Supplying Make Up Air; Low Water Temperature Protection; Empyre System Optimizer - Pro-Fab Industries Empyre Elite 100 Installation And Operation Instructions Manual

supplying make up air

Fireplaces, other furnaces, clothes dryers, exhaust fans,
and other appliances all draw air from the room in which
they are located. The Empyre Elite adds to that draw, mak-
ing it important to ensure there is an adequate source of
fresh air to offset these demands. Otherwise, a negative
pressure may be created in the room and starve combus-
tion in the furnace.
1. Determine the volume of space (cubic feet) in the
room. Include in the calculation adjacent rooms and
areas not closed off by doors.
Volume (CF) = Length (ft) x Width (ft) x Height (ft)
2. Determine the air input requirements of all applianc-
es in the space. Add them and round the total to the
nearest 1000 BTU per hour. The Empyre Elite 100 re-
quires 85 CFM (cubic feet/minute), the Elite 200 re-
quires 120 CFM.
3. Determine whether the space is 'confined' or 'uncon-
fined' by dividing the total volume of the room by the
total input requirements for all appliances in the room.
a. If the result is equal to or greater than 50 CF/1000
BTU per hour, then consider the space 'unconfined.'
b. If the result is less than 50 CF/1000 BTU per hour,
then consider the space 'confined.'
4. For an 'unconfined' space in a conventionally con-
structed building, the fresh air infiltration through
cracks around windows and doors NORMALLY pro-
vides adequate air for combustion and ventilation,
and therefore no additional make up air is required.
5. For a 'confined' space or an 'unconfined' space in a
building with unusually tight construction, an addition-
al source of make up air is required. Please consult an
HVAC professional to determine the best way to supply
make up air for this type of installation.
Important: Furnace room must never be in a negative
pressure condition. Negative pressure could result in
smoke in the room.
EmpyrE ElItE InstallatIOn and OpEratIOn manual

low Water temperature protection

It Is tHE rEspOnsIBIlIty OF tHE InstallEr tO
prOVIdE lOW WatEr tEmpEraturE prOtECtIOn
In tHE dEsIGn OF tHE HEat dIstrIButIOn systEm
The Empyre Elite furnace is no different than an oil boil-
er or gas boiler in that condensation of the products of
combustion will occur if flue gases come in contact with
a surface that is less than 140°F (60°C). With an oil or
gas boiler the rate of fuel and consistency of the fuel is
automatic, so if the temperature of the water in the boiler
falls below the desired setting the burner comes on auto-
matically raising the water temperature. The Empyre Elite
requires an automatic protection from low water tempera-
ture because of the manual fuel feed.
Condensation (water) in the boiler tubes will cause corro-
sion and premature failure. The Emyre System Optimizer,
as installed in Figures 1-3, pages 12 and 13, gives the
Empyre Elite excellent protection from low water tempera-
tures.

Empyre system Optimizer

The Empyre System Optimizer (ESO) is designed with a low
loss header which includes a Danfoss VTC valve, complete
with a pump flange and bypass piping. The Danfoss
VTC tempering valve was selected for its simplicity and
reliability.
The Empyre System Optimizer is mandatory on all Empyre
Elite installations in order to maintain the warranty.
How the EsO and Valve Operates
The Empyre System Optimizer provides a constant
circulation of water through the boiler and the Danfoss VTC
tempering valve. Water is drawn off the low loss header by
the building piping system and returned to that same loop
where it mixes with the water in the low loss header. Before
it reenters the boiler, it passes through the tempering valve.
If the water entering the valve is too cold, the valve starts
to slow the water returning and mixes it with water coming
directly from the boiler. If the return water temperature
drops below 140°F (60°C) the valve will stop this cold
water from entering the boiler. The valve will open again
when the boiler water rises in
InsTallaTIon
temperature.
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