outdoor
air must be provided.
The

outdoor fan draws air through the outdoor coil and discharges it
through the top fan grille. Be sure that the fan discharge does not
recirculate to the outdoor coil. Do not locate the unit in either a
corner or under an overhead obstruction.
The minimum clearance
under a partial overhang (such as a normal house overhang) is 48 in.
above the unit top. The maximum horizontal extension of a partial
overhang must not exceed 48 in.
IMPORTANT:

INTRODUCTION

Do not restrict outdoor

either the outdoor-air
The 50CR heat pump
outdoor
installation.
horizontal-discharge
ground-level
(vertical)

is fully self-contained
and designed for
Standard
units
are
shipped
in
a
configuration
for
installation
on
a

slab. Standard

discharge

units can be converted

configurations

for rooftop

to downflow

applications.

to compressor

airflow. An air restriction

inlet or the fan discharge

at

may be detrimental

life.

Do not place the unit where water, ice. or snow from an overhang
or roof will damage or flood the unit. Do not install the unit on
carpeting
or other combustible
materials.
Slab-mounted
units
should be at least 4 in. above the highest expected water and runoff
levels. Do not use unit if it has been under water.

base_
/

/

/

/

[[[

.......

Screw _
@
(NOTE A)
_§

Fla slur,

I

:';allg_

"_

_

WOOd nailer*_

u0p, ______41K ilFdbRooz urb.

[

It:i:::tl _ Insulation(field

Roofing
/

II

m_,

\

II vs!:!tl II _

\

__Jtl

H

Roof

supphed)

II.

field supplied

Curb

for Small

Ductwork
field supplied]

Cabinet

Roof

Note A: When unit mounting screw is used,
retainer bracket must also be used.

Curb for Large Cabinet

Note A: When unit mounting screw is used,
retainer bracket must also be used.

\/
/\

R/A

S/A

_Gasket
E

D

Insulated
deck pan

Sho_
Suppod
deck paq

around_
duct

Gasket around
outer edge \

Long
Suppod

'N\\
=.

Retlm opening
(BXC)

A05308

UNIT

ODS CATALOG
NUMBER

B
IN. (aM)

CPRFCURB006A00

8 (203)

11 (279)

16-1/2

(419)

28-3/4

(730)

30-3/8

(771)

44-5/16

(1126)

45-15/16

CPRFCURB007A00

14 (356)

11 (279)

16-1/2

(419)

28-3/4

(730)

30-3/8

(771)

44-5/16

(1126)

45-15/16

CPRFCURB008A00

8 (203)

16-3/16

(411)

17-3/8

(441)

40-1/4

(1022)

41-15/16

(1065)

44-7/16

(1129)

46 - 1/16

(1169)

CPRFCURB009A00

14 (356)

16-3/16

(411)

17-3/8

(441)

40-1/4

(1022)

41-15/16

(1065)

44-7/16

(1129)

46-1/16

(1169)

be used

as well.

SIZE

500R024-036
500R042-060

D
IN. (MM)

C
IN. (MM)

E
IN. (MM)

G

A
IN. (aM)

F
IN. (MM)

IN.(aM)
(1167)
(1167)

NOTES:
curb

must be set lip for unit

1.

Roof

2.

Seal

3.

Dimension

4.

Roof

curb

5.

Table

lists only

6.

Attach

ductwork

7.

Insulated

8.

Dimensions

9.

When

strip

unit

conditions.

nlust

be applied,

being

as required,

installed.
to unit

being

installed.

in ( ) are in millimeters.
is made

pmlels:

of 16

gauge

the dimensions,
to curb

steel.
per part

(flmlges

I in. thick

nmnber,

of duct

fiberglass

that have

changed.

rest on curb).

1 lb. density.

are in inches.
mounting
This

screw

bracket

is used (see

is available

Note

throt_gh

A). a retainer

bracket

must

This

bracket

Mierometl.

Fig. 2 - Roof

Curb

Dimensions

must

also be used

when

required

by

code

for hurricane

or seismic

MAXIMUM ALLOWABLE
DIFFERENCE (in.)
A-B

B-C

A-C

1/4

1/4

1/4
C99065

Fig. 3 - Unit Leveling

Tolerances

I
EVAR COIL

COND. COIL
C99096

Fig. 4 - Slab Mounting

Detail

1

2

Y

Z

3

X

A06114

Fig. 5 - Corner
CORNER WEIGHTS
Unit
Total Weight
Corner Weight 1
Corner Weight 2
Corner Weight 3
Corner Weight 4

Weights

(SMALL CABINET)

(Lbs.)
CORNER WEIGHTS (LARGE CABINET)

036

Unit

373

Total Weight
Corner Weight 1

024
349

030
349

70
54

70
54

58

84
141

84
141

90

Corner Weight 2
Corner Weight 3

150

Corner Weight 4

75
"uO
oo

042
438

048
463

O6O
499

88
68

98
61

1O7
7O

106
177

127
177

136
186

ELECTRICAL
C_ARACTERiSTiCS

UNil

i
§480
[33R]

t

5OSROR4

208

024
050
406 5
16001

I 60

5OCBORO

ROS/RRO 1 60,

2081230

R 60

5BCR038

208/230

ZOS/230

R 60

DONNER WEGT
A
B

SUPPLY

230

UNiT WT

70/3
70 3

7

l

60

5

84138

54/D4

5

84/38

NEIGBT

i

CENTER OF GRAVIIY

MNIIN

349

1158

3

9911i3902)

I

§OBO[£OO]

4S9B[193i

1

447

349
373

ilRS 3
i169R

991113902i
%419i4/02]

i
i

5OBO[ROO]
508 01200]

4S90[195i
R556[140i

i
i

4470[i_6]
RR02{iSO]

O[iT6]

REQUIRED CLEARANCES TO DOMBU$_BLE MAlL

LBS /_G
C

54/24

UNIT

s
' 14!/64
il4

/64

MiiLiMETPRS
[iNi
3566
[i4OO}
50 8 iROOi
3566
[_4OO}
12 7 (050]
9i44
[3600}

lOP O_ UNIT ......................
DUCT SIDE O? U_iT .............
S_SE OPPOSITE SUCTS ........................
BOTTOM OF UNIT .....................
ELECiRIC HEAl PANEL ......................

0
0

NED. REQ_RED CLEARANCES.
056

513

2_iRB/26

3

MiLLiMETDRS [i_]
10668
[4200_
9140
[3800i

BETWEEN UNTIE, POWER ENIRY SiBE
..............
UNIT AND UNGROSNSDD SURPACBS, POWER ENTRY SIDE .....
UNII AND BLOCK OR CONCNDTE WALLS AND OTHER
GROUNSES SURFACES, POWER ENTRY SIDE .............
REQUIRED CLEARANCE FOR OF'_ATION

10668

MiLLiMETERS [i_i
9140
[3600]
9i40
[3600}

EVAP DOll
ASCBSS SiDE .......................
PO_ER ENIRY SISE
.......
(EXCEPT FOR NED RDOUIREMENTS)
UNIt
TOP
..........
S;SE OPPOSITE SUETS ......................
DUCT PANDL

t

[4E00i

AND SERVICING

9!40
[3600}
9140
[3600}
304 8 [i2
00]=

=_INiMU_ D[SIA_CESziP
U_iT _S PLACEO LESS INAN 304 8 [12 00i PROM WALL
SYSTDM,TNE_
STETS# PERFORMANCE MAYSE COMPROMISES

TOP VIEW

BI_4ENSIONS iN []

ARE IN INSBES

11938
_T98

6
63144]

I
FUL

OUViR

e

22 R [0 88] BIA
HOLE
CONTROL ENTRf_

7

5703
[2245

ST62

[10

i

t87]

ll7 7

-

!

[iEB5i
8310
[B2 72i

LEFT SIDE VIEW

i

!

:t

I

42 T
87/
{3 43}

3266

!

IR4T
issoi

1_ 681

BRAN
EI
/96[0
75] N P T
X R2 060 8T
D P

i•

"SUPeL_
BUCT
j
OPENING j,
i

i
4020
[IV 8Si

2

l-

"''"'_--"

\

£O_PRESSOR SLOWER, ELECTRIC
& ELECTRICAL ACCESS PANEL

RDAT

L_:LID`

50
[0201

4 I_L'"/
898
_
[3 63]

L

8496
[9 83]

_

650

6

[21

67]

i
_

649 6
[9¸83)

[4 S11
1226 3
148 28]

RIGHT SIDE VIEW

FRONT VIEW

REAR VIEW

AO5299

Fig.6 - 50CR024-036

Unit Dimensions

_-

i

355 8
114 01]

i

208 230 ] 60, 808/230 3 60
208 230 _ 60, E08/230 3 60

50CR0_8
50CRO_O

RETURN

I

CORNER _E GiT

88/39
A

_Jg£T
J_
WT

ELECIRICAL
CHARACTER_S_ICS

UNIT
50CR042

9i68/30 8

_i1

208230160,

208/230 3 60

UNII HEGHI

'2 I'k ,i,, ,.° ,, ,,,

OF GRAVITY

MMIiN

ol,o,o,,o
ol., o.,,,

REQUIRED CLEARANCES TO COMBUSTIBLE NATL

LBS /1(6

8 ] 106/40
C

ii_77/80O

2

TOP OF _NI/
DUCT SIO[ Or 8_iT
................
SiDE OPPOSIT[
DUCTS........................
_01TOM OF _NiT ................................
ELEC/RIC _EAT PANEL

127157

_ 177/80

]

I_EC. REQ_RfD

611277

CENER

M/LL/M[iERS
[IN)
355 _ i_4 00!
5O 8 12 00}
355_
1i4001
127
1050}
9_
4 136 00/

EI.EARANEEE.

_EY_EEN 8N/iS.
PO_ER EN/RY SiSE
UNIT ANO UNGROUNDEDSURFACES< ?O_ER ENTRY S_E
UNiT _0
BLOC_ OR CONCRETE _LLS
AND OTHER
GRBUNDE_ $_RFACES
POWfR ENTRY SiDE .............
REQUIRED CL_RANCE

....

_iNI_UM

TOP VIEW

/066

8

14_00}

FUR OPI_RATItll AND S[!tVI_NG
_ILtI_ETERS
[iNI
914¸0
13600i
914 0 _36 00/

EVAP COIL ACCESS S/bE .........................
POW[R ENTRY SIOE
(EXCEPT £OR NEC REOUIREMENTS)
UNiT TOP ....................................
SiDE OPPOSITE _UCTS
.............
DUC/ PANEL

t

MILLIMETERS IiNi
1066 8 _42 00_
014 0 130 00/

914¸0
914¸0
30_8

136001
13600}
lie
00/1

01STANCES:IF
UNIT IS PLACED LESS TH_N 304_
[1200]
_RO_ _ALL
SYSTE_.IHEN
SESTEM PERFORMANCE MAYBE COM?RO_ISED

OIMENSiONS iN

I0907
142 941

[1AR£

iN {NCRES

[4700]
FIELD ENTRY_
SERVICE PORTS

\

44 3
\
\

FULl¸lOUVER

i

[I 74i

I

1193
t

•
F_LL LO_VE_
A

•

rgLi

LOUVER
L_m__

•
445

[I 75] OIA
_o--a
PO_ER ENIRY

070 2
i8442]

4070
I_EBU}
31

I)_CT

_---87

COMPRESSOR, _LOWER, ELECTRIC BEAT
& EIESTRICAL ACCESS PANE{

12263
1_8281

......................

FRONTVIEW

RIGHTSIDE VIEW

3"

!_-347
5
[13 68]
_

{13831

_,4

,

E
[343]

_35_2
................................

LEFT SIDE VIEW

_

\

_35/2
{13

REAR VIEW

A05300

Fig. 7 - 50CR042-060

Unit l)imensions

837

Step 4--Rig

and Place

Rigging

and handling

reasons
etc.).

clue to the installation

Only

of this equipment

can be hazardous

location

(roofs,

for many

elevated

Field Installation

BRACKET

of Ri_in_

Bracket

structures,
1. If applicable, remove unit from shipping carton. Leave top
shipping skid on the unit for use as a spreader bar to prevent

trained,

should

USE OF RIGGING

Unit

qualified

handle

crane operators

and ground

support

staff

the rigging straps from damaging the unit. If the skid is not
available, use a spreader bar of sufficient length to protect the
unit from damage.

and install this equipment.

