LAARS SUMMIT SMW-250 - Install and Operating Manual - Manual (Page 11)

SUMMIT BOILER OR WATER HEATER Page 11
system resulting from the piping sliding in the
hangers. It is recommended that padding be used
when rigid hangers are installed.
Installing Tank & Piping
The SMW-200/250 can be used with several
different types of readily available storage tanks. A
bronze circulating pump is built into the water heater.
The pump draws water from the storage tank and
pumps the water through the heater and back into the
tank.
Position the Storage Tank(s)
At the previously selected locations, position the
storage tank(s). Use Table 3 to determine the pipe size
necessary to provide adequate flow between the
SMW-200/250 and the tank(s).
Hot Water Outlet Piping, Fittings, and
Accessories
1. Begin piping to the tank from the hot water
outlet at the top of the SMW-200/250 cabinet.
2. Pipe the outlet from the relief valve (located on
top of the appliance) such that any discharge
from the relief valve will be conducted to a
suitable place for disposal when relief occurs.
Do not reduce line size or install any valves in
this line. The line must be installed to allow
complete drainage of both the valve and the line.
3. Install a shut off valve in the piping between the
thermometer fitting and the tank.
Cold Water Supply Piping, Fittings and
Accessories
1. Install a strainer between the SMW 200/250 and
the system. For proper pipe size and distance
limitations, refer to Table 3.
2. Connect a drain valve and a shut off valve to the
SMW-200/250 cold inlet. On multiple
appliances install a check valve at each
appliance’s cold water inlet.
3. Where check valves have been installed on cold
water inlet piping, check to be sure system has
an adequately sized expansion tank to allow
thermal expansion to occur.
Figure 11. Wiring Diagram.