Steffes 7140 - Manual (Page 8)

Optional Accessories
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Optional Accessories
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2.01 Comfort Plus Commercial Hydronic
SINGLE ELECTRICAL FEED KIT
The Steffes Comfort Plus Commercial systems have built-in circuit breakers. They are
factory configured to be field connected to multiple line voltage circuits. If single feed
to the element and blowers/control circuits is desired, the single feed kit is available to
allow the system to be powered with a one, larger line voltage circuit. Contact the
factory for ordering details.
When using single feed, the neutral conductor MUST be sized in
accordance with all applicable local, state, and national codes and
regulations.
PRIMARY LOOP KIT
The Comfort Plus Commercial Hydronic system requires a primary water loop which serves to regulate heat transfer
from the unit’s heat exchanger. To minimize installation time and costs for field design and engineering of this loop,
Steffes Corporation offers a primary loop kit. The kit contains the components generally installed with hydronic heat
systems.
Features:
w Includes a 5-gallon diaphragm type expansion tank, Grundfos brand pump
(circulator), air separator, air vent, pressure gauge, and pump connection
conduit and fittings.
w Contains the appropriate valves to bleed air from the system during filling along
with automatic purge during system operation and draining.
w Incorporates isolation flanges for quick and easy servicing of the primary loop
pump (circulator).
w Offers troubleshooting isolation between the heating system and secondary
zones.
STATIC HEAT RECOVERY UNIT
In applications using the Steffes Air Handler, the static heat recovery unit would not be used.
During operation of the Comfort Plus Commercial Hydronic system, some heat from the brick core storage will
radiate through its outer panels. If the system is located in an area with minimal heating requirements, such as a
utility room, the static heat recovery unit can maximize the system’s efficiency
by transferring this static heat to a more desirable location.
Features:
w Connects directly to the Comfort Plus Commercial Hydronic system to
interface with the internal controls of the system for automatic operation.
w Specifications:
• Wattage: 130 WATTS
• Motor: .1 HP, 60 HZ
• Voltage: 208/240 VAC
• Maximum Static Pressure: .15 inches Water Column
• CFM @.15 SP: 130 CFM
If the area available to install the Comfort Plus Commercial Hydronic system is less than 100
square feet, Steffes Corporation recommends installing a low voltage cooling thermostat,
connected between R and G on the 12-position terminal block, to maintain a temperature less
than 85 degrees Fahrenheit.
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Order Item #1302110
Accessories
Order Item #1302115
208/240 Volt Only