HOT WATER SYSTEM

NOTE: FINAL COPY: APRIL, 1988.

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.	Piping.

2.	Pumps.

3.	Expansion tank.

HEAT

4.	Heat exchanger.

5.	Convertor.

HEAT

6.	Direct radiation.

7.	Unit heaters.

8.	Cabinet type unit heaters.

9.	Water heating by steam convertor.

10.	Water heating by hot water boilers.

11.	Water heating by heat exchanger.

2)	RELATED WORK AND REQUIREMENTS

A.	Requirements of GENERAL CONDITIONS, DIVISION NO.1 and Section 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.	FAN COIL SYSTEM.

3.	HOT WATER BOILER PLANT (Larger than 2000 MBH).

4.	INSULATION

5.	MOTORS

6.	MOTOR CONTROLLERS

7.	AUTOMATIC CONTROL SYSTEMS

8.	VIBRATION ISOLATION

9.	WATER TREATMENT

10.	THERMOMETERS, GAUGES AND RECORDING INSTRUMENTS.

11.	BALANCING AIR AND WATER SYSTEMS.

12.	-----.

3)	REFERENCE STANDARDS

A.	Published Specifications' standards, tests or recommended methods of trade, industry or governmental organizations apply to all 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

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

A.	Submit the following shop drawings to architect and/or Engineer

1.	Pumps, pump motors, pump curves, BHP, pump efficiency and MHP.

2.	Expansion tank including supports, piping and wiring diagrams

3.	Convertors.

4.	Heat exchangers.

5.	Direct radiation:

a.	Catalog cuts of elements and enclosures.

b.	Application schedule.

6.	Unit heaters.

7.	Cabinet type unit heaters.

Part 2 -	PRODUCTS

1)	BASE BID MANUFACTURERS

A.	Pumps:

NOTE: FOR OVER 50 HP OR FOR QUALITY PROJECTS USE THE FOLLOWING MANUFACTURER

1.	Allis-Chalmers Corp., Bell & Gossett Co., Ingersoll-Rand Co., Peerless Pump, Worthington Corp. and Fairbanks Morse

NOTE: FOR UNDER 50 HP OR SPECULATIVE PROJECTS INCLUDE THE FOLLOWING MANUFACTURERS

2.	Aurora Pump Co., Taco, Thrush, Pacific Pump Co. and Weinman Pump Co

B.	Convertor:

1.	Bell & Gossett Co., Patterson-Kelley Co. Inc. and Whitlock Mfg. Co

NOTE: FOR SPECULATIVE PROJECTS INCLUDE THE FOLLOWING MANUFACTURERS

2.	Yula Corp., Taco Heaters Co. and Sims Co.

C.	Heat exchangers:

1.	Bell & Gossett Co., Patterson-Kelley Co. Inc. and Whitlock Mfg. Co

NOTE: FOR SPECULATIVE PROJECTS INCLUDE THE FOLLOWING MANUFACTURERS

2.	Yula Corp., Taco Heaters Co. and Sims Co.

D.	Finned tube radiators: Dunham-Bush Inc., Sterling Radiator Co., Trane Co. and Vulcan Radiator Co

E.	Convectors: Trane Co., Dunham-Bush, Inc., Sterling Radiator Co. and Governale Bros. Inc

F.	Valves for direct radiation: Crane Co., Dunham-Bush Inc., Sarco Co. Inc. and ITT Hoffman

G.	Unit heaters: L.J. Wing Mfg. Co., Modine Mfg. Co., Trane Co. and Mcquay, Division of McQuay-Perfex Inc

H.	Unit heaters - cabinet type: American Air Filter Co. Inc., McQuay, Division of McQuay-Perfex Inc., Modine Mfg. Co. and Trane Co

2)	PIPING AND ACCESSORIES

A.	Refer to Section "PIPING" for supply and return, fill and make-up water and runouts from riser to units

B.	Runouts, as follows:

1.	Wrought copper fittings.

NOTE: CONSIDER USING SOLDERED JOINTS IN GENERAL. CHECK WORKING PRESSURES. TO 1 INCH TUBING AND 250 DEG F MAXIMUM OPERATIN HOT WATER TEMPERATURE 95-5 SOLDERED JOINTS ARE SUITABLE T 200 PSIG AND SILVER BRAZED JOINTS TO 300 PSIG

JOINT

2.	Soldered joints.

3.	Silver brazed joints.

JOINT

4.	Connections to steel pipe, shall be insulating coupling with steel jacket and threaded epoxy impregnated nylon insert, similar to Water Vollett Co., Detroit, Michigan, V-Line

C.	Valves, fittings, flanges, joints and accessories, as follows:

NOTE: FOR SYSTEM DESIGN PRESSURE UNDER 100 PSIG AT 250 DEG F.

