WATER FIRED SINGLE-EFFECT ABSORPTION CHILLER AND CHILLER ... · WATER FIRED SINGLE-EFFECT...

WATER FIRED SINGLE-EFFECTABSORPTION CHILLER AND CHILLER-HEATER

This product is a water fired absorption unit which provides chilled water for cooling or hot waterfor heating in central plant type air conditioning systems. Units with nominal refrigeration capacities of 10, 20, and 30 tons are complete with operating and safety controls. The absorp-tion chiller or chiller-heater is energized by heat medium (hot water) at 158oF to 203oF from a process, cogeneration, solar or other waste heat source.

CONTENTS

INSTALLATION INSTRUCTIONSWFC-SC10, 20, 30WFC-SH10, 20, 30

GENERAL Page• STANDARD SPECIFICATIONS 2• PHYSICAL DATA 3• ACCESSORIES 3• MODEL DESIGNATION 3• CONTROL ADJUSTMENTS 3• EQUIPMENT DIMENSIONS 4• TYPICAL SYSTEM DESIGN 6• INTERNAL WIRING 8INSTALLATION• RECEIVING 10

Page• UNIT NAMEPLATE 10• RIGGING 10• LOCATION 10• FOUNDATION 12• PLACEMENT 12• PIPING 12• ELECTRICAL 15• WATER QUALITY 24• INSTALLATION CHECK AND

REQUEST FOR START-UP 24

GENERAL

STANDARD SPECIFICATIONS

MODEL WFC SC10 SH10 SC20 SH20 SC30 SH30Cooling Capacity (Btu/hr x 1000) 120.0 240.0 360.0 Heating Capacity (Btu/hr x 1000) 166.3 332.6 498.9

Outlet Temperature (oF) Cooling 44.6, Heating 131.0Rated Water Flow (gpm) 24.2 48.4 72.6Evaporator Press. Drop (psi) 8.1 9.6 10.1Max. Operating Press. (psi) 85.3 Water Retention Volume (gal) 4.5 12.4 19.3 Heat Rejection (Btu/hr x 1000) 291.4 582.8 874.2 Inlet Temperature (oF) 87.8 (Standard) Rated Water Flow (gpm) 80.8 161.7 242.5 Cond./Abs. Press. Drop (psi) 12.3 6.6 6.7 Max. Operating Press. (psi) 85.3 Water Retention Volume (gal) 17.4 33.0 51.3 Input (Btu/hr x 1000) 171.4 342.8 514.2

Inlet Temperature (oF)190.4 (Standard)

Temperature Range 158 (min.) - 203 (max.) Rated Water Flow (gpm) 38.0 76.1 114.1 Generator Press. Drop (psi) 13.1 6.7 8.8 Max. Operating Press. (psi) 85.3 Water Retention Volume (gal) 5.5 14.3 22.2

Electrical Power Supply 208V, 60Hz, 3 ph Consumption (W) 210 260 310

Capacity Control On - Off

2

This equipment should only be installed bytrained and qualified personnel who are familiarwith absorption chillers. All precautions in theseinstructions, on tags and labels attached to theunit, must be observed to ensure the safety ofpersonnel and warranty validation.

Each absorption chiller and chiller-heater hasbeen evacuated, charged with lithium bromide-watersolution and tested prior to leaving the factory.

Field wiring connections are located on theleft side and piping connections are located on the rear of each unit.

After the equipment has been installed anAuthorized Yazaki Service Provider will check theinstallation and supervise the initial start-up andoperation of the absorption unit.

CAUTION

THE YAZAKI WARRANTY WILL BE VOIDED IF THE FOLLOWING RESTRICTIONS ARE NOT OBSERVED:

1. DO NOT OPEN ANY SERVICE VALVES BECAUSE SUCH ACTION WILL RESULT IN LOSS OF VACUUM.

2. ALWAYS HANDLE THE EQUIPMENT WITHCARE AND MAINTAIN IN A NEAR VERTICALPOSITION DURING RIGGING. IF THEEQUIPMENT MUST BE TILTED, NOTIFY

THE AUTHORIZED YAZAKI SERVICEPROVIDER FOR INSTRUCTIONS.

3. DO NOT ATTEMPT TO START THE ABSORPTION CHILLER WITHOUT SUPER-VISION FROM THE AUTHORIZED YAZAKI SERVICE PROVIDER.

Chilled/HotWater

CoolingWater

HeatMedium

PHYSICAL DATAMODEL WFC SC10 SH10 SC20 SH20 SC30 SH30

Width (in) 29.9 41.7 54.3Depth (in) 38.2 51.2 63.0Height [Note] (in) 74.8 [75.6] 79.1 [79.9] 80.5 [81.3]Chilled/Hot Water (in) 1-1/2 NPT 2 NPT 2 NPTCooling Water (in) 2 NPT 2 NPT 2-1/2 NPTHeat Medium (in) 1-1/2 NPT 2 NPT 2-1/2 NPTDry (lb) 1,100 2,050 3,200Operating (lb) 1,329 2,548 3,975Type WeatherproofMaterial Pre-painted hot dipped galvanized steelFinish Silver metallic

Note: Dimensions in [ ] include leveling plate.

ACCESSORIES

StandardEye Bolts (4), Shims (6), Fuses (4), Installation Instructions (1) and Operating Instructions (1)

OptionalCooling Water Crossover Pipe Assemblies (WFC-SC20, WFC-SH20, WFC-SC30, WFC-SH30)

MODEL DESIGNATIONWFC -

Water Fired Single-Effect Absorption Chiller/Chiller-Heater

Model Selection: SC...Chiller, SH...Chiller-Heater

Cooling Capacity: 10...10RT, 20...20RT, 30...30RT

CONTROL ADJUSTMENTS

3

Dimensions

Piping

Weight

Cabinet

• Standard Rating Point Standard Control Settings

The leaving chilled water and hot water temperature controls are set at the factory to theStandard Specifications. The Authorized YazakiService Provider can adjust the setpoints with the ACT-3 maintenance checker to accommodate step control on multiple units or

satisfy alternative design temperatures, however, the differential is fixed. Standard factory setpoints are adjustable from 59.9oF to41.9oF (leaving chilled water) and 122.9oF to140.9oF (leaving hot water).

