Dunham-Bush WCFX 20 Installation, Operation & Maintenance Manual

Brand: Dunham-Bush

Model: WCFX 20

Type: Installation, Operation & Maintenance Manual

This manual is also suitable for

INSTALLATION,

OPERATION &

MAINTENANCE

MANUAL

Form No: MM0422A

R134aR134aR134a

50/6050/60 Hz50/60

INSTALLATION,

OPERATION &

MAINTENANCE

MANUAL

Products That Perform . . .By People Who Care

MODEL:

WCFX Series

ROTARY

SCREW

WATER

CHILLERS

TABLE OF CONTENTS

DESCRIPTION PAGE NO

1.0 GENERAL INFORMATION

1.1 RECEIVING AND INSPECTION. ............................................. 4

1.2 RIGGING AND MOVING .......................................................... 4

1.3 DIMENSIONAL DATA. .............................................................. 4

1.4 APPLICATION PRECAUTIONS. ............................................. 4

1.4.1 Water Connections .............................................................. 4

1.4.2 Chilled Water Flow............................................................. 4

1.4.3 Water Cooled Condenser .................................................... 5

1.4.4 Water Treatment.................................................................. 5

2.0 INSTALLATION

2.1 FOUNDATION ........................................................................... 10

2.2 VIBRATION ISOLATION........................................................ 10

2.3 UNMOUNTED ACCESSORIES............................................... 10

2.4 WATER PIPING CONNECTIONS.......................................... 10

2.5 ELECTRICAL WIRING........................................................... 10

2.6 CONTROLS ................................................................................ 28

2.6.1 Connections....................................................................... 28

2.6.2 Settings.............................................................................. 28

2.7 REQUEST FOR START-UP REPRESENTATIVE............... 28

3.0 OPERATION

3.1 SYSTEM WATER FLOW RATE............................................. 29

3.2 SEASONAL SHUT-DOWN PROCEDURE ............................ 29

3.3 SEASONAL START-UP PROCEDURE.................................. 29

3.4 SAFETY RELIEF VALVES...................................................... 29

3.5 REFRIGERATION CYCLE ..................................................... 29

3.6 OIL MANAGEMENT SYSTEMS ............................................ 30

3.7 HYDRAULIC CAPACITY CONTROL SYSTEM................. 30

3.8 FREEZE PROTECTION........................................................... 34

3.8.1 Standby At Low Ambient Temperatures ....................34

3.8.2 In Operation................................................................. 34

3.8.3 During Maintenance .................................................... 34

4.0 ELECTRICAL

4.1 ELECTRICAL DATA................................................................ 35

4.2 WIRING DIAGRAM.................................................................. 35

4.3 TYPICAL OPERATION ...........................................................35

4.4 Vision 2020i Controller and Terminal...................................... 45

4.4.1 Operator Keypad............................................................. 45

4.4.1.1 The fifteen polycarbonate buttons ................... 45

4.4.2 Status Reading ................................................................ 46

4.4.2.1 Input status key ................................................ 46

4.4.2.2 Output status key.............................................. 46

4.4.2.3 Compressor status key ..................................... 46

4.4.2.4 Setpoint key...................................................... 46

4.4.2.5 Clock key.......................................................... 47

4.4.2.6 Alarm history key............................................. 47

4.4.3 Authorization .................................................................. 48

4.4.3.1 Authorization key............................................. 48

4.4.4 Advanced user key and menu......................................... 48

4.4.4.1 User key............................................................ 48

4.4.5 Technician Key and Menu ........................................... 48

4.4.5.1 Technician status key .................................. 48

4.4.5.2 Technician status key- main menu.............. 48

4.4.5.3 Compressor FLA calibration....................... 49

4.4.5.4 To perform sensor calibration ..................... 49

4.4.5.5 Manual control ............................................ 49

4.4.5.6 Compressor control ..................................... 50

4.4.6 Control Functions......................................................... 51

4.4.6.1 Chilled water pump interlock and flow

switch .......................................................... 51

4.4.6.2 Customer control interlock.......................... 51

