GENERAL
This control panel provides the interface between the furnace
and the heat pump system.
The Heat Pump is the primary source of heat for the building
when the outdoor temperature is above the balance point. The
furnace provides supplemental heat when the outdoor tem-
perature is below the balance point. When the outdoor tem-
perature is below the setting of the low temperature cut-off,
only the furnace can operate.
A complete Maxi-Mizer Add-On System consists of the follow-
ing components (all shipped separately).
1. Outdoor Unit - E*FH with YorkGuard control
2. Indoor Coil - G1FD, G3US, G3HC, G1UA, G3UA or G2UT
3. Control Panel - 2AC02700801
4. Heat Pump Thermostat (2TH11702224, 2TH11702424, or
2ET11700224)
5. Furnace (gas, oil or electric)
See the E*FH technical guide for the approved combinations of
indoor coils and units.
The indoor coil must be installed down-stream of the furnace
discharge. The furnace/heat pump orientation may be upflow,
horizontal or downflow. Make sure that the indoor coil is being
applied within its application limitations.
LIMITATIONS
The installation of this unit shall be in accordance with all the
regulations of the authorities having jurisdiction. All lo-
cal/national codes and standards on electrical system, fuel-burning
appliances, and mechanical refrigerant systems must be ob-
served.
Observe all of the application limitations and clearance require-
ments for the outdoor unit, the furnace and the indoor coil.
ELECTRICAL DATA FOR CONTROL PANEL
The voltage limitations of the furnace must be determined by
the installer.
Determine the CFM capability of the furnace and the CFM re-
quirement of the heat pump system, and make sure the CFM's
are compatible. If the furnace can't deliver enough air or deliv-
ers too much air, the system will not operate properly. Do not
add a heat pump to any furnace where the existing furnace
blower can not provide sufficient air flow.
WARNING:Some indoor coils may be shipped with a substan-
tial refrigerant charge. Never allow a furnace to op-
erate on the heating cycle with one of these coils in
place but not connected to the rest of the heat
pump system.
INDOOR COIL - LOCATION AND MOUNTING
The indoor coil must be installed in the discharge air side of the
furnace. The coil should be centered on the furnace discharge
in a factory supplied casing. No modification of any part of the
furnace is permitted.
The casing provides an insulated enclosure which properly lo-
cates the indoor coil at the minimum required distance from the
furnace. At least 1" space must be maintained between the fur-
nace discharge and the underside of the coil drain pan.
See coil installation instruction for more information concern-
ing coil mounting.
CONTROL PANEL MOUNTING
The control panel should be mounted on a nearby wall within the
reach of its 10 foot long sensor wire. This wire should be carefully
routed from the control panel into the indoor coil casing.
CAUTION: Avoid routing the sensor wire over any sharp sheet
metal edges or any high temperature surfaces.
Mounting holes and screws are provided to secure the control
panel to the mounting surface. See Figure 1 for control panel
dimensions and hole locations.
NOTE: The control panel should never be mounted in or on
the furnace enclosure or discharge plenum. During
heating operation, high temperatures could damage
some of its components.
BRACKET AND SENSOR INSTALLATION
The mounting bracket and sensor location varies with the type
of coil and the application of that coil. Notice mounting bracket
fastening holes shown in illustration below:
®
MODEL
2AC02700801
Power Supply*
Voltage Min. - Max.
Min. Ckt. Amp.
Max. Fuse Size, Amps
Min. Wire Size (60
°
C), AWG
115-1-60
103 - 127
0.5
15
14
*
Power supply for the Add-on control panel only. See the installation instructions and the unit
instructions and the unit data plate for the power supply of the outdoor unit.
CAUTION
THE ENCLOSED INSTALLATION INSTRUCTIONS AND ANY APPLICABLE
LOCAL, STATE, AND NATIONAL CODES INCLUDING, BUT NOT LIMITED
TO, BUILDING, ELECTRICAL, AND MECHANICAL CODES.
THIS PRO DUCT M UST BE INSTALLED IN STRICT COMPLIANCE W ITH
WARNING
OPERATION OF THE PRODUCT COULD CAUSE PERSONAL INJURY
O R P R O P E R T Y D A M A G E .
INCORRECT INSTALLATION MAY CREATE A CONDITION W HERE THE
MODELS 2AC02700801
035-14216
ADD-ON CONTROL PANEL
FOR USE WITH
E*FH HEAT PUMPS
INSTALLATION INSTRUCTION
Supersedes: Nothing
545.01-N10Y (1296)