TRANE Air Conditioner/heat Pump(outside Unit) Manual L0810502
User Manual: TRANE TRANE Air conditioner/heat pump(outside unit) Manual TRANE Air conditioner/heat pump(outside unit) Owner's Manual, TRANE Air conditioner/heat pump(outside unit) installation guides
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18-BC42 D 1-2
To
Library
Product Section
Product
It's Hard
Model
To Stop A Trane_. M
Literature Type
I STALLER'
GUI E
Sequence
Date
File No.
Supersedes
Model:
Heat Pumps
TWZ036-060A
IMPORTANT
-- This Document
pack upon completion
of work.
is customer
property
and is to remain
These instructions
do not cover all variations
in systems
nor provide
for every possible
contingency
to be met in
connection
with installation.
Al! phases
of this installation must comply
with NATIONAL,
STATE AND LOCAL
CODES.
Should further
information
be desired or should
particular
problems arise which are not covered sufficiently for
the purchaser's
purposes, the matter should be referred to your
installing
dealer or local distributor.
A.
with this unit.
Please
return
to service
information
d)
GENERAL
NOTICE:
The TWZ036-06OA
proved
with indoor
units
expansion
valve refrigerant
Check for transportation
promptly, to the carrier,
outdoor
equipped
controls.
units
with
are only apthermostatic
damage after unit is uncrated.
Report
any damage found to the unit.
To determine
the electrical
power requirements
of the unit,
refer to the nameplate
of the unit. The electrical power available
must agree with that listed on the nameplate.
The Weathertron
® Heat Pump has been designed and manufactured to withstand
and operate
in severe winter conditions.
However, there are precautionary
steps which should be taken
at the time of installation
which will help assure the efficient
operation of the unit. It is recommended
that these precautions be taken
for units being
installed
in areas
where
snow accumulation
and prolonged
below
freezing
temperatures
occur.
1. Units should be elevated 3 to 12 inches above the pad or
rooftop, depending on local weather. This additional
height will
allow better drainage
of snow and ice (melted during defrost
cycle) prior to its refreezing.
This should prevent a build-up of
ice around the unit which occurs when unit is not elevated.
Insure
that drain
holes in unit base pan are not obstructed
preventing
draining
of defrost
water.
2. If possible, avoid locations that are likely to accumulate
snow
drifts.
If not possible, a snow drift barrier should be installed
around the unit to prevent a build-up of snow on the sides of the
unit and should be of sufficient distance from the unit to prevent
restriction
of airflow to and from the unit. Also allow for proper
maintenance
space. The barrier should be constructed
of materials which will blend in with the building design.
3. Avoid locating
the unit where
condensation
and freezing
of
defrost
vapor may annoy
the customer.
For instance,
installing
the unit under
a bedroom,
kitchen,
or picture
window
may be
annoying
to the customer
since condensate
and fog will occur
during
the defrost
cycle.
4. Avoid locating the unit under the eaves or other overhead
structures
as sizeable icicles may form and the unit may be
damaged by these falling icicles.
Since the manufacturer
has a policy of continuous
product improvement,
it reserves the right to change
specifications
and design without notice.
© American
Standard
Inc.
1997
Dwg.
No. 18-BC42D1-2
I STALLER'S
B. REFRIGERANT
FLOW
GUI
E
CONTROLS
1. Determine
Use only approved indoor units. The indoor coil flow control must
be equipped with a thermal expansion valve. Indoor units without factory installed TXV must be modified to include the approved
BAYTXV-kit.
C. LOCATION
& PREPARATION
OF THE
1. The unit should be set on a level support
as the unit base pan.
UNIT
types
of bends
NOTE:
Large diameter
it has been shaped.
way to run the lines.
to be made and space limitations.
tubing
will be very difficult
to rebend
once
3. Determine
the best starting point for routing the refrigerant
tubing -- INSIDE OR OUTSIDE THE STRUCTURE.
pad at least as large
2. The support
pad must NOT be in direct contact with any
structure.
