Bell & Gossett V57050B User Manual

INSTRUCTION MANUAL

SRS
Pneumatic
Purge Valve

WARNING LABEL PART NO. V56845
INSTALLED IN THIS LOCATION.
IF MISSING, IT MUST BE REPLACED.

V57050B

INSTALLER: PLEASE LEAVE THIS MANUAL FOR THE OWNER’S USE.

SAFETY
INSTRUCTIONS

This safety alert symbol will be used in this manual to draw
attention to safety related instructions. When used, the safety
alert symbol means ATTENTION! BECOME ALERT! YOUR
SAFETY IS INVOLVED! FAILURE TO FOLLOW THESE IN­STRUCTIONS MAY RESULT IN A SAFETY HAZARD.

DESCRIPTION

The SRS Pneumatic Purge Valve is an air-operated diaphragm
valve with programmable timer. It is used to purge sediment
from an open or closed loop hydronic system that is sepa­rated out and collected in the bottom of the SRS.

OPERATIONAL LIMITS

Maximum Fluid Operating Temperature: 250°F (121°C)

Maximum Fluid Operating Pressure: 150 PSI (1034 kPa)

Min/Max Ambient Temperature: 32-130°F (0-54°C)

Min/Max Control Air Pressure: 65-145 PSI (450-1000 kPa)

INSTALLATION INSTRUCTIONS

Connections Required To Valve/Timer:
120V AC (±10%) to timer 3-terminal strip.
Air connection to 1/4" FNPT port on solenoid
Valve. 1" FNPT inlet and outlet.

1. Reference Sediment Removal Separator Instruction Manual
A05767.

2. For best results, purge valve/timer should be installed up­stream of any pipe bends.

3. The purge valve/timer can be installed in any orientation.

4. A manual gate or ball valve is recommended between the
SRS and the purge valve/timer in the event that the purge
valve needs repair. During normal operation, this manual
valve must remain fully open.

CAUTION: The use of PTFE impregnated pipe com-

pound and PTFE tape on pipe threads provides
lubricity which can lead to overtightening and breakage.
Do not overtighten. Failure to follow this instruction can
result in MODERATE personal injury from hot water and/or
property damage.

AUTOMATIC

Figure 1

INLET

FROM BOILER

CHILLER OR
CONVERTER

B&G SEDIMENT

REMOVAL

SEPARATOR

MANUAL

SHUTOFF

VALVE

AIR VENT

OUTLET

TO PUMP
SECTION

BLOW DOWN

VALVE

5. Pipe as required to allow gravity flow of sediment and
water, and proper drainage.

6. Apply approximately 2 wraps of PTFE tape to the male end
of 1" field piping as it comes from the SRS and recom­mended service valve, and install into the inlet of the 1"
FNPT connection of the purge valve. Do the same for the
1" FNPT outlet and run the piping to a nearby drain.

7. Run air for the valve in accordance with local code. Be cer­tain that the minimum and maximum control pressure for
the air are complied with. Purchase a 1/4" air hose adapter,
apply PTFE tape to the threads, and insert into the 1/4" air
port on the side of the solenoid valve as shown in Figure 2.
Then attach tubing.

Timer

OPERATING INSTRUCTIONS

The timer is factory set as follows:
Cycle Time (how often the valve opens): 4 hrs.
Purge Duration (how long valve remains open per cycle): 10 sec

At start-up, the valve can be manually purged by depressing
the button located on the side of the solenoid. (See Figure 4).
We recommend manually purging the valve approximately
every 30 minutes for 2 hours to determine if the factory setting
is sufficient to handle the sediment problem in the system.
Keep in mind that the first hour of start up will typically have a
greater concentration of sediment than that found after several
hours of operation.

If the factory setting is insufficient, adjustment is made by a
series of DIP switches in the timer. The switches are accessed
by removing the cover of the timer. Figure 3 is a sketch of the
timer assembly, and Figure 5 is a diagram of the DIP switches
and the range of settings available.

TIMER CONNECTIONS & ADJUSTMENTS

Valve

Actuator

Pilot Valve

Figure 2

WARNING: Water at temperatures above 100°F

(38°C) can be very hazardous. Piping from valve to
drain should be such that there is no risk of exposure of
hot water to personnel or equipment. Failure to follow
these instructions could result in serious personal injury or
death and property damage.

WARNING: Electrical shock and potential circuit

damage. Disconnect power before beginning instal­lation. Failure to follow these instructions could result in
serious personal injury or death and property damage.

Cycle Time
Potentiometer

Output

Led

Figure 3

Duration of
Purge Time
Potentiometer

Dip
Switches

Power

Led

WARNING: Improper wiring and wire can cause

electrical shock and fires. Wiring connections must
be made in accordance with all applicable electrical codes
and ordinances. Use copper wire only. Failure to follow
these instructions could result in serious personal injury or
death and property damage.

8. Install 120V AC to the timer per local code. Remove the
timer cover to expose the 3 terminal strip. Connect 120V
AC to the terminal strip. Attach the middle terminal to
ground. These connections provide the power for the sole­noid and timer. See Figure 3.

2

Manual

Purge

Button

Figure 4