When working with this equipment,
observe precautions
in the
literature, on tags, stickers, and labels attached to the equipment, and
any other safety precautions

2. Remove

4 screws in unit corner posts.

that might apply.
3. Attach each of the 4 nmtal rigging

Training for operators of the lifting equipment
not be limited to. the following:

should

include,

1. Application
of the lifter to the load. and adjustment
lifts to adapt to various sizes or kinds of loads.
2. Instruction

in any special operation

3. Condition

all applicable

temperature,

safety

codes.

brackets

rain lip (See Fig. 8). Use the screws removed
to secure the brackets to the unit.

under

the panel

in step 2 above

of the

or precaution.

of the load as it relates to operation

kit, such as balance,
Follow
gloves.

but

of the lifting

etc.

Wear safety

shoes

and work

PROPERTY

HAZARD

Failure to follow
this warning
injury/death
or property damage.
Rigging
adequate

INSPECTION

DAMAGE

bracket
lifting.

MUST

could

be under

the

result
rain

in personal

lip to provide

Prior to initial use, and at monthly intervals, all rigging brackets and
straps should be visually inspected
for any damage, evidence of
wear. structural deformation,
or cracks. Particular attention should
be paid to excessive wear at hoist hooking points and load support
areas. Brackets or straps showing any kind of wear in these areas
must not be used and should be discarded.

PROPERTY
Failure

DAMAGE

to follow

injury/death

HAZARD

this warning

or property

could

result

in personal

damage.

Do not strip screws when re-securing
the unit. If a screw is
stripped, replace the stripped one with a larger diameter screw
ELECTRICAL

SHOCK

(included).

HAZARD

Failure to follow this warning
or death.

could result in personal

injury

of Unit

1. Bend top of brackets

Before installing or servicing system, always turn off main
power to system.
There may be more than one disconnect
switch. Turn off accessory heater power switch if applicable.
Tag disconnect

Ri_,_in_/Liftin_

switch with a suitable

warning

label.

the corner
2. Attach
opposite

down approximately

30 degrees from

posts.
straps of equal length to the rigging brackets
at
ends of the unit. Be sure straps are rated to hold the

weight of the unit (See Fig. 9).
3. Attach a clevis of sufficient strength in the middle of the
straps. Adjust the clevis location to ensure unit is lifted level
with the ground.

UNIT FALLING

HAZARD

Failure to follow this warning
or death.
Never stand beneath

rigged

could result in personal

injury

4. After unit is securely in place detach rigging straps. Remove
corner posts, screws, and rigging brackets then reinstall
screws.

units or lift over people.

INTRODUCTION
UNIT
The lifting/rigging
bracket is engineered
installed only on Small Packaged Products.
used to rig/lift a Small
elevated structures.

PROPERTY

DAMAGE

Packaged

Product

FALLING

and designed
to be
This bracket is to be

Failure

onto

injury/death

roofs

or other

to follow

HAZARD
this warning

or property

could

When straps are taut, the clevis should
inches above the unit top cover.

could

result

in

personal

Rigging brackets
for one unit use only, When removing
unit at the end of its useful life, use a new set of brackets.

in personal

be a minimum

of 36

After the unit is placed on the roof curb or mounting pad. remove
the top crating. On 50CR060 units only, 2 wire ties fastened to the
outdoor coils and reversing valve/accumulator
assembly must be

HAZARD

Failure to follow
this warning
injury/death or property damage.

result

damage.

a

cut. Remove
access wire

the left and front louvered panels and corner post to
ties. The wire tie to be cut on the left is located

approximately
4 in. down the tube sheet. The wire tie to be cut on
the right is located approximately
6 in. down the tube sheet.

n

DETAIL A
C03017

Fig. 8 - Rigging Bracket Under Unit Rain Lip

MINIMUM HEIGHT: 36

UNIT HEIGHT

SEE DETAIL

A06113

MAXIMUM
UNIT SIZE

SHIPPING

WEIGHT

Lb

Kg

500R024

372

169

500R030

372

169

500R036

395

179

500R042

462

210

500R048

485

22O

50CR060

521

236

Fig. 9 - Suggested

Rigging

Step5--Select
andInstallDuctwork

CONVERTING

The design and installation of the duct system must be in accordance
with the standards of the NFPA for installation
of non-residence
type

air conditioning

residence

and

ventilating

systems,

type. NFPA 90B and/or local codes

Select and size ductwork,

supply-air

registers,

NFPA

90A

HORIZONTAL

DOWNFLOW

(VERTICAL)

DISCHARGE

DISCHARGE

UNITS

TO

UNITS

or

and ordinances.
and return air grilles

ELECTRICAL

SHOCK

HAZARD

according
to
ASHRAE
(American
Society
of
Heating,
Refrigeration.
and Air Conditioning
Engineers) recommendations.

Failure to follow this warning
or death.

The unit has duct flanges on the supplythe side of the unit.

Before installing or servicing system, always turn off main
power to system.
There may be more than one disconnect

and return - air openings

on

switch.Turn

ELECTRICAL

OPERATION

Failure to follow this warning
or death.

off accessory

could result in personal

injury

NOTE: These panels
electrical knockout.
3. Use a screwdriver
bottom
4. Ensure

Step 6--Provide
ductwork,

consider

Recommended
2. Avoid

abrupt

change

sizes for filters are shown
duct size increases

in duct size adversely

IMPORTANT:

Use flexible

unit to prevent

transmission

NOTE:

the following:

1. All units should have field-supplied
filters or accessory
rack
installed
in the return-air
side
of the

filter
unit.

in Table 1.

and reductions.

Abrupt

affects air performance.

connectors

between

of vibration.

ductwork

Use suitable

and install lockout tag before

and

gaskets

to

ensure weather tight and airtight seal. When electric heat is installed,

Ensure

are held in place

and hammer

of the composite

to remove

are in place

to an

the panels

in the

to block

off the

Disposal

that condensate-water

The units dispose of condensate

tabs similar

(See Fig. 11).

for Condensate

with local codes, restrictions,

with

return and supply

unit base.

the side duct covers
air openings

injury

switch if applicable.

2. Remove side duct covers to access bottom
knockouts.

horizontal

and installing

heater power

1. Open all electrical disconnects
starting any service work.

HAZARD

For vertical supply and return units, tools or parts could drop
into ductwork, therefore, install a 90 degree turn in the return
ductwork between the unit and the conditioned
space. If a 90
degree elbow cannot be installed, then a grille of sufficient
strength and density should be installed to prevent objects
from falling into the conditioned
space. Units with electric
heaters require 90 degree elbow in supply duct.

When designing

could result in personal

disposal

methods

comply

and practices.
through

a 3/4 in. NPT female fitting

that exits on the compressor
end of the unit. Condensate water can
be drained directly onto the roof in rooftop installations
(where
permitted)
or onto a gravel apron in ground level installations.
Install a field-supplied
condensate
trap at end of condensate
connection to ensure proper drainage. Make sure that the outlet of
the trap is at least 1 in. lower than the drain-pan
condensate
connection to prevent the pan from overflowing.
Prime the trap with

use fireproof canvas (or similar heat resistant material) connector
between ductwork and unit discharge connection.
If flexible duct is
used. insert a sheet metal sleeve inside duct. Heat resistant duct

water. When using a gravel apron, make sure it slopes away from the
unit.

connector (or sheet metal sleeve)
heater element.

the unit, install a field-supplied
2-in. trap at the condensate
connection to ensure proper drainage. Condensate
trap is available

3. Size ductwork
4. Seal, insulate,
insulate
through
Air

must extend

for max cooling
and weatherproof

24-in.

from electric

air quantity

(400 cfm/ton).

all external

ductwork.

Seal,

and cover with a vapor barrier all ductwork passing
conditioned
spaces. Follow latest Sheet Metal and

Conditioning

Contractors

National

Association

(SMACNA)
and Air Conditioning
Contractors Association
(ACCA)
minimum
installation
standards
for residential
heating and air conditioning
systems.
5. Secure all ducts to building

structure.

Flash, weatherproof,

and vibration-isolate
duct openings
in
according to good construction
practices.

wall

or

roof

If the installation

requires draining

the condensate

water away from

as an accessory or is field-supplied.
Make sure that the outlet of the
trap is at least 1 in. lower than the unit drain-pan
condensate
connection to prevent the pan from overflowing.
Connect a drain
trough using a minimum
of field-supplied
3/4 -in. PVC or
field-supplied
3/4 -in. copper pipe at outlet end of the 2 -in. trap
(See Fig. 12). Do not undersize the tube. Pitch the drain trough
downward at a slope of at least i in. for every 10 ft. of horizontal run.
Be sure to check the drain trough for leaks. Prime
beginning
of the cooling season start-up.

the trap at the

n

Table

1--Physical

Data - Unit 50CR

UNIT SIZE

024

030

036

042

048

NOMINAL CAPACITY (ton)
OPERATING WEIGHT (lb.)
Compressor
Refrigerant (R-410A) Quantity (lb.)
REFRIGERANT
METERING DEVICE

2

2-1/2

3

3-1/2

4

5

350

350

373

440

463

499

7.5

8

9.5

t0.8

11.5

14.0

Scroll

TXV

ORIFICE OD (in.)
OUTDOOR

060

0.035

(2)

0.035

(2)

0.038

(2)

0.038

0.088

(2)

(Left

0.046

0,042 (Left OD Coil)
0.052 (Right OD Coil)

OD Coil)

(Right

OD Coit)

COIL
2...21

2...21

2...21

2...21

2...21

2...21

Face Area (sq. ft,)
OUTDOOR FAN

12.3

12.3

13.6

15.4

17.2

19.4

Nominal Cfm
Diameter

27O0

27OO

280O

28O0

3300

3300

22

22

22

22

22

Rows...Fins/in,

Motor HP (RPM)
INDOOR COIL

I/8

(825)

3...15

Rows...Fins/in,
Face Area (sq. ft,)
INDOOR BLOWER

1/8

(825)

I/8

3...15

3.7

(825)

I/8

(825)

I/4

22

(1100)

I/4

(1100)

4...15

3...15

4...15

4...17

3.7

4.7

4.7

5.7

3.7

Nominal Airflow (Cfm)
Comfort

Variable

Efficiency
Max
Size (in,)
Motor HP (RPM)
HIGH-PRESSURE
SWITCH (psig)
Cutout
Reset (Auto)
LOSS-OF-CHARGE/LOW-PRESSURE
(Liquid

based

on Comfort

Roll

back

(see

User

Interface

instructions

for

more

information).

700

875

1050

1225

1400

800

1000

1200

1400

1600

2000

10xt0

10x10

tlx10

1tx10

1tx10

1tx10

1/2

t/2

3/4

3/4

3/4
650

-+ 15

420

-+25

1750

1

SWITCH

Line) (psig)
Cutout

20-+

5

45-+

10

Reset (Auto)

_Required

Return-Air Filters (in.)*
20x24x1
20x24x1
24x30x1
24x36x1
24x36x1
24x36x1
Throwaway
filter sizes shown are based on the larger of tile ARI Air Conditioning and Refrigeration Institute) rated cooling airflow or the heating airflow velocity of 300 ftiminute

for throwaway

type

or 450

ft/'mimee

for high

capacity

type.

Air filter

pressure

drop

for non

standard

filters

must

not exceed

0.og

in. wg.

USER
INTERFACE

TOP COVER

DISCONNECT
PER NEC*
_FROM
GASLINE

*NEC

- NATIONAL

ELECTRICAL

CODE

A06091

Fig. 10 - Typical

Installation

10

UNIT

COMPONENT

DAMAGE

Failure to follow this caution
being installed.
i. Make

all electrical

ANSI/NFPA
governing
connections

2. Use

connections

Electrical

only

copper

Covers

and/or

On

t

ROUTING

phase

Trap

SHOCK

POWER

HAZARD

Connect

could result in personal

wiring

injury

LEADS

GROUND

the ground

ROUTING

The unit
including

Interface

instruction

POWER

a

separate

electrical

service

with

for wire sizing

The field-supplied

disconnect

high-voltage

(See Table 2 for electrical

may be mounted

Instructions
connections.
Operation

provided

with

of unit on improper

may cause unit damage

the

accessory

a

data).

on the unit over the

line voltage

may be
Service

for electrical

constitutes

service

abuse

WIRES

on the low voltage

connections

to the User

guide.

transformer
supplies 24-v power for complete system
accessory electrical heater. A fuse is provided in the 24-v
(See Fig. 19); see the caution label on
is factory wired for 230-v operation.