1.	Minimum 125 lb wsp or 200 lb wog except cast iron 150 lb and welded fittings, as specified under Section "Piping"

NOTE: FOR SYSTEM DESIGN PRESSURES TO 175 PSIG SP AT 250 DEG F.

a.	From ----- floor and below, provide 250 lb wsp or 300 wog

NOTE: FOR SYSTEM DESIGN PRESSURES TO 225 PSIG AT 250 DEG F.

b.	----- floor and below, provide 250 lb wsp or 300 lb wog

D.	Balancing valves and fittings for direct radiation and unit heaters as follows

1.	Valves shall be manually operated, union end, modulating, packless, similar to Sarco Series RP with seats drilled for minimum circulation when in closed position

2.	Balancing fittings with cap, similar to Sarco Balance-Master 1BW

NOTE: REVIEW PUMP SPECIFICATION WITH CENTRAL UTILITIES GROUP FOR HIGH TEMPERATURE WATER APPLICATIONS

3)	PUMPS

A.	Except where noted otherwise, pumps shall be single stage centrifugal pumps, with flexible motor coupling, pump motor, shaft seals, and enclosed bronze impeller. Pump and motor assembly shall be on cast iron or rolled steel baseplate with raised lip rim and drain tappings. Motors shall be non-overloading over the entire range. Seals shall be as follows

NOTE: MECHANICAL SEALS PREFERRED.

PACKED

1.	Packed stuffing boxes with split bronze glands and brass studs

2.	Single, inside mounted, end face rubber bellows type mechanical seals with stainless steel springs, brass or stainless steel seal head, babbitt filled carbon rotating washer and tungsten carbide stationary seat. Glands shall be bronze or stainless steel, water flush design to provide flush across face of mechanical seal. Provide by-pass line from pump discharge through cyclone type separator to flush gland. Coordinate construction and type with water treatment as specified in Section "WATER TREATMENT"

NOTE: USE FOR SUCTION PRESSURE UP TO 150 PSIG.

MECHNAICAL SEAL

a.	For suction pressures less than 150 psig, provide seal similar to John Crane Type 1

NOTE: USE WHERE SUCTION PRESSURE EXCEEDS 150 PSIG.

b.	For suction pressure 150 psig or greater, provide balanced construction seal, similar to John Crane Type 1B

MECHNAICAL SEAL

PACKED

B.	Pump and motor capacities shall be minimum as noted, suitable for parallel operation and with motor designed to operate over entire capacity range of pump without exceeding horsepower rating. Pump shall be designed to operateat 25 percent beyond design capacity without exceeding breakoff point. Impeller diameter shall be maximum 90 percent difference between maximum and minimum of published impeller diameters

C.	Pump characteristics: Pump curve shall be continuous rise from maximum capacity to shutoff. Shutoff head approximately 10 percent greater than design head and operating at or near peak efficiency.

D.	Alignment shall be by pump manufacturer, at start-up with dial indicator of plus or minus 0.002 inch accuracy. Certify in writing that alignment work has been performed by manufacturer's personnel and that pumps are operating in accordance with design requirements

E.	Pumps shall be tested and designed to withstand 1 1/2 times specified working pressure

F.	Horizontal split case double suction type pump, as follows:

FLANGES

1.	Pump and flanges shall be 125 psig working pressure.

2.	Pump and flanges shall be 250 psig working pressure.

FLANGES

3.	Shaft shall be 416 stainless steel.

NOTE: FOR PACKED PUMPS.

SLEEVE

4.	Renewable shaft sleeves shall be 17 percent chrome stainless steel, heat treated and hardened or ceramic coated stainless steel. Hardness shall be minimum 600 Brinell

NOTE: FOR MECHANICAL SEALS.

5.	Renewable shaft sleeves shall be unhardened 416 stainless steel

SLEEVE

6.	Trim, shaft nut and stuffing box bushing shall be bronze. Casing and impeller wearing rings shall be renewable, dissimilar bronze of hardness to insure maximum protection against galling.

