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Turn to the Expertg
Installation
Instructions
NOTE:
Read the entire instruction manual before starting the
installation.
NOTE:
Installer: Make sure the Owner's Manual and Service
Instructions are left with the unit after installation,
TABLE
OF CONTENTS
PAGE
SAFETY CONSIDERATIONS
.........................
1
INTRODUCTION
...................................
2
RECEIVING AND INSTALLATION .................
2-16
Check Equipment ..................................
2
Identify Unit ....................................
2
Inspect Shipment .................................
2
Provide Unit Support ...............................
2
Roof Curb ......................................
2
Slab Mount .....................................
2
Ground Mount ..................................
2
Provide Clearances .................................
2
Rig and Place Unit .................................
2
Inspection ......................................
2
Installation ......................................
2
Select and Install Ductwork ...........................
5
Converting Horizontal Discharge Units to Downflow
(Vertical) Discharge Units ..........................
7
Provide for Condensate Disposal ......................
7
Install Electrical Connections .........................
7
High-Voltage Connections .........................
8
Routing Power Leads into Unit ......................
8
Connecting Ground lead to Ground Lug ...............
8
Routing Control Power Wires (24-v) .................
8
Easy Select _ . ...................................
9
50XZ Sequence of Operation ......................
15
Special Procedures for 208-V Operation ..............
16
PRE-START-UP
...................................
16
START-UP .....................................
16-19
50XZ Start-Up ...................................
16
Check for Refrigerant Leaks .........................
17
Start-Up Adjustments .............................
17
Check Cooling & Heating Operation .................
17
Checking & Adjusting Refrigerant Charge ............
18
Refrigerant Charge ..............................
18
No Charge .....................................
18
Low Charge Cooling .............................
18
To Use Cooling Charging Charts ....................
18
Indoor Airflow & Airflow Adjustments ..............
18
Defrost Control ...................................
19
Quiet Shift .....................................
19
Defrost .......................................
19
MAINTENANCE ................................
20-25
Air Filter ........................................
20
Indoor Blower and Motor ...........................
20
Outdoor Coil, Indoor Coil, & Condensate Drain Pan ......
20
Outdoor Fan .....................................
23
Electrical Controls and Wiring .......................
23
Refrigerant Circuit .................................
23
C99088
Fig. 1 - Unit 50XZ
Indoor Airflow ...................................
Metering Devices- TXV & AccuRater
Piston ..........
Pressure Switches .................................
Loss of Charge Switch .............................
High Pressure Switch ..............................
Copeland Scroll compressor (Puron Refrigerant) .........
Refrigerant System ................................
Refrigerant ....................................
Compressor Oil .................................
Servicing Systems on Roofs with Synthetic Materials ....
Liquid Line Filter Drier ...........................
Puron® (R-410A) Refrigerant Charging .............
System Information ................................
Loss of Charge Switch ............................
Check Defrost Thermostat .........................
TROUBLESHOOTING
..............................
START-UP CHECKLIST ............................
TM
SAFETY
Improper
installation
23
23
24
24
24
24
24
24
24
24
25
25
25
25
25
25
25
CONSIDERATIONS
adjustment,
alteration,
service,
maintenance,
or use can cause explosion,
fire, electrical
shock,
or other
conditions
which may cause death, personal injury, or property
damage.
Consult a qualified
installer,
service agency, or your
distributor
or branch for information
or assistance. The qualified
installer or agency must use factory-authorized
kits or accessories
when modifying
this product Refer
packaged with the kits or accessories
to the individual
when installing.
instructions
Follow all safety codes. Wear safety glasses, protective
clothing,
and work gloves. Use quenching
cloth for brazing
operations.
Have
a fire extinguisher
available.
thoroughly
and follow
all warnings
Read
these
or cautions
instructions
included
in
literature
andattached
to the
current
editions
In Canada
unit. Consult
of the National
refer to the current
local building
Electrical
editions
Code (NEC)
codes, the
NFPA
of the Canadian
70.
electrical
Code CSA C22A.
Recognize
safety
IMPORTANT:
The gasketing
for a watertight
seal. Install
roof curb. Improperly
of the unit to the roof curb is critical
gasketing
applied
material
gasketing
supplied
with the
also can result in air leaks
and poor unit performance.
information.
This is the safety-alert
symbol
/_.
When you see this symbol on the unit and in instructions
or
manuals, be alert to the potential
for personal injury. 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 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
which
will result in enhanced installation,
reliability, or operation.
Curb should be level to within 1/4 in. (3 m) (See Fig. 6). This is
necessary
for unit drain to function
properly. Refer to accessory
roof curb installation
instructions
for additional
information
as
required.
SLAB
MOUNT
Place the unit on a solid, level concrete
pad that is a minimum
except
when required
GROUND
by local codes.
MOUNT
The unit may be installed
either
on a slab or placed directly
ground
if local codes permit. Place the unit
prepared with gravel for condensate
discharge.
ELECTRICALSHOCK
Failure to follow
injury or death.
HAZARD
this warning
could
result
in personal
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.
of 4
in. (102 mm) thick with 2 in. (51 mm) above grade (See Fig. 7).
The slab should extend approximately
2 in. (51 mm) beyond the
casing on all 4 sides of the unit. Do not secure the unit to the slab
on
on the
level
ground
Step 3 --
Provide
Clearances
The required
3. Adequate
minimum
ventilation
service clearances
are shown in Fig. 2 and
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
under a partial overhang
in.
(1219 mm) above
obstruction.
The minimum
clearance
(such as a normal house overhang)
is 48
the unit top. The maximum
horizontal
extension of a partial overhang must not exceed 48 in. (1219 mm)
IMPORTANT:
Do not restrict outdoor airflow. An air restriction
FIRE,
EXPLOSION,
CARBON
MONOXIDE
Failure to follow this
injury, death or property
ELECTRICAL
POISONING
warning
damage.
could
SHOCK
HAZARD
result
AND
at either
in personal
A
qualified
installer
or
agency
must
use
factory-authorized
kits or accessories
when modifying
product.
50XZ
heat
pump
is fully
and designed
for
outdoor installation.
(See Fig. 1) Standard units are shipped in a
horizontal-discharge
configuration
for
installation
on
a
groundlevel
slab. Standard
units can be converted
to downflow
(vertical)
discharge
configurations
RECEIVING
for rooftop
AND
inlet
or
the
fan
discharge
applications.
The unit model number and serial number are stamped on the unit
identification
plate.
Check
this information
against shipping
Rigging
many
and
reasons
structures,
handling
due
of this equipment
to the
installation
can
be hazardous
location
(roofs,
qualified crane operators
and install this equipment.
and ground
support
Follow
gloves.
all applicable
safety
codes.
Wear safety
shoes
and straps should be visually inspected for any damage,
of wear, structural
deformation,
or cracks. Particular
should be paid to excessive wear at hoist hooking points
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
Forward
claim
papers
directly
to transportation
Manufacturer
is not responsible
for any damage incurred
leave
Step 2 -- Provide
ROOF CURB
Install accessory
all
parts
in
original
removal.
company.
in transit.
notify the
To prevent
packages
until
Unit Support
roof curb in accordance
staff
and work
INSPECTION
Prior
loss or damage,
installation.
for
elevated
etc.)
Only trained,
should handle
INSPECT SHIPMENT
against shipping
list. Immediately
distributor
if any item is missing.
units
water
Rig and Place Unit
papers.
all items
equipment
be
When working
with this equipment,
observe precautions
in the
literature,
on tags, stickers, and labels attached to the equipment,
and any other safety precautions
that might apply.
INSTALLATION
Step 1 -- Check Equipment
IDENTIFY UNIT
Check
nearest
may
life.
carpeting
or other combustible
materials.
Slab-mounted
should be at least 4 in. (102 mm) above the highest expected
and runoff levels. Do not use unit if it has been under water.
only
this
Step 4 --
self-contained
outdoor-air
to compressor
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
INTRODUCTION
The
the
detrimental
to initial
use, and at monthly
intervals,
all rigging
brackets
evidence
attention
and load
support areas. Brackets or straps showing any kind of wear in these
areas must not be used and should be discarded.
INSTALLATION
1. Remove unit from shipping carton. Leave top shipping skid
on the unit as a spreader bar to prevent the rigging straps
from damaging
use a spreader
the unit. If the wood skid is not available,
bar of sufficient length to protect unit from
damage.
2. Position
with instructions
with curb (See Fig. 5). Install insulation,
cant strips,
flashing. Ductwork must be attached to curb.
shipped
roofing,
and
the lifting bracket
assembly
unit. Be sure the strap does not twist.
around
the base of the
3OXZOR4
5460
861
[359]
UNIT
ELECTRICAL
CHARACTERISTICS
UNIT
208
230
I 60
WT
UNIT
KG
IIAII
5
DO]
Z
320
1451
940313702]
3683[145]
4064[160]
3 60
360
1633
991113902]
5588[220]
3874[153]
4470[176]
50XZO38
208/230
I 60,
2031230
3 60
403
1828
1041R[4102]
50801200]
3556[140]
4470[176]
WEIGHT
....
2
CLEARANCES TO COMBUSTIBLE MATL.
LBS/HG
....
3
....
581263
34/243
731341
133/604
030
89/313
37/259
86/390
1481672
036
83/377
62/281
96/436
162/735
MILLIMETERS
[IN]
355 6 [1400]
508
[2 00]
355 6 [14 O0]
127
[OBO]
9144
[3600]
TOP OF UNIT .............................
DUCT SIDE OF UNIT ............................
SIDE OPPOSITE DUSTS ........................
BOTTOM OF UNIT ...................................
ELECTRIC HEAT PANEL ................................
4.
024
NEC. REQUIRED CLEARANCES
MILLIMETERS
[IN]
BETWEEN
UNITS, POWER ENTRY SIDE .................
I066 8 [42 00]
UNIT AND UNGROUNDED
SURFACES,
POWER ENTRY SIDE ........
9140
[3600]
UNIT AND BLOCK OR CONCRETE WALLS AND OTHER
GROUNDED SURFACES, POWER ENTRY SIDE ..................
10668
[4200]
REG_RED
CLEARANCE FOR OPERATION AND SERVICING
Y
EVAP COIL ACCESS SIDE .....................
POWER ENTRY SIDE
............................
(EXCEPT FOR NEC REQUIREMENTS)
UNIT TOP ...........................................
SIDE OPPOSITE DUCTS ....................................
DUCT PANEL ..............................................
@
ml
COIL
OUTDOOR
MMIIN
Y
2031230
T
INDOOR
GRAVITY
I 60,
III
It
OF
2031230
CORNER
,t06
[16
CENTER
53XZO30
REO_RED
705
[878]
HEIGHT
LBS
_MINIMUM
MILLIMETERS
[IN]
91_0
[36 OO]
91_0
[3600]
91_0
9140
3048
[3600]
[3600]
[12DO]+
DISTANCES:IF
UNIT IS PLACED LESS THAN 3048
[1200]
FROM WALL
SYSTEM,THEN
SYSTEM PERFORMANCE
MAYBE COMPROMISED
DIMENSIONS
I
IN [] ARE
IN
INCHES
TOP VIEW
I
_7985
11939
[4700]
[31 44]
t
FIELD ENTRY_
SERVICE
FULL
PORTS
I
LOUVER
o,
FULL
LOUVER
=
_°
,_FULL
A
222
LOUVER
_ii°
t
[088]
DIA
HOLE
CONTROL
ENTRY_
N
4020
[1583]
\
5703
[2245]
/
t
n
I
m
_
2762
[1087]
117 !
[463]
[530]
_COMPRESSOR,
BLOWER,
& ELECTRICAL
o
°
1
[O2O]
ACCESS
ELECTRIC
PANEL
[1285]
>
RETURN
DUCT
OPENING
_BO
871
[343]
LEFT SIDE VIEW
SUPPLY
DUCT
_ •
X
13
427
[I 68]
8310
[3272]
•
FULL_O_
LOUVER....
OPENING
Z
,
[285]
_'-_-_
mm_
_
5 [I 75] DIA
POWER ENTRY
KO
HEAT
1222
[481]
88
[3
3
48]
_
_5505
[2167]
PaR6
[983]
2496
[985]
12263
[4828]
FRONTVIEW
RIGHT SIDE VIEW
REAR VIEW
3DXZBDO22R
/%
UNIT
ELECTRICAL
CHARACTERISTICS
UNIT
WT
LBS
HG
UNIT
HEIGHT
CENTER
208
230
I 60,
208/230
3 60
4Sa
206
10917[4298]
50XZO48
208
230
I 60,
208/230
3 60
479
217
11425[4_983
4953[1953
SOXZO6O
208
230
I 60,
208/230
3 60
499
226
1193
5334[21
III
....
WEIGHT
2
REQUIRED CLEARANCES
LBS/KG
....
3
....
411
042
961436
591268
124/563
175/795
048
1021463
651295
131/595
1811822
000
107/486
70/318
136/617
186/844
MM/IN
Y
50XZO42
CORNER
OF GRAVITv
"A"
Z
4476[176]
3[4698]
_572[180]
4476[1763
O]
5080[20
4572[1803
O]
4_20[17,6]
TO COMBUSTIBLE MATL.
MILLIMETERS
[IN]
3556
[1400]
508
[200]
355 6 [14 003
127
[0 50]
9144
[3600]
TOP OF UNIT ........................................
DUCT SIDE OF UNIT ..............................
SIDE OPPOSITE DUCTS .......................
BOTTOM OF UNIT ...........................
ELECTRIC
HEAT _ANEL .....................................
