LAARS Mighty Max HH (Sizes 320M - 1000M) - Installation, Operation and Maintenance Instructions - Manual (Page 7)

Mighty Max Hydronic Boiler Page 7
Figure 4. T-Fitting Sediment Trap Installation.
Gas Supply
Inlet
Tee
Fitting
3 In.
(76mm) Min.
Cap
Nipple
To Equipment
Inlet
SIZES:
320M, 400M
SIZES:
520M, 625M
SIZES:
775M, 1000M
Figure 3. Boiler Gas Valve Arrangement.
Note: The above diagram is a representation. Actual venturi assembly may vary depending on boiler size.
Venturi
Air Shutter
Enclosure
Automatic,
Regulator
and
Redundant
Gas Valve
Mixture
Plenum
Mixture
Plenum
Filter
Housing
Blower
Motor
Air Shutter
Enclosure
Filter
Housing
Venturi
Automatic
and
Redundant
Gas Valve
Mixture
Plenum
Blower
Motor
Regulator
Manual Gas
Valves When
Used On
Canadian Unit
or U.S.Unit
Requiring
CSD-1 Code
Air Shutter
Enclosure Filter
Housing
Blower
Motor
Regulator
Venturi
Manual Gas
Valves When
Used On
Canadian Unit
or U.S.Unit
Requiring
CSD-1 Code
Automatic
Main
Gas Valves
NOTE: The boiler and all other gas appliances
sharing the boiler gas supply line must be firing 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. Do not exceed the maximum inlet gas pressures
specified. Excessive pressure will result in
damage to the heater's gas controls. The
minimum pressures specified are for gas input
adjustment.
9. The correct differential gas pressure is stamped
on the rating plate. The regulator is preset at the
factory, but may need adjustment for altitude per
Section 3.
10. Before operating the heater, test the complete
gas supply system and all connections for leaks
using a soap solution.
Caution
Since some leak test solutions (including soap
and water) may cause corrosion or stress
cracking, rinse the piping with water after
testing.