PULSE BREW AND PRE-INFUSION (continued)
Pulse Feature Operation
Water Outflow (Delivery)
Rates
The pulse feature will be activated if it has been accessed as
above, and values have been programmed into the 3 pulse brew
items. When the pulse brew begins, the brew valve will be
opened for the number of seconds programmed for “Initial Valve
Time” (Init Vlv Time). The valve will then close for the number of
seconds in “Pulse Delay”, then open for the number of seconds in
“Pulse Valve On”. The pulse cycle (Pulse Delay plus Pulse
Valve) will be
repeated continuously until the brew valve has
been opened for the “Total Valve” Time
. The E-Max™ will
calculate the number of seconds for the full brew and display it on
the LCD to begin the brew and it will also calculate how many
pulse cycles are required to complete the brew. (If a final partial
“Pulse Valve On” is required this will also be calculated
automatically.)
The outflow rate of water from the spray head is required to
calculate valve time for different volumes. Spray head outflow
rates are based on the standard 64-ounce coffee brew requiring
156 seconds of the brew valve being open. This is an outflow
rate of 0.410 ounces per second. To calculate Total Valve time
the ounces required should be divided by 0.410 oz/second.
Each brewer may have a slightly different flow rate based on
whether the brewer is level, scale build up on lines, etc. Minor
adjustments may be required to get precise volume. Examples
of different volumes and valve times are as follows:
Decanter and Airpot/Thermal Brewers
Volume
Total Valve
in Ounces
Time
32
88
Half of Standard Glass Decanter
64
177
Standard Decanter - ½ gal. brew
74
205
Airpot 2.2 Liters
85
236
Thermal Server 2.5 Liter
Tea Brewer
Brew
Brew
Bypass
Total
Volume
Valve
Valve
Ounce
3 Gal.
128 oz / 319 sec
256 oz / 319 sec
384
5 Gal.
212 oz / 529 sec
428 oz / 529 sec
640
20
654 p/n
73674
E-Max™
Prog
ra
mm
ing
M
a
n
ual
