Boiler Supply Connections, Filling the Heater

qDo not apply heat directly to the cold-water inlet as it is made of plastic and will melt.

G. BOILER SUPPLY CONNECTIONS

qWARNING: 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.

qAll water supply fittings on this heater are brass – do not over tighten or strip threads.

qIt is recommended to use a union as per Figures 1 and 2.

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

q Check that the temperature-and-pressure relief valve has been properly installed (mandatory requirement).

q Completely close the drain valve.

q Open the highest hot water faucet to allow air to escape from piping.

q 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.TPI THERMOSTAT INSTALLATION

q Attaching TPI Thermostat to tank:

Place hole in back of TPI thermostat over immersion well. TPI thermostat should fit flush against the tank without immersion well protruding beyond cover of TPI case. Use self-tapping screw provided (Screw A) to attach TPI directly to the Alliance SL tank. (See TPI Diagram 2)

q Inserting the Temperature Sensor:

Slide temperature sensor all the way into the immersion well – until it contacts the end.

(See TPI Diagram 2)

q The sensor will measure temperature adequately by resting against the bottom of the immersion well.

(Note: Sensor does NOT need to make intimate contact with entire well surface to work properly)

CAUTION: Sensor is soldered directly to TPI. DO NOT BEND SHARPLY OR OVERWORK.

J.TPI WIRING CONTROLS

NOTE: THE TPI CONTROL ELECTRONICS MUST BE POWERED WITH 24VAC.

q Incoming 24VAC power must be connected to 24VAC connectors on the bottom right corner of TPI Thermostat. (See TPI Diagram 3)

q The TPI 24VAC only requires 20mA, or about 0.5 Watts.

q Connect control wiring to PUMP/TT normally open relay connections (rated for both 24V and 110V wiring) on the bottom left corner of TPI control. (See TPI Diagram 3)

q TPI Wiring will vary depending on the type of boiler and valve controls in the system. Consult attached Wiring Diagrams for appropriate wiring configuration for your system.

q The Alliance SL water heater may operate as a separate heating zone using either the heating system circulator and an appropriate zone valve, or a separate circulator dedicated for water heating. (See Figure 1 & 2).

q In both systems, the Alliance SL is controlled through the TPI thermostat on the heater.

(See Figures 1 & 2).

q TPI thermostat calls for the heat when the temperature in the tank is below the set point (120°F) and either activates a circulator or zone valve depending upon installation design.