°

It's Hard To Stop A Trane?

INSTALLER'S

GUI E

Library

Product Section

Product

Model

Literature Type

Sequence

Date

File No.

Supersedes

TWP-I N- 1C

18-BC28D 11-4

Service Literature

Unitary

Split System Heat Pump

TWP

Installer's Guide

1C

December I999

SV-UN-S/SP-TWP-IN-IC I2/99

TWP-IN-1B

Model:

TWP018,024,036,048C &TWP030,060D

IMPORTANT -- This Document is customer upon completion of work.

property

Heat Pumps and is to remain with this unit.

Please return to service infbrmation pack

These instructions do not cover all variations nor provide for every possible contingency in systems to be met in connection with installation.

All phases of this installation must comply with NATIONAL,

CODES.

Should further information

STATE be

AND desired or

LOCAL should particular problems arise which are not covered sufficiently fbr the purchaser's purposes, the matter should be referred to your installing dealer or local distributor.

A, GENERAL

NOTICE: These outdoor may be used with indoor

Tube, Thermostatic

Flow Control Check Valve units, units

Expansion except equipped

Valve

(F.C.C.V.) for the with

TWPO6OD,

Capillary or the Accutron assembly for refrig-

TM erant approved flow control.

with indoor

The TWP06OD units equipped outdoor units are with thermostatic only expansion valve refrigerant controls.

Check for transportation damage after unit is uncrated.

Report promptly, to the carrier, 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 the time of installation which steps which should will help assure be taken the efficient at operation of the unit.

It is recommended tions be taken for units being installed snow peratures accumulation occur.

and prolonged that these in areas below freezing precauwhere tem-

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 inc_ge of snow and ice (melted during d@x)st cycle) prior to its refbeezin_.

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 drif_bs. If not possible, a snow drif_b 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

TOP DISCHARGE --- UNRESTRICTED

5 FT. ABOVE UNIT restriction of airflow to and fi'om 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 deli'ost 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.

1999

I

;TALLER'S

G

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 from any structure to prevent directly on the unit.

excess roofrun-offwater from pouring

3. The top discharge area must be unrestricted

(5) f_et above the unit.

for at least five

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 ing structure.

to prevent transmission to the build-

5. The maximum length of refrigerant lines from outdoor to indoor unit should NOT exceed sixty (60) f_et.

6. Maximum diffbrence in elevation

(60) feet.

should not exceed sixty

NOTE: Consult Ref)'t:erantPtpuzgSoflware ,Pub.No.

_2-3312-01.

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

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

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

10. 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

Aecutron

TM 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 u nit is factory shipped with a diffbrent 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 nameplate attached to the outdoor will have correct orifice

BAYFCCV --- A for rated performance.

unit.

Outdoor size specified unit as

D. INSTALLING REFRIGERANT LINES

Pressure taps are provided on the service valve plate and on service valve of outdoor unit for 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

PAGE 2

COMPONENTS

ACCUTRON_M

/

BODY

BRAZE TYPE iNDOOR END

SEALING CAP

AS SHIPPED _

\

ADAPTER

FLOW CONTROL

CHECK VALVE

(F.C.C.V.)ORtFICE

[_

_:--------LIQUID LINE

FIELD SUPPLIED requirements.

This should be thoroughly checked out befbre ordering refrigerant line sets.

The gas line nmst always be insulated.

The units are factory charged with the system charge required when using fil_een (15) feet of connecting line.

Unit nameplate charge is the stone.

Final refrigerant charge adjustment necessary, use the Charge Charts in the outdoor unit Service

Facts.

is

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

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

NOTE: Large diameter tubing will be very: di[ficult to rebend once

it has been shc:ped.

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 clear.

The location of this hole (if practical) should be just about the wall plate which is resting on the fbundation.

5. Be sure the tubing is of sufticient length.

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

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

8. To prevent a noise within the building structure vibration transmission from the refrigerant lines, due the following to 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.

Pub. No. 18-BC28D11-4

STALLER'S GUI

®

HEX HEADED

VALVE SYSTEM_

LIQUID LINE SERVICE VALVE

UNIT SiDE OF

SERVICE VALVE

RETAINING RING

LIQUID LINE

CONNECTION 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 a wall or sill, they should be insulated and isolated.

d.

Isolate the lines fl'om all ductwork.

E. SERVICE VALVE OPERATION

BRASS LIQUID

OPERATION

AND GAS LINE SERVICE VALVE

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 is not a back seating valve (see WARNING below).

WARNING: Extreme should

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 ring is missing, do not attempt

to open the valve.

See Figure 3.

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 4.

BRAZING REFRIGERANT LINES

1. Boil)re brazing, remove plugs from external copper stub tubes.

(?lean internal and external surfaces of stub tubes prior to brazing.

