Download Carrier 38YCG Specifications

38YCC, 38YCG, 38YCS
10 SEER SpMit-System
Heat Pump
HEATUNG & COOUNG
%isitx__ _.carrier.com
tnstammation and Start-Up
NOTE:
Read
installation.
This symhoi
the entire
instruction
--> indicates
a change
SAFETY
Improper
or
installation,
use
can
conditions
damage.
installer
when
Consult
a qualified
installer,
packaged
codes.
gloves.
Have
extinguisher
Electrical
safety
you
manuals,
Understand
instructions
protective
these
instructions
thor°
included
in literature
codes
and National
local building
requirements.
on the unit
words
clotiaing,
operations.
This is the safety-alert
this symbol
the signal
glasses,
or cautions
be alert to the potential
your
installing.
Read
informatiom
see
when
available.
tbr special
or
kits or accessories
clotia fbr brazing
to the unit. Consuh
other
The qualified
to the individual
safety
or
or property
agency,
quenciaing
all warnings
(?ode (NEC)
Recognize
When
Refkr
Wear
Use
and fbllow
and attached
service
or assistance.
the kits or accessories
all safety
fire
injury,
must use fi_ctory=authorized
and work
the
nmintenance,
shock,
personal
for information
this product.
with
service,
electrical
death,
or agency
oughly
fire,
may cause
modifying
Follow
alteration,
explosion,
or branch
starting
since the last issue.
which
distributor
before
CONSIDERATIONS
adjustment,
cause
manual
tnstructions
and
for personal
DANGER,
symbolz_
in instructions
A97005
.
or
Fig, 1--Mode{
38YCC
injury.
WARNING,
and (AU=
TION. These words are used with the safkty-alert
symbol. DAN=
GER identifies the most serious hazards which will result in severe
personal
inju V or death. WARNING
signifies
hazards
which
could result in personal injury or death. CAUTION
is used to
identify
injury
unsafe
practices
or product
suggestions
which
and property
which
would
damage.
will result
result
in minor
NOTE
in enhanced
personal
is used to highlight
installation,
reliability,
or operation.
Be_bre installing, modil_-ing, or servicing system, main dec=
trical disconnect switch must be in the OFF position. There
may be more than l disconnect switch. Lock out and tag
switch(es) with a suitable warning label. Electrical shock can
cause personal injury or death.
AND
_NTRODUCTION
NOTE:
tation
In some
cases
noise
A98525
RECOMMENDATIONS
has been tlaced
Fig. 2--Mode{s
to improper
of equipment
1. Locate
where
[)om windows,
unit operation
2. Ensure
sounds
decks,
diameters
7
are appropriate
refrigerant
tubes
rams
some
as
directly
as possible
by
to
avoiding
between
structure
and
unit
to
absorb
8
Manufacturer
refrigerant
robes through
or other pliable
reserves
PC 101
the right
the wall, seal opening
silicon=based
caulk.
to discontinue,
Catalog No. 533-80100
or change
that refrigerant
sun'ounds
of robing
straps
Form
or designs
38YCC-6SI
without
with water
pipes,
duct
and walls
fiom joists
and studs with a
in direct
contact
with robing.
insulation
is pliable
and con>
robe.
use hanger
to shape
hanger
robing
vapor
necessary,
tubing
that comes
straps
which
insulation.
from insulation
bent to con_bt_n to shape
at any time, specifications
Printed in USA
refrigerant
pletely
10. Isolate
(See Fig. 30
robing contact
walt studs, floors,
Ensure
confbm_
passing
with RTV
refiigerant
Do not suspend
9. When
vibration.
