Trane RAUJ-C20 Installation, Operation And Maintenance Manual page 67

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Table of Contents

W W A A R R N N I I N N G G

P P r r o o p p e e r r F F i i e e l l d d W W i i r r i i n n g g a a n n d d G G r r o o u u n n d d i i n n g g

R R e e q q u u i i r r e e d d ! !

F F a a i i l l u u r r e e t t o o f f o o l l l l o o w w c c o o d d e e c c o o u u l l d d r r e e s s u u l l t t i i n n d d e e a a t t h h o o r r

s s e e r r i i o o u u s s i i n n j j u u r r y y . .

A A l l l l f f i i e e l l d d w w i i r r i i n n g g M M U U S S T T b b e e p p e e r r f f o o r r m m e e d d b b y y q q u u a a l l i i f f i i e e d d

p p e e r r s s o o n n n n e e l l . . I I m m p p r r o o p p e e r r l l y y i i n n s s t t a a l l l l e e d d a a n n d d g g r r o o u u n n d d e e d d

f f i i e e l l d d w w i i r r i i n n g g p p o o s s e e s s F F I I R R E E a a n n d d E E L L E E C C T T R R O O C C U U T T I I O O N N

h h a a z z a a r r d d s s . . T T o o a a v v o o i i d d t t h h e e s s e e h h a a z z a a r r d d s s , , y y o o u u M M U U S S T T f f o o l l l l o o w w

r r e e q q u u i i r r e e m m e e n n t t s s f f o o r r f f i i e e l l d d w w i i r r i i n n g g i i n n s s t t a a l l l l a a t t i i o o n n a a n n d d

g g r r o o u u n n d d i i n n g g a a s s d d e e s s c c r r i i b b e e d d i i n n N N E E C C a a n n d d y y o o u u r r l l o o c c a a l l / /

s s t t a a t t e e / / n n a a t t i i o o n n a a l l e e l l e e c c t t r r i i c c a a l l c c o o d d e e s s . .

Before installing any connecting wiring, see drawings

Dimensions and Weights chapter for the electrical

access locations provided on the unit. Install

appropriately sized control wiring for the 115 volt

electrical components as required by the application.

Since the unit-mounted 115V control power

transformer (1T1) is provided on all units, it is not

necessary to run a separate 115 volt control power

source to the unit.

N N o o t t e e : : All 200/230V units are shipped with transformer

1T1 wired for 200 volt operation. If the unit is to

be operated on a 230V power supply, rewire the

transformer as shown on the unit schematic.

N N o o t t e e : : All field wiring must conform to NEC guidelines

as well as state and local codes.

Controls Wiring — 115 VAC

W W A A R R N N I I N N G G

H H a a z z a a r r d d o o u u s s V V o o l l t t a a g g e e ! !

F F a a i i l l u u r r e e t t o o d d i i s s c c o o n n n n e e c c t t p p o o w w e e r r b b e e f f o o r r e e s s e e r r v v i i c c i i n n g g c c o o u u l l d d

r r e e s s u u l l t t i i n n d d e e a a t t h h o o r r s s e e r r i i o o u u s s i i n n j j u u r r y y . .

D D i i s s c c o o n n n n e e c c t t a a l l l l e e l l e e c c t t r r i i c c p p o o w w e e r r , , i i n n c c l l u u d d i i n n g g r r e e m m o o t t e e

d d i i s s c c o o n n n n e e c c t t s s b b e e f f o o r r e e s s e e r r v v i i c c i i n n g g . . F F o o l l l l o o w w p p r r o o p p e e r r

l l o o c c k k o o u u t t / / t t a a g g o o u u t t p p r r o o c c e e d d u u r r e e s s t t o o e e n n s s u u r r e e t t h h e e p p o o w w e e r r

c c a a n n n n o o t t b b e e i i n n a a d d v v e e r r t t e e n n t t l l y y e e n n e e r r g g i i z z e e d d . . V V e e r r i i f f y y t t h h a a t t n n o o

p p o o w w e e r r i i s s p p r r e e s s e e n n t t w w i i t t h h a a v v o o l l t t m m e e t t e e r r . .

Install appropriately sized 115 volt control wiring for

the electrical components as required by the

application.

These components may include:

•

Hot gas bypass solenoid wiring

•

Supply fan interlock and control circuit

•

System control switch wiring ("No Control" units)

•

Step controller wiring ("No Control" units)

•

Chilled water pump interlock wiring (EVP units)

•

Chilled water flow switch wiring (EVP units)

•

Outside air thermostat wiring (EVP units)

•

Liquid line solenoid valve(s)

SS-SVX11K-EN

Supply Fan Interlock

Control Options Utilizing an Air Handler

The normally open evaporator fan interlock auxiliary

contacts and the evaporator fan controls; system On/

Off switch, fan starter/contactor, and overloads, must

be wired as illustrated in the appropriate interlock

connection wiring diagram for the specified

application.

EVP Flow control (6S58)

The flow switch is a binary output device and must be

wired within the interlock circuit. Before installing the

control wiring, refer to the remote panel illustration for

the electrical access into the panel. Refer to the field

connection diagram for the specific connection points

inside the remote panel.

EVP Circulating Pump Interlock

Pump operation and sequence is the responsibility of

the installer. During compressor operation, the fluid

flow through the chiller must be maintained. The field

provided; ON/OFF switch, pump starter/contactor,

auxiliary contacts and overloads (OLs) must be

installed as part of the system's interlock circuit to

disable the compressors in the event the circulating

pump shuts down or is turned off.

N N o o t t e e : : Due to the location of the 5S1 switch within the

circulating pump control circuit, it can be used as

a system ON/OFF switch.

Outside Air Thermostat (5S57)

A field provided outside air thermostat must be

installed within the interlock circuit to prevent the

system from operating below its workable temperature

range. Before installing the control wiring, refer to the

remote panel illustration for the electrical access into

the panel. Refer to the field connection diagram for the

specific connection points inside the remote panel.

Refer to the "EVP Chiller Controls" section for

temperature requirements.

Hot Gas Bypass (All control options)

If hot gas bypass is required, refer to the "Refrigerant

Piping" illustration for supporting equipment tubing

connections. Refer to the specific control option field

connection diagram terminal connections for the hot

gas bypass solenoid coils.

Controls Wiring — 24 VAC