H19.REV

SELF-CONTAINED COMPUTER ROOM AIR CONDITIONERS

NOTE: FINAL COPY: JUNE, 1988.

NOTE: USE THIS SECTION FOR COMPUTER ROOM TYPE UNITS. REVIEW LOCALCODE REQUIREMENTS. INCLUDE REFRIGERANT RELIEF PIPING IF REQUIRED BY CODE.REVIEW FOR LOADINGS. IF PERMISSIBLE FLOOR LOAD IS EXCEEDEDBY BASE DIMENSIONS OF UNITS, REVIEW NECESSARY PROVISIONS TOSPREAD OR CARRY LOADS AND INCLUDE APPLICABLE SPECIFICAITONITEMS

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

NOTE: INDICATE ALL WORK TO BE COVERED BY THIS SECTION. EDIT PORTIONS OF WORK INDICATED TO SUIT PROJECT REQUIREMENTS

1.	Self-contained air conditioners for operation with:

OND

a.	Chilled water

b.	Condenser water: from cooling tower.

NOTE: CHECK LOCAL CODE RE: USE OF CITY WATER.

c.	Condenser water: city water.

d.	Remote air-cooled condenser.

e.	Remote Dry-Cooler with Economizer coil.

2.	Piping.

3.	Emergency switch.

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.	CONDENSER WATER SYSTEM.(Packaged Cooling Towers)

3.	INSULATION.

4.	MOTORS.

5.	AUTOMATIC CONTROL SYSTEMS.

6.	-----.

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 PROVSIONS FOR HEATING, VENTILATING AN0 AIR CONDITIONING WORK for Guarantee and other Quality Assurance requirements

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

5)	SUBMITTALS

A.	Submit shop drawings and product data for self-contained computer room air conditioners, including catalog cuts and wiring diagrams

Part 2 -	PRODUCTS

1)	BASE BID MANUFACTURERS

A.	Self-contained room air conditioners: Liebert Corp., Edpac Corp.

2)	GENERAL

NOTE: FOR COOLING TOWER WATER.

A.	For condenser water piping, refer to Section "CONDENSER WATER SYSTEM" and Section "PIPING".

NOTE: FOR CONDENSER COOLING USING CITY WATER, REMOTE EVAPORATIVECONDENSER, OR REMOTE AIR COOLED CONDENSER

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

C.	Provide drainage type, threaded galvanized cast iron fittings for condensate drain and soldered wrought copper type for refrigerant relief

D.	Factory assembled units shall be tested, dehydrated and charged. There shall be an independent refrigerant circuit for each compressor The temperature control and humidity control shall be solid stat plug-in modules with sensitivity adjustment and alarm panel

NOTE: FOR NEW YORK CITY PROJECTS.

1.	Unit shall be in accordance with ASME Code and UL approved; NYC MEA or BS & A approved

NOTE: FOR PROJECTS OUTSIDE OF NEW YORK CITY.

2.	Unit shall be in accordance with ASME Code and UL approved.

NOTE: FOR CHILLED WATER, COMPUTER UNITS USE PARAGRAPH NO. 2.03. (LIBERT DELUXE SYSTEM 3)

NOTE: COORDINATE ACCESS FOR UNIT. ACCESS IS FROM FRONT PANEL AND SIDE PANELS FOR LIBERT. DELUXE SYSTEM/3.

3)	SELF-CONTAINED COMPUTER ROOM UNIT FOR OPERATION WITH CHILLED WATER.

A.	Cabinet exterior panels shall be constructed of minimum 18 gauge steel with 1 in. thick 1 1/2 lb. per cu.ft. fiberglass insulation. Finished color on panels shall be as approved by Architect and/or Engineer.

AB

NOTE: *OPTION 1 CAB* IS AVAILABLE WITH OR WITHOUT FLOOR STAND AND TURNING VANES

B.	Unit shall be suitable for down flow air discharge with floor stand and turning vanes

C.	Unit shall be suitable for upflow air discharge and connection to duct work.

NOTE: OPTION 3 IS AVAILABLE WITH OR WITHOUT DISCHARGE GRILLE.

D.	Unit shall be suitable for upflow plenum discharge. Plenum shall be similar in construction to the cabinet with insulation and discharge grille

AB

NOTE: FILTERS INSIDE THE UNIT.

ETURN

E.	Unit shall be arranged for front return air connection.

NOTE: FILTERS OUTSIDE THE UNIT.

F.	Unit shall be arranged for rear return air connection.

ETURN

G.	Supply fans shall be double width, double inlet centrifugal type. Fan and motor assembly shall be statically and dynamically balanced in unit at factory. Ball bearings shall be permanently lubricated with minimum life of 100,000 hours. Fans motor shall be totally enclosed.

RIVE

1.	Direct drive.

2.	Fan motor mounted on adjustable slide base. The fan drive shall be matched belts sized for 200 percent motor h.p with variable pitch pulley.

RIVE

NOTE: MINIMUM WORKING PRESSURE 125 PSIG. SHOW TYPICAL COIL CONNECTIONS DETAIL FOR CHILLED WATER ON DRAWINGS

H.	A - Frame chilled water cooling coil shall be constructed of copper tube with mechanically bonded aluminum fins. Coil shall be suitable for working pressure of ----- psig

1.	Cooling coil shall be complete with modulating 2 way-control valve, strainer, balancing valve and gate valves.

NOTE: SHOW TYPICAL COIL CONNECTION DETAIL ON DRAWING.

