Trane TWX060C, TWX030-048D, TWX018-0240 User Manual

TIUIHE

It's Hard To Stop A Trane?

INSTALLER'S GUID

Model:

Library Product Section

Product Model

Literature Type Sequence

Date File No.

Supersedes

18-BC39D6-4

TWX018-0240, TWX030-048D & TWX060C Heat Pumps

IMPORTANT -- This Document is customer property and is to remain with this unit. Please return to service information pack upon completion of work.

These instructions do not cover all variations in systems nor provide for every possible contingency to be met in connection with installation. All phases of this installa-

tion 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. GENERAL

NOTICE: These outdoor units may be used with indoor

units equipped with Capillary Tube, Thermostatic Ex- pansion Valve or the Accutron TM Flow Control Check

Valve (F.C.C.V.) assembly for refrigerant flow control.

Check for transportation damage alter unit is uncrated. Report promptly, to the carrier, any damage fbund 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 manufac- tured 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 precau-

tions be taken for units being installed in areas where snow accumulation and prolonged below freezing tem-

peratures occur.

1. Units should be elevated 3 to 12 inches above the pad or rooftop, depending on local weather. This additional height will

allow be tter dra inclge of snow and ice (melted during del)'ost cycle) prior to its refPeezing. 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 drills. If not possible, a snow drill 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 li'om the unit. Also allow for proper

maintenance space. The barrier should be constructed of mate- rials 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 lbg 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 Trane Company has a policy of continuous

product and product data improvement, it reserves the

INSTALLER'S GUIDE

B. LOCATION & PREPARATION OF THE UNIT

1. The unit should be set on a level support pad at least as large as the unit base pan.

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 fl'om any structure to prevent excess roof run-off water fi'om pouring directly on the unit.

3. These units are shipped with (4) 4" mounting legs and (8) robber isolators. Loosen two screws on each corner and slide slots in mounting leg under head of screws (as illustrated in Figure 2) and tighten: do this at all four corners.

4. Vibration isolaters (shipped with unit) should be used if location requires vibration isolation. Place supplied mounting pads under unit corner legs as illustrated in Figure 2.

5. 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 build- ing structure.

6. The maximum length of refrigerant lines li'om outdoor to indoor unit should NOT exceed sixty (60) feet.

7. Maximum diffbrence in elevation should not exceed sixty (60) feet.

NOTE: Refer to '_e[i_gerant Pipir_ Software'; Pub. No. 32-3312-01.

8. Locate and install indoor coil or blower coil in accordance with instruction included with that unit.

9. A pull-thru hole for the refrigerant lines should be provided of sufficient size to allow the passage of both liquid and suction

lines.

UNIT LEG & ISOLATOR LOCATION

NIT UNIT LEG

\ _ ISOLATORS

LOOSEN TWO SCREWS AND

SLIDE SLOT OF LEG UNDER

HEAD OF SCREWS AND TIGHTEN

(2 PER LEG)

PAD

(_ BRAZE TYPE INDOOR END

SEALING CAP

COMPONENTS

ACCUTRONTU

_' FLOW CONTROL

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

LIQUID LINE FIELD SUPPLIED

10. Determine if adequate power supply is available and correct according to nameplate specifications.

11. Install the unit in accordance with national, state, and local codes.

C. ACCUTRON TM FLOW CONTROL VALVE

If the indoor unit System Refrigerant Flow control is an

Accutron TM orifice and check valve assembly, an orifice size

change ,nay 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 lhctory shipped with a different orifice size, the orifice must be changed to obtain system rated performance.

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 perlbrmance.

D. INSTALLING REFRIGERANT LINES

Pressure taps are provided on the service valve plate and on service valve of outdoor unit Ibr compressor 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 fifteen (15) feet of connecting line. Unit nameplate

charge is the same. Final refl'igerant charge adjustment is necessary, use the Charge Charts in the outdoor unit Service

Facts.

TYPICAL 4 CORNERS

2. Consider types of bends to be made and space limitations.

PAGE 2 Pub. No. 18-BC39D6-4

1. Determine the most practical way to run the lines.

LIQUID LINE SERVICE VALVE

<,.

UNIT SIDE OF SERVICE VALVE

LIQUIDLINE

HEX HEADED

CONNECTION

RETAINING RING

NOTE: Large diameter tubin_ will be very di[f_cult to rebend once

it has been shaped,

3. Determine the best starting point for routing the refrigerant tubing-INSIDE OR OUTSIDE THE STRUCTURE.

4. Provide a pull-thru hole of sufficient size to allow both liquid and gas lines plus fittings to dear. The location of this hole (if

practical) should be just above the wall plate which is resting on the foundation.

5. Be sure the tubing is of sufficient length.

6. Uncoil the tubing --- do not kink or dent.

7. Route the tubing making all required bends and properly secure the tubing before making connections.

GAS LINE SERVICE VALVE

CAP _ ,[--'J, 1/4 TURN ONLY

_ _-_//_- POSITION

UNIT SiDE

OF VALVE

PRESSURE TAP PORT /

GAS LiNE CONNECTION

CAP _

COUNTERCLOCKWISE FOR FULL OPEN

VALVE STEM

INSTALLER'S GUIDE

8. To prevent a noise within the building structure due to vibration transmission from the refrigerant lines, the following precautions should be taken:

a. When the refrigerant lines have to be fastened to floor

joists or other framing in a structure, use isolation type hangers.

b. Isolation hangers should also be used when refrigerant

lines are run in stud spaces or enclosed ceilings.

c. Where the refrigerant lines run through awall or sill, they

should be insulated and isolated.

d. Isolate the lines from all ductwork.

E. SERVICE VALVE OPERATION

BRASS LIQUID LINE SERVICE VALVE OPERATION

The Brass Liquid Line Service Valve is factory shipped in the seated position to hold Ihctory 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 is not a back seating valve (see WARNING below).

WARNING: Extreme caution should be ex-

ercised 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 ringis missing, do not attempt to open the valve. See Figure 4.

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 lull open with a 1/4 turn counter- clockwise. See Figure 5.

BRAZING REFRIGERANT 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 minimizing the use of sharp 90 ° bends.

3. Insulate the entire gas line and its fittings.

4. Do NOT allow uninsulated liquid line to come in direct contact with bare gas line.

5. Precautions should be taken to avoid heat damage to

the pressure tap valve core during brazing. It is recom- mended that the pressure tap port valve core be removed

and a wet rag wrapped around the valve body. NOTICE: Use care to make sure that no moisture enters

pressure tap port, while wet rag is being used.

6. Remove braze shield from clear plastic bag. Soak pad in water and place over suction and liquid lines to protect unit finish. See Figure 6. Discard pad when finished with brazing.

CORE

Pub. No. 18-BC39D6-4 PAGE 3

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