[16 01]
NEC. REQUIRED CLEARANCES.
MILLIMETERS
[IN]
10658
[4200]
9140
[3600]
BETWEEN UNITS,
POWER ENTRY SIDE .......................
UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE ........
UNIT AND _LOCK OR CONCRETE WALLS AND OTHER
GROUNDED SURFACES,
POWER ENTRY SIDE ...........
REQUIRED CLEARANCE
10668
MILLIMETERS
[IN]
9140
[3600]
9140
[3000]
EVAP COIL ACCESS SIDE ..................................
°OWER ENTRY SlOE ........................................
(EXCEPT FOR NEC REQUIREMENTS)
UNIT TOP ..................................
SIDE OPPOSITE DUCTS ......................
DUCT PANEL
............................
INDOOR
[4200]
FOR OPERATION AND SERVICING
9140
9140
3048
[3600]
[3600]
[1200]_
COIL
_MINIMUM
[_
OUTDOOR
/
Q
DISTANCES:IF
D
COIL _VI
UNIT IS
SYSTEM,THEN
PLACED LESS THAN 3048
[1200]
FROM WALL
SYSTEM PERFORMANCE
MAYBE COMPROMISED
DIMENSIONS
IN [] ARE
IN
INCHES
I
TOP VIEW
&
11939
[4700]
10906
[4294]
FIELD
r_
SERVICE
FULL
ENTRY_
FORTS
i
I
/
230
E091]
LOUVER
FULL
LOUVER
.,_j
_°
75]
445
[I
T
LOUVER
m
DIA
HO
POWER ENTRY_
t
5292
:2442]
FULL
402
[15
t
0
83]
SUPPLY
DUCT
RETURN
DUCT
•
.
OPENING
326 I
[1284]
1177
[4 63]
427
•
[168]
DRAIN OUTLET
190
[075]
NPT
X 220
[088]
DP
_x
COMPRESSOR,
BLOWER,
& ELECTRICAL
_4
ELECTRIC
HEAT
ACCESS PANEL
[1295]
11231
[4422]
LEFT SIDE VIEW
o>
2
2
I
12263
[4828]
FRONT VIEW
I
[0
869
[342]
IR20
[481]
[088]
OlA
CONTROL ENTRY
16]
.___J__
I
[343]
_3512
_
_B51
[1383]
RIGHT SIDE VIEW
--4.
_3413
E1367]
_872
HOLE
1
2
[1383]
'_
REAR VIEW
[
D
rev
50XZSOO183
1
2
Y
C00071
RIGGING
WEIGHTS
(SMALL CABINET)
024
Unit
Rigging
Weight
RIGGING WEIGHTS (LARGE CABINET)
030
036
042
Ib
kg
Ib
kg
Ib
kg
Unit
331
150
371
168
414
188
Rigging
Weight
Fig. 4 - Rigging
3.
Place each
of the 4 metal
holds in the composite
strapping
a. Open lever of tension
c. Pull strapping
into the rigging
around
bottom
(ratchet
type).
through
tension
buckle
perimeter
as shown
tension buckle
field-supplied
safety latch, lift lever,
clevis or hook
in Fig.
When
8. Position
lifting
of sufficient
brackets
Failure to follow
injury or death.
strength
to
the
unit's
center
of
gravity.
9. Lift unit. When
unit is directly
the 2 safety straps. Lower
10.
After the unit is placed
ductwork
90
approximately
4
The design
and installation
of the duct system
must be
accordance
with the standards
of the NFPA for installation
conditioning
NFPA
ductwork,
consider
openings
the following:
heaters
warning
could
result
in personal
the unit and the conditioned
cannot
be
and density
falling
installed,
should
90 degree
a grille
be installed
into the conditioned
require
space. If a
then
of
to prevent
space. Units with
elbow in supply
duct.
1. All units should have field-supplied
filter rack installed
in the return-air
Recommended
and
ventilating
90B and/or
filters
side
sizes for filters are shown
or accessory
of the unit.
in Table
1.
2. Avoid abrupt duct size increases
and reductions.
change in duct size adversely affects air performance.
IMPORTANT:
unit
Use
to prevent
ensure
weather
installed,
flexible
connectors
transmission
tight
use fireproof
and
between
of vibration.
airtight
canvas
seal.
(or similar
ductwork
Use suitable
When
heat
Abrupt
to
heat
is
electric
resistant
and
gaskets
material)
connector
between
ductwork
and unit discharge
connection.
If
flexible duct is used, insert a sheet metal sleeve inside duct. Heat
Step 5 -- Select and Install Ductwork
air
strength
from
pad,
in. (102 mm) down the tube sheet. The wire tie to be cut on
the right is located approximately
6 in. (152 mm) down the
tube sheet.
type
and return-air
and return units, tools or parts could
Install a 90 degree turn in the return
elbow
electric
onto the roof curb.
on the roof curb or mounting
assembly must be cut. Remove the left
panels and corner post to access wire ties.
NFPA 90A or residence-type,
ordinances.
Heating,
recommendations.
over the roof curb, remove
the equipment
The wire tie to be cut on the left is located
non-residence
air grilles
of
HAZARD
this
between
degree
objects
remove the top crating. On 50XZ060 units only, 2 wire ties
fastened
to
the
outdoor
coils
and
reversing
valve/accumulator
and front louver
INJURY
For vertical supply
drop into ductwork
sufficient
over
Engineers)
on the supply-
and installing
PERSONAL
(See Fig. 9)
directly
designing
and return
Society
To
(See Fig. 9).
point
registers,
(American
and Air Conditioning
and
7. Attach the 2 safety straps directly to the clevis or hook at the
4 rigging brackets. DO NOT attach the safety straps to the
lifting brackets
Refrigeration,
supply-air
ASHRAE
unit taut.
5. Tighten the tension buckle until it is taut. Lifting
must be secure in the rigging holds.
hole in the lifting bracket.
to
The unit has duct flanges
on the side of the unit.
to lock strap in tension buckle.
release strapping, squeeze
pull webbing outward.
6. Attach
Select and size ductwork,
of
060
Weights
according
buckle
through
d. Snap lever down
brackets
unit base.
4. Thread lifting bracket
unit as follows:
b. Feed strapping
8.
lifting
048
in
of
systems,
local codes
and
resistant
duct connector
(610 mm) from electric
(or sheet metal
sleeve)
3. Size ductwork for cooling air quantity
air quantity for proper electric heater
Table
below
must extend
24-in.
heater element.
2. Heater limit switches
those recommended.
may
(cfm). The minimum
operation
is listed in
trip
at air quantities
/
/
/
base
,,,_crew'_._
/
(NOTEA)
_
*Gasketin;..._
_
I
II1_11t
Flashing field
I
supplied _
_n_il_
Roofcurb*
II_i;llltJ
\
_,
field supplied
Roof
Curb
for Small
II ii l"
Roofing matei'at
\
/l_!i:llll _
Duct we rk
field supplied
c__tllt
Cabinet
Roof Curb for
Note A:When unit mounting screw is used
retainer bracket must also be used.
Supply
(BxC)
Note
Insulation(field
supplied)
j
/
Large Cabinet
A:When
unit mounting
screw is used
retainer bracket must also be used.
opening
\/
R/A
S/A
_
Gasket around \.
duct
/
Insulated
deck pan
/2
\
Gasket around
outer edge \
\\
\
C00076
UNIT SIZE
50XZ024-036
50XZ042-060
ODS CATALOG
NUMBER
A
IN. (MM)
B
IN. (MM)
CPRFCURB006A00
8 (203)
11 (279)
16-1/2
(419)
28-3/4
CPRFCURB007A00
14 (356)
11 (279)
16-1/2
(419)
28-3/4
17-3/8
17-3/8
(441)
(441)
CPRFCURB008A00
CPRFCURB009A00
8 (203)
14 (356)
16-3/16
16-3/16
NOTES:
1. Roof curb must be set up for unit being installed,
2. Seal strip must be applied, as required, to unit being installed.
5. Roof curb is made of 16-gauge
steel,
6. Attach ductwork to curb (flanges of duct rest on curb).
7. Insulated panels: 1 -in. (25 mm) thick fiberglass 1 Ib (.45 kg) density.
8, When unit mounting screw is used (see Note A), a retainer bracket must
be used as well. This bracket must also be used when required by code for
hurricane or seismic conditions. This bracket is available through Micrometl.
Fig. 5 - Roof Curb
Dimensions
(411 )
(411)
C
IN. (MM)
D
IN. (MM)
(730)
(730)
40-1/4
(1022)
40-1/4
(1022)
2. Remove horizontal duct covers to access bottom return and
supply knock out panels.
3. Use a screwdriver and hammer to remove the panels in the
bottom of the unit base.
NOTE:
These panels are held in place with tabs similar to an
electrical knockout.
MAXIMUM ALLOWABLE
DIFFERENCE in. (mm)
B
4. Reinstall the horizontal duct covers (Fig. 11) to block off
the horizontal air openings.
A-B
B-C
ArC
1/4 (6.35)
1/4 (6.35)
1/4 (6.35)
NOTE: Avoid abrupt duct size increases and reductions. Abrupt
change in duct size adversely affects air performance.
A07925
Fig. 6 - Unit Leveling
IIIII
OPEN'NGt
/'
[[[
I_l
IIIII
IIIII
IIIII
\
IIII
2"
(50.8ram)
±
EVAR COIL
COND. COIL
A07926
Fig. 7 - Slab Mounting Detail
oo
FEED
C99067
Fig. 8 - Threading Belt
4. Seal, insulate, and weatherproof all external ductwork. Seal,
insulate and cover with a vapor barrier all ductwork passing
through conditioned spaces. Follow latest Sheet Metal and
Air 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 wall or roof
according to good construction practices.
CONVERTING
HORIZONTAL
DISCHARGE
UNITS
TO DOWNFLOW
(VERTICAL)
DISCHARGE
Provide
for Condensate
UNITS
The 50XZ units dispose of condensate 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. (25 mm) lower than the
drain-pan
condensate connection to prevent the pan from
overflowing. Prime the trap with water. When using a gravel apron,
make sure it slopes away from the unit.
If the installation requires draining the condensate water away from
the unit, install a field-supplied 2 -in. trap at the condensate
connection to ensure proper drainage. Condensate trap is available
as an accessory or is field-supplied. Make sure that the outlet of the
trap is at least 1 in. (25 mm) 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. (51 mm) trap. (See Fig. 12) Do not undersize the tube. Pitch
the drain trough downward at a slope of at least 1 in. (25 mm)
every 10 ft (3 m) of horizontal run. Be sure to check the drain
trough for leaks. Prime the trap at the beginning of the cooling
season start-up.
Step 7 --
UNIT
Install Electrical
COMPONENT
1. Make
all electrical
ANSI/NFPA
governing
connections
C22.1
Canadian
3. Be sure
operating
HAZARD
Failure to follow this warning could result in personal iniury
or death.
Before installing or servicing system, always turn off main
power to system.
There may be more than one disconnect
switch.
1. Open all electrical
work.
disconnects
before
starting
any servace
could result in damage
connections
in accordance
Electrical
Code
Refer to unit wiring
copper
conductor
field-supplied
electrical
NOT USE ALUMINUM
SHOCK
HAZARD
to the unit
with NEC
70 (latest edition) and local electrical codes
such
wiring.
In Canada,
all electrical
must be in accordance
with CSA standard
local codes.
only
Connections
DAMAGE
Failure to follow this caution
being installed.
2. Use
ELECTRICAL
Disposal
NOTE: Ensure that condensate-water disposal methods comply
with local codes, restrictions, and practices.
Tolerances
ill_
RETURN
AIR
IIIII
IIII|
III1!
IIIII
....
Step 6 --
Part 1 and applicable
diagram.
for connections
disconnect
WIRE.
switch
between
and unit. DO
that high-voltage
power
to unit is within
voltage range indicated on unit rating plate. On
3-phase
units, ensure phases
are balanced
within
percent. Consult local power company for correction
improper voltage and/or phase imbalance.
2
of
4. Insulate low-voltage
wires for highest voltage contained
within conduit when low-voltage
control wires are in
same conduit
as high-voltage
5. Do not damage
internal
through any panel to mount
etc.
wires.
components
when
electrical hardware,
drilling
conduit,
DETAIL A
SCALE 0.250
TIGHTEN
STRAPPING
SECURELY
WITH TENSION
BUCKLE
INSTALL
RIGGING
SEE DETAIL
SAFETY
CLEVIS
STRAPS TO
AT 4 RIGGING
BRACKETS
PLACE RIGGING
BRACKET
ASSEMBLY
IN 4
HAND HOLES AND INSTALL TIE DOWN STRAP
AROUND
PERIMETER
OF UNIT AND THROUGH
SPACE IN BRACKET
ASSEMBLY
A
C99075
U NIT 50XZ
A
B
in,
19.0
19.0
20.0
20.0
20.0
2t .0
024
030
036
042
048
060
in,
18.25
18.25
19.0
2t .25
2t .25
20.0
mm
482.6
482.6
508.0
508.0
508.0
533.4
Fig. 9 - Suggested
Rigging
ROUTING
ELECTRICAL
SHOCK
could result in personal
Run the high-voltage
injury
Association
(latest edition) (in Canada, Canadian
Code CSA C22.1) and local electrical codes.
The
unit
must
have
separate
3-phase
wires.
service
with
a
for wire sizing.
The field-supplied
disconnect
may be mounted
the high-voltage
inlet hole (See Fig. 2 and 3).
on the unit over
If the unit has an electric heater, a second
disconnect
required.
