Honeywell Y100P Radiator Valve One Pipe Steam Systems Instruction Manual

: June 17, 2024
: Honeywell

Table of Contents

Honeywell Y100P Radiator Valve One Pipe Steam Systems
FAQ
DESCRIPTION
SPECIFICATIONS
INSTALLATION INSTRUCTIONS
OPERATION
INSTALLATION
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

Honeywell Y100P Radiator Valve One Pipe Steam Systems

Specifications

Valve:

Maximum Pressure: 15 psi (103 kPa)
Size: 1/8 in. angle body only

SA123A Steam/Air Vent:

Vent Port: 1/16 in.
Maximum Operating Pressure: 6 psi (41 kPa)
Height: 3-3/4 in.

Installation Instructions

Step 1: Install V100P Radiator Valves on the vent connection tapping of a radiator or convector. Use thread sealant on all connections.

Step 2: Remove old steam/air vent from radiator or convector.

Step 3: Screw in 1/8 in. male fitting and V100P Valve. Note that the V100P requires horizontal positioning or use of a controller with a remote sensor.

Step 4: Install steam/air vent into V100P. Make sure to mount the vent vertically.

Step 5: Install T100 series operator using instructions included with the unit.

Step 6: Set control to desired setpoint. The valve will automatically control steam flow to maintain temperature.

Operation

The V100P Radiator Valve works in conjunction with an SA123A (or equivalent) steam/air vent. During a call for heat, the valve opens, allowing air to vent from the radiator. This, in turn, allows steam to flow into the radiator. When the space temperature reaches the setpoint, the valve closes, preventing air from venting. When the valve is closed, the radiator cools. The control has a modulating rather than an on/off action to minimize room temperature changes.

FAQ

Q: What is the maximum pressure for the valve?
- A: The maximum pressure for the valve is 15 psi (103 kPa).
Q: What is the size of the valve?
- A: The valve is a 1/8 in. angle body only.
Q: What is the maximum operating pressure for the SA123A steam/air vent?
- A: The maximum operating pressure for the SA123A steam/air vent is 6 psi (41 kPa).
Q: How should I mount the steam/air vent?
- A: The steam/air vent should be mounted vertically.

DESCRIPTION

The V100P Radiator Valve is designed to automatically control temperatures of one-pipe low pressure steam radiators, convectors, or other heating units. Install the V100P Radiator Valve with a T100 Thermostatic Control and an SA123A (or equivalent) steam/air vent (see Fig. 1). The Y100P includes the V100P Valve and the SA123A Steam/Air Vent. V100P Radiator Valves are cast bronze, with nickel plating. The working parts are designed as an easily replaceable cartridge. A resilient seat disk provides positive shut-off.

SPECIFICATIONS

Valve

Maximum Temperature:
- 248°F (120°C).
Maximum Pressure:
- 15 psi (103 kPa).
Size:
- 1/8 in. angle body only.

SA123A Steam/Air Vent

Vent Port:
- 1/16 in.
Maximum Operating Pressure:
- 6 psi (41 kPa).
Height:
- 3-3/4 in.

INSTALLATION INSTRUCTIONS

OPERATION

The V100P Radiator Valve works in conjunction with a SA123A (or equivalent) steam/air vent (see Fig. 1). During a call for heat, the valve opens, allowing air to vent from the radiator. This, in turn, allows steam to flow into the radiator. When the space temperature reaches the set point, the valve closes, preventing air from venting. When the valve is closed, the radiator cools. The control has a modulating rather than an on/off action to minimize room temperature changes.

The V100P is only one component of a one-pipe steam conversion. Full conversion requires additional components. For proper temperature control, Honeywell recommends the following system modifications in addition to the V100P:

A boiler interval timer to provide proper boiler cycling.
Vacuum breakers on the supply piping, or on the individual radiators to allow air to enter during the boiler off cycles. Air entry is required to ensure optimum control.

INSTALLATION

Install V100P Radiator Valves on the vent connection tapping of a radiator or convector. Use thread sealant on all connections.

Remove the old steam/air vent from the radiator or convector.
Screw in 1/8 in. male fitting and V100P Valve. NOTE: The V100P requires horizontal positioning or the use of a controller with a remote sensor.
Install steam/air vent into V100P.
IMPORTANT
Mount the vent vertically.
Install the T100 series operator using the instructions included with the unit.
Set control to the desired setpoint. The valve automatically controls steam flow to maintain temperature.

CHECKOUT

If the radiator fails to heat:

Check that the boiler interval timer is installed and operating.
Check that the vacuum breakers are installed and operating.
Check for proper venting of air:
- a. Turn control setpoint to the highest number.
- b. If no air is released, turn the control setpoint to a minimum and remove the vent.
- c. Check for adequate pressure by slowly turning the control toward maximum. Steam flow through the vent port verifies adequate pressure. Turn setpoint to a minimum.
- d. If steam flows through the vent port, repair or replace the vent.
- e. If steam does not flow through the vent port, check for blockage in the valve body, cartridge and piping.

NOTE: See Controller Installation Instructions for additional troubleshooting procedures.

Home and Building Control Honeywell Inc. Honeywell Plaza P.O. Box 524 Minneapolis, MN 55408-0524
Home and Building Control Honeywell Limited-Honeywell Limitée 155 Gordon Baker Road North York, Ontario M2H 3N7

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