5. When
direct
rigid wire or strap
(See Fig, 30
and bends.
slack
Avoid
work, floor joists,
and so forth
of unit.
unnecessary
4. Leave
patios,
may distm'b customer
that vapor- and liqui&tube
capacity
3. Rnn
6
unit away
38YCG and 38YOS
instal°
notice
Pg 1
are 1 in. wide
and
(See Fig. 3.)
by using
metal
sleeves
of insulation.
and without
5-03
insurring obligations,
Replaces:
38YCC-5SI
NOTE: Avoid contact between tubing and structure
INDOOR
1
WALL
diD TUBE
C
1
INSULATION
THROUGH THE WALL
.-_
JO_ST
I
I
3/8"D
1953)
TIEDOWN
KNOCKOUTS(2) PLACES
B
SUSPENSION
.I
A94028
A94199
Fig. 3--Connecting
When
outdoor
unit
Tubing
is connected
InstNtat{on
to factory-approved
indoor
unit,
tbr operation
with
outdoor
unit contains
systen>ref?igerant
charge
indoor
unit
same
connected
of
field=supplied
tion,
check
the
on control-box
Instruction.
charge
cover
--> iMPORTANT:
Always
always
liquid-line
including
filter &ier
located
section
size is 3/%in.
filter
O.D.
for all
to Product
fi'om your
existing
on burnout
Data Digest
on any
indoor
compres=
for appropriate
distributor
part
or branch.
Step
1--Check
[ NPACK
Move
uniL
Equipment
and Job
Remove
INSPECT
EQUIPMENT
File claim
with shipping
is damaged
cartom
company
oi" incomplete,
Locate
Site
prior
It contains
information
rating
to be sure unit matches
2--_nstaH
If conditions
tie=down
or local
bolts
needed
on a Solid,
codes
should
Level
require
be used
care not to damage
to installation
unit=rating
Check
Step
plate
to properly
install
Mounting
the unit
and fastened
be attached
through
sur_ce.
Place unit above a load=bearing
and robing set tiom structure
Arrange
vibration
to building.
on level plati:orm
unit and minimize
Consult
30 x 30
6-1/2
23-1/2
20
3--Clearance
local
codes
units
exposed
to winds
above
installing,
wiring,
refrigerant
governing
in Fig
4
wall and
supporting
of
÷2 ° (+3/8
be
level
to within
specifications.
sufficient
service
end of unit and 48 in. above unit
piping,
space
and service.
%r
Allow
airflow
30=in
For proper
clearance,
clearance
airflow,
to
a 6=in.
clearance
on 1 side of unit and 12 in. on all remaining
sides must
be maintained
Maintain
a distance
of 24 in between
units.
so water,
snow,
or ice from
roof
or eaves
locate
at least
cannot
fall
on unit
applications,
unit
6 in.
above
roof
Ambients
5--Elevate
Unit
&
0
TM
Accumulation
of water
equipment
damage.
In areas where
elevate
clearance
drainage
unit
prolonged
per local
above
and
freezing
climate
estimated
ice
in base
temperatures
and code
snowfitll
pan
may
are encountered,
requirements
level
cause
and
to provide
ensure
adequate
AccuRater®
Piston
of unit
rooftop
5 mph may require
NOTE:
must
allow
to pad,
transmission
Consult
manufacturer
Requirements
knockouts
or fi'ame 6 in
wind baffles to achieve adequate defrost.
Guideline for wind=baffle
construction.
Unit
Unit to Pad
When
Step 6--Check
mounted
compressor
036=060
Step
applications.
Roof
14-318
Pad
applications,
support
18-118
Step
LOCATIONS
unit
job specifications,
above
isolate
to adequately
C
3-11116
Fig. 4--Mounting
KNOCKOUT
The minin_mn outdoor-operating ambient in cooling mode is 55°F,
and the maximum outdoor=operating arnbient in cooling mode is
125°F The maxinmm outdoor-operating ambient in heating mode
is 66°F,
if shipment
On rooftop
members
mount
B
22-1/2 x 22-1/2
Step 4--Operating
on unit=service
provided in unit base pan. Refer to unit=mounting
pattern
to detem_ine base=pan size and knockout=hole
location.
roof
unit
A
018=030
On rooftop
surface.
taking
panel
plate
TIEDOWN
directly
LNI7
to final location,
MiNiMUM
MOUNTING-PAD
DIMENSIONS
Position
BNSTALLATION
(in.)
