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General Information - Bosch SST150-40 Installation And Operating Manual

Indirect fired water heaters
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Installation & Operating Manual

1 General Information

The SST series indirect water heater (FIG. 1-1) is designed
to generate domestic hot water in conjunction with a hot
water boiler using forced boiler water circulation. This
indirect water heater consists of a 316L Stainless Steel
tank in which a smooth 304L stainless steel coil is located
(Table 1A). Boiler water is pumped through the coil and
heats the water in the tank. This tank is not intended for
use in pool heating applications or for heating any fl uid
other than water. It is also not intended for use in gravity
hot water heating systems.
Operating Restrictions:
• Maximum domestic hot water temperature is 194°F.
• Maximum boiler water temperature is 210°F.
• Maximum working pressure for the vessel tank is 150
psig.
Component Materials
Component
Tank
Coil
Insulation
Jacket
"E"
"D"
"C"
"B"
"A"
Figure 1-1
6 |
Table 1A
Material
316L Steel Stainless Steel
304L Stainless Steel
Polyurethane
Polypropylene/ABS
"F"
PART NO.
SST150-40
SST250-65
SST300-80
SST450-119
NOTES:
1. 1" NPT ON SST150-40.
22.5°
45°
1-1/2" NPT (SEE NOTE 1) 2
3/4" NPT 1
3
1" NPT
AQUASTAT/SENSOR WELL
1" NPT
4
1-1/2" NPT (SEE NOTE 1)
Single-Wall Heat Exchanger
National Standard Plumbing Code
Single-wall heat exchangers in water heaters comply with
the National Standard Plumbing Code provided that:
• boiler water (including additives) is practically non-toxic,
having a toxicity rating or class of 1, as listed in Clinical
Toxicology of Commercial Products, and
• boiler water pressure is limited to a maximum of 30 psig
by approved relief valve.
Uniform Plumbing Code
Single-wall heat exchangers are permitted if they satisfy all
of the following requirements:
1. The heat transfer medium is potable water or contains
only substances which are recognized as safe by the
U.S. Food and Drug Administration.
2. The pressure of the heat transfer medium is maintained
less than the normal minimum operating pressure of the
potable water system.
3. The equipment is permanently labeled to indicate that
only additives recognized as safe by the FDA shall be
used in the heat transfer medium.
Other heat exchanger designs may be permitted where
approved by local code.
"A"
"B"
"C"
"D"
(in.)
(in.)
(in.)
(in.)
3
8 1/4
25 1/4
48 1/2
9 1/4
3 1/4
28
52 1/2
28
3 1/4
9 1/4
61 3/4
3 1/4
9 1/4
31 3/4
60 1/4
1. RELIEF VALVE CONNECTION
2. HOT WATER OUTLET
3. BOILER WATER IN
4. BOILER WATER OUT
5. DRAIN/COLD WATER INLET
5
SST150 - SST450
Indirect Fired Water Heaters Installation and Operating Manual
WEIGHT
"E"
"F"
FULL OF WATER
(in.)
(in.)
(lbs.)
20
56
515
820
60
24
70
24
921
69
28
1268

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This manual is also suitable for:

Sst300-80Sst250-65Sst450-119