The unit must be positioned a minimum of 12" from
any wall or surrounding
shrubbery
to insure adequate airflow. A
30" clearance must be provided in front of control box (access
panels) & any other side requiring
service access to meet National Electrical
Code. The unit must be far enough away from
any structure
to prevent excess roof run-off water from pouring
directly on the unit.
3. The top discharge area must
(5) feet above the unit.
2. Consider
the most practical
be unrestricted
for at least
4. Provide a pull-thru
hole of sufficient size to allow both liquid
and gas lines plus fittings to clear. The location of this hole (if
practical) should be just about the wall plate which is resting on
the foundation.
5. Be sure the tubing
6. Uncoil
the tubing
is of sufficient
length.
-- do not kink or dent.
7. Route the tubing making
all required
bends
secure the tubing before making connections.
and
properly
five
8. To prevent
a noise within the building
structure
due to
vibration transmission
from the refrigerant
lines, the following
precautions
should be taken:
4. When the outdoor unit is mounted on a roof, be sure the roof
will support
the unit's weight.
Properly
selected vibration
isolators are recommended
to prevent transmission
to the building structure.
a. When the refrigerant
lines have to be fastened to floor
joists or other framing in a structure,
use isolation type hangers.
5. The maximum
length of refrigerant
lines from outdoor
indoor unit should NOT exceed eighty (80) feet.
b. Isolation hangers
should also be used -when refrigerant
lines are run in stud spaces or enclosed ceilings.
6. Maximum difihrence
five (25) feet.
in elevation
to
should not exceed twenty-
7. Locate and install indoor coil or blower coil in accordance with
instruction included with that unit.
c. Where the refrigerant
lines run through
should be insulated
and isolated.
d. Isolate
E. SERVICE
8. A pull-thru hole for the refrigerant
sufficient size to allow the passage
lines.
lines should be provided of
of both liquid and suction
9. Determine
if adequate power supply
according to nameplate
specifications.
10. Install
codes.
the unit in accordance
D. INSTALLING
is available
with national,
REFRIGERANT
and correct
state,
and local
LINES
Pressure
taps are provided on the service
service valve of outdoor unit for compressor
valve plate and on
suction and liquid
pressures.
The indoor end of recommended
refrigerant
line sets may be
straight
or with a 90 degree bend, depending
upon situation
requirements.
This should be thoroughly
checked out before
ordering refrigerant
line sets.
The gas line must always
be insulated.
The units are factory charged with the system charge required
when using twenty-five
(25) feet of connecting line. Unit nameplate charge is the same. Final refrigerant
charge adjustment
is necessary,
use the Charge
Charts
in the outdoor
unit
Service Facts.
PAGE 2
a wall or sill, they
the lines from all ductwork.
VALVE
BRASS LIQUID
ERATION
AND
OPERATION
GAS LINE
SERVICE
VALVE
OP-
The Service Valves are factory shipped in the seated position to
hold factory charge.
The pressure
tap service port (when depressed) opens only to the field brazing side of the valve when the
valve is in the seated position. The liquid line valve isnot a back
seating valve (see WARNING
below).
WARNING:
Extreme
caution
should
be
exercised
so the internal
steel stem retaining
ring is not
damaged
by backing
out the valve stem when opening
the
valve.
If the valve stem is forced
out past the retaining
ring, system pressure
could force the valve stem out of the
valve body. If the retaining
ring is missing,
do not attempt
to open the valve.
See Figure
2.
BRASS
GAS LINE
BALL
SERVICE
VALVE
The Brass Gas Line Ball Service Valve is shipped in the closed
position to hold the factory refrigerant charge. The pressure tap
service port (when depressed) opens only to the field brazing side
when the valve is in the closed position.
The Gas Line Service Valve is full open with a 1/4 turn counterclockwise.
See Figure 3.
Dwg. No. 18-BC42D1-2
I STALLER'S
@
NOTICE:
pressure
LiQUiD LiNE SERVICE VALVE
GUI
E
Use care to make sure that no moisture
tap port, while wet rag is being used.
enters
6. Remove braze shield from clear plastic bag. Soak pad in water
and place over suetion and liquid lines to protect unit finish. See
Figure 4. Discard pad when finished with brazing.
