KD GEMINI – INSTALLATION/OPERATION MANUAL
KD Gemini May-06
9
UNIT WIRING Caution: Disconnect the electrical power when wiring the unit.
INSTRUCTIONS Wire the blocked vent switch in accordance with The National
Electrical Code and applicable local codes. Wire the safety switch in
series with the burner limit control or aquastat. See the appliance-
wiring diagram in the manual or wiring label. Route the wiring with an
accepted wiring enclosure in accordance with The National Electrical
Code and applicable local codes.
SYSTEM TEST PROCEDURE
1. With the power re-established, block the chimney or vent pipe down stream of
the switch.
2. Adjust the thermostat to call for heat.
3. Once the heating system has started the blocked vent switch should shut down
the burner within 10 minutes or sooner.
4. Once the system has cooled, the blocked vent switch can manually be reset.
5. This procedure should be tested a second time.
6. After testing the blocked vent switch the chimney should be cleared of
obstruction and the heating system tested on a long burn cycle.
7. If the block vent switch shuts down the system check to ensure there is enough
draft in the chimney and venting pipes.
3.14 FAN CONTROL
LIMIT 200°F - Factory set
FAN ON 130°F
FAN OFF 100°F
3.15 OFF CYCLE AIR CIRCULATION
#4 LO SPEED All furnace models have the #4 Lo speed switch for optional constant
off cycle air circulation.
“FAN ON” When “FAN ON” is selected on the T87F thermostat, the blower will
OVER-RIDES run constantly at the #1 Hi speed providing heat, cooling or neither
#4 Lo as selected.
4.0 COMFORT ADJUSTMENTS
o Outlet air is initially too warm or too cold - adjust the fan on setting.
o Outlet air consistently too warm or too cold - change the blower motor speed to
give the specified air temperature rise (70 - 85°F).
o Blower motor shuts off and the oil burner keeps going - the “FAN ON” setting is
set too low or the inlet air is below 50°F.
o Outlet air gets too warm and burner shuts down - increase air by changing the
blower motor speed to give the specified temperature rise (70 - 85°F).
o Outlet air is too cold or too warm at the end of the heating cycle after the burner
has turned off - adjust the “FAN OFF” time higher or lower.
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