Bell & Gossett V57050B SRS Pneumatic Purge Valve - Manual (Page 2)

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 recom-
mended 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 cer-
tain 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.
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 sole-
noid and timer. See Figure 3.
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
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 instal-
lation. Failure to follow these instructions could result in
serious personal injury or death and property damage.
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.
2
Figure 2
Pilot Valve
Timer
Valve
Actuator
Manual
Purge
Button
Figure 3
Figure 4
Output
Led
Power
Led
Dip
Switches
Cycle Time
Potentiometer Duration of
Purge Time
Potentiometer