UNiT
SBZE
of this
drier
lineset and/or
use liquid line tilter driers
number.
Obtain
Charge
of
unit opera=
information
a liquid=line
field service
Refer
15 ft
tong line applications.
install
sot replacments.
by
For proper
in the (hock
Maximum
using an existing
coil. Also,
robing
using charging
and/or
applications
---> IMPORTANT:
system
when
or fhctory=accessowrefrigerant
residential
size
Dimensions
Low=Ambient
inift)
per
indoor And Outdoor
(heck indoor-coil piston to see if it matches
shown on outdoor unit=rating plate, If it does
indoor-coil piston with piston shipped with
piston shipped with outdoor unit is correct
indoor-coil combination,
the required piston
not match_ replace
outdoor unit. The
for any approved
Table 1--Refrigerant
UMT
SiZE
Connections
UQUID
Diameter
Connection
and Recommended
Tube Diameter
Connection
Liquid- and Vapor=Tube
VAPOR
Diameter
Diameters
(In.}
VAPOR (LONG LBNE)
Connection Diameter
Tube Diameter
Tube Diameter
0t8, 024
3/8
3/8
3/4
3/4
3/4
030, 036
3/8
3/8
3/4
3/4
3/4
3/4
7/8
042, 048
O6O
3/8
3/8
7/8
7/8
7/8
1-1/8
3/8
3/8
7/8
1-1/8
7/8
1-1/8
NOTES:
1. Tube diameters are for lengths up to 50 fl or 20 fi vertical differential
2. Do not apply capillary-tube indoor cells to these units.
For tubing lengths greater than 50 fl, consult Long Line section of the Application
Guideline.
SWEAT CONNECTION
To
avoid
remove
with
equipment
indoor-coil
damage
piston
a TXV=metering
and/or
Defrost
Thermostat
(heck
defiost
thermostat
to ensure
attached
feeder
tubes,
going
there
into outdoor
is a 3/%in
tong. The det)ost
on system
it is properly
There is a liquid header
robe
per%m_ance
To avoid valve damage while brazing, service valves n-rest be
wrapped in a heat-sinking material such as a wet cloth,
7--Check
arid feeder
of
device.
Step
securely
loss
if unit is to be installed
thermostat
coil
OD.
located
retainer
be located
3 in.
2_
Locate
3, Install
on stub tube. Note
that d-iere is only 1 stub tube used with liquid header,
units it is the bottom circuit
valve.
adapter
robe shipped
strainer
in adapter
(See Fig
8--Make
Piping
(onnect
refiigerant
Connections
Service
valves
be brazed
pressure
and recover
or final unit disposal
Use
all
service
including
ports
solenoid
all refiigerant
be%re
to avoid personal
arid
open
all
injury
flow-control
system
(material
or death.
tubing
is burie&
robe
to service
provide
with unit.
robe and connect
tubing
to fittings
on outdoor-unit
vapor-
are closed
service
to service
fiom f_ctory
and ready
valve with a wet cloth,
valve
brazing
using
either
material
that melts below
S00°F).
fbr brazing.
robing
set can
silver-bearing
Do not
Consult
use soft
or
solder
local code require-
nlents,
devices,
valves.
If ANY rekigerant
in liquid-
valves
non-silver=bearing
Relieve
piston
and on most
After wrapping
repair
outdoor
5)
and liquid=service
Step
holding
with a brass distributor
At the end of 1 of the
stub robe approximately
should
Remove
plastic
service valve.
arid
Refiigerant
tubing
and indoor
This check
should
include
coil are now ready for leak testing.
all field
arid facto W joints.
PISTON
a 6 in. vertical
rise at service valve to avoid equipment
damage Ret'rigerant
robing lengths up to 36 in may be buried without
fk_rther
special consideration
local distributor.
