Laars MIGHTY THERM2, Assembly, Installation And Operation Instructions

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LAARS Heating Systems
Page 4
1.2 Model Identification
Consult the rating plate on the unit. The following
information describes the model number structure.
1-3 Model Series Designation
M T 2 = Mighty Therm2
4 Usage
H = Hydronic
V = Volume Water
5-8 Size
0 5 0 0 = 500,000 BTU/h input
0 7 5 0 = 750,000 BTU/h input
1 0 0 0 = 999,000 BTU/h input
1 2 5 0 = 1,250,000 BTU/h input
1 5 0 0 = 1,500,000 BTU/h input
1 7 5 0 = 1,750,000 BTU/h input
2 0 0 0 = 1,999,000 BTU/h input
9 Fuel
N = Natural Gas
P = Propane
10 Altitude
A = 0–10,000 feet
11 Location
C = Indoor and Outdoor
12 Firing Mode
K = Two-stage
13 Revision
1 = First version of design
14 Heat Exchanger
B = Glass-lined cast iron / copper / bronze trim
(std. on water heaters)
C = Glass-lined cast iron / copper
(std. on boilers, n/a on water heaters)
N = Glass-lined cast iron / cupro-nickel
(n/a on water heaters)
P = Glass-lined cast iron / cu-nickel / bronze trim
15 Option Code
X = Standard unit
J = CSD-1, FM, IRI, IL
16 Pump Options
X = No Pump
H = Pump mounted MT2V, TACO, hard water pump
N = Pump mounted (any), TACO, normal water pump
S = Pump mounted MT2V, TACO, soft water pump
C = Pump mounted MT2V, B&G, hard water pump
B = Pump mounted (any), B&G, normal water pump
D = Pump mounted MT2V, B&G, soft water pump
1.3 Warranty
Laars Heating Systems appliances are covered by a
limited warranty. Owners should submit online warranty
registration at
www.Laars.com
.
All warranty claims must be made to an authorized
Laars Heating Systems representative, directly to
Customer Service, or online at
www.Laars.com
. Claims
must include the serial number and model number (this
information can be found on the rating plate), installation
date, and name of the installer. Shipping costs are not
included in the warranty coverage.
Some accessory items are shipped in separate
packages. Verify receipt of all packages listed on the
packing slip. Inspect everything for damage immediately
upon delivery, and advise the carrier of any shortages
or damage. Any such claims should be filed with the
carrier. The carrier, not the shipper, is responsible for
shortages and damage to the shipment whether visible or
concealed.
1.4 Dimensions
See Figures 1 and 2.
1.5 Locating the Appliance
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 or to 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 installation on combustible flooring;
in basements; in closets, utility rooms or alcoves .
Mighty Therm2 Boilers or Water Heaters must
never be installed on carpeting. The location for the
appliance should be chosen with regard to the vent
pipe lengths and external plumbing. 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.). When vented vertically, the
Mighty Therm2 must be located as close as practical
to a chimney or outside wall. If the vent terminal and/
REQUIRED RECOMMENDED
APPLIANCE CLEARANCE FROM SERVICE ACCESS
SURFACE COMBUSTIBLE MATERIAL CLEARANCE
inches cm inches cm
Left Side 1 2.5 24 61
Right Side 1 2.5 24 61
Top 1 2.5 12 30
Back 1 2.5 ** 12** 30**
Front 1 2.5 36 91
Vertical
(Category 1) 6* 15.2*
Vent
Horizontal per UL1738 venting
(Category 3) system supplier’s
Vent instructions
*1" (2.5cm) when b-vent is used.
**When vent and/or combustion air connects to the back,
recommended clearance is 36" (91cm).
Table 1. Clearances.