Honeywell V2000 Thermostat User Manual

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MV100 Electric Controllers  
T100, T200 Thermostatic Controllers  
and V2000 Radiator Valves  
PRODUCT DATA  
APPLICATION  
THERMOSTATIC CONTROLS  
The MV100, T100, T200 Controllers, when paired with V2000  
Radiator Valves, provide automatic temperature control by  
modulating the flow of steam or hot water through free-  
standing radiators, convectors, and other heating units. They  
provide comfort and energy savings at affordable prices.  
T100  
T100M  
FEATURES  
Continually monitors and adjusts room temperature  
for consistent comfort and relief from underheating  
and overheating.  
T100C  
T100F  
T100,T200 Controllers include sensor, setpoint dial  
and valve actuator; components can be integral or  
connected by capillary tubing.  
T200  
T100B  
T100,T200 Controllers require no electrical  
connections.  
T100A,F,M models have range limiting features to limit  
adjustment or lock at a fixed setting (can require limit  
pin accessory).  
MV100  
EPDM valve seat disk assures tight shutoff on steam  
and hot water systems.  
VALVE BODIES  
Nickel-plated bronze cast valve body.  
Cartridge containing all working parts inserts into  
valve body for ease of service.  
Cartridges are replaceable while valves remain in  
service and under pressurE (WITH accessory service  
tool MT100C).  
V2043H  
Valves remain normally open with no control mounted.  
Valves can be used with T100, T200 Thermostatic or  
MV100 Electric Controllers.  
Contents  
V2040A  
Application ........................................................................  
Features ...........................................................................  
Specifications ...................................................................  
Ordering Information ........................................................  
Installation ........................................................................  
Wiring (MV100 only) .........................................................  
Operation ..........................................................................  
Settings and Adjustments .................................................  
1
1
2
2
5
9
9
9
V2040D  
V2040E  
V200LD  
Single-Pipe Steam Applications ....................................... 10  
Troubleshooting ................................................................ 12  
Pressurized Valve Cartridge Replacement ....................... 13  
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MV100 ELECTRIC CONTROLLERS T100, T200 THERMOSTATIC CONTROLLERS AND V2000 RADIATOR VALVES  
SPECIFICATIONS  
Materials:  
MV100 Electric Controller  
Body: Industrial grade plastic with low thermal conductivity.  
Fastening Ring: Plated brass.  
Internal Parts: Brass thermostat capsule, other metals.  
Dimensions: See Fig. 1.  
Thermal Element:  
Materials:  
T100A,M: Wax.  
Body: Industrial grade plastics with low thermal conductivity.  
T200,T100B,C,F: Liquid Ethyl Acetate (non-toxic,  
Fastening Ring: Plated brass.  
flammable).  
Internal Parts: Brass thermostat capsule, other metals.  
Thermal element: Wax-filled brass capsule.  
Temperature Ratings:  
Range: 43°F to 79°F (6°C to 26°C).  
Maximum: 125¼F (52¼C).  
Electrical Ratings:  
Control Type: Spst switch.  
Controller:  
Voltage: 24 Vac, 60 Hz, or 24 Vdc.  
Power Consumption: 0.125A, 3W.  
V2000 Valves  
End Switch: Low-voltage (24 Vac, 5A), two-position, spst,  
normally open switch (closes when controller powered).  
Models: See Table 2.  
Dimensions: See Fig. 2 and 3.  
Configuration (with Controller Mounted):  
Normally closed (valve remains closed without power).  
Materials:  
Body: Bronze.  
V2040A (1/2 in.): Brass.  
Union: Brass.  
Stem Seal: Double EPDM seal.  
Cartridge: Brass and stainless steel with EPDM seat disk.  
NOTE: Normally open model available in Canada.  
Opening Time (at 78°F): Maximum: 5 minutes from cold to  
fully open.  
Ambient Temperature Rating: Maximum: 122°F (50°C).  
