Installation; Thermostat Installation Location Recommendations; Thermostat Mounting; Equipment Control Module Installation Location - Aprilaire 8840 Safety & Installation Instructions

INSTALLATION

THERMOSTAT INSTALLATION LOCATION RECOMMENDATIONS

Thermostat should be mounted: Do not mount thermostat:
• On an interior wall, in a frequently • Behind doors, in corners or other dead air spaces .
occupied space .
• In direct sunlight, near lighting fixtures, or other appliances that
• Approximately 5' above floor .
• At least 18" from outside wall . • On an outside or unconditioned area wall .
• Thermostat can be mounted to a • In the flow of a supply register, in stairwells, or near outside doors .
vertical junction box .
• On a wall with concealed pipes or ductwork .

THERMOSTAT MOUNTING

1 . Remove the rear mounting plate from the thermostat .
2 . Pull wires through the opening on the rear mounting plate .
3 . Position and level the mounting plate of the thermostat on wall and
mark the hole locations with a pencil .
4 . Drill 1/4" holes and insert supplied anchors (drywall only) .
5 . Place mounting plate over anchors, insert and tighten screws .
6 . Seal wire entry holes to prevent drafts affecting temperature readings .
EQUIPMENT CONTROL MODULE INSTALLATION LOCATION RECOMMENDATIONS
Note: Installer must touch a grounded metal object before handling the equipment control module to avoid potential
damage due to electrical discharge .
Equipment control module should be mounted:
• In a location where the temperature will not exceed 158°F (70°C) or drop below 32°F (0°C) .
Do not mount equipment control module:
• On foundation walls or on the HVAC equipment or ductwork . These locations can cause moisture to condense on
the equipment control module .
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give off heat .
INSTALLATION

EQUIPMENT CONTROL MODULE MOUNTING

The equipment control module has the following features to simplify mounting and wiring and provide for a clean
and neat installation .
• Six (6) mounting holes . One on each corner and two centered top and bottom . Any combination of these holes
may be utilized . Mount the equipment control module using 2 to 4 #8 screws appropriate for the mounting surface
substrate . (See Figure 2 .)
• Wires can be routed through
the top, bottom, sides or back .
• Nylon wire ties can be used
to secure wires in 10 places .
Installation Steps
1 . Select mounting location .
2 . Pull from bottom to remove
front cover . (See Figure 1 .)
3 . Mount base using 2 to 4 #8
screws (field supplied) .
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THERMOSTAT WIRING

Wire specifications:
18-24 gauge thermostat wire
Installation notes:
• Ensure power at the HVAC equipment is off .
• Loosen screw terminals, insert stripped wire
and re-tighten .
• Push the excess wire back into the opening and plug the wall opening to prevent drafts .
1 – Connection to terminal 1 at equipment control module
2 – Connection to terminal 2 at equipment control module
3 – Connection to terminal 3 at equipment control module
A & B – Model 8081 or Model 8082 support module communication (optional)
T1 & T2 – Remote temperature sensor (optional)
Figure 1 Figure 2
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