EHEAT

I.	Steam reheat coils shall be constructed of copper tubes aluminum fins and galvinized steel tube support sheets with 2 way modulating control valve, strainer, balancing valve and gate valve

NOTE: MINIMUM WORKING PRESSURE 125 PSIG. SHOW TYPICAL COIL CONNECTION DETAIL ON DRAWINGS

J.	Hot water reheat coil shall be constructed of copper tubes, aluminum fins and galvanized steel tube support sheets and suitable for working pressure of ----psig. Coil shall be complete with 2 way modulating control valve, strainer, balancing valve and gate valves.

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT. INDICATE NUMBER OF STAGES ON SCHEDULES

K.	Reheat coil shall be electric resistance type, low watt density, fin tublar construction, with automatic high temperature overload potection, safety cut out for no air flow and high discharge air temperature cut out. Sheath temperature shall not exceed 420 deg F.

EHEAT

OTE: COORDINATE WITH ELECTRICAL DEPARTMENT

UMID

L.	Humidifier shall be infrared type with high quartz lambs mounted above a stainless steel pan,water make up controls and programmable automatic flush control

M.	Humidifier shall be electronic steam humidifier with replaceable cylinder, solid state control, electric boiler, steam distribution manifold, fill and drain solenoid valves, variable capacity potentiometer and contactors. Unit shall automatically control the capacity of steam produced, adjust the frequency and duration of blow down cycle and emit audio and visual alarms in the event of failure

UMID

N.	Filters shall be 4 inches deep, pleated throwaway Type rated not less than 45% efficient by the N.B.S. Dust Spot Method or 20% efficiency per ASHARE Test Standard 52-76

O.	Control Cabinet

1.	Control cabinet shall be factory mounted and prewired with magnetic starters with overload protection for each motor, automatic time delay restart, terminal block, and main power raceway.

AIL

2.	Automatic time delay restart shall start the unit in the event of power failure

3.	Automatic time delay restart shall sequentially start all the units in the event of power failure

AIL

P.	AUTOMATIC CONTROL

OTE: LIBERTS UNIT LEVEL 0 CONTROL AND MOINTOR SYSTEM.

1.	Automatic control system and mointor panel shall be microprocessor based,factory monted, prewired with sensitivity adjustment buttons, stop start push buttons and LED display as follows

a.	Set-point temperature in deg F.

b.	Current temperature in deg F.

c.	Temperature controller set point: 65 deg F to 85 deg F.

d.	Temperature sensitivity: plus or minus 1 deg F to 5 deg F in 0.1 increments

e.	Current Humidity in percent (%) RH.

f.	Humidity set point 40% to 60% RH.

g.	Humidity sensitivity 1% to 10% RH in 0.1 increments.

h.	Alarm conditions shall activate an audible and visual indicator, as follows

(1)	High temperature.

(2)	Low temperature.

(3)	High humidity.

(4)	Low humidity.

(5)	Change air filters.

(6)	Loss of air flow.

(7)	High head pressure.

(8)	Local alarm

(9)	Common alarm terminal for connection to a remote alarm indicating device.

NOTE: UNDERFLOOR DETECTOR OPTION IS AVAILABLE.

(10)	Underfloor water sensors detector shall activate audible and visual alarm

2.	A battery back-up shall maintain programmed set points in the event of power failure Connection terminal for remote shutdown device

OTE: COORDINATE OPTIONAL EQUIPMENT WITH MANUFACTURER. INDICATE CONDENSATE PUMP SCHEDULE ON DRAWINGS

Q.	Firestat shall be mounted in the control panel and sensor located in the return air. Firestat shall shut down the computer room air conditioner unit when activated

MOKE

R.	Smoke detector mounted in the control panel and sensor located in return air. Detector shall shut down the computer room air conditioner unit when activated

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT

S.	Smoke detector located in room shall shut down the computer room air conditioner unit when activated via the panel.

MOKE

T.	Condensate pump shall be centrifugal type having a minimum capacity as noted with integral float switch, pump and motor assembly and reservoir

U.	Water detector sensors shall be solid state hermetically sealed, located under the raised floor as noted and wired to the terminal strip within unit

NOTE: FOR WATER COOLED COMPUTER UNITS USE PARAGRAPH 2.04. LIBERT DELUXE SYSTEM 3

NOTE: COORDINATE ACCESS FOR UNIT ACCESS IS FROM FRONT PANEL AND SIDE PANELS FOR LIBERT. DELUXE SYSTEM/3.

4)	SELF-CONTAINED COMPUTER ROOM UNIT FOR OPERATION WITH CONDENSER WATER.

A.	Cabinet exterior panels shall be constructed of minimum 18 gauge steel with 1 in. thick 1 1/2 lb. per cu.ft. fiberglass insulation. Finished color on panels shall be as approved by Architect and/or Engineer.