UNIT SIDE OF
SERVICE
LIQUIDLINE
7. Use a Dry Nitrogen Purge and Brazing Alloy without flux
when brazing the field line to the copper factory connection. Flow
dry nitrogen into either valve pressure tap port, thru the tubing
and out the other port while brazing.
HEX HEADED
8. Braze
using accepted
good brazing
techniques.
CONNECTION
LEAK
CHECK
IMPORTANT:
fore attaching
RETAINING
BRAZING
REFRIGERANT
RING
LINES
1. Before brazing, remove plugs from external copper stub tubes.
Clean internal
and external
surfaces of stub tubes prior to
brazing.
2. Cut and fit tubing
3. Insulate
4. Do NOT
contact with
the entire
minimizing
the use of sharp
90 ° bends.
liquid
line
to come
in direct
5. Precautions
should be taken
to avoid heat damage
to
the pressure
tap valve core during brazing.
It is recommended that the pressure
tap port valve core be removed
and a wet rag wrapped
around
the valve body.
LiNE SERVICE
CAP
UNIT
valve
core
be-
After brazing operation of refrigerant
lines to both the outdoor
and indoor unit is completed,
the field brazed connections
must
be checked for leaks. Pressurize
through the service valve ports,
the indoor unit and field refrigerant
lines with dry nitrogen to
200 psi. Use soap bubbles or other leak-checking
methods to see
that all field joints are leak-free! If not, release
pressure;
then
repair!
SYSTEM
EVACUATION
NOTE:
Since the outdoor
unit has a refrigerant
and liquid
line valves
must remain
closed.
charge,
the gas
VALVE
1. Upon completion of leak check, evacuate the refrigerant
lines
and indoor coil before opening the gas and liquid line valves.
2. Attach appropriate
hoses
liquid line pressure
taps.
from manifold
gauge
to gas and
NOTE:
Unnecessary
switching
of hoses can be avoided and
complete evacuation
of all lines leading to sealed system can be
accomplished
with manifold center hose and connecting branch
hose to a cylinder of HCFC-22 and vacuum pump.
3. Attach
4. Evacuate
microns.
_
center
until
hose of manifold
the micron
gauges
gauge
reads
to vacuum
pump.
no higher
than
350
5. Close offvalve to vacuum pump and observe the micron gauge.
If gauge pressure rises above 500 microns in one (1) minute, then
evacuation
is incomplete
or system has a leak.
SIDE
OF VALVE
#
PRESSURE
port
gas line and its fittings.
allow uninsulated
bare gas line.
GAS
Replace
pressure
tap
hoses for evacuation.
TAP
PORT
j
/
GAS
LINE
CONNECTION
d,
CAP
_
6. If vacuum gauge does not rise above 500 microns
minute, the evacuation
should be complete.
in one (1)
7. With a vacuum pump and micron gauge blanked off, open
valve on HCFC-22 cylinder and charge refrigerant lines and
indoor coil with vapor to tank pressure of HCFC-22 supply.
&
NOTE:
DO NOT
ATMOSPHERE.
VENT
REFRIGERANT
INTO
THE
CORE
Dwg. No. 18-BC42D1-2
PAGE 3
I STALLER'S
GUI
E
If refrigerant
lines are longer than 25 feet and/or a dift_rent size
than recommended,
it will be necessary to adjust system refrigerant charge upon completion
of installation.
HEAT SHIELD
F. ELECTRICAL
CONNECTIONS
WARNING: When
installing
this equipment,
tions to avoid
or servicing
ALWAYS exercise
basic safety
precauthe possibility
of electric
shock.
1. Power -wiring and grounding
local codes.
2,
Power
supply
3. Install
must
a separate
4. Ground
agree with equipment
disconnect
the outdoor
of equipment
switch
must comply with
nameplate.
at the outdoor
unit.
unit per local code requirements.
