H25.REV

EVAPORATIVE CONDENSER SYSTEM

NOTE: FINAL COPY: JANUARY, 1987.

Part 1 -	GENERAL

1)	WORK INCLUDED

A.	Work in this Section includes the providing of labor, materials, equipment and services necessary for a complete and safe installation in accordance with the contract documents and all applicable codes and authorities having jurisdiction for the following

1.	Evaporative condenser.

2.	Piping.

3.	Testing and charging.

2)	RELATED WORK AND REQUIREMENTS

A.	Requirements of GENERAL CONDITIONS, DIVISION NO. 1 and Section GENERAL PROVISIONS FOR HEATING, VENTILATING, AND AIR CONDITIONING WORK apply to all work in this Section

NOTE: EDIT TO SUIT PROJECT REQUIREMENTS. INCLUDE ONLY SECTIONS DIRECTLY AFFECTING WORK OF THIS SECTION

B.	Related work in the following Sections:

1.	PIPING.

2.	INSULATION.

3.	VIBRATION ISOLATION.

4.	PACKAGED RECIPROCATING WATER CHILLERS (WATER COOLED).

5.	MOTORS.

6.	AUTOMATIC CONTROL SYSTEMS.

7.	-----.

3)	REFERENCE STANDARDS

A.	Published Specifications' standards, tests or recommended methods of trade, industry or governmental organizations apply to work in this Section

B.	Comply with all applicable national, state and local codes and refer to Section GENERAL PROVISIONS FOR HEATING, VENTILATING, AND AIR CONDITIONING WORK for additional Reference Standards

4)	QUALITY ASSURANCE

A.	Refer to Section GENERAL PROVISIONS FOR HEATING, VENTILATING, AND AIR CONDITIONING WORK for Guarantee and other Quality Assurance requirements

5)	SUBMITTALS

A.	Submit shop drawings including catalog cuts, layout drawings and wiring diagrams for evaporative condenser system

Part 2 -	PRODUCTS

1)	BASE BID MANUFACTURERS.

A.	Evaporative condensers: Baltimore Air Coil Co.Inc., Frick Co. and Dunham-Bush, Inc

2)	PIPING AND FITTINGS

A.	For piping, refer to Section "PIPING" for refrigerant, refrigerant relief, overflow and drain piping, fill and make-up water piping and bleed

B.	Fittings: For refrigerant relief, provide soldered wrought copper. For overflow drain and bleed, provide galvanized cast iron

3)	EVAPORATIVE CONDENSERS

A.	Condenser with:

NOTE: USE OPTION 2 ONLY IN SPECULATIVE - TYPE OFFICE BUILDINGS OR AS A COST CUTTING ALTERNATIVE

URFACE

1.	Prime copper surface.

2.	Hot-dipped galvanized steel surface.

NOTE: COORDINATE LIQUID SUBCOOLER REQUIREMENT.

URFACE

3.	Liquid sub-cooler, if required, make-up water float valve, steel basin, steel casing, motors, blower with fixed pitch belt drive and belt guard

LIM

4.	Steel eliminators.

5.	Polyvinyl chloride eliminators.

LIM

6.	Angle iron frame, factory installed recirculating pump piped to ABS molded non-clog spray nozzles or gravity type distribution system, access panels of adequate size for maintenance, overflow and drain connections, water bleed system, fan motor weather protection cover and flanged collar for duct connections

NOTE: INSERT REFRIGERANT TYPE.

7.	Condensers shall be suitable for operation with Refrigerant -----

B.	Piping shall be galvanized steel. Eliminators shall be minimum double break and removable type.

NOTE: TOTALLY ENCLOSED FAN COOLED TYPE SHALL BE USED ON ALL INSTALLATIONS WHERE MOTOR IS EXPOSED TO WEATHER

OTO

C.	Motors shall be totally enclosed fan cooled.

D.	Motors shall be dripproof.

OTO

E.	Corrosion protection: All steel surfaces, including fan shaft shall be galvanized, with zinc primer and final coat of zinc chromatized aluminum on all exposed surfaces

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT.

F.	Automatic controls: condenser pressure control shall consist of thermostat or pressure switch with control relay which shall modulate fan discharge dampers to maintain adjustable preset refrigerant condensing temperature. Damper operator shall be instantly operable in low ambient temperature

NOTE: INCLUDE FOR WINTERIZED EVAPORATIVE CONDENSERS. PROVIDE BASIN FREEZE PROTECTION UNLESS RECEIVING TANK IS PROVIDED IN HEATED SPACE

1.	Thermostat with adjustable preset temperature in outside air intake which shall control recirculating pump

a.	When temperature falls below 35 deg F, pump stops

b.	When temperature rises above 35 deg F, pump starts

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT.

G.	Terminals for interlocking to prevent compressor operation unless fan is operating

H.	Evaporative condensers shall be similar to Baltimore Aircoil Model VXC

Part 3 -	EXECUTION

1)	INSTALLATION

NOTE: ON DRAWINGS SHOW ELEVATION, INCLUDING SUPPORTS, VIBRATION ELIMINATORS AND OTHER INFORMATION REQUIRED FOR COMPLETE AND PROPER INSTALLATION

A.	Piping: Pipe overflow and drain to drain or service sink and size the same as connections on evaporative condenser

1.	Provide bleed piping with needle valve for adjustment.

2.	Refrigerant piping shall be sized and installed in accordance with ASHRAE recommendations and arranged to insure proper oil flow in system

NOTE: FOR INDOOR INSTALLATION.

3.	Pipe refrigerant relief to atmosphere.

B.	Testing and charging:

1.	Test before charging:

a.	Pressurize system to 300 psig with nitrogen and refrigerant mixture

b.	Test points of possible leakage with halide testing device

c.	Evacuate system to 100 microns using high vacuum pump

d.	Maintain vacuum for 24 hours without losing more than 50 microns with vacuum pump stopped

e.	Vacuum measurements shall be made with micron gauge

2.	After system is proven pressuretight, charge with refrigerant

3.	Complete charge of lubricating oil.

4.	Certify that units have passed above test before turning over system to Owner

C.	System operating pressure shall be in accordance with ASME Code for operating refrigerant pressures