EQUIPMENT DIMENSIONS

WFC-SC10/SH10

WFC-SC20/SH20

Top

RearFront ViewLeft Side

44.9

51.2

41.7

5.9

42.5

79.1

0.8

23.3

34.3

29.8

40.0

4.5 4.532.3

16.7

23.0

20.9

Heat Medium Outlet2 NPT

Heat Medium Inlet2 NPT

Chilled/Hot Water Outlet2 NPT

Chilled/Hot Water Inlet2 NPT

Cooling Water Condenser Inlet 2 Npt

Cooling Water Condenser Outlet2 NPT (3C)

Cooling Water Absorber Outlet2 NPT

Cooling Water Absorber Inlet 2 NPT (3C)

10.4

Note: Cooling Water Crossover Pipe Field Connectons Shown In ( ) Are 3" Sweat Type L Copper.

10.8 10.0

12.0

16.4

6.1

9.0

11.0

37.8

3.5

38.6

7.9

20.8

Cooling Water Crossover (Optional)

4 Eye Bolts For Lifting

Mounting Plate Field Wiring

Junction Box

19.1

4

TOP

3.5

Field WiringJunction Box

31.5

4.9

26.4

29.9

33.1

26.4


Mounting Plate

7.5

38.2

LEFTFRONT REAR0.

874

.8

9.0

6.1

12.516.4

Cooling Water Outlet 2 NPT

Cooling Water Inlet 2 NPT

Heat Medium Outlet1-1/2 NPT

Heat Medium Inlet1-1/2 NPT

Chilled/Hot Water Outlet1-1/2 NPT

Chilled/Hot Water Inlet1-1/2 NPT

18.4

8.7

20.8

19.5

20.1

45.3

3.3 22.8 3.3

Note: Cooling Water Crossover Pipe Field ConnectionsShown In ( ) Are 3" Sweat Type L Copper.

Heat MediumOutlet2 NPT

Heat MediumInlet2 NPT

Chilled/HotWater Outlet2 NPT

Chilled/HotWater Inlet2 NPT

Cooling Water Condenser Outlet

2 NPT (3C)

Cooling WaterCondenser Inlet

2 NPT

Cooling WaterAbsorber Outlet

2 NPT

Cooling WaterAbsorber Inlet

2 NPT (3C)


TOP

REARFRONTLEFT

Cooling WaterCrossover (Optional)

4 Eye BoltsFor Lifting

MountingPlate

Top View

Rear ViewFront ViewLeft Side

49.6

63.0

54.3

55.1

0.8

80.5

5.3

30.7

35.4

37.3

17.3

19.7

23.1

12.5 10.0

12.3

9.0

6.1

16.4

57.5

Cooling Water Crossover (Optional)

3.5 22.5

11.7

50.4

5.5

7.9


Mounting Plate

Field Wiring Junction Box

43.35.3

10.6

22.4 Chilled/Hot Water Inlet

2 NPT

Chilled/Hot Water Outlet2 NPT

Heat Medium Inlet2-1/2 NPT

Heat Medium Outlet2-1/2 NPT

Cooling Water CondenserOutlet2-1/2 NPT (3C)

Cooling Water Condenser Inlet2-1/2 NPT

Cooling Water Absorber Outlet2-1/2 NPT

Cooling Water Absorber Inlet2-1/2 NPT (3C)

Note: Cooling Water Crossover Pipe Field Connections Shown In ( ) Are 3" Sweat Type L Copper.

14.8

5

EQUIPMENT DIMENSIONS

WFC-SC30/SH30

All dimensions shown in inches.

Note: Cooling Water Crossover Pipe Field ConnectionsShown In ( ) Are 3" Sweat Type L Copper.

Heat MediumOutlet2-1/2 NPT

Heat MediumInlet2-1/2 NPT

Chilled/HotWater Outlet2 NPT

Chilled/HotWater Inlet2 NPT

Cooling WaterCondenser Outlet

2-1/2 NPT (3C)

Cooling WaterCondenser Inlet

2-1/2 NPT

Cooling Water Absorber Outlet

2-1/2 NPT


2-1/2 NPT (3C)

TOP

REARFRONT

LEFT

MountingPlate

4 Eye BoltsFor Lifting


Cooling WaterCrossover (Optional)

TYPICAL SYSTEM DESIGN(SINGLE MODULE)

WFC-SC10/SH10

WFC-SC20/SH20WFC-SC30/SH30

6

TYPICAL SYSTEM DESIGN(MULTIPLE MODULES)

2 X MODULES(WFC-SC20/SH20, WFC-SC30/SH30)

7

TERMINALSSYMBOL LOCATION REMARK

Control box

Junction box Field wiringconnections

Control box (I/O board)Connector

8

INTERNAL WIRING

FUSE RATINGSYMBOL AMPS (A) REPLACEMENT

Bussmann model F2 3 GLQ-3 or GMQ-3.2,

rated 300 V AC F11, F12 2

Fuji model FGAO-2,F4 2 rated 250 V ACFT1, FT2 5

SOLUTION PUMP OVERLOAD SETTINGS

SYMBOL WFC MODEL (*208 V AC)SC/SH10 SC/SH20 SC/SH30

THRP 0.4 0.7 2.0

* Power supply tolerance +10%, -5%

L1

L2

L3

G

L1

L2

L3

G

SP

U V W MP

2

SV9

3

FT2 TR5

WFC-TRUL1

TR2

FT1 TR4

F11

F12

TR7

TR8

OV 24V

AC

A1

208VA2

TR1

THRP

MP

208V, 60Hz, 3PHPOWER SUPPLY

JUNCTIONBOX

G

G

SA1RMP RV9

CN12

*

CVR

1 2 6 3 4

1 2 3 6

1 2

54

5 CM2 CTF CM1 PP3A

P3B

A B C D E

A B C D E

F G H

HL

CL

CM3

CHOFF

CHON

H1

C1

CP

P P3A

P3B

CM1

CM2

FD

P1D

P2D

P3D

CTF

OPL

LCOM

EDM

HM

CM

COM

ESOFF

ESON

ESH1

ESC1

LCOM

I

IOCN1

IOCN2

TMC1

CPU

CPU

CPU

S3

EGBON HM CM CHD CHE

S4 S5 S6 S7 S8 S11 S12 S13 S14

S3 S4 S5 S6 S7 S8 S11 S12 S13 S14

CP

TB2

CN-16

LTPVCIRCUIT

LTVP

FEP2EP1ECIRHIRIRSLS AC24VDCPST2IF1IF2

MGC2-4

OUC-5

TB2 TB4TB1

CHE

1F3

EGON

EGON

P3D

P3D

MGC2

EXFRFH(MF)