If supply voltage is 208-v, rewire transformer primary
in Special Procedures for 208-v Operation section.

inlet hole (See Fig. 6 and 7).

If the unit has an electric heater, a second disconnect
required.
Consult
the Installation,
Start-Up,
and

screw in the

low-voltage
hole provided into unit (See Fig. 6 and 7). Connect user
interface leads to unit control power leads as shown in Fig. 14.

field-supplied,
waterproof disconnect switch mounted at, or within
sight from the unit. Refer to the unit rating plate, NEC and local
codes for maximum
fuse/circuit
breaker size and minimum circuit
amps (ampacity)

SCREW

Form a drip-loop with the control leads before routing them into the
unit. Route the low voltage control leads through grommeted,

CONNECTIONS
have

TO GROUND

(UI), refer to the UI installation

circuit on the control board
the transformer. Transformer

must

LEAD

lead to the chassis using the ground

CONTROL

Protection Association
(latest edition) (in Canada, Canadian
Electrical Code CSA C22.1) and local electrical codes.

unit

INTO UNIT

splice box (See Fig. 14 and 17).

For detailed

The

``vires.

entry side panel. See Fig. 6 and 7 for location and size. For
single-phase
units, connect leads to the black and yellow ,,vires ; for
3 -phase units, connect the leads to the black, yellow, and blue wires.

The unit cabinet must have an uninterrupted,
unbroken
electrical ground to minimize the possibility of personal injury
if an electrical fault should occur. This ground may consist of
an electrical wire connected to the unit ground screw in the
control
compartment,
or conduit
approved
for electrical
ground when installed in accordance with NEC, ANSI/NFPA
American
National
Standards
Institute/National
Fire

HIGH-VOLTAGE

power to unit is within operating

conduit termination
at the duct panel must be watertight. Run the
high-voltage
leads through the power entry knockout on the power

Connections

Failure to follow this warning
or death.

between

and unit. DO

imbalance.

as high-voltage

CONNECTING
ELECTRICAL

switch

Use only copper wire between
disconnect
and unit. The high
voltage leads should be in a conduit until they enter the duct panel;

cg9013

Electrical

for connections

disconnect
WIRE.

5. Do not damage internal components when drilling through
any panel to mount electrical hard``vare, conduit, etc.

MIN,

Step 7--Instan

local

4. Insulate low-voltage
``vires for highest voltage contained
within conduit when lo``v-voltage control ``vires are in same
conduit

Fig, 12 - Condensate

with NEC

voltage range indicated on unit rating plate. On 3-phase
units, ensure phases are balanced within 2 percent. Consult
local power company for correction
of improper voltage
A05301

1" (25mm)

in accordance

diagram.

conductor

3. Be sure that high-voltage

Fig. 11 - 50CR with Duct Covers

to the unit

Code Part i and applicable

Refer to unit wiring

field-supplied
electrical
NOT USE ALUMINUM

Ducl

may result in damage

(latest edition) and local electrical codes
such
wiring.
In Canada.
all electrical
must be in accordance
with CSA standard

('22. i Canadian
codes.

HAZARD

and

that could affect warranty.
11

as described

Table

V-PH-HZ
UNIT

2--Electrlcal

Data--50CR

ELECTRIC

VO LTAG E

RANGE

SIZE

COMPRESSOR

MIN

MAX

RLA

LRA

t87

253

13.5

61 .O

OFM

IFM

FLA

FLA

NOMINAL

208/230-1-60

0.9

4.3

208/230-1-80

187

253

15.9

73.0

253

18.9

83.0

0.9

4.3

0.9

8.8

036

187

253

12.2

77.0

50/50

5,4/7,2

26.0/30.0

54.8/59.6

60/60

7.5/10,O

36.1/41.7

67,2/74.2

70/80

25.1/25.1

30/30

18.1/20.8

47.8/51.1

50/60

5.4/7.2

28.0/30.0

57,6/82.6

60/70

7.5/10.0

38.1/41.7

70.2/77.2

80/80

29.5/29.5

35/35

18.1/20,8

52,1/55.6

60/60

5.4/7.2

28.0/30.0

82,0/87.0

70/70

7.5/10.0

36.1/41.7

74.7/81.6

80/90

11.3/15.0

54.2/62.5

97.2/107.7

100/110

3,8/5

1.8

6.8

208/230-1-60

253

22.4

t05.0

0.9

6.8

042

30/30

38.7/38.7

45/45

7,5/1 O,O

20.8/24.1

49,7/53.7

50/60

11.3/15.0

31.3/36.1

82.7/88.8

70/70

35.7/35.7

253

15.4

88.0

0.9

8.8

45/45

187

253

21.3

109.0

1.6

8.8

048

58,3/81.7

70/70

5.4/7.2

28.0/30.0

88.2/73.2

80/80

7.5/10.0

36.1/4t

80.8/87.8

11.3/15.0

90/90

54.2J82.5

108,4/118.8

110/125

15.0/20.0

72.2/83.3

128.0/139.9

150/150

27.0/27.0

35/35

10.4/12,0

40,0/42.0

50/50

7,2/10.0

20.8/24.1

53.0/57.0

80/60

tl.3/15,0

31.3/36.1

66.0/72.1

70/80

15.0/20.0

41.6/48.0

78,9/86.9

80/90

35.0/35.0

45/45

187

253

14.7

91.0

1.6

8.8

187

253

26,9

145.0

1.5

9.t

060

57.6/61.1

70/70

5.4/7.2

28.0/30.0

87.5/72.5

80/80

7,5/10.0

36.1/41.7

80.2/87.1

90/90

11.3/15.0

54.2J82.5

102.7/118.2

110/125

15.0/20.0

72.2/83.3

125.3/139.2

150/150

28.8/26.8

35/35

187

253

17.6

123.0

1.5

9.1

12

-/-

3.8/5.0

10.4/12.0

89.8/41.8

50/50

7,5/10.0

20.8/24.1

52.8/56.8

80/60

tl.3/15.0

31.3/36.1

65.9/71.9

70/80

15.0/20.0

41.8/48.0

78.7/86.7

80/90

44.2/44.2

80/60

-/-

3,8/5,0

18.1/20.8

68.8/70.3

5.4/7.2

28.0/30.0

78.7/81.7

90/1 O0

80/90

89.4/96.3

100/110

7,5/10.0

38.1/41.7

tl.3/15.0

54.2J82.5

ttl.9/122.4

t25/125

15.0/20.0

72.2/83.3

184.5/148.4

150/150

34.8/34.6

40/40

-/-

208/230-3-80

-/18.1/20.8

-/-

208/230-1-60

-/-

.7

3,8/5,0

-/-

208/230-3-60

-/18.1/20,8

-/-

208/230-1-60

-/-

3.8/5.o

3.8/5.o
187

-/-

23.7/23.7

-/-

208/230-3-60

-/-

10.4/12,0

3,8/5,0

-/-

t87

-/-

MOCP
30/30

-/208/230-3-80

MCA

44.8/48.1

3.8/5
187

FLA

22,1/22.1

-/-

208/230-1-60

POWER

18.1/20.8

3.8/5

-/030

POINT

SUPPLY

kW*
-/-

024

SINGLE

HEAT

-/-

3,8/5,0

10.4/12,0

47.6/49.6

60/60

7,5/10.0

20.8/24.1

60.7/84.7

70/70

11.3/15.0

31.3/38.1

73.7/79.7

t 5, 0/20.0

41.6/48.0

86.6/94.6

80/80
90/1 O0

EXAMPLE: Supply voltage is 230-3-60.
A B C
AB = 228 v
FLA
-LRA
-MCA
-MOCP -RLA
--

Full Load Amps
Locked Rotor Amps
MinimumCircuitAmps
Maximum Overcurrent
Rated Load Amps

LEGEND

AC = 227 v

,, @US
Lw

Average Voltage = 228 + 231 + 227
3
BC = 231 v
= 68._6
g

Protection

= 229

NOTES:
Determine
maximum
(AB) 229- 228 =
(BC) 231 - 229 =
(AC) 229- 227 =
Maximum
deviation

1. In compliance with NEC (National Electrical Code) requirements
for multimotor and combination load equipment (refer to NEC
Articles 430 and 440, the overcurrent protective device for the
unt sha be Power Supply fuse. The CGA (Canadian Gas
Association) units may be fuse or circuit breakeE
2. Minimum wire size is based on 60 C copper wire. Ifother than
60 Cwire
is used, or if length exceeds wire length in table,
determine size from NEC.
3. 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 percentage of voltage imbalance

percent

% Voltage

Imbalance

deviation
v
v
v
2 v.

from

average

voltage.

of voltage

imbalance
2
= 100 x -229

= 0.8%
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.

% Voltage imbalance
= 100 x max voltage deviation from average voltage
average voltage
.

Determine

1
2
2
is

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

Heater capacity (kW) based on heater voltage of 208v & 240v.
If power distibution voltage to unit varies from rated heater
voltage, heater kW will vary accordingly.
C03014

Fig. 13 - Electrical

User Interface

Infinity

Data Legend

Control

Board

:
Outdoor

Air Therrnisto[
(if used)

m

m

m

Humidifier
(Optional)

N
LEGEND
Field Control-Voltage

Wiring
A05302

Fig. 14 - Control

Voltage

Wiring

13

Connections

II

UN!T COMPO_£N_ ARRANGEMENT

............ LEGEND

IZ3
Fq

k_S

D

} > SW!TCH

SETTINGS

PR[SS_£ES_]gC_

_VS

_lXrSl_

WlVU

,o_s

co.,r_ss_, orr m_,
2 SEE_RIC_P_GESro_ USE_ I_TE_E

r_
G
_E_!ZED

SEO_CE

_

S_BSAS[S

_,r,os, _,

,e,,,_,e

,o,,_,

,, _r ,s cosr_

C_D _TUZ_

G
_E EN_RGJZ_

! 50CR500007

] 7.0
A05304

Fig. 15 - Wiring

SchematicsISOCR

14

Single

Phase

II
BkN --

COSTROL BOARD

_, ............LEGEND
)viDooii_41_COmPONEnT ARRANGEMENT

--*

FIEL_ pO_R _RING

_o_P

_O_ESSO__o_o_

_P

l_IO0 /AN _0 0

E_

w

G
G
E_ERGIZ_D _E E_ER_IZ_O

CLOSES
_AT

1
O_E_

150CR500005
]5.0
A05259

Fig. 16 - Wiring

Schematics-50CR

15

Three

Phase

GROUND
SCREW
(INSPLICE
BOX)

INSTALLATION

A. Accessory

Electric

GROUND
LEAD

ACCESSORY

SINGLE-PHASE
CONNECTIONS
TO DISCONNECT
PER NEC

L1 ......

3-PHASE
CONNECTIONS

L3

factory-approved

-- _BLK--

NOTE:

L2

Heaters

Electric heaters may be installed in 50CR
with
electric
heater
package.
See

-

-

-

-- _BLU--

Units

factory-supplied
opening.
This
condensation.

_YEL--

B. Outdoor

NOTE: Use copper wire only.
LEGEND
NEC - National Electrical Code
- - Field Wiring
_,_
Splice Connections

electric

per instructions supplied
unit
rating
plate
for

heater kits.

installed

without

electric

heat

Air Thermistor

While

the installation

using the Infinity control

have

a

over heater
of exterior

(OAT)

A 2-screw terminal strip is provided for connection
temperature
thermistor. This strip is marked OAT.
NOTE:

should

sheet metal block-off
plate installed
reduces
air leakage
and formation

of an outdoor

of an outdoor

temperature

sensor

OAT terminals

is optional,

certain

board

C99057

Fig. 17 - Line Power

Infinity features (ComfortHeat,

Connections

control)

electric heat lockout,

auto humidity

will be lost.

OAT input is used to supply outdoor temperature
data for system
level functions and for temperature
display on User Interface.
Using two ,,vires of field-supplied
lead of thermistor
to one screw
remaining

screw terminal:

strongly recommended
thermistor to eliminate

thermostat wire cable, wire one
terminal
and the other lead to

there is no polarity

to be observed.

It is

that two ,,vires be used to connect the
noise interference
in temperature
reading. If

there are not two spare ,,vires available in cable, one wire may be
used to connect thermistor to OAT screw terminal 1 and the other
lead of the thermistor can be wired to 24-vac COM (C) wire. OAT
screw terminal 1 is terminal located closest to the ABCD system
communications
and is marked with a small number 1 next to the
terminal

strip.