4.4.6.3 Anti-recycle timer ....................................... 51

4.4.6.4 On Delay Timer........................................... 51

4.4.6.5 Load control ................................................ 51

4.4.6.6 Ramp control ............................................... 51

4.4.6.7 Staging control ............................................ 52

4.4.6.8 Modmotor setback control .......................... 52

4.4.6.9 Evaporator pressure control ........................ 52

4.4.6.10 Sump Heater Control................................... 52

4.4.6.11 Low pressure cut-off ................................... 53

4.4.6.12 Evaporator Freeze Shutoff .......................... 53

4.4.6.13 High pressure cut-off................................... 53

4.4.6.14 Optical oil level sensor................................ 53

4.4.6.15 High oil temperature thermostat ................. 53

4.4.6.16 Overload protector....................................... 53

4.4.6.17 Phase control relay ...................................... 53

4.4.6.18 Sensor alarm................................................ 54

4.4.6.19 No-stop alarm.............................................. 54

4.4.6.20 Low differential pressure alarm .................. 54

4.5 Calibration Of Screw Compressor Capacity Amps At Full

Load & Minimum Load Percentage ......................................... 54

4.6 Master/ Slave Control Sequence................................................ 54

4.6.1 Sensor Principle of Operation VIA DBLAN

Communication Bus..................................................... 55

4.6.2 Sequence of Operation ................................................. 56

4.7 Vision 2020i Local Area Network (DBLAN)............................ 56

4.8 Network Connection Diagram................................................... 57

4.9 Hardware Setting........................................................................ 57

4.9.1 Addressing the Vision 2020i Controller ...................... 57

4.9.2 Addressing the Vision 2020i Terminal ........................ 58

4.9.3 Vision 2020i Controller LED Status............................ 59

5.0 MAINTENANCE

5.1 GENERAL................................................................................... 60

5.2 PERIODIC INSPECTION......................................................... 60

5.3 MONTHLY INSPECTION........................................................ 60

5.4 WATER SIDE CLEANING OF VESSELS .............................60

5.5 ELECTRICAL MALFUNCTION ............................................ 61

5.6 CHARGING. ............................................................................... 61

5.6.1 Refrigerant Charge ............................................................ 61

5.6.2 Oil Charge ......................................................................... 61

5.7 TROUBLESHOOTING ............................................................. 63

5.8 SAMPLE LOG SHEET.............................................................. 64

SCHEMATIC DIAGRAM, GRAPH AND TABLE

Figure 1.2 Rigging Diagram......................................................5

Figure 1.3 Dimensional Data.....................................................7

Table 2.1 Floor Loading Diagram...........................................11

Figure 2.4 Pressure Drop...........................................................12

Figure 3.5 Piping Schematic......................................................31

Figure 3.7 Continuous Capacity Control System .....................34

Figure 4.2 Typical Wiring Schematic........................................36

Figure 4.3.1 Vision 2020i Keypad.................................................48

Table 4.4.6.6 Ramp Rates For Several Setpoints (In Minutes)....51

Table 4.9.3 LED Status ...............................................................59

Table 5.4 R134a Pressure/Temperature Properties................62

- 2 -

INTRODUCTION

This equipment is a factory built and tested packaged chiller designed for the

purpose of cooling water or other non-corrosive liquid. The liquid to be cooled is

circulated through the tubes of a evaporator where the temperature is reduced to

the desired level. The heat absorbed by the refrigerant in the evaporator is rejected

via the condenser where it raises the temperature of another liquid stream (usually

water) being circulated through the tubes. This heat is usually rejected by a cooling

tower or closed circuit evaporator.

To assure satisfactory operation and to avoid damage to the unit, the installation

should be made by a qualified refrigeration mechanic. The reader of this manual

and those who install, operate and maintain this equipment should have basic

understanding of the principles of air conditioning, refrigeration and electrical

controls. These instructions are general in nature and are for standard catalog units.

Non-standard units may vary in some respects from these instructions.