NOTE: OPTION 1 CAB* IS AVAILABLE WITH OR WITHOUT FLOOR STAND AND TURNING VANES

AB

B.	Unit shall be suitable for down flow air discharge with floor stand and turning vanes

C.	Unit shall be suitable for upflow air discharge and connection to duct work.

NOTE: OPTION 3 CAB* IS AVAILABLE WITH OR WITHOUT DISCHARGE GRILLE.

D.	Unit shall be suitable for upflow plenum discharge. Plenum shall be similar in construction to the cabinet with insulation and discharge grille

AB

NOTE: FILTERS INSIDE THE UNIT.

ETURN

E.	Unit shall be arranged for front return air connection.

NOTE: FILTERS OUTSIDE THE UNIT.

F.	Unit shall be arranged for rear return air connection.

ETURN

G.	Supply fans shall be double width, double inlet centrifugal type. Fan and motor assembly shall be statically and dynamically balanced in unit at factory. Ball bearings shall be permanently lubricated with minimum life of 100,000 hours. Fans motor shall be totally enclosed

RIVE

1.	Direct drive.

2.	Fan motors mounted on adjustable slide base. The fan drive shall be matched belts sized for 200 percent motor h.p with variable pitch pulley.

RIVE

H.	Filters shall be 4 inches deep, pleated throwaway type rated not less than 45% efficient by the N.B.S. Dust Spot Method or 20% efficiency per ASHARE Test Standard 52-76

I.	A - Frame refrigerant cooling coil shall be constructed of copper tube with mechanically bonded aluminum fins. Coil shall be complete with distributor and thermostatic expansion valve with external equalizer

J.	Compressors shall be cast-iron semi-hermetic type, direct driven at 1750 rpm with oil sight glass, built in thermal overload, manual reset high pressure cut out, low pressure cut out, suction and discharge service valve, reversible oil pump, and suction line strainer

NOTE: INDICATE COOLING LIQUID (WATER, GLYCOL SOLUTION ETC.), ENTERING LIQUID TEMPERATURE, GPM AND FOULING FACTOR ON SCHEDULE

K.	Condensors shall be cleanable shell and tube type with removable heads and ASME stamped. Each condenser shall be constructed of steel shell, non-ferrous tube and cast iron heads. Condenser shall be suitable for water working pressure of _____ psig with ____ way water regulating valve to maintain condenser head pressure

L.	Each refrigerant circuit shall be complete with refrigerant relief combination filter and drier in liquid line with two replacable cartridges similar to Sporlan Catchall replaceable core type, combination sight-glass with moisture indicator similar to sporlan See-All, charging valves and liquid line solenoid valve similar to Sporlan Molded High Temperature Coil Valve.

NOTE: SHOW TYPICAL COIL CONNECTION DETAIL ON DRAWING.

EHEAT

M.	Steam reheat coils shall be constructed of copper tubes aluminum fins and galvinized steel tube support sheets with 2 way modulating control valve, strainer, balancing valve and gate valve

NOTE: MINIMUM WORKING PRESSURE 125 PSIG. TYPICAL COIL CONNECTION DETAIL ON DRAWINGS

N.	Hot water reheat coil shall be constructed of copper tubes, aluminum fins and galvanized steel tube support sheets and suitable for working pressure of ---- psig. Coil shall be complete with 2 way modulating control valve, strainer, balancing valve and gate valve.

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT. INDICATE NUMBER OF STAGES ON SCHEDULES

O.	Reheat coil shall be electric resistance type, low watt density, fin tublar construction, with automatic high temperature overload potection, safety cut out for no air flow and high discharge air temperature cut out. Sheath temperature shall not exceed 420 deg F.

EHEAT

UMID

P.	Humidifier shall be infrared type with high quartz lambs mounted above a stainless steel pan,water make up controls and programmable automatic flush control

Q.	Humidifier shall be electronic steam humidifier with replaceable cylinder, solid state control, electric boiler, steam distribution manifold, fill and drain solenoid valves, variable capacity potentiometer and contactors. Unit shall automatically control the capacity of steam produced, adjust the frequency and duration of blow down cycle and emit audio and visual alarms in the event of failure

UMID

R.	Control cabinet

1.	Control cabinet shall be factory mounted and prewired with magnetic starters and with overload protection for each motor, automatic time delay restart, terminal block, and main power raceway.

AIL

2.	Automatic time delay restart shall start the unit in the event of power failure

3.	Automatic delay restart shall sequentially start all the units in the event of power failure

AIL

S.	AUTOMATIC CONTROL

NOTE: LIBERTS UNIT LEVEL O CONTROL AND MOINTOR SYSTEM. USE PARAGRAPHS 1 AND 2

1.	Automatic control system and mointor panel shall be microprocessor based,factory monted, prewired with sensitivity adjustment buttons, stop start push buttons and LED display as follows

a.	Set-point temperature in deg F.

b.	Current temperature in deg F.

c.	Temperature controller set point: 65 deg F to 85 deg F.

d.	Temperature sensitivity: plus or minus 1 deg F to 5 deg F in 0.1 increments

e.	Current Humidity in percent (%) RH.

f.	Humidity set point 40% to 60% RH.

g.	Humidity sensitivity 1% to 10% RH in 0.1 increments.

h.	Alarm conditions shall activate an audigle and visual indicator, as follows

(1)	High temperature.