EGBON(RBL)RCVR

RBPW

SV9OPSPAC24V

AC24V

AC18V

TR-LV

TR9TR11

TR10

F2

F4

SA2

A1 A2

AC15V

MONITORINGUNIT

DC POWER

JUNCTION BOX

I/O BOARD

P2P1

FS1

FS2

CN11

NC

Tr

1 28 9 3 125410 11513141112 76 8 12 9104 119 710 8 4 5 631 211 912 10 6 3 4 1 2 13 1457 8

CNC2-1

CNPV

5 6 3 4 1 2

1 4 1 3 2 4

RP3

HMCHSTN CM OP CHD AL

T B3(MS)

OUC2-GTMC2-2(GSPS)

17

1847351

1

387124 1

371542114543

HC

26

CON

HON

207231183725432

3

6

1

4

12

3

4

1 8 15 16

116 1 3 6

12 3 5 4

8

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

3 1 2

18

THRP

RFH

S14S13S12S11S8S7

S10BO

S9

S6S5S3

SV1

SV10

CNC2-2BPC

S4

S1 S2SV11SV1

RBORP3 RV9 EGS GPSCGPSHRMP

CNC-1

CN13

CN13CN12

MGC-1G

Only installed on SH model chiller-heaters.

TRC3

TRC1 TRC2

OUC-4

PWC

C H

* *

RBO

OPTIONAL I/O BOARD CONNECTIONSTERMINAL DESCRIPTION REMARKSTB No.

INTERNAL WIRINGSYMBOL DESCRIPTION REMARKSP Solution pump

MP Solution pumpmotor contactor

THRP Solution pumpthermal overload

CVR Changeover valve SH model onlyWFC-TRUL1 Class 2 transformer 208/24V AC0

TR-LV Low voltage 24/18,transformer 16 V AC

SA1, SA2 Surge absorbersF2, F4,

FusesRefer to

F11, F12, Fuse RatingFT1, FT2 Table

SV1 Refrigerant freezeprotection valve

SV9 Concentrated solutionbypass valve

SV11 Refrigerant drain valve SH model only

LTPV Refrigerant proportionalcontrol valve

LT Evaporatortemperature sensor

WTO Chilled/hot watertemperature sensor

CTI Cooling watertemperature sensor

HWT Heat mediumtemperature sensor

FS1 Chilled/hot waterflow switch

RMP, RP3, Control relaysRV9, RB0

OPTIONAL JUNCTION BOX CONNECTIONSTERMINAL DESCRIPTION REMARKS1, 2 (DCP) Remote monitoringA (C1) Cooling mode selection RemoteB (H1) Heating mode selection selection ofC (CHON) Start selection COOL, HEAT,D (CHOFF) Stop selection ON, OFFE (CM3) Common 3

CTFCooling tower fan Alternative

control (84.2oF ON, to CTS

80.6oF OFF) temp.control

S3, S4 Microturbine or engine Output(EGBON) override control control S5, S6 Heating mode Output(HM) status S7, S8 Cooling mode *Output(CM) statusS13, S14 General shutdown Output(CHE) alarm status

9

* Optional output status when not used for CWV control.

STANDARD JUNCTION BOX CONNECTIONSTERMINAL DESCRIPTION REMARKS

3 (P1D/P1E) Chilled/hot water pumpthermal overload

4 (P2D/P2E) Cooling water pump Interlocksthermal overload (NC or NO)

5 (FD/FE) Cooling tower fan for thermalthermal overload overload tripHeat medium pump contacts

6 (P3D/P3E) thermal overload or heat medium bypassvalve limit switch

P (P1) Chilled/hot water pump OutputCP (P2) Cooling water pump control

P3A Heat medium pump orheat medium bypass

P3B valveCM1 Common 1 S11, S12 Heat medium pump Output(CHD) control

Outputcontrol (NC)

Outputcontrol (NO)

1

MGC2

3

7,8(ST2)

9,10(IF1)

3,7(IF3)

7,8(CHSTN)13,14(OP)17,18(AL)

Shutdown interlock

Chilled/hot waterfreeze protection

Heat mediumfreeze protection

Chiller-heaterstandby mode

Operating status

General fault alarm

Additionalinterlock (NC or NO)Input controlfrom temp.switch(36.5°F ON,39.2°F OFF)

Outputstatus

OPTIONAL CONTROL BOX CONNECTIONSTERMINAL DESCRIPTION REMARKS

S1, S2 Heat medium supply(RFH) shutdown Output S9, S10 Auxiliary boiler Control(BO)

17, 18 Input

(EGON) Heat available control fromtemp. switch

2, 3 on Cooling water Input control

CN11 (FS2) flow switch from flow switch

RECEIVINGWhen the absorption chiller is delivered to

the job site, inspect for any transit damage. Reportany damage to the carrier and note on the bill oflading. Notify the Yazaki Sales Representative orDistributor before proceeding with the installationof a damaged unit.

UNIT NAMEPLATEThe UNIT NAMEPLATE is located on the

lower right hand side of the front panel on eachabsorption chiller unit. Check that the model number, flow rates and electrical specifications are compatible with the system design and services available.

RIGGINGRemove the crate from the absorption chiller.

When access is restricted, it may be necessary toremove the skid to reduce overall height.

Each unit has four eye bolts in the top panelwhich should be used for lifting.

Care should be taken at all times during rigging and handling of the absorption chiller toavoid damage to the panels and external pipeconnections. DO NOT DROP.

Attach a sling to the four eye bolts in the toppanel as shown in Fig.1 and ensure that the ropeangle is greater than 60O to the horizontal plane.Always carry the absorption chiller in a NEARVERTICAL POSITION. DO NOT TIP OVER.

The dry weight and overall dimensions areshown in PHYSICAL DATA on Page 3 as a guidefor rigging (add 6 in. to overall height for skid).

When moving the absorption chiller, checkthat the route is accessible. The minimum accessdimensions for a skid mounted chiller are shown in Fig.2.

LOCATIONYazaki absorption chillers have a weather-

proof cabinet suitable for either indoor or outdoorinstallation.

Select a location with due consideration forthe proximity of the cooling tower, chilled/hotwater coils and service access.

The minimum space requirements, shown inFig.3, must be provided around and above eachchiller for installation and service access.

Fig. 1 RIGGING

MODEL

DIMENSION WFC-SC10 WFC-SC20 WFC-SC30WFC-SH10 WFC-SH20 WFC-SH30

A 93 98 98 B 63 75 88 C 63 75 88 D 63 75 88

Fig. 2 ACCESS CLEARANCES (IN.)