Dunham-Bush packaged chiller has been manufactured under a careful quality

control system. It has been tested for performance at the factory at specified field

operating conditions as a final verification of reliability. If it is installed, operated

and maintained with care and attention, it will give many years of satisfactory

service.

NOMENCLATURE

WC F X 18 AR D2R B1R NN B

Generation

Heat Recovery

Condenser Code

Water-Cooled Chiller

Flooded Evaporator

X = Screw Compressor

Compressor Code

(Nominal Tons/10)

Single - 10,12,15,18

Dual - 20, 22, 24, 27, 30,

33, 36

Triple - 39, 42, 45, 48, 51,

Electrical Code

AK 200/3/60

AN 230/3/60

AU 400/3/50

AR 460/3/60

AS 575/3/60

CS 400/3/60

Evaporator Code

- 3 -

1.0 GENERAL INFORMATION

1.1 RECEIVING AND

INSPECTION

The unit should be inspected immediately, in the

presence of the carrier's representative, for any

evidence of damage during shipping. Any damage

should be noted on the carrier's delivery receipt

before it is signed. A damage claim should then

be filed by the purchaser against the delivering

carrier as all shipments are made at the

purchaser's risk. The receiving inspection

instructions, sent with the installation instructions,

should also be filled at this time and forwarded to

the Dunham-Bush Industries, M & E Service

Department.

1.2 RIGGING AND MOVING

Each unit has been carefully tested and inspected

at the factory where every precaution was taken to

ensure that it reaches its destination in perfect

condition. It is very important that the installers,

movers, and riggers use the same care in handling

the unit. The unit is designed to be lifted from the

(4) lifting holes in the tube sheets. It can also be

moved on skids placed under the tube sheets. For

proper rigging, see Figure 1.2.

It is important to protect the unit from damage

during storage, rigging and installation. Particular

care should be given to avoid damage to controls

and piping. Do not allow the unit to be used as a

ladder or scaffold!

1.3 DIMENSIONAL DATA

Dimensional outline drawings of the packages are

shown in Figures 1.3. Note especially the space

and clearance requirements necessary for

servicing the unit.

1.4 APPLICATION

PRECAUTIONS

The following instructions are intended to help

assure proper and successful application of your

water chilling machines.

1.4.1 Water Conditions

Standard construction of the evaporator

and condenser used in Dunham-Bush

model WCFX chillers is copper tubes

with steel tube sheets and liquid heads.

These materials are generally suitable for

use with clean fresh water found in most

localities. However, minerals and other

contaminants found in some water

systems may promote aggressive attack

on the tubes or tube sheets, resulting in

failure with serious consequences for the

entire package chiller.

Since Dunham-Bush has no control over

the condition of the water used in these

machines, we can take no responsibility

for failure of tubes or tube sheets due to

water corrosion or erosion. It is

recommended that the buyer obtain the

services of local water treatment

specialists to prescribe water treatment.

1.4.2 Chilled Water Flow

The Dunham-Bush WCFX Packaged

Water Chiller is designed for a constant

chilled water flow rate, even when the

cooling load is varying. The machine

will generally perform satisfactorily with

steady flow rates deviating from design

by as much as +10% / -50%. However,

varying water flow rates can cause

control instability, which will result in

undesirable system effects, particularly

poor control of leaving chilled water

temperature. If two-way valves are used

to control flow through cooling coils,

some means such as an automatic

modulating valve should be provided in

the system to maintain steady flow

through the evaporator.

If chilled water flow rate and/ or load

vary, the variation must be controlled so

that return water temperature does not

vary at a rate exceeding 2°F [1.1°C] per

minute.

If the chilled water system is arranged

for the dual purpose of cooling and

heating, the evaporator must incorporate

valves to prevent the flow of hot water

through it. This can be done with either

manual or automatic shutoff valves, but

water temperature entering the

evaporator must never exceed 90°F

[32°C].

