HOTOWELL HTW-F61KB Series User manual

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HTW-F61 Liquid Flow Switches are Single - Pole,
Double - Throw (SPDT) flow switches that are used
in liquid lines carrying water,ethylene glycol,or other
liquids not classified as hazardous, They can be
wired to energize one device and de-energize an-
other device powered from the same source when
liquid flow either exceeds or drops below the set
flow rate.
Note: The F61 Flow Switch cannot be used where
F61 Flow Switches are designed for
the liquid in the pipes will drop below the
liquid's freezing point, causing an internal
freeze-up.
IMPORTANT:
use only as operating controls. Where
an operating control failure would re-
sult in personal injury and /or loss of
property, it is the responsibility of the
installer to add devices (safety, limit
controls) or systems (alarm, supervi-
sory systems) that protect against or
warn of control failure.
Figure 1: F61KB Flow Switch
Figure 2: F61KB Dimensions (in./mm)
FLOW-MO
4.00
102 2.00
51
2.66
68
4.78
1.28 1.10
28
121
33
1.72
1.39
35
2.78
71 0.875
22.23
0.50
13
1.093
27.76
0.75
19
44
Use these wrench flats
to tighten the flow switch
at installation.
Paddle
screw
1 in. 11-1/2 NPT
C
Diameter Hole
for Conduit with
Diameter Knockout
Ring for Conduit
Grounding Screw Hole
D
Pipe Size
1.00
25
2.00
51
3.00
76
4.00
101
5.00
152
1.44
37
2.53
64
3.51
89
6.60
168
6.60
168
1.00
25
1.13
29
1.13
29
1.13
29
1.13
29
C D
HTW-F61KB Series Liquid Flow Switch
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Installation
Figure 3: Trimming Template for the Extra Paddle
The F61 comes with a 3-piece paddle (1 in., 2 in.
and 3 in. segments) installed,Each piece is remov-
able. Adjust the paddle to the size of the pipe in
which it will be installed.For 1 in.,2 in.or 3 in.pipe,
use the paddle segments as supplied. Mount the flow switch in a standard 1 in.x1in.x1in.
tee for 1 in.pipe installation. Use a reducing tee for
larger size of pipe to keep the flow swich close to
the pipe and provide adequate paddle length in the
flow stream.
Screw the flow switch in position so the flat of the
paddle is at a right angle to the flow. The arrow on
the side of the case must point in direction of the
flow.
The F61 Flow Switch may be mounted in a hori-
zontal pipe line or a vertical pipe line with upward
liquid flow. It is not recommended for installations
where flow is downward. When mounted in a verti-
cal pipe line with upward flow,the switch will trip at
a slightly higher flow than shown in Table 1 due to
the effect of gravity on the switch mechanism.
To avoid damaging the switch, do not
tighten the switch to the tee by grasping
the switch enclosure.Use only the wrench
flats provided.
The switch should be mounted so the terminals or
wire leads are easily accessible for wiring.
Note: These flow switches must not be subjected to
water hammer.If a fast-closing valve is located
downstream of the flow switch,a suitable water
hammer arrester must be used.
Mount the F61 in a section of pipe where there is a
straight run of at least five pipe diameters on each
side of the follow switch.
Figure 4: Typical Installation
1 in 2 in 3 in 4 in 5 in 6 in2.5 in
1.5
in Original
paddle
length
IMPORTANT: To allwo the switch to detect changes
in the flow condition, the paddle must
not touch the pipe or any restrictions in
the pipe.
Flow
Flow Switch Arrester
Valve
Figure 5: Arrester Location Schematic
A A
Flow
Flow
Tee or Welded
Half-coupling
Dimension "A" must be at least five pipe diameters
from the nearest elbow, valve, or other pipe restriction.
CAUTION: Equipment damage hazard.
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Wiring
Adjustments Checkout Procedure
Figure 7: Switch Action
Figure 6: Minimum Adjustment
To avoid possible electric shock or dam-
age to the equipment. disconnect the
power supply before the wiring connec-
tions or adjustments are made.
To adjust the setting of the flow switch:
1. Remove the F61 cover.
2. For higher flow rates, turn the adjusting screw clock-
wise. To lower the flow rate after it has been raised
from the factory setting, turn the adjusting screw coun-
terclockwise.
