Installation Instructions; General; Indoor Ventilation / Air Exchange Requirements - L.B. White Bloom 400 Owner's Manual And Instructions

Installation Instructions

General

Direct fired heaters discharge combustion by-products
with the heated air in to the area being heated. These
include CO, CO2, NO, NO2, and Ethylene. These gases
can result in harm to the worker or the plants.
U.S. standards for
maximum heater
discharge:
CO (ppm rise) 5.0
NO2 (ppm rise) 0.5
CO2 (ppm) 4,000
Ethylene (ppm) .015
The Bloom greenhouse heater has been specifically
designed and developed to meet or exceed these com-
bustion standards.
Greenhouses have a natural air leakage factor. This
natural leakage is influenced by the design and physical
condition of the greenhouse as well as wind conditions
and other factors. This natural leakage factor cannot be
relied upon as being sufficient to provide the necessary
air exchange within the greenhouse. Proper installation
of this heater must include provision for adequate air
exchange as follows:
Indoor Ventilation / Air
Exchange Requirements
This heater requires air exchange for proper combustion
and operation. The air exchange is created by a
supply of fresh air to the heater and exhausting the air
used in the combustion process. This is accomplished
by two methods:
a. Natural Ventilation (non-mechanical):
-- The air inlet and discharge openings shall be 1 in.
(6.5 cm
2 ) / 1,000 Btu/h (0.29 kW) of the total input
rating of the heater.
-- The air inlet and discharge openings shall be
permanently fixed in an open position to ensure
minimum ventilation required by the heater.
-- The air inlet shall be located as close as possible to
the heater. Furthest distance shall not exceed 6 ft.
(1.83 m) above, below, or to the sides of the heater.
Bloom 400 Greenhouse Heater
-- The exhaust discharge location shall be located op-
posite from the heater's discharge in an upper area
of the greenhouse or directly in line to the heater's
discharge. DO NOT locate the exhaust discharge in
an area lower than the heater's discharge.
b. Mechanical ventilation:
All heater installations shall have:
-- An air inlet of at least 400 in.
-- An exhaust fan capable of supplying 2.5 cfm/.007 m
min. of air exchange per 1,000 Btu/h (0.29 kW)
Depending on size of the greenhouse, and the number
of heaters installed, the ventilation/air exchange may be
accomplished by the greenhouse's present ventilation
system consisting of larger intake and exhaust fans.
Ensure the heater is installed so it is in line to or slightly
below the exhaust fan at the opposite end of the green-
house.
The mechanical air exchange system shall be interlocked
to the heater to prevent operation should the air exchange
system not operate.
Regardless of air exchange system used, it is
recommended to install a CO/CO2 meter to ensure
workplace safety.
Increased ventilation rates may be required to ensure
low levels of these and other combustion gases as
listed in these instructions.
Can cause property damage, severe injury or death.
To avoid dangerous accumulation of fuel gas, turn
off gas supply at the appliance service valve before
starting installation, and perform gas leak test after
completion of installation.
2 1. Read all safety precautions and follow L. B. White
recommendations when installing this heater. If during
the installation or relocating of heater, you suspect that
a part is damaged or defective, call a qualified service
agency for repair or replacement.
2. Ensure the heater is properly positioned and, using a
level, is hung level. Install according to minimum safe
distances from combustible materials. Safe clearances
are given on the heater's data plate and on page 4 of
the manual.
Owner's Manual • Bloom 400
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WARNING
Burn Hazard
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