NOTE: Apply 25 ft.-lb. (30 N•m) torque when installing the  
valve cartridge.  
T100,T200 Thermostatic Controllers  
Maximum Temperature Rating: 266°F (130°C).  
Models: See Table 1.  
Maximum Pressure Ratings:  
System:  
Dimensions: See Fig. 1.  
Water: 145 psi (10 bar).  
Steam: 15 psi (103 kPa).  
Differential:  
Power: Self-powered, no electrical connections.  
Components: Sensor, setpoint dial and valve actuator.  
With MV100 Controller: 36 psi (248 kPa).  
With T100 or T200 Controller: 14.5 psi (1 bar).  
For Low Noise: 2.9 psi (20 kPa).  
Sizes:  
V2024H: 1/8 in.  
V200LD: 1/2 in., 3/4 in.  
V2040D,E,A: 1/2 in., 3/4 in., and 1 in.  
ORDERING INFORMATION  
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the  
TRADELINE® Catalog or price sheets for complete ordering number.  
If you have additional questions, need further information, or would like to comment on our products or services, please write or  
phone:  
1
.
Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory).  
Honeywell Customer Care  
2.  
1
885 Douglas Drive North  
Minneapolis, Minnesota 55422-4386  
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9.  
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,  
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.  
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2
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MV100 ELECTRIC CONTROLLERS T100, T200 THERMOSTATIC CONTROLLERS AND V2000 RADIATOR VALVES  
T100A  
TOP  
T100M  
TOP  
2
(
50)  
2
(
50)  
T100C  
1
(25)  
2
-1/8 (54)  
CAPILLARY TUBE LENGTH  
-1/2 FT (1.4 m)  
2
-1/8 (54)  
4
1
-13/16  
(46)  
2
-5/32  
55)  
(
3
(
77)  
3
-5/16  
84)  
MAX.  
(
2-31/32 (75)  
CAPILLARY TUBE  
LENGTH 4-1/2 FT (1.4 m)  
M12927  
M12929  
M12925A  
T100B  
T100F  
2-1/8 (54)  
2 (50)  
CAPILLARY TUBE LENGTH  
-1/2 FT (2m) OR 16 FT. (5m)  
2
-1/8 (54)  
6
CAPILLARY TUBE  
LENGTH 6-1/2 FT (2 m)  
1
-13/16  
(46)  
3
-5/16  
84)  
MAX.  
2
-5/32  
55)  
(
(
2
-31/32 (75)  
M12928  
M12926  
T200A  
TOP  
MV100  
2
(51)  
1
-9/16  
40)  
(
2
-7/8  
1
3/16 (20)  
(74)  
M3187A  
3
76)  
(
MAX  
M12945  
Fig. 1. MV100, T100 and T200 dimensions in in. (mm).  
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MV100 ELECTRIC CONTROLLERS T100, T200 THERMOSTATIC CONTROLLERS AND V2000 RADIATOR VALVES  
Table 1. T100,T200 Models.  
Model  
T100A  
Control Range  
Mounting  
Capillary  
None  
Description  
Components are in one unit.  
43°F to 79°F  
Directa  
(
6°C to 26°C)  
48°F to 79°F  
9°C to 26°C)  
T100B  
T100C  
T100F  
Remote  
Remote  
One 6-1/2 ft (2 m) Sensor and setpoint dial combined and remote from valve  
or 16 ft (5 m) actuator.  
Two 4-1/2 ft  
(
Components mount remotely from each other.  
(1.4 m)  
43°F to 79°F  
6°C to 26°C)  
Direct with  
remote  
One 6-1/2 ft (2 m) Sensor is remote from combination setpoint dial and valve  
actuator.  
(
sensor.  
T100M  
T200A  
Directa  
Directa  
None  
None  
Components are in one tamper-resistant unit.  
White body with chrome-plated end.  
a
Mount the unit horizontally on the valve body for accurate temperature regulation.  
Table 2. V2000 Models.  
