Honeywell MV100 User Manual

9

62-3048—2

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.

NOTE: When temperature of medium exceeds 190°F (88°C), 

mount the MV100 horizontally.

Wire the MV100 according to Fig. 18.

Disconnect all power supplies before installation.

Connect only 24 Vac or 24 Vdc to the MV100.

The T100 and MV100 Controllers contain temperature-

sensitive capsules that expand or contract in reaction to 

temperature changes.

— 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.

The T100 temperature-sensitive capsule expands when the 

temperature rises above the setpoint.

When signalled by the thermostat, an electric element in the 

MV100 heats the capsule causing it to expand.

NOTE: For normally open MV100 models, the capsule cools 

when signalled by the thermostat.

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.

M16272A

L1 

(HOT)
L2

PTC

RESISTANCE

HEATER

YELLOW

T810/T822

YELLOW

1

1

2

3

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD 

PROTECTION AS REQUIRED.

NORMALLY OPEN END SWITCH CLOSES WHEN MV100 IS POWERED.

SUGGESTED HEAT ANTICIPATOR SETTING IS 0.35A.

3

2

RED

END

SWITCH

RED

TO CIRCULATOR

PUMP MULTIZONE 

PANEL OR BURNER 

RELAY

M12947A