The roof on which equipment is to be installed shall be capable of supporting the operating weight of the absorption chiller, associated pumps, cooling tower and piping.Install the equipment on a well drained surface ofthe roof at least 6 ft. from the edge. If the roof ispoorly drained at the equipment or in the passageway to the equipment a suitable platformof walkway should be provided adjacent to theequipment and control panels so that it can beserviced safely.

10

INSTALLATION

C 29.9

49.9

B

10.0

E

33.1

38.2

FD

A

26.4

46.2

7.5

4.0

MountingPlate

51.2

61.9

10.0

59.2

4.0

41.9

44.9

51.2

71.0

71.0

61.9

10.0

54.3

57.5

MountingPlate

74.3

10.0

59.2

4.0

C 41.9

44.9

MountingPlate

MountingPlate

10.0

59.2

51.2 A

DF

38.6

7.9

131.8

10.0

59.2

41.9 E

44.9

B

B

28.0

4.0

38.6

7.9 63

.0

50.4

7.9

4.0

63.0

50.4

7.9

FRONT

WFC-SC30/SH30

54.3

57.5

10.0

FRONT

WFC-SC30/SH30

54.3

57.5

FRONT

WFC-SC30/SH30

FRONT

WFC-SC20/SH20

FRONT

WFC-SC20/SH20

A

C

FRONT

WFC-SC20/SH20

FRONT

WFC-SC10/SH10

D

E

F

MountingPlate

Fig. 3 INSTALLATION CLEARANCES (IN.)

11

INSTALLATION AREAMODEL DIM. (IN)

No. WFC A B 1 SC10/SH10 118.2 85.9 1 SC20/SH20 131.2 97.9 1 SC30/SH30 143.0 110.3 2 SC20/SH20 131.2 167.8 2 SC30/SH30 143.0 192.6

SERVICE CLEARANCESIDE DIMENSION (IN)

LEFT (C) 28 REAR (D) 40 RIGHT (E) 28 FRONT (F) 40

ANCHOR BOLT DETAIL

SHIM DETAIL

2.8

3.1

1.2

Cabinet

ShimWFCNut And Washer

Anchor Bolt (1/2")

Mounting Plate

Material: 304SS

Thickness 2mm

1.6

5.9

3.1

Foundation

Installation Area

Foundation

Installation Area

12

FOUNDATION

Mount the absorption chiller on a level floor orfoundation capable of supporting the operatingweight of the unit (refer to PHYSICAL DATA onPage 3).

A concrete base, with dimensions shown inFig. 4, should be at least 12 in. thick and reinforced with crushed rock or steel.

PLACEMENT

When the absorption chiller has been movedinto final position, remove the skid (if not alreadyremoved). Place a spirit level on the level bar,shown in Fig. 5, and insert stainless steel slotted

PIPING

GENERALAfter leveling the absorption chiller, the piping

for chilled/hot water, cooling water and heat medium should be installed. Arrange the pipingwith offsets so that it does not interfere withremoval of panels or service access to the equipment. Adequately support and brace the piping independently of the unit to avoid strain onthe pipe connections. Provide thermowells at eachinlet and outlet connection for measurement offluid temperatures during start-up and routinemaintenance (not required on cooling watercrossover piping).

CHILLED/HOT WATER PIPINGThe chilled/hot water piping contains chilled

water during cooling operation and hot water during heating operation and must be

adjustment plates (shims) between each mounting plate and the foundation, as shown inFig. 6. Adjust the shim thickness for longitudinaland transverse alignment of the absorption chiller.

pressurized, as shown in Fig. 7, by either an opencistern or closed expansion tank. Install pipingwith a rising grade of 1/200 and install manualvent valves at high points to expel trapped air.

A balancing valve should be installed adjacent to the chilled/hot water outlet on eachunit to facilitate flow rate adjustments within specified limits. Install a stop valve adjacent to thechilled/hot water inlet on each chiller. This valvemust be in the full open position when the equipment is operating. DO NOT CLOSE the stopvalve except for disconnection or relocation of themachine.

Insulate piping AFTER LEAK TESTING toprevent heat transfer and sweating. Coverinsulation with a vapor barrier and ensure all stopvalves, balancing valves and thermowells areaccessible.

Fig. 4 FOUNDATION EXAMPLE

Fig. 5 LEVEL BAR Fig. 6 ADJUSTMENT (SHIM) PLATE

Whenever the absorption chiller or thechilled/hot water piping is installed outdoors andsubject to ambient temperatures below freezing,the circuit should be filled with a glycol solution ofadequate concentration to prevent freezing. It isimportant that the glycol solution contain inhibitors to protect the copper tubes in theabsorption chiller from corrosion. If glycol is notused for freeze protection, install a temperaturelimit switch in the lowest outdoor section of the

HEAT MEDIUM PIPINGThe heat medium piping contains water which

must be pressurized, as shown in Fig. 8, by eitheran open cistern or closed expansion tank. Installpiping with a rising grade of 1/200 and install man-ual vent valves at high points to expel trapped air.

A balancing valve should be installed adja-cent to the heat medium outlet on each unit tofacilitate flow rate adjustments within specifiedlimits. Install a stop valve adjacent to the heatmedium inlet on each chiller. This valve must be inthe full open position when the equipment isoperating. DO NOT CLOSE the stop valve exceptfor disconnection or relocation of the machine.

Insulate piping AFTER LEAK TESTING toprevent heat loss and ensure that all stop valves,balancing valves and thermowells are accessible.

Whenever the absorption chiller or the heatmedium piping is installed outdoors and subjectto ambient temperatures below freezing, the

chilled/hot water pipe and interlock the switch withthe absorption chiller controls (refer to OptionalField Wiring Connections).

circuit should be filled with a glycol solution ofadequate concentration to prevent freezing. It isimportant that the glycol solution contain inhibitors to protect the stainless steel tubes in the absorption chiller from corrosion. If glycol isnot used for freeze protection, install a temperature limit switch in the lowest outdoor section of the heat medium pipe and interlock theswitch with the absorption chiller controls (refer toOptional Field Wiring Connections).

Install a motorized 3-way bypass valve (HMV)with limit switches to control the heat input to theabsorption chiller.

Fig. 8 HEAT MEDIUM PIPING

13

CAUTION1. DO NOT EXCEED 80 - 120% OF

STANDARD CHILLED/HOT WATER FLOW.2. DO NOT EXCEED 85.3 PSI IN THE

CHILLED/HOT WATER CIRCUIT AT THEABSORPTION CHILLER.