Connection  
Model  
V2040D  
V2040E  
V2040A  
V200LD  
Body Pattern  
Straight  
Inlet  
Outlet  
Application  
NPT  
Union Nut with Use where manual valves were not originally installed.  
NPT Threaded  
or Sweat  
Threaded  
Sweat  
Angle  
Typically used with remote temperature sensing controllers.  
Horizontal Angle  
Straight  
Typically used with direct-mount controllers (T100A,M; T200A)  
Sweat  
Use with copper tubing installations.  
V2042H/  
V2043H  
One-Pipe  
18 in. NPT 1/8 in NPT for Use in single-pipe steam applications.  
SA123A Vent  
V2040D (Straight Body)  
V2040E (Angle Body)  
B MAX.  
B MAX.  
C
A
M12930B  
V2040A (Horizontal Angle Body)  
A
M12931B  
V200LD (Straight Body)  
C
B MAX.  
B MAX.  
A
M12932B  
M12933B  
A
Fig. 2. V2000 dimensions.  
NOTE: Refer to Table 3 for detailed valve dimensions for each valve size.  
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MV100 ELECTRIC CONTROLLERS T100, T200 THERMOSTATIC CONTROLLERS AND V2000 RADIATOR VALVES  
Table 3. Valve Dimensions.  
Sizein  
in.  
A
B Maxa  
in in. (mm) in in. (mm) in in. (mm)  
C
Valve  
V2040D 1/2  
3-3/4 (95) 4-1/16 (104) —  
4-3/16 (106) 4-1/16 (104) —  
4-1/2 (114) 4-1/2 (114)  
2-5/16 (58) 3-3/16 (98) 1 (26)  
2-5/8 (66) 3-13/16 (98) 1-1/8 (29)  
2-15/16 (74) 4-5/16 (110) 1-5/16 (34)  
3/4  
1
V2040E 1/2  
3/4  
B MAX.  
A
1
V2040A 1/2  
2-1/8 (54)  
2-1/2 (64)  
4-1/2 (115) 1-1/8 (28)  
5-3/16 (132) 1-3/16 (31)  
C
3/4  
1
2-15/16 (74) 5-3/16 (132) 1-7/16 (37)  
2-5/8 (66) 4-1/16 (104) —  
V200LD 1/2  
/4  
V2042H 3/8  
M17016  
3
2-15/16 (74) 4-1/16 (104) —  
Fig. 3. V2042H (Body)/V2043H (Body with Airstream Vent)  
Dimensions.  
1-11/16 (43) 3-13/16 (98) 1-3/16 (31)  
aB Max dimension is with T100A control installed, except for  
the V2042H, for which it is without the steam/air vent  
installed.  
NOTE: Refer to Table 3 for detailed valve dimensions for  
each valve size.  
Connections:  
Inlets Available:  
INSTALLATION  
Internally threaded.  
Sweat (1/2 in. and 3/4 in. only).  
Outlets Available:  
When Installing this Product...  
Union nut with threaded tailpiece.  
Sweat (1/2 in. and 3/4 in. only).  
Union nut with sweat tailpiece (1/2 in. and 3/4 in. only).  
1. Read these instructions carefully. Failure to follow them  
could damage the product or cause a hazardous  
condition.  
2.  
Check the ratings given in the instructions and on the  
product to make sure the product is suitable for your  
application.  
Capacity:  
Cv (gpm at 1 psi drop across fully-open valve):  
1
3
1
/2 in.: 2.0.  
/4 in.: 2.2.  
in.: 2.3.  
3. Installer must be a trained, experienced service  
technician.  
4. After installation is complete, check out product  
Btuh (Btu/hr at 7 psi drop across fully-open valve):  
operation as provided in these instructions.  
1
3
1
/2 in.: 59,100.  
/4 in.: 63,800.  
in.: 70,500.  
CAUTION  
Excessive force can distort and damage valve.  
Do not overtighten the union nut.  
Equipment Damage Hazard.  
