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
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,
54
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
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
CONTROL PANEL
A
B
D
C
B
A
D
C
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
1
10
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
1
10
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
1
10
10 0
10 100 1000 10000
WATER FLOW RATE - GPM
PRESSURE DROP - FT.WG. .
A1R
A2R
A3R
B1R
C1R
A
1
R
A
2
R
A
3
R
B1R
C1
R
1 PASS
2 PASS
1
10
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 -
1
10
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
M1
R
M2
R
M3
R
1
10
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 -
1
10
10 0
10 10 0 10 0 0
WATER FLOW RATE - GPM
PRESSURE DROP - FT.WG. .
J1R
K1R
K2R
L1R
L2R
L3R
M1
R
M2
R
M3
R
1
10
10 0
100 1000 10000
WATER FLOW RATE - GPM
PRESSURE DROP - FT.WG. .
H1
R
H2
R
H3
R
H4
R
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 -
1
10
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
1
10
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 -
1
10
100
10 0 10 0 0 10 0 0 0
WATER FLOW RATE - GPM
PRESSURE DROP - FT.WG. .
T2R
T3R
U1R
V1R
V2R
V3R
W1
R
W2
R
Y1R
1
10
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 -
1
10
10 0
100 1000 10000
WATER FLOW RATE - GPM
PRESSURE DROP - FT.WG. .
T2R
T3R
U1R
V1R
V2R
V3R
W1R
W2R
Y1R
1
10
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 -
1
10
10 0
100 1000 10000
WATER FLOW RATE - GPM
PRESSURE DROP - FT.WG. .
P1R
Q1R
Q2R
R1R
R2R
R3R
T1R
T2R
T3R
1
10
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 -
1
10
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
1
10
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
- 20 -
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