Yazaki Aroace WFC-SC10 Installation Instructions Manual
Water-fired single-effect absorption chiller
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- Installation manual (21 pages)
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INSTALLATION INSTRUCTIONS
WATER-FIRED SINGLE-EFFECT
This product is a water-fired single-effect absorption unit which provides chilled
water for cooling in central plant type air conditioning systems. WFC-SH model chiller-
heaters also provide hot water for heating in two-pipe central plant type systems. Units
with nominal refrigeration capacities of 10, 20, 30, and 50 tons are complete with
operating and safety controls. The absorption chiller or chiller-heater is energized by a
heat medium
(hot water)
capable of providing a temperature range of 158 - 203°F
GENERAL
CONTROL ADJUSTMENTS
ABSORPTION CHILLER
from a process, cogeneration, solar, or waste heat source
CONTENTS
Page
2
2
2
3
4
5
7
8
11
13
13
14
14
WFC-SC10, 20, 30, 50
WFC-SH10, 20, 30
(70 - 95°C).
SYSTEM INTERFACE
Page
15
15
16
16
17
18
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19
20
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Summary of Contents for Yazaki Aroace WFC-SC10
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Page 1: Table Of Contents
WFC-SC10, 20, 30, 50 WFC-SH10, 20, 30 INSTALLATION INSTRUCTIONS WATER-FIRED SINGLE-EFFECT ABSORPTION CHILLER This product is a water-fired single-effect absorption unit which provides chilled water for cooling in central plant type air conditioning systems. WFC-SH model chiller- heaters also provide hot water for heating in two-pipe central plant type systems. Units with nominal refrigeration capacities of 10, 20, 30, and 50 tons are complete with operating and safety controls. -
Page 2: General
1. DO NOT OPEN ANY SERVICE VALVES personnel and maintain warranty validation. WITHOUT PROPER EVACUATION ASSEMBLY ATTACHED TO THEM AS SUCH Each Yazaki absorption chiller or chiller- ACTION WILL RESULT LOSS heater has been evacuated, charged with VACUUM AND INTRODUCTION OF GASES... -
Page 3: Standard Specifications
STANDARD SPECIFICATIONS Specifications WFC- SC10 SH10 SC20 SH20 SC30 SH30 SC50 Cooling Capacity MBTUh 120.0 240.0 360.0 600.0 (kW) (35.2) (70.3) (105.5) (175.8) MBTUh 166.3 332.6 498.9 Heating Capacity (kW) (48.7) (97.5) (146.2) Cooling °F 54.5 Inlet / 44.6 Outlet (°C) (12.5) (7.0) -
Page 4: Equipment Dimensions
EQUIPMENT DIMENSIONS (Drawings are not to scale) WFC-(SC,SH)10 WFC-(SC,SH)20... - Page 5 WFC-(SC,SH)30 WFC-SC50...
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Page 6: Typical System Design
TYPICAL SYSTEM DESIGN EXAMPLE OF A SINGLE MODULE EXAMPLE OF MULTIPLE MODULES... -
Page 7: Wiring Diagrams
WIRING DIAGRAMS Figure 1 – Internal Wiring Diagram... - Page 8 TERMINALS INTERNAL WIRING SYMBOL LOCATION REMARKS SYMBOL DESCRIPTION REMARKS Cooling water inlet Control Box temperature sensor Only on SH Field wiring Changeover valve models Junction Box connections F2, F4, Refer to Fuse Control Box F11, F12, Fuses Rating Table (I/O Board) FT1, FT2 Chilled/hot water Molex Connector...
- Page 9 OPTIONAL CONTROL BOX CONNECTIONS TERMINAL DESCRIPTION REMARKS TERMINAL DESCRIPTION REMARKS If the terminals 2, 3 on Cooling water flow Field-installed are jumped, the Chilled/hot water CN11 TB1-9, switch option WFC-S unit will circuit freeze (FS2) TB1-10 use its internal protection logic Dry contact, 24v, (IF1) freeze protection...
