Hvac Notes

HVAC

1. Heat
V entilation
Air

= Condition

2. PART OL

3. PARTO Contents

DA e 3
© Make up unit
@ Air Separator

©) Cooling Tower =
© Chemical treatment Unit....... © ©

® Photo From real site @ ©
© Syihbol From IFC dana ¡0-0

5. HVAC Chillers

Vapor Compression Chillers

Ss ne |

Mecpreening] Fonte ] [seen —] [Seat

acosan “i costeo rai Codes

6. ® 7

D US

Al cooled scrol chier Water cooled scroi cher Al cooid screw cher

=

Food water chiller Single compressor Water cooled Double compressor water cooled

Scrol type plastic injection water _Brewery/beverage glycol chier 5 °C Chemical water chier

7. Centrifugal chiller

Screw chiller Scroll chiller

a

8. EAC — ©

® Chilled water System

® Chiller
Ate Cooled

9. ® Water Cooled chiller
O
SS

ica

© Compressor
O High pressure gauge
- © high/ loo pressure protector
@ Condenser
© shutoff valve _
© Filter dryer
O shutoff Valve
© Liquid mirror
© Sowraid valve.

10. 1- Chiller

2- Pumps

3- Make up unit
L- Air Separator
5- Air handling unit
6- Fan Coil unit

11. 25)

water cooled chiller system Sample

12. @PUMP ~

13. PUMPS EY

N 7
salio Lag Aa
DYNAMIC POSITIVE
DISPALCEMENT
ves ia sa Bulge das
SPECIAL EFFECT CENTRIFUGAL ROTARY RECIPROCATING
Jit) jus col) er
JET GAS LIFT annie ots Con
DIAPHRAGM PLUNGER PISTON
sh Bs sage GS e IE
RADIALFLOW AXILFLOW ARE | ul
DOUBLE SINGLE
ACTING ACTING
oa Azul uayai y Lui
SCREW Gi

PISTON SLIDE VANE LOBE

14. Pump Types N
In line pump wae
Fay wan

15. POSITIVE
DISPLACEMENT
PUMP TYPE
CHART

Positve

‘Seen

‘Sage acing

16. > «2 ® k
E mt y
e Far

/ Ih Hall |
e MA TL

A Car
ñ ea bo it
CA A h

17. @ MAKEUP
UNIT

18. ee
de

@® Make Up Unit >
Na oS.
© IF the pressure decrease NV
Inthe Sysiem because cd o N
any veasen

It work to make up Me

-0-0-0-0 |
Gate valve a
-@& stramer ns

_@@ Check valve

TSS Oe oe Le

1000 Union

_© Pressure reducing Valve

_@ Expansion tank ©

GA) Ball valve \
Sa

Helio’

19. Backflow preventer

‘Whats backfon? Ÿ
Backflow isthe undesirable reveal ofthe fon of water rom ts intended drecin nan ppeine or punbng system. Bacon SN
dangerous because can alow dking ale n pubng systems to become contaminated nd unusable

Whats backto preventer?

Bach prevent are mechanical pm devices tae na bing syste to present water om owing baca inte
System. Aprope installed ested and mantaned Ecko preventer ate senice nance to bulking or proper can et
prevent bc water unico qua rm Ton back the comm wae system

‘THE PRESSURE REDUCING VALVE : DEFINITION

‘This vate reduces the pressure o the wale a goes trough i, and is used lo bl a regle and consta! vale ais
out

lis insted ae ler mains (x a bunglo as for a fa) prolecs Ihe whol instalaion om problems due Lo excess
pressure : noses ne ps, ale hammer, pases, premalue wear of household electrical aplances and taps.

‘The pressure reducing vales are opel alot.

20. © ;

Expansion tank QM

Diaphragm Heat transfer fluid mixture
mg

FE 2
Air or nitrogen Air or nitrogen Airor nitrogen
cushion cushion cushion

> ee

AA. When system is filed, no fluid enters tank when cushion and water pressure are in
equilibrium

B. As temperature increases. diaphragm moves to accept heat transfer fluid mixture

©. When fluid rises to maximum, lull acceptance ol expansion is achieved

\
SS

21. @ AIR
SEPARETOR

22. Air Separator

Function
- To enable the cold Feed and h
Nent pipe to be joined closely de
to gether into a Correct
layout to Serve the system. |

~The grouping of the Gnnection|
Causes turbulence oP water

Flee inthe separater which, |

in tum removes air from the
System

- This reduces noise in the system and lowers the
risk of Corrosion.

Air Separator Flow Pattern

Optional 204 Stainiess

eet stainers 3718

andtarger debris >
pure te

flow dlrection pend slows
{the aiethrotigh the vent:

Bevented to atmosphere
Gir Elimination system)
Savected to plain

inter —|

24. © COOLING

TOWER

25. Cooling Tower

Function

~ Decrease the temprature oF
Water for the Condenser by water
Spray on a large area to achive
maximum touching with air
then the water evaporates with
tne heat.

¿All lod! zos

À

aout
a

26. Cooling tower types

A- AS per Air entering,

1- Natural draft
Natural circulization
for the air

1- Open cooling tower
water spray from up
and take the heat from air

B- AS per heat removing,

27. @ CHEMICAL
TREAT MENT
UNIT

F

(Oy

28. @

Chemical treatment Unit

A SAS
- Nery important for the Life of the System,
because it is a closed System.

- Chemical react with the pipes to form
aprotective thin inside layers,

- Chemical help in maintaining oP PH level,

- ChemiCal remove Corrosive dissolved
oxgyen in the water,

Dosing pump Used to applying the pre defermind
ile of chemical Hy preg HE =

O Mechanical treatment :

Be Fore Commisstoning , System should be
cleaned & Flused has Sd user.

& Filtration:

Used For removing (or reducing) the Sold
particles Cues, "3

©

- ConCrete.

29. Chemical treatment Station <

30. Y

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REAL SITE