For lengths
above
36 in,
consult
your
PISTON
PISTON
To prevent
damage
to unit
or
smaqce
valves
observe
the
RETAINER
foilowing:
*'(!sea
brazing
shield.
*Wrap service
material.
valves
Outdoor
robing
rect
package
or
or fMd-supplied
and condition.
20
per£_rmance
the
with
units may be connected
size
length
STRAINER
f_ vertical
losses
Residential
will reduce
eters
For
these
REFRIGERANT
cloth
Split-System
Refer
or
use
to indoor section
refrigerant=grade
tubing
requirements
diffkrential,
can occur.
losses.
wet
Following
Long-Line
to Table
a heat=sink
SWEAT/FLARE
using accessory=
robing
of cot=
beyond
substantial
50 ft
capacity
arid
the recommendations
in
Application
ADAPTER
A97512
Fig. 5--Liquid-Service
VNve with
Tube
Sweat-Adapter
Guideline
1 for field=robing
diam=
FINAL
TUBING
Connect robing to fittings on outdoor unit vapor- arid liquid=
smwice valves, (See Table 1) Lse refrigerant-grade robing Refer
to appropriate section below fbr type of service valves installed on
unit
TUBING
IMPORTANT:
and outdoor
not
rubbing
attention
secure
CHE(K
Check
to be certain
unit has riot shifted
against
each
other
to t'ceder robes, making
and tight
factow
during
tubing
shipment.
or any
sheet
on both indoor
Ensure
metal
robes are
Pay
close
sure wire ties on feeder robes are
Step
9--Make
Emectdcal
Connections
Use furnace
former
trans%rmer,
for control
NOTE:
Use
mum 40va
accessory
NOTE: Operation of unit on improper line voltage constitutes
abuse and could af?:_ctunit reliability. See unit-rating plate Do not
install unit in system where voltage or phase imbalance (3 phase)
may fluctuate above or below pem_issible limits.
NOTE:
unit.
Use copper wire only between
disconnect switch and
ROUTE
GROUND AND POWER WIRES
The
unit
ground
cabinet
must
to minimize
should
occur.
metal
conduit
The
have
an uninterrupted
personal
ground
when
it!jury
may consist
installed
Determine
the transtbm_er
capacity
or uffbroken
if an
electrical
of electlical
in accordance
wire
with
electrical codes. Failure to follow this warning
electric shock, fire, or death.
or
existing
can result in an
CONNECT GROUND AND POWER WIRES
may exceed
the mini-
total transformer
load-
or split the load with an
IMPORTANT: Check factow wiring and field-wire connections
to ensure tem_inations are secured properly Check wire routing to
ensure wires are not in contact with tubing, sheet metal, and so
forth
Step
10--Compressor
When
equipped
minimum
Crankcase
with a crankcase
of 24 hr before
set thermostat
outdoor
longer
Step
to OFF
Heater
heater,
starting
uniL A crankcase
nnit
_hrnish power
To _hmish
and close
heater
electrical
is required
to heater
power
a
to heater
disconnect
if refi'igerant
to
robing
is
than 50 ft
11--install
Electrical
sories
when installing.
Step
12--Start-Up
To prevent
fault
trans-
as required
Re*kr to the individual
Remove access panel and contloi box to gain access to unit wiring
Extend wires ['rom disconnect through powm-wiring hole provided
and into unit-control box
24v accessories
requirement.
tlansformer
or accessory
minimum.
FrNAL WIRING (HECK
only,
NOTE: Install branch-circuit disconnect of adequate size pc*
NEC to handle unit-starting current Locate disconnect within sight
fiom and readily accessible fiom unit, per Section 440°14 of NEC
24vi40va
of available
power
ing and increase
Be sure field wiring complies with local and national fire, safety,
and electlical codes, and voltage to system is within limits shown
on unit-rating plate. Contact local power company for con'ection of
improper voltage. See unit-rating plate _br recommended circuit°
protection device.
fan=coil trans%m_er,
power,
Accessories
instructions
compressor
packaged
damage
with
or personal
kits or acces=
injury,
observe
the fbllowing:
*Do not overcharge
system
with refi'igerant.