7.	Flanged suction and discharge connection.

BRNG

8.	Bearings shall be ball, oil lubricated with constant level oiler with rated life of 80,000 hours

9.	Bearings shall be ball, grease lubricated in moisture and dust proof housings with rated life of 80,000 hours. Cartridge bearings which cannot be lubricated will not be acceptable

BRNG

10.	Bearings brackets shall be provided with overflow holes to prevent flooding. Bearing housing shall be dowelled to bearig bracket

11.	All metal flexible couplings, self aligning type with all metal similar to Waldron, Thomas, Falk or Fast with removable sheet metal coupling guard. Pumps similar to Peerless Type A or AD (Series 5100) or Worthington Type LR

NOTE: AVOID THIS TYPE OF PUMP ON SUCH PROJECTS AS THEATERS, HOTELS, DORMITORIES, ETC. DUE TO INTEGRAL NOISE

G.	Vertical split case type pumps, as follows:

PUMP

1.	Pump and flanges shall be 125 psig working pressure.

2.	Pump and flanges shall be 250 psig working pressure.

PUMP

3.	Steel shaft, bronze trim and renewable bronze casing wearing rings

NOTE: FOR PACKED PUMPS.

SLEEVE

4.	Renewable shaft sleeves shall be 17 percent chrome stainless steel, heat treated and hardened or ceramic coated stainless steel. Hardness shall be minimum 600 Brinell

NOTE: FOR MECHANICAL SEALS.

5.	Renewable shaft sleeves shall be unhardened 416 stainless steel

SLEEVE

6.	Ball bearings shall be, grease lubricated, suitable for in-service lubrication. Pumps similar to Peerless Type F or Worthington D-1000

4)	IN-LINE CIRCULATORS

A.	Vertical split, flanged, cast iron, bronze fitted pumps with enclosed centrifugal type bronze impeller and rated for 125 psig working pressure

B.	Mechanical seals: Coordinate seal construction with water treatment as specified in Section "WATER TREATMENT"

C.	Circulators with coupling connected and bolted to oil lubricated sleeve bearing motor. Pump similar to Bell & Gossett Booster Pump or Series 60

5)	EXPANSION TANK

TYPE

A.	Open type:

1.	Welded steel tank, rated for 15 psig working pressure, galvanized after fabrication and constructed in accordance with the ASME Code for Unfired Pressure Vessels, of a size, capacity and arrangement, as noted. Tank complete with connections, tappings, protected full height gauge glass with shutoff valves, structural steel supports and drain cock, as follows

HOLE

a.	Gasketed handhole.

b.	Gasketed manhole.

HOLE

NOTE: USE WHERE ALARM DESIRED AND COORDINATE WITH ELECTRICAL DEPT. USE TYPE 63 SWITCH FOR WORKING PRESSURE UPTO 50 PSI

2.	High and low water alarm switches to actuate high and low water alarm, similar to McDonnell Miller Type 63

3.	Float operated valve to maintain water level in tank, similar to McDonnell Miller No. 25 A

B.	Closed type:

1.	Welded steel tank, rated for noted working pressure, galvanized after fabrication and constructed in accordance with the ASME Code for Unfired Pressure Vessels, ASME stamped, of a size, capacity and arrangement, as noted. Tank complete with connections, tappings, full height protected, gauge glass with shutoff valves structural steel supports, relief valve and drain cock, as follows

HOLE

a.	Gasketed handhold.

b.	Gasketed manhole.

HOLE

NOTE: USE WHERE ALARM DESIRED AND COORDINATE WITH ELECTRICAL DEPT. USE TYPE 63 SWITCH FOR WORKING PRESSURE UP TO 50 PSIG AND TYPE 93 SWITCH FOR WORKING PRESSURE FROM 51 TO 150 PSIG

2.	High and low water alarm switches to actuate high and low water alarm

LARM

a.	Alarm similar to McDonnell Miller Type 63.

b.	Alarm similar to McDonnell Miller Type 93.