NOTE: Mis-wiring
OAT inputs will not cause damage to either
Infinity control or thermistor. If the thermistor is wired incorrectly,
no

reading

correctly
C.

will

appear

for normal

Humidifier

The Infinity

at User

Interface.

Re-wire

thermistor

operation.

Connections

control

board

terminal

marked

HUM

is provided

for

low voltage (24-vac)
control of a humidifier.
No humidistat
is
required
as User Interface
monitors
indoor
humidity.
When
commanded
to operate humidifier, the unit control will energize the
HUM output to turn humidifier on and de-energize
HUM output
turn humidifier
off. Wire HUM and C terminals
directly
humidifier as shown in Fig. 14.
SPECIAL

Be sure unit disconnect

AO530S

Fig. 18 - Control

Plate

Disconnect
wiring

The low-voltage

circuit is fused by a board-mounted

automotive

Connect
200-v.

fuse placed in series with transformer
SEC1 and R circuit. The C
circuit of transformer circuit is referenced to chassis ground through
a printed circuit run at SEC2 and metal control board mounting
eyelets. Check to be sure control
both factory-installed
screws.

board

is mounted

PROCEDURES

securely

using

16

FOR 208-V

to
to

OPERATION

switch is open.

the yellow primary

lead

from the transformer.

See unit

label. (See Fig. 15, 16 and 18)
the yellow primary

lead to the transformer

terminal

labeled

3. Make the following

SEO-2

a. Inspect for shipping
and handling
damages,
such
broken lines, loose parts, disconnected
wires, etc.

o

SEO-1

inspections:

b. Inspect for oil at all refrigerant

tubing

connections

as

and on

unit base. Detecting oil generally indicates a refrigerant
leak. Leak test all refrigerant tubing connections
using
electronic leak detector,
or liquid-soap
solution.
If a

m

}

refrigerant
Refrigerant

leak is detected,
Leaks section.

see following

Check

for

c. Inspect all field- and factory-wiring
connections.
sure that connections
are completed
and tight.
d. Ensure

wires do not touch

refrigerant

tubing

Be

or sharp

sheet metal edges.
e. Inspect
coil fins.
handling, carefully

:=

4. Verify the following

o

If damaged
during
shipping
straighten fins with a fin comb.

and

conditions:

a. Make sure that outdoor

fan blade is correctly

positioned

in fan orifice (See Fig. 24).
b. Make sure that condensate
drain pan and trap are filled
with water to ensure proper drainage.
c. Make sure that all tools
have been removed.

and miscellaneous

loose

parts

o
5. Compressors
A03169

Fig. 19 - Detail

of Printed

Circuit

or remove

Board

are internally
compressor

spring

holddown

mounted.

6. Each unit system has two Schrader-type
PRE-

START-

Schrader
high-side
discharge

UP

Do not loosen

bolts.
ports, one low-side

fitting located
on the suction line, and one
Schrader
fitting located
on the compressor
line. Be sure that caps on the ports are tight.
START-UP

FIRE,

EXPLOSION,

ELECTRICAL

SHOCK

Step 1--Unit

HAZARD

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

injury

1. Follow recognized
safety practices and wear protective
goggles when checking or servicing refrigerant system.
2. Do not operate compressor
or provide any electric power
to unit unless
secured.
3. Do not
electrical

compressor

remove
sources

ternainal

cover

is in place

compressor
terminal
cover
are disconnected
and tagged.

4. Relieve and recover all refrigerant
from system
touching
or disturbing
anything
inside terminal
refrigerant leak is suspected
5. Never
attempt
to repair

proceed as follows:
a. Shut off electrical

all

under pressure.
wear protective
power

before
box if

The amber LED located at bottom center of control adjacent to
motor harness plug is Motor Status LED and it is labeled MOTOR.

System

goggles

tubing with
from unit.

and

system
tubing

at the end of this book

right

center

of control

to inspect and prepare the unit for initial start- up:

and

of short flashes indicates

first digit of code.

of long flashes

second

flashes

indicates

is 0.25 seconds.

last short flash

Start-Up

digit of code.

on. A long flash is i second on.

and first long flash

6. The LED will be off for 2.5 seconds
B. Control

all access panels.

on

2. The number

5. The time between
second.

Checklist

shipped

in upper

1. The number

4. The time between

proceed as follows

CAUTION.

located

3. A short flash is 0.25 seconds

Use the Start-Up

2. Read and follow instructions

LED

system communications
status. Status Codes will be displayed
the STATUS LED using the following
protocol:

unsweat remaining
tubing stubs when
Oil can ignite when exposed to torch

supplied

amber

adjacent to System Communications
connector
(A,B,C,D)
is the
System Status LED and it is labeled STATUS. The green LED
labeled COMM is also located adjacent to System Communications
connector,
below STATUS LED, and is used as an indicator of

to unit and install lockout

c. Cut component
connecting
cutter and remove component

1. Remove

at the system user interface
in text with basic troubleshooting
instructions.
Careful use of information
displayed will reduce the
need for extensive manual troubleshooting.

A second

tag.
b. Relieve and reclaim all refrigerant from
using both high- and low-pressure
ports.

d. Carefully
necessary.
flame.

LEDs built into Infinity " control board provide installer or service
person information
concerning
operation and/or fault condition of
the unit control and ECM motor. This information
is also available

around compressor
terminals.
soldered
connection
while

refrigerant system is under pressure.
6. Do not use torch to remove any component.
contains oil and refrigerant
7. To remove a component,

A. LED Description:

and

until

Start-Up

NOTE: Always check high- and low-voltage
supply to the unit
components.
Check the integrity of the plug receptacle connections
and unit wiring harness prior to assuming a component
failure.

and

System

before

repeating

is 1

code.

Communications

Troubleshooting:
on all DANGER,

and INFORMATION

labels

WARNING,
attached

On power up, green COMM

to, or

system communications

with unit.
17

LED will be turned off until successful

are established

(this should

happen within

n

2. Recheck

10 seconds).
Once conmmnications
with User Interface
are
successful, COMM LED will be lit and held on. At the same time,
amber

STATUS

LED will be lit and held continuously

request for operating mode is received.
on any time unit is in idle mode.

The STATUS

on until a

are not

successful

proper time period

motor

faults

The unit control

D. Using

and status

The
high- and low-voltage

2. Checkfuseoncontrolboardtobe

LED does not light within

proper time period

Iffuse

in this product

WINDING

consists

of two parts:

STATUS

2. Remove

motor control

could result in personal

injury

3. Failing

section
module

and unpainted

any of these

LED will be turned

has failed internal
procedure

off.

control

start-up

motor

entire

and unplug

end should

ECM

motor

module

FAULT

tests and must be replaced.

OUTPUT

SENSED

"ON"

detects a 24-vac

WHEN

of a 24-vac

signal on either heater stage output
Status (;ode 37 will be displayed on
will turn off output and command

To find the fault:
1. Stop all system operations

winding

stage 24-vac

must

at User Interface

and check heater

outputs.

2. Disconnect
electric heater at power and check heater wiring
for faults. See Status (;ode 36 for more information.

exceed

be

The

CODE 44. MOTOR

MOTOR

communication
control

TEST

blower motor to supply an airflow determined to be safe for current
operation mode with electric heaters energized.

module:

to be sure it is functional.
section

BOARD

will correct.

and it is not supplying signal,
STATUS LED. Unit control

STATUS
tests,

4. Passing all of the tests, motor
replaced.
TURNS

motor

to provide
unit
operation
and
When the motor is commanded
to

CODE 45, CONTROL

If unit control

replaced.

MOTOR

to

Unit control is provided with circuitry to detect presence
signal on electric heater stage 1 and stage 2 outputs.

plug. Motor shaft should turn freely, resistance between any
two motor leads should be similar and resistance between
any motor lead
100,000 ohms.

connected

STATUS CODE 37, HEATER
NOT ENERGIZED:

HAZARD

to replace a motor

motor winding

is

highest priority Status (;ode to be flashed. All existing faults, as well
as a fault history, can be viewed at User Interface.

After disconnecting
power from the ECM motor, wait at least
5 minutes before removing
the control section. Internal
capacitors require time to discharge.

1. Check

blower

for

highest priority code will be displayed on STATUS LED. Clearing
the indicated fault when multiple faults exist will cause the next

SECTION

Failure to follow this warning
or death.

Before proceeding

the

wait

provided below. Codes are listed in order of their priority, highest
to lowest. Though multiple faults can exist at any time, only the

the

No other service

SHOCK

and

Unit faults indicated
by flashing codes on the amber system
STATUS LED can be resolved using troubleshooting
information

Unit control

ELECTRICAL

down

E. Unit Troubleshooting

LED information
aids and follow troubleshooting
steps described
below before replacing
motor control module or entire motor.
Motor control module is available as a replacement
part.
MOTOR

itself

Troubleshooting.

control module and the motor winding section. Do not assunre
motor or module is defective if it will not start. Use the designed-in

VERIFY

as

The unit

STATUS LED for the Status (;ode. Refer to the troubleshooting
instructions
for the indicated
Status Code in Section
E, Unit

C. ECM Motor Troubleshooting
used

motor

If the MOTOR LED is lit, flashing, and the motor does not run, or
if the MOTOR LED is off and the motor is running, check the

or shorting
of the ABCD
will
not
allow
successful

fuse to open.

motor

for airflow.

If the MOTOR LED is lit, flashing, and the motor is running, or if
the MOTOR
LED is off and the motor is stopped, operation
is
normal and no motor fault exists.

NOTE: Shorting or mis-wiring low-voltage
system wiring will not
cause damage to unit control or user interface but may cause low

The ECM

LED

stop, the MOTOR

and status

1. Check system wiring to be sure User Interface is powered
and connections
are made A to A, B to B, etc. and wiring is

voltage

a demand

operate, the MOTOR LED will be turned on and will flash each time
instructions are sent to the motor. When the motor is commanded
to

code is displayed,

not shorted.
Mis-wiring
communications
wiring
communications.

of blower

to run the blower

line and works with the unit control microprocessor

and
the STATUS
LED
troubleshooting
infornration.

is open, check system wiring before replacing it to be sure a
short does not cause a failure of replacement
fuse.
If COMM

maintains

a lockout

User

Motor LED in Troubleshooting

MOTOR

comnmnication

to be sure

sureitisnotblown.

will not cause

will attempt

25 seconds,
the motor will shut
communications
to be reestablished.

code is not displayed;
1. Check system transformer
the system is powered.

using

every five seconds, even when the motor is idle. If, during operation.
the unit control does not communicate
with the motor for more than

C, Y. O, W terminal strip connections
and will display Status (;ode
16, System Communication
Fault, on amber STATUS LED. No
further troubleshooting
information
will be available
at User
Interface until communications
are re-established.
LED does not light within

pressure

control will not operate electric heaters while a fault condition
exists. The unit control communicates
with the motor at least once

exceeding 2 minutes, the Infinity control will only allow emergency
heating or cooling operation using a common thermostat and the R,

If COMM

static

Blower

operation.

for a period

system

screens with access panel in place.

long as User Interface
If. at any time, communications

and

service

NOTE:

LED will be

airflow

Interface

alone can be

and STATUS
information.

SLOWLY

LED

is

COMMUNICATION
connected

to

the

FAULT
blower

motor

line and works with the unit control microprocessor
LED to provide

unit operation

and troubleshooting

When motor is commanded
to operate, the MOTOR LED will be
turned on and will flash each time instructions are sent to the motor.