Consult
the
Installation,
Start-Up,
and
Instructions
connections.
Operation
provided
with
the
accessory
for
may be
Service
electrical
on improper
may cause unit damage
line voltage
that could
constitutes
service
affect warranty.
abuse
entry knockout
on
connect
splice box (See Fig. 13 through 17). For
leads to the black and yellow wires; for
the leads
GROUND
to the black,
LEAD
and
CONTROL
POWER
low-voltage
hole provided
The
unit
transformer
supplies
power
LUG
(24-V)
unit control
thermostat
24-v
and blue
lead to the chassis
leads before
leads through
in unit into
box. (See Fig. 2 and 3) Connect
power leads as shown in Fig. 15.
yellow,
TO GROUND
WIRES
Form a drip-loop
with the thermostat
into the unit. Route the thermostat
routing them
grommeted,
power
splice
leads to unit control
for complete
system
including
accessory
electrical heater. An automatic-reset
circuit
breaker (See Fig. 17) is provided
in the 24-v circuit; see the
caution label on the transformer
or Fig. 18. Transformer
is factory
wired for 230-v
operation.
If supply voltage is 208-v,
rewire
transformer
primary as described in Special Procedures
for 208-v
Operation
of unit
UNIT
Refer to Fig. 15 and 16. Connect the ground
using the ground lug in the wiring splice box.
ROUTING
electrical
units,
CONNECTING
Electrical
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)
INTO
leads through the power
raceway to the line wiring
singlephase
units, connect
CONNECTIONS
a
LEADS
the power entry side panel. (See Fig. 2 and 3 for location and size)
When the leads are inside the unit, run leads up the high-voltage
The unit cabinet must have an uninterrupted,
unbroken
electrical ground. 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
70 American
National
Standards
Institute/National
Fire
Protection
HIGH-VOLTAGE
POWER
Use
only
copper
wire
between
disconnect
and unit. The
highvoltage
leads should be in a conduit until they enter the duct
panel; conduit termination at the duct panel must be watertight.
HAZARD
Failure to follow this warning
or death.
mm
463.6
463.6
482.6
539.8
539.8
508.0
section.
Table
UNIT SIZE
NOMINAL CAPACITY (ton)
SHIPPING WEIGHT (Ib)
(kg)
COMPRESSOR QUANTITY
TYPE
REFRIGERANT
REFRIGERANT METERING DEVICE
Rows...
LOSS-
OF-
CHARGE/LOW-
0.038
(.89)
(2)
0.038
(.97)
(.97)
2...21
2...21
2...21
2...21
13.6
15.4
17.4
19.3
2700
22
2700
22
2800
22
2800
22
3300
22
3300
22
559
1/8 (825)
559
1/8 (825)
559
1/8 (825)
559
1/8 (825)
559
1/4 (1100)
559
1/4 (1100)
3...15
3...15
4...15
3...15
4...15
4...15
3.7
3.7
3.7
4.7
4.7
5.7
800
10x10
1000
10x10
11 O0
1 lx10
1400
1 lx10
1450
1 lx10
1750
1 lx10
254x254
1/2
254x254
1/2
279x254
3/4
279x254
3/4
279x254
3/4
279x254
1.0
(psig)
650_+15
420_+25
PRESSURE
SWITCH
(Liquid Line) (psig)
Cutout
RETURN-AIR
(2)
13.5
6.1
TXV
0.042 (Left OD
Coil)
0.052 (Right
OD Coil)
(1.07 Left OD
Coil)
(1.32 Right OD
Coil)
12.0
Airflow (CFM)
Size (in.)
PRESSURE
SWITCH
Cutout
Reset (Auto)
(2)
11.5
5.2
TXV
0.038 (Left OD
Coil)
0.046 (Right
OD Coil)
(.97 Left OD
Coil)
(1.17 Right OD
Coil)
2...21
Fins/in.
(mm)
Motor (H P)
HIGH-
0.035
5.0
TXV
50XZ080
5
551
250
12.3
face area (sq. ft.)
INDOOR
BLOWER
Nominal
(2)
4.4
TXV
50XZ048
4
531
241
2...21
face area (sq. ft.)
OUTDOOR
FAN
Nominal Airflow (CFM)
Diameter
(in.)
OUTDOOR
COIL
(mm)
Motor HP (RPM)
INDOOR
COIL
50XZ042
3.5
508
230
1
SCROLL COMPRESSOR
R- 410A
Indoor-TXV
Outdoor-Accurater
9.7
11.0
3.7
TXV
(.89)
Fins/in.
50XZ036
3
451
205
8.2
0.035
(mm)
Data - Unit 50XZ
50XZ030
2.5
408
185
7.5
3.4
TXV
Refrigerant (R-410A) Quantity (Ib)
(kg)
METERING DEVICE ID
ORIFICE OD (in.) QTY
Rows...
I - Physical
50XZ024
2
388
167
20_+5
45_+10
Reset (Auto)
FILTERS throwaway*
(mm)
(in.)
20x20x1
508x508x25
20x24x1
508x610x25
24x30x1
610x762x25
*Required filter sizes shown are based on the larger of the ARI (Air conditioning and Refrigeration Institute) rated cooling airflow or the heating airflow velocity of
300 ft/minute for throwaway type or 450 ft/minute for high-capacity
type. Air filter pressure drop for non-standard
filters must not exceed 0.08 in. wc.
Table
UNIT-5OXZ
AIRFLOW
2 - Minimum
024
750
Airflow
for
Reliable
030
1025
EASY SELECT
- 50XZ
EASY SELECT CONFIGURATION
to configure
a system. The
operate properly with system components
with which it is installed.
To successfully
configure
a basic system (see information
printed
on circuit board label located next to select pins), move the 6 select
wires to the pins which match the components
used.
a. AUX HEAT kW/CFM-SELECT
HEATER RANGE
FOR SIZE OF ELECTRIC
HEATER INSTALLED
must select the auxiliary
heat airflow
approved
for application with kW size heater installed. If no
heater is installed, this step can be skipped. Each select
pin is marked
Operation
with a range of heaters
for which
airflow
(Cfm)
042
1400
(also marked),
TAPS FOR 50XZ
ECM motor uses the selected taps to modify its operation
to a
pre-programmed
table of airflows. The unit must be configured to
Installer
Heater
036
1250
TM
Easy Select taps are used by the installer
Electric
048
1710
is approved.
For increased
060
1800
comfort,
select
the narrowest kW range matching the heater size, for
example, 0-10 for 10-kW heater. This airflow must be
greater than the minimum for CFM for electric heater
application
with the size system installed
for safe and
continuous
operation. (See Tables 3, 4, 5, 6 & 7 for
airflow delivery and n_ininmm CFM.) Note that airflow
marked is the airflow which will be supplied in
emergency
conditioners
source.
heaters
heat mode and heating mode on air
when electric heat is the primary heating
In heat pump
are energized,
heating mode when electric
the ECM will run the higher
of
heat pump heating airflow and electric heater airflow to
ensure safe heater operation. The factory selection is the
largest heater range approved
indicated).
(See Fig. 19, A as
l
INDOOR
{?i;i:/_: THERMOSTAT
RETURN
FROM
POWER _
SOURCE
TOP COVER
DISCONNECT
PER NEC*
*NEC - NATIONAL ELECTRICAL
CODE
C00063
Fig. 10 - Typical
Installation
o
Duct Covers
C00092
Fig. 11 - 50XZ
1" (25 mm)
with Duct Covers
On
MIN.
A08001
Fig. 12 - Condensate
10
Trap
OPM
FOR 042-060
UNITS
ONLY
COMP
BEN
YEL-
CTD (TI.TR)
COMPRESSOR
DELAY
CLOSES
TSAT
OPENS
LAST DFROST
T=30
CYCLE
T:DO
TzDO
MAXIMUM
L
I
o_
G
AUTO BW
r
Y
bN
L
0
I_SUPL
HEAT
k
SUPPL
/
E
W
HEAT
FIELD-THERMOSTAT
SEE
NOTE_2
LEGEND
FIELD
RPLICR
_TERMINA[
o TERMINAL
SPLICE
C>SPLICE
--FACTORY
- -- FIELD
---
FIELD
(MAR_ED)
(UNMARKED}
(MARKED)
WIRING
CONTROL W]RINO
POWER
---- ACCRSSORY
WIRING
DO
DRY
_ERROST
DEFROST
DR
EQUIP
OEFROST RELAY
EQUIPMENT
FU
GND,_
_S
FUSE
GROUND
HIGH PRESSURE
REATZR RELAY
HEATER
WIRING
HTR
OR OPTIONAL
ICM
--TO
INDICATE COMMON
POTENTIAL ONLY:
NOT TO RRPRZSENT WIRING
AHA
C
ADJUSTABLE HRAT
ANTICIPATOR
CONTACTOR
CAP
CO
CCH
COMP
CTO
CAPACITOR
CIRCUIT BREAKER
CRANKCASR
HEAIRR
COMPRESSOR
MOTOR
COMPRESSOR
TIME DELAY
OOARD
IHERMOSTAI
INTEGRATED
MOTOR
S_ITCH
CONTROL
IFM
LPS
OFM
PL
INDOOR FAN MOTOR
LOW PRESSURE S_ITC_
ODTOOOR FAN MOTOR
PLUG
QT
RVS
QAUDRUPLE
REVERSING
_CO
RlO_ BLOW FUSE
THERMOSTAT - COOLING
TIME DELAY RELAy
THERMOSTAT - HEATING
TRANSFORMER
IDR
TH
TRAN
TEfiMIRAL
VALVE SOLENOID
ORB
BLU
VIO
BLK
WRIT
DIP SWITCHSETTINGS
NOIES:
I _ A,Y O_ T_E ORIGINAL _[RES _RNIS_[D
ARE REPLACED.
IT _ST DE REPLAC[O _IT_ TyPE _0 _EGREE C WIRE OR
IT'S EQUIVALENT
2 SEE PRICE PAGES FOR IHERMOSTAI AND S_BBASES
3USE 75 DEGREE COPPER CONDUCTORS fOR FIELD INSTALLATION
4 REPLACE LOW VOLTAGE £_S[S WITH NO GREATER THAN
5 AMP FUSES
5REMOVE Jl WREN _SJNB TRER_IDI_TATIHU_IDISTAT A_D
DERUMIDI_ICAIIO_ _ODE
6REMOVR
JR WREN _SINB ELECTRIC HEAT STAGING
? TO BE WIRED IN ACCORDANCE W1TR NEC AND LOCAl CODES
8THlS
FUSE IS MANUFACTURED BY LIIILZFUSE. PiN 251005
UNIT
OUTDOOR
SECTION
COMPONENT
ARRANGEMENT
FAN
(DEFAULT}
SD MINUTES
"IN--AN-
-
--
CONTROL
SECTION
SINGLE
PT
_
I
:ONNECTION
FOR
ELECT HEAT
FIELD
_UNTING
PANEL ABOVE
INDOOR BLOWER
60 _]NUTES
BOX AREA
L
DEFROST
BOARD
SEE
FOR WIRING
SCHEMATIC
OPTIONS
FOR
TIME PE
RIOO
DEC
ON DEFOOST
DIET SHIFT"
ON
POSITION
/
BEATER
SELECTABL[
BETWEEN DEFROST CYCLES
(MINUTES}
THE COMPRESSOR
WILL SHUT OFF FOR 30
INITIATION
ANO TERMINATION
[N THE "O
/GNB
EQUIP
SREEO_
Up
JUMPERED
FIELO
IC_t_l
_
COMPRESSOR
_R_tPL'CL
_4v
POWER
ENTRY
"
TEST
PINS
SPEED-UP
OFF
IUSE METAL
OBJECT
)
CYCLE
DELAY
R} SHORT FOR R+ DEC
AND RELEASE FOR
I) _OMENPARILY
SHORT PINS ANO RELEAS
3} PERMANENT
SHORT WILL BE IGNORED
FORCED DEFROST
E TO BYPASS
DEFROST
DEFROST
DFT OPEN
FT IS CLOSED
WILL
WILL
TERMINATE
TERMINATE
IN 30 SZC
IF
NORMALLY
IF O
50JZ500312
04B ODO
A0848_
Fig. 13 - Wiring
Schematics
- 50XZ
11
Single
Phase
4.0
SCHEMATIC
FIELD
2081_0-340
DR
_YEL
--
POWER
[OUIP_GND
FOR 042-060
YEL
BL_
UNITS ONLY
OHM
COUP
FOR
042-060
UNITS
ONLY
GRR-YEL
YEL
_
CTB (T1,T2)
CO,_PRESSOR BELAY
BET
Oft,Of2
[_
TEL
PL4-4
"
_
RVS
CI
CI
CLOSES
TSAT
OPENS
LAST
BFROST
f:3O
CYCLE
_4AXIMU_
f:GO
T:90
T:120
BLK
32
A_
MANUAL R[SETL_
I
I
I
6RN_YEL
GRN-YEL
/
BRN --
TO C
BRN--
TO OB
BRN--
ON
G
AUTO
SW
TO C
TO TRANS
5
ire
AMP
TO ICM
/
Y
TO SECI
b,
TO TRANS
' SUPPL
H SUPL
HEAT
E
TO HR
SUPPL
BEAT
F IELD-THZRF4OSTAT
SEE
NOTE_2
TO HR
TO C
LEGEND
FIELD SPLICE
Q
TERMINAL (MARK[Of
0 TERMINAL (UNMARKED}
O SPL]CE
C]o SPL ]DE (_ARKE B)
--FACTORY
WIRING
-- --FIELD
CONTROL _tIRINB
--- FIELD POWER WIRING
---- ACCESSORY OR OPTIONAL
WIRING
TO I_DICA_E CO_ON
POTENTIAL ONLY:
NOT TO REPRESENT WIRING
DB
DEEROST BOARD
OFT
DEFROST
DR
EOUIP
FU
BND
HPS
HR
HTR
DEFROST RELAY
EOUIP,_ENT
FUSE
GROUND
HIG,_ PRESSURE SW]TCB
HEATER RELAY
HEATER
]OX
INTEGRATED CONTROL
MOTOR
INDOOR FAN )40_OR
LOW PRESSURE SWITCH
O_TDOOR fAN _{OTOR
PLUG
[F,_
LPS
or_
PL
--
AHA
ADJUSTABLE NEAT
ANTIC IPA_OR
AP
¢B
CCFL
COMP
CTD
CAPACITOR
CIRCUIT BREAKER
CRANKCASE HEATER
COMPRESSOR MOTOR
COMPRESSOR TI_[ DELAY
THERMOSTAT
OT
RVS
OA_DRUPLE TERMINAL
REVERSII_G VALVE SOLENOID
SLOW BLOWY FUSE
THER&{OSTAT " COOLING
TLME DELAY RELAY
THERMOSTAT - HEATING
TRANSFORWER
fOR
fH
THAN
ORB
BLU
vIO
BLH
WHT
DIP SWITCH SETTINGS
NOTES:
fir
ANY
OF
THE
ORIGINAL
IT MUST
aE
REPLACED
iT'S
EOUlVALENT
2SEE
PRICE
3USE
75
4REPLAC[
5 A_P
PAGES
DEGREE
LO_
_USES
COPPER
VOLIAGE
5REHOVE
_I
WHE_
DEHUMIDIFICATION
6REHOVE
J2
[OR
WHEN
_IR[S
WITN
TYPE
I_[RNOSIAT
CONDUCTORS
fUSES
_IlN
g_NISH{D
90
ARE
_EGREE
AN_
FIEL_
FOR
_0
C
REPLAC[D_
WIRE
GREATER
USING
MO_E
THERg[DISIAIIH_HIOlSTAI
_SING
ELECIRIC
UNIT
CONPONENT
ARRANGEMENT
OR
OUTDOOR
SECTION
S_8BASES
FAN
(DEFAULT)
30 MINUTES
INSIALLAT[O_
HEAl
12o }4INUTES
gO MINUTES
k_p
CONTROL
710
BE _IR[_
I_ ACCORDANCE
B TNIS
_SE
IS MANUFACTURED
60 MINUTES
THAN
BOX AREA
SIAGING
WITH
NED
AND
BY
LITTLE_SE,
LOCAL
P/_
C00£S
2570_5
SINGLE
_
....