3. DO NOT INSTALL ANY VALVES IN THEEXPANSION LINE.


STANDARD HEAT MEDIUM FLOW.2. DO NOT EXCEED 85.3 PSI IN THE

HEAT MEDIUM CIRCUIT AT THEABSORPTION CHILLER.

3. DO NOT INSTALL ANY VALVES IN THEEXPANSION LINE.

Heat Medium Outlet

Heat Medium Inlet

T

Drain

IF3 Switch (Optional)

Heat Medium Pump

Air VentChiller/Chiller - Heater

T

Water Make-Up/Expansion Line

Check/Reducing Valve

Expansion Tank

Relief Valve

Water Supply

Heat Medium Bypass Valve (HMV)

P P

Fig. 7 CHILLED/HOT WATER PIPING

T

T

Chilled/Hot Water Pump

IF1 Switch (Optional)

Air Vent

Drain

Water Supply

Check/Reducing Valve

Expansion Tank

Relief ValveWater Make-Up/Expansion Line

Chilled/Hot Water Outlet

Chilled/Hot WaterInlet

Chiller/Chiller - Heater

P P

14

COOLING WATER PIPINGHeat from the absorption chiller is rejected to

a well, river or cooling tower and cooling water ismaintained at 85OF or less during the cooling season. Provide drain valves at all low points inthe piping so that the circuit can be drained during the winter and for maintenance.

All 20 and 30 ton absorption chillers (ModelsWFC-SC20, WFC-SH20, WFC-SC30 and WFC-SH30) require cooling water crossover piping toconnect the condenser and absorber in parallel.Install crossover piping, in accordance with Fig.9, to ensure balanced cooling water flow throughthe condenser and absorber. If the crossoverdesign is changed, install balancing valves at thecondenser outlet and absorber outlet connectionsso that the flow rate through each circuit can beadjusted in accordance with the chiller specifications. As an alternative, install the optional Yazaki cooling water crossover pipeassemblies.

A balancing valve should be installed adjacent to the cooling water outlet on each absorption chiller to facilitate flow rate adjustments within specified limits. Install a stopvalve adjacent to the cooling water inlet as shown in Fig. 9. This valve must be in the full open position when the equipment is operating. DO NOTCLOSE the stop valve except for disconnection orrelocation of the absorption chiller unit.

If the cooling water inlet temperature is below65OF and likely to remain at this condition after the first 30 minutes of cooling operation, a cooling water temperature control system, as shown in Fig. 10 must be installed. The motorized 3-way valve (CWV) will bypass coolingwater to the sump whenever the cooling water inlet temperature is below 65OF.

Wherever possible, install the cooling tower at the same level or above the absorption chiller.If this cannot be accomplished, give careful consideration to the piping design to avoid overflowing the cooling tower sump every time the cooling water pump stops.

If cooling water remains in the condenser andabsorber section of the chiller-heater during heating operation, and the unit is immediatelyswitched to cooling mode, a slug of hot water

NOTES:1. Each standard crossover pipe has similar

pressure losses for balanced cooling water flow through the absorber and condenser.

2. Install flow balancing valves in each circuit for non-standard crossover pipe designs.

3. Install cooling water flow valves 5 pipe diameters (min.) upstream and downstream of the respective “T” fitting.

4. The crossover pipe configuration must provide clear access to the rear of the absorption chiller for maintenance.

Fig. 9 COOLING WATER CROSSOVER PIPING

Fig. 10 COOLING WATER PIPING


STANDARD COOLING WATER FLOW.2. DO NOT EXCEED 85.3 PSI IN THE

COOLING WATER CIRCUIT AT THEABSORPTION CHILLER.

Balancing Valve

Stop Valve

3" Cu Tube

3" Cu Tube

Cooling WaterCondenser Outlet

Cooling Water Absorber Outlet

Cooling Water Condenser Inlet


2" Cu Tube (WFC-SC20/SH20)2 1/2" Cu Tube (WFC-SC30/SH30)

Note 3

Note 3

Union (CxM)

Cooling Water Outlet

Cooling WaterInlet

Chiller/Chiller - Heater

Condenser Water Inlet

Absorber Water Outlet

Cooling Tower

T

Drain

Cooling Water PumpFlushValve

FlushValve

T

Temp. Control (CWTS)

Cooling Water Control Valve (CWV)

Drain

Water Supply

Crossover Piping For WFC-SC20/SH20 & WFC-SC30/SH30 ONLY

P P

15

above 120OF may damage the cooling tower fillmaterial at the start of cooling operation. Thisproblem can be prevented by overriding themotorized 3-way valve (CWV) to bypass coolingwater to the sump for at least 1 minute each timecooling operation is selected or by utilizing a hightemperature fill material in the cooling tower. In an extended heating season the cooling water

ELECTRICAL

GENERALEach absorption chiller and chiller-heater is

factory wired for the voltage specified on the UNIT NAMEPLATE. The standard field wiring con-nections are provided in the junction box located on the left side of each unit.

Optional field wiring connections for accessories and alarms are provided in the

should be drained from the chiller-heater.When the cooling water circuit is not drained

but is subject to ambient temperatures below freezing, install a heater in the cooling tower sump.All exposed piping below the water level should beprotected by electric heat tape and insulation.

junction box and control box (terminal strip on I/Oboard) of the chiller-heater control box. Refer topage 9 for further details.

All absorption chillers must be electricallygrounded and field wiring installed in accordancewith the National Electrical Code (NFPA 70, latest edition).

Option 1: HEAT INPUT CONTROL BY HEAT MEDIUM PUMP AND HEAT MEDIUM BYPASS VALVE

FIELD WIRING DIAGRAM (SINGLE MODULE)

P3A

16

Option 2: HEAT INPUT CONTROL BY HEAT MEDIUM PUMP ONLY

Option 3: HEAT INPUT CONTROL BY HEAT MEDIUM BYPASS VALVE ONLY

OPTIONAL COOLING WATERTEMPERATURE CONTROL

(With Cooling Water Valve Override)

OPTIONAL COOLING WATERTEMPERATURE CONTROL

(Without Cooling Water Valve Override)

INTERLOCK CONTACTS (NC)

P3A

EXTERNAL WIRING (SINGLE MODULE)SYMBOL DESCRIPTION REMARKS

FD2 Cooling water pump fused disconnect

FDF Cooling tower fanfused disconnect Supplied

FD3 Heat medium pump by othersfused disconnect

FDV Heat medium bypassvalve fused disconnect

MC1 Chilled/hot water pumpmotor contactor

MC2 Cooling water pumpmotor contactor Supplied by

MCF Cooling towerothers (24V

fan motor contactor AC coil)