(2)	Low temperature.

(3)	High humidity.

(4)	Low humidity.

(5)	Change air filters.

(6)	Loss of air flow.

(7)	High head pressure.

(8)	Local alarm

(9)	Common alarm terminal for connection to a remote alarm indicating device.

NOTE: UNDERFLOW SENSOR OPTION IS AVAILABLE.

(10)	Underfloor water sensors detector shall activate audible and visual alarm

2.	A battery back-up shall maintain programmed set points in the event of power failure Connection terminal for remote shutdown device

NOTE: LIBERTS UNIT LEVEL 10 CONTROL AND MONITOR SYSTEM. USE PARAGRAPHS 3 AND 4

3.	Automatic control system and mointor panel shall be microprocessor based,factory mounted, prewired with sensitivity adjustment button and LED display as follows

a.	Stop start push buttons.

b.	Set-point temperature in deg F.

c.	Current temperature in deg F.

d.	Temperature controller set point: 65 deg F to 85 deg F.

e.	Temperature sensitivity: plus or minus 1 deg F to 5 deg F in 0.1 increments

f.	Current Humidity in percent (%) RH.

g.	Humidity set point 40% to 60% RH.

h.	Humidity sensitivity 1% to 10% RH in 0.1 increments.

i.	Humidifier flush rate.

j.	Alarm conditions shall activate an audible and visual indicator, as follows

(1)	High temperature.

(2)	Low temperature.

(3)	Temperature Sensing.

(4)	Humidifier problem.

(5)	High humidity.

(6)	Low humidity.

(7)	Humidity Sensing.

(8)	Change air filters.

(9)	Loss of air flow.

(10)	High head pressure.

(11)	Low suction pressure.

(12)	Manual override.

(13)	Main fan overload.

(14)	Compressor overload.

(15)	Loss of Power.

(16)	Local alarm

(17)	Common alarm terminal for connection to a remote alarm indicating device.

NOTE: UNDERFLOOR OPTION IS AVAILABLE.

(18)	Underfloor water sensors detector shall activate audible and visual alarm

4.	A battery back-up shall maintain programmed set points in the event of power failure Connection terminal for remote shutdown device

NOTE: COORDINATE OPTIONAL EQUIPMENT AVAILABLE FROM MANUFACTURER. INDICATE CONDENSER PUMP SCHEDULE AND ALL ELECTRICAL REQUIREMENTS ON DRAWINGS

T.	Condensate pump shall be centrifugal type having a minimum capacity as noted with integral float switch, pump and motor assembly and reservoi

U.	Liquid detect sensors shall be solid state hermetically sealed, located under the raised floor as noted and wired to the terminal strip within unit

V.	Firestat shall be mounted in the control panel and sensor located in the return air. Firestat shall shut down the computer room air conditioner unit when activated

MOKE

W.	Smoke detector mounted in the control panel and sensor located in return air. Detector shall shut down the computer room air conditioner unit when activated

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT

X.	Smoke detector located in room shall shut down the computer room air conditioner unit when activated via the panel.

MOKE

NOTE: FOR COMPUTER ROOM AIR CONDITIONING UNIT WITH REMOTE AIR COOLED CONDENSING UNIT USE PARAGRAPH 2.05. (LIBERT DELUXE SYSTEM 3)

5)	SELF-CONTAINED COMPUTER ROOM UNIT FOR OPERATION WITH REMOTE AIR COOLED CONDENSER

NOTE: COORDINATE ACCESS FOR UNIT. ACCESS IS FROM FRONT PANEL AND SIDE PANELS FOR LIBERT. DELUXE SYSTEM/3.

A.	Cabinet exterior panels shall be constructed of minimum 18 gauge steel with 1 in. thick 1 1/2 lb. per cu.ft. fiberglass insulation. Finished color on panels shall be as approved by Architect and/or Engineer.

NOTE: OPTION 1 CAB* IS AVAILABLE WITH OR WITHOUT FLOOR STAND AND TURNING VANES

AB

B.	Unit shall be suitable for down flow air discharge with floor stand and turning vanes

C.	Unit shall be suitable for upflow air discharge and connection to duct work.

NOTE: OPTION 3 CAB* IS AVAILABLE WITH OR WITHOUT DISCHARGE GRILLE.

D.	Unit shall be suitable for upflow plenum discharge. Plenum shall be similar in construction to the cabinet with insulation and discharge grille

AB

NOTE: FILTERS INSIDE THE UNIT.

ETURN

E.	Unit shall be arranged for front return air connection.

NOTE: FILTERS OUTSIDE THE UNIT.

F.	Unit shall be arranged for rear return air connection.

ETURN

G.	Supply fans shall be double width, double inlet centrifugal type. Fan and motor assembly shall be statically and dynamically balanced in unit at factory. Ball bearings shall be permanently lubricated with minimum life of 100,000 hours. Fans motor shall be totally enclosed

RIVE

1.	Direct drive.

2.	Fan motors mounted on adjustable slide base. The fan drive shall be matched belts sized for 200 percent motor h.p with variable pitch pulley.