1. Low static pressure loading of blower while access panel is
removed will cause blower to run slowly. Particularly at low
airflow requests. This is normal, do not assume a fault exists.
18

When
themotor
iscommanded
tostop,
theMOTOR
LED,,villbe
turnedoff. TheMOTORLEDwill not flashto indicate
communications
when
itisturned
off.
Unitcontrol
isconstantly
communicating
withthemotor,
even
whenthemotorandMOTOR
LEDareoff.If motordoes
not
acknowledge
receipt
ofcommunications,
thecontrol
willdisplay
Status
(;ode44 on STATUS
LEDandcontinue
to try to
communicate
with the motor.If motoracknowledges
communication,
status
code
willbecleared.
If MOTOR
LEDislitandflashing
andmotor
does
notrun:
1.Check
theSTATUS
LED.If STATUS
LEDisindicating
a
Status
44code,
check
themotor
wiringharness
forproper
connection
tocontrol
andmotor
receptacles.
2.Check
motor
wiringharness
tobesure
allwiringcomplies
withwiringdiagram
description,
makes
acomplete
circuit
fromconnector
toconnector,
andisnotshorted.
3.Check
12-vdc
lowvoltage
supply
tomotor
atpins1(+)and
2(-)ofmotor
header
connection
tounitcontrol.
Ifallchecks
arenormal,
unitcontrol
isgoodand
control
module
on
motormayneed
replacement.
Check
motorandMotorControl
Module
following
theinstructions
in Section
C,ECMMotor
Troubleshooting.
Shorted
ormis-wiring
ofthelowvoltage
motor
harness
wiring
will
notcause
damage
tounitcontrol
ortomotor
control
module.
If theMOTOR
LEDisoff.STATUS
LEDisindicating
aStatus
(;ode
44andmotor
isrunning:
1.Disconnect
themotor
harness
attheunitcontrol.
If motor
continues
torun.unitcontrol
isgood
and
control
module
on
motor
mayneed
replacement.
STATUS
CODE
25,INVALID
MOTOR
/ MODEL SELECTION

2. If symptoms

3. Check

NOTE:

is incorrect

(;ODE

26. INVALID

wiring of resistor

harness

at unit

value greater than

assembly.

is an approved

size for unit

Unit control will not operate electric heater until this Status
If the heater size is set through

the heater will be operated
desired,

as a single

the User Interface.

stage heater.

If staging

is

the IDR value must be read in by the unit control.

STATUS CODE 36. HEATER
ENERGIZED

OUTPUT

NOT SENSED

Unit control is provided with circuitry to detect presence
signal on electric heater stage 1 and stage 2 outputs.

WHEN

of a 24-vac

If unit control energizes either heater stage and does not detect the
24-vac signal on output, Status Code 36 will be displayed on the
STATUS
LED, unit control will continue
to energize heater
output(s)
energized

and adjust blower operation
electric heat stage(s).

to a safe airflow

level

for

Unit control

or

To find the fault:
1. Check for 24-vac on heater stage outputs.
sensing circuit may be bad.
NOTE:

It may be useful

procedure
Code

to disconnect

16 enabling

which

heater

operation.
electric

When

heater

troubleshooting

is energized
outputs

to force Status

heat mode. It is difficult

unit is operated
both

Terminal

as an electric

the system communications

of emergency

output

heaters,

together.

or not

energized

in emergency

are energized

strip inputs to control

to know
in normal

heat mode using
and de-engergized

can then be connected

W to turn on both electric heat outputs.
circuits can then be checked to resolve

R to

Heater output sensing
Status Code 36 or 37

problems.

on STATUS

STATUS

LED.

for model

size, motor

must

HEATER

CODE

If MOTOR

41, BLOWER

MOTOR

LED is lit and flashing

FAULT

and motor

does not run:

1. Check STATUS LED. If STATUS LED is indicating Status
Code 41, motor control has detected that the motor will not
come up to speed within

30 seconds of being commanded

to

run or that the motor has been slowed to below 250 rpm for
more than 10 seconds after coming up to speed. Motor

be

replaced with proper size motor. Unit control will not
respond to operation
requests until this fault condition
is
resolved.
STATUS

for proper

Code is resolved.

2. If model size data is missing (as is the case when a
replacement
control
board is installed),
system
User
Interface will prompt installer to enter correct model size
from a list of valid sizes.
size

wiring

for unit size or size data is invalid,

Status Code 25 will be displayed

3. If motor

disconnect

and check for a resistance

4. Make sure heater size installed
and size installed.

On initial start-up, unit control shall poll motor for its size data and
check unit size data stored in unit control memory.
1. If motor size is incorrect

persist,

control board
5000 ohms.

wiring

harness

and unit control

are operating

properly,

do

is not rubbing

the

not replace.
2. Check

SIZE

to be sure that the blower

wheel

housing.
On initial power-up,
unit control will write into memory electric
heater size as read from heater if heater is provided with Identifier

3. Check

4. Check

that this is correct will establish that the
an electric heater accessory.
Upon

section

following

instructions

in

the motor control

module

may need

replacement.
CODE

16. SYSTEM

COMMUNICATION

FAULT

Code 26 will be
If, at any time, system communications
period exceeding
2 minutes,
the unit

If heater installed is equipped with a resistor connected to pins i and
2 of heater harness connector and status code 26 is displayed on
STATUS LED:
connections

windings

C, ECM Motor Troubleshooting.

If all these checks are normal,
STATUS

1. Check wiring harness
secure.

motor

Section

choosing negative option, installer will be prompted to select heater
size installed from a list of valid heater sizes for unit size installed.
Status

shaft is not seized

properly).

connected to pins 1 and 2 of heater harness connector. If no resistor
is found, system User Interface will prompt installer to verify that no

If heater ID resistor value read is invalid,
displayed on STATUS LED.

to be sure that the motor

(motor control module must be renroved and electronics
disconnected
from
windings
to perform
this check

Resistor (IDR). Heater size must be valid for combination
of indoor
and outdoor components installed. Unit control will read IDR value

heater is installed. Verifying
unit is operating
without

motor

to be sure connections

emergency
thermostat,

are not successful
control will only

heating
or cooling
operation
using
a common
and the R, C, Y. O, W terminal strip connections
and,,vill

display Status code 16 on the amber STATUS

are

for a
allow

LED (see section

E,

Emergency
Heating
and Cooling
Modes).
No further
unit
troubleshooting
information
will be available at the User Interface
until communications
are re-established.

19

Check
system
wiringtobesure
theUser
Interface
ispowered
and
connections
aremade
AtoA,BtoB.etc.,
and
wiring
isnotshorted.
Mis-wiring
orshorting
oftheABCD
communications
wiring
will
notallow
successful
communications.
Correcting
wiring
faults
will
clear
thecode
andre-establish
communications.
Shorting
ormis-wiring
thelowvoltage
system
wiring
willnotcause
damage
tounitcontrol
ortoUser
Interface
butmaycause
thelow
voltage
fusetoopen.
STATUS
(;ODE
46,BROWNOUT
CONDITION
If thesecondary
voltage
ofthetransformer
fallsbelow
15-vac
for
aperiod
exceeding
4seconds,
Status
Code
46willbedisplayed
on
STATUS
LEDandtheUserInterface
willcommand
thecontrol
board
toturnoffYoutput
controlling
compressor.
Whensecondary
voltage
risesabove
17-vac
formorethan4
seconds,
thebrownout
condition
iscleared
andnormal
system
operation
will resume
subject
to anyminimum
compressor
off-delay
function
which
may
beineffect.
Brownout
does
notaffect
blower
orelectric
heater
operation.
STATUS
CODE
53,OUTDOOR
AIRTEMPERATURE
SENSOR
FAULT
IfanOATsensor
isfound
atpower-up,
input
isconstantly
checked
tobewithinavalidtemperature
range.
If sensor
isfound
tobeopen
orshorted
atanytimeafter
initialvalidation,
Status
(;ode
53willbe
displayed
atamber
STATUS
LED.
Check
forfaults
inwiringconnecting
sensor
toOATterminals.
Using
anOhmmeter,
check
resistance
ofthermistor
forashortor
open
condition.
If thermistor
isshorted
oropen,
replace
it toreturn
thesystem
to
normal
operation.
Iffaultisinthewiring
connections,
correcting
the
faultwillclear
thecode
andreturn
thesystem
tonormal
operation.
NOTE:
Iffaultcondition
isanopen
thermistor
orawiring
problem
thatappears
tobeanopen
thermistor
andthepower
totheunitis
cycled
off.thefaultcode
willbecleared
onthenextpower-up
but
thefaultwillremain
andsystem
operation
willnotbeasexpected.
Thisisbecause
on power-up,
the unit control cannot discern the
difference

between

Step 2--Sequence

NOTE:

Once

should

not be started

interface.

The

Interface

User

uses

humidity

pressure

other

the indoor blower

at requested

Install a bi-flow

opened

for repair.

be adjusted
and indoor

and outdoor temperature
the system operation
for

occupant
literature

comfort and system efficiency. Refer
for further system control details.

to User Interface

Airflow

during

be greater

electric

heater

operation

must

remaining

minimum level for safe operation. If User Interface instructs unit to
turn on electric heat and the requested
airflow is less than the
minimum level the unit control will override requested value.

delay built

ports to relieve

system

refrigerant.

accepted

practices.
the system has been

for leaks using an approved

method.

and reclaim

refrigerant

if no

Puron (R-410A)
refrigerant,
using a
cylinder or accurate scale. Refer to unit

rating plate for required

charge.

Adjustments

Complete
the required
procedures
given in the Pre-Start-Up
section before starting the unit. Do not jumper any safety devices
when operating the unit. Do not operate the unit in cooling mode
when

the outdoor

temperature

is below

40°F (unless

accessory.

low-ambient
kit is installed). Do not rapid cycle the compressor.
Allow 5 min. between "on" cycles to prevent compressor
damage.
CHECKING

COOLING

AND

HEATING

CONTROL

OPERATION
Start and check the unit for proper control
1. Place room UI SYSTEM
position.

Observe

operation

switch or MODE

that blower motor

is placed in FAN ON position

as follows:
control

in OFF

starts when FAN mode

and shuts down within

(030-060
size) or 30 sec (024 size) when
switch is placed in AUTO position.

FAN

60 sec
MODE

2. Place system switch or MODE control in HEAT position. Set
control above room temperature.
Observe that compressor.
outdoor fan, and indoor blower motors start. Observe that
heating

cycle shuts down when control
using

an automatic

changeover

setting is satisfied.
room

thermostat.

place both SYSTEM
or MODE control and FAN mode
switches in AUTO positions. Observe that unit operates in
cooling mode when temperature
control is set to "call for
cooling" (below room temperature),
and unit operates in
heating mode when temperature
control is set to "call for
heating"

(above

IMPORTANT:
oriented.

Unit

room temperature).

Three-phase,
must

be

scroll

checked

compressors

to ensure

proper

are

direction

compressor

3-phase power lead orientation. If not corrected within 5 minutes.
the internal protector will shut off the compressor.
The 3-phase
power leads to the unit must be reversed

than a

it

The

Leaks

refrigerant
system
leaks are found.

Step 4_Start-Up

compressor

filter drier whenever

5. Charge unit with
volumetric-charging

airflow for most modes.

from nominal using indoor
humidity
data to optimize

system

4. Evacuate
additional

data

The nominal requested airflow will be 350 cfm per ton of nominal
cooling capacity as defined by unit size. Actual airflow request will

elapsed.

mode.

and low-pressure

and reclaim

NOTE:

supplied from indoor and outdoor system components
to control
heating or cooling system for optimum comfort. The unit will be
commanded
by User Interface to supply airflow. The unit will
operate

have

leaks and charge the unit as follows:

2. Repair leak following

3. Check

heating

for Refrigerant

1. Use both high-

3. When
and

and then has stopped,

4 minutes

there is a 5-minute

Locate and repair refrigerant

in Step 1--Start-Up.

temperature,

until

for heat pump

Step 3--Check

an open sensor or ifa sensor is not installed.

described

Additionally,

into the control

The packaged
heat pump is designed
for installation
with a
communicating
User Interface.
This unit will not respond
to
commands provided by a common thermostat except under certain
situations

has started

again

cooling cycle remains "on" until the room temperature
drops to
point that is slightly below the cooling control setting of the user

of Operation

emergency

the compressor

turning backwards,

the difference

discharge

may be dramatically

2O

pressures

between

to correct rotation.
compressor

When

suction and

lower than normal.