- 4 -

126"

[3200mm]

42" [1067mm]

IF EVAPORATOR

IS INSULATED

FLAP MUST

BE RAISED

TO EXPOSE

LIFTING HOLE

SPREADERS

LIFT

1.0 GENERAL INFORMATION

1.4.3 Water Cooled Condensers

The water-cooled condenser is also

designed for constant water flow rate,

and should be supplied with the design

GPM [m³/hr] ±10%. The condenser must

be protected from rapid changes in

temperature as well. The maximum

allowable rate of change in condenser

entering water is 1°F [0.6°C] per minute.

Fluctuating flow rate or temperature will

cause unstable control of the machine,

resulting in poor control of leaving

chilled water temperature. If a cooling

tower is used to reject heat from the

condensing water loop, it must be

controlled to provide an entering

condensing water temperature which

does not change more rapidly than 1°F

[0.6°C] per minute and does not go

below 60°F [15.6°C]. One or more of the

following methods may be used to

control the tower:

1.4.3.1 A modulating three-way valve

which bypasses tower sprays

at low load and low ambient

temperature.

1.4.3.2 Tower fan staging in response

to a thermostat in the tower

sump. Fan thermostat should

have a differential of at least

20°F [11.1°C] to avoid short

cycling.

1.4.3.3 A modulating three-way valve

which bypasses the cooling

tower to blend warm leaving

condenser water with cold

tower water.

1.4.4 Condensing Water

Treatment

Condensing water tends to leave silt,

algae and mineral deposits in the

condenser tubes. This fouling gradually

decreases unit efficiency. For this reason,

a program of water treatment should be

employed. Also, at regular intervals

depending on water quality, the unit

should be shut down, condenser heads

removed and tubes cleaned. See Section

5.4.

FIGURE 1.2 RIGGING DIAGRAM

Rigging should be done in a manner so that no strain is placed on unit components other than at cable

connection points

WCFX 10, 12, 15, 18

Note: Project unit from cables.

- 5 -

CONTROL BOX

SPREADERS

IF EVAPORATOR

IS INSULATED

FLAP MUST

BE RAISED

TO EXPOSE

LIFTING HOLE

IF EVAPORATOR

IS INSULATED

FLAP MUST

BE RAISED

TO EXPOSE

LIFTING HOLE

SPREADERS

LIFT

61" [1549mm]

126"

[3200mm]

LIFT

52" [1321mm]

126"

[3200mm]

LIFT LIFT

1.0 GENERAL INFORMATION

WCFX 20, 22, 24, 27, 30, 33, 36

WCFX 39, 42, 45, 48, 51, 54

Note: Project unit from cables.

- 6 -

TWO PASS RIGHT HAND ARRANGEMENT SHOWN

1.0 GENERAL INFORMATION

FIGURE 1.3 DIMENSIONAL DATA

WCFX 10, 12, 15, 18

- 7 -

TWO PASS RIGHT HAND ARRANGEMENT SHOWN

1.0 GENERAL INFORMATION

WCFX 20, 22, 24, 27, 30, 33, 36

- 8 -

1.0 GENERAL INFORMATION

WCFX 39, 42, 45, 48, 51, 54

- 9 -

2.0 INSTALLATION

2.1 FOUNDATION

A flat, level concrete foundation or floor capable

of supporting the weight of the unit must be

provided. Weights are given in Table 2.1. The

unit must be leveled to within 1/16" per foot

[5.2mm per meter] for proper operation.

2.2 VIBRATION ISOLATION

In case of structure-borne vibration may be of

concern, it is recommended that the unit be

mounted on vibration isolators. Rubber-in-shear

isolators or spring isolators are available for this

unit as optional equipment. If spring isolators are

installed, it is also necessary to provide isolation

in condenser water and chilled water pipes by

means of flexible connectors and in main power

supply conduit through use of flexible conduit.

Isolation of piping and electrical conduit is

desirable in any event, to avoid noise transmission.