RIVE

H.	Filters shall be 4 inches deep, pleated throwaway type rated not less than 45% efficient by the N.B.S. Dust Spot Method or 20% efficiency per ASHARE Test Standard 52-76

I.	Compressors shall be cast-iron semi-hermetic type, direct driven at 1750 rpm with oil sight glass, built in thermal overload, manual reset high pressure cut out, low pressure cut out, suction and discharge service valve, reversible oil pump, and suction line strainer

J.	A - Frame refrigerant cooling coil shall be constructed of copper tube with mechanically bonded aluminum fins. Coil shall be complete with distributor and thermostatic expansion valve with external equalizer

NOTE: SHOW TYPICAL COIL CONNECTION DETAIL ON DRAWING.

EHEAT

K.	Steam reheat coils shall be constructed of copper tubes aluminum fins and galvinized steel tube support sheets with 2 way modulating control valve, strainer, balancing valve and gate valve

NOTE: MINIMUM WORKING PRESSURE 125 PSIG. TYPICAL COIL CONNECTION DETAIL ON DRAWINGS

L.	Hot water reheat coil shall be constructed of copper tubes, aluminum fins and galvanized steel tube support sheets and suitable for working pressure of ----psig. Coil shall be complete with 2 way Modulating Control Valve, Strainer, balancing valve and gate valve.

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT. INDICATE NUMBER OF STAGES ON SCHEDULES

M.	Reheat coil shall be electric resistance type, low watt density, fin tublar construction, with automatic high temperature overload potection, safety cut out for no air flow and high discharge air temperature cut out. Sheath temperature shall not exceed 420 deg F.

EHEAT

UMID

N.	Humidifier shall be infrared type with high quartz lambs mounted above a stainless steel pan,water make up controls and programmable automatic flush control

O.	Humidifier shall be electronic steam humidifier with replaceable cylinder, solid state control, electric boiler, steam distribution manifold, fill and drain solenoid valves, variable capacity potentiometer and contactors. Unit shall automatically control the capacity of steam produced, adjust the frequency and duration of blow down cycle and emit audio and visual alarms in the event of failure

UMID

NOTE: INDICATE AIR ON CONDENSER FOR SUMMER, AND FAN-MOTOR HP ON SCHEDULE. INDICATE REFRIGERANT CIRCUIT AND PIPE SIZES ON DRAWINGS.

OND

P.	Outdoor air cooled condenser shall be constructed of copper tube and mechanically bonded aluminum fins encased in an aluminum casing with mounting legs suitable for vertical or horizontal air discharge, direct driven propellor fans factory mounted disconnect switch and factory mounted control panel. Condenser shall be supplied with controls to maintain condenser head pressure in winter as follows:

NOTE: FOR AMBIENT TEMPERATURE AS LOW AS MINUS 20 DEG F.

EAD

1.	Condenser head pressure shall be maintained by varying the speed of the fan

NOTE: FOR AMBIENT TEMPERATURE AS LOW AS MINUS 30 DEG F.

2.	Condenser head pressure shall be maintainde by modulating three way modulating valves. Control package shall include a insulated heated receiver, pressure relief valve, shut of valves and refrigerant piping. Heater shall be suitable for:

EAD

EAT

a.	115 volts single phase 60 HZ electric supply.

b.	208 volts single pahse 60 HZ electric supply.

EAT

NOTE: COORDINATE NC LEVELS, ELECTRICAL REQUIREMENTS, INDICATE HEIGHT OF FLOOR STAND AND DISCHARGE OF AIR

Q.	Indoor self contained air cooled condenser unit shall be consructed of copper tubes and mechanically Bonded aluminum fins with centrifugal fan, 4 inch thick pleated filters rated not less than 20% efficient per ARI standard 52-76, encased in a painted 18 gauge steel panels with 1 inch thick 1 1/2 lb. per cubic feet fiberglass insulaion. Final finish shall be as approved by Architect. Control panel shall be factory mounted and prewired with starters, fused disconnect switch and controls. Unit shall be suitable for ducted inlet and outlet.

OND

1.	Condenser head pressure controller shall modulate three way valve to maintain head pressure at ambient temperature as low as minus 30 deg f. Control package shall include an insulated electrically heated liquid receiver. Heater shall be suitable for ---- volts --- phase ---- HZ.

2.	Fans shall be double inlet, double width backward inclined mounted on steel shaft with ball bearings, matched vee belt drive, pulleys and motor. Ball bearings shall be permanently lubricated with minimum life of 100,000 hours. Vee belt drive shall be sized for 200 percent motor hp

R.	Each refrigerant circuit shall be complete with refrigerant relief combination filter and drier in liquid line with two replacable cartridges similar to Sporlan Catchall replaceable core type, combination sight-glass with moisture indicator similar to Sporlan See-All, charging valves and liquid line solenoid valve similar to Sporlan Molded High Temperature Coil Valve.

S.	Control cabinet

1.	Control cabinet shall be factory mounted and prewired with magnetic starters with overload protection for each motor, automatic time delay restart, terminal block, and main power raceway.