MC3 Heat medium pumpmotor contactor

THR1 Chilled/hot water pumpthermal overload

Supplied byTHR2 Cooling water pump others

thermal overload (1xNC and

THRF Cooling tower fan 1xNOthermal overload

contact)THR3 Heat medium pump

thermal overload P1 Chilled/hot water pumpP2 Cooling water pump CTF Cooling tower fan P3 Heat medium pump

SW1 Chilled/hot water pumpAuto/Manual switch

SW2 Cooling water pumpAuto/Manual switch

SWF Cooling tower fanAuto/Manual switch

SW3 Heat medium pumpAuto/Manual switchInterlock relays for

R, R3 power supply andHMV limit switch

RT1, RT2, Interlock relays forRT3, RTF thermal overloads RCW, R3W Control relays for CWVRC3 Control relay for HMV

T3W Timer (1 min. TDO)for CWV

STANDARD JUNCTION BOX CONNECTIONSTERMINAL DESCRIPTION REMARKS

3 (P1D/P1E) Chilled/hot water pump thermal overload

4 (P2D/P2E) Cooling water pump thermal overload

5 (FD/FE) Cooling tower fan thermal overloadHeat medium pump

6 (P3D/P3E) thermal overload and/or heat medium bypass valve limit switch

P (P1) Chilled/hot water pump CP (P2) Cooling water pump

P3A Heat medium pumpor heat mediumbypass valveP3B

CM1 Common 1S11, S12 Heat medium pump(CHD)

17


FDC Chiller or chiller-heaterfused disconnect

FD1 Chilled/hot water pumpfused disconnect

Supplied byothers

Supplied byothers

CHILLER OR CHILLER-HEATER JUNCTION BOX

Six knockouts in bottom of junction box to suit 1/2in. trade size conduit.

Interlocks(NC or NO)for thermaloverloadtripcontacts

Outputcontrol

Outputcontrol (NO)Outputcontrol (NC)

Outputcontrol

OPTIONAL JUNCTION BOX CONNECTIONSTERMINAL DESCRIPTION REMARKSS3, S4 Microturbine or(EGBON) engine override controlS5, S6 (HM) Heating mode S7, S8 (CM) Cooling mode S13, S14 General shutdown(CHE) alarm

* Optional output when not used for CWV control.


CWV Cooling water temp.control valve (3-way)Cooling water temp.

CWTS switch (70oF ON, 75oF OFF)

CTS Cooling tower switch (81.5oF ON, 77oF OFF)

HMV Heat medium bypass valve (3-way)

3VOPLimit switch for HMVopen position

NOTES:1. The Heat Medium Pump (P3) and/or Heat

Medium Bypass Valve (HMV) are controlledby the chiller/chiller-heater in response to thechilled/hot water outlet temperature.The valvecycle time must be less than 30 seconds.

2. An optional Cooling Water TemperatureSwitch (CWTS) controls the cooling waterinlet temperature by modulating the CoolingWater Valve (CWV). It is required when thecooling water inlet temperature is likely to fallbelow 65oF during cooling operation in lowambient weather.

3. A Cooling Tower Switch (CTS), installed in the cooling tower sump, controls the coolingwater temperature by cycling the coolingtower fan.

4. A Limit Switch (3VOP), installed on the heatmedium bypass valve, closes when the valveis open.

5. Optional controls override the Cooling WaterValve (CWV) to bypass “hot” cooling water tothe cooling tower sump for one minute eachtime cooling operation is selected. This prevents damage to the cooling tower fillmaterial from “hot” cooling water when itremains in the chiller-heater during heatingoperation.

6. Set switch 3 on DIP switch DP1 (located onI/O Board) to ON for normally open (NO) inter-lock contacts and to OFF for normally closed(NC) interlock contacts.

7. Field wiring shown as a broken line.8. All circuits except power supply are low

voltage.9. Confirm that the voltage rating on the chiller

or chiller-heater nameplate is compatible withthe local power supply.

10. All wiring must comply with local and nationalelectrical codes.

OPTIONAL JUNCTION BOX CONNECTIONSTERMINAL DESCRIPTION REMARKS1, 2 (DCP) Remote monitoring A (C1) Cooling mode selection B (H1) Heating mode selection C (CHON) Start selection D (CHOFF) Stop selection E (CM3) Common 3

Cooling tower fanCTF control (84.2OF ON,

80.6OF OFF)

Remoteselection ofCOOL,HEAT, ON,OFFAlternativeto CTStemp. control

OutputControlOutput status*Output statusOutputstatus

Supplied byothers

OPTIONAL FIELD WIRING CONNECTIONS

18

Supplied byothers (Max. 30sec. valve cycletime)

OPTIONAL I/O BOARD CONNECTIONSTERMINAL DESCRIPTION REMARKSTB No.

7, 8 Shutdown interlockAdditional

1 (ST2) interlock (NC or NO)

9,10 Chilled/hot water Input control(IF1) freeze protectionfrom temp.

MG 3, 7 Heat medium switch

C2 (IF3) freeze protection (36.5°F ON,39.2°F OFF)

7, 8 Chiller-heater(CHSTN) standby mode 13, 14 Operating status

Output3 (OP) status

17, 18 General fault alarm(AL)

OPTIONAL CONTROL BOX CONNECTIONSTERMINAL DESCRIPTION REMARKS S1, S2 Heat medium(RFH) supply shutdown OutputS9, S10 Auxiliary boiler

control(BO)

17, 18 Input control

(EGON) Heat available from temp.switch

2, 3 on CN Cooling Water flow Input control

11 (FS2) switch from flowswitch

NOTES:1. Set switch 1 on DIP switch DP1 (located on

I/O Board) to ON for normally open (NO)interlock contacts and to OFF for normallyclosed (NC) interlock contacts.

2. Field wiring shown as a broken line.3. All circuits are low voltage.4. All wiring must comply with local and

national electrical codes.5. Remove jumpers from terminals when field

wiring installed.