2.3 UNMOUNTED

ACCESSORIES

A chiller flow switch, which is shipped in a

separate container accompanying the unit, must

be installed in the external chilled water outlet

piping. It must be located in a horizontal section

on the pipe where there is at least five (5) pipe

diameters on both sides of the flow switch before

any other connections, as indicated in Fig. 1. The

flow switch paddle must be adjusted to the size of

pipe in which the paddle is installed, and the

switch set to trip at approximately 50% of the

design flow. Consult the wiring diagram

accompanying the unit for the electrical

connections to interlock the flow switch with the

control panel.

FIGURE 2.3 FLOW SWITCH

2.4 WATER PIPING

CONNECTIONS

Refer to Figures 1.3. for water piping connection

locations. Note that the condenser water inlet

must be on the bottom. If necessary, evaporator or

condenser headers can be reversed, left to right or

vice versa. Leaving chilled water temp sensor

must be located in leaving chilled water stream.

After the unit has been leveled and isolators (if

any) has been installed and adjusted, evaporator

and condenser water piping are connected. Piping

must be properly supported to avoid stress on unit

water connections. Install air vent valves in all

high connections on evaporator and condenser

headers. Drain valves shall be installed in similar

low points to facilitate gravity draining of the

system. It is important that water systems should

be cleaned before start-up to avoid collecting

debris in evaporator and condenser. The best

solution is to install wye strainers in both systems

upstream of the unit. After the systems are filled

with water, trapped air shall be bled from the

various vent valves. Check for proper flow rates

by measuring water pressure drop across heat

exchangers and reading flow rates from charts,

Figure 2.4. Compare measured flow rates with

values specified on purchase order. Check in

Table 2.1. to see that evaporator and condenser

flow rates fall between min. and max. limits.

2.5 ELECTRICAL WIRING

In connecting power wiring to the unit, the

following precautions should be taken:

- All field wiring shall be in accordance with the

National Electric Code and must comply with

state and local codes.

- Check unit wiring for damage and all terminal

connections for tightness. Unit terminal blocks

are connected with copper conductors only,

and are sized according to ampacity listed on

unit data plate.

- Connections to unit should match the unit

name plate in volts, phase and Hertz. Voltage

must not vary beyond ±10% of name plate

value and voltage imbalance between phases

must not exceed 2% at any time during

operation of the unit.

- Phase sequence to connections L1, L2, L3

shall be in that order. Check with Amprobe

phase sequence adapter PSA-1 or equivalent.

- 10 -

CONTROL PANEL

2.0 INSTALLATION

TABLE 2.1 FLOOR LOADING DIAGRAM

WCFX 10, 12, 15 & 18

WCFX 20, 22, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51 & 54

Point Loading, Lbs [kg]

50Hz 60Hz

UNIT MODEL

WCFX A B C D UNIT MODEL

WCFX A B C D

10AUB1RA1R 827 [1823] 328 [723] 1468 [3236] 899 [1982] 10ARB1RA1R 834 [1839] 334 [736] 1477 [3256] 905 [1995]

12AUC1RA2R 966 [2130] 378 [833] 1710 [3770] 1058 [2332] 12ARC1RA2R 978 [2156] 384 [847] 1721 [3794] 1055 [2326]

15AUD1RA3R 1139 [2511] 458 [1010] 2017 [4447] 1234 [2721] 15ARD1RA3R 1147 [2529] 454 [1001] 2037 [4491] 1244 [2743]

18AUD2RB1R 1186 [2615] 469 [1034] 2108 [4647] 1287 [2837] 18ARD2RB1R 1197 [2639] 484 [1067] 2120 [4674] 1300 [2866]

20AUJ1RH1R 1243 [2740] 1865 [4112] 2249 [4958] 1257 [2771] 20ARJ1RH1R 1291 [2846] 1930 [4255] 2150 [4740] 1290 [2844]

22AUK1RH2R 1353 [2983] 2030 [4475] 2447 [5395] 1369 [3018] 22ARK1RH2R 1383 [3049] 2102 [4634] 2349 [5179] 1416 [3122]

24AUK2RH3R 1376 [3034] 2064 [4550] 2488 [5485] 1390 [3064] 24ARK2RH3R 1430 [3153] 2130 [4696] 2381 [5249] 1429 [3150]

