Steffes 5120 Manual

For use with Model 5120, 5130, 5140 Comfort Plus Hydronic Heating Systems
The Steffes ¾ HP Air Handler (Item # 1302102) is an optional device used to interface the Comfort Plus
Hydronic with a centrally ducted heating or cooling system. The Air Handler includes a plenum assembly,
supply air blower, water coil, air filter, wiring harness, and hardware kit.
When the Comfort Plus Hydronic system receives a heat call from the air handler's room thermostat, the
primary loop pump (circulator) is energized to circulate water through the heat exchanger. At the same time,
the air handler's pump (circulator) and the supply air blower are energized. The pump circulates the hot
water through the air handler's water coil and the supply air blower extracts the heat from the water in the
coil and delivers it to the appropriate heating zone through the ductwork. When connected directly to the
Comfort Plus Hydronic system, the air handler also directs heat lost statically into the living space providing
automatic static heat recovery. If used with a heat pump, the air handler has the ability to monitor the outlet
air temperature and provide comfort modulation as needed.
Maximum Outlet Temperature
Maximum Static Pressure
Maximum Water Coil Output
Maximum A-Coil Size - Front Access
Inner Dimensions of A-Coil Area
Voltage
Wattage
Supply Air Blower
1. De-energize the Comfort Plus Hydronic system and unbox the
Air Handler.
2. Remove cover from the supply blower opening (Figure
1) of the Air Handler and locate the hardware kit.
3. Remove coil and filter covers. Then, remove the water
coil access panel of the Air Handler.
WARNING
Hazardous Voltage: Risk of electric
shock, injury or death. System may be
connected to more than one branch
circuit. Disconnect power to all circuits
before installing or servicing.
Equipment must be installed and
serviced by a qualified technician.
High Temperatures: Risk of personal
injury. DO NOT install Air Handler
when outer surfaces of the Comfort
Plus Hydronic system are hot.
STEFFES CORPORATION
AIR HANDLER – ¾ HP

OPERATION

SPECIFICATIONS

INSTALLATION

Page 1 of 4
120 degrees Fahrenheit
.75 inches H O
2
80,000 BTU/hr
25.4"W X 22.25"H X 21.2"D
26.4"W X 24.5"H X 21.2"D
240/208 VAC
1,300
3/4 HP, 60 HZ
16 1/16"
Return Air
Filter Tray
"A Coil" Tray
Water Coil
Supply
Blower
27 7/16"
OVERALL
Figure 1
12 7/8"
Supply
Air
25"
23 1/4"
60 1/8"
OVERALL
36 1/16"
OVERALL
Document # 1200335 Rev 1
05/13/04