19

7 8

20

FIELD WIRING DIAGRAM (MULTIPLE MODULES)

EXTERNAL WIRING (MULTIPLE MODULES)SYMBOL DESCRIPTION REMARKS

MCF Cooling tower fan Supplied bymotor contactor others (24V

MC3 Heat medium pump AC coil)motor contactor

THR1 Chilled/hot water pump thermal overload

SuppliedTHR2 Cooling water pump by othersthermal overload

(1xNC andTHRF Cooling tower 1xNO

fan thermal overload contact)THR3 Heat medium pump

thermal overload P1 Chilled/hot water pumpP2 Cooling water pumpCTF Cooling tower fan P3 Heat medium pump Supplied

SW1 Chilled/hot water pump by othersAuto/Manual switch

SW2 Cooling water pump Auto/Manual switch

21


FDC1 #1 Chiller or chiller-heater fused disconnect

FDC2 #2 Chiller or chiller-heater fused disconnect

FD1 Chilled/hot water pumpfused disconnect

FD2 Cooling water pump fused disconnect Supplied

FDF Cooling tower fan by othersfused disconnect

FD3 Heat medium pump fused disconnect

FDV1 #1 Heat medium bypassvalve fused disconnect

FDV2 #2 Heat medium bypass valve fused disconnect

MC1 Chilled/hot water pump motor contactor Supplied by

MC2 Cooling water pump others (24V

motor contactor AC coil)

POWER BOX(SUPPLIED BY OTHERS)

P3

22


SWF Cooling tower fan Auto/Manual switch

SW3 Heat medium pump Auto/Manual switch

R, R31, Interlock relays for power

R32 supply and HMV1 andHMV2 limit switches

RT1, RT2, Interlock relaysRT3, RTF for thermal overloads RCW, R3W Control relays for CWV

RC31, RC32 Control relays for HMV1 and HMV2

RC, RH, Relays for master COOL,R0, R1 HEAT, ON, OFF control

T3W Timer (1 min. TDO)for CWV

CWV Cooling water temp.control valve (3-way)

Cooling water temp.CWTS switch (70oF ON,

75oF OFF)

CTS Cooling tower switch(81.5oF ON, 77oF OFF)

HMV1 #1 Heat medium bypassvalve (3-way)

HMV2 #2 Heat medium bypassvalve (3-way)

3VOP1 Limit switch for HMV1open position

3VOP2 Limit switch for HMV2open position

NOTES:1. The Heat Medium Pump (P3) and/or Heat

Medium Bypass Valves (HMV1 and HMV2)are controlled by each chiller/chiller-heater inresponse to chilled/hot water outlet temperature. The valve cycle time must beless than 30 seconds.

2. Optional Cooling Water Temperature Switch(CWTS) controls the cooling water inlettemperature by modulating the CoolingWater Valve (CWV). Required when the

cooling water inlet temperature is likely to fallbelow 65oF during cooling operation in lowambient weather.

3. A Cooling Tower Switch (CTS), installed inthe cooling tower sump, controls the coolingwater temperature by cycling the coolingtower fan.

4. Limit Switches (3VOP1 and 3VOP2),installed on each heat medium bypass valve,close when the valve is open.

5. Optional control overrides the Cooling WaterValve (CWV) to bypass “hot” cooling water tothe cooling tower sump for one minute eachtime cooling operation is selected. Preventsdamage to the cooling tower fill material from“hot” cooling water when cooling waterremains in the chiller-heater during heatingoperation. Refer to page 16 for further details.

6. Common remote control of COOL, HEAT, ONand OFF. Required on systems with commonchilled/hot water pumps and common coolingwater pumps to prevent simultaneous coolingand heating. COOL and HEAT selection notrequired for chillers.

7. Field wiring for remote selection of COOL andHEAT not required for chillers.

8. Set switch 3 on DIP switch DP1 (located onI/O Board) to ON for normally open (NO) inter-lock contacts.

9. Optional field wiring connections provided inthe chiller/chiller-heater junction box, I/Oboard and control box for accessories andalarms. Refer to pages 18 & 19 for furtherdetails.

10. Field wiring shown as a broken line.11. All circuits except power supply are low

voltage.12. Confirm that the voltage rating on the chiller

or chiller-heater nameplate is compatible withthe local power supply.

13. All wiring must comply with local and nationalelectrical codes.

Suppliedby others

Supplied byothers (max.30 sec.valve cycletime)

NOTES:1. Full Load Amps (FLA) marked on motor nameplate.2. Use minimum 14 AWG copper conductors for absorption chiller power supply.

Table 1 ELECTRICAL DATA

MODEL

WFC-SC10WFC-SH10WFC-SC20WFC-SH20WFC-SC30WFC-SH30

POWERSUPPLY

(V)

208

208

208

SOLUTION PUMP(3 PH)

OUTPUT FLA(HP) (A)

1/8 0.46

1/6 0.75

1/3 2.04

POWER SUPPLY

MIN. CIRCUIT AMPS MAX. FUSE SIZE(A) (A)

0.6 15

0.9 15

2.6 15

23

POWER WIRINGSelect the disconnect, fuses and supply

conductors for each absorption chiller based onthe minimum circuit ampacity and maximum fusesize on the UNIT NAMEPLATE as per theElectrical Data in Table 1. Install conduit to thefield wiring junction box and leave sufficient clear-ance for removal of panels and service access.DO NOT attach conduit to the absorption chillercabinet. The 1/2 in. trade size conduit entry in the junction box will accommodate four (3 live and 1

grounded) 14 AWG copper conductors in mostwire styles. DO NOT USE ALUMINUM CONDUCTORS.

Locate the disconnect within sight of andreadily accessible to the equipment, per Section440-14 of the National Electrical Code.

DO NOT CLOSE THE DISCONNECT untilapproved by an Authorized Yazaki ServiceProvider.

CONTROL WIRINGAll field control wiring connections to the

absorption chiller are low voltage (less than 30 VAC) class 2 circuits and may be installed with orwithout conduit. A 1/2 in. trade size conduit shouldbe installed to protect the wire against physicaldamage or for aesthetic reasons. If conduit is not used, a bushing must be insertedinto the wire entries of the junction box. Routeadditional wiring to the control box for optionalinput and output controls through the absorptionchiller junction box.

Motor contactors and overload relays for thechilled/hot water pump, cooling water pump, heatmedium pump and cooling tower fan are notinstalled in the absorption chiller and must be supplied by others. Refer to the relevant FieldWiring Diagram (Single Module or MultipleModules) for the recommended wiring of thesecontrols.

Use 18 AWG type T wire or equivalent for alllow voltage field circuits up to 50 ft. (for longer distances use a 16 AWG conductor).