27AUL1RH4R 1547 [3411] 2322 [5119] 2799 [6171] 1559 [3437] 27ARL1RH4R 1600 [3527] 2404 [5300] 2686 [5922] 1600 [3527]

30AUL2RJ1R 1887 [4160] 2839 [6259] 3415 [7529] 1897 [4182] 30ARL2RJ1R 1980 [4365] 2930 [6460] 3270 [7209] 1925 [4244]

33AUL3RJ1R 1932 [4259] 2883 [6356] 3476 [7663] 1934 [4264] 33ARL3RJ1R 1997 [4403] 2981 [6572] 3320 [7319] 1997 [4403]

36AUM1RJ3R 2019 [4451] 3014 [6645] 3634 [8012] 2020 [4453] 36ARM1RJ3R 2090 [4608] 3144 [6931] 3446 [7597] 2088 [4603]

39AUT2RP1R 2289 [5046] 3199 [7053] 3681 [8115] 2337 [5152] 39ART2RP1R 2319 [5113] 3247 [7158] 3711 [8181] 2319 [5112]

42AUT3RQ1R 2585 [5699] 3593 [7921] 4133 [9112] 2578 [5683] 42ART3RQ1R 2596 [5723] 3635 [8014] 4154 [9158] 2596 [5723]

45AUU1RQ2R 2788 [6146] 3892 [8580] 4480 [9877] 2838 [6257] 45ARU1RQ2R 2820 [6217] 3948 [8704] 4512 [9947] 2820 [6217]

48AUV1RR1R 3031 [6682] 4255 [9381] 4892 [10785] 3048 [6720] 48ARV1RR1R 3058 [6742] 4281 [9438] 4893 [10787] 3058 [6742]

51AUV2RR2R 3145 [6933] 4363 [9619] 5009 [11043] 3137 [6916] 51ARV2RR2R 3154 [6953] 4414 [9731] 5044 [11120] 3153 [6951]

54AUV3RR2R 3203 [7061] 4484 [9885] 5125 [11299] 3204 [7064] 54ARV3RR2R 3222 [7103] 4509 [9941] 5154 [11363] 3221 [7101]

Notes: 1.) Refer to dimensional drawings for location of mounting points.

2.) Unit must be lowered onto mounting springs in a level fashion or spring damage may occur.

- 11 -

0.1

10 0

10 100 1000 10000

WATER FLOW RATE - GPM

PRESSURE DROP - FT.WG. .

B1R

C1R

D1R

D2R

E1R

B1R

C1R

D1R

D2R

E1R

1 PASS

2 PASS

10 0

10 10 0 10 0 0

WATER FLOW RATE - GPM

PRESSURE DROP - FT.WG. .

B1R

C1R

D1R

D2R

E1R

2.0 INSTALLATION

FIGURE 2.4 PRESSURE DROPS

WCFX 10, 12, 15, 18 – METRIC UNITS

1.) Evaporator 1 & 2 Pass

2.) Evaporator 3 Pass

- 12 -

0.1

10 0

10 100 1000 10000

WATER FLOW RATE - GPM

PRESSURE DROP - FT.WG. .

A1R

A2R

A3R

B1R

C1R

B1R

1 PASS

2 PASS

10 0

10 10 0 10 0 0

WATER FLOW RATE - GPM

PRESSURE DROP - FT.WG. .

A1R

A2R

A3R

B1R

C1R

2.0 INSTALLATION

WCFX 10, 12, 15, 18 – METRIC UNITS

3.) Condenser 1 & 2 Pass

4.) Condenser 3 Pass

- 13 -

10 0

10 0 10 0 0 10 0 0 0

WATER FLOW RATE - GPM

PRESSURE DROP - FT.WG. .

J1R

K1R

K2R

L1R

L2R

L3R

10 0

100 1000 10000

WATER FLOW RATE - GPM

PRESSURE DROP - FT.WG. .