OUTDOOR

INDOOR

COIL

TXV

COIL

in Meterin(
Position

LCS
BPS

Bypass
Position

LEGEND
HPS - High Pressure

Switch

LCS - Loss of Charge

Switch

Accurate#Metering
]

Arrow indicates

Device
direction

of flow

C03011

Fig. 20 - Typical

Heat Pump

OUTDOOR

Operation,

Cooling

Mode

INDOOR COIL

COIL

_,--

TXV in Bypass
Position

.4

LCS
HPS

Metering
Position

LEGEND
HPS - High Pressure Switch
LCS - Loss of Charge Switch
AccuratePMete_ing Device
]

Arrow indicates direction of flow
C03012

Fig. 21 - Typical

Heat

Pump

Operation,

21

Heating

Mode

CHECKING

AND ADJUSTING

REFRIGERANT

The refrigerant
system is fully charged with
refrigerant and is tested and factory sealed.
NOTE:

Adjustment

of the refrigerant

the unit is suspected
charging

CHARGE
Puron

R-410A

charge.

pressures

in cooling

attached

to the outside

suspect

in heating

informative

mode
mode,

plate amount.

the physical

only. A refrigerant

of the service

data

reclaim

indicated

When

adjustment

very minimal.
condition
insufficient

The

The

label is attached

is

level is

DEFROST

to

The defrost

from
mode

to the outside

of the

evaluating

the

to the specified

refrigerant

charge,

an

adjustment

is indicated,

an abnormal
such

to observe
as

on

defrost cycle. When the Quiet Shift switch is

cycle will be observed.

thermostat

is in open

position,

and speedup

pins are

On return to heating operation, compressor will again turn off for an
additional 30 sec and the outdoor fan for 40 sec. When the Quiet

COOLING

Shift is in OFF position,

Use Cooling Charging Chart (Fig. 22). Vary refrigerant until the
conditions
of the chart are met. Note that charging
charts are
used. Charts are based on charging the
for the various operating conditions.

gauge and temperature
sensing
the pressure gauge to the service

reading. Indoor air CFM must be within
of the unit.

1. Turn off power to outdoor

devices are
port on the

CHARGING

the nornral operating

2. Disconnect
board

a

few

temperature

and read the manifold
what

the

lead from

OF2 on control

grounding.

mode, allowing

frost to accumulate

on

range
4. After

to determine

the

unit.

fan motor

3. Restart unit in heating
outdoor coil.

(;HARTS

line temperature

outdoor

(See Fig. 23). Tape to prevent

thermostat
gauges.
Refer to the chart
temperature
should be.

only a brief 30 sec cycle will be observed.

If it is desirable to observe a complete defrost in warmer weather,
defrost thermostat must be closed as follows:

suction line. Mount the temperature
sensing device on the suction
line and insulate it so that the outdoor ambient does not affect the

Take the liquid

depending

selected Quiet Shift position). When Quiet Shift switch is in ON
position, the length of defrost is 1 minute (30 sec compressor
off
period followed by 30 sec of defrost with compressor
operation).

rating plate).

TO USE COOLING

are available

shorted (with a flat head screw driver) for 5 sec and released, a short
defrost cycle will be observed (actual length is dependent upon the

Check
for leak. Use standard
evacuating
techniques.
After
evacuating
system, weigh in the specified amount of refrigerant

pressure
Connect

a complete

defrost

If defrost

NO CHARGE

Accurate
required.

a

selected, compressor
will be turned off for two 30 sec intervals
during this complete defrost cycle, as explained previously. When
Quiet Shift switch is in factory default OFF position, a normal and
complete

different from type normally
units to correct subcooling

which includes

If defrost thermostat is closed, speedup pins (J1) must be shorted by
placing a flat head screw driver in between for 5 sec and releasing,

factory charge must always be

CHARGE

CHARGE

control

30 minutes).

The amount of refrigerant charge is listed on the unit rating plate
and/or the physical data table. Refer to the Refrigeration
Service
Techniques Manual. Refrigerants Section.

LOW

is a time/temperature

time period (DIP switch 1 and 2 on the board)
cycles of 30, 60, 90. or 120 minutes (factory set at

To initiate a forced defrost, two options
the status of the defrost thermostat.

If a substantial

(refer to system

control

field-selectable
between defrost

and the tables
in cooling

exists somewhere
in the cooling
system,
airflow across either coil or both coils.

REFRIGERANT

label

and charge

label

and pressures

de-energize,
compressor
will turn off for another 30 sec, and the
outdoor fan will stay off for 40 sec, before starting in the heating
mode.

and

may be obtained

charging

temperatures

only. A refrigerant charging
service access door.
IMPORTANT:

all refrigerant

(This information

table also.)

shown refer to system

charging

access door. If charge

is

off for 30 sec and then turn back on to complete defrost. At the start
of heating
after conclusion
of defrost
reversing
valve will

unless

label and the tables shown refer to system temperatures

and a defrost

initiated, the following sequence of operation will occur. Reversing
valve will energize, outdoor fan will turn off, compressor
will turn

(R-410A)

charge is not required

of not having the proper

When Quiet Shift switch is placed in ON position,

minutes

should

drop

(approximately

in

heating

below

mode,

closing

liquid-line

point

of defrost

30°F).

pressure
liquid

NOTE:

line

Unit will remain in defrost until defrost thermostat

at approximately

80°F coil temperature

reopens

at liquid line or remainder

of defrost cycle time.
NOTE:

If the

problem

causing

refrigerant

leak. refer to Check

INDOOR

AIRFLOW

inaccurate

for Refrigerant

AND AIRFLOW

NOTE: Be sure that all supplyfrom obstructions,
and adjusted
Unit 50CR

the

Step 5--Defrost

Leaks

is a
5. Turn off power to outdoor and reconnect
OF2 on control board after above forced

section.

ADJUSTMENTS

and return-air
properly.

utilizes state of the art ECM

Motor) ID Blower
detailed information

readings

NON-COMMUNICATING
HEATING MODE

grilles are open. free

(Electronic

Motors.
See user interface
on adjusting airflow.

This mode of operation
failed or is otherwise

Computated

instructions

established

for

fan motor lead to
defrost cycle.

EMERGENCY

COOLING

/

is provided only in the case where the UI has
unavailable.
If communications
cannot be

with the UI, the Infinity

following thermostat input terminals
control of the 50CR unit:

control
to allow

board

will enable the

simple thermostatic

Control
a. Y & O for cooling

QUIET

SHIFT

Quiet Shift is a field-selectable
occasional

defrost

noise that could be heard at the start of defrost

restarting of heating cycle. It is selected
defrost board) in ON position.

b. W for electric heat (if applicable)

mode, which will eliminate
by placing

c. Y for heat pump

cycle and

DIP switch 3 (on

The Infinity control
with the maxinmm
applicable)

22

heat

will respond to cooling and heating demands
safe airflow based on electric heat size (if

and unit capacity.

Required

Subcooling

oF (oC!

Outdoor Ambient

Required

Temperature

Lic_uid Line Temperature

Required SubcooEng

for a Specific

Subcooling

!°F)

(R-4tOA!

Required

Subcooling (°C)

Model Size
75 (24)

82 (25)

85 (29)

95 (35)

105 (4t)

Presstm

)ressurc
(peig)

5

10

15

20

25

3

6

8

11

14

tO,3 (5,7)
9,3(5.2)

9,8(5,4)
8,8(4,9)

9,4(5,2)
8,6(4,5)

9(5)
7,8(4,3)

8,6(4,7)
7(3,9)

t89
t96

St
63

56
58

51

46

41

1303

16

13

11

8

5

53

48

43

1351

17

15

12

9

8

16,5(9.8)
12.7 (7,t)

18.8 t 9.2 )
12,7(7,1)

t8.4 ( 8,8 )
t2,6(7)

14,3(7,9)
12.6(7)

203
210

88
68

81
63

56

51

46

1399

19

16

13

10

8

O42

t7,8 ( 9.8 )
t2,8 (7,1)

58

53

48

1448

20

17

14

11

9

O48

t7,5 ( 9.7 )

16.9(9,4)

16.6(9,2)

t5.7 ( 8,7 )

14,8(8.2)

217

70

65

60

55

50

1498

21

18

15

13

10

14.5(8.1)

11.5 ( 8.4 )

224
231
238

72
74
76

87
69
71

62

57

52

1544

22

19

18

14

11

64

59

54

1598

23

20

18

15

12

66

61

56

1641

24

21

19

18

13

245

77

72

67

62

57

1689

25

22

20

17

14

252

79

74

69

64

59

1737

26

23

21

18

15

260
268

81
83

78
78

71

66

St

1792

27

25

22

19

16

73

68

53

1848

29

26

23

20

17

276

85

80

75

70

85

1903

30

27

24

21

19

284

87

82

77

72

87

1958

31

28

25

22

20

292

89

84

79

74

89

2013

32

29

26

23

21

300

91

88

81

76

71

2088

33

30

27

24

22

5- Interpolate if the Outdoor ambient temperature lies in between the table
values, Extrapolate
if the temperature lies beyond the table range.

309

93

88

83

78

73

2130

34

31

28

28

23

318

95

90

85

80

75

2192

35

32

29

27

24

6- Find the Pressure Value in the table corresponding
Pressure of the Compressor
Discharge line.

327

97

92

87

82

77

2254

36

33

31

28

25

336

99

94

89

84

79

2318

37

34

32

29

26

345

101

98

91

86

81

2378

38

35

33

30

27

354

103

98

93

88

83

2440

39

36

34

31

28

364

105

100

95

90

85

2509

40

38

35

32

29

374

107

102

97

92

87

2578

41

39

36

33

30

384

108

103

98

93

88

2647

42

40

37

34

31

394

110

105

100

95

90

2718

44

41

38

35

32

404

112

107

102

97

92

2785

45

42

39

36

33

414

114

109

104

99

94

2854

46

43

40

37

34

424

116

111

106

101

96

2923

47

44

41

38

35

434

118

113

108

103

98

2992

48

45

42

39

36

444

119

114

109

104

99

3081

48

46

43

40

37

454

121

116

111

106

101

3130

49

47

44

41

38

464

123

118

113

108

103

3199

50

48

45

42

39

474

124

119

114

109

104

3268

51

48

46

48

40

484

126

121

118

111

106

3337

52

49

47

44

41

494

127

122

117

112

107

3408

53

50

47

45

42

504

129

124

119

114

109

3475

54

51

48

48

43

514

131

126

121

118

111

3544

55

52

49

48

44

524

132

127

122

117

112

3612

56

53

50

47

45

534

134

129

124

119

114

3681

56

54

51

48

45

O24
O30
O36

O60

13.7{7.8)
CharqincLProcedure

t- Measure

Discharge

t3 { 7.2 )

line pressure

by attaching

2- Measure the Liquid line temperature
device to it.
3- insulate the temperature
doesn't affect the reading.

sensing

4- Refer to the required Subcooling
the Outdoor Ambient temperature.

13(7.2)

by attaching

a temperature

device so that the Outdoor

port.

sensing

Ambient

in the table based on the model size and

7- Read across from the Pressure reading
temperature
for a required SubcooEng
8- Add Charge if the measured

a gauge to the service

to the the measured

to obtain the Liquid line

temperature

is higher

than the table value,

(kPa)

H
C03027

Fig. 22 - Cooling

Table

3--ECM

Charging

Wet Coil Pressm_

UNIT

STANDARD

SIZE

600

700

800

9OO

1000

024

0.005

0.007

0.010

0.012

0.015

0.007

0.010

0.012

0.015

0.018

0021

0024

0.019

0.023

0.027

0032

0.014

0.017

0020
0027

030
036
042

1100

1200

048

Table-Subcooling

CFM

1300

Drop

1400

1500

0037

0042

0.047

0024

0027

0032

0036

060

Table
FILTER SIZE
20X20X1

500
0.05

600
0.07

700
0.08

24X30X1

800
0.1

4--Filter

Pressure

1600

1700

1800

0.031

0.035

0.039

0.043

0.041

0.045

0.052

0.029

0.032

0.036

Drop Table
CFM

900
0.12

1000
0.13

1100
0.14

1200
0.15

1300

1400

0.05

0.6

0.07

0.07

0.08

0.09

0.1

0.06

0.07

0.07

0.08

24X36X1

Table

5--Electrlc
Small

(in. wg)

(SCFM)
1900

2000

0.057

0.053

0.058

0.040

0.045

0.049

2100

0.053

(in. wg)

1500

1600

1700

1800

1900

2000

2100

2200

2300

0.09

0.09

0.10

0.11

0.12

0.13

0.14

0.14

Heat Pressure
Drop Table
Cabinet:
024=036
GFM

5 kw

500
0.00

600
0.00

700
0.00

800
0.00

900
0.00

1000
0.00

1100
0.00

1200
0.00

1300
0.02

1400
0.04

1500
0.08

1600
0.07

7.2 kw
10 kw

0.00
0.00

0.00
0.00

0.00
0.00

0.00
0.00

0.00
0.00

0.00
0.02

0.02
0.04

0.03
0.06

0.05
0.07

0.07
0.09

0.08
0.10

0.09
0.11

15 kw

0.00

0.00

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

0.18

20 kw

0.00

0.00

0.02

0.04

0.06

0.08

0.09

0.11

0.13

0.15

0.17

0.19

23

Table

6--Electric

Heat Pressm'e

Large

Cabinet:

