Operating instructions

8
Figure 2: Completed Worksheet 1 and Boiler Output Graph From Example 1
(a) (b) (c) (d)
Shower:
(3 GPM Head) 21.0 X =
(5 GPM Head) 35.0 X
1
=
35.0
(7 GPM Head) 49.0 X
1
=
49.0
Bath (30 Gal. Tub) 21.0 X =
Vanity 2.8 X
2
=
5.6
Clothes Washer 48.0 X
1
=
48.0
Dishwasher 15.0 X
1
=
15.0
=
162.6
=
195.1
=
102,000
BTU/hr
=
80,000
BTU/hr
1) Boiler Output Required For Maxi-Therm
2)
Boiler Output Required for Space Heating
Select a boiler with an Output equal to (1) or (2), whichever is GREATER
=
10.0
Peak Hour Demand = Total Column (d)
Peak Hour Demand X 1.20 = Adjusted Peak Demand
Kitchen Sink or
Utility Tub 10.0 X
1
WORKSHEET 1: SINGLE FAMILY RESIDENCE
FIXTURE
DESCRIPTION
135F WATER
PER FIXTURE
(Gal/hr)
TOTAL
NUMBER OF
FIXTURES
135F WATER PER
TYPE OF
FIXTURE (Gal/hr)
0
50
100
150
200
250
0 50000 100000 150000
BOILER OUTPUT (BTU/hr)
FIRST HOUR RATING (GAL/hr)
Figure 4b: MT050G Ratings at Different Boiler Outputs