2. Cut and fit tubing minimizing the use of sharp 90 ° bends.

Pub. No. 18-BC28D11-4

3. Insulate the entire gas line and its fittings.

4. Do NOT allow uninsulated contact with bare gas line.

liquid line to come in direct

5.

Precautions the pressure should tap valve mended that the pressure and a wet rag wrapped be taken core during

to avoid brazing.

heat damage

It is recomto tap port valve around the valve core body.

be removed

NOTICE: pressure

Use care to make tap port, while sure that no wet rag is being moisture used.

enters

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 5. Discard pad when finished with brazing.

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.

8. Braze using accepted good brazing techniques.

LEAK CHECK

CAM TI ON: Inscroncompressor

dome temperatures compressor, may cause may be minor hot.

Do to severe not touch burning.

top of

IMPORTANT: fore attaching

Replace hoses pressure for evacuation.

tap port 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

360 psi. Use soap bubbles or other leak-checking methods to see that all field joints are leak-free!

If not, release pressure; then repair!

UNITSIDE

OF VALVE

GAS LiNE SERVICE VALVE

CAP_._8

ONLY

PRESSURE TAP PORT

/

GAS LINE CONNECTION

CAP_

CORE

&

_-VALVE STEM

PAGE 3

I ;TALLER'S G

HEAT SHIELD

O o

SYSTEM EVACUATION

NOTE: Since the outdoor unit has a refi'igerant charge, the gas and liquid line valves must remain closed.

1. Upon completion ofleak check, evacuate the refi'igerant lines and indoor coil before opening the gas and liquid line valves.

2. Attach appropriate liquid line pressure taps.

hoses from mani%ld gauge to gas and

NOTE: Unnecessary switching of hoses cart be avoided and complete evacuation of all lines leading to sealed system cart be accomplished with mani[bld center hose and connecting branch

hose to a <ylinder of HCFC-22 and vacuum pump.

3. Attach center hose of mani%ld gauges to vacuum pump.

4. Evacu ate until the micron gauge reads no higher than 350 microns.

5. Close off valve to vacuum pump and observe the micron gauge.

Ifgau ge pressure rises above 500 microns in one (1) minute, then evacuation is incomplete or system has a leak.

6. If vacuum gauge does not rise above 500 microns in one

(1) minute, the evacuation should be complete.

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 VENT REFRIGERANT

ATMOSPHERE.

INTO THE

8. Close valve on HCFC-22 supply cylinder.

Close valves on manifbld gauge set and remove refrigerant charging hoses fi'om liquid and gas pressure tap ports.

NOTE: A 3/16" Allen wrench is required to open liquid line service valve. A 1/4" Open End or Adjustable wrench is required

PAGE 4

to ()pen gas line valve.

An Adjustable or 314" Open End wrench is required to take off the valve stem crop.

9. The liquid line shut-off valve can now be opened.

Remove shut-off' valve cap.

Fully insert hex wrench into the stem and baekou t counterclockwise until valve stem just touches retainer ring (approximately five (5) turns) observing WARNING statement.

See Figure 3.

10. Replace liquid service pressure tap port cap and valve stem cap.

These caps MUST BE REPLACED to prevent leaks.

Replace valve stem and pressure tap cap finger tight, then tighten an additional 1/6 turn.

11.

The gas valve can now be opened.

Open the gas valve by removing the shut-offvalve cap and turning the valve stem 1/4 turn counterclockwise,

See Figure 4.

using 1/4" Open End orAdjustable wrench.

12.

The gas valve is now open fbr refrigerant flow. Replace valve stem cap to prevent leaks.

See Figure 4.

If refrigerant lines are longer than 15 f>et and!or a different size than recommended, it will be necessary to adjust system refrigerant charge upon completion of installation.

F. ELECTRICAL CONNECTIONS

WARN IN G: When or servicing this equipment, ALWAYS exercise tions to avoid the possibility basic

of electric safety shock.

precau-

1. Power wiring and grounding of equipment must comply with local codes.

2. Power supply must agree with equipment nameplate.

3. Install a separate disconnect switch at the outdoor unit.

4. Ground the outdoor unit per local code requirements.

5. Provide flexible electrical conduit whenever vibration transmission may create a noise problem within the structure.

6. The use of color coded low voltage wire is recommended simplif_¢ connections between the outdoor unit, the thermostat, and the indoor unit.

to

Table 1 --- NEC Class II Control Wiring

24 VOLTS

WIRE SIZE

*22 AWG

MAX. WIRE LENGTH

30 FT.

20 AWG

18 AWG

100 FT.

150 FT

16 AWG

14 AWG

225 FT.

300 FT.

*If 22 AWG is used, make sure it is high quality wire.