J
PT
_
CONNECTION
FOR
ELECT }_EAT
#
FIELB SELECTABLE OPTIONS FOR TIRE PE RIOO
BETWEEN DEFROST CYCLES
(MINUTES)
THE COMPRESSOR
WILL SHUT OFF FOR 30 SEC
ON DEFROST
INITIATION
POSITIO_
DEFROST
BOARD
/
SEE BEATER
MOUNTING
PANEL ABOVE
INDOOR BLOWER
FOR
WIRING
SCHEMATIC
_EOUIP
GNB
UP
TERMINATION
JB_PEREB
_
FIELD
TEST
IN THE
PINS
SPEED-UP
"0 DIET SBI_T"
_4V
POWER
ENTRY
CYCLE
-060
RELEASE
21 SHORT FOR
3} PERMANENT
S+ SEC
AND RELEASE FOR
SHORT WILL BE IBNOREB
DEFROST
BEFROST
TERMINATE
TERMINATE
WILL
WILL
O_
(USE METAL OBJECT
II _O_ENTARILY
SHORT PINS AND
COMPRESSOR
OFF DELAY
_
IZ_Z[%TL,C__
0_2
AND
SPEED_
IN 30 SEC
IF
NORMALLY
IF D
TO BYPASS
FORCED
DEFROST
BET OPEN
FT IS CLOSED
50XZ500242
3,0
AO8467
Fig. 14 - Wiring
Schematics
- 50XZ
12
Three
Phase
HIGH VOLTAGE
POWER LEADS
(SEE UNITWIRING
LABEL)
(
Io_ <[
--
-
Lc.
- -SSUPP
_[
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=
FIELD-SUPPLIED
FUSED DISCONNECT
GND
CONTROL
°- "LOWER
BOX
'O'
2LK2_)O,
--YE--L&YL
GROG)
LOW-VOLTAGE
POWER LEADS(SEE UNIT
WIRING LABEL)
SPLICE
$
$
O.
RED,R±
O,
O
BRN--(C).Z
WH_LW2)
b
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O.R_0£ '1:)'
,THERMOSTAT
(TYPICAL)
:£
24 V Circuit Breaker
BOX
24 Volt Com t
LEGEND
C99070
Field Control-Voltage
Wiring
Field High-Voltage
Wiring
Fig. 17 - Control Wiring Plate
.......
A08472
Fig. 15 - High and Control Voltage Wiring Connections
(3.) HP-EFF (Factory Selected for 50XZ)- Heat Pump
Efficiency provides same airflow for heating and
cooling modes to increase overall HP efficiency;
approximately 350 CFM per ton.
d. AC/HP CFM ADJUST-SELECT
NOMINAL, LOW,
OR HIGH AIRFLOW
The AC/HP CFM Adjust select is factory set to the
High-Hi (NOM for 060) tap. The CFM Adjust
selections NOM/LO will regulate airflow supplied for
all operational modes, except non-heat pump heating
modes. HI provides 15 percent airflow over nominal
unit size selected and LO provides 10 percent airflow
below nominal unit size selected. CFM Adjust selection
options are provided to adjust airflow supplied to meet
individual installation needs for such things as noise,
comfort, and humidity removal (See Fig. 19, D as
indicated).
e. ON/OFF DELAY-SELECT DESIRED TIME DELAY
PROFILE
Four motor operation delay profiles are provided to
customize and enhance system operation (See Fig. 19, E
as indicated).
Selection options are:
GROUND
LUG
:INSLPICE BOX)
GROUND
LEAD
SINGLE-PHASE
CONNECTIONS
TO DISCONNECT
PER NEC
3-PHASE
CONNECTIONS
4B:3
L1
L2
L3
NOTE: Use copper wire only.
LEGEND
NEC - National Electrical Code
Field Wiring
Splice Connections
¢q
C99057
Fig. 16 - Line Power
b.
Connections
AC/HP SIZE-SELECT SYSTEM SIZE INSTALLED
The factory setting for air conditioner or heat pump size
is the size which matches the model of packaged unit
installed. Installer should verify air conditioner or heat
pump size to ensure that airflow delivered falls within
proper range for the size unit installed. This applies to
all operational modes with the exception of electric heat
modes (See Fig. 19, B as indicated).
SYSTEM TYPE-SELECT SYSTEM TYPE
INSTALLED
The type of system will be factory selected (see below
for details):
(1.) The standard 90 sec off delay (Factory Setting) at
100 percent airflow in cooling or heat pump
heating mode.
(2.) A 30 sec cooling delay with no airflow, 90 sec off
delay at 100 percent airflow profile is used when it
is desirable to allow system coils time to
heat-up/cooldown in coniunction with the airflow
in cooling or heat pump heating mode.
(3.) A no delay option used for servicing unit or when
a thermostat is utilized to perform delay functions.
(1.) AC-Air conditioner
(2.) HP-COMFORT-Heat
Pump Comfort provides
approximately 315 CFM per ton for higher normal
heating air delivery temperature and provides
approximately 350 CFM per ton cooling airflow
for good humidity removal.
(4.) ENH, enhanced selection, provides a 30 sec
cooling on delay with no airflow, plus 150 sec at
70 percent airflow and no off delay for added
comfort. This will minimize cold blow in heat
pump operation and could enhance system
efficiency.
f. CONTINUOUS FAN--SELECT DESIRED FAN
SPEED WHEN THERMOSTAT IS SET ON
CONTINUOUS FAN
13
(1.) LO speed-Factory
mode airflow.
setting,
50 percent
(2.) MED speed-Move
connector
cooling mode airflow.
(3.) HI speed-Move
g.
connector
cooling
to MED,
TRANSFORMER
CONTAINS A MANUAL
RESET OVERCURRENT
PROTECTOR
65 percent
to HI, 100 percent
IT WILL NOT AUTOMATICALLY
cooling mode airflow (See Fig. 19, F as indicated).
LOW-VOLTAGE
CIRCUIT FUSING AND
DISCONNECT
SERVICING
REFERENCE
The low-voltage
circuit is fused by a board-mounted
5-amp automotive
fuse placed in series with the
transformer SEC2 and the R circuit. The C circuit of the
marked
with ground
BASIC
UNIT
The following
symbol.
C99058
CONFIGURATION
basic configuration
of the indoor
will provide ARI rated performance
BASIC CONFIGURATION
should
rated ARI performance
enhancements
POWER PRIOR TO
THIS COMPARTMENT
MUST BE CLOSED
EXCEPT WHEN SERVICING
transformer is referenced to chassis ground through a
printed circuit run at SECI connected to metal standoff
h.
RESET
motor
of the System. This
be used when the
is required,
(1.) AUX HEAT kW/CFM-Select
Label
9 PIN CONNECTOR
or if system
such as super dehumidify
ICM PRINTED
are not needed.
CIRCUIT BOARD '_--_
the heater range for
the size of electric heater installed
no heater is installed).
(2.) AC/HP SIZE-Factory
selected
size installed, please verify.
(3.) SYSTEM TYPE-Factory
unit 50XZ).
Fig. 18 - Transformer
(skip
_
this step if
SEO1_
i
to match system
selected
HP-EFF
(for
(4.) AC/HP CFM ADJUST-Select
HIGH for 042 &
048, NOM for 036 & 060, and LO for 024 & 030.
(5.) ON/OFF
DELAY-Select
(6.) CONTINUOUS
when thermostat
0/90 profile.
FAN-Select
desired fan speed
is set to continuous fan.
COMFORT
OPTIONS-SUPER
DEHUMIDIFY
(See
Quick Reference Guide)
The Super Dehumidify
option is possible when this unit
is installed with a field supplied Thermidistat
control
(Super
Dehumidify
does not require
an outdoor
24VAC
temperature
sensor). The following
configuration
is
recommended
for maximum cooling/dehumidifying
comfort: This configuration
will improve the comfort
provided
humidity
by the air conditioning
system if more
removal is desired. While providing
this
12 PIN CONNECTOR
improved comfort, the system will operate efficiently,
but not at the published
HSPF or ARI SEER efficiency.
The following system configuration
is recommended
for
maximum
(See
heating
and cooling/dehumidifying
C01033
Fig. 19 - Detail
comfort
(9.)
Fig. 19-21).
(1.) AUX HEAT kW/CFM-Select
the narrowest heater
range to match size of electric heater installed (skip
this step if no heater is installed).
(2.) AC/HP Size-Factory
selected
installed, please verify.
(3.) SYSTEM
TYPE-Select
HP-COMFORT
air conditioner
(4.) AC/HP
(5.) ON/OFF
CFM ADJUST-Select
DELAY-Select
(7.) DEHUMIDIFY
activate.
or AC (for
provides
the following
reach wet coil operating
b. A no blower
TM
(or capable
comfort
enhancements:
conditions
off delay eliminates
in cooling.
cold blow which
may
be associated with running the blower after shut down
of the compressor
and avoids reevaporation
of
fan speed
fan.
J1 jumper
THERMIDISTAT
Board
airflow reducing the cold blow sensation at start up in
heating and allowing the indoor coil to more quickly
ENH profile.
MODE-Remove
Printed-Circuit
a. A 30 sec blower on delay with 150 sec at 70 percent
airflow to allow the indoor coil to warm up or cool
down before the blower is asked to deliver 100 percent
NOM (Lo for 060).
(6.) CONTINUOUS
FAN-Select
desired
when thermostat is set to continuous
CONFIGURE
This configuration
system type
system)
of SPP
zoning
system)-Following
its installation
instructions
for Super Dehumidify
and Super
Comfort Heat operation.
to match system size
(for heat pump
system).
GRY ==_
HEATER/MOTOR
condensed
operation.
to
c. Lower
reduce
(8.) LOW VOLTAGE CONNECTIONS-Make
connections
as shown in ELECTRICAL
CONNECTIONS
section.
moisture
cooling/dehumidifying
airflow while the compressor
is running to
draft effects and increase heating air temperature
and improved
operation.
14
after
humidity
control
during
cooling
ACCESSORY
INSTALLATION
a. ACCESSORY
close its contacts.
ELECTRIC
Electric heaters
per instructions
may be installed with the 50XZ units
supplied with electric heater package.
See unit rating plate for factory-approved
kits.
b. AUXILIARY
electric
standard
The AUX and HUM terminals on the Easy Select Board
are tied directly to the G terminal, and provide a 24-v.
AIR CLEANER
Sensor
models
are capable
indoor
system
control
50XZ
SEQUENCE
(See Air Cleaner
d. HUMIDIFIER/HUMIDISTAT
when G thermostat
Price Pages for Part
air
is present.
are
from the Thermidistat
'_ HUM
(See Fig.
capacity
d. COOLING
TO HUMIDIFIER
airflow.
opens R to DH-The
NOTE:
The indoor
capable
of
control
WIRING
unit delivers
of the system.