AIL

2.	Automatic time delay restart shall start the unit in the event of power failure

3.	Automatic delay restart shall sequentially start all the units in the event of power failure

AIL

T.	AUTOMATIC CONTROL

NOTE: LIBERTS UNIT LEVEL O CONTROL AND MONITOR SYSTEM. USE PARAGRAPHS 1 AND 2

1.	Automatic control system and mointor panel shall be microprocessor based,factory monted, prewired with sensitivity adjustment buttons. Stop start push buttons and LED display as follows

a.	Set-point temperature in deg F.

b.	Current temperature in deg F.

c.	Temperature controller set point: 65 deg F to 85 deg F.

d.	Temperature sensitivity: plus or minus 1 deg F to 5 deg F in 0.1 increments

e.	Current Humidity in percent (%) RH.

f.	Humidity set point 40% to 60% RH.

g.	Humidity sensitivity 1% to 10% RH in 0.1 increments.

h.	Alarm conditions shall activate an audigle and visual indicator, as follows

(1)	High temperature.

(2)	Low temperature.

(3)	High humidity.

(4)	Low humidity.

(5)	Change air filters.

(6)	Loss of air flow.

(7)	High head pressure.

(8)	Local alarm

(9)	Common alarm terminal for connection to a remote alarm indicating device.

NOTE: UNDERFLOW SENSOR OPTION IS AVAILABLE.

(10)	Underflow water sensors detector shall activate audible and visual alarm

2.	A battery back-up shall maintain programmed set points in the event of power failure Connection terminal for remote shutdown device

NOTE: LIBERTS UNIT LEVEL 10 CONTROL AND MOINTOR SYSTEM. USE PARAGRAPHS 3 AND 4

3.	Automatic control system and mointor panel shall be microprocessor based,factory mounted, prewired with sensitivity adjustment button and LED display as follows

a.	Stop start push buttons.

b.	Set-point temperature in deg F.

c.	Current temperature in deg F.

d.	Temperature controller set point: 65 deg F to 85 deg F.

e.	Temperature sensitivity: plus or minus 1 deg F to 5 deg F in 0.1 increments

f.	Current Humidity in percent (%) RH.

g.	Humidity set point 40% to 60% RH.

h.	Humidity sensitivity 1% to 10% RH in 0.1 increments.

i.	Humidifier flush rate.

j.	Alarm conditions shall activate an audible and visual indicator, as follows

(1)	High temperature.

(2)	Low temperature.

(3)	Temperature Sensing.

(4)	Humidifier problem.

(5)	High humidity.

(6)	Humidity sensing.

(7)	Low humidity.

(8)	Change air filters.

(9)	Loss of air flow.

(10)	High head pressure.

(11)	Low suction pressure.

(12)	Manual override.

(13)	Main fan overload.

(14)	Compressor overload.

(15)	Loss of power.

(16)	Local alarm.

(17)	Common alarm terminal for connection to a remote alarm indicating device.

NOTE: UNDERFLOOR SENSOR OPTION IS AVAILABLE.

(18)	Underfloor water sensors detector shall activate audible and visual alarm

4.	A battery back-up shall maintain programmed set points in the event of power failure Connection terminal for remote shutdown device

NOTE: COORDINATE OPTIONAL EQUIPMENT AVAILABLE WITH MANUFACTURER. INDICATE CONDENSATE PUMP SCHEDULE ON DRAWINGS

U.	Condensate pump shall be centrifugal type having a minimum capacity as noted with integral float switch, pump and motor assembly and reservoir

V.	Liquid detect sensors shall be solid state hermetically sealed, located under the raised floor as noted and wired to the terminal strip within unit

W.	Firestat shall be mounted in the control panel and sensor located in the return air. Firestat shall shut down the computer room air conditioner unit when activated

MOKE

X.	Smoke detector mounted in the control panel and sensor located in return air. Detector shall shut down the computer room air conditioner unit when activated

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT

Y.	Smoke detector located in room shall shut down the computer room air conditioner unit when activated via the panel.

MOKE

NOTE: GLYCOL COOLED COMPUTER ROOM UNIT WITH ECONOMIZER COIL AND REMOTE AIR COOLED GLYCOL COOLER. USE PARAGRAPH 2.06 (LIBERT DELUXE SYSTEM 3)

6)	SELF CONTAINED COMPUTER ROOM UNIT FOR OPERATION WITH REMOTE AIR COOLED GLYCOL COOLER

NOTE: COORDINATE ACCESS FOR UNIT. ACCESS IS FROM FRONT PANEL AND SIDE PANELS FOR LIBERT. DELUXE SYSTEM/3.

A.	Cabinet exterior panels shall be constructed of minimum 18 gauge steel with 1 in. thick 1 1/2 lb. per cu.ft. fiberglass insulation. Finished color on panels shall be as approved by Architect and/or Engineer.

NOTE: OPTION 1 CAB* IS AVAILABLE WITH OR WITHOUT FLOOR STAND AND TURNING VANES

AB

B.	Unit shall be suitable for down flow air discharge with floor stand and turning vanes

C.	Unit shall be suitable for upflow air discharge and connection to duct work.

NOTE: OPTION 3 CAB* IS AVAILABLE WITH OR WITHOUT DISCHARGE GRILLE.

D.	Unit shall be suitable for upflow plenum discharge. Plenum shall be similar in construction to the cabinet with insulation and discharge grille

AB

NOTE: FILTERS INSIDE THE UNIT.