5. Provide flexible electrical conduit whenever vibration
mission may create a noise problem within the structure.
trans-
6. The use of color coded low voltage -wire is recommended
to
simplify connections between the outdoor unit, the thermostat,
and the indoor unit.
Table 1 -- NEC Class II Control
Wiring
24 VOLTS
WIRE SIZE
MAX. WIRE LENGTH
*22 AWG
30 FT.
20 AWG
100 FT.
18 AWG
150 FT
16 AWG
225 FT.
14 AWG
300 FT.
8. Close valve on HCFC-22 supply cylinder.
Close valves on
manifold gauge set and remove refrigerant
charging hoses from
liquid and gas pressure tap ports.
NOTE:
A 3/16"
Allen
wrench
is required
to ()pen liquid
line
service valve. A 1/4" Open End or Adjustable
wrench is required
to ()pen gas line valve. An Adjustable
or 3/4" Open End wrench
is required
to take ()['['the valve stern cap.
9. The liquid line shut-offvalve
can now be opened. Remove shutoffvalve cap. Fully insert hex wrench into the stein and backout
counterclockwise
until valve stein just touches retainer
ring
(approximately
five (5) turns) observing WARNING
statement.
See Figure 2.
*If 22 AWG is used, make
7. Table 1 defines maximum
from outdoor unit, to indoor
11. The gas valve can now be opened.
Open the gas valve by
removing
the shut-off valve cap and turning
the valve stem
1/4 turn counterclockwise,
using 1/4" Open End or Adjustable
wrench.
See Figure 3.
12. The gas valve is now open for refrigerant
stem cap to prevent leaks. See Figure 3.
PAGE 4
quality
wire.
total length of low voltage
unit, and to thermostat.
wiring
8. Mount the indoor thermostat
in accordance
with instruction
included with the thermostat.
Wire per appropriate
hook-up
diagram (included in these instructions).
G. ELECTRICAL
10. Replace liquid service pressure tap port cap and valve stem
cap. These caps MUST BE REPLACED
to prevent
leaks.
Replace valve stein and pressure
tap cap finger tight, then
tighten an additional
1/6 turn.
sure it is high
HEATERS
Electric heaters, if used, are to be installed in the air handling
device according to the instructions
accompanying
the air handler and the heaters.
H. START
These units
installed.
KIT
have
quick
start
components
which
are factory
flow. Replace valve
Dwg. No. 18-BC42D1-2
I STALLER'S
I.
OUTDOOR
THERMOSTAT
GUI
E
K. OPERATIONALANDCHECKOUTPROCEDURES
An outdoor thermostat
TAYSTAT250A
may be field installed.
For data see wiring diagram attached
to unit and instruction
sheet packaged with outdoor thermostat.
Final phases of this installation
are the unit Operational
and
Checkout Procedures
which are found on page 8 of this instruction.
J. DEFROSTCONTROL
L.
The demand defrost control measures
heat pump outdoor ambient temperature
with a sensor located outside the outdoor coil. A
second sensor located on the outdoor coil is used to measure the
coil temperature.
The diflhrence between the ambient and the
colder coil temperature
is the dift_rence or delta-T measurement.
This delta-T measurement
is representative
of the operating
state and relative capacity of the heat pump system. By measuring the change in delta-T, we can determine
the need for defrost.
The coil sensor also serves to sense outdoor coil temperature
for
termination
of the defrost cycle.
After all electrical wiring is complete, SET THE THERMOSTAT
SYSTEM SWITCH IN THE OFF POSITION SO COMPRESSOR
WILL NOT RUN, and apply power by closing the system main
disconnect switch. This will activate the compressor
sump heat.
Do not change the Thermostat
System Switch until power has
been applied long enough to evaporate any liquid of HCFC-22 in
the compressors
(30 minutes for each pound of HCFC-22 in the
system as shown on the nameplate).
Following this procedure
will prevent compressor
damage at the initial start-up.
