Operating instructions

SOLUTION: The completed Worksheet 1 for this example is shown in Figure 2. The Adjusted Peak Hour
Demand is 195 Gallons per Hour. From Table 1 we see that a MT050G is required.
Use Figure 4b to determine the boiler size required to achieve a 195 GPH First Hour Rating
with an MT050G. From Figure 4b we see that a boiler output of approximately 102,000 BTU/hr
is required. Install a boiler with a 102,000 BTU/hr output.
(a) (b) (c) (d)
Shower:
(3 GPM Head) 21.0 X =
(5 GPM Head) 35.0 X =
(7 GPM Head) 49.0 X =
Bath (30 Gal. Tub) 21.0 X =
Vanity 2.8 X =
Clothes Washer 48.0 X =
Dishwasher 15.0 X =
=
=
=BTU/hr
=BTU/hr
1) Boiler Output Required For Maxi-Therm
2)
Boiler Output Required for Space Heating
WORKSHEET 1: SINGLE FAMILY RESIDENCE
Select a boiler with an output equal to (1) or (2), whichever is GREATER
TOTAL
NUMBER OF
FIXTURES
135F WATER PER
TYPE OF
FIXTURE (Gal/hr)
Peak Hour Demand = Total Column (d)
Peak Hour Demand X 1.20 = Adjusted Peak Demand
=
Kitchen Sink or
Utility Tub
135F WATER
PER FIXTURE
(Gal/hr)
10.0 X
FIXTURE
DESCRIPTION
7