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Dayton Operating Instructions and Parts Manual
4
Dayton Propane
Construction Convection Heater
®
3VH22
Propane Supply
Propane gas and propane tank(s) must be
provided by the customer.
Use this heater only with a propane vapor
withdrawal supply system. See Chapter 5
of the Standard for Storage and Handling
of Liquefied Petroleum Gas, ANSI/NFPA 58
and/or CAN/CGA B149.2. Your local library
or fire department will have this booklet.
This heater will operate with a 20-pound
propane tank. However, you can only
operate it in the LOW position during
mildly cool weather. At higher heat
settings or during colder weather, you
must use larger tanks.
The amount of propane gas ready for use
from propane tanks varies. Two factors
determine this amount.
1. The amount of propane gas in
tank(s)
2. The temperature of tank(s)
The chart below shows the minimum
number of 100-pound tanks needed to
run the heater. Connect tanks together
with a manifold (available from propane
supplier.
Average Temperature (ºF) Number of
at Tank Location Tanks (100-lbs)
60° 1
40° 1
32° 1
20° 1
10° 2
0° 2
Ventilation
Provide at least a
2.5-square-foot
opening of fresh, outside air while
running heater. If proper fresh, outside
air ventilation is not provided, carbon
monoxide poisoning can occur. Provide
proper fresh, outside air ventilation
before running heater.
Installation
Review and
understand the
warnings in the General Safety Infor-
mation section. They are needed to
safely operate this heater. Follow all
local codes when using this heater.
Test all gas piping
and connections
for leaks after installation or servicing.
Never use an open flame to check for a
leak. Apply a mixture of liquid soap and
water to all joints. Bubbles forming
show a leak. Correct all leaks at once.
Figure 3 - Regulator with Vent Pointing
Down
Figure 4 - Hose and Valve Inlet
1. Provide propane supply system (See
Propane Supply).
2. Connect fuel gas fitting on hose/
regulator assembly to propane tank(s).
Turn fuel gas fitting counterclockwise
into threads on tank. Tighten firmly
using a wrench.
IMPORTANT: Tighten regulator with vent
pointing down. Pointing vent down
protects regulator from weather damage.
Less gas is vaporized at lower tempera-
tures. Your local propane gas dealer will
help you select the proper supply system.
Hose
Valve Inlet
Propane
Tank
Supply
Valve
Fuel Gas
Fitting
Hose
Regulator
Vent
(pointing
down)
3. Connect hose to the valve inlet.
Tighten firmly using a wrench. You
must use the regulator supplied with
heater even if propane tank has one.
4. Open propane supply valve on propane
tank(s) slowly.
NOTE: If not opened slowly, excess-flow
check valve on propane tank may stop gas
flow. If this happens, you may hear a click
inside the regulator assembly. This is the
check valve closing. To reset the excess-
flow check valve, close propane supply
valve and open it again slowly.
5. Check all connections for leaks.
6. Close propane supply valve.
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