J1R

K1R

K2R

L1R

L2R

L3R

M1R

M2R

M3R

2.0 INSTALLATION

WCFX 20, 22, 24, 27, 30, 33, 36 – METRIC UNITS

1.) Evaporator 1 Pass

2.) Evaporator 2 Pass

- 14 -

10 0

10 10 0 10 0 0

WATER FLOW RATE - GPM

PRESSURE DROP - FT.WG. .

J1R

K1R

K2R

L1R

L2R

L3R

10 0

100 1000 10000

WATER FLOW RATE - GPM

PRESSURE DROP - FT.WG. .

J1R

J2R

J3R

K1R

K2R

2.0 INSTALLATION

WCFX 20, 22, 24, 27, 30, 33, 36 – METRIC UNITS

3.) Evaporator 3 Pass

4.) Condenser 1 Pass

- 15 -

10 0

10 10 0 10 0 0

WATER FLOW RATE - GPM

PRESSURE DROP - FT.WG. .

H1R

H2R

H3R

H4R

J1R

J2R

J3R

K1R

K2R

10 0

100 1000 10000

WATER FLOW RATE - GPM

PRESSURE DROP - FT.WG. .

H1R

H2R

H3R

H4R

J1R

J2R

J3R

K1R

K2R

2.0 INSTALLATION

WCFX 20, 22, 24, 27, 30, 33, 36 – METRIC UNITS

5.) Condenser 2 Pass

6.) Condenser 3 Pass

- 16 -

100

10 0 10 0 0 10 0 0 0

WATER FLOW RATE - GPM

PRESSURE DROP - FT.WG. .

T2R

T3R

U1R

V1R

V2R

V3R

Y1R

10 0

100 1000 10000

WATER FLOW RATE - GPM

PRESSURE DROP - FT.WG. .

T2R

T3R

U1R

V1R

V2R

V3R

W1R

W2R

Y1R

2.0 INSTALLATION

WCFX 39, 42, 45, 48, 51, 54 – METRIC UNITS

1.) Evaporator 1 Pass

2.) Evaporator 2 Pass

- 17 -

10 0

100 1000 10000

WATER FLOW RATE - GPM

PRESSURE DROP - FT.WG. .

T2R

T3R

U1R

V1R

V2R

V3R

W1R

W2R

Y1R

10 0

100 1000 10000

WATER FLOW RATE - GPM

PRESSURE DROP - FT.WG. .

P1R

Q1R

Q2R

R1R

R2R

R3R

T1R

T2R

T3R

2.0 INSTALLATION

WCFX 39, 42, 45, 48, 51, 54 – METRIC UNITS

3.) Evaporator 3 Pass

4.) Condenser 1 Pass

- 18 -

10 0

100 1000 10000

WATER FLOW RATE - GPM

PRESSURE DROP - FT.WG. .

P1R

Q1R

Q2R

R1R

R2R

R3R

T1R

T2R

T3R

10 0

100 1000 10000

WATER FLOW RATE - GPM

PRESSURE DROP - FT.WG. .

P1R

Q1R

Q2R

R1R

R2R

R3R

T1R

T2R

T3R

2.0 INSTALLATION

WCFX 39, 42, 45, 48, 51, 54 – METRIC UNITS

5.) Condenser 2 Pass

6.) Condenser 3 Pass

- 19 -

10 0

10 100 1000

WATER FLOW RATE - m³/hr

PRESSURE DROP - kPa .

B1R

C1R

D1R

D2R

E1R

B1R

C1R

D1R

D2R

E1R

1 PASS

2 PASS

10 0

10 0 0

1 10 100 1000

WATER FLOW RATE - m³/hr

PRESSURE DROP - kPa .

B1R

C1R

D1R

D2R

E1R

2.0 INSTALLATION

WCFX 10, 12, 15, 18 – S. I. UNITS

1.) Evaporator 1 & 2 Pass

2.) Evaporator 3 Pass

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Dunham-Bush WCFX 20 Installation, Operation & Maintenance Manual

Brand: Dunham-Bush

Model: WCFX 20

Type: Installation, Operation & Maintenance Manual

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Dunham-Bush WCFX 20 Installation, Operation & Maintenance Manual

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