Pub. No. 18-BC28D11-4

STALLER'S GUI

7. Table i defines maximum total length of low voltage wiring from outdoor unit, to indoor unit, and to thermostat.

8. Mount the indoor thermostat in accordance with instruction included with the thermostat.

Wire diagram (included in these instructions).

per appropriate hook-up

G. ELECTRICAL HEATERS

Electric heaters, if used, are to be installed in the air handling device according to the instructions dler and the heaters.

accompanying the air han-

H. START KIT

All single phase units, except TWP060D, have quick start components which are factory installed.

I.

OUTDOOR THERMOSTAT

An outdoor thermostat TAYSTAT250A may be field installed.

For data see wiring diagrmn attached to unit and instruction sheet packaged with outdoor thermostat.

J.

DEFROSTCONTROL

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 difference between the ambient and the colder coil temperature is the ditI_rence or delta-T measuremerit.

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 defi'ost.

The coil sensor also serves to sense outdoor coil temperature for termination of the defi'ost cycle.

FAULT DETECTION

A fault condition is indicated by the flashing light on the defl'ost control inside the heat pump control box.

In normal operation, the defl'ost 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.

PIN IDENTIFICATION (See Figure 6)

1. TEST_COMMON (Shorting any of the other pins to this pin causes the function of the other pin to be executed.

Leaving this pin open results in the normal mode of operation.)

®

PiN IDENTIFICATION

Z o o o

I.-

0_

I

2. TST = Test (Shorting TEST_COMMON to this pin speeds up all defi'ost board timings.)

3. FRC_DFT = Forced Defi'ost (ShortTEST COMMON to this pin for two (2) seconds to initiate a forced defl'ost.

Remove the short affuer defi'ost initiates.)

DEFROSTCONTROLCHECKOUT

Normal operation requires: a.

LED on board flashing I time/second.

b.

24V AC between R & B.

c.

24V AC between Y & B with unit operating.

d.

Defrost initiation when FRC_DFT pin is shorted to

TESTCOMMON pin.

If a defl'ost control problem is suspected, ref>r to the service information in control box.

WARNING:

DoNOT toT1

(ODS-A) terminal.

ODS-A thermistor WILL BE BLOWN.

K. OPERATIONAL AND CHECKOUT PROCEDURES

Final phases of this installation are the unit Operational and

Checkout Procedures which are found on page 8 of this instruction.

L. COMPRESSOR SUMP HEAT

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 compressor (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 startup.

Record the "POWER APPLIED DATA" on the designated lines below:

Time

By

A.M./P.M.

Date

Electrician

(SEE WIRING DIAGRAMS )

LL a t

LL

Pub, No, 18-BC28D11-4 PAGE 5

I ;TALLER'S G

A TYPICAL FIELD WiRiNG DIAGRAM FOR SPLIT SYSTEM HEAT PUMPS

TWP018=060 WITH AiR HANDLERS

A TYPICAL FIELD WIRING DIAGRAM FOR TWP018-060 HEAT PUMPS

WITH VARIABLE SPEED AIR HANDLERS AND SUPPLEMENTARY HEATERS

NOTES:

1.

POWER W_RING AND GROUNDING OF EQUIPMENT MUST COMPLY WITH

LOCAL CODES.

2.

BE SURE POWER SUPPLY AGREES WITH EQUIPMENT NAMEPLATE

3.

LOW VOLTAGE WIRING TO BE NO 18 AW.G.

MINIMUM CONDUCTOR

4.

USE COPPER CONDUCTORS ONLY.

5.

POLARIZED PLUG SECTION PM-A iS ATTACHED TO HEATER CONTROL

BOX.

SECTION 1-PF IS FACTORY WIRED INTO AIR HANDLER.

6.

TERMINAL W2 WILL HAVE INTERNAL

CONNECTIONS

CONTACTOR

ONLY IF SECOND

IS USED BY THE HEATER

CONTROLLING POWER TO ELECTRIC

HEATING ELEMENTS IF SECOND (BH)

CONTACTOR

CONNECTIONS

IS USED, THEN FIELD

TO W2 CAN BE

H # _,

0, J) JC I (N

SNLE ''E

OMITTED AS APPROPRIATE

7.

IF ODT iS NOT USED.

THEN CONNECT

APPROPRIATE

W2 ON LVTB

JUMPER FROM W1 TO

8.

IF HUMIDISTAT IS NOT USED,

CONNECT JUMPER FROM "R" TO "BK"

FOR FULL TONNAGE AIRFLOW IN

COOLING

9.

CONNECT IN THIS MANNER IF OD

UNiT HAS "F" CONNECTION

10. CONNECT W3 TO W2 ONLY IF USING

HEATER WITH 3 HEATER STAGES

I

I s,O0 bl i I!bl0_

BA?28}', 38

A

/F i U'i

Pr4 s_ ............