MODE-SUPER
control
providing
is capable
configuration
DEHUMIDIFY
(see quick reference
guide)
used, such as a Thermidistat,
Super
control
must
be configured
instructions.
Consult
indoor
J
HUMIDIFIER
cooling
airflow which is approximately
80 percent of the
nominal cooling airflow to increase the latent
terminal.
HUM 1F]
(G)
HUMIDITY
unit delivers
Thermidistat
HUMIDISTAT
HUM 2F]
runs
MODE-DEHUMIDIFICATION
OPERATION
24-VAC
Blower
(1.) If indoor temperature
is above temperature
set
point and humidity is above humidity set point,
thermostat or Thermidistat
closes circuits R to G, R
to O, and R to Y/Y2 and humidistat or
using a Thermidistat '_ Control, Zone Comfort Plus or
Comfort Zone II, the 24-v. signal may be sourced
(c)
OPERATION
MODE-LOW
c. COOLING
19-21). Alternately,
the 24-v. signal may be sourced
from the W and C circuit board connections.
When
directly
from
zoning
FAN
to O-The
HUMI and HUM2
to the low-voltage
signal
to a signal
Thermidistat,
(1.) If indoor temperature
is above temperature
set
point and humidity is below humidity set point,
thermostat closes circuits R to G, R to Y/Y2 and R
control of a humidifier through a standard humidistat
(See Fig. 19-21). These terminals are energized with
24-v.
OF
b. COOLING
CONNECTIONS
Easy Select '_ Board terminals
provided for direct connection
of responding
(thermostat,
(1.) Thermostat
closes circuit R to G-The
at continuous
fan airflow.
are not always
Number). The airflow sensor turns on electronic
cleaner when the blower is operating.
DEHUMIDIFY
required.
energized during blower operations,
as described above.
When using an electronic air cleaner with the unit, use
Airflow
SUPER
These
CONNECTIONS
terminals
To
(See Fig. 19-21).
AND
a. CONTINUOUS
and AUX2
close, the airflow
operating modes are available, and to see control set up
instructions.
No special setup or wiring of unit is
further information.
The AUX1
the contacts
control) to operate in comfort control modes such as
Super Dehumidify
Mode. Consult literature provided
with indoor system control to determine if these
signal whenever the G terminal is energized (See Fig.
19). During Super dehumidify
mode, the G signal is not
present and the auxiliary terminals are not energized. If
the installation includes the use of the operating mode,
do not use these terminals to control accessories.
See
Electronic Air Cleaner and Humidifier sections for
humidistat
f. DEHUMIDIFY
CAPABILITIES
heater
TERMINALS
c. ELECTRONIC
When
will return to 100 percent of selected cooling airflow.
activate this mode, remove jumper J1 and wire in a
HEATERS
Dehumidify
operation
nmst be
mode
and
as outlined
in its installation
control
literature
to determine
if
of providing
Super
Dehumidify
inputs
and for
instruction.
Ag5317
Fig. 20 - Humidifier
Wiring
(1.) If the indoor temperature
is below the temperature
set point and the humidity is above the humidity
set point, the Thermidistat
closes circuit R to O,
opens circuits R to DH and R to G, and cycles
circuit R to Y/Y2. If circuit R to G is closed
for 50XZ
EASY SELECT[q
BOARD TERMINAL[q
BLOCK
(24-v.),
cooling
R EMOVEJ
requested value. If circuit R to G is open (0-v.) for
super dehumidify
mode, the motor delivers
reduced airflow to maximize the humidity removal
1
J1
I
I
''_]
HUMIDISTAT
.I
of the system while minimizing
JUMPER
e. ELECTRIC
e,
Wiring
DEHUMIDIFY
HUMIDISTAT
Latent
capacities
for De-Humidify
CAPABILITY
CONNECTION
WITH
Mode
no on or off delays.
for 50XZ
f. HEAT
PUMP
HEATING
(1.) Thermostat
Y/Y2-The
airflow.
than average
systems. If increased latent capacity is an application
requirement,
the circuit board provides connection
terminals for use of a standard humidistat.
The unit will
MODE
(1.) Thermostat
R to W/WI
contacts opening on increasing
its airflow to approximately
80
falls to a level which causes the humidistat
closes circuits R to G and R to
unit delivers selected heat pump
g. HEAT PUMP HEATING
ELECTRIC
HEAT
WITH
heating
AUXILIARY
closes circuits R to G, R to Y/Y2 and
or W2 (and R to O in the case of
defrost).
In the event that electric heating is called for by the
thermostat while the heat pump is also operating in
percent of nominal cooling mode airflow. This reduction
will increase the system latent capacity until the
humidity
over cooling.
MODE
STANDARD
for these units are better
detect the humidistat
humidity and reduce
HEATING
(1.) Thermostat
closes circuit R to W/W1, or W2-The
unit delivers the selected electric heat airflow. There are
Ag5316
Fig. 21 - Humidistat
the motor will deliver airflow at the full
or cooling plus dehumidify
mode
to
15
either
heating
ordefrost
modes,
themotor
will
modify
itsairflow
output,
if necessary,
toprovide
anairflow
whichisdefined
assafeforthe
operation
oftheelectric
heater
during
heat
pump
operation.
Thatairflow
isthegreater
oftheheat
pump
heating
airflow
andtheelectric
heater
only
airflow.
h.HEATING
MODE-SUPER
COMFORT
HEAT
OPERATION
NOTE:Theindoor
control
used,
such
asaThermidistat,
must
be
capable
of providing
Super
Comfort
Heatoperation
modeand
controlmustbe configured
as outlined
in its installation
instructions.
Thesystem
must
beinstalled
withappropriate
outdoor
temperature
sensor.
Consult
indoor
control
literature
todetermine
if
control
is capable
andfor configuration
instructions.
Consult
indoorcontrolinstructions
andsensor
instructions
for sensor
installation
details.
If theoutdoor
temperature
isintherange
of12°Fto40°F(-11°C
to4°C),theThermidistat
closes
circuitR toY/Y2andopens
circuit
R toG.If circuitRtoGisclosed
(24-v.),
themotor
will
deliver
airflow
atthefullheating
requested
value.
If circuit
RtoG
isopen(0-v.)formaximum
heating
comfort,
themotor
delivers
reduced
airflowtomaximize
thetemperature
andminimize
the
drafteffect
oftheheated
airleaving
theunit.
SPECIAL
PROCEDURES
FOR
1. Be sure unit disconnect
2. Disconnect
the
transformer.
17,)
3. Connect
terminal
208-V
Use
primary
See unit wiring
the yellow primary
labeled 200-v.
label.
lead
Checklist
as follows
1. Remove
from
3. Make the following
a. Inspect
broken
ELECTRICAL
Failure to follow this warning
death or property damage.
1. Follow
goggles
recognized
safety practices
when checking or servicing
remove
sources
leak
compressor
terminal
cover
are disconnected
and tagged.
is
suspected
around
5. Never
attempt
to repair soldered
refrigerant system is under pressure.
6. Do not
contains
a. Shut off electrical
tag.
wear
power
4. Verify the following
cutter
and remove
the
blade is correctly
positioned
b. Make
sure that air filter(s)
is in place.
c. Make
sure that condensate
drain pan and trap are filled
d. Make
to ensure proper
sure that
drainage.
on the 060 size, only
the 2 wire ties
fastened to the outdoor coils and reversing
valve/accumulator
have been removed.
e. Make sure that all tools and miscellaneous
have been removed.
until
mounted.
bolts.
loose parts
Do not loosen
has 2 Schrader-type
ports, one low-side
located
on the suction
line, and one
Schrader
fitting
located
on the compressor
line. Be sure that caps on the ports are tight.
1/8" (3 ram) MAX BETWEEN
MOTOR
AND FAN HUB
SHAFT
A08474
Fig. 22 - Fan
before
box if
while
Blade Clearance
Step 1 -- Start-Up
CHECKING COOLING AND HEATING CONTROL
OPERATION
Start and check the unit for proper
control
operation
as follows:
(1.) Place room thermostat SYSTEM switch or MODE
control in OFF position. Observe that blower
motor starts when FAN mode is placed in FAN ON
System
goggles
MOTOR
all
and
position
selected
to unit and install lockout
component
Be sure
conditions:
a. Make sure that outdoor-fan
in fan orifice.
and shuts down according to time delay
on the Easy Select board (See Easy Select
Section) when FAN MODE
AUTO position.
b. Relieve
and reclaim all refrigerant
from system
using both high- and low-pressure
ports.
c. Cut component
connecting
tubing with tubing
d. Carefully
necessary.
flame.
see
iniury,
connection
protective
and
d. Inspect coil fins. If damaged during shipping and
handling, carefully straighten fins with a fin comb.
high-side
discharge
compressor
use torch to remove any component.
oil and refrigerant under pressure.
To remove a component,
proceed as follows:
or
protective
system.
4. Relieve and recover all refrigerant
from system
touching
or disturbing
anything
inside terminal
refrigerant
terminals.
to,
inspections:
c. Inspect all field and factory-wiring
connections.
that connections
are completed
and tight.
HAZARD
and wear
refrigerant
WARNING,
attached
liquid-soap
solution. If a refrigerant leak is detected,
following
Check for Refrigerant Leaks section.
2. Do not operate compressor
or provide any electric power
to unit unless compressor
terminal cover is in place and
secured.
3. Do not
electrical
labels
5. Compressors
are internally spring
or remove compressor
hold-down
could result in personal
and
initial
refrigerant leak. Leak-test
all refrigerant tubing
connections
using electronic leak detector, or
to the transformer
SHOCK
for
for shipping and handling damages such as
lines, loose parts, disconnected
wires, etc.
6. Each unit system
Schrader
fitting
EXPLOSION,
unit
b. Inspect for oil at all refrigerant tubing connections
on unit base. Detecting oil generally indicates a
PRE-START-UP
FIRE,
the
on all DANGER,
CAUTION,
and INFORMATION
shipped with, unit.
(See Fig. 13 or 14 and
lead (w110)
prepare
all access panels.
with water
110)
at the end of this book
and
2. Read and follow instructions
OPERATION
(w
supplied
to inspect
start-up:
switch is open.
yellow
the Start-Up
proceed
switch is placed
in
(20 Thermostat:
When the room temperature
rises to a point that is
slightly above the cooling control setting of the
from unit.
thermostat,
the thermostat completes the circuit
between thermostat terminal R to terminals Y, O
unsweat remaining
tubing stubs when
Oil can ignite when exposed to torch
and G.These
thermostat
16
completed
connect
circuits
contactor
through
the
coil (C) (through
unit
wireY)andECMboard
(through
unitwireG)
across
the24-v.secondary
oftransformer
(TRAN).
Thermidistat
orThermostat
andHumidistat:
When
theroom
temperature
rises
toapointthatis
slightly
above
thecooling
control
setting
ofthe
thermostat,
thethermostat
completes
thecircuit
between
thermostat
terminal
Rtoterminals
Y,O,
DH,andG.These
completed
circuits
through
the
thermostat
connect
contactor
coil(C)(through
unit
wireY)andECMboard
(though
unitwireG)
across
the24-v.secondary
oftransformer
(TRANS).
(3.)Place
system
switch
orMODE
control
inHEAT
position.
Setcontrol
above
roomtemperature.
Observe
thatcompressor,
outdoor
fan,andindoor
blower
motors
start.
Observe
thatheating
cycle
shuts
downaccording
totimedelay
selected
onthe
Easy
Select
board
(See
Easy
Select
Section)
when
control
setting
issatisfied.
(4.)When
using
anautomatic
changeover
room
thermostat
place
bothSYSTEM
orMODE
control
andFANmode
switches
inAUTO
positions.
Observe
thatunitoperates
inCooling
mode
when
temperature
control
issetto"callforCooling"
(below
room
temperature),
andunitoperates
in
Heating
mode
when
temperature
control
issetto
"callforHeating"
(above
roomtemperature).
NOTE:Once
thecompressor
hasstarted
andthenhasstopped,
it
should
notbestarted
againuntil5 minutes have elapsed. The
cooling
cycle
remains
point that is slightly
thermostat.
At
this
between
thermostat
circuits
de-energize
condenser
selected
blower
until
point,
the
terminal
motor
stops.
compressor
temperature
drops
setting
of the room
control
thermostat
"breaks"
R to terminals
contactor
and compressor
the room
the cooling
coil
motors
C
and
ECM
(See Easy
Select
The unit is in a "standby"
for cooling"
the
board.
from
delay also applies
the room
condition,
thermostat.
to heat pump
heating
leaks and charge the unit as follows:
remaining
2. Repair leak following
NOTE:
Install a bi-flow
opened
Leaks
and low-pressure
pressure and reclaim
ports to relieve
system
refrigerant.
accepted practices.
filter drier whenever
the system
has been
for repair.
3. Check
system
for leaks using an approved method.
4. Evacuate refrigerant
system
additional leaks are found.
and reclaim
refrigerant
if no
5. Charge
unit
with
R-410A
refrigerant,
using
a
volumetriccharging
cylinder or accurate scale. Refer to unit
rating plate for required
Step 3 --
Start-Up
Complete
the required
charge.
Adjustments
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 (4°C)
(unless
accessory
low-ambient
kit is installed).
Do not rapid-cycle
the
compressor.
Allow
5 rain. between
"on" cycles
to prevent
compressor
damage.
CHECKING
COOLING
AND
HEATING
CONTROL
OPERATION
Start and check the unit for proper
1. Place room
thermostat
control
SYSTEM
operation
switch
as follows:
or MODE
control
in OFF position.