Accessories:  
2
2
2
03225 Replacement Bulb Guard for T100F.  
72844 Locking Cap and Limit Pins for T100M.  
72873 MT100C Cartridge Tool Driver Upgrade Kit.  
A104F Limit Pins for T100A,F.  
VS1200SL01 Replacement Valve Cartridge.  
G111B Bulb Guard to protect T100C sensor when  
wall-mounted.  
VA8200A001 Valve Cartridge Replacement Tool for system  
under pressure (V2000).  
Q110D Inlet Strainer Inserts for NPT V100 (models available  
for 1/2 in. and 3/4 in. valves).  
CAUTION  
Equipment Damage Hazard.  
Driving an unmounted MV100 can damage the  
actuator beyond repair.  
Mount the MV100 before applying power to the  
actuator.  
SA123A Steam/Air Vent for V2042HSL10 One-pipe Steam  
Valve.  
CAUTION  
Sweat Valve Damage Hazard.  
Soldering the valve with the cartridge or controller  
attached can damage the device.  
Prior to attaching valve to piping, remove controller and  
cartridge from potential exposure to heat.  
IMPORTANT  
When installing the valve body, ensure that the arrow  
(cast into the body) points in the direction of the flow.  
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MV100 ELECTRIC CONTROLLERS T100, T200 THERMOSTATIC CONTROLLERS AND V2000 RADIATOR VALVES  
One complete revolution of the black pre-setting ring equals a  
pre-setting of 10 (Fig. 7).  
Pre-setting and Balancing Flow Through  
Valve Body.  
Close valve with straight blade screwdriver by turning black  
pre-setting ring clockwise.  
M22690  
Fig. 7. One complete revolution equals a pre-setting of 10.  
Table 4. CV Values.  
Pre-  
setting  
M22687  
1
2
3
4
5
6
7
Open  
Fig. 4. Closing valve.  
3/8 in.  
0.29 0.58 0.87  
1.16 1.45 1.68 1.80 2.00  
1
/2 in.  
2.15  
2.26  
When closed, the position of the screwdriver slot equals pre-  
setting zero. Mark the position of the slot with a felt tip pen.  
3
1
/4 in.,  
in.  
NOTE: Pressure drop (psi) = (flow[gpm]/cv)2.  
Product Selection  
1.  
Select the installation diagram (from Fig. 4 through 16)  
that most accurately represents your equipment and pip-  
ing configuration.  
2.  
Use Table 4 to select the combination of controller and  
valve that is most suitable based on:  
M22688  
a. Equipment and pipe configuration, see Tables 1 and  
2.  
b. Flow capacity requirement, see Specifications  
Fig. 5. Mark zero position of screwdriver slot.  
section.  
Take required value from Table 4. Turn presetting ring  
counterclockwise with a straight blade screwdriver to this  
position.  
IMPORTANT  
The T100 and T200 are modulating, not manual shut-  
down, valve actuators. Do not use them for hand  
shutoff valves.  
Chose value has to be congruent with marking.  
M22689  
Fig. 6. Set pre-setting ring to correct value.  
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MV100 ELECTRIC CONTROLLERS T100, T200 THERMOSTATIC CONTROLLERS AND V2000 RADIATOR VALVES  
Typical Applications  
Table 5. Figure References to Typical Applications.  
Application  
Figure No.  
Controller  
Valve  
8
9
1
T100A, T100M, T200, MV100 V2040D  
T100A, T100M, T200, MV100 V2040A  
T100A, T100M, T200, MV100 V2040E  
T100A, T100M, T200, MV100 V2042H  
0
11  
M12934  
12  
13  
14  
15  
16  
17  
18  
19  
20  
T100M, MV100  
T100F, MV100  
T100F, MV100  
T100F, MV100  
T100F, MV100  
T100B, MV100  
T100B, MV100  
T100C, MV100  
T100C, MV100  
V2040A  
V2040E  
V200LD  
V2040D  
V2042H  
V2040D  
V2040E  
V2040D  
V200LD  
Fig. 10.  