Drop Table

042-060
GFM

1100

1200

1300

1400

1500

1600

1700

1800

1900

2000

21 O0

2200

2300

2400

2500

5kw
7.2 kw

0.00
0.00

0.00
0.00

0.00
0.01

0.01
0.02

0.02
0.03

0.03
0.04

0.04
0.05

0.05
0.06

0.06
0.07

0.07
0.08

0.08
0.09

0.09
0.10

0.10
0.11

0.11
0.12

0.12
0.13

10 kw

0.00

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.10

0.11

0.12

0.13

15 kw

0.00

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.10

0.11

0.12

0.13

0.14

0.15

20 kw

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.10

0.11

0.12

0.13

0.14

0.15

0.16

o

---

o

m

r,o

_

-<_

--<:>--

_

O

-C:>-

o

--C:)_

-<=>-

-C:D--

O
-CZ3-

<_

CESO1
Quiet
Shift

Speedup
Pins

30076-00

Defrost interval
DIP switches

Fig. 23 - Defrost Control
MAINTENANCE
To ensure
possibility

continuing
high performance,
and to nainimize the
of premature equipment
failure, periodic maintenance

ELECTRICAL

must be performed on this equipment. This heat pump unit should
be inspected at least once each year by a qualified service person. To
troubleshoot

unit. refer to Table 8, Troubleshooting

NOTE TO EQUIPMENT
OWNER:
about the availability
of a maintenance

Consult
contract.

caution

3. Never place anything
with the unit.
INJURY

AND UNIT DAMAGE

could

result in serious injury

1. Turn off electrical power to the unit before
maintenance
or service on this unit.

local dealer

2. Use extreme

PERSONAL

HAZARD

Failure to follow these warnings
or death:

(;hart.
your

SHOCK

when removing
combustible

perfornring

panels

any

and parts.

either on or in contact

HAZARD

Failure to follow this warning could result in personal
or death and possible unit component damage.

injury

The ability to properly
perform
maintenance
on this
equipment requires certain expertise, mechanical
skills, tools
and equipment.
If you do not possess these, do not attempt to
perform any maintenance
on this equipment,
other than those
procedures recommended
in the Owner's Manual.

UNIT

24

OPERATION

HAZARD

Failure to follow this caution may result in equipment
or improper operation.

damage

Errors made when reconnecting
wires may cause
and
dangerous
operation.
Label
all wires
disconnecting
when servicing.

improper
prior
to

Theminimum
maintenance
requirements
forthisequipment
areas
follows:
1.Inspect
airfilter(s)
eachmonth.
Clean
or replace
when
necessary.
2.Inspect
indoor
coil,drainpan.andcondensate
draineach
cooling
season
forcleanliness.
(;lean
when
necessary.
3.Inspect
blower
motor
and
wheel
forcleanliness
each
cooling
season.
(;lean
when
necessary.
4.Check
electrical
connections
fortightness
andcontrols
for
properoperation
eachcoolingseason.
Service
when
necessary.
StepI--Air Filter
IMPORTANT:

Never operate the unit without

in the return- air duct system. Always

a suitable

Step 4_Outdoor

UNIT

installed.

1. Remove
cover.

the filter becomes

Step 2--Indoor

Blower

NOTE: All motors
these motors.

clogged

expose

1 for

6 screws holding

accumulated

dirt and grease

from

the blower

efficiency,
wheel

grille and motor

upside

down

to top

on top cover

for cracks

to

or bends.

loosen setscrew

5. When replacing

position

fan blade,

and slide fan off

blade so that the hub is

1/8 in. away from the motor end (1/8 in. of motor
be visible) (See Fig. 24).
6. Ensure that set screw engages
when tightening.

Do not attempt to lubricate

and continuing

outdoor

assembly

3. Inspect the fan blades

and Motor

economy,

to unit

fan blade.

7. Replace
For longer life, operating

may result in damage

4. If fan needs to be removed,
motor shaft.

with dust and lint.

are pre-lubricated.

this caution

2. Turn motor/grille

Inspect
air filter(s)
at least once each month
and replace
(throwaway-type)
or clean (cleanable-type)
at least twice during
each cooling
season and twice during the heating season,
or
whenever

HAZARD

Keep the condenser fan free from all obstructions
to ensure
proper cooling operation. Never place articles on top of the
unit.

air filter

See Table

OPERATION

Failure to follow
components.

replace the filter with the same

dinmnsional
size and type as originally
recommended
filter sizes.

Fan

shaft will

the flat area on the motor shaft

grille.

clean

and motor

annually.

ELECTRICAL

SHOCK

HAZARD

Failure to follow this warning
or death.

could result in personal

injury

Infinity Top
A06035

Disconnect
and tag electrical power to the unit before cleaning
and lubricating the blower motor and wheel.

"A"

UNIT SIZE

DIMENSION
Infinity

Step 3--Outdoor
Drain Pan

(?oil, Indoor

Coil, and Condensate

Inspect the condenser coil. evaporator
pan at least once each year.

coil, and condensate

The coils are easily cleaned when dry; therefore,

drain

inspect and clean

024

25

030

25

036

24

042

24

048

24

060

19

Fig. 24 - Fan Blade

the coils either before or after each cooling season. Remove all
obstructions,
including weeds and shrubs, that interfere with the
airflow through the condenser coil. Straighten bent fins with a fin
comb. If coated with dirt or lint, clean the coils with a vacuum

Step 5--Electrical
Inspect

cleaner, using the soft brush attachnmnt. Be careful not to bend the

insulation,

wiring,

connections.
disassemble

and wiring

annually.

Be

to the unit.

If any smoky or burned connections
the connection,
clean all the parts, re-strip

and reassemble

the connection

properly

are noticed,
the wire end

and securely.

After inspecting
the electrical controls and wiring, replace all the
panels. Start the unit, and observe at least one complete cooling

Inspect the drain pan and condensate drain line when inspecting the
coils. (;lean the drain pan and condensate
drain by removing all
foreign matter from the pan. Flush the pan and drain trough with
air filter(s). If the drain trough is restricted,
snake" or similar probe device.

controls

power

Remove access panel to locate all the electrical controls and wiring.
Check all electrical connections
for tightness. Tighten all screw

or air

filter(s). For best results, spray condenser
coil fins from inside to
outside the unit. On units with an outer and inner condenser coil, be
sure to clean between the coils. Be sure to flush all dirt and debris
from the unit base.

clear water. Do not splash water on the insulation,

and Wiring

and check the electrical

sure to turn off the electrical

fins. If coated with oil or grease, clean the coils with a mild detergent
and water solution. Rinse coils with clear water, using a garden hose.
Be careful not to splash water on motors,

Controls

Clearance

cycle to ensure proper operation.
operating cycle, or if a suspected

motor, wiring, or

each
electrical
instrumentation.
checks.

clear it with a "plumbers

25

If discrepancies
are observed in
malfunction
has occurred, check

component
with
Refer to the unit wiring

the
proper
electrical
label when making these

Balance

Point

Worksheet

7O

60
CD

o
C::t.

o° o
g,m

50

Bg-

4o

O60
048
042
036

"-

30
030

:5

E

5

=

CO

r-

024
20

10

-2O

-10

0

10

20

Outdoor

Air

30

Temp

40

(Deg

50

6O

F)

C03008

Fig. 25 - 50CR Balance

Step 6--Refi*igerant

Point Worksheet

Circuit

Inspect all refrigerant tubing connections
and the unit base for oil
accunmlation
annually.
Detecting
oil generally
indicates
a
refrigerant

leak.

If oil is detected or if low performance
is suspected, leak test all
refrigerant tubing using an electronic leak detector, or liquid-soap
solution.
If a refrigerant
Refrigerant Leaks section.
If no refrigerant

leak

is detected,

refer

to Check

leaks are found and low performance

refer to Checking
Step 7--Indoor

and Adjusting

Refrigerant

for

is suspected,

Charge section.

Airflow

The heating and/or cooling airflow does not require checking unless
improper performance
is suspected. If a problem exists, be sure that
all supplyobstructions,

and return-air
grilles
are
and that the air filter is clean.

Step 8--Metering

Devices-TXV

open

& Accurater

and

free

from

Piston

This unit uses 2 types of nmtering devices. The outdoor metering
device is a fixed orifice and is contained in the brass- hex body in the
liquid line feeding the outdoor
a TXV-type
device.
Step 9--Pressure

Switches

Pressure

are protective

switches

coils. The indoor metering

devices

wired

into control

device is

C99097

circuit
Fig. 26 - Refrigerant

(low voltage). They shut off compressor
if abnormally
high or low
pressures are present in the refrigeration
circuit. These pressure
switches
systems.

are specifically
R-22 pressure

for the Puron

(R-410A)

designed to operate with Puron (R-410A)
switches must not be used as replacements

Step 10--Loss-of-Charge

Circuit

Switch

This switch is located on the liquid line and protects against
suction pressures caused by such events as loss of charge,

system.
26

low
low

airflow
across
indoor
coil,dirtyfilters,
etc.It opens
onapressure
drop
atabout
20psig.
Ifsystem
pressure
isabove
this,switch
should
beclosed.
Tocheck
switch:
1.Turnoffallpower
tounit.
2.Disconnect
leads
onswitch.
3.Applyohmmeter
leads
across
switch.
Youshould
have
continuity
onagood
switch.
NOTE:
Because
these
switches
areattached
torefrigeration
system
underpressure,
it is notadvisable
to remove
thisdevice
for
troubleshooting
unless
youarereasonably
certain
thataproblem
exists.
If switch
must
beremoved,
remove
andrecover
allsystem
charge
sothatpressure
gauges
read0 psi.Never
opensystem
without
breaking
vacuum
withdrynitrogen.
Stepll--High-Pressure
Switch

REFRIGERANT

PERSONAL

COMPRESSOR

2. Disconnect

fan

SERVICING
MATERIALS

Exposure,

Scroll

OIL

SYSTEMS

ON

ROOFS

WITH

SYNTHETIC

POE (polyolester)
compressor
lubricants are known
term damage to some synthetic roofing materials.

to unit.

3. Apply ohm meter leads across
continuity on a good switch.
Compressor

switch.

You should

(Puron

have

even

if

inmmdiately

cleaned

up,

to cause long

may

cause

embrittlement
(leading to cracking) to occur in one year or more.
When performing any service that may risk exposure of compressor

Refrigerant)

The compressor used in this product is specifically
designed
operate
with Puron
(R-410A)
refrigerant
and cannot

injury,

oils designed for HCFC and CFC refrigerants.
Take all necessary
precautions
to avoid exposure of the oil to the atmosphere.

leads on switch.

Step 12--Copeland

HAZARD

The compressor
in this system uses a polyolester
(POE) oil, Mobil
3MA POE. This oil is extremely hygroscopic,
meaning it absorbs
water readily. POE oils can absorb 15 times as much water as other

To check switch:
1. Turn off all power

OPERATION

hoses, and recovery system must be designed to handle Puron.
If you are unsure, consult the equipment manufacturer.

psig.
coil, failed

UNIT

This system uses Puron (R-410A)
refrigerant
which has
higher operating pressures than R-22 and other refrigerants.
No other refrigerant may be used in this system. (_auge set,

The high-pressure
switch is located in the discharge
line and
protects against excessive condenser coil pressure. It opens at 650

High pressure may be caused by a dirty outdoor
motor, or outdoor air recirculation.

INJURY,

Failure to follow this caution may result in personal
equipment damage or improper operation.

oil to the roof. take appropriate
precautions
to protect roofing.
Procedures
which risk oil leakage include, but are not limited to,
compressor
replacement,
repairing refrigerant leaks, and replacing

to
be

refrigerant
components
such as filter drier,
metering device, coil. accunmlator,
or reversing

interchanged.
The compressor
is an electrical (as well as mechanical)
device.
Exercise extreme caution when working near compressors.
Power
should be shut off, if possible, for most troubleshooting
techniques.
Refrigerants present additional safety hazards.

Synthetic

Roof

1. (;over

Precautionary
extended

polyethylene
approximate

roof

pressure
valve.

switch.

Procedure
working

(plastic)
drip
10 X 10 ft area.

area with
cloth

or

an impermeable
tarp.