FAULT
DETECTION
A fault condition is indicated by the flashing
control inside the heat pump control box.
light on the defrost
In normal operation, the defrost control light will flash once each
second. If the light is flashing more than once per second or notat-all, refer to the service manual for that unit.
COMPRESSOR
SUMP
HEAT
Record the "POWER
below:
APPLIED
Time
A.M./P.M.
DATA" on the designated
lines
Date
By
Electrician
(SEE WIRING DIAGRAMS )
PIN
IDENTIFICATION
1. NORM.
= Normal
(This wire, as shipped, is unattached
to
any pin. In this position, the default condition is normal operation. However, after checking for proper operation,
the wire
should be returned
to the normal pin.)
2. TST. = Test
(Red test wire in this position
defrost board timings.)
speeds
up all
3. FOR. DFT. = Forced Defrost (Touch the red test wire to this
pin for ten (10) seconds to initiate a forced defrost.
Return wire
to the normal pin after defrost initiates.)
4. FOR. FLT. = Forced Fault (Touch the red test wire to this pin
for ten (10) seconds to demonstrate
a fault condition.)
DEFROSTCONTROLCHECKOUT
Normal
a.
b.
c.
d.
operation
LED on
24V AC
24V AC
Defrost
Defrost"
operating
If a defrost
information
requires:
board flashing 1 time/second.
between R & B
between Y & B with unit operating
initiation
when test wire is moved to "Forced
pin, then return to "Normal Pin", with unit
in heating mode.
control problem
in control box.
Dwg. No. 18-BC42D1-2
is suspected,
re%r to the
service
PAGE 5
I STALLER'S
GUI
A TYPICAL
E
FIELD WIRING DIAGRAM FOR TWZ036-060A
VARIABLE SPEED AiR HANDLERS
WITH
NOTES:
1. POWER WIRING AND GROUNDING
COMPLY WITH LOCAL CODES.
2. BE SURE POWER
NAMEPLATE.
3. LOW VOLTAGE
CONDUCTOR.
4. USE COPPER
SUPPLY
WIRING
OF EQUIPMENT
3 HEAT/2
AGREES
WITH
ONLY.
IS NOT USED, CONNECT
TO W2.
IS NOT USED, CONNECT
TO W1.
7. IF ELECTRIC
CONNECT A
IF ELECTRIC
CONNECT A
8. CONNECT
A JUMPER
WIRE
A JUMPER
WIRE
HEAl PUMP
O, D, SECTION
ITWO
HEATER DOES NOT HAVE 3RD CONTACTOR
JUMPER WIRE FROM W3 TO W2.
HEATER DOES NOT HAVE 2ND CONTACTOR
JUMPER WIRE FROM W2 TO W1.
OUTDOOR
TO POWER SUPPLY PER
LOCAl CODED &AS DEF NED
CO@
MINIMUM
5. POLARIZED
PLUG SECTION PM-A IS ATTACHED TO HEATER
CONTROL BOX. SECTION 1-PF IS FACTORY WIRED INTO
AIR HANDLER.
6. IF ODT-B
FROM W3
IF ODT-A
FROM W2
//EATPUMP
TAYSTATS02
EQUIPMENT
TO BE NO. 18 A.W.G.
CONDUCTORS
E!ECTRON!C
THERMOSTAT
MUST
F TO THERMOSTAT
COMPRESSORS/
(CH),
J
(BH).
......
:tL_
F AS SHOWN.
9. IF AN INSUFFICIENT
NUMBER OF CONDUCTORS
IS PRESENT,
OMIT F CONNECTION
TO THE THERMOSTAT
AND CONNECT
OUTDOOR F TO R IN THE OUTDOOR UNIT.
I
{
.............................
i
NOT
10 X2_i/_,
10. X2 MUST BE CONNECTED
TO VARIABLE SPEED AIR HANDLER
TERMINAL W3 AS SHOWN FOR PROPER INDOOR AIR FLOW
DURING THE DEFROST CYCLE.
\/\//
OPERATION,
0OTA (
.......