LARM N. NOTE: COORDINATE WITH EXPANSION TANK DETAIL

3.	Pressure reducing and relief valves similar to Bell & Gossett. Reducing valve shall be with built in strainer and check valve. ASME relief valves shall be diaphragm type with test lever and drain

4.	Make-up feeder tank and pump assembly: Tank and check valve shall be as specified for expansion tank with a working pressure of 15 psig. For systems with automatic water feed, provide float operated valve to maintain water level similar to McDonnell Miller No. 25A

5.	Glycol transfer pump shall be in-line, vertical split, centrifugal type glycol transfer pump; similar to Bell & Gossett Booster Pump

NOTE: GLYCOL SYSTEMS SHOULD BE FILLED MANUALLY. AUTOMATIC LEVEL CONTROLLER IS NOT NECESSARY

6.	Level controller shall operate make-up water pumps and solenoid valve to maintain water level, similar to McDonnell Miller No. 150. This is not required for Glycol System

NOTE: CHECK DUTY AND SELECT PROPER PUMP TYPE.

MAKE

7.	Make-up water pumps shall be vertical split, close coupled, centrifugal type, similar to Peerless Type C

8.	Make-up water pumps shall be close coupled, turbine type, bronze fitted, with mechanical seals, repalceable channel rings, and in-line suction and discharge openings in casings, similar to Worthington Type TC

NOTE: USE OF DIAPHRAGM TYPE EXPANSION TANKS SHOULD BE LIMITED TO SYSTEM PRESSSURES OF 100 PSIG, TEMPERATURES OF 200 DEG F AN BUILDING SIZES UP TO 400,000 GROSS SQ. FT

MAKE

C.	Closed welded steel tank diaphragm type, rated for 125 psig working pressure, galvanized after fabrication shall be constructed in accordance with ASME Code for Unfired Pressure Vessels, ASME stamped and of a size, capacity and arrangement, as noted. With connections, tappings and pre-pressurized diaphragm suitable for 240 deg F operating temperature. Air shall be precharged to pressure as noted on the drawings. Tank with integral base mount or factory furnished saddles. Tank similar to Amtrol AAX or L Series Extrol Expansion Tank

1.	Make-up feeder tank and pump assembly as follows:

a.	Tank materials and rating specified for expansion tank with a working pressure of 15 psig

(1)	For systems with automatic water feed: float operated valve to maintain water level similar to McDonnell Miller No.25A

b.	In-line, vertical split, centrifugal type glycol transfer pump, similar to Bell & Gossett Booster Pump

NOTE: GLYCOL SYSTEMS SHOULD BE FILLED MANUALLY. AUTOMATIC PUMP CONTROL IS NOT NECESSARY

c.	Low and high pressure switches to operate make-up water pump and solenoid valve to maintain water level in expansion tank and to sound alarm.

NOTE: CHECK DUTY AND SELECT PROPER PUMP TYPE.

MAKE

d.	Make-up water pumps shall be vertical split, close coupled, centrifugal type, similar to Peerless Type C

e.	Make-up water pumps shall be close coupled, turbine type, bronze fitted with mechanical seals, replaceable channel rings and in-line suction discharge openings in casings, similar to Worthington TC

MAKE

TYPE

HEAT

6)	HEAT EXCHANGER

A.	Shell and tube type heat exchanger, ASME stamped, with flanged dished head at end of shell flanged connections, 3/4 inch OD No. 18 BWG copper tubes, pressure relief valves in accordance with ASME and supports. Supports shall be welded pipe stand or structural base supports

NOTE: COORDINATE WITH DESIGNER'S SELECTION.

UBES

1.	U-tube configuration.

2.	Straight tube configuration; channel heads with removable cover plates at both ends

TUBES

3.	Design working pressures:

PRESS

a.	Tubes shall be 150 psig.

b.	Tubes shall be 200 psig.

PRESS

c.	Shell shall be 150 psig.

NOTE: THIS FOULING FACTOR TYPICAL FOR TREATED WATER IN CLOSED SYSTEMS

4.	Fouling factor shall be 0.0005 each side, 0.001 total.

NOTE: FOR U-TUBE.

MODEL

5.	Heat exchangers shall be similar to Patterson-Kelley"DW".

NOTE: FOR STRAIGHT TUBE.

