Watts T156B Series Manual

Series 1156F, T156B and N256
Feed Water Pressure Regulators
Sizes: ⁄ " – ⁄ "
1 3
2 4
WARNING
!
Read this Manual BEFORE using this equipment.
Failure to read and follow all safety and use infor-
mation can result in death, serious personal injury,
property damage, or damage to the equipment.
Keep this Manual for future reference.
Installation Instructions
1. The Watts Feed Water Pressure Regulator must be
installed on the cold water supply line to the boiler. It may
be installed in either vertical or horizontal position. Allow
sufficient clearance to operate the fast fill and purge lever.
2. Install a shutoff valve upstream of the regulator.
NOTICE
Local codes typically require the use of a backflow
preventer in the system (Watts Model 9D). Consult
local authorities for the type, installation and testing
requirements. The backflow preventer 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 direc-
tion of flow to the boiler.
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
operation. Water will flow into the system until it is full and under pressure.
NOTICE
Series with Fast Fill and Purge Lever
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 permit-
ting 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 tamper-
ing or accidental misuse of the fast fill feature by simply unscrewing the fast fill lever cap and removing the push rod.
2. The regulator is set to deliver water to the boiler at approximately 15 lbs. pressure. This pressure is sufficient for a 3 story building.
To reset the reducing valve for higher pressure (when the pressure 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 lbs. 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.
NOTICE
Watts is not responsible for boiler failure on boilers without low water cutoffs.
WARNING
!
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.
To Radiation
⁄ " valves are equipped with a unique and simple "fast fill and purge
1
2
Installation Diagram
*Pressure
Relief
Valve
To
Expansion
Tank
Hot Water
Boiler
IS-1156F
*Feed Water
No. 9D
Pressure
Backflow
Regulator
Preventer
Shut off
Valve
Drain
Return