IN ER COMPONENI WIRING
............................24 V. _ FACTORY
......................
LINE V._" WRING
TO POWR SbPPI Y
PER
OCAL CODES
24V.
_ FIELD
lINE V:,#W!RF;6
From Dwg. 21B151201
A TYPICAL
FIELD WIRING
VARIABLE
DIAGRAM FOR TWZ036-060A
SPEED FURNACES
Rev. 0
WiTH
NOTES:
1. POWER WIRING
LOCAL CODES.
AND GROUNDING
2. BE SURE POWER
3. LOW VOLTAGE
4. USE COPPER
SUPPLY
WIRING
OF EQUIPMENT
AGREES
WITH
MUST COMPLY
EQUIPMENT
TO BE NO. 18 A.W.G. MINIMUM
CONDUCTORS
WITH
NAMEPLATE.
ELECTRONICHEATPUMP
THERMOSTATTAYSTAT502
3 HEAT/2COOL
CONDUCTOR.
TO POWER SUPPLY PER
LOCAL CODES & AS DEFINED
IN FIELD WIRING FABLE
ONLY.
5. MAKE THIS JUMPER CONNECTION ONLY IF THE FURNACE
ENABLE SIGNAL FOR HEATING OPERATION.
6. BONNET THERMOSTAT
REQUIRED IF BONNET
OF 150 ° OR GREATER IS ANTICIPATED.
HEATPUMP
NEEDS FAN
TEMPERATURE
T_
]
_m
__M;_I tl
VARIABLE
SPEED
GAS FURNACE
I WITH ICM FAN MOTORI
£.
[NTER-COMPONENT WIRING
-_'
2dV, ]
FACTORY
LINE V._"WIRING
I
I
L]
SEE FURNACE DIAGRAM
FOR PROPER OIP SWITCH
SETTINGS AND HUMIDISTAT
OPERATION,
L'_
-[0POWER SUPPLY
PER LOCAL CODES
LTAYPLUS103A
24V.
] FIELD
LINE V,_ WIRING
From Dwg. 21B151210
PAGE 6
Rev. 0
Dwg. No. 18-BC42D1-2
I STALLER'S
TWZ036=060A
OUTLINE
GUI
E
DRAWING
NOTE: ALL DIMENSIONS
ARE IN MM (INCHES).
SERVICE
PANEL
_
ELECTRICAL
AND REFRIGERANT
COMPONENTS
CLEARANCES
PER
PREVAILING
CODES.
UNIT
SHOULD
BE PLACED
SO ROOF
RUN-OFF
WAFER
DOES
NO]
POUR
DIRECTLY
ON UNIT,
AND
SHOJLD
BE
AT
LEAST
305
(12")
FROM
WALL
AND ALL
SURROUNDING
SHRUBBERY
ON TWO SIDES,
OTHER
TWO SIDES
UNRESTRICTED.
!r
,,
!! !
U !
28,6
11-1/8)
222
(7/8)
ELECTR]CAL
22.2
17/8)
LOW
VOL
PRESSURE
I/4"
DA
FLARE
K,(},
D A, ItOLE
POWER
D[A,
/
m m
!!
U
il
I
I
I!
Ii
II
II
II
I
El
I
IE
II
I
U !
!I
m F
U
m
m
A
i! ! !i m !
SUPPLY
_ OLE
!
H !
lADE
_1 I
TAPS
!
m m !
II II I
El
II
I
I
II
II
II
II
I
I
H
II
i!
m m m !
II
II
I
H m m m !
FITFINGS
LINE
lr
!!
!! m m
U',!!im!',
W[FH
229
LIQUID
![
19)
i
1!5
(4
4
II
I/2)
SERVICE
VALVE,'E'O.D.
FEMALE
BRAZED
CONNECq
ION
WITH
I/4"
SAE
FLARE
PRESSURE
TAP
_-ITT[NG.
GAS LINE
BALL
SERVICE
VALVE,
BALL
I/4
TURN
"D'O.D.