M3236  
Fig. 11. One-pipe steam system.  
M4631  
Fig. 8.  
M12935  
Fig. 12.  
M4632  
Fig. 9.  
M4635  
Fig. 13.  
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MV100 ELECTRIC CONTROLLERS T100, T200 THERMOSTATIC CONTROLLERS AND V2000 RADIATOR VALVES  
M4640  
M3190  
Fig. 14.  
Fig. 18.  
Fig. 19.  
Fig. 20.  
M4638  
M12936A  
Fig. 15.  
SA123A  
V2042H  
T100A  
M12939  
M11752A  
Location and Mounting  
Fig. 16.  
Because these controls are thermostats that have sensors that  
measure air temperature in the immediate vicinity, it is critical  
to select an appropriate installation location.  
These devices are adversely affected by radiant heat, solar  
heat or airflow obstructions such as curtains or enclosures.  
Two essential considerations for choosing the correct  
controller/valve body combination for a particular installation  
are:  
Adequate dimensional clearances.  
Proper sensor positioning.  
M12937  
IMPORTANT  
Install built-in sensor type controllers in a horizontal  
Fig. 17.  
position to prevent air warmed by the hot valve body  
from influencing the sensor.  
NOTE: The most common misapplication of these valves and  
controllers is the use of a horizontal-body valve  
(
V2040E) with a direct-mount controller (T100A,M or  
T200A). See Fig. 17.  
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MV100 ELECTRIC CONTROLLERS T100, T200 THERMOSTATIC CONTROLLERS AND V2000 RADIATOR VALVES  
MV100  
END  
SWITCH  
RED  
TO CIRCULATOR  
PUMP MULTIZONE  
RED  
2
PANEL OR BURNER  
RELAY  
PTC  
RESISTANCE  
HEATER  
YELLOW  
YELLOW  
L1  
(HOT)  
L2  
1
3
T810/T822  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD  
PROTECTION AS REQUIRED.  
CORRECT  
M16272A  
2
3
NORMALLY OPEN END SWITCH CLOSES WHEN MV100 IS POWERED.  
INCORRECT  
SUGGESTED HEAT ANTICIPATOR SETTING IS 0.35A.  
M12947A  
Fig. 21. Horizontal-body V2000 application.  
Fig. 22. MV100 internal schematic and wiring connections.  
Install controllers with external sensors in any position. The  
sensor can easily be mounted in a position to measure and  
control the room air temperature.  
OPERATION  
NOTE: When temperature of medium exceeds 190°F (88°C),  
mount the MV100 horizontally.  
The T100 and MV100 Controllers contain temperature-  
sensitive capsules that expand or contract in reaction to  
temperature changes.  
WIRING (MV100 ONLY)  
When the capsule expands, pressure from the expand-  
ing material closes the valve, preventing flow through  
the radiation unit.  
When the capsule contracts, the valve opens and flow  
resumes through the radiation unit.  
Wire the MV100 according to Fig. 18.  
CAUTION  
Can short equipment circuitry.  
Disconnect all power supplies before installation.  
T100  
Equipment Damage Hazard.  
The T100 temperature-sensitive capsule expands when the  
temperature rises above the setpoint.  
MV100  
CAUTION  
Connecting improper voltage can damage the  
device beyond repair.  
When signalled by the thermostat, an electric element in the  
MV100 heats the capsule causing it to expand.  
Equipment Damage Hazard.  
NOTE: For normally open MV100 models, the capsule cools  
when signalled by the thermostat.  
Connect only 24 Vac or 24 Vdc to the MV100.  
SETTINGS AND ADJUSTMENTS  
When installation is complete, rotate the setpoint dial to the  
desired setting.  
NOTE: The setpoint varies with the location of the sensor. A  
floor level sensor controls at a setpoint different from  
the wall level sensor.  
