Locating The Appliance; Correct Vent Distance From Outside Wall Or Roof Termination - Laars MASCOT LX Installation And Operation Instructions Manual

Mascot LX Boilers and Water Heaters
SECTION 2.

Locating the Appliance

2.1 Locating the Appliance
The Mascot LX is designed for indoor
wall-mounted installations only.
The Mascot LX must be mounted to a suitable wall by
a qualified heating contractor under the guidelines of a
wall mounted boiler or combination unit. Use a suitable
wall, either concrete or wood and use the appropriate
fasteners for that wall. Failure to wall mount this boiler
using correct fasteners will affect the performance and
life expectancy of the boiler and will void the warranty.
The appliance should be located to provide clearances
on all sides for maintenance and inspection. It should
not be located in an area where leakage of any
connections will result in damage to the area adjacent to
the appliance, the wall that it is hung on, or to the lower
floors of the structure.
When such a location is not available, it is recommended
that a suitable drain pan, adequately drained, be installed
under the appliance.
The appliance is design certified by CSA-International
for wall-mounted installation in basements; in closets,
utility rooms or alcoves. The location for the appliance
should be chosen with regard to the vent pipe lengths
and external plumbing and on a plumb (vertical) wall.
The unit shall be installed such that the gas ignition
system components are protected from water (dripping,
spraying, rain, etc.) during operation and service
(circulator replacement, control replacement, etc.).
If the vent terminal and/or combustion air terminal
terminate through a wall, and there is potential for snow
accumulation in the local area, both terminals must
be installed at an appropriate level above grade or the
maximum expected snow line.
The dimensions and requirements that are shown in
Table 3 should be met when choosing the locations for
the appliance.
2.2 Correct Vent Distance from Outside
Wall or Roof Termination
The forced draft combustion air blower in the appliance
has sufficient power to vent properly when the
guidelines in Table 4 are followed.
For concentric vent terminal kit (optional), follow
installation instructions included with the kit.
Sizing Data
Model
MLX 50
MLX 75
100 100,000 29.3
MLX
MLX 125 125,000 36.6
MLX 150 150,000 43.9
MLX 175 175,000 51.6
MLX 220 220,000 64.4
NOTES:
1. For other boiler ratings:
Boiler Horsepower: HP = Output
Sizing Data,
Piping
Figure 7. Locating the Appliance.
APPLIANCE
Clearances
SURFACE
Left Side
Right Side
Top
Closet, Front
Front
Bottom
Vent
Table 3.
NOTE: When located on the same wall, the Minimum
Venting Distance is found on
12
30
Input Output
BTU/h kW BTU/h
50,000 47,500
14.6 13.2
75,000 71,250
21.9 20.8
95,000
27.8
118,750 34.8
142,500 41.8
166,250 48.7
209,000 61.2
Radiation Surface: EDR sq. ft. = Output
33,475
Cond. Hydronic
Outlet Return
3/4"
50 thru 125
PVC copper
3/4"
150 - 220
PVC
SUGGESTED SERVICE ACCESS CLEARANCE
INCHES
Certifi ed by CSA for zero clearance to
combustible materials on all sides.
Clearances
Figure
Page 7
DHW AFUE Gas
Output @ Conn. Size Conn
kW 75°F Rise inches
- 95% 1/2" NPT
- 95% 1/2" NPT
- 95% 1/2" NPT
3.1 gpm 95% 1/2" NPT
3.7 gpm 95% 1/2" NPT
4.3 gpm 95% 1/2" NPT
- 95% 1/2" NPT
150
DHW 2nd
Inlet Return
3/4" 1/2" 3/4"
NPT copper
1" 1/2" 3/4"
NPT NPT copper
CM
6
15
6 15
12
30
6 15
24
61
24 61
1
3
11.
Wa
inch
3/4"
3/4"
3/4"
3/4"
1" N
1" N
1" N
Gas
Supply
1/2"
NPT
1/2"
NPT