FEMALE
BRAZED
CONNECTION
WITH
I/4"
SAE
FLARE
PRESSURE
TAP
FITTING.
5/8}
.....60
MODELS
TWZ036A-A
TWZ048A-A
TWZ060A-A
{2
3/8)
A
B
C
1095
1010
902
(43-1/8)
(39-3/4)
(35-1/2)
1095
1010
902
(43-1/8)
(39-3/4)
(35-1/2)
1095
1010
902
(43-1/8)
(39-3/4)
(35-1/2)
D
E
7/8
3/8
1-1/8
3/8
1-1/8
3/8
From Dwg. 21 D147482 Rev. 6
Dwg. No. 18-BC42D1-2
PAGE 7
I STALLER'S
GUI
E
CHECKOUT
After installation has been completed,
following list:
1. Refrigerant
PROCEDURE
it is recommended
be checked
against
the
[
]
[
]
[
]
4. Have passages through masonry been sealed? If mortar is used, prevent mortar from
coming into direct contact with copper tubing ....................................................................................
[
]
5. Indoor coil drain line drains freely.
Pour water into drain pan ............................................................
[
]
6. Supply
open and unobstructed
[
]
7. Return air filter installed ......................................................................................................................
[
]
8. Thermostat thermometer
is accurate. Check against a reliable thermometer.
Adjust
per instructions with thermostat ..........................................................................................................
[
]
9. Is correct
[
]
2. Suction
Line, Leak checked
that the entire system
..........................................................................................................
Lines and Fittings properly
3. Have all Refrigerant
registers
speed
insulated ......................................................................................
Lines been secured
and return grilles
tap being used?
and isolated properly?
(Indoor
blower
motor)
........................................................
...............................................................
...................................................................
SYSTEM OPERATIONAL
CHECK
IMPORTANT: To prevent compressor damage which may result from the presence
crankcase, these procedures should be followed at initial Start-Up and at anytime
12 hours or more.
of LIQUID refrigerant in the
the power has been off for
1. Before proceeding with this "Operational Check," go to "Compressor Sump Heat Section" of this instruction to
determine the time compressor heat has been "ON," and make entry of the designated lines, in Step 2.
2. Start-Up Time
A.M./P.M.
Time Lapse
Power Applied Time
Hours
A.M./P.M.
Minutes.
3. If Steps 1 and 2 cannot be used, then place thermostat's system switch in the "OFF" position and apply power
by closing system disconnect switch. This energizes compressor
heat and evaporates the liquid in the
crankcase. TO EVAPORATE LIQUID ALLOW AT LEAST ONE-HALF HOUR PER POUND (HCFC-22), AS
SHOWN ON UNIT NAMEPLATE.
OPERATING PRESSURES: After the unit has operated in the cooling mode for a short period of time, install
pressure gauges on the gauge ports of the discharge and suction line valves. Check the suction and discharge
pressures and compare them to the normal operating pressures provided in the unit's Service Facts.
NOTE: Use the pressures from Service Facts to determine the unit refrigerant charge.
To charge the system accurately, use charging curve, or pressures depending
on flow control.
4. Except as required for safety while servicing: DO NOT OPEN SYSTEM
DISCONNECT
SWITCH.
SUPPLEMENTARY HEATERS CHECKOUT PROCEDURES, IF USED
DOES HEATER
1. Be sure the fused disconnect
3. Check fuses for proper size per nameplate
NOTE:
OPERATION
Technical Literature
PAGE 8
and grounding
specifications
................................
[
]
according to codes .....................................
[
]
[
]
[
]
.....................................................................
in place and secured ..................................................................................
OF HEATERS
SYSTEM.
CIRCUIT?
switch is "OFF," and safety label (if any) is attached
2. Check on field wiring for sound connections
4. Check control box panel-
REQUIRE A SEPARATE
MUST BE CHECKED
DURING THE OPERATION
CHECK OF THE TOTAL
The
-Printed
in U.S.A.
Trane
Company
6200 Troup Highway
Tyler, TX 75707
Dwg. No. 18-BC42D1-2
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