Adding Preliminary Charge - Trane RAUJ-C20 Installation, Operation And Maintenance Manual

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S S t t a a r r t t - - U U p p

Table 32. Thermal expansion valve manufacturer settings - no bleed — Danfoss

Standard off the shelf nominal valve settings

Body size

Valve

TGEL 3.5 TR

TGEL 4.5 TR

TGEL 6.5 TR

TGE 10

TGEL 9 TR

TGEL 13 TR

TGEL 15 TR

TGEL 19 TR

TGE 20

TGEL 23 TR

TGEL 31 TR

TGEL 35 TR

TGE 40

TGEL 46 TR

Information in tables above is approximate and

intended to simplify field adjustment by presetting

valves to approximately 18°F superheat for DX evap

coils and 15°F superheat for EVP chillers. Actual

operating superheat will typically be less than 18°/15°F

and varies depending on many factors including those

listed above. Superheat gradient (superheat change

per turn) is also approximate and will not be constant

throughout the valve adjustment range. Check

superheat after startup to confirm proper control.

Tag or mark valve to keep a record of any field

adjustments.

Adding Preliminary Charge

1. Leak check must be completed and system

evacuated.

2. Verify that oil levels are near or above the top of all

compressor sight glasses.

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 . .

3. Insure field supplied unit disconnect is "OFF". Then

verify that the unit 1S2 115 volt control circuit

switch is "OFF" and that reset relays 1K21 & 1K22

have been unplugged to prevent inadvertent

compressor starts.

108

CW turns

SHT, °F

available

14.4

Superheat