3. Check to see that the flow switch is not set lower than
the factory setting by depressing the main lever nu-
merous times. If the lever fails to "click" upon return
at any time, turn the adjusting screw clockwise until
the lever clicks upon return every time.
The circuit between the red and the yellow leads (termi-
nals) will close when sufficient liquid flows through the
pipe to trip the F61 (see Table 1). A low flow indicator
light or signal, when used, will activate when the liquid
flow decreases or ceases.
Before leaving the installation, observe at least three
complete operating cycles to be sure that the F61 and
the system to which it is connected are functioning cor-
rectly
The switch is factory set at approxi-
mately the minimum flow rate (see
Table 1 ). Do not set lower than the
factory setting as this may result in
the switch failing to return to a'no
flow' position.
Sealed settings(screws marked with
black paint) are not intended to be
changed. Adjustment attempts may
damage the control or cause loss of
calibration, voiding the warranty.
Make all wiring connections using copper conduc-
tors only.
Install all wiring in accordance with the National Elec-
tric Code and local regulations.
WARNING: Shock hazard.
CAUTION: Improper operation hazard.
CAUTION: Equipment damage hazard.
Action of Switch
on an lncrease
in Flow Above
the Setpoint
Action of Switch
on an Decrease
in Flow Above
the Setpoint
Range
Adjustment
Screw
Yellow Yellow
Blue Blue
Red (common) Red (common)
Main
Lever
Adjusting
Screw
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HTW-F61 KB Flow Switch
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Table 1: Typical Flow Rates
Specifications
3
GPM(m /hr)Required to Actuate Switch
Pipe Slze(in.) 1
4.2
(1.0)
2.5
(0.6)
8.8
(2.0)
8.5
(1.9)
5.8
(1.3)
3.7
(0.8)
1.3
(3.0)
12.5
(2.8)
5.0
(1.1)
19.2
(4.4)
18.0
(4.1)
9.5
(2.2)
29.0
(6.6)
27.0
(6.1)
12.5
(2.8)
34.5
(7.8)
32.0
(7.3)
19.0
(4.3)
53.0
(12.0)
50.0
(11.4)
7.5
(1.7)
13.7
(3.1)
18.0
(4.1)
27.5
(6.2)
65.0
(14.8)
37.0+
(8.4)
125.0
(28.4)
57.0+
(12.9)
101.0
(22.9)
41.0+
(9.3)
50.0
(11.4)
27.0+
(6.1)
245.0
(55.6)
118.0+
(26.8)
128.0
(29.1)
81.0+
(18.4)
235.0
(53.4)
111.0+
(25.2)
122.0
(27.7)
76.0+
(17.3)
190.0
(43.1)
74.0+
(16.8)
158.0
(35.9)
54.0+
(12.3)
375.0
(85.2)
144.0+
(32.7)
360.0
(81.8)
135.0+
(30.7)
375.0
(85.2)
205.0+
(46.6)
320.0
(72.7)
170.0+
(38.6)
760.0
(172.6)
415.0+
(94.2)
730.0
(165.8)
400.0+
(90.8)
1-1/4 1-1/2 22-1/2 34* 5* 6* 8*
Minimum
Adjustment
Flow
Increase
R to Y
Closes**
Flow
Decrease
R to B
Closes**
Flow
Increase
R to Y
Closes**
Flow
Decrease
R to B
Closes**
Maximum
Adjustment
* Flow rates for these sizes are calculated.
+ GPM figures are for a switch with a 6 in. paddle, For 4 in. And 5 in. Line pipe, the 6 in. Paddle is trimmed to a 4 in. and 5 in.
length, respectively.
** For switching action, refer to Figure 7.
Product
Maximum Liquid Pressure
Minimum Liquid Temperature
Maximum Liquid Tempreature
Electrical Ratings
Horsepower
Full Load Amperes
Locked Rotor Amperes
Non-inductive Amperes
Pilot Duty
Wiring Connection
Pipe Connector
150psig(1034kPa)
32°F(0℃)
250°F(121℃)
120VAC 208VAC
1
8.8
52.8
16.0
240VAC
1
8.0
48.0
16.0
125VA at 24/277VAC
277VAC
-
-
-
16.0
1
16.0
96.0
16.0
Screw Type Terminals
1 in. 11-1/2 NPT Threads
Conduit Connection One 7/8 in.(22mm) Hole for 1/2 in. Conduit with 1-3/32 in. (28mm) knockout Ring for 3/4 in.
Conduit
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