Normally, correction of an overheating or underheating  
condition requires only small changes. See Table 5 for dial  
markings and corresponding temperature settings. After  
changing the setting, allow the valve at least 30 minutes to  
stabilize.  
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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
54 (12)  
64 (18)  
3
61 (16)  
68 (20)  
4
68 (20)  
72 (22)  
5
73 (23)  
75 (24)  
6
T100A,F  
T100B,C  
32 (0)  
43 (6)  
46 (8)  
79 (26)  
55 (13)  
43 (6)  
43 (6)  
61 (16)  
61 (16)  
52 (11)  
9 (26)a  
7
T100M  
T200  
64 (18)  
57 (14)  
68 (20)  
63 (17)  
72 (22)  
68 (20)  
5 (24)a  
79 (26)a  
7
73 (23)  
79 (26)  
a
Setting not marked on dial.  
NOTE: Torque cartridge to 25 ft-lb.  
Setpoint Locking or Limiting  
SINGLE-PIPE STEAM APPLICATIONS  
(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.  
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  
CAUTION  
Loss of system control and boiler damage can  
With the appropriate tools, the V2000 cartridge can be  
replaced while under pressure.  
Boiler Flooding Hazard.  
result.  
For a one-pipe steam system radiator, install valve only  
at the vent location.  
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.  
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.  
CAUTION  
Contact with hot valve body can cause  
Refer to Fig. 12 for installing the one-pipe steam radiator  
adapter assembly.  
Hot Surface Hazard.  
severe burning.  
Service cartridge only when valve body is cool.  
Single-Pipe Steam Systems  
T100/V2043H (with vent) operation to provide temperature  
control for a formerly uncontrolled single-pipe steam system  
follows:  
CAUTION  
Hazardous Splashing Fluids.  
Can injure, burn, or blind.  
Wear safety glasses or goggles.  
1.  
The boiler is off (zero steam pressure); radiators are  
filled with air; the vent is open.  
2
3
.
.
The T100 calls for heat, opening the valve.  
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.  
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.  
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.  
The steam cools forming condensation. Condensation  
flows out of the radiator making room for more steam to  
enter.  
Not Under Pressure  
Replacing the cartridge without the Valve Cartridge  
Replacement Tool requires one of the following:  
6
7
.
.
The T100 is eventually satisfied (temperature equals the  
setpoint) and it closes the V2042H.  
Isolation of valve from system pressure.  
System shutdown and drain to valve level.  
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.  
The boiler cycles off by command of components  
external to the T100/V2042H and the steam pressure  
returns to zero.  
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.  
Clean the inside of valve and cartridge sealing surfaces.  
Install a new cartridge.  
9.  
2
6
2-3048—2  
10  
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MV100 ELECTRIC CONTROLLERS T100, T200 THERMOSTATIC CONTROLLERS AND V2000 RADIATOR VALVES  
NOTE:  
NOTE: Install the valve on the boiler side of the condensation  
takeoff to ensure that the condensation can return to  
While the T100 is satisfied, the V2042H is closed  
and the radiator remains airlocked. Thus, no  
steam can enter the radiator. The airlocked  
condition remains until the T100 calls for heat, at  
which point the system operates as described in  
steps 1 through 6.  
An improperly cycled boiler causes either  
excessive heating or lack of heat, depending on  
the system time constant.  
the boiler.  
3. Verify that the steam pressure has returned to zero.  
Verification  
Verification is necessary to prove that the pressure has  
returned to zero. Simply turning off the boiler or shutting off the  
steam supply does not ensure zero steam pressure. The  
simplest way to check for zero pressure follows:  
Bringing the Steam Pressure to Zero psig  
1
.
Install a strap-on Aquastat® Controller, such as the  
Honeywell L6006C Aquastat® Controller, on the  
condensation return line (see Fig. 19).  
To assure the proper operation of any single-pipe steam  
system, ensure that the steam pressure is brought to zero at  
some time during the off-cycle. One suggested procedure  
follows:  
2. Set the Aquastat® Controller at about 150°F (66°C).  
With the return line at or below this temperature, the  
water is all condensation, and the pressure is  
functionally zero.  
