Steffes 5140 Owner & Installers Manual - Manual (Page 8)

Static Heat recovery unit
NOTE: In applications using the Steffes Air Handler, the static heat recovery unit would not be used.
During operation of the Comfort Plus 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:
 Connects directly to the Comfort Plus Hydronic system to interface with the
internal controls of the system for automatic operation.
 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 Hydronic system is less than 100 square feet, Steffes Corporation
recommends installing a low voltage cooling thermostat, connected between R and G on the low voltage terminal
block, to maintain a temperature less than 85 degrees Fahrenheit.
optional accessories
2
Optional Accessories  2.01 Comfort Plus Hydronic
SinGle electrical feeD kit
The Steffes Comfort Plus 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 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:
 Includes a 5-gallon diaphragm type expansion tank, Grundfos brand pump (circu-
lator), air separator, air vent, pressure gauge, and pump connection conduit and
fittings.
 Contains the appropriate valves to bleed air from the system during filling along
with automatic purge during system operation and draining.
 Incorporates isolation flanges for quick and easy servicing of the primary loop
pump (circulator).
 Offers troubleshooting isolation between the heating system and secondary
zones.
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Order Item #1302110
Order Item #1302115