Steffes 5100 Series Installation Instructions

The optional Steffes ½ HP (Item #1302132 and ¾ HP (Item #1302134) variable speed air handlers are used to
interface a Comfort Plus Hydronic with a centrally ducted heating or cooling system. Each air handler includes
a plenum assembly, variable speed supply air blower, water coil, air filter, and installation 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 variable speed supply air blower are energized. The pump circulates
hot water through the air handler's water coil and the variable speed supply air blower extracts heat from the
water in the coil and delivers it to the appropriate heating zone through the ductwork. Since the air handler is
attached to the side of the Comfort Plus Hydronic system, it also provides automatic static heat recovery. If
used with a heat pump, the air handler monitors outlet air temperatures and provides comfort modulation.
Maximum Static Pressure
Maximum Water Coil Output (See Note)
Maximum A-Coil Size - Front Access
Voltage
Full Load Amps (240/208V)
Supply Air Blower
Filter
Standard Copper Pipe Size
NOTE: If using the ¾ or 1 HP Air Handler, the 90,000 BTU/hr coil output may decrease when using an
A-coil smaller than 5 ton.
Figure 1
½ HP
23.69"
23.5"
VARIABLE SPEED AIR HANDLER
OPERATION
SPECIFICATIONS & DIMENSIONS
22 5/16" W x 30" H x 22 3/4" D
¾ HP
23.69"
26.5"
Page 1 of 5
INSTALLATION INSTRUCTIONS
FOR 5100 & 7100 SERIES
1/2 HP
.75 inches H O
2
60,000 BTU/hr
240/208 VAC
4.3/5.0
1/2 HP, 60 HZ
20" x 20" x 2"
3/4"
Figure 2
3/4 HP
.75 inches H O
2
90,000 BTU/hr
25 5/16" W x 33" H x 22 3/4" D
240/208 VAC
6.8/7.3
3/4 HP, 60 HZ
20" x 25" x 2"
3/4"
Supply Air
Outlet
Blower Access
Coil Access
Cold Air
Bypass
Filter Access
Document #1200365 Rev 11
03/19/2021