lp-181 Rev. 3.3.15
7
G. Application
Figure 3 - Typical Storage Tank Installation
PIPING NOTES:
1. Check valves are optional. Circulators may have Internal
Flow Checks (IFCs).
2. If a backflow preventer or no return valve is installed a
thermal expansion tank suitable for potable water must be
sized and installed on the cold water inlet between the storage
tank and the backflow preventer.
Part 4 - Control and Wiring
A. Control
A pre-wired surface mount thermostatic control is provided
on your storage tank. Temperature may be set by removing
lower cover screw and lower cover. has been provided for
accurate temperature adjustment.
B. Wiring
Wiring is to be done in accordance with all applicable local
and state codes. Turn off all power related to the water
heating system before starting any wiring procedures. It is
recommended that a disconnect switch be installed between
the boiler control and storage tank.
When wiring the boiler and controls be sure to label all wires
to ease future maintenance. Wiring errors can cause improper
and dangerous operation.
C. Wiring Diagram
Figure 4 - Wiring the Control
1. Fill the storage tank by opening the cold water shut-off valve.
Make certain any drain valves are completely closed. Purge air
from the system by opening a hot water outlet at a fixture in a
kitchen or bathroom. When water flows freely from the outlet,
the system is purged.
Part 5 - Start-Up and Operation
When filling the storage tank, open a hot water tap to release air
in the tank and piping to ensure proper storage tank operation.
Failure to ensure the storage tank is full before turning on the
system could result in damage to the water heating system
and property damage. Such damages ARE NOT covered by
warranty.
2. Check the system for leaks.
Fix any leaks before continuing the installation. Failure to do so
could result in property damage or personal injury.
3. After ensuring there are no leaks within the system, flush the
system to clear any soldering residue.
Draw at least three times the volume of the storage tank to
properly flush the system.
4. Initiate a call for hot water. Ensure each zone valve or circulator
operates only when its thermostat calls for heat. Purge each
zone of air to ensure proper operation.
5. Set the storage tank to the desired temperature. Boiler high
limit should be set at least 20
o
F higher than the storage tank
temperature setting. Set the low limit of the boiler control at the
minimum setting - this will call the burner on only to satisfy the
tank control.
A storage tank temperature setting of 120
o
F is recommended.
However, a lower temperature setting may be required to comply
with local and state codes for normal operation. Installation
conditions may require a higher or lower temperature setting.
A mixing valve in conjunction with a high temperature setting
may be used for high demand applications (spas, hot tubs,
whirlpools).
6. When the system is completely flushed, purged of air, and the
temperature is set, turn on the water heating system. Observe
operation. Ensure the boiler shuts down after the storage tank
set point is satisfied.