6.	Heat exchangers shall be similar to Patterson-Kelley "O".

MODEL

7)	CONVERTOR

A.	Shell tube type convertor, ASME stamped, with flanged dished head at end of shell flanged connections, 3/4 inch OD No. 18 BWG copper tubes, prssure relief valves in accordance with ASME and supports. Supports shall be welded pipe stand

B.	Design working pressure.

TUBE

1.	Tubes shall be 150 psig.

2.	Tubes shall be 200 psig.

TUBE

3.	Shell shall be 150 psig.

C.	Fouling factor shall be 0.0005.

D.	Convertors similar to Patterson-Kelley "DS".

HEAT

8)	DIRECT RADIATION

NOTE: THIS SPECIFICATION IS NOT APPLICABLE FOR SECURITY APPLICATIONS IN CORRECTIONAL AND PSYCHIATRIC FACILITIES

A.	Finned tube radiator elements:

1.	Finned tube elements having minimum capacities as shown on plans based on suitable water velocities and maximum of 48 fins/ft

2.	Elements shall be IBR tested and ratings approved by IBR. Tubes shall be expanded with fins embedded into tubes and bond guaranteed for life of element similar to Vulcan Linoector for Figures 42 and 43

NOTE: COORDINATE PRESSURE.

FT

3.	Steel fin tube shall be threaded steel pressure tubing designed for 250 psig with steel plate fins .026 inch

4.	Copper and aluminum fin tube shall be seamless copper tube guaranteed for 150 psig with aluminum plate fins .016 inch thick

NOTE: USE FOR ENCLOSURES BY GENERAL CONTRACTOR.

FT

ENCLOS

B.	Finned tube radiator enclosures will be provided by the General Contractor. Refer to architectural drawings for details. Slide cradle hangers with nylon slide plate maximum 4 feet - 0 inch on centers suitable for attachment to wall or floor, as indicated shall be sheet metal safing and supports for entire length of element to prevent air by-pass. Coordinate access panel locations with enclosure manufacturer to allow for routine maintenance

NOTE: USE FOR ENCLOSURES BY HVAC.

C.	Finned tube radiator enclosures: Minimum 16 ga. reinforced cold rolled steel with interlocking flush joints and no exposed fasteners. 1 1/2 x 3/16 steel brackets mounted on 3 feet - 0 inch center with nylon coated sliding saddles provided for each row of elements or bare tubing. Dampers shall be 18 ga. full length dampers, positive positioning, tamper-proof where required. Accessories for complete wall to wall installation including end closures, corners, trim strips, flush hinged 8 x 8 inch access doors at all valves and vents

1.	Continuous top support, as follows:

a.	Back panel, 20 gauge to position and align brackets, similar to Vulcan Dura Mount TYPE "A"

b.	Back panel When visible from exterior, similar to Vulcan Duramount TYPE "D"

2.	Modular construction: Fired flanged mullion sections at each window mullion where future partitions may be installed to permit removal of interlocking intermediate enclosure sections

3.	Zinc coated steel enclosures and accessory construction, as follows

FINISH

a.	Baked enamel finish of color selected by Architect

b.	Primed and ready for field painting.

FINISH

4.	Enclosure styles shall be as follows:

a.	Type A - Architectural type with heavy anodized extruded aluminum top, pencil proof outlet vanes factory assembled to front skirt with gussets at top, vertical stiffeners and double break at bottom, similar to Vulcan DURA VANE TYPE DV

b.	Type B - standard louvered type with pencil proof integral louvers, top and front stiffeners with styles, as follows

(1)	Type B1, slope top, similar to VULCAN TYPE DS

(2)	Type B2, rounded outlet, similar to Vulcan Type DR

(3)	Type B3, front outlet, similar to Vulcan Type DF

(4)	Type B4, top outlet, similar to Vulcan Type DT

c.	Type C - baseboard with pencil proof mini-louvers and narrow silhouette with styles, as follows

(1)	Type C1, slope top, similar to VULCAN TYPE FS

(2)	Type C2, flat top, similar to Vulcan TYPE FR.

d.	Special pedestal, floor mounted or modified, of sizes as noted on schedules to suit building construction with supports and accessories as required. See Details

D.	Convectors: Heating elements shall be with headers of cast iron or cast bronze

ENCLOS1

1.	Convector cabinets will be provided by the General Contractor. Coordinate access panel locations with convector cabinet manufacturer to allow for routine maintenance

2.	Convector cabinets. Front top and ends 16 ga. reinforced steel with factory applied prime coat and 18 ga. steel back with 1/2 inch celotex insulation applied at factory. Tamper-proof damper shall be provided where required. Access doors shall be flush hinged at valves and vents

a.	Cabinet style shall be as follows:

(1)	Fully recessed: Front outlet.

