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Dayton Operating Instructions and Parts Manual
4
Dayton Natural Gas
Construction Heater
®
3VH19
Natural Gas Supply
The user must furnish the natural gas
supply and the connections to the heater.
Regulate the natural gas supply down
from a minimum 6 inches water column to
a maximum of 1/2 PSI. The natural gas
supply capacity should be able to supply a
minimum of 100 cubic feet of gas at
pressure for each heater connected to the
system.
Consult your natural gas supplier for
proper sizing of the natural gas supply
lines.
Follow all local ordinances and codes. In
the absence of local ordinances and codes,
refer to the National Fuel Gas Code
Handbook, NFPA54/ANSI Z223.1 and the
Natural gas Installation Code, CAN/CGA
B149.2.
Ventilation
Provide at least a
3-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 Safety Information
Section, page 2. 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.
1. Provide natural gas supply system.
2. Install plumbing to a low pressure
natural gas source. The source must be
regulated to 1/2 PSI maximum. The
plumbing must be a minimum 3/4 inch
i.d. hose or flexible connector not over
10 feet long.
3. Connect the hose to the heater at the
1/2 inch SAE flare fitting at the valve
inlet. Tighten all fittings with a wrench.
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 that must be
corrected. Correct all leaks at once.
FRESH OUTSIDE AIR OPENING REQUIREMENTS
Heater Size Square feet opening
100,000 Btu/Hr 3.0
Figure 3 - Hose and Valve Inlet
Hose
Flare
Fitting
4. Open natural gas supply valve slowly.
5. Check all connections for leaks.
6. Close natural gas supply valve.
TO START HEATER
1. Follow all installation, ventilation, and
safety information.
2. Locate heater on stable and level
surface. Make sure strong drafts do
not blow on heater.
3. Open gas supply slowly.
4. Turn control valve knob 1/4 turn to left
to PILOT Position (see Figure 4).
Operation
Review and
understand the
warnings in the Safety Information
Section. They are needed to safely
operate this heater. Follow all local
codes when using this heater.
ON
FROM “PILOT” POSITION
SLIGHT PUSH TO
TURN OFF
FULL PUSH TO
LIGHT
OFF
PILOT
OFFON
5. Push and hold in control valve knob
while pushing red piezo ignitor button.
Ignitor may have to be pushed again (3
to 8 times) until pilot lights.
NOTE: If hose is filled with air, allow 20
seconds for gas to reach pilot before
pushing ignitor button.
6. After pilot lights, keep control valve
knob depressed for at least 30
seconds, then release.
7. If pilot light goes out, repeat steps 4
through 6.
Figure 4 - PILOT Position