07/21/11 AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
•
Ph: 800-526-0288
Page
189
of
200
GF-5080
TAG-0046_0A
Commercial Laundry Sizing Guide
1-minute fill time
1 or 2 machines:
MID = 0.30GPM
•
capacity of largest machine in pounds
3 or more machines:
MID = 0.30GPM • capacity of largest machines in pounds PLUS
0.15GPM • total capacity of all other machines in pounds
30-second fill time
1 or 2 machines:
MID = 0.60GPM
•
capacity of largest machine in pounds
3 or more machines:
MID = 0.60GPM • capacity of largest machines in pounds PLUS
0.25GPM • total capacity of all other machines in pounds
SELECTING TANK NOZZLES AND PIPE SIZES
Using the calculated MID, select a tank nozzle and pipe sizes from Chart C. Choose tank water inlet and outlet
connections to keep velocities below 2 fps (feet per second). Choose sizes to velocities below 7 fps. Note on Figure 1
and Figure 2, that the piping between the tank and heater(s) does not see the MID, only the pumped flow rate.
Therefore, this piping only needs to be selected for the pumped flow rate.
ALTERNATE SIZING: DESIGNING FOR NO SUPLEMENTAL STORAGE
In a small laundry (up to 200 pound total machine capacity, and where fill times of 1 minute or longer are acceptable),
it is practical to consider the use of the AERCO Innovation heater without any supplemental storage.
Heater capacity is selected equal to the maximum instantaneous demands (MID) as calculated for the standard
system above.
EXAMPLE (Alternate Sizing):
A small laundry with incoming water 40°F in winter and water to machines 160°F has
the following laundry machines:
1 with 75 pound capacity
1 with 50 pound capacity
125 pounds = Total Capacity
Heater Capacity:
MID for largest machine
=
75 pounds • 0.30GPM
=
22.5 GPM
MID for all other machines
=
50 pounds • 0.15GPM
=
7.5 GPM
Total MID
=
30.0 GPM
From Chart A, heater selection is: 2 INN1060 heaters
Pg. 5 of 10