*Do not operate
unit in a vacuum
*Do not disable
low=pressure
In scroll compressor
applications:
*Dome
may be hot.
temperatures
or at negative
pressure.
switch
Connect ground wire to ground connection in control box for
safBty. Connect power wiring to contactor as shown in Fig. 6.
To prevent
DISCONNECT
PER N.E.C. AND/OR
LOCALCODES
clothing,
personal
injury
and gloves
when
wear
safety
handling
glasses,
refi'igerant
protective
and observe
the fbltowing:
CONTACTOR
*Back=seating
service valves are not equipped with Schrader
valves. Fully back seat (counterclockwise)
valve stem before
removing
gage=port
*Front-seating
valves,
FIELD POWER
cap.
service
valves
are
equipped
with
Schrader
WIRING
3 PHASE ONLY
BLUE
FIELD GROUND
WIRING
C)
Federal
@
GROUND
LUG
J
regulations
atmosphere.
reqt_ire that you do not vent refi'igerant
Recover
during
system
repair
or
to
final
unit
disposal
A94025
Fig. 6--Line
CONNECT
CONTROL
Rotlte
control
24v
connect
tions
packaged
Use No
along
All
wiring.
color-coded,
is located
more
the control-voltage
wire to avoid
wiring
incoming
d-_rough control-wiring
Refer
grommet
also to Installation
and
Instruc°
with them_ostat.
18 AWG
thermostat
moisture
WIRING
wires
leads to control
If refrigerant
robes or indoor coil are exposed to atmosphere,
must be evacuated
to 500 microns to eliminate contamination
Power Connections
excessive
must
power
than
wires,
be NEE
leads
(lass
in the system.
these
1. Fully
steps to properly
back seat (open)
2. [?nit is shipped
insulated
voltage
Follow
(35°C
100 ft front
use No
minimum)
unit,
16 AWG
wire. If
as measured
color-coded
drop.
1 and mnst
caps
fi'om
installed.
start up the system:
liquid-
witia valve
Replace
and vapor-robe
stem(s)
stem caps
electrical
disconnects
4. Set room thermostat
is below
indoor
to energize
to desired
ambient
system
valves.
(closed)
and
is opened
and tighten
m
with
system.
temperature.
temperature.
service
fi'ont seated
after
refiigerant
flow. Replace caps finger-tight
wrencia an additional
1/12 ram.
3. (;lose
be separated
tiaey
and
Be sure set point
TYPICAL
FAN COIL
HP THERMOSTAT
HEAT
PUMP
m
24 VAC
HOT
24 VAC
COM
D
......
HEAT
STAGE
i
2
COOL/HEAT
STAGE 1
INDOOR FAN
RVS COOLING
EMERGENCY
HEAT
* IF AVAILABLE
Fig. 7--Generic Wiring Diagram
(See Thermostat Installation Instructions
for wiring specific unit combinations.)
-->
A02325
LEGEND
24-V FACTORY
WIRING
24-V FIELD WIRING
FIELD SPLICE
CONNECTION
ODT
OUTDOOR
THERMOSTAT
EMERGENCY
SUPPLEMENTAL
5. Set room thermostat
or AUTO
mode,
minutes.
to HEAT
as desired.
Check
or (OOL
Operate
system=refi'igerant
and _im control
to ON
unit for a minimum
of 15
charge.
HEAT RELAY
HEAT
RELAY
a correct
relationship
air temperature
temperature
To avoid equipment
damage ensure compressor
rotation
cotTect*3=phase
scroll compressors
are rotation sensitive
*A flashing
LED on phase
(See Fig. 8 and Table
This wil! not allow
monitor
13--Check
and
interchange
1. Securely
2 field-wiring
2. Tighten
3. Leave
charge
and
charge
may
in accordance
re['rigerant
during
charge.
heating
with unit rating
or below
and
season,
plate +06
15 f_ respectively.
