ITT Bell & Gossett Aquastat Series Operation manual

SAFETY
INSTRUCTIONS
This safety alert symbol will be use in this manual an on the
pump Safety Instruction ecal to raw attention to safety relate
instructions. When use , the safety alert symbol means AT-
TENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED!
FAILURE TO FOLLOW THE INSTRUCTIONS MAY RESULT IN
A SAFETY HAZARD.
APPLICATION
To increase the overall efficiency of a hot water recirculation
system, the TC-1 timer control kit an the AQS-1/2an AQS-3/4
aquastat kits can be installe for use on any B&G NRF, NBF or
Series PL circulator. The TC-1 timer control is programmable
to turn the circulator ON an OFF automatically at preset
times. The aquastat kits switch the pump OFF at 120°F
(48.9°C) an ON at 100°F (37.8°C). The timer an aquastat kits
can be use in combination or they can be use separately.
This permits the user to have the pump circulate hot water
only uring those times when high usage can be expecte
throughout the ay. When the aquastat kit an timer are use
together, the pump will only circulate water when the ON time
con itions are met an when the water temperature is low
enough to cause the aquastat to switch ON.
OPERATIONAL LIMITS
For use on B&G mo els NRF/NBF/Series PL, in oor use only
Power supply: 115-120 VAC, 60Hz, 1Ø
Minimum switch interval: 15 minutes
Run Mo es: ON (continuous run), OFF (off at all times), TIMER
(run at programme intervals)
Maximum switch current: 16 amps
Aquastat switch mo es: OFF (open) at 120°F (48.9°C) an ON
(close ) at 100°F (37.8°C)
Aquastat type: Bimetal element, senses surface temperature
of outsi e iameter of pipe
Pipe Size: AQS-1/2clips onto 1/2" copper pipe or 3/8" steel pipe
(OD of pipe 5/8")
AQS-3/4clips onto 3/4" copper pipe or 1/2" steel pipe
(OD of pipe 7/8")
Mounting: May be installe to sense temperature at the suc-
tion or ischarge pipe of the pump
NOTE! Aquastat operation is epen ent on ambient eviron-
ment. In installations with excessive heat gain or loss in the
ambient may affect the on/off operating temperatures.
INSTALLER: PLEASE LEAVE THIS MANUAL FOR THE OWNER’S USE.
Bell & Gossett
Automatic Timer Kit Mo el TC-1
Aquastat Mo els AQS-1/2, AQS-3/4
Pumps With Plug-In Cor s
Installation, Operation & Service Instructions
Bell & G ssett
Instruction Manual P58749
REVISION B

TIMER INSTALLATION
1. Disconnect the electrical supply to the pump.
2. Remove the screw that hol s the steel con uit box cover
to the pump.
3. Remove the con uit box cover. The timer assembly replaces
the con uit box cover.
4. Disconnect the black an white motor lea s from the power
supply.
5. Position the plastic base for the timer assembly onto the
steel con uit box with the warning/caution label to the rear
of the pump.
6. Secure the plastic timer base to the con uit box with one
8-32 screw provi e .
7. Verify that the electrical rating of the timer matches the
values shown on the nameplate of the circulator.
8. Make the electrical connections accor ing to the wiring
iagram provi e . (See Figure 2)
9. Position the cover/timer assembly over the base while
insuring that all wires are insi e the box. Note that the
cover/timer assembly can only be assemble in one irec-
tion on the base. Line up the screw holes in the cover with
the screw holes in the base.
10. Fasten the cover to the base using (2) 8-32 screws provi e .
AQUASTAT INSTALLATION
1. Follow steps 1 an 2 in the timer installation section.
2. Remove the con uit box cover. If the aquastat is installe
without the timer, the steel cover is reassemble on the
pump after the aquastat installation is complete.
3. Fasten the aquastat clip to the ischarge or suction pipe of
the pump.
4. Make the electrical connections accor ing to the wiring
iagram provi e . (See Figure 1)
5. Reassemble the con uit box cover to the con uit box while
insuring that all wires are insi e the box. Reinstall the 8-32
screw to secure the cover to the con uit box.
WARNING: ELECTRICAL SHOCK HAZARD
Disconnect an lock out the power before making
electrical connections. Failure to follow these instructions
coul result in serious personal injury or eath.
2
WARNING: ELECTRICAL SHOCK HAZARD
Electrical connections are to be ma e by a qualifie
electrician in accor ance with all applicable co es, or i-
nances an goo practices. Failure to follow these instruc-
tions coul result in serious personal injury, eath an /or
property amage.
WARNING: ELECTRICAL SHOCK HAZARD
Electrical connections are to be ma e by a qualifie
electrician in accor ance with all applicable co es, or i-
nances an goo practices. Failure to follow these instruc-
tions coul result in serious personal injury, eath an /or
property amage.
FIGURE 1
BLACK
WHITE
WHITE
BLACK
BLACK
WHITE
WHITE
BLACK
54321
L
WHITE
N
LBLACK
CAPACITOR
TIMER
AQUASTAT
FIGURE 2
CAPACITOR

FIGURE 5
PROGRAMMING
RING
TIMING ARROW
ON, OFF, AUTO SWITCH
PROGRAMMING
TABS
REAL TIME
CLOCK
AQUASTAT AND TIMER INSTALLATION
1. Follow the installation steps in both sections an see
Figure 3 for wiring connections.
TIMER PROGRAMMING
1. A just the programming ring on the unit by turning it in the
irection of the rotation arrow until the timing arrow points
to the actual time of ay. (This can also be accomplishe
by rotating the minute han on the real time clock, (shown
in figure 5) clockwise, until both the real time clock an the
timing arrow in icate the actual time of ay.)
2. Restore power to the circulator an set the switch on the
timer ial to the “I” (ON) position.
3. Program the “ON/OFF” times by pushing the programming
tabs towar the center of the ial for “OFF” operation an
towar the outsi e of the programming ring for “ON” time
perio s. A pencil, pen or similar object may be use in
making a justments to the programming tabs.
4. Set the manual switch to the “TIMER” position, which is
centere between the “I” an “O” on the timer ial, in
or er to cycle the pump accor ing to the programming tab
settings. The pump will run continuously when the switch
is set to the “I” (ON) position. The “O” (OFF) position of the
switch will shut the circulator off at all times.
5. In the event of a power outage, the timer must be a juste
for the correct time of ay after power is restore .
3
FIGURE 3
FIGURE 4
BLACK
WHITE
BLACK
WHITE N
L
BLACK
CAPACITOR
AQUASTAT
TIMER
POWER
LEADS SUPPLIED BY
OTHERS
WHITE
54321

PUMPS WITH FLEXIBLE CORD
1. Refer to instruction Manual P58671 or P48419 for installa-
tion of the pump.
2. If your pump is equippe with a flexible cor , insert the
115V plug into a properly groun e 115V outlet. (see
Figure 6)
WARNING: ELECTRICAL SHOCK HAZARD
This pump is supplie with a groun e con uctor. To
re uce the risk of electric shock, connect only to a properly
groun e , groun ing-type receptacle. Failure to follow
these instructions coul result in serious personal injury or
eath.
FIGURE 6
ITT
8200 N. Austin Avenue
Morton Grove, IL 60053
Phone: [phone]
Fax: [phone]
www.bellgossett.com
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