Specifications

Multiplex Company, Inc.
Complete System Overview
00218011 Revision B (KAK) 31 July, 2000
8
Carbonator pumps chart
Gallon Per Hour Ounces Per Second Multiplier
100 3.56 0.28
125 4.44 0.23
200 7.11 0.14
240 8.53 0.12
Carbonator pumps metric chart
Liters Per Hour Liters Per Second Multiplier
60 Hz 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz
378.5 318.2 0.105 0.088 9.52 11.36
473 397.6 0.131 0.110 7.63 9.09
757 636.3 0.210 0.177 4.76 5.65
908.5 763.7 0.252 0.212 3.97 4.72
All Multiplex equipment requires carbonator
pumps with a 250 psi (17.6 bar) relief setting.
w This relief valve is designed to relieve in emer-
gency situations
only (when you have a seri-
ous restriction on the outlet of the pump. For
example, a freeze up of the cooling coil in
the water bath, etc.)
w A standard carbonator pump has a 170 psi (12
bar) relief valve setting. Multiplex equipment
generates quite a bit of back pressure, thus
causing the standard 170 psi (12 bar) pump to
relieve excessively. This causes wear to the
relief valve, prematurely weakening the
pump.
Determining the strength of a
carbonator pump
Note: Do not be dispensing drinks during the test.
1. Dispense carbonated water until the carbon-
ator pump cycles on, then stop.
Procedure for properly adjusting
the relief valve setting on a pump
1. Remove the large acorn nut on the top side of
the pump.
2. Mount a gauge on the outlet flow of the pump
(as shown, to totally block the discharge flow).
3. Turn on the pump. While the pump is run-
ning, adjust the relief valve screw so that the
gauge reads 275psi (19.3bar) (250psi
[17.6bar] relief setting + 25psi [1.7bar]
safety factor).
4. Reassemble.
2. Wait for the carbonator to cycle off, then
turn off the electrical switch for the
carbonator.
3. Dispense exactly 50 fl oz (2 L) of carbonated
water only.
4. Turn on the electrical switch for the car-
bonator and time how many seconds it takes
to cycle off. This is the actual cycle time.
5. From the chart on the following page, deter-
mine the expected cycle time.
For example:
50 ounces x .28, for a 100 GPH pump =
14seconds
2 liters x 9.52 for a 378.5 LPH pump = 19sec-
onds
6. If your actual cycle time is much greater
than your expected cycle time, your pump
has been weakened and the capacity of your
equipment has been reduced.
Carbonator Pumps (continued)