Before
fasten
leaving
on unit-rating
plate.
To check
Procedure
charge
on unit wiring
in
and
all panels
job, be sure to do the _bllowing:
service
User's
and covers.
valve-stem
Manual
maintenance
4. Fill out Dealer
file.
caps to li12=turn
past finger-tighL
owner.
system
with
Explain
requirements
outlined
Checklist
and place
Installation
operation
in manual.
in customer
label.
COOLING=ONLY
NOTE:
PRO(
If superheat=
favorable,
charge
+0.6
ozift
SEQUENCE
EDURE
or subcooling=charging
must be weighed
of
3/8-in
conditions
in accordance
liquid
line
above
are not
or
below
15
ft
supplied
to indoor
R=G_ Circuit
To calculate
additional
15 ft
charge
required
10 _ X 0.6 ozift
for a 25=ft line set:
6 oz of additional
HEATING
CHECK-CHART
PRO(EDURE
To
system
dnring
Check
operation
Chart on outdoor
unit
heating
charge
refer
This chart indicates
to the
On 3-phase
equipped
with a phase
con'ectly
phased
whether
circuit.
ing indoor-blower
nnits,
trans_brmer
circuits
valve,
R-O,
switching
with scroll compressors,
monitor
to detect
[br compressor
contactor,
R-G energizes
motor
makes
reversing
models
R-Y energizes
compressor
thermostat
R-O energizes
position.
circuit
cycle,
and ontdoor
is
Cooling
On a call t'or cooling,
EXAMPLE:
check
With power
OF OPERATION
energized.
with unit-rating
respectively
Heating
pressure
If pressure
system=refi'igerant
necessaL'v
line above
units
Checks
and periodic
mode, re*_r to Cooling=Only
25 ft
liquid
14--Final
IMPORTANT:
cooling
plate
Step
is
must be weighed
ozit't of 3/%in.
rotation
Charge
is shown
charging
operating
to be energized.
Factory
charging
reverse
2.)
contactor
*Disconnect
power to unit
leads on unit contactor.
Step
indicates
system
and outdoor
Do not use chart to adjust
When
charge
is
between
indoor
do not match on chart,
not be con'ect
NOTE:
exists
entering
If phasing
starting
outdoor-fan
indoor
unit=blower
and
the units are
if the incoming
operation.
on high speed.
R-Y,
it to cooling
power
is
is correct,
motor
relay,
and
start-
NOTE:If thephasing
is incorrecL
thecontactor
will not
energizeE
To correct the phasing,
interchange
power connections
on the field side.
When
themlostat
is satisfied,
contactor
and blower
NOTE:
If indoor
the blower
its contacts
relay.
open,
Compressor
unit is equipped
runs an additional
be
any 2 of the
de-energizing
and motors
_>
E_
O1
c_ usx-,( 1A
the
should
with a timeodelay
90 sec to increase
H9C1
3
K1
J_
O0
"U
stop.
relay circuiL
system
efficiency.
Heating
On a call for heating,
thermostat
phasing
circuit
is
correcL
outdoor-fan
blower
motor
relay,
---> Should
makes
R-¥
and compressor.
starting
temperature
circuits
energizes
Circuit
blower
motor
continue
to
(field-installed
Remaining
when
outdoor
When
option),
bank
fall,
thermostat
coatactor
RoG energizes
R-W2
indoor<
is made
through
RoW2 energizes
relays,
If outdoor thermostat
is
electric
f_lls below
is satisfied,
and relays.
OF2
only the first bank will be energized.
of supplemental
temperature
If
starting
on high speed.
second-stage
room thermostat.
(ircuit
bringing
on supplemental
electric heat.
used
RoY and R-G.
coatactor,
its
All heaters
heat
outdoor
contacts
will be energized
thermostat
open,
and motors
setting.
de-energizing
should
stop.