Observe that blower motor starts when
FAN mode is placed in FAN ON position and shuts down
to
within 60 sec (030-060
size) or 30 sec (024 size) when
FAN MODE switch is placed in AUTO position.
2. Place system
open
Set control
compressor,
The
Section)
for Refrigerant
1. 1. Use both high-
circuit
Y and G. These
Check
Locate and repair refrigerant
stop. After the time delay setting
on the Easy Select board
for the next "call
minute
"on"
below
Step 2 --
switch
above
outdoor
Observe that heating
is satisfied.
, the
or MODE
control
in HEAT
position.
room
temperature.
Observe
fan, and indoor blower motors
cycle shuts down
when control
that
start.
setting
waiting
The
5
mode.
OUTDOORCOIL
NNDOOR
¢
TXV
COIL
in Meterin(
Position
I-"
r-q
LCS
1-"
Bypass
Position
LEGEND
HPS - High Pressure
Switch
LCS - Loss of Charge
_
f}-]
_ _i}_Accuratet_Metering
Arrow indicates
Switch
Device
direction
of flow
D
0
C03011
Fig. 23 - Typical
Heat Pump
Operation,
17
Cooling
Mode
3. When
using
an
automatic
changeover
room
thermostat,
REFRIGERANT
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:
Three-phase,
oriented.
Unit
3-phase
power
the internal
power
nmst
be
scroll
checked
lead orientation.
protector
compressors
to ensure
backwards,
discharge
the difference
pressures
CHECKING
within
to correct
between
direction
The
3-phase
rotation.
compressor
When
suction
ADJUSTING
and
NOTE:
Adjustment
the unit is suspected
charging
label
and pressures
of the refrigerant
of not having
and the tables
in Cooling
is attached
to the outside
is suspect
in Heating
nameplate
amount.
physical
charged
the proper
R-410A
R-410A
only. A refrigerant
reclaim
unless
charge. The
temperatures
charging
all refrigerant
information
CHARGE
level
and charge
may be obtained
from
standard
evacuating
in the specified
techniques.
amount
After
of refrigerant
COOLING
Use Cooling Charging Chart (Fig. 26). Vary refrigerant
until the
conditions
of the chart are met. Note that charging
charts are
different from type normally
used. Charts are based on charging
subcooling
for the various
gauge
and temperature
reading.
Indoor air CFM
range of the unit.
TO
USE
Take
label
access door. If charge
Use
operating conditions.
sensing
devices
are
required.
Connect
the pressure gauge to the service port on the
suction line. Mount the temperature
sensing device on the suction
line and insulate it so that the outdoor ambient does not affect the
refrigerant
is not required
refer to system
of the service
mode,
(This
charge
shown
mode,
with
leak.
the units to correct
Accurate
pressure
REFRIGERANT
CHARGE
The refrigerant system is fully
and is tested and factory sealed.
for
LOW
5 nfinutes,
may be zero.
AND
CHARGE
evacuating
system, weigh
(refer to system data plate).
compressor
off the compressor.
leads to the unit must be reversed
turning
are
proper
If not corrected
will shut
NO
Check
room temperature).
CHARGE
The amount of refrigerant charge is listed on the unit nameplate
and/or the physical data table. Refer to the Refrigeration
Service
Techniques
Manual, Refrigerants
Section.
to
the
COOLING
the liquid
must
be within
CHARGING
line temperature
gauges.
Refer to the chart
temperature
should be.
problem
the normal
CHARTS
and read the manifold
to deternfine
NOTE:
If the
refrigerant
leak, refer to Check
causing
operating
the
what
inaccurate
for Refrigerant
the
pressure
liquid
line
readings
is a
Leaks section.
data table also.)
IMPORTANT:
When
evaluating
indicated adjustment to the specified
very nfinimal.
condition
insufficient
If a substantial
the refrigerant
charge,
factory charge nmst always
adjustment
is indicated,
an
be
INDOOR
AIRFLOW
AND
AIRFLOW
ADJUST-
MENTS
an abnormal
exists somewhere
in the cooling
system,
airflow across either coil or both coils.
such
as
PERSONAL
INJURY
AND UNIT
DAMAGE
HAZARD
Failure to follow this warning could result in personal
or death and possible unit component
damage.
iniury
The heating and cooling operation, the recommended
airflow
is 350 to 450 cfm for each 12,000 Btuh of rated cooling
capacity. For units with optional electric heat, the airflow must
not be reduced below the levels stated in Table 2.
OUTDOOR
9
COIL
INDOOR COIL
i
.,.._ [
TXV in Bypass
Position
.--[
.--[
LCS
1
J
.--[
Mete_ng
Position
LEGEND
HPS - High Pressure Switch
LCS - Loss of Charge Switch
_
[iii_ Accurate¢:Meteting
Device
[]
Arrow indicates direction of flow
C03012
Fig. 24 - Typical
Heat
Pump
Operation,
18
Heating
Mode
Tables
3 & 4 show
both
these tables to determine
NOTE:
Be sure
and adjusted
Airflow can be changed
Select board.
Motor)
utilizes
ID Blower
and cooling
by changing
airflows.
for the system
Refer
to
being installed.
The defrost control is a time/temperature
control which includes a
field-selectable
time period (DIP switch 1 and 2 on the board)
the set up pins on the Easy
between defrost cycles of 30, 60, 90, or 120 minutes (factory set at
30 minutes). To initiate a forced defrost, two options are available
depending
on the status of the defrost thermostat.
return-air
grilles
properly.
state of the art ECM
(Electronic
If defrost thermostat is closed, speedup pins (J1) must be shorted
by placing a flat head screw driver in between
for 5 sec and
Computated
Motors.
releasing,
to observe a complete defrost cycle. When the Quiet
Shift switch is selected, compressor
will be turned off for two 30
Step 4 -- Defrost Control
QUIET
SHIFT
Quiet Shift is a field-selectable
defrost mode, which will eliminate
occasional noise that could be heard at the start of defrost cycle and
restarting of heating cycle. It is selected
(on defrost board) in ON position.
When
Quiet Shift switch
by placing
is placed in ON position,
DIP switch
and a defrost
If defrost
is
shorted (with a flat head screw driver) for 5 sec and released, a
short defrost cycle will be observed
(actual length is dependent
off for 30 sec and then turn back on to complete defrost. At the
start of heating after conclusion
of defrost reversing
valve will
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.
Table
3 - 50XZ
Cooling
030
036
Table
4 - 50XZ
Cooling
CFM
SIZE
ADJUST
EXTERNAL
PIN SELECT
STATIC
048
060
HEAT
PUMP
Heat Pump Effi ",iency and Cooling
600
0.005
700
0.007
0.007
....
800
0.010
0.010
900
0.012
0.012
0.019
-
and speedup
pins
are
Quiet Shift position). When Quiet Shift switch is
the length of defrost
is 1 minute
(30 sec
period
followed
by 30 sec of defrost
with
sec. cycle will be observed.
NOM PIN
0.0-0.39
HI PIN
0.4-0.69
0.7-1.0
0.0-0.39
0.4-0.69
0.7-1.0
885
805
730
99O
93O
855
715
695
645
795
775
745
79O
745
685
89O
85O
785
1105
1030
930
1255
1160
1050
89O
865
825
1010
98O
925
1020
965
895
1140
1105
995
1235
1175
1115
1400
1355
1280
99O
975
940
1125
1110
1085
1160
1080
1020
1305
1275
1220
Dry Coil ECM Airflow
Cabinet
NOM
HI PIN
PIN
0.1-1.0
0.1-1.0
1100
98O
99O
1260
1120
1135
1575
1400
1225
98O
1100
1400
1120
1260
1750
1400
1410
1125
1265
1610
1290
1450
2010
1610
1415
1575
1810
de iverequalairflow
Table
UNIT
SIZE
024
030
036
042
048
060
position,
0.1-1.0
COMFORT
pin selections
is in open
compressor
operation). 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 Shift is in OFF position,
only a brief 30
LO PIN
PRESSURE
RANGE (in. wc)
COOLING*
COOLING
DEHUMIDIFY
HEAT PUMP COMFORT
COOLING*
COOLING
DEHUMIDIFY
HEAT PUMP COMFORT
COOLING*
COOLING
DEHUMIDIFY
042
upon the selected
in ON position,
compressor
off
& Heating
Large
UNIT
thermostat
& Heating
Dry Coil ECM Airflow
Small Cabinet
CFM ADJUST PIN
LO PIN
SELECT
EXTERNAL STATIC
PRESSURE RANGE
0.0-0.39
0.4-0.69
0.7-1.0
(in. wc)
COOLING*
8OO
725
COOLING
715
67O
DEHUMIDIFY
HEAT PUMP
72O
66O
COMFORT
COOLING*
1010
92O
825
COOLING
89O
845
795
DEHUMIDIFY
HEAT PUMP
945
850
765
COMFORT
COOLING*
1110
1025
97O
COOLING
99O
96O
910
DEHUMIDIFY
HEAT PUMP
1035
975
910
COMFORT
7pEfficiency and Cooling pit selections de iver equal airflow
024
sec intervals
during
this complete
defrost
cycle, as explained
previously.
When Quiet Shift switch is in factory default OFF
position, a normal and complete defrost cycle will be observed.
3
initiated, the following
sequence of operation will occur. Reversing
valve will energize, outdoor fan will turn off, compressor
will turn
UNIT
SIZE
DEFROST
are open,
that all supply-and
free from obstructions,
Unit 50XZ
heating
the airflow
1000
0.015
0.015
0.023
0.014
5 - ECM Wet Coil Pressure
1100
......
0.018
0.027
0.017
-
STANDARD
1200
1300
0.021
0.032
0.020
0.027
0.024
0.037
0.024
0.032
19
Drop (in. wc)
CFM (SCFM)
1400
1500
1600
1700
1800
1900
2000
2100
....
0.047
0.031
0.041
0.029
0.035
0.046
0.032
0.039
0.052
0.036
0.043
0.057
0.040
0.063
0.045
0.068
0.049
0.053
0.042
0.027
0.036
If it is desirable to observe a complete defrost in warmer
the defrost thermostat must be closed as follows.
1. Turn off power
2. Disconnect
board.
to outdoor
outdoor
4. After
unit.
(See Fig. 27) Tape to prevent
a
few
temperature
should
at approximately
line or remainder
from
OF2
drop
Heating
below
closing
liquid
point
line
of defrost
30 ° F) (- 1 ° C).
defrost until defrost
(27°C)
thermostat
coil temperature
at liquid
cycle time.
MAINTENANCE
continuing
high performance,
and to minimize
the
of premature
equipment
failure, periodic maintenance
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
NOTE:
about the availability
for
cleanliness
each
each
for tightness
cooling
and controls
season.
Service
for
when
Step 1 -- Air Filter
Never operate
the unit without
a suitable
air filter
Always
the filter
with the
in the return-air
duct system.
same dimensional
for recommended
size and type as originally
filter sizes.
replace
installed.
See Table 1
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 the filter becomes clogged with dust and lint.
Step 2 --
Indoor Blower
NOTE:
All motors
these motors.
For
clean
motor
longer
and Motor
are prelubricated.
life, operating
accumulated
annually.
OWNER:
of a maintenance
dirt
Do not attempt
economy,
and
grease
and continuing
from
the
blower
to lubricate
efficiency,
wheel
and
Consult
your
local
dealer
contract.
Failure to follow
or death.
INJURY
AND UNIT
DAMAGE
HAZARD
Failure to follow this warning could result in personal
or death and unit component
damage.
perform any maintenance
procedures recommended
ELECTRICALSHOCK
Failure to follow
iniury or death:
on this equipment,
other than those
in the Owner's Manual.
HAZARD
these warnings
could
result
in personal
1. Turn off electrical power to the unit before performing
maintenance
or service on this unit.
caution
3. Never place anything
with the unit.
OPERATION
Failure to follow
operation.
when removing
combustible
panels
any
and parts.
either on or in contact
HAZARD
this caution
may result in improper
HAZARD
this warning
could result in personal
iniury
Disconnect
and tag electrical power to the unit before cleaning
and lubricating
the blower motor and wheel.
iniury
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
UNIT
connections
operation
ELECTRICALSHOCK
2. Use extreme
wheel
unit, refer to Table 8.
TO EQUIPMENT
PERSONAL
and
necessary.
frost to accumulate
mode,
motor
Clean when necessary.
electrical
proper
on control
5. Turn off power to outdoor and reconnect fan motor lead to
OF2 on control board after above forced defrost cycle.
To ensure
possibility
season.
grounding.
allowing
in
80°F
of defrost
blower
cooling
IMPORTANT:
minutes
thermostat (approximately
NOTE:
Unit will remain
in
reopens
lead
mode,
3. Inspect
4. Check
fan motor
3. Restart unit in Heating
on outdoor coil.
weather,
Step 3 -- Outdoor Coil, Indoor
Condensate Drain Pan
Coil, and
Inspect the condenser coil, evaporator coil, and condensate drain
pan at least once each year.
The coils are easily cleaned when dry; therefore, inspect and clean
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 cleaner, using the soft brush
attachment. Be careful not to bend the 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, insulation, wiring, 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.
Inspect the drain pan and condensate drain line when inspecting
the coils. Clean the drain pan and condensate drain by removing all
foreign matter from the pan. Flush the pan and drain trough with
clear water. Do not splash water on the insulation, motor, wiring, or
air filter(s). If the drain trough is restricted, clear it with a plumbers
snake or similar probe device.
Errors made when reconnecting wires may cause improper
and dangerous
operation. Label all wires prior to
disconnecting when servicing.