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Page 10: Installation
Yazaki distributor has been notified and permanent and semi-permanent barriers. any required remedial actions have been The Yazaki chiller-heater is designed for completed. - Page 11 3. Do not simply tip the unit over onto its back. It When rigging for overhead lift, attach should be lifted and turned to the horizontal shackle bolts to the lifting lugs. Bring the configuration while fully supported four individual rigging cables together at a suspended, though it only need be barely off point high enough that the angle between the the ground while turning.
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Page 12: Location And Clearances
LOCATION AND CLEARANCES Particular care must be taken when placing the machine so as to provide adequate clearance for access to each side of the machine. Maintenance is mostly done through the front of the unit, but in a repair scenario, any panel on any side may need to be removed to access components behind them. -
Page 13: Leveling
When setting the flow through each fluid Piping rules and conventions used with loop, consult the Pressure Loss in Unit tag, Yazaki chillers and chiller-heaters are exactly located on the frame just below and to the the same as those used with any other type left of the control panel. -
Page 14: Chilled/Hot Water Piping
This needle valve has a special metric flare CAUTION connection so it requires a specialized tool, – available from Yazaki, in order to access the 1. DO EXCEED 120% fluid circuit for pressure readings. STANDARD CHILLED WATER FLOW. -
Page 15: Cooling Water Piping
supplied. It is recommended that balance valves be installed on the outlets of both the Condenser and Absorber in order to be able COOLING WATER PIPING to properly balance the flow through each tubing bundle in accordance to the Pressure Drop in Unit tag. -
Page 16: Freeze Protection
Bypass Valve. When the unit requires heat most common method is the use of glycol. medium, it will send a signal to this valve to Glycol may be permitted for use in Yazaki open. When the unit does not require heat chiller-heaters with certain precautions: medium, for whatever reason, this valve will 1. -
Page 17: Electrical
ELECTRICAL Figure 15 – Junction Box Each absorption chiller/chiller-heater is in areas where power supply voltage is factory-wired for the specific voltage listed on known to be unstable. the Unit Nameplate. The standard field Phase rotation should be checked at wiring connections are provided in the these terminations as well. -
Page 18: Controlling Pumps And Valves
CONTROLLING PUMPS AND VALVES The unit logic should control the pumps and/or heat medium bypass valve rather than any remote system such as BMS. Field-supplied voltage is provided to terminal CM1 in the junction box. This voltage is then controlled through dry-contact relays by the unit logic. -
Page 19: Pump Safety Interlocks
The FS1 flow cooling water inlet temperature has fallen switch for the chilled/hot water circuit is a below 80.6°F , the unit logic will open standard equipment item with all Yazaki (27°C) the CTF dry contacts. chillers/chiller-heaters. installation instructions for the FS2 flow switch are included in the accessory package. -
Page 20: Remote Monitoring
The optional LON Adapter accessory will Inc., for more information on the software allow the direct interface of the supported and monitoring services offered as these output data from the Yazaki controls to any options can change or be discontinued LON-compatible control system. It mainly without notification at any time. -
Page 21: Water Quality
WATER QUALITY Water used in the chilled water, cooling conditions exist, a water treatment company water, and heat medium circuits may cause should be consulted. If the absorption chiller scaling and/or corrosion if not correctly is damaged as a result of scaling, corrosion, maintained within specific limits. -
Page 22: Installation Check & Request For Startup
Service Provider should be advised so that the (ASP) startup can be scheduled. Complete REQUEST STARTUP form and send it to the ASP or to Yazaki Energy Systems, Inc., at least three (3) weeks prior to the required startup date. - Page 23 YAZAKI WFC-SC/SH SERIES CHILLER INSTALLATION CHECK AND REQUEST FOR START-UP Yazaki Authorized Service Provider: Address: Project Name: Project Address: Model No: Serial No: Anticipated Startup Date: A. CHILLER-HEATER C. POWER WIRING □ 1. Power supply, as indicated on the UNIT 1.
- Page 24 Email: yazaki@yazakienergy.com Web: www.yazakienergy.com LISTED This symbol on the product’s nameplate means it is listed by UNDERWRITERS LABORATORIES, INC. Yazaki reserves the right to change or discontinue specifications or designs at any time, without notice and without incurring obligation. WFCSUL-II-2D2-0513...
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