I.
15601-3
HYDRONIC HEATING SYSTEMS
PIPING AND SPECIALTIES
Thermometers:
1. | Furnish brass immersion thermowells where indicated on the Drawings.
2. Furnish two additional immersion thermometers suitable for all thermowells for
use in balancing and by operating personnel.
3. Furnish and install where indicated on the drawings 9-inch separable socket
mercury thermometer with a range of 30 to 240°F. Provide adjustable angle
type where required for proper visibility. Equal to Trerice industrial
thermometers.
Pressure Gauges:
1. | Furnish pressure gauge connections where indicated consisting of /4-inch take-
off and globe valve.
2. Furnish 0-100 PSI, 3-l/2-inch pressure gauge where indicated. Equal to Trerice
Model 600.
Expansion Compensator: Brass body with stainless steel or brass bellows capable of
l-inch minimum change in length.
Balancing/Flow Measuring Valve:
Meter connections with built-in check valve.
Integral pointer register in degree of valve opening.
Bubble tight shut-off.
125-pound working pressure.
. Equal to Bell & Gossett circuit setter.
ressure Relief Valve:
Diaphragm operated, ASME rated in BTU/hr.
Capacity shall exceed the maximum heating capacity of the protected device by
110% minimum. Set point shall be equal to or less than the normal working
pressure of the protected device.
3. Fluid shall not discharge into valve chamber.
4. Low blow-down differential.
5. | Equal to Bell & Gossett.
Ne PukRwn-
PART 3 - EXECUTION
3.1
INSTALLATION
A. Provide offsets in all pipe to place in proper position and avoid work of other trades.
B. Erect all piping to provide for easy and noiseless circulation of hot water under all
working conditions.
C. Use inverted eccentric fittings to reduce the size of the water mains.
D. Make proper allowances for the expansion and contraction of all piping. Anchor
piping where necessary to control expansion.
E. Install a sufficient number of unions for disassembling pipe around equipment.
F. Weld all steel piping 3 inches and larger in size. Weld or install screwed fittings in
pipe 2-1/2 inches and under in size.
G. Install piping level or slightly pitched upward in the direction of flow so that no air
pockets are formed in the piping.
H. Install pipe hangers to properly support all equipment and piping in accordance with
Specification Section 15094.
13089K
