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108978-03 - 1/23
Alliance SL
Installation, Operating & Service Instructions
G. BOILER SUPPLY CONNECTIONS
•
WARNING: Boiler temperature must be controlled by the boiler high limit not to exceed 200°.
Failure to do so will create a hazardous installation and void the applicable limited warranties.
• All water supply fittings on this heater are brass – do not over tighten or strip threads.
• It is recommended to use a union as per Figures 1 and 2.
• Connect the supply line (from the boiler) to the “Hx In” fittings of the heat exchanger. Connect the
return line (back to the boiler) to the “Hx Out” fittings.
• For closed-loop systems that do not use water as the heat-transfer fluid, the total volume of the
heat-transfer fluid in the closed loop shall be less than 10% of storage tank volume.
Max Loop length = (tank capacity/100 / (PI * pipe radius * pipe radius)
NOTE: Be sure to connect Boiler Supply Line (from the boiler) to the “HX in” fitting and Boiler
Return Line (to the boiler) to the “HX Out” fitting.
H. FILLING THE HEATER
• Check that the temperature-and-pressure relief valve has been properly installed (mandatory
requirement).
• Completely close the drain valve.
• Open the highest hot water faucet to allow air to escape from piping.
• Open the valve to the cold-water inlet and allow the heater and piping system to completely fill, as
indicated by a steady flow of water from the open faucet.
I. THERMOSTAT INSTALLATION
•
Attaching Thermostat to tank:
Place hole in back of Thermostat over the temperature sensor leads. It should fit flush against the
tank. Use the provided self-tapping screw
(Screw A)
to attach case back directly to the Alliance LT
(see Thermostat Diagram 1)
.
• Connect temperature sensor wires to press release connector (if equipped). (See Thermostat
Diagram 4).
• Run all 24Vac wiring thru the square notch on bottom of thermostat case.
(See Thermostat
Diagram 3). (Note: Sensor does NOT need to make intimate contact with entire well surface to
work properly).
• The Alliance LT may operate as a separate heating zone using either the heating system
circulator and an appropriate zone valve, or a separate circular dedicated for water heating.
(See
Figure 1 & 2).
• In both systems, the Alliance LT is controlled through the thermostat on the heater.
(See
Figures 1 & 2).
• Be certain to replace thermostat cover using Black Screw provided.
J. TPI WIRING CONTROLS
NOTE: THE TPI THERMOSTAT MUST BE POWERED WITH 24VAC.
• 24 VAC power must be connected to 24 VAC connectors on the bottom right corner of TPI
(See TPI Diagram 3)
• The TPI 24 VAC only requires 20mA, or about 0.5 Watts.
• Connect control wiring to PUMP/TT normally open relay connections (rated for both 24V and 110V
wiring) on the bottom left corner of TPI.
(See Thermostat Diagram 2).
• All and only 110 VAC wiring must go through an appropriate chase nipple installed in the knockout
at bottom of TPI case.
3
Installation Guidelines
(continued)