(;over

an

2. (;over area in front of the unit service panel with a terry cloth
shop towel to absorb lubricant spills and prevent run-offs,
EXPLOSION,

FIRE,

ELECTRICAL

SHOCK

Failure to follow this warning could result in personal
or death and/or property damage.
Wear safety glasses and gloves when
Keep torches
and
other
ignition
refrigerants
and oils.

handling
sources

and

HAZARD

protect

drop

cloth

from

tears

caused

by

tools

or

components.

injury

3. Place terry cloth shop towel inside unit imnmdiately
component(s)
to be serviced and prevent lubricant
through the louvered openings in the unit base.

refrigerants.
away from

4. Perform

required

service.

5. Remove and dispose
local codes.

The scroll compressor
pumps refrigerant throughout
the system by
the interaction
of a stationary and an orbiting scroll. The scroll

LIQUID-LINE

FILTER

under
run-offs

of any oil-contaminated

material

per

DRIER

compressor
has no dynamic suction or discharge valves, and it is
more tolerant of stresses caused by debris, liquid slugging, and

The biflow filter drier is specifically

flooded starts. The compressor
is equipped with an anti-rotational
device and an internal pressure-relief
port. The anti-rotational

Use only factory-authorized
components.
Filter drier must be
replaced
whenever
the refrigerant
system
is opened.
When
removing a filter drier, use a tubing cutter to cut the drier from the

device prevents the scroll from turning backwards and replaces the
need for a cycle protector. The pressure-relief
port is a safety device,
designed to protect against extreme high pressure. The relief port
has an operating

range

between

550

and

625

system.

psi differential

PURON
scroll compressor

uses Mobil

is the only oil allowed

for oil recharge.

Step 13--Refrigerant

System

to operate with Puron.

system. Do not unsweat a filter drier from the system. Heat from
unsweating will release moisture and contaminants
from drier into

pressure.
The Copeland

designed

3MA POE oil. This

(R-410A)

REFRIGERANT

Refer to unit information

CHARGING

plate and charging

chart. Some

R-410A

refrigerant
cylinders
contain
a dip tube to allow liquid
refrigerant
to flow from cylinder
in upright
position.
For
cylinders equipped
with a clip tube. charge Pnron (_: units with

This step covers the refrigerant system of the 50CR, including the
compressor
oil needed, servicing
systems on roofs containing
synthetic materials, the filter drier, and refrigerant charging.

cylinder in upright position and a commercial nmtering
manifold hose. Charge refrigerant into suction line.

27

device

in

Step 14--System

Information

LOSS-OF-CHARGE

Unit Top

SWITCH

The loss of charge switch is a protective device wired into control
circuit (low voltage). It shuts off the compressor if abnormally
low
pressures are present in the refrigeration circuit.

Defrost
Sensor_

NOTE: Because these switches
under

pressure,

it is not

are attached

advisable

troubleshooting

unless

exists. If switch

must be removed,

charge

so that pressure

without

breaking

CHECK

to remove

you are reasonably
gauges

vacuum

DEFROST

to refrigeration
this

system

device

for

certain that a problem

remove

and recover

read 0 psi. Never

all system

open

system

with dry nitrogen.

THERMOSTAT

There is a liquid header with a brass distributor
and feeder tube
going into outdoor coil. At the end of one of the feeder tubes, there
is a 3/8-in. OD stub tube approximately
3 in. long (See Fig. 27). The
defrost thermostat should be located on stub tube.
NOTE: There is only one stub tube used with liquid header, and on
most units it is the bottom circuit.
The defrost

thermostat

signals heat pump

that conditions

Detail A

are right

for defrost or that conditions
have changed to terminate defrost. It
is a thermally-actuated
switch clamped to outdoor coil to sense its
temperature.
Normal
open at 80 ° -+ 5°E

temperature

range is closed

at 30 ° -+ 3°F and

TROUBLESHOOTING
Refer to the Cooling and Heating
for troubleshooting
information.
START-UP
Use the Start-Up

Checklist

Troubleshooting

(;hart (Table 7)

CHECKLIST

at the back of this manual.

A06068

Fig. 27 - Defrost

28

Sensor

Location

HEAT
REFRIGERATION

PUMP

WITH

SECTION

PURON

QUICK-REFERENCE

GUIDE

Puron refrigerant operates at 50-70 percent higher pressures than R-22. Be sure that servicing
designed to operate with Puron. Puron refrigerant cylinders are rose colored.
•

Puron refrigerant

cylinders

manufactured

prior to March

upright

Cylinders

manufactured

March 1, 1999 and later DO NOT

position.

equipnaent

and replacement

components

1. 1999, have a dip tube that allows liquid to flow out of cylinder
have a dip tube and MUST be positioned

to allow liquid to flow.
•

Recovery

•

Puron systems

cylinder

service

•

Manifold

•

Use hoses with 750 psig service

•

Leak detectors

•

Puron,

•

Vacuum

•

Only use factory-specified

•

Do not install a suction-line

•

POE oils absorb

•

POE oils may cause damage

•

Wrap all filter driers and service

•

A Puron

•

Do not use an R-22

•

Never

open system to atmosphere

•

When

system

•

Do not vent Puron

•

Observe

•

Do not leave Puron

should

pressure

be charged

sets should

rating must be 400 psig. DOT 4BA400
with liquid refrigerant.

should

pressure

be designed

will not remove

moisture

liquid-line

metering

device in the manifold

be 750 psig high side and 200 psig low side with 520 psig low side retard.
rating.

to detect HFC refrigerant.

as with other HFCs. is only compatible
pumps

or DOT BW400.

Use a commercial-type

moisture

liquid-line

with POE oils.

from oil.

filter driers with rated working

filter drier in liquid
rapidly.

pressures

no less than 600 psig.

line.

Do not expose

oil to atmosphere.

to certain plastics and roofing

materials.

valves with ,,vet cloth when brazing.

filter drier is required

on every unit.

TXV.

must be opened

while it is under

for service,

a vacuum.

break vacuum

with dry nitrogen

into the atmosphere.

all warnings_

cautions_

suction

and bold text.

line driers in place for more than 72 hrs.

29

and replace filter driers.

hose.

are

in

upside down

Table

7

Troubleshooting

SYMPTOM

Compressor
and outdoor
will not start

II

Compressor
rune

will

not

start

CAUSE

fan

but

Chart

condenser

fan

REMEDY

Power failure

Call power company

Fuse blown or circuit breaker tripped

Replace fuse or reset circuit breaker

Defective contactor, transformer, control relay, defrost
board, or high-pressure,
lossof-charge or low-pressure switch

Replace component

Insufficient line voltage

Determine

Incorrect or faulty wiring

Check wiring diagram and rewire correctly

User Interface setting too low/too high

Reset UI setting

Units have a 5-minute

DO NOT bypass this compressor time
delay wait for 5 minutes until time-delay
relay is de-energized

time delay

Faulty wiring or circuit
Loose connections in compressor

Check wiring and repair or replace

Compressor

Determine

motor burned out, seized, or

internal overload open
Defective run capacitor, overload, or PTC (positive
temperature coefficient) thermistor
One leg of 3-phase

power dead

Low input voltage (20 percent low)
Three-phase

scroll

compressor

(size 030-

060 unit) has a low pressure differential

Scroll compressor

is rotating in the wrong direction

Refrigerant overcharge

Compressor
cycles (other than normally satisfying) cooling/heating
sails

or undercharge

head

pressure

Replace fuse or reset circuit breaker
Determine cause
Determine

cause and correct

Correct the direction
3-phase

of rotation by reversing the

power leads to the unit

Recover refrigerant,
charge to capacities

evacuate system, and reshown on rating plate

Damaged reversing valve
Restriction in refrigerant system

Determine cause and replace
Replace
Determine cause and correct
Locate restriction and remove

Dirty air filter
Unit undersized

Replace filter
Decrease load or increase unit size

Determine

for load
set too low/too high

Frosted coil with incorrect defrost operation

cause and correct

Reset UI setting
Locate leak, repair, and recharge
Check defrost time settings
Reset as necessary
Check defrost temperature switch
Replace as necessary

Outdoor coil dirty or restricted

Recover refrigerant, evacuate system, and recharge
Clean coil or remove restriction

Dirty air filter
Dirty indoor or outdoor coil

Replace filter
Clean coil

Refrigerant overcharged

Recover excess refrigerant

Air in system
(Heat) Indoor air restricted or recirculating
Indoor or outdoor air restricted or air short-cycling

(Continued

cause and replace

Defective run/start capacitor, overload or start relay
Faulty outdoor fan motor or capacitor

Air in system

Excessive

Determine

Replace and determine cause
Determine cause and correct

Low refrigerant charge
operates continuously

cause

Replace compressor

Defective compressor
Insufficient line voltage
Blocked outdoor coil

UI temperature

Compressor

cause and correct

next page)

3O

Recover refrigerant, evacuate system, and recharge
Determine cause and correct
Determine cause and correct

Table
SYMPTOM
Head pressure too low

Excessive suction pressure

7

Troubleshooting

('hart

(Cont'd)

CAUSE

REMEDY

Low refrigerant charge
Restriction in liquid tube
(Cool) High Heat load

Check for leaks, repair and recharge
Remove restriction
Check for source and eliminate

Reversing valve hung up or leaking internally

Replace valve

Refrigerant overcharged
(Cool) Dirty air filter

Recover excess refrigerant
Replace filter
Move timer on control board to 30 minutes between
defrost cycles

(Heat) Outdoor coil frosted
Low refrigerant charge
Suction pressure

too low

(Cool) Insufficient

Increase air quantity
Check filte_replace
if necessary

coil airflow

(Cool) Temperature too low in conditioned
(Cool) Outdoor ambient below 55°F
Filter drier restricted
Compressor

IFM

does

runs

not

but

outdoor

run

fan

does

not

Insufficient

voltage at motor
not properly sealed

Water dripping into motor
operation

IFM

Indoor

area

NO (normally closed) contacts on defrost board
open
Blower wheel not secured to shaft
Power connectors

iFM

Check for leaks, repair and recharge
Remove source of restriction

Metering device or low side restricted

kit

Replace
Check condition of relay on board
Replace if necessary
Properly tighten blower wheel to shaft
Determine cause and correct
Connectors

should snap easily; do not force

Verify proper drip loops in connector wires
Gently pull wires individually to be sure they are
crimped into the housing

is intermittent

Connectors

Reset UI setting
Install low-ambient

not firmly sealed

Fan Motor

31

START=UP CHECKLIST
(Remove

and Store in Job File)

I. Preliminary information
MODEL NO.:
SERIAL NO.:
DATE:
TECHNICIAN:
IL PRE-START=UP (insert checkmark in box as each item is completed)
VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNiT
REMOVE ALL SHIPPING HOLD DOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS
CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS
CHECK GAS PIPING FOR LEAKS (WHERE APPLICABLE)
CHECK THAT INDOOR (EVAPORATOR) AIR FILTER IS CLEAN AND IN PLACE
VERIFY THAT UNIT INSTALLATION IS LEVEL
CHECK FAN WHEEL, AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW TIGHTNESS
MAKE SURE THAT - (If Applicable) ON 060 SIZE PURON HEATPUMP ONLY, THE TWO WIRE TIES FASTEN
TO THE OUTDOOR COILS AND REVERSING VALVE/ACCUMULATOR HAVE BEEN REMOVED

H

ill. START-UP
ELECTRICAL
SUPPLY VOLTAGE
COMPRESSOR AMPS
INDOOR (EVAPORATOR) FAN AMPS
TEMPERATURES
DB
OUTDOOR (CONDENSER) AIR TEMPERATURE
RETURN-AIR TEMPERATURE
DB
WB
COOLING SUPPLY AIR
DB
WB
HEAT PUMP SUPPLY AIR
ELECTRIC HEAT SUPPLY AIR
PRESSURES
REFRIGERANT SUCTION
PSIG SUCTION LINE TEMP*
REFRIGERANT DISCHARGE
PSIG DISCHARGE TEMPt
( ) VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS
*Measured at suction inlet to compressor
tMeasured at liquid line leaving condenser.
A05306

Copyright

2006 Carrier Corp

Manufacturer

reserves

• 7310 W Morris

St • Indianapolis,

iN 46231

the right to change_ at any time_ specifications

and designs

Printed in U.SA.
without

notice

Edition

and without

.32

Date: 03/06

obligations,

Catalog
Replaces:

No: 50CR-1SI
New



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