3. Wire the Aquastat Controller into the interrupting circuit  
to ensure that steam flow cannot resume until the  
condensation line is below the setpoint. The 150°F  
(66¡C) setpoint serves as a nominal starting point and  
can require adjustment for individual steam systems.  
1.  
Determine if steam is required using one of two  
methods:  
a. A thermostat in a representative zone controls the  
valve or cycles the boiler.  
b. A timing device cycles the boiler for varying lengths  
of time in response to outdoor temperature.  
IMPORTANT  
When cycling the boiler from a space thermostat in a  
MASTER ZONE  
THERMOSTAT  
1
L6006C  
zone, do not apply a radiator valve to that radiator.  
L1  
HOT)  
2
4
(
Vac  
2.  
Turn off the steam and allow system pressure to drop to  
zero. Do this using one of two methods:  
L2  
LOW  
VOLTAGE  
RELAY  
a. Turn the boiler off and allow the total steam pressure  
in the system to drop to zero.  
PRIMARY  
CONTROL  
IMPORTANT  
Before applying controls to turn a boiler on and off,  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND  
OVERLOAD PROTECTION AS REQUIRED.  
check the manufacturer recommendations.  
M7536A  
b. In installations where turning the boiler off at the end  
of each cycle is undesirable, install a control valve  
Fig. 23. Holding circuit for use with L6006 when  
verifying zero psig steam pressure.  
(such as a Honeywell V5011 Valve) on the boiler dis-  
charge line.  
11  
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MV100 ELECTRIC CONTROLLERS T100, T200 THERMOSTATIC CONTROLLERS AND V2000 RADIATOR VALVES  
TROUBLESHOOTING  
Refer to Table 6 for troubleshooting details.  
Table 7. T100/V2000 Troubleshooting.  
Symptom  
Possible Cause  
Solution  
Not all sections of the Many radiators are oversized and System is operating properly.  
radiator are heating.  
Underheating  
not all sections heat to maintain  
the desired temperature.  
Sensor in the wrong location.  
Change the sensor location or change the control type. See  
Installation Instructions.  
T100A,M Controller mounted in a Mount the T100A,M horizontally, or switch controller to a T100F.  
vertical position above the hot  
pipe.  
Excess capillary tubing coiled  
above or too close to the heat  
source.  
Coil excess capillary tubing below or away from the heat source.  
Flow through the valve is in the  
wrong direction.  
Check the arrow on the valve body. It should be in the direction of  
the flow. Change the valve direction or flow direction.  
Inadequate system temperature or Check boiler operating and limiting controls, circulating pump, and  
pressure.  
isolating valves.  
Defective steam traps.  
Airlock in the hot water system.  
Scale or debris blocks flow.  
Repair or replace the traps.  
Fully open the valve to allow air to pass. Install vents.  
Flush the system. Do not use oil-based additives. Clean strainer  
insert in steam applications.  
Heating cabinet dampers are  
closed.  
Open or remove the dampers.  
Single-pipe: Blocked vent.  
Sensor in the wrong location.  
Control not properly installed.  
Remove and inspect vent. Replace if necessary.  
Change sensor location or change control type.  
Overheating  
Check for bosses and grooves, reset actuator on valve and tighten  
knurled ring to valve body.  
Capillary tube broken, kinked or  
bent sharply.  
Replace control.  
Dirt or scale under the seat  
prevents tight shutoff.  
Remove the control from the valve body, allowing valve to open  
fully and flush away scale and debris. Reinstall control. Turn fully  
clockwise. If the valve does not close fully, remove the control and  
cartridge (see Cartridge Replacement section). Always use a  
strainer insert in steam applications.  
Flow through the valve is in the  
wrong direction, damaging the  
valve seat.  
Check the arrow on the valve body. It should correspond to the flow  
direction. Change the valve direction or flow direction. Remove  
valve cartridge and inspect seat disk for damage.  
