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16
FIGURE 7
CONDENSATE DRAIN TRAP
• The auxiliary drain line should be run to a place where it will be noticeable if it becomes
operational. The building occupant should be warned that a problem exists if water
should begin running from the auxiliary drain line. An auxiliary drain shut-off switch can
be installed in lieu of an auxiliary drain line. The shut-off switch should be wired into the
control circuit so the outdoor unit shuts down should the switch detect water.
• Plug the unused drain connection with the plugs provided in the parts bag, using a
thin layer of teflon paste, silicone or teflon tape to form a water tight seal.
• Test the condensate drain pan and drain line after installation is complete. Pour water
into drain pan, enough to fill drain trap and line. Check to make sure drain pan is
draining completely, no leaks are found in drain line fittings, and water is draining from
the open end of the primary drain line.
3.11 THERMOSTAT
See instructions for the condensing unit or heat pump for recommended room thermostats.
• On units with one electric heat sequencer (TD
er), heat anticipator setting should be .16.
• On units with two electric heat sequencers (TD
tric heater), heat anticipator setting should be .32 if both are connected to same stage
on thermostat. Setting should be .16 if (TD
NOTE: Some thermostats contain a fixed, non-adjustable heat anticipator.
Adjustment is not permitted.
• The thermostat should be mounted 4 to 5 feet above the floor on an inside wall of the
living room or a hallway that has good air circulation from the other rooms being con-
trolled by the thermostat. It is essential that there be free air circulation at the location
of the same average temperature as other rooms being controlled. Movement of air
should not be obstructed by furniture, doors, draperies, etc. The thermostat should
not be mounted where it will be affected by drafts, hot or cold water pipes or air ducts
in walls, radiant heat from fireplace, lamps, the sun, T.V. or an outside wall. See
instruction sheet packaged with thermostat for mounting and installation instructions.
3.12 ELECTRICAL WIRING
Field wiring must comply with the National Electric Code (C.E.C. in Canada) and any
applicable local ordinance.
WARNING
!
Disconnect all power to unit before installing or servicing. More than one dis-
connect switch may be required to de-energize the equipment. Hazardous volt-
age can cause severe personal injury or death.
3.12.1 CONFIGURING UNIT FOR 208 VOLT POWER
The control transformer in 208/240V air-handlers must be configured in the field to oper-
ate on a 208 volt electrical supply to assure adequate control voltage (24+ volts) with the
reduced supply voltage. The units are shipped from the factory for 230-240 volt appli-
cations.
For 208 volt applications, disconnect electrical power to the unit and remove
the blower/control access panel on the front of the unit. Then remove the insulated cap
from the 208 volt transformer terminal and move the BLACK wires that are connected to
the 240 volt transformer terminal to the 208 volt transformer terminal. Plug the insulated
cap onto the transformer 240V terminal.
ST-A1244-01-01
) (see wiring diagram for electric heat-
1
& TD
) (see wiring diagram for elec-
1
2
& TD
) are connected to separate stages.
1
2
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