10
105717
VENT-FREE NATURAL GAS HEATER
MBN10LA AND MBN6LA
™
CHECKING GAS
CONNECTIONS
WARNING: Test all gas pip-
ing and connections for leaks
after installing or servicing. Cor-
rect all leaks at once.
WARNING: 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.
Pressure Testing Gas Supply
Piping System
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1.
Disconnect appliance with its appliance
main gas valve (control valve) and equip-
ment shutoff valve from gas supply pip-
ing system. Pressures in excess of 1/2 psig
will damage heater regulator.
2.
Cap off open end of gas pipe where
equipment shutoff valve was connected.
3.
Pressurize supply piping system by either
using compressed air or opening main gas
valve located on or near gas meter.
4.
Check all joints of gas supply piping
system. Apply mixture of liquid soap
and water to gas joints. Bubbles form-
ing show a leak.
5.
Correct all leaks at once.
6.
Reconnect heater and equipment
shutoff valve to gas supply. Check re-
connected fittings for leaks.
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1.
Close equipment shutoff valve (see Fig-
ure 13).
2.
Pressurize supply piping system by either
using compressed air or opening main gas
valve located on or near gas meter.
3.
Check all joints from gas meter to equip-
ment shutoff valve (see Figure 14). Ap-
ply mixture of liquid soap and water to
gas joints. Bubbles forming show a leak.
4.
Correct all leaks at once.
Pressure Testing Heater Gas
Connections
1.
Open equipment shutoff valve (see Fig-
ure 13).
2.
Open main gas valve located on or near
gas meter.
3.
Make sure control knob of heater is in
the OFF position.
4.
Check all joints from equipment shutoff
valve to control valve (see Figure 14).
Apply mixture of liquid soap and wa-
ter to gas joints. Bubbles forming show
a leak.
5.
Correct all leaks at once.
6.
Light heater (see Operating Heater).
Check the rest of the internal joints for
leaks.
7.
Turn off heater (see To Turn Off Gas to
Appliance, page 11).
8.
Replace front panel.
ON
POSIT
PO
Figure 13 - Equipment Shutoff Valve
Equipment
Shutoff
Valve
Open
Closed
Control Valve Location
Gas Meter
Equipment Shutoff Valve
Figure 14 - Checking Gas Joints
OPERATING
HEATER
FOR YOUR SAFETY
READ BEFORE
LIGHTING
A. This appliance has a pilot which must
be lighted by hand. When lighting the
pilot, follow these instructions exactly.
B. BEFORE LIGHTING smell all
around the appliance area for gas. Be
sure to smell next to the floor because
some gas is heavier than air and will
settle on the floor.
WHAT TO DO IF YOU SMELL
GAS
• Do not try to light any appliance.
• Do not touch any electric switch; do
not use any phone in your building.
• Immediately call your gas supplier
from a neighbor’s phone. Follow
the gas supplier’s instructions.
• If you cannot reach your gas sup-
plier, call the fire department.
C. Use only your hand to push in or turn
the gas control knob. Never use tools.
If the knob will not push in or turn
by hand, don’t try to repair it, call a
qualified service technician or gas
supplier. Force or attempted repair
may result in a fire or explosion.
D. Do not use this appliance if any part
has been under water. Immediately
call a qualified service technician to
inspect the appliance and to replace
any part of the control system and
any gas control which has been un-
der water.
WARNING: If you do not fol-
low these instructions exactly, a
fire or explosion may result caus-
ing property damage, personal
injury or loss of life.
INSTALLATION
Continued
