5
G. BOILER SUPPLY CONNECTIONS
WARNING: Heat exchanger fluid must be non-toxic.
WARNING: Boiler temperature must be controlled by the
boiler hi limit not to exceed 200°. Failure to do so will create
a hazardous installation and void the warranty.
All fittings on this heater are brass
– do not strip threads.
It is recommended to use unions as per figures 1 and 2. (See
Figure 3 for S70DTPP)
Heat exchanger connections are 3/4" male threaded fittings
(Exception: They are 1" male on the S70DTPP).
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/10) / (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 immersion well or
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 Top Performer. (See Thermostat Diagram 1)
Slide temperature sensor all the way into the immersion well (if
equipped)
– until it contacts the end. (See Thermostat Diagram 2)
Connect temperature sensor wires to press release connector (if
equipped). (See Thermostat Diagram 4)
Run all 24V
AC
wiring thru the square notch on bottom of
thermostat case.
(See Thermostat Diagram 3)
Summary of Contents for S27TPP
Page 14: ...11 Thermostat Diagram 1 Thermostat Diagram 2 ...
Page 19: ...16 FIGURE 4 ...