Defective steam traps.  
Repair or replace traps.  
Excessive differential pressure  
Install differential pressure regulator (D146A) to maintain less than  
forces the valve open (hot water 15 psi (103 kPa) differential between the supply and return pipes.  
systems).  
Single-pipe: Insufficient air in  
system.  
Check boiler cycling and system vacuum breakers. Repair or  
replace breakers as necessary.  
Chattering or knocking. Flow through the valve in the  
wrong direction.  
Check the arrow on the valve body. It should correspond to the flow  
direction. Change the valve direction or flow direction.  
Vacuum in the system.  
Excessive differential pressure.  
Bent piping.  
Steam—check traps and vents.  
Hot water—check expansion tank operation and location.  
Install differential pressure regulator (D146A) to maintain less than  
1
5 psi (103 kPa) differential between the supply and return pipes.  
Ensure adequate space for piping.  
6
2-3048—2  
12  
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MV100 ELECTRIC CONTROLLERS T100, T200 THERMOSTATIC CONTROLLERS AND V2000 RADIATOR VALVES  
PRESSURIZED VALVE CARTRIDGE  
REPLACEMENT  
B
The VA8200A001 Valve Cartridge Changing Tool enables the  
user to remove, and clean or replace the valve cartridge while  
the valve remains pressurized. Boiler shutdown is not required.  
D
A
WARNING  
Severe Scalding Hazard.  
Contact with hot liquid can lead to severe injury or  
cause death.  
Exercise extreme caution when working with hot liquid.  
M16273  
C
Fig. 25. Attaching VA8200A001 to valve.  
CAUTION  
Hazardous Splashing Fluids.  
Can injure, burn, or blind.  
Wear eye protection to prevent injury.  
B
To remove the cartridge, perform the following:  
1
.
Remove controller and loosen valve cartridge slightly  
using a 19mm socket wrench (A,B). See Fig. 20.  
Tighten VA8200A Cartridge Changer to valve body  
A
2.  
(
A,B), close drain cock (C), and turn tool handle ccw to  
C
unscrew cartridge (D). See Fig. 21.  
3
.
Pull handle out to clear VA8200A ball valve (A), close  
ball valve (B), and open drain cock to remove excess  
water and steam from chamber (C). See Fig. 22.  
Unscrew end cap (A) and remove cartridge from  
chamber (B). See Fig. 23.  
M16275  
4
.
.
5
Clean or replace cartridge.  
Fig. 26. Disconnecting valve cartridge  
and draining chamber.  
B
A
A
M16274  
B
M16276  
Fig. 24. Loosening valve cartridge.  
Fig. 27. Removing valve cartridge.  
To reinstall cartridge into the valve, use the same process and  
figures. Perform steps in reverse order. All figure arrows are  
backwards (except Fig. 20, arrow A). Proceed as follows:  
1.  
2.  
3.  
Replace cartridge into chamber (B) and screw end cap  
onto VA8200A (A). See Fig. 23.  
Close drain cock (C), open ball valve (B), and push  
handle in (A). See Fig. 22.  
Turn tool handle cw to screw in cartridge (D), open drain  
cock to drain chamber of remaining water and steam (C),  
and loosen VA8200A Cartridge Changer from valve body  
(
B,A). See Fig. 21.  
Tighten valve cartridge using a 19mm socket wrench  
A,B) and replace controller. See Fig. 20.  
4.  
(
13  
62-3048—2  
6
2-3048—2  
14  
15  
62-3048—2  
href="
Automation and Control Solutions  
Honeywell International Inc.  
Honeywell Limited-Honeywell Limitée  
35 Dynamic Drive  
1
985 Douglas Drive North  
Golden Valley, MN 55422  
customer.honeywell.com  
Scarborough, Ontario M1V 4Z9  
®
©
U.S. Registered Trademark  
2006 Honeywell International Inc.  
6
2-3048—2 G.R. Rev. 02-06  

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