ETURN

E.	Unit shall be arranged for front return air connection.

NOTE: FILTERS OUTSIDE THE UNIT.

F.	Unit shall be arranged for rear return air connection.

ETURN

G.	Supply fans shall be double width, double inlet centrifugal type. Fan and motor assembly shall be statically and dynamically balanced in unit at factory. Ball bearings shall be permanently lubricated with minimum life of 100,000 hours. Fans motor shall be totally enclosed

RIVE

1.	Direct drive.

2.	Fan motor mounted on adjustable slide base. The fan drive shall be matched belts sized for 200 percent motor h.p with variable pitch pulley.

RIVE

H.	Filters shall be 4 inches deep, pleated throwaway Type rated not less than 45% efficient by the N.B.S. Dust Spot Method or 20% efficiency per ASHARE Test Standard 52-76

I.	A - Frame refrigerant cooling coil shall be constructed of copper tube with mechanically bonded aluminum fins. Coil shall be complete with distributor and thermostatic expansion valve with external equalizer

J.	Compressors shall be cast-iron semi-hermetic type, direct driven at 1750 rpm with oil sight glass, built in thermal overload, manual reset high pressure cut out, low pressure cut out, suction and discharge service valve, reversible oil pump, and suction line strainer

NOTE: INDICATE COOLING LIQUID (WATER, GLYCOL SOLUTION ETC.), ENTERING LIQUID TEMPERATURE, GPM AND FOULING FACTOR ON SCHEDULE

K.	Condensors shall be cleanable shell and tube type with removable heads and ASME stamped. Each condenser shall be constructed of steel shell, non-ferrous tube and cast iron heads. Condenser shall be suitable for water working pressure of _____ psig with ____ way water regulating valve to maintain condenser head pressure

L.	Each refrigerant circuit shall be complete with refrigerant relief combination filter and drier in liquid line with two replacable cartridges similar to Sporlan Catchall replaceable core type, combination sight-glass with moisture indicator similar to Sporlan See-All, charging valves and liquid line solenoid valve similar to Sporlan Molded High Temperature Coil Valve.

M.	Glycol economy coil shall be constructed of copper tube with mechanically bonded aluminum fins. Coil shall be suitable for owrking pressure of .... psig with .... way automatic control valve, strainer, gate valve and globe valves

NOTE: SHOW TYPICAL COIL CONNECTION DETAIL ON DRAWING.

EHEAT

N.	Steam reheat coils shall be constructed of copper tubes aluminum fins and galvanized steel tube support sheets with 2 way modulating control valve, strainer,gate valves and F&T trap as noted

NOTE: MINIMUM WORKING PRESSURE 125 PSIG. TYPICAL COIL CONNECTION DETAIL ON DRAWINGS

O.	Hot water reheat coil shall be constructed of copper tubes, aluminum fins and galvanized steel tube support sheets and suitable for working pressure of ----psig. 2 way Modulating Control Valve, Strainer, balancing valve and gate valve.

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT. INDICATE NUMBER OF STAGES ON SCHEDULES

P.	Reheat coil shall be electric resistance type, low watt density, fin tublar construction, with automatic high temperature overload potection, safety cut out for no air flow and high discharge air temperature cut out. Sheath temperature shall not exceed 420 deg F.

EHEAT

UMID

Q.	Humidifier shall be infrared type with high quartz lambs mounted above a stainless steel pan,water make up controls and programmable automatic flush control

R.	Humidifier shall be electronic steam humidifier with replaceable cylinder, solid state control, electric boiler, steam distribution manifold, fill and drain solenoid valves, variable capacity potentiometer and contactors. Unit shall automatically control the capacity of steam produced, adjust the frequency and duration of blow down cycle and emit audio and visual alarms in the event of failure

UMID

NOTE: INDICATE AIR ON DRY COOLER FOR SUMMER AND WINTER, FAN MOTOR HP AND GLYCOL CIRCULATING PUMPS HP ON SCHEDULE. INDICATE GLYCOL SOLUTION USED AND PIPE SIZES ON DRAWINGS. DELETE NON-APPLICABLE AIR DISCHARGE

S.	Dry cooler shall be constructed of copper tubes and mechanically bonded aluminum fins encased in a aluminum casing with mounting legs suitable for vertical or horizontal air discharge, direct driven propellor fans, factory wired and factory mounted control panel. Glycol leaving temperature shall be maintained by varying the speed of the fan

1.	Expansion tank for the dry cooler shall be as follows:

ANK

a.	Open tank.

NOTE: MAKE UP PUMPS ARE NORMALLY NOT REQUIRED FOR SHALL GLYCOL SYSTEM.

b.	Closed tank constructed and stamped in accordance withthe requirements of ASME code. Refer to "SPECIFICATION SECTION ......" for closed expansion tank, make up tank and make up pumps.

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT. INDICATE SINGLE OR DUAL GLYCOL PUMP REQUIREMENTS ON SCHEDULE. SHOW TYPICAL PUMP DETAIL ON DRAWINGS

2.	Pumps for Glycol circulation shall be single stage centrifugal pumps with enclosed bronze non-overloading impeller, and mechanical seal. Pump and motor assembly shall be mounted on steel baseplate. Pump and flanges shall be suitable for minimum of 125 psig working pressure.

