Powers 595 Series 11 Self-Operating Temperature Regulators - Thermal System - Manual

TO REMOVE THERMAL SYSTEM
1. Stop flow of fluid through the valve and line.
2. Drain tank or receptacle until fluid is below the level of the
bulb. If bulb is provided with separate well, the tank need
not be drained.
3. Unscrew retaining nut and remove bulb, leaving tank fitting
in position. CAUTION: Do not remove housing while bulb is
hot. Cool bulb at least 11°C [20°F] below lowest point on
the range. If regulator’s lowest range point is below 21°C
[70°F ], place bulb in ice water before proceeding. If lowest
point is below 7°C [45°F], pack in ice.
4. Note original position of temperature adjusting nut
assembly so it can be reset after installing the new ther-
mal system.
5. Turn adjusting nut assembly from right to left, releasing all
the spring force. Remove housing bolts and position indi-
cator and lift off thermal system.
TO INSTALL THERMAL SYSTEM
1. Place housing in position and replace housing bolts. If sys-
tem has range below 21° to 54°C [70° to 130°F], chill bulb
as described above before placing system in position.
2. Reset temperature nut assembly to its original position.
3. Slip bulb into position and tighten retaining nut securely.
(25mm x 229mm x 25mm x 508mm [1
″
x 9
″
x 1
″
x 20
″
]
bulbs installed horizontally must be installed with flat sur-
face marked “TOP” facing forward.)
TO TEST THERMAL SYSTEM
1. a. Heating regulators: raise temperature to the point at
which valve plug is seated.
b. Cooling regulators: raise temperature until valve is
just open.
2. Place a ruler on top of the packing gland assembly. Mark
the position where the ruler touches the stem.
3. a. Heating regulators: cool the bulb 16°C [30°F] below
control point so valve is fully open.
b. Cooling regulators: cool the bulb to the control point
so that valve is seated.
4. Place the ruler on packing gland assembly again, and
measure the distance the stem has moved. This stem
travel should be a minimum of 3.2mm for 13mm [1/8
″
for
1/2
″
] regulators to a minimum of 14.3mm for 98mm
[9 /16
″
for 4
″
] regulators. If there is no movement or only
partial movement, the system is defective and the near-
est Powers representative should be contacted.
For additional information on the No. 11 Regulator, refer to
Technical Instruction Forms TI595CD, TI595ST, TI595WM, and
TI595DB, or contact your nearest Powers representative.
INSTALLATION INSTRUCTIONS
No. 11 Regulator
Thermal System Replacement
1
2
3
4
5
Thermal
System
6
7
8
9
10
11
12
13
14
15
16
Item Part Name
1 Bulb
2 Retaining Nut
3 Housing
4 Bellows
5 Piston Plate
6 Spring
7 Stem Extension
8 Adjusting Screw
9 Housing Screws
Item Part Name
10 Temperature Adjusting
Setting Scale
11 Temperature Adjusting
Nut Assembly
12 Yoke and Bridge Assembly
13 Stem Lock Nut
14 Valve Stem
15 Yoke Lock Nut
16 Valve Bonnet
Not
Separable
OPERATING TOP PARTS LIST
II595-TSR
Form II595-TSR 0218 EDP# 6507705 Printed in U.S.A.
USA office: Phone: 800.669.5430 • Fax: 847.824.0627
www.powerscontrols.com
Canadian office: Phone: 888.208.8927 • Fax: 888.882.1979
© 2002 Powers, a Watts Industries Co.
A Watts Industries Co.