The minimum maintenance requirements for this equipment are as
follows:
1. Inspect air filter(s) each month. Clean or replace when
necessary.
2. Inspect indoor coil, drain pan, and condensate drain each
cooling season for cleanliness. Clean when necessary.
20
Table
FILTER SIZE
20X20Xl
508X508X25
20X24X1
508x610x25
24X30Xl
610x762x25
6 - Filter
Table
(in. wc)
1300
CFM
1400
1500
500
600
700
800
900
1000
1100
1200
0.07
0.08
0.10
0.12
0.13
0.14
0.15
0.09
0.10
0.11
0.13
0.14
0.15
0.15
0.07
0.08
0.09
0.10
Heat
Pressure
Drop
024-036
cfm
7 - Electric
Small
500
0.00
0.00
0.00
0.00
0.00
600
0.00
0.00
0.00
0.00
0.00
700
0.00
0.00
0.00
0.00
0.02
800
0.00
0.00
0.00
0.02
0.04
1000
0.00
0.00
0.02
0.06
0.08
Heat Pressure
Large
0100
0.00
0.00
Cabinet:
900
0.00
0.00
0.00
0.04
0.06
Electric
5kw
7.5 kw
10 kw
Drop
0.05
Table
5kw
7.6 kw
10 kw
16 kw
20 kw
Pressure
Cabinet
, _vv
, vvv
, _vv
, _vv
, _vv
,,
0.00
0.00
0.00
0.00
0.01
0.01
0.01
0.02
0.02
0.02
0.03
0.03
0.03
0.04
0.04
0.04
0.05
0.05
Balance
Drop Table
vv
Point
1700
1800
1900
2000
2100
2200
2300
0.11
0.12
0.13
0.14
0.15
0.16
0.17
0.18
Table
11 O0
0.00
0.02
0.04
0.08
0.09
042-060
1600
1200
0.00
0.03
0.06
0.10
0.11
1300
0.02
0.05
0.07
0.12
0.13
1400
0.04
0.07
0.09
0.14
0.15
1500
0.06
0.08
0.10
0.16
0.17
1600
0.07
0.09
0.11
0.18
0.19
(in. wc)
cfm
, vvv
, _vv
_vvv
_,
0.05
0.06
0.06
0.06
0.07
0.07
0.07
0.08
0.08
0.08
0.09
0.09
vv
_vv
_vvv
0.09
0.10
0.10
0.10
0.11
0.11
_w
0711
0.12
0.12
0.12
0.13
0.13
Worksheet
7O
:_
iI
6O
(D
8 o
50
o
,--
o3
._
_
-d
_
-o
o
o
2
060
048
4o
042
036
"-- so
030
5
_
024
20
C3
10
0
-20
-10
0
10
Outdoor
20
Air
30
Temp
40
(Deg
50
6O
F)
C03008
Fig. 25 - 50XZ
Balance
Point
21
Worksheet
_l
Required
Subcooting
Outdoor
Model
oF
Ambient
(oC)
Required
Temperature
Required
82 (28)
85 (29)
95 (35)
105 (41)
(R-410A)
Required
Subcooling
(°C)
10
15
20
25
(kPa)
3
6
8
11
14
56
51
46
41
1303
16
13
11
8
5
7(3.9)
196
63
58
53
48
43
1351
17
15
12
9
6
14.3(7.9)
203
66
61
56
51
46
1399
19
16
13
10
8
12.6(7)
210
68
63
58
53
48
1448
20
17
14
11
9
15,7(8.7)
14.8(8,2)
217
70
65
60
55
50
1496
21
18
15
13
10
14,5(8.1)
11.5(6,4)
224
72
67
62
57
52
1544
22
19
16
14
11
23t
74
59
64
59
54
1593
23
20
18
15
12
238
76
71
66
61
56
1641
24
21
19
16
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
27
25
22
19
16
17
9(5)
030
9.3(5.2)
8.8(4.9)
8.6 (4.8)
7.8(4.3)
036
17.6(9.8)
16.8(9.3)
16.5(9.2)
15.4(8.6)
042
12.8(7.1)
12.7(7.1)
12.7(7.1)
12.6(7)
048
17.5(9.7)
16.9(9.4)
16.6(9.2)
13.7(7.6)
13(7,2)
13(7.2)
Charqinq
1- Measure
2- Measure
the
8.6 (4.7)
Procedure
Discharge
line
Liquid
pressure
line
by attaching
temperature
a gauge
by attaching
to the
service
a temperature
port.
sensing
to it.
3- Insulate
the temperature
doesn'_affect
the
to the
Outdoor
required
if the
values.
Extrapolate
6- Find
the
Pressure
acro88
temperature
Charge
50xz500174
for
8o that
the
Outdoor
Ambient
Subcooling
Outdoor
ambient
Value
in the
the
table
Discharge
Pressure
a required
if the
table
based
temperature
temperature
Compre88or
from
in the
on the
model
size
and
temperature.
if the
Pressure
of the
device
reading.
Ambient
5- Interpolate
sensing
lie8 beyond
lie8
in between
the
table
corresponding
the
table
range.
to the
the
measured
line.
reading
to obtain
the
Liquid
line
Subcooling
measured
]
temperature
i8 higher
Pr_ssur_
5
9.4 (5.2)
8- Add
Subcooling
61
9.8(5.4)
7- Read
a Specific
189
10.3(5.7)
060
the
for
(°F)
Pr_sur_
(p_
024
4- Refer
Line Temperature
Size
75 (24)
device
Liquid
Subcooling
than
the table
value,
260
81
76
71
66
61
1792
268
83
78
73
68
63
1848
29
26
23
20
276
85
80
75
70
65
1903
30
27
24
21
19
284
87
82
77
72
67
1958
31
28
25
22
20
292
89
84
79
74
69
2013
32
29
26
23
21
300
91
86
8t
76
71
2068
33
30
27
24
22
309
93
88
83
78
73
2130
34
31
28
26
23
318
95
90
85
80
75
2192
35
32
29
27
24
327
336
97
99
92
94
87
89
82
84
77
79
2254
36
33
31
28
25
2316
37
34
32
29
26
345
101
96
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
2716
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
3061
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
43
40
484
126
121
116
111
106
3337
52
49
47
44
41
494
127
122
117
112
107
3406
53
50
47
45
42
504
129
124
119
114
109
3475
54
51
48
46
43
514
131
126
121
116
111
3544
55
52
49
46
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
C03008
Fig. 26 - Cooling
Charging
Table-Subcooling
22
O
'n
r_o
--<>--<ED---
-CZ>-
Quiet
Shift
Speedup
Pins
Defrost interval
DI P switches
A08020
Fig. 27 - Defrost
Step 4 -- Outdoor
Keep the condenser
cycle
Fan
fan free from all obstructions
6 screws holding
2. Turn motor/grille
expose
3. Inspect
outdoor
to ensure
assembly
grille and motor
upside down
for cracks
position
fan blade,
shaft will be visible).
6. 6. Ensure that setscrew
shaft when tightening.
(See Fig. 22)
engages
and check the electrical
the flat area on the motor
Refrigerant
and wiring
annually.
Be
power to the unit.
access panel to locate all the electrical
controls
and wiring.
Check all electrical connections
for tightness. Tighten all screw
connections.
If any smoky or burned
connections
are noticed,
disassemble
the connection,
clean all the parts, restrip
and reassemble the connection properly and securely.
are observed
in
has occurred, check
proper
electrical
label when making
these
Circuit
leak.
or if low performance
is suspected,
leak-test
all
refrigerant tubing using an electronic leak detector, or liquid-soap
solution.
If a refrigerant
leak is detected,
refer to Check for
Refrigerant
Leaks section.
If no refrigerant leaks are found
refer to Checking and Adjusting
Step 7 --
and low performance
is suspected,
Refrigerant
Charge section.
Indoor Airflow
airflow does not require
is suspected.
If a problem
checking
exists, be
sure that all supplyand return-air
grilles are open and free from
obstructions,
and that the air filter is clean. When necessary, refer to
and Wiring
controls
If discrepancies
malfunction
with
the
to the unit wiring
The heating
and/or cooling
unless improper performance
Controls
sure to turn off the electrical
Remove
end (1/8 in. [3 mm] of
grille.
Step 5 -- Electrical
Inspect
and slide fan off
blade so that the hub is
1/8 in. (3 mm) away from the motor
operation.
Refer
If oil is detected
or bends.
5. When
proper
Inspect all refrigerant tubing connections
and the unit base for oil
accumulation
annually.
Detecting
oil generally
indicates
a
refrigerant
the fan blades
loosen setscrew
7. Replace
Step 6 --
to top
on top cover to
4. If fan needs to be removed,
motor shaft.
motor
instrumentation.
checkouts.
fan blade.
replacing
to ensure
operating
cycle, or if a suspected
each
electrical
component
proper cooling operation. Never place articles on top of the
unit. Damage to unit may result.
1. Remove
cover.
Control
the wire end
After inspecting the electrical controls and wiring, replace all the
panels. Start the unit, and observe at least one complete cooling
Indoor
system
Airflow
airflow.
Step 8 -Piston
and
Airflow
Metering
Adjustments
Devices-TXV
section
to check
the
& Accurater
This unit uses 2 types of metering devices. The outdoor metering
device is a fixed orifice and is contained in the brass hex-body
in
the liquid line feeding the outdoor
device is a TXV type device.
23
coils.
The
indoor
metering
Step 12 -- Copeland
Refrigerant)
Scroll Compressor
The compressor
used in this product
is specifically
operate
with
interchanged.
Puron
refrigerant
EXPLOSION
(R-410A)
(Puron
designed
and
to
cannot
be
HAZARD
Failure to follow this warning
death or property damage.
could result in personal
injury,
Wear safety glasses and gloves when handling refrigerants.
Keep torches and other ignition sources away from refrigerant
and oils.
The scroll compressor
pumps refrigerant throughout
the system by
the interaction
of a stationary
and an orbiting scroll. The scroll
compressor
has no dynamic suction or discharge valves, and it is
more tolerant of stresses caused by debris, liquid slugging,
and
flooded starts. The compressor
is equipped with an anti-rotational
oggog7
Fig. 28 - Refrigerant
Step 9 -- Pressure
Circuit
device
device
and an internal
pressure
relief port. The anti-rotational
prevents the scroll from turning backwards
and replaces the
need for a cycle protector.
device, designed
to protect
relief port has an operating
Switches
differential
Pressure switches
are protective
devices
wired
into
control circuit
(low voltage). They shut off compressor if abnom_ally high or low
pressures
are present in the refrigeration
circuit. These pressure
switches are specifically
systems. R-22 pressure
for the Puron (R-410A)
designed
switches
system.
to operate with Puron (R-410A)
must not be used as replacements
is located
suction
pressures
airflow
across indoor
by such
drop at about 20 psig. If system
should be closed. To check switch:
2. Disconnect
3. Apply
ohm
under
meter
leads
these
pressure,
switches
If switch
must be removed,
charge
so that pressure
without
breaking
protects
low
PROPERTY
HAZARD
on a pressure
is above
this,
you
switch.
are
remove
against excessive
have
this device for
COMPRESSOR
The Copeland scroll compressor uses 3MAF
oil is needed,
use Uniqema
RL32-3MAF.
and recover
read 0 psig.
Never
all system
open
system
Switch
is located
condenser
in the discharge
coil pressure.
line
It opens
and
at 650
water readily.
oils designed
precautions
SERVICING
High
THETIC
pressure
may be caused
by a dirty
outdoor
coil, failed
fan
air recirculation.
1. Turn off all power
2. Disconnect
to unit.
leads on switch.
3. Apply ohm meter leads across
continuity
on a good switch.
OIL
switch.
You should
have
POE oil. If additional
If this oil is not
POE oils can absorb 15 times as much water as other
for HCFC and CFC refrigerants.
Take all necessary
to avoid exposure
SYSTEMS
of the oil to the atmosphere.
ON
ROOFS
WITH
SYN-
MATERIALS
POE (polyolester)
compressor
term damage to some synthetic
To check switch:
damage
available, use Copeland Ultra 32 CC or Mobil Arctic EAL22 CC.
This oil is extremely
hygroscopic,
meaning
it absorbs
water
readily. This oil is extremely
hygroscopic,
meaning
it absorbs
psig.
motor, or outdoor
INJURY
could result in property
that a problem
with dry nitrogen.
High-Pressure
switch
certain
PERSONAL
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. Gauge set,
hoses, and recovery system must be designed to handle Puron.
If you are unsure consult the equipment manufacturer.
to refrigeration
to remove
OR
switch
You should
attached
are reasonably
gauges
vacuum
HAZARD
Failure to follow this warning
or personal iniury or death.
it is not advisable
exists.
high-pressure
low
etc. It opens
pressure
across
unless
The
against
of charge,
switch.
troubleshooting
Step 11 --
as loss
to unit.
on a good
Because
system
This step covers the refrigerant system of the 50XZ, including the
compressor
oil needed,
servicing
systems
on roofs containing
synthetic materials, the filter drier and refrigerant charging.
leads on switch.
continuity
NOTE:
line and protects
events
coil, dirty filters,
1. Turn off all power
System
Switch
on the liquid
caused
pressure.
Step 13 -- Refrigerant
REFRIGERANT
Step 10 -- Loss of Charge
This switch
The pressure
relief port is a safety
against extreme high pressure.