3.	Pumps shall be mounted in a weatherproof enclosure. Dual pumps shall be complete with automatic change over controls.

T.	Control cabinet.

1.	Control cabinet shall be factory mounted and prewired with magnetic starters with overload protection for each motor, automatic time delay restart, terminal block, and main power raceway.

AIL

2.	Automatic time delay restart shall start the unit in the event of power failure

3.	Automatic delay restart shall sequentially start all the units in the event of power failure

AIL

U.	AUTOMATIC CONTROL

NOTE: LIBERTS UNIT LEVEL O CONTROL AND MOINTOR SYSTEM USE PARAGRAPHS 1 AND 2

1.	Automatic control system and mointor panel shall be microprocessor based,factory monted, prewired with sensitivity adjustment buttons, stop start push buttons and LED display as to follows

a.	Set-point temperature in deg F.

b.	Current temperature in deg F.

c.	Temperature controller set point: 65 deg F to 85 deg F.

d.	Temperature sensitivity: plus or minus 1 deg F to 5 deg F in 0.1 increments

e.	Current Humidity in percent (%) RH.

f.	Humidity set point 40% to 60% RH.

g.	Humidity sensitivity 1% to 10% RH in 0.1 increments.

h.	Alarm conditions shall activate an audible and visual indicator, as follows

(1)	High temperature.

(2)	Low temperature.

(3)	High humidity.

(4)	Low humidity.

(5)	Change air filters.

(6)	Loss of air flow.

(7)	High head pressure.

(8)	Local alarm.

(9)	Common alarm terminal for connection to a remote alarm indicating device.

NOTE: UNDERFLOW OPTION IS AVAILABLE.

(10)	Underfloor water sensors detector shall activate audible and visual alarm

2.	A battery back-up shall maintain programmed set points in the event of power failure Connection terminal for remote shutdown device

NOTE: LIBERTS UNIT LEVEL 10 CONTROL AND MOINTOR SYSTEM USE PARAGRAPHS 3 AND 4

3.	Automatic control system and mointor panel shall be microprocessor based,factory mounted, prewired with sensitivity adjustment buttons, and LED display as follows

a.	Stop start push buttons.

b.	Set-point temperature in deg F.

c.	Current temperature in deg F.

d.	Temperature controller set point: 65 deg F to 85 deg F.

e.	Temperature sensitivity: plus or minus 1 deg F to 5 deg F in 0.1 increments

f.	Current Humidity in percent (%) RH.

g.	Humidity set point 40% to 60% RH.

h.	Humidity sensitivity 1% to 10% RH in 0.1 increments.

i.	Alarm conditions shall activate an audigle and visual indicator, as follows

(1)	High temperature.

(2)	Temperature sensing.

(3)	Humidifier problem.

(4)	Low temperature.

(5)	High humidity.

(6)	Low humidity.

(7)	Humidity sensing.

(8)	Change air filters.

(9)	Loss of air flow.

(10)	High head pressure.

(11)	Low suction pressure.

(12)	Manual override.

(13)	Main fan overload.

(14)	Compressor overload.

(15)	Loss of Power.

(16)	Local alarm

(17)	Common alarm terminal for connection to a remote alarm indicating device.

NOTE: UNDERFLOOR DETECTOR OPTION IS AVAILABLE.

(18)	Underfloor water sensors detector shall activate audible and visual alarm

4.	A battery back-up shall maintain programmed set points in the event of power failure Connection terminal for remote shutdown device

NOTE: COORDINATE OPTIONAL EQUIPMENT AVAILABEL WITH MANUFACTURER. INDICATE CONDENSATE PUMP SCHEDULE ON DRAWINGS

NOTE: COORDINATE OPTIONAL EQUIPMENT AVAILABEL WITH MANUFACTURER. INDICATE CONDENSATE PUMP SCHEDULE ON DRAWINGS

V.	Condensate pump shall be centrifugal type having a minimum capacity as noted with integral float switch, pump and motor assembly and reservoir

W.	Liquid detect sensors shall be solid state hermetically sealed. Water sensors located under the raised floor as noted and wired to the terminal strip within unit

X.	Firestat shall be mounted in the control panel and sensor located in the return air. Firestat shall shut down the computer room air conditioner unit when activated

MOKE

Y.	Smoke detector mounted in the control panel and sensor located in return air. Detector shall shut down the computer room air conditioner unit when activated

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT

Z.	Smoke detector located in room shall shut down the computer room air conditioner unit when activated via the panel.

MOKE

Part 3 -	EXECUTION

1)	INSTALLATION

A.	Provide minimum 1 1/4 inch condensate drain piping from drain pan to floor drain. Provide trap seal with a minimum seal equal to static pressure in drain pan to prevent air leakage

B.	Provide refrigerant relief from the unit to the atmosphere.

NOTE: FOR UNITS COOLED WITH COOLING TOWER WATER.

C.	Provide flow switch in the condenser water return connection to the unit.

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

2)	FIELD QUALITY CONTROL

A.	Test refrigerant piping in accordance with authorities having jurisdiction.