BOTTOM

(a)	Bottom inlet grille, similar to Trane Model R6

(b)	Bottom arch inlet, similar to Trane Model RK

BOTTOM

(2)	Partially recessed: Front outlet.

INLET

(a)	Bottom inlet grille, similar to Trane Model SG

(b)	Bottom open arch inlet, similar to Trane Model SK

INLET

(3)	Free standing.

TOP

(a)	Sloping top outlet.

(b)	Front outlet.

TOP

GRILLE

(c)	Bottom inlet grille, similar to Trane Model SFG

(d)	Bottom open arch inlet, similar to Trane Model FK

GRILLE

(4)	Wall hung.

FRONT

(a)	Sloping top outlet, similar to Trane Model SW

(b)	Front outlet, similar to Trane Model W

FRONT

ENCLOS1

ENCLOS

9)	UNIT HEATERS

A.	Unit heater with AMCA rated propeller fan, heating coil, totally enclosed fan motor, guard, casing and adjustable louvers. Heating coil shall be constructed of copper tubes with aluminum fins. Capacity shall be minimum as noted

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT.

B.	Multispeed, split-capacitor with speed regulator.

TYPE

C.	Horizontal type, similar to Trane Co. Model S.

D.	Vertical type, similar to Trane Co. Model P.

E.	Horizontal and vertical types as noted, similar to Trane Co. Model S and P

TYPE

10)	UNIT HEATERS - CABINET TYPE

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT.

A.	Cabinet heaters with direct driven AMCA rated centrifugal fans, motor, heating coil, filter, cabinet factory wired, UL listed and minimum capacities as noted

B.	Coil shall be copper tube and aluminum fins and 1/8 inch key operated air vent at top of each heating coil. Fans wheels shall be forward curved, double inlet with lubricated sleeve bearing mounted on steel fan board

FILTER

C.	Washable type filter.

D.	Disposable type filter.

FILTER

CAB

E.	Cabinet enclosure shall be No. 16 USSG, insulated cabinet with removable sections and doors for access to fan, motor and coil as follows

TYPE

1.	Fully recessed.

2.	Semi-recessed.

3.	Free standing.

4.	Ceiling mounted.

TYPE

F.	Duct collars for concealed cabinet.

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT.

CAB

G.	Motors:

H.	Units, similar to Trane Co., Force Flo.

Part 3 -	EXECUTION

1)	INSTALLATION

A.	Expansion tank: Provide make-up water connections from valved outlet provided under Plumbing Work

NOTE: RELIEF VALVES ONLY FOR CLOSED EXPANSION TANK WITHOUT MAKE-UP WATER PUMP

B.	Pipe relief valve to spill over floor drain.

C.	Swing joints: Provide 3 elbow type on supply and return connections to equipment piping system and risers

D.	Risers: Provide dirt pockets and draining system full size riser, 12 inches long at bottom of each riser and where noted

NOTE: FOR JOBS WHERE PRESSURES ARE LESS THAN 100 PSIG.

1.	Piping 100 psig or less: provide 3/4 inch hose gate valves, 125 lb wsp or 200 lb wog with capped hose connections

NOTE: USE WHERE PRESSURE IS MORE THAN 100 PSIG.

2.	Piping over 100 psig: provide 3/4 inch bronze globe valve, 250 wsp or 400 lb wog, or 3/4 inch ball valve 500 lb wog, piped to drain or service slop sink

3.	Provide riser shutoff valves in each riser runout.

E.	Direct radiation: Provide shut-off valves at supply and return ends of radiation elements. Valve handles shall be readily accessible. Provide balancing fittings at return end of radiation elements. Provide automatic temperature control valves at supply end and where noted. Pitch elements up in direction of flow. Provide 1/8 inch key operated air vent at top of each element

F.	Unit heaters: Provide manual control valves for each unit. Thermostat shall control motor

NOTE: USE ONLY WITH UNITS SUPPORTED FROM OVERHEAD CONSTRUCTION. OMIT FOR CABINET HEATERS

1.	Unit heater mounting: Suspend units from overhead construction with steel rods and vibration isolators Where overhead construction does not permit fastening of rods, provide additional framing