Commercial Espresso Machine Basic Requirements
For specific machines, we usually do not post due to the following reasons:
- We sell many different models, and it's difficult to keep
track of any changes by manufacturers on different fittings that can be
- All manufacturers have a tendency to change without any notice to their distributors and dealers
- We do not check every machine that ships
because sometimes within a same batch of machines delivered to us, there
could be a difference.
- Local building codes and ordinances prevail as our instructions may not cover.
- All in all, to put something in writing makes
us responsible (2nd plumber visit, etc.) and the manufacturer does not
reimburse us. We have had manufacturers make changes in this area of
direct water connections. We have received differences in water
connections within the same batch of machines delivered sometimes. Two
examples.... one manufacturer made the same model with 2 drain hoses and
the other with one drain hose. another manufacturer had a 3/8th male
BSPT fitting and it was changed to a male 3/8th NPT filling. In both
cases, there was no notification to us. Unfortunately, this is
industry practice in Europe. This is why we ask every
customer to wait for the machine to arrive and then proceed with the
It is very important to install a "COLD" water supply line that is right under the unit or within 4 feet of the machine. A separate shut-off valve on the water line for the machine is strongly recommended for any emergencies, future preventive maintenance, or possible servicing.
The water line should also have a backflow preventer
as determined by local building codes. Customers should seek the advice
of a local licensed plumber as 1st-line is not aware of all local laws.
In addition, pressure reducer should be installed and
set to maximum 40 pounds of water pressure - the reason is that on some
espresso machines, the water pressure in excess of 45 pounds may open
the internal valves and cause major water leakage.
On commercial espresso machines, the water connection
always consists of a 3/8" diameter water line. It can be attached by
using a 3/8" compression by 3/8 NPT (male thread) fitting. To
ensure a leakproof thread, wrap teflon tape around the NPT threads.
Stainless steel hoses supplied with each commercial espresso machine are
British standard measure; Therefore, the fit between the hose and
fitting (NPT side) will be very tight and may need slight
cross-threading. Tighten the hose nut until the hose no longer swivels
from the nut.
It is important to locate the unit as close as possible to the drain, preferably a floor drain.
The drip tray usually drains into a black box (known
as a catch basin), which in turn, drains into a vinyl tube. The vinyl
tube from the black box must be kept as vertical (steep) as possible
since there are always coffee grinds that will drain. In general, for
every foot of hose that goes horizontal, the drain hose needs to drop
one inch in the direction of the drain. If the vinyl tube is installed
horizontally for more than one foot without the one inch drop, there is a
greater potential for the vinyl hose to clog with grinds. This usually
occurs when the vinyl hose is installed horizontally between the machine
and the counter. Keep the vinyl drain hose from being pinched and
connect it to the floor drain.
It is vital that proper power is readily available prior
to installation. Please note that grinders require 110 volt receptacles
to be located nearby with a connection to a circuit breaker independent
of the espresso machine circuit breaker. For proper operation and un-interrupted operation, all commercial espresso machines should have dedicated circuits.
110 Volt Machines (15 amps or less) -
Utilize standard 110-120 volt power supply with 110 volt plug and a
twenty (15) amperage rating. Standard plug on cord is that found on many
household appliance. Three-prong plugs, including one for ground, is
110 Volt Machines (20 amps) - Utilize standard
125 volt power supply with 125 volt plug and a twenty (20) amperage
rating. Standard plug on cord is NEMA configuration L5-20P. Three-prong
plugs, including one for ground, is required. One of the three terminal
on the plug is horizontal.
220 Volt Machines - Two grouphead units require
single phase power that utilize a NEMA configuration L6-20 type plug and
a twenty (20) amp dedicated circuit.. Three Grouphead units require
single phase power that utilize a NEMA configuration L6-30 type plug and
a thirty (30) amp dedicated circuit.