MV100 ELECTRIC CONTROLLERS T100, T200 THERMOSTATIC CONTROLLERS AND V2000 RADIATOR VALVES

Table 6. T100 and T200 Settings and Corresponding Temperatures in °F (°C).

 

0

 

*

 

1

2

3

4

 

5

 

6

T100A,F

32 (0)

43

(6)

46

(8)

54 (12)

61 (16)

68 (20)

73

(23)

79

(26)

 

 

 

 

 

 

 

 

 

 

 

 

T100B,C

—

55

(13)

61

(16)

64 (18)

68 (20)

72 (22)

75 (24)

79

(26)a

T100M

—

43

(6)

61

(16)

64 (18)

68 (20)

72 (22)

75

(24)a

79

(26)a

T200

—

43

(6)

52

(11)

57 (14)

63 (17)

68 (20)

73

(23)

79

(26)

 

 

 

 

 

 

 

 

 

 

 

 

 

aSetting not marked on dial.

NOTE: Torque cartridge to 25 ft-lb.

Setpoint Locking or Limiting (T100A,F,M only)

A single temperature or range-limiting lock is available for the T100A,F,M. See Accessories in the Specifications section. Refer to the T100A,F,M Installation Instructions for procedural details.

SINGLE-PIPE STEAM APPLICATIONS

Many older buildings original heating systems were single-pipe steam. The advantage of single-pipe steam systems is lower initial cost, resulting from the use of less piping and elimination of radiator steam traps.

Cartridge Replacement

With the appropriate tools, the V2000 cartridge can be replaced while under pressure.

WARNING

Severe Scalding Hazard.

Contact with hot liquid can lead to severe injury or cause death.

For a pressurized valve, only open with Valve Cartridge Replacement Tool.

CAUTION

Hot Surface Hazard.

Contact with hot valve body can cause severe burning.

Service cartridge only when valve body is cool.

CAUTION

Hazardous Splashing Fluids.

Can injure, burn, or blind.

Wear safety glasses or goggles.

Under Pressure

Replacing the V100 Cartridge with the system under pressure requires the Valve Cartridge Replacement Tool (see Accessories in the Specifications section). See Pressurized Valve Cartridge Replacement section for details.

Not Under Pressure

Replacing the cartridge without the Valve Cartridge Replacement Tool requires one of the following:

•Isolation of valve from system pressure.

•System shutdown and drain to valve level. Once the valve is not pressurized:

1.Using a 3/4 in. (19 mm) hex (6- or 12-point) socket wrench, remove and discard the cartridge.

2.Clean the inside of valve and cartridge sealing surfaces. Install a new cartridge.

CAUTION

Boiler Flooding Hazard.

Loss of system control and boiler damage can result.

For a one-pipe steam system radiator, install valve only at the vent location.

IMPORTANT

Ensure vacuum breakers are installed on the steam system risers. If vacuum breakers (that open to the atmosphere at zero psig) are not installed, the system can develop a negative pressure and pull steam back into the radiators on resumption of steam.

Refer to Fig. 12 for installing the one-pipe steam radiator adapter assembly.

Single-Pipe Steam Systems

T100/V2043H (with vent) operation to provide temperature control for a formerly uncontrolled single-pipe steam system follows:

1.The boiler is off (zero steam pressure); radiators are filled with air; the vent is open.

2.The T100 calls for heat, opening the valve.

3.At the command of an external controller (such as a representative zone thermostat, or a timer controlled by outside temperature) the boiler cycles on and begins delivering steam to the system.

4.Steam enters the radiator, forcing air through the open V2042H and out through the vent.

5.Once the air is exhausted, the steam heats the thermostatic element of the vent, causing it to close.

6.The steam cools forming condensation. Condensation flows out of the radiator making room for more steam to enter.

7.The T100 is eventually satisfied (temperature equals the setpoint) and it closes the V2042H.

8.The air in the system (introduced by the vacuum breakers) begins to fill the radiator. The air in the radiator prevents steam from coming in and the radiator cools.

9.The boiler cycles off by command of components external to the T100/V2042H and the steam pressure returns to zero.

62-3048—2

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