Enerco HSBF10LP, Installation Instructions And Owner'S Manual, Page: 8 / 24

8
Installation Instructions and Owner’s Manual Unvented Liquid Propane Fired Room Heater
(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.
CAUTION: Never connect heater directly to the Propane
supply. This heater requires an external regulator (not
supplied). Install the external regulator between the
heater and Propane/LP supply.
The installer must supply an external regulator. The ex -
ternal regulator will reduce the incoming gas pressure
to between 11 and 14 inches of water. If you do not
reduce incoming gas pressure heater regulator dam -
age could occur. Install external regulator with the vent
pointing down as shown in Figure 12. Pointing the vent
down protects it from freezing rain or sleet.
CAUTION: Use only new black iron or steel pipe.
Internally-tinned copper tubing may be used in cer -
tain areas. Check your local codes. Use pipe of larger
enough diameter to allow proper gas volume to heater.
If pipe is too small, undue loss of pressure will occur.
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).
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. See Accessories, page
17.
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.
CAUTION: Use pipe joint sealant that is resistant to
LP-Gas .
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 con -
taminants. 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.
CHECKING GAS CONNECTIONS
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.
PRESSURE TESTING GAS SUPPLY PIPING
SYSTEM
Test pressure in Excess of ½ psig (3.5kPa)
1. Disconnect appliance with its appliance main
gas valve (control valve) and equipment shutoff
valve from gas supply piping system. Pressures
in excess of ½ psig will damage heater regula -
tor.
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 on
or near gas meter.
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.
Test Pressure Equal To or Less Than ½ psig (3.5
kPa)
1. Close equipment shutoff valve (see figure 13).
2. Pressurize supply piping system by either using
compressed air or opening propne/LP supply
valve.
3. Check all joints from the propane/LP supply
valve to equipment shutoff valve (see figure
14). Apply mixture of liquid soap and water to
gas joints. Bubbles forming show a leak.
4. Correct all leaks at once.
5. Depressurize and relieve pressure from supply
piping system.
Pressure
Regulator
Heater
Cabinet
Ground Joint Union
Equipment
Shutoff Valve
From Gas Meter
(4” W.C. to 10.5”
W.C. Pressure)
Tee Joint
1/8” NPT Plug Tap
Cap
Pipe Nipple
Tee Joint
3/8” NPT Pipe Nipple
Sediment
Trap
Test Gauge
Connection
Reducer Bushing
to 1/8” NPT
3” Minimum