Defrost
The def?ost
control
fieldoselectable
between
minutes.
is a time/temperature
(quick-connects
def?ost
cycles
mode
is identical
motor
stops
and
warming
energized
to cooling
secondostage
conditioned
space.
the
cycle
defi'ost
at board
(30, 50, or 90 minutes),
Defrost
---> Initially
control
located
and a 24v signal
mode
heat
is
defrost,
be accomplished
includes
a
factory
set at 90
except
that outdooro£m
turned
on
is present
the defi'ost
DFT_?
TI CC
starts
when
the
contactor
on the T1 terminal.
thermostat
times
OF
]pl
_1
_
D
_
DI
1
is
Then the
out (30, 50, 90
C
must be closed.
A02001
This can
TaNe 3--Defrost
to outdoor
J2_
O
30 50 90
to continue
as %llows:
1. Turn off power
_;2
h_
timer
defrost cycle begins when the cycle timer
rain) and the defi'ost thermostat is closed.
To initiate
which
edge) time period
Control Speedup-Timing
Sequence
unit.
NBNhqlUM
{MINUTES}
PARAMETER
MAXmMUM
{_',_NUTES)
SPEEDUP
(NONRNAL)
CONTACTOR
30-minute
cycle
27
33
7 sec
50-minute
cycle
45
55
12 sec
90-minute
cycle
81
99
21 sec
10-minute
cycle
5 minutes
9
4.5
11
5.5
2 sec
1 sec
Fig. g--Defrost
2. Disconnect
board.
4. After
0 0
o
5. Short
L1
A00010
TaNe 2--Phase-Monitor
LED Indicators
LED
OFF
STATUS
No call for compressor
operation
FLASHING
ON
Fig. 8--Phase-Nonitor
Reversed phase
Normal
Control
a few minutes
should drop below
proximately
30°F).
between
motor
Tape
3. Restart unit in heating
outdoor coil
OFF,NO
24VAC
ON:OK
FLASH
_PHASE
PROBLEM
L3
outdoor-_im
(See Fig..)
Control
mode,
allowing
in heating
closing
speed-up
mode,
point
tem_inals
you
screwdriver
nom_al
hear
reversing
immediately;
10-minute
defrost
valve
othepxise,
cycle
on control
OF2
grounding.
frost to accumulate
liquid-line
of defl'ost
&iver. (See Fig. 9.) This reduces
1/256th of original time. (See Table
6. When
fi'om
lead
lead to prevent
temperature
thermostat
with a flat-bladed
the
3.)
change
timing
in approximately
(ap-
screw-
sequence
position,
contlot
on
will
to
remove
tem_inate
2 sec.
NOTE:Length
ofdefiost
cycleisdependent
uponlength
oftime
ittakes
toremove
screw&iver
flora test pins after reversing valve
has shifted.
CARE
For continuing
ment
7. Unit will remain
or until defrost
temperature
in defi'ost for remainder
thermostat
of liquid
8. Turn off power
of defrost-cycle
at approximately
time
board.
unit and reconnect
high per%finance
periodic
maintenance
and to minimize
must
possible
be per_brmed
equipon this
equipment
Frequency
(See Fig. 9.)
MAINTENANCE
80°F coil
line.
to outdoor
to OF2 on control
reopens
failurQ
AND
fanomotor
lead
areas,
of maintenance
such as coastal
may vary depending
applications.
upon
geographic
Copyright
2003
CARRIER
Manufacturer
B°°kLL_
Tab
15al 5a
reserves
PC
101
Corp.,
the
7310
right
Catalog
W.
Morris
St
to discontinue,
No
533-80100
• Indianapolis,
or
change
IN 46231
at any
Printed
time,
in USA
38ycc6si
specifications
Form
or designs
38YCC-6SI
without
notice
Pg 8
and
without
5-03
incurring
obligations,
Replaces:
38YCC-5SI