'pi If ,i }

_/' 8E

IOTE O

[OT8

NOlES 6 & Z

,_;[;-IA }[ R

IIUMI) _TAi

N0][ 8

C0[}S

=C:

PAGE 6

.......

] _g> W;li N0

....................................

_ '_Y[;

] ',':;" WI, N0 From Dwg. 21B800255 Rev. 2

Pub. No. 18-BC28D11-4

_EFV

E D

COMRONE

_]CAL

PEr PFiEVA

CE A El

AND RE R_GE

S C ARANCE%

]NO COD,

}-_

AX

STALLER'S GUI

TWP018=060 OUTLINE DRAWING

NOTE: ALL DIMENSIONS IN MM (INCHES).

ii ii

!!

!!

II II ii

II ii

II ii

II

II

II

JJ

II

JJ

ii ii

ii

II

II

II

JJ

II

JJ q

A

_-<: /O: O_SCI_ARG

LNR S[IRK}IED

E T ABOV

Pl AD ) SO

L

RDO

AF_EA

IOR

IT.

L

RUN

AI

S40UI D

[ A}I VE

',T SIq©LL D BE

Oi F 7FA E:/

DOES

AN[}

NOT

SI(}("

ROM WA[

5ilRUBBERY

I W 0 S )E S U

POJR

B A

D RECTI

EAS'

AND A

ON TWO

S(R

SIDES,

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0% ( _'_

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OT

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LR

E S R '_C I E D.

,

(B)

I (2} m

\_

\\\\\\

"

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"D"()

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CONNECTION

SER,/[CE

_SA :

'H]TB

Y/4 VE

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/4" l)

S/\E F[ ARE t: J, I ] N G i Q;J]D

[:'_O,D,

(ONNEC

PR-SSURE

]NE

FEMA

ION

_AP

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E BRAZED

W II I/4"

Y

VA

'NG,

SA

VE,

: A i

FG, 1

229 (9)

I

12)' t i

(:N

4 8

Pub, No, 18-BC28D11-4

FI@_ 2

GAS LINE BALL SERVICE VALVE,

BALL 1/4 TURN "D" O.D. FEMALE

BRAZED CONNECTION WITH 1/4"

SAE FLARE PRESSURE TAP FITTING

_

]QUID

O,D,

ONNE', i ARE

[NE

EMA

] '01

NRESSJR

SERV CE

E BRAZED

A'] H

VA

/4 _ SAE

VE, lAP TT]NC

MODELS

TWP0 ! 8C

TWP024C

TWP030D

TWP036C

FIG.

1

2

2

2

A

24-3/8

28-5/8

32-3/4

37

B

28-1/4

32-7/8

32-7/8

38-7/8

TWP042C

TWP048C

TWP060D

2

2

2

37

37

37

NOTE: TABLE IN INCHES ONLY.

38-7/8

38-7/8

38-7/8

C

24-5/8

28-3/4

28-3/4

34-3/4

34-3/4

34-3/4

34-3/4

D

5/8

3/4

3/4

7/8

7/8

1-1/8

1-1/8

E

1/4

5/18

5/18

3/8

3/8

3/8

3/8

From Dwg. 21D147562 Rev. 6

PAGE 7

I ;TALLER'S G

CHECKOUT PROCEDURE

After installation has been completed, it is recommended that the entire system be checked against the following list:

1. Refrigerant Line, Leak checked ..........................................................................................................

[ ]

2. Suction Lines and Fittings properly insulated ......................................................................................

3.

Have all Refrigerant Lines been secured and isolated properly?

........................................................

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 registers and return grilles 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 speed tap being used?

(Indoor blower motor) ....................................................................

[ ]

[ ]

[ ]

[ ]

SYSTEM OPERATIONAL CHECK

IMPORTANT: To prevent compressor damage which may result from the presence of LIQUID refrigerant in the crankcase, these procedures should be followed at initial Start-Up and at anytime the power has been off for 12 hours or more.

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 d the designated lines, in Step 2.

2. Start-Up Time

Time Lapse

A.M./P.M.

Hours

Power Applied Time

Minutes.

A.M./P.M.

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 superheat charging, 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 REQUIRE A SEPARATE CIRCUIT?

1. Be sure the fused disconnect switch is "OFF," and safety label (if any) is attached ................................

2. Check on field wiring for sound connections and grounding according to codes ....................................

[ ]

[ ]

3. Check fuses for proper size per nameplate specifications .....................................................................

[ ]

4. Check control box panel -in place and secured ..................................................................................

[ ]

NOTE: OPERATION OF HEATERS MUST BE CHECKED DURING THE OPERATION CHECK OF THE TOTAL

SYSTEM.

Technical Literature- Printed in U.S.A.

PAGE 8

The Trane Company

6200 Troup Highway

Tyler, TX 75707

Pub. No. 18-BC28D11-4

P.I.