Watts 1450F - Manuel

Feed Water Pressure Regulators
Series 1450F, T-1450F, S-1450F and T145B
Installation
1. The Watts Feed Water Pressure Regulator must be installed on
the cold water supply line to the boiler. It must be installed in a
horizontal position. Allow sufficient clearance to operate the fast
fill and purge lever.
2. Install a shutoff valve upstream of the regulator.
Note: local codes typically require the use of a backflow preven-
ter in the system (Watts Model 9D). Consult local authorities for
the type, installation and testing requirements. The backflow pre-
venter must be installed upstream of the regulator.
3. Prior to installing the regulator flush out the supply pipe to clear it
of chips, scale dirt, etc.
4. Install the Watts regulator in the supply line to the boiler with the
arrow on the valve body pointing in the direction of flow to the
boiler.
5. Connect a pipe from the “DRAIN” tapping in the relief valve to a
convenient open drain such as a floor drain or set tub in order to
avoid water damage or scalding when valve operates.
IMPORTANT! Do not install a valve of any kind in this line. This
drain must always pitch down from the regulator. No portion of the
drain line should be above the regulator. Drain pipe must not be
smaller than the drain tapping provided. The relief valve is nonadjust-
able and set to relieve at 30psi. Test lever must be manually oper-
ated at least once a year to insure that waterways are clear.
Operation
1. To fill the system, open the shutoff valve upstream of the regulator.
This valve must always be kept open when the system is in opera-
tion. Water will flow into the system until it is full and under pres-
sure.
Note: Series with Fast Fill and Purge Lever
1 ⁄
2
" valves are equipped with a unique and simple “fast fill and
purge lever” . . . which permits rapid filling of the system . . . and
sustained flow for air purging.
When the lever is raised to the vertical position it pushes a
removable “Push Rod” down. This manually forces the valve to
a wide open position for maximum flow. Returning the lever to
its normal position releases the tension on the rod permitting
the valve to maintain normal system pressure. Caution: Always
observe the Boiler Pressure Gauge when using this feature.
Using this feature with the Purge Valve closed can result
in over pressurizing the system or exceeding the Pressure
Safety Relief Valve setting. Over pressurization can result in
a water discharge from the Relief Valve. This feature can be
disabled to prevent tampering or accidental misuse of the fast fill
feature by simply unscrewing the fast fill lever cap and removing
the push rod.
IMPORTANT
The installation of a separate Feed Water Pressure Regulator and
an ASME Pressure Safety Relief Valve Nos. 174A or 740 pro-
vides the dual service accomplished by a dual control Hot Water
Heating Regulator and, in addition conforms to the ASME require-
ments for low pressure heating boilers. (State and local regula-
tions are based on ASME boiler codes). Where local or state
codes are in effect, installations must be in compliance. (see
reverse side for servicing and important information)
Installation Diagram
to
Expansion Tank
to Radiation
Hot Water
Boiler
Return
Cold
Water
Drain
Shutoff
Valve
Relief Valve
Feed Water
Pressure
Regulator
No. 9D
Backflow
Preventer
2. The regulator is set to deliver water to the boiler at approximately
15 psi pressure. This pressure is sufficient for a 3 story building.
To reset the reducing valve for higher pressure (when the pres-
sure is not sufficient to lift the water to highest radiation):
A. Calculate the number of feet from the regulator to the top of
highest radiation.
B. Multiply this number by 0.43 and add 3 psi. This will give the
pressure required to raise the water to the highest radiator and
keep the system under pressure.
3. To reset the regulator valve: Remove the fast fill lever cap, and
loosen the lock nut. To raise the reduced pressure slowly turn
the adjusting screw clockwise until the system gauge indicates
the pressure required. To lower the reduced pressure turn the
adjusting screw counterclockwise. After completing adjustments
tighten the lock nut and replace the fast fill lever cap.
IMPORTANT
Annual inspection of all water system safety and control valves is
required and necessary. Regular inspection, testing and cleaning
assures maximum life and proper product function.
IS-145/1450