LAARS Mighty Therm2 MT2P (Sizes 500–2000 MBTU/h) - Install and Operating Manual - Manual (Page 4)

LAARS Heating Systems Page 4
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
N = Pump mounted, TACO, normal water pump
B = Pump mounted, B&G, optional normal 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
(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 Figure 1.
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.
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 MT2P must be located
as close as practical to a chimney or outside wall.
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 should be
installed at an appropriate level above grade.
The dimensions and requirements that are shown
in Table 2 should be met when choosing the locations
for the appliance.
1.6 Locating Heater with Respect to Pool
System Loop
For the best results, the MT2P should be located
within 15 feet (4.6m) of the pool system loop. The
pump is sized for 30 feet (9.1m) of piping.
If the appliance must be installed with longer
piping runs, then larger diameter piping shall be used.
Consult the factory for assistance.
1.7 Locating Appliance for Correct
Horizontal Vent/Ducted Air Distance
From Outside Wall
The forced draft combustion air blower/blowers
VENT HORIZONTAL AIR COLLAR
HEATER COLLAR VENT PIPE & PIPE MAX. PIPE MAX. NO. SIDE WALL SIDE WALL
SIZE SIZE DIAMETER* DIAMETER LENGTH OF ELBOWS VENT COMBUSTION
TERMINAL AIR TERMINAL
in. cm in. cm in cm ft. m PART NUMBER PART NUMBER
500 8 20 6 15 6 15 50 15 3 CA001401 20260701
750 10 25 8 20 6 15 50 15 3 CA001401 20260701
1000 10 25 8 20 8 20 50 15 3 CA001402 20260703
1250 12 30 8 20 8 20 50 15 3 CA001403 20260703
1500 12 30 8 20 8 20 50 15 3 CA001403 20260703
1750 12 30 8 20 8 20 50 15 3 CA001403 20260703
2000 14 36 12 30 12 30 50 15 3 CA001404 20260706
*Horizontal venting requires stainless vent pipe. See Table 5.
Table 1. Horizontal Vent / Combustion Air Parameters.