Laars Mighty Max VW Series, Installation, Operation And Maintenance Instructions

Page: 5 / 32

Mighty Max Volume Water Heater
Page 5
Distance from Gas Meter or Last Stage Regulator
0-100 feet 100-200 feet 200-300 feet
0-30m 30-60m 60-90m
Natural Propane Natural Propane Natural Propane
Size in. mm in. mm in. mm in. mm in. mm in. mm
320M
400M
520M
625M
775M
1000M
1.25
1.25
1.50
1.50
2.00
2.00
32
32
38
38
51
51
1.25
1.25
1.25
1.25
1.50
1.50
32
32
32
32
38
38
1.50
1.50
2.00
2.00
2.00
2.50
38
38
51
51
51
64
1.25
1.25
1.50
1.50
1.50
2.00
32
32
38
38
38
51
1.50
2.00
2.00
2.00
2.50
3.00
38
51
51
51
64
76
1.50
1.50
1.50
2.00
2.00
2.50
38
38
38
51
51
64
Figure 3. Heater Gas Valve Arrangement.
Notes: 1. These numbers are based on 1/2 inch (13mm) water column pressure drop.
2. Check supply pressure and local code requirements before proceeding with work.
3. Pipe fittings must be considered when determining gas pipe sizing.
Table 3. Natural Gas and Propane, Pipe Size Requirements.
NOTE: The above diagram is a representation, actual venturi assembly may vary depending upon heater size.
SIZES:
320M, 400M
SIZES:
520M, 625M
SIZES:
775M, 1000M
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