Installation / Operation Instruction Manual

Page 13
Brute Mini
100-200'
30-60m
3/4 1 1 1 1-1/4 1-1/4
*Note: These gures are for Natural Gas (.65 Sp. Gr.), and
are based on 1/2" water column pressure drop. Check supply
pressure with a manometer, and local code requirements for
variations. For LPG, reduce pipe diameter one size, but main-
tain a 1/2" minimum diameter. A 'normal' number of Tees and
elbows have been taken into allowance.
Table 6. Natural Gas Pipe Size Requirements*
Gas Supply
Inlet
Tee
Fitting
3 in.
(76mm) Min.
Cap
Nipple
To Equipment
Inlet
Figure 9. Typical design for a sediment trap/drip leg.
4. A sediment trap (drip leg) must be installed
ahead of the gas controls (see Figure 8). Fit the
trap with a threaded cap which can be removed
for cleaning.
5. Install a manual gas shutoff valve for service and
safety. Do not use a restrictive gas cock. Flexible
gas connectors, if used, must be CSA rated for
the total input rating of the boiler.
6. Disconnect the boiler and its individual shutoff
valve from the gas supply system during pressure
testing of the system at pressures higher than 1/2
pounds per square inch (psi) (3.45 kilopascals
[kPa]). If the test pressure is equal to or less than
1/2 psi (3.45 kPa), close the manual shutoff valve
on the heater during the piping pressure test.
7. If the gas supply pressure is less than required,
check for undersized pipe between the meter and
the boiler, a restrictive tting, or an undersized
gas meter. Gas supply pressures to the heater are
listed in Table 5.
NOTE: The maximum inlet gas pressure must not
exceed the specied value. The minimum value
listed is for the purpose of input adjustment.
Refer to Table 5.
NOTE: The boiler and all other gas appliances sharing
the boiler gas supply line must be ring at
maximum capacity to properly measure the
inlet supply pressure. Low gas pressure could
be an indication of an undersize gas meter
and/or obstructed gas supply line.
8. The correct high re burner manifold gas
pressure is stamped on the rating plate. The
regulator is pre-set at the factory, and normally
requires no further adjustment. For two-stage
units (100-225) be sure the unit is able to re at
both high and low re.
9. Before operating the boiler, the complete gas
supply system and all connections must be tested
for leaks using a leak detector solution. Do not
use an open ame.
Caution
Some leak test solutions (including soap and
water) may cause corrosion or stress cracking.
Rinse the piping with water after testing.
Attention
Certaines solultions d’essai d’étanchéité (y
compris l’eau et le savon) peuvent causer de
la corrosion ou de la ssuration. Rincez les
tuyaux à l’eau apprès l’essai d’étanchéité.
4B Special Precautions for LP Gas
LP Gas is heavier than air and can therefore more
readily collect or “pool” in enclosed areas if provision
for proper ventilation is not made. Be sure to pay
special attention to proper ventilation for LP gas.
Locate boilers a safe distance from LP gas cylinders
and lling equipment. In the United States, consult
the “National Fuel Gas Code” (NFPA 54 / ANSI
Z223.1, latest edition) or in Canada, the Propane
Installation Code (CSA-B149.1), any local codes and
re protection authorities about specic installation
restrictions in your area.