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Mr. Heater | Unvented Natural Gas Fired Room Heater
Operating Instructions and Owner’s Manual
NEVER LEAVE THE HEATER UNATTENDED WHILE BURNING!
NEVER LEAVE THE HEATER UNATTENDED WHILE BURNING!
NEVER LEAVE THE HEATER UNATTENDED WHILE BURNING!
Connecting to Gas Supply
Installation must include an equipment
shutoff valve, union and plugged 1/8”
NPT tap. Locate NPT tap within reach
of test gauge hookup. NPT tap must be
upstream from heater. See Figure 12.
*A CSA/AGA certified equipment
shutoff valve with 1/8” NPT tap is an
acceptable alternative to test gauge
connection. Purchase the CSA/AGA
certified equipment shutoff valve from
your dealer.
IMPORTANT:
Install an equipment
shutoff valve in an accessible location.
The equipment shutoff valve is for
turning on or shutting off the gas to
the appliance.
Apply pipe joint sealant lightly to male
threads. This will prevent excess sealant
from going into pipe. Excess sealant in
pipe could result in clogged heater fuel
train.
Install sediment trap in supply line as
shown in Figure 12. Locate sediment
trap where it is within reach for
cleaning. A sediment trap traps
moisture and contaminants. This
keeps them from going into heater.
If sediment trap is not installed or is
installed improperly, heater may not
run correctly.
IMPORTANT:
Hold pressure regulator
with wrench when connecting it to gas
piping and/or fittings.
PRESSURE TESTING GAS SUPPLY
PIPING SYSTEM
High Pressure
Test pressure in Excess of ½ psig
(3.5kPa)
1. The appliance and its appliance main
gas valve must be disconnected from
the gas supply piping system during
any pressure testing of that system at
test pressures in excess of ½ psi (3.5
kPa).
INST
ALLATION
WARNING:
A qualified service
person must connect heater to gas
supply. Follow all local codes.
WARNING: This appliance requires
a 3/8” NPT (National Pipe Thread) inlet
connection to the pressure regulator.
Use of floor mounting feet will require
you to use a 3/8 NPT street elbow to
make gas connection.
WARNING:
Test all gas piping and
connections for leaks after installing or
servicing. Correct all leaks at once.
WARNING: Never use an open flame
to check for a gas leak. Apply a mixture
of liquid soap and water to all joints.
Bubbles forming show a leak. Correct
all leaks at once.
CAUTION:
Never connect heater
to private (nonutility) gas well. This gas
is commonly known as wellhead gas.
IMPORTANT: Check your gas line
pressure before connecting heater
to gas line. Gas line pressure must be
no greater than 14 inches of water.
If gas line pressure is higher, heater
regulator damage could occur.
CAUTION: Use only new black iron
or steel pipe. Internally-tinned copper
tubing may be used in certain areas.
Check your local codes. Use pipe
of large enough diameter to allow
proper gas volume to heater. If pipe
is too small, undue loss of pressure
will occur.
Figure 12
Nipple
Tee Joint
Cap
Shutoff Valve
HEATER CABINET
Nipple
Nipple
Tee Joint
Ground Joint Union
3/8” NPT Pipe Nipple
Pressure
Regulator
Test Gauge
Connection
1/8” NPT Plug Tap
Reducer Bushing
to 1/8” NPT
Nipple
Sediment
Trap
3” minimum
Fuel line from
Gas Meter
(7”W.C to 14” WC Pressure)
CAUTION:
Use pipe joint sealant
that is resistant to Natural Gas.
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 the propane/LP supply tank
valve.
4. Check all connections and joints in gas
supply piping system. Apply mixture
of liquid soap and water to gas joints.
Bubbles forming show a leak.
5. Correct all leaks at once.
6. Depressurize and relieve pressure in
supply piping system.
7. Reconnect heater and equipment
shutoff valve to gas supply.
8. Reconnected fittings must be checked
for leaks in next section.
