H20.REV

SELF-CONTAINED AIR CONDITIONERS

NOTE: FINAL DATE: APRIL, 1988.

NOTE: REVIEW LOCAL CODE REQUIREMENTS; INCLUDE REFRIGERANT RELIEF PIPING IF REQUIRED BY CODE

NOTE: COORDINATE THIS SECTION WITH APPROPRIATE REMOTE CONDENSER SECTION

NOTE: REVIEW FLOOR LOADINGS. IF PERMISSIBLE FLOOR LOAD IS EXCEEDED BY BASE DIMENSIONS OF UNITS, REVIEW NECESSARY PROVISION TO SPREAD OR CARRY LOADS AND INCLUDE APPLICABLE SPECIFICATION ITEMS

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.	Self-contained air conditioners for operation with:

WATER

a.	Remote evaporative condenser.

b.	Remote air cooled condenser.

c.	Remote cooling tower.

NOTE: CHECK LOCAL CODES REGARDING USE OF CITY WATER.

d.	City water.

WATER

2.	Piping

3.	Emergency switches.

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 followig Sections:

1.	PIPING.

2.	CONDENSER WATER SYSTEM (Packaged Cooling Towers).

3.	AIR COOLED CONDENSER SYSTEM.

4.	EVAPORATIVE CONDENSER SYSTEM.

5.	INSULATION.

6.	MOTORS.

7.	VIBRATION ISOLATION.

8.	-----.

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, catalog cuts and wiring diagrams for self-contained air conditioners

Part 2 -	PRODUCTS

1)	BASE BID MANUFACTURERS: Carrier Air Conditioning Co., Trane Co. and York Corp

2)	PIPING AND FITTINGS

A.	Refer to Section "PIPING" for condensate drain, refrigerant and cold water piping

B.	Fittings: Threaded galvanized cast iron, drainage type fitting for condensate drain. Soldered wrought copper type for refrigerant piping

3)	SELF-CONTAINED AIR CONDITIONERS

A.	Air conditioner shall be factory assembled, tested, dehydrated, lubricated oil charge and refrigerant charge in accordance with ASME Code and UL approved with independent refrigerant circuit for each compressor and minimum capacities as noted

B.	Compressors: Hermetic type, direct driven 1750 rpm with unloaded starting, vibration isolators, crankcase heater, hot gas muffler reversible rotating oil pump, and capacity control

STEP

1.	Compressors in sequence.

2.	Step unloading.

STEP

C.	Fan assembly: Centrifugal fan with motor and variable pitch pulley up to 25 hp or fixed pitch pulley above 25 hp

1.	Supply replacement fixed pitch pulleys as required to balance system

2.	Supply one set of replacement pulleys and belts.

3.	Matched belts shall be rated at 150 percent rated hp.

4.	Belt guard if belts are exposed and bearing lubrication system

D.	Cooling coils: Copper tubing with aluminum fins and galvanized tube sheets with number of circuits to match compressors.

E.	Insulated Drain Pan.

F.	Heating Coils: Copper tubing with aluminum fins.

TYPE

1.	Steam distributing tube type.

2.	Hot water type.

TYPE

G.	Filters: Refer to Section "AIR HANDLING SYSTEM EQUIPMENT". Filter box shall be suitable for

ARRANG

1.	V-bank arrangement.

2.	Flat arrangement.

ARRANG

H.	Insulate casings and pipe.

I.	Condenser:

NOTE: IF WATER WORKING PRESSURE EXCEEDS 125 PSIG, CHECK AVAILABILITY OF SUITABLE CONDENSER WITH MANUFACTURER

1.	Multi-pass shell-and-coil or multi-pass shell-and-tube with copper coils or tubes, pressure relief valve, liquid line shutoff valve and refrigerant charging valved connection

2.	Water side working pressure shall be minimum 125 psig

PIPED

3.	Piped for cooling tower water.

NOTE: FOR CITY WATER COOLED UNITS.

4.	Piped for city water.

PIPED

J.	Water regulating valves.

K.	Refrigeration accessories: For each circuit shall follows:

1.	Combination filter and drier in liquid line with two replaceable cartridges, similar to Sporlan Catchall Replaceable Core Type

2.	Combination sight-glass and moisture indicator in liquid line, similar to Sporlan See-All

3.	Thermostatic expansion valves with external equalizer, superheat adjustment, and capillary and bulb charge, similar to Sporlan Valve Co

L.	Control cabinet, factory mounted and prewired shall be as follows

1.	Combination fused disconnect switch and magnetic starter type controller for each motor

2.	Refrigerant dual pressure switches with manual reset on high pressure cutout

3.	"OFF-FAN-COOL" switch.

4.	Terminal block.

5.	Compressors interlocked with fan to prevent operation unless fan is operating

6.	Time delay relay to prevent compressor short cycling.

M.	Compressor motors shall be high starting torque type and conditioner shall be similar to Carrier Air Conditioning Co. Model -----

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT.

4)	REFRIGERATION EMERGENCY SWITCH

A.	Provide break-glass type, similar to Acme Fire Alarm Co. 390 Series, to stop unit and to start room exhaust fan if it is not operating

Part 3 -	EXECUTION

1)	INSTALLATION

A.	Piping:

1.	Condensate drain: From drain pan to floor drain shall be minimum 1 1/4 inch pipe with trap seal to prevent air leakage. Minimum seal shall be equal to static pressure in drain pan

2.	Refrigerant: Relief piping from unit to atmosphere and refrigerant piping between unit and remote condenser

2)	FIELD QUALITY CONTROL

A.	Refrigerant piping: Test in accordance with requirements of authorities having jurisdiction