WATER QUALITY

NOTES:ND = Not Detectable*(Maximum total hardness of make-up water shall not exceed 70 ppm when bleed off is the only methodused to control water quality)

Table 2 WATER QUALITY REQUIREMENTS

INSTALLATION CHECK & REQUEST FOR START-UP

24

ITEM

pH (at 77oF)

Conductivity (µS/cm at 77oF)

Chloride ion (Cl-ppm)

Sulfate ion (SO42- ppm)

M-alkalinity (CaCO3 ppm)

Total hardness (CaCO3 ppm)

Calcium hardness (CaCO3 ppm)

Ionic Silica (SiO2 ppm)

Total iron (Fe ppm)

Copper (Cu ppm)

Sulfide ion (S2- ppm)

Ammonium ion (NH4+ ppm)

Residual chlorine (Cl ppm)

Free carbon dioxide (CO2 ppm)

Ryzner stability index

Sta

nd

ard

Ref

eren

ce

CHILLED/HOT

WATER

6.8 - 8.0

400

50

50

50

70

50

30

1.0

1.0

ND

1.0

0.3

4.0

—

HEATMEDIUM

7.0 - 8.0

300

30

30

50

70

50

30

1.0

1.0

ND

0.1

0.1

0.4

—

COOLINGWATER

6.5 - 8.2

800

200

200

100

200*

150

50

1.0

0.3

ND

1.0

0.3

4.0

6.0 - 7.0

MAKE-UPWATER

6.8 - 8.0

300

50

50

50

70

50

30

0.3

0.1

ND

0.1

0.3

4.0

—

Water used in the chilled/hot water, coolingwater and heat medium circuits may cause scal-ing or corrosion if not correctly analyzed andmaintained within the limits specified in Table 2.

In some areas the water supply will containminerals that cause scaling or may be extremelysoft and corrosive. When these conditions exist awater treatment company should be consulted.

If the absorption chiller is damaged as a resultof scaling, corrosion or erosion caused by poorwater quality control the equipment warranty isvoided.

The water quality in the chilled/hot water,cooling water, and heat medium circuits shall notexceed the following limits:

After the absorption chiller or chiller-heaterhas been installed, piped and wired as describedin these instructions, but before any attempt ismade to start the unit, the Authorized YazakiService Provider should be advised so that thestart-up can be scheduled. Complete theINSTALLATION CHECK AND REQUEST FOR

START-UP FORM and send to the Yazaki SalesRepresentative or Distributor at least 2 weeksprior to the required start-up date.

The contractor is expected to provide person-nel to assist with final adjustment of system con-trols and flow rates.

A. CHILLER OR CHILLER-HEATER1. Unit placed on foundation ...............................❑2. Service clearance provided on all sides and

top (40 in. front) ...............................................❑3. Shims placed under mounting plates and

level adjusted for longitudinal and transverse alignment .........................................................❑

4. Chiller anchored to foundation (if required by code) .........................................❑

5. Chilled/hot water flow switch pipingconnected ........................................................❑

B. WATER PIPING1. Chilled/hot water piping installed between chiller,

pumps and air handling units ..........................❑2. Cooling water piping installed between

chiller, pumps and cooling tower .....................❑3. Heat medium piping installed between

chiller, pumps and heat source .......................❑4. Flow setters installed in water piping

(only required for glycol circuits) .....................❑5. Water make-up and fill lines installed to

cooling tower ...................................................❑6. Expansion tank and water make-up piping

installed to chilled/hot water system.................❑7. Expansion tank and water make-up piping

installed in heat medium system .....................❑8. Temperature test plugs (P/T Plug) or

thermowells installed in the inlet and outlet piping of each chiller .......................................❑

9. Valves installed at each chiller for flow balancingand isolation ....................................................❑

10. Air vent valves installed on piping ...................❑11. Water piping leak tested and flushed, and

strainers cleaned .............................................❑12.System filled with water and glycol (if required)

and trapped air vented ....................................❑

C. POWER WIRING1. Power supply, indicated on the

UNIT NAMEPLATE, is connected ...................❑

2. Wiring installed between the motor contactors and chilled/hot water pump, cooling water pump, heat medium pump and cooling tower fan .......❑

3. Rotation of each motor checked .....................❑4. Power supply wiring installed between a fused

disconnect and each chiller. (DO NOT operate the chiller) ........................................................❑

5. Power supply available near the chiller for a vacuum pump ..................................................❑

D. CONTROL WIRING1. Motor contactors and manual controls installed

for all external motors ......................................❑2. Control wiring (24V AC) installed between chiller

and motor contactors ......................................❑3. Control wiring installed between chiller and heat

medium bypass valve ......................................❑4. Interlock wiring installed between chiller and limit

switch on heat medium bypass valve ..............❑5. Interlock wiring installed between chiller and

thermal overloads on the following motors:Chilled/hot water pump, cooling water pump,heat medium pump and cooling tower fan .....❑

6. Control wiring (24V AC) installed between chiller control box and cooling water temperature control valve (if installed) .................................❑

7. Low voltage (24V AC) wiring connected to chiller for remote control, operating status and general alarm annunciation ..........................................❑

E. Arotrend REMOTE MONITORING (IF INSTALLED)1. Wiring installed between Monitoring Unit and

each chiller ......................................................❑2. Dedicated telephone line installed adjacent to

the Monitoring Unit ..........................................❑

F. CONDITIONSPersonnel available to assist with start-up who are familiar with the system ..........................❑

YAZAKI WATER FIRED CHILLERINSTALLATION CHECK AND REQUEST FOR START-UP

To: ____________________________________________________________________ (Yazaki Service Provider)

Address: ____________________________________________________________________________________

Project Name: ________________________________________________________________________________

Address: ____________________________________________________________________________________

Model No:______________________________ Serial No: __________________________________________

The Work (as checked below) is in progress and will be completed by: __________________________________

28

AUTHORIZED YAZAKI SERVICE PROVIDER

For information concerning service, operationor technical assistance, please contact your

Authorized Yazaki Service Provider or the following:YAZAKI ENERGY SYSTEMS, INC.

701 E. PLANO PARKWAY, SUITE 305, PLANO TEXAS75074-6700

Phone: 469-229-5443Fax: 469-229-5448

Email: [email protected]: www.yazakienergy.com

This symbol on the product’s nameplatemeans it is listed by

UNDERWRITERS LABORATORIES, INC.

Yazaki reserves the right to discontinue, or change at any time,specifications or designs without notice and without incurring obligations.

IN-WFCS-0507

WATER FIRED SINGLE-EFFECT ABSORPTION CHILLER AND CHILLER ... · WATER FIRED SINGLE-EFFECT...

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