Water Piping And Controls; General; Operating Parameters; System Components - RBI IEW-199 Installation And Operation Instructions Manual

WATER PIPING AND CONTROLS

4. WATER PIPING & CONTROLS
A. GENERAL
1. Size water supply and return piping in accordance
with system requirements. Do not use smaller
diameter piping than the boiler connections.
2. If the Infinite Energy boiler is used to replace an existing
boiler, make sure that the system piping is thoroughly
cleaned and free from debris before installation.
3. In systems where sediment may exist, install a strainer
in the boiler return piping to prevent large particles
and pipe scale from entering the boiler heat
exchanger. Use a large mesh screen in the strainer.
4. Install this boiler so that the gas ignition system
components are protected from water (dripping, spraying,
etc.) during operation and service (pump replacement,
condensate trap cleaning, sensor replacement, etc.).
5. The Infinite Energy boiler is supplied with a default
tank temperature setpoint of 120°F (49°C). However,
the setpoint can be set as high as 158°F (70°C) which
can potentially cause scald injury. If the tank
temperature is set to above 120°F (49°C), RBI
recommends the use of a mixing valve to provide
lower temperature water to faucets and shower heads.
DANGER
!
Water temperatures over 125°F
(52°C) can cause severe burns
instantly, or death from scalds.
Children, disabled, and elderly
are at the highest risk of being
scalded.
See instruction manual before
setting temperature at water heater.
Feel water before bathing or showering.
Temperature limiting valves are available, see
manual.
B. OPERATING PARAMETERS
1. The Infinite Energy boiler is designed to operate in an
open loop domestic water heating system under
forced circulation with a water storage tank. The
system must be completely filled with water at all
times and water must be circulating through the boiler
while the unit is firing for it to operate effectively.
2. The minimum system pressure is 14.5 PSI (69 kPa).
3. Table 4.1 lists the minimum flow rates for each Infinite
Energy model.
Table 4.1: Minimum Flow Rate
Infinite Energy
Model
IEW-199
IEW-399
14
Minimum Flow Rate
Water GPM (LPM)
5.5 (20.8)
13.2 (50.0)
4. Table 4.2 provides the water volume of the heat
exchanger including the supply and return pipes that
are attached at the factory.
Table 4.2: Heat Exchanger Water Capacity
Infinite Energy
Model
IEW-199
IEW-399
NOTICE
Water temperature rise and maximum flow data is
based on heating potable water with a hardness of 5
to 25 grains per gallon and total dissolved solids not
exceeding 350 ppm.
5. The required temperature rise and the standard
circulating pump are sized based on the heating of
potable water with a hardness of 5 to 25 grains per
gallon and a total dissolved solids not exceeding 350
ppm. Consult the manufacturer when heating potable
water exceeding these specifications.
Heating of high hardness and/or high total dissolved
solids water may require a larger circulating pump,
and a revised temperature rise specification based on
the water chemistry of the water to be heated.
Water with a hardness of less than 5 grains per gallon
will usually have a pH which can be aggressive and
corrosive causing non-warrantable damage to the
pump, and associated piping. Corrosion due to water
chemistry generally shows up first in the hot water
system because heated water increases the rate of
corrosive chemical reactions.
C. SYSTEM COMPONENTS
1. Pressure/Temperature Gauge: A combination
pressure/temperature gauge is provided with each
boiler to be mounted in the piping from the boiler
supply to the system as shown in Figure 4.1. Most
local codes require this gauge.
2. Potable Water Expansion Tank: An expansion tank is
required to provide room for expansion of the heating
medium (water or glycol solution). Consult the expansion
tank manufacturer's instructions for specific information
regarding installation. The expansion tank is to be sized
for the required system volume and capacity. In addition,
be sure that the expansion tank is sized based on the
proper heating medium. Glycol solutions may expand
more than water for a similar temperature rise.
3. Y-Type Strainer or Filter Ball
the use of a strainer device in the system to prevent
dirt or sediment from clogging the heat exchanger. A
20 mesh stainless steel screen is adequate to protect
the heat exchanger. The strainer should be cleaned
often in the first several months of operation. The Filter
Ball ® Valve from Jomar International incorporates a
strainer into a ball valve which allows the technician to
isolate the water circuit while cleaning the strainer.
Total Water Capacity
Gallons (Liters)
1.19 (4.50)
2.60 (9.84)
® Valve: RBI recommends