The
range between
550 and 625 psig
lubricants are known to cause long
roofing materials. Exposure,
even if
immediately
cleaned
up, may cause embrittlement
(leading
to
cracking)
to occur in one year or more. When performing
any
service that may risk exposure
of compressor
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, replacing
refrigerant components
such
as filter drier, pressure
or reversing valve.
24
switch,
metering
device,
coil, accumulator,
Synthetic
RoofPrecautionary
1. Cover
extended
polyethylene
approximate
roof
CHECK DEFROST
Procedure
working
area with
an in, permeable
(plastic)
drip
cloth or
10 X 10 fl (3 X 3 m) area.
tarp.
Cover
cloth shop towel to absorb lubricant
spills and prevent
run-offs,
and protect drop cloth from tears caused by tools
or components.
The defrost
area in front
3. Place terry cloth
of the unit service
shop towel
inside
panel with
unit immediately
component(s)
to be serviced and prevent lubricant
through the louvered openings in the unit base.
4. Perform
required
LINE
biflow
FILTER
filter
under
run-offs
(-I°C
drier
of any oil contaminated
material
per
OD stub tube approximately
3 in. (76 ram) long. (See
The defrost thermostat should be located on stub tube.
there is only 1 stub tube used with liquid header, and on
it is the bottom circuit.
thermostat
signals
heat pump
that conditions
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.
service.
5. Remove and dispose
local codes.
LIQUID
a terry
THERMOSTAT
is a liquid header with a brass distributor
and feeder tube
into outdoor coil. At the end of I of the feeder tubes, there is
a 3/8-in.
Fig. 29).
Note that
most units
2. Cover
The
an
There
going
Normal
+/- 1.7°C)
temperature
range
is closed
and open at 80 ° + 5°F (27°C
at 30 °
+
3°F
+/- 2.8°C).
NOTE:
The defrost thermostat nmst be located on the liquid side
of the outdoor coil on the bottom circuit and as close to the coil as
possible.
DRIER
is specifically
designed
to operate
FEEDERTUBE
with
Puron. Use only factory-authorized
components.
Filter drier nmst
be replaced
whenever
the refrigerant
system is opened.
When
STUB TUBE
removing a filter drier, use a tubing cutter to cut the drier from the
system. Do not unsweat a filter drier from the system. Heat from
unsweating
will release moisture and contaminants
from drier into
system.
PURON
(R-410A)
REFRIGERANT
CHARGING
Refer to unit information
plate and charging chart. Some R-410A
refrigerant cylinders contain a dip tube to allow liquid refrigerant to
DEFROST
THERMOSTAT
flow from cylinder
in upright position.
For cylinders equipped
with a dip tube, charge Puron units with cylinder
in upright
position
and a commercial
metering
device in manifold
hose.
Charge
refrigerant
C99029
Fig. 29 - Defrost
into suction-line.
Step 14 -- System Information
LOSS OF CHARGE SWITCH
The loss of charge switch
circuit (low voltage).
pressures are present
NOTE:
system
Because
under
is a protective
pressure,
switches
unless
exists.
must be removed,
you
charge so that pressure
without
breaking
device wired
vacuum
gauges
remove
certain
Never
Refer to the Cooling and Heating
for troubleshooting
information.
START-UP
Use the Start-Up
this device for
that a problem
and recover
read 0 psig.
low
to refrigeration
to remove
are reasonably
into control
if abnormally
are attached
it is not advisable
troubleshooting
If switch
TROUBLESHOOTING
It shuts off" the compressor
in the refrigeration
circuit.
these
Thermostat
all system
open
system
with dry nitrogen.
25
Checklist.
Troubleshooting
CHECKLIST
Chart (Table 8)
PURON®
•
(R-410A)
QUICK
REFERENCE
GUIDE
Puron refrigerant operates at 50-70 percent higher pressures than R-22. Be sure that servicing equipment and replacement
components are designed to operate with Puron
•
Puron refrigerant cylinders are rose colored.
•
Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400.
•
Puron systems should be charged with liquid refrigerant. Use a commercial type metering device in the manifold hose when
charging into suction line with compressor operating
•
Manifold sets should be 700 psig high side and 180 psig low side with 550 psig low-side retard.
•
Use hoses with 700 psig service pressure rating.
•
Leak detectors should be designed to detect HFC refrigerant.
•
Puron, as with other HFCs, is only compatible with POE oils.
•
Vacuum pumps will not remove moisture from oil.
•
Do not use liquid-line filter driers with rated working pressures less than 600 psig.
•
Do not leave Puron suction line filter driers in line longer than 72 hours.
•
Do not install a suction-line
•
POE oils absorb moisture rapidly. Do not expose oil to atmosphere.
•
POE oils may cause damage to certain plastics and roofing materials.
•
Wrap all filter driers and service valves with wet cloth when brazing.
•
•
A factory approved liquid-line filter drier is required on every unit.
Do NOT use an R-22 TXV.
•
If indoor unit is equipped with an R-22 TXV or piston metering device, it must be changed to a hard shutoff Puron TXV.
•
Never open system to atmosphere while it is under a vacuum.
•
When system must be opened for service, recover refrigerant, evacuate then break vacuum with dry nitrogen and replace filter
filter drier in liquid line.
driers. Evacuate to 500 microns prior to recharging.
•
Do not vent Puron into the atmosphere.
•
Do not use capillary tube coils.
•
Observe all warnings, cautions, and bold text.
•
All indoor coils must be installed with a hard shutoff Puron TXV metering device.
26
9 PIN CONNECTOR -ECM PRINTED
CIRCUIT
BOARD
C23
__
A_.._
1. Configuration
Taps
(See Installation Instructions, for detailed description)
A. HEAT RANGE - Set for gas heat size (EX:090 for unit048090---)D
B. AC/HP SIZE - Set for size of outdoor unit (Cooling Size)
C. SYSTEM TYPE - Select "AC" for Gas Package UnitsN
D. AC/HP CFM ADJUST - Select "NOM"
E. ON/OFF DELAY - Do not use "ENH" for this unit
\_
C::3
EASYSELECT
I€
_SEC1GAS HEAT
vi_
_
_o
_
SEC2
I C_M
_ioo _o
_
F. CONTINUOUS
FAN - Select desired speed
2. Remove Jumper J1 to activate all dehumidify modes
3. Complete wiring and install outdoor temperature [B
sensor according to Installation Instructions
i
_o
AC/PPSIZE
:
C'-J_
O--_
_
I
8
i
HP_
-
FF
ACiHP CFMADJUST
E _f_/.
_m_
_o
'OF
ELA
90
o
E÷
(__
DH
m
_
Wl
_
G
1. Set "DIP Switches" - Set the dip switches
Thermidistat
Control Board) appropriately
system being installed.
Q' C
9
O
2. Thermidistat
(See
F___
yE__ LO[_
NED
_
_/EL
(back of [q
for specific n
_
AUX2
HUM2
Thermidistat
Control
Control
Configurations
installation
Speed
Instructions
for detailed
description)_
* Option
5 (Variable
Indoor Motor) - Set to ON
* Option
* Option
7 (Super Dehumidify) - Set to ON
17 - Select Programmable
or non-programmable
3. Set desired humidity level on fron of Thermidistat
(50 to 55 % RH recommended).
For dehumidification
0/7=__
=
cooling,
mode.
in
both "dhu" and "cool" must be displayed.
J
C01034
ECM
ID Blower
Motor-Quick
27
Reference
Guide
Table
8 - Troubleshooting
SYMPTOM
Chart
CAUSE
REMEDY
Power failure
Call power company
Replace fuse or reset circuit breaker
Fuse blown or circuit breaker tripped
Compressor
and condenser
fan will not start.
Defective contactor, transformer, or high-pressure,
loss-of-charge
or low-pressure switch
Replace component
Insufficient line voltage
Determine
Incorrect or faulty wiring
Check wiring diagram and rewire correctly
Lower thermostat setting below room temperature
Thermostat
setting too high
Faulty wiring or loose connections
cuit
Compressor
runs
Three-phase
will not start but condenser
fan
in compressor
cir-
Determine
Defective run/start capacitor, overload, start relay
Determine
One leg of 3-phase
Replace fuse or reset circuit breaker
Determine cause
power dead
is rotating in the wrong direction
overcharge
or undercharge
Defective compressor
Compressor
operates continuously
Replace
Locate restriction and remove
motor or capacitor
Restriction in refrigerant system
Dirty air filter
Unit undersized for load
Thermostat set too low
Replace filter
Decrease load or increase
Reset thermostat
Low refrigerant
Locate leak, repair, and recharge
charge
Refrigerant
unit size
Recover refrigerant, evacuate system, and recharge
Clean coil or remove restriction
Replace filter
Clean coil
overcharged
or air short-cycling
Low refrigerant charge
Recover excess refrigerant
Recover refrigerant, evacuate system, and recharge
Determine cause and correct
Check fo rleaks, repair, and recharge.
Remove restriction
Restriction in liquid tube
High heat load
Check for source and eliminate
Refrigerant overcharged
Dirty air filter
Recover excess refrigerant
Replace filter
Low refrigerant charge
Check for leaks, repair and recharge
Remove source of restriction
Metering device or low side restricted
Suction pressure too low
cause and correct
Faulty condenser-fan
Condenser air restricted
Excessive suction pressure
evacuate system, and reshown on rating plate
Determine cause and replace
Replace thermostat
Air in system
Head pressure too low
Recover refrigerant,
charge to capacities
Determine
Dirty condenser coil
pressure
3-phase power leads to the unit. Shut down unit
to allow pressures to equalize.
Defective run/start capacitor, overload or start relay
Defective thermostat
Condenser coil dirty or restricted
Dirty air filter
head
cause and replace
Replace and determine cause
Determine cause and correct
Insufficient line voltage
Blocked condenser
Air in system
Excessive
cause
Replace compressor
Correct the direction of rotation by reversing the
Scroll compressor
Refrigerant
Compressor cycles (other than normally satisfying thermostat).
Check wiring and repair or replace
Compressor motor burned out, seized, or
internal overload open
scroll compressor
makes excessive noise, and there may be a
low pressure differential.
cause and correct
Insufficient evaporator
airflow
Temperature too low in conditioned area
Outdoor ambient below 55°F (12.7°C)
Filter drier restricted
28
Increase air quantity
Check filter-replace if necessary
Reset thermostat
Install low-ambient
Replace filter
kit
START-UP
(Remove
I.
Preliminary
MODEL
NO.:
SERIAL
NO.:
CHECKLIST
and Store in Job File)
Information
DATE:
TECHNICIAN:
II.
PRE-START-UP
()
()
()
()
()
()
()
VERIFY
III.
START-UP
(Insert
check
mark
THAT ALL PACKING
REMOVE
ALL SHIPPING
HOLD
ELECTRICAL
in box as each
MATERIALS
DOWN
item is completed)
HAVE BEEN REMOVED
BOLTS AND BRACKETS
CHECK
ALL
CONNECTIONS
AND
CHECK
VERIFY
THAT INDOOR (EVAPORATOR)
AIR FILTER
THAT UNIT INSTALLATION
IS LEVEL
CHECK
FAN WHEEL,
AND PROPELLER
TERMINAL
IN HOUSING/ORIFICE
VOLTAGE
COMPRESSOR
AMPS
INDOOR (EVAPORATOR)
TEMPERATURES
FAN AMPS
OUTDOOR
(CONDENSER)
AIR TEMPERATURE
RETURN-AIR
TEMPERATURE
DB
COOLING
SUPPLY
HEAT PUMP
ELECTRIC
AIR
SUPPLY
HEAT
DB
WB
DB
WB
AIR
SUPPLY
AIR
PRESSURES
REFRIGERANT
SUCTION
REFRIGERANT
DISCHARGE
VERIFY
PSIG SUCTION
CHARGE
at suction
].Measured
at liquid line leaving
IV.
SELECT
EASY
FULL
UNIT MODEL
CHARGING
TEMPI
CHARTS
condenser.
SETTINGS
NUMBER:
AVAILABLE
HEAT SETTINGS
ENTER
AVAILABLE
AIRFLOW
PIN CONNECTION
(0/0 or 0/90 for gas/electric
HEAT AIR PIN CONNECTION
SETTING
SETTING
PIN CONNECTION
CONTINUOUS
USING
TEMP*
inlet to compressor.
ENTER
ADJUST
LINE
PSIG DISCHARGE
REFRIGERANT
*Measured
TYPE
AND SETSCREW
MAKE SURE THAT - (If Applicable)
ON 060 SIZE PURON HEAT PUMP ONLY, THE TWO
OUTDOOR
COILS AND REVERSING
VALVE/ACCUMULATOR
HAVE BEEN REMOVED
SUPPLY
SETTING
models)
FAN PIN CONNECTION
SETTING
EASY SELECT
Heat Settings
AC HI_ Size
I
AC
I
Norm
I
System
[
Lo
[
I
I
HP EFF
Lo
I
Hi
J
ENH
J
Hi
On/Off
o/9o
Type
HP-Comfort
AC/HP CFM Adjust
Delay
3O/_O/O
Med
INSTRUCTIONS
AND IN PLACE
ELECTRICAL
()
UNIT
FOR TIGHTNESS
IS CLEAN
FOR LOCATIONS
FROM
PER INSTALLATION
29
WIRE
TIGHTNESS
TIES FASTEN
TO THE
Copyright
2008 Carrier Corp. •
Manufacturer
reserves
7310 W. Morris St. •
the right to change,
Indianapolis,
IN 46231
at any time, specification8
and design8
Printed in U.S.A.
without
Edition
notice and without
3O
Date:
09/08
obligations,
Catalog No: 50XZ-05SI
Replaces:
50XZ-
4Sl
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