Lochinvar VAL30000 User Manual

Non-Condensing Boiler Protection
for Low Temperature Systems

Ideal for use with Copper-Fin, Copper-Fin II,
Power-Fin and Solution Boilers

When designing a boiler system with return water
temperatures below 140°F it is necessary to
protect the boiler from flue gas condensation.
All non-condensing boilers will develop operational
problems if they are continually exposed to system return water
temperatures below 140°F. Typical systems that require this
protection are water source heat pump systems,in-floor radiant
heat systems, greenhouse heating, soil heating, process operations
and manufacturing operations. Aditionally, heating systems that utilize
nighttime setback, night/weekend shutdown or outdoor reset control
strategies should incorporate low water temperature protection.

LTV
Low Temperature
Valves

To prevent low return water temperatures to the boiler and
combat operational problems, the system should be piped
in a primary secondary piping arrangement with a low
temperature bypass. Manual bypass systems however are
not the ideal solution due to varying flow rates and firing
rate of the boiler. A better alternative is Lochinvar’s Low
Temperature Valve, which is a self-contained automatic
thermostatic 3-way valve that ensures temperatures entering
the boiler remain above 140°F.

The Lochinvar LTV Low Temperature Valve is
shipped separately and can easily be incorporated
into the field installed primary/secondary boiler
piping. (2” LTV Valve shown installed on CHN751)

Standard Features

• Low Return Water Temperature Boiler Protection

• Non-Adjustable and Automatic

• Heavy Duty Construction

• Replaceable Thermostatic Element(s)

How it Works

The LTV Valve “modulates” to maintain 140°F as a minimum return temperature to the boiler.

- Hot water from the boiler enters
“B” port.

- Cooler water from the system
enters “C” port.

- “B” and “C” water mix to meet
the desired 140°F.

- Water exits “A” port back to
the boiler return.

1-1/2” LTV Valve

2” LTV Valve

2-1/2” LTV Valve

LTV Valve Dimensions & Spec i fi ca tions

1-1/2” LTV ValveU

Up to 55 GPM flow rate

Part Number - VAL30000

2” LTV Valve

Up to 55 GPM flow rate

Part Number - VAL3048

TYPICAL PIPING

All boilers must use optional remote sensor.
Minimum high limit setting is 205°F.
Pump supplied by installer.

2-1/2” LTV Valve

Over 55 GPM flow rate

Part Number - VAL3047

Note: Mounting flange Included with valves.

2-1/2” LTV Valve

Lochinvar Corporation • 300 Maddox Simpson Pkwy • Lebanon, TN 37090 • 615-889-8900 / Fax: [phone]

LTV-05 (Replaces LTV-04 6/08)

2” LTV Valve

1-1/2” LTV Valve

2-1/2” LTV Valve

www.Lochinvar.com

PDP-5M-4/11-Printed in U.S.A.