Hearth & Home Technologies • CNXT70PLUS • 4034-105 Rev C • 09/05
21
Fire Risk
Burn Risk
HOT! DO NOT TOUCH.
SEVERE BURNS MAY RESULT.
CLOTHING IGNITION MAY RESULT
Glass and other surfaces are hot during
operation and cool down.
WARNING
• Keep children away.
•
CAREFULLY SUPERVISE children in same room as
appliance.
• Alert children and adults to hazards of high
temperatures.
• Do NOT operate with protective barriers open or
removed.
• Keep clothing, furniture, draperies and other
combustibles away.
Improper installation, adjustment, alteration, service
or maintenance can cause injury or property damage.
Refer to the owner’s information manual provided with
this appliance. For assistance or additional information
consult a qualifi ed installer, service agency or the gas
supplier.
WARNING
Do NOT use this appliance if any part has been under
water. Immediately call a qualifi ed service technician
to inspect the appliance and to replace any part of the
control system and any gas control which has been
under water.
WARNING
11
Operating Instructions
A. Sequence of Operation
The CNXT70PLUS must be installed with an HRV200PLUS.
The appliance and ventilator operate as a system. The
HRV200PLUS controls many of the operational sequences
for the system, and the CNXT70PLUS gas appliance main-
tains safety control for the combustion process.
The sequence of operation for the system is as follows:
Appliance Mode
• The user creates a demand for system operation using
the remote control, wall switch or thermostat.
• A 12V DC signal is sent from the HI terminal on the
appliance circuit board to the HRV200PLUS.
• The HRV200PLUS does the following:
- Blower motor on HIGH for system pre-purge.
-
C2 terminal is energized 12VDC activating the electric
ember lights on the Fresh Air Fireplace.
- Fifteen-second pre-purge timer activates while the
HRV closes the alternate exhaust damper.
- C1 terminal is energized 12VDC to override pressure
switch in the Fresh Air Fireplace.
• R1 is energized 12VDC activating the IPI ignition circuit
to initiate the fi replace ignition process. In the HRV, the
R2 terminal must be jumpered to 12V to supply power to
R1 at the Fresh Air Fireplace.
• Thirty-second draft-proving delay timer activates.
• The Fresh Air Fireplace lights.
• The thirty-second draft-proving delay timer expires, C1
terminal is de-energized and the Fresh Air Fireplace
pressure switch is monitored for suffi cient fl ow at the
fl ue collar for proper operation.
IF SUFFICIENT FLOW
IS NOT SENSED AT THE FLUE COLLAR OF THE
FRESH AIR FIREPLACE AFTER THIRTY SECONDS OF
OPERATION, THE FRESH AIR FIREPLACE FLAMES
WILL EXTINGUISH LEAVING THE ELECTRIC EMBERS
ILLUMINATED ONLY. THE FRESH AIR FIREPLACE
WILL NOT SUSTAIN NORMAL OPERATION UNTIL THE
LACK OF FLOW IS CORRECTED!
•
When there is adequate draft at the fl ow sensor and 12VDC
is present at the R1 terminal on the circuit board, the green
LED on the lower left side of the board illuminates.
• When the user demand for appliance operation is
removed, the HRV200PLUS de-energizes C1 and R1
terminals, terminating burner operation.
• There is a 20 second delay (post-purge).
• The HRV200PLUS de-energizes C1, turning the ember
bed lights off.
•
The HRV200PLUS executes a fi ve-minute low speed post
purge.
