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© 2005 American Standard Inc.  All Rights Reserved

18-BC51D1-3

Installer’s Guide

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 conden-
sate and fog will occur during the defrost cycle.

4. Avoid locating the unit under the eaves or other over-

head structures as sizeable icicles may form and the unit
may be damaged by these falling icicles.

B. LOCATION AND PREPARATION

OF THE UNIT

1. When removing unit from the pallet, notice the tabs on

the basepan. Remove tabs by cutting with a sharp tool as
shown above in Figure 2, and slide unit off of pallet.

2. The unit should be set on a level support pad at least as

large as the unit base pan, such as a concrete slab. If this
is not the application used please refer to application
bulletin “Trane APB2001-02”.

3. The support pad must NOT be in direct contact with any

structure. Unit must be positioned a minimum of 12" from
any wall or surrounding shrubbery to insure adequate
airflow. Clearance must be provided in front of control
box (access panels) and any other side requiring service
access to meet National Electrical Code. Also, the unit
location must be far enough away from any structure to
prevent excess roof run-off water from pouring directly
on the unit. Do not locate unit(s) close to bedroom(s).

4. The top discharge area must be unrestricted for at least

five (5) feet above the unit.

5. When the outdoor unit is mounted on a roof, be sure the

roof will support the unit’s weight. Properly selected
isolation is recommended to prevent transmission to the
building structure.

6. The maximum length of refrigerant lines from outdoor to

indoor unit should NOT exceed sixty (60) feet.

7. If outdoor unit is mounted above the air handler, maxi-

mum lift should not exceed sixty (60) feet (suction line).
If air handler is mounted above condensing unit, maxi-
mum lift should not exceed sixty (60) feet (liquid line).

8. Locate and install indoor coil or air handler in accor-

dance with instruction included with that unit.

C. ACCUTRON™ FLOW CONTROL VALVE

If the indoor unit System Refrigerant Flow control is an
Accutron™ orifice and check valve assembly, an orifice size
change may be necessary.

The outdoor model determines the required orifice size.
Check the listed orifice size on nameplate of the selected
outdoor model. If the indoor unit is factory shipped with a
different orifice size, the orifice must be changed to obtain
system rated performance.

NOTE:
Attach R-410A CAUTION Label (located in documentation
package) to access panel of indoor section.

IMPORTANT:
The outdoor unit is shipped with the proper size orifice and a
stick-on orifice size label in an envelope attached to the outdoor
unit. Outdoor unit nameplate will have correct orifice size
specified as BAYFCCV --- A for rated performance.

D. INSTALLING REFRIGERANT LINES

CAUTION

!

If using existing refrigerant lines make certain that all joints
are brazed, not soldered.

Condensing units have provisions for braze connections.

Pressure taps are provided on the service valves of outdoor
unit for compressor suction and liquid pressures.

The indoor end of the 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.

CAUTION

!

In scroll compressor applications, dome temperatures may
be hot. Do not touch top of compressor, may cause minor
to severe burning.

BASEPAN TAB REMOVAL

2

BRAZE TYPE INDOOR END

3

SEALING CAP

ADAPTER

FLOW CONTROL
CHECK VALVE
(F.C.C.V.) ORIFICE

FIELD SUPPLIED
LIQUID LINE

AS SHIPPED

BODY

ACCUTRON

TM

COMPONENTS

LIQUID LINE SERVICE VALVE

4

Содержание 4TWR4

Страница 1: ...trical and mechanical experience Any attempt to repair a central air conditioning product may result in personal injury and or property damage The manufacturer or seller cannot be responsible for the...

Страница 2: ...ure 6 The maximum length of refrigerant lines from outdoor to indoor unit should NOT exceed sixty 60 feet 7 If outdoor unit is mounted above the air handler maxi mum lift should not exceed sixty 60 fe...

Страница 3: ...hen 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 See Figure 5 BRAZING REFRIGERANT LINES 1 Remove lowe...

Страница 4: ...feet and or a different size than recommended it will be necessary to adjust system refrigerant charge upon completion of installation See unit Service Facts F ELECTRICAL CONNECTIONS WARNING When ins...

Страница 5: ...switch This will activate the compressor sump heat where used Do not change the Thermostat System Switch until power has been applied for one 1 hour Following this procedure will prevent potential co...

Страница 6: ...1 841 33 1 8 946 37 1 4 870 34 1 4 7 8 3 8 152 6 98 3 7 8 219 8 5 8 86 3 3 8 508 20 4TWR2060A 4 1 1045 41 1 8 946 37 1 4 870 34 1 4 7 8 3 8 152 6 98 3 7 8 219 8 5 8 86 3 3 8 508 20 4TWR4018A 3 1 933...

Страница 7: ...18 BC51D1 3 7 Installer s Guide MOUNTING HOLE LOCATION NOTE ALL DIMENSIONS ARE IN MM INCHES NOTE For model base size see table on page 6 From Dwg D152637 Rev 1...

Страница 8: ...ressor O D Fan Won t Start Compressor Will Not Start But O D Fan Runs O D Fan Won t Start Compressor Hums But Won t Start Compressor Cycles on IOL I D Blower Won t Start DEFROST Unit Won t Initiate De...

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