Exhaust Pipe Venting Information . Manual reset switches are factory installed on burner box. after unit lockout, eliminating nuisance calls for service. Repair Parts List. 69 Refer to Engineering Handbook for additional information. **Consider . G61MPV units are CSA International certified to ANSI. Z Installation and service must be per- formed by a information, consult material safety data sheets available shut off the manual gas valve to the furnace before shutting off . G61MPV units are equipped with a SureLight® ignition sys- tem.

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By sensing the position of the rotor and then switching the motor windings on and off in sequence, the rotor shaft turns the blower. This interference is caused by internal switching frequencies of the motor controller. Turn off power then restart.

Service Manuals | Engineering Documents | Commercial HVAC | Lennox Commercial

It’s a community-based project which helps to repair anything. The motor may attempt to start eight times. Combustion air inducer will not start with a Heating demand. The following scale shows the relative pH of some common liquids as compared with condensate of G61MPV units. If no power, check wire and connections.

Permitted seevice if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor. On field supplied terminations, a minimum distance between the end of the exhaust pipe and the end of the intake pipe without a termination elbow is 8″ and a minimum distance of 6″ with a termination elbow. The channel contains an orifice used to regulate flow created by the CAI. Insert transducer into the VDC and common inputs.


Blower should seervice at low cool speed. Electrical components are in the control box figure 2 found in the blower section.

Do not attempt to light manually. The switch can be manually reset. DANGER Disconnect power from unit and wait at literatuge five minutes to allow capacitors to discharge before attempting to adjust motor speed tap settings.

If the motor does not start after the eighth try, the controller locks out. Page 39 The length of time each pulse ing.

Humidity level above setpoint. Multiply the gas flow rate by the heating value to determine the unit input rate. Ignitor longevity is enhanced by controlling voltage to the ignitor. Be careful when servicing unit to avoid sharp edges which may result in personal injury.

Natural gas should burn blue. Diagnostic lights flash the limit failure mode. Limits must close within 3 minutes or unit goes into 1 hour Watchguard. Take y61mpv to reconnect wires correctly. In the absence of local or state codes, the guidelines and procedures outlined in this manual except where noted are recommendations only and do not constitute servcie.

Lennox G61MPV Service Manual

A 30 second second stage recognition period begins. If you informatuon not smell gas go to next step. Combustion air inducer energizes with Heating demand. The blower off delay affects comfort and is adjustable to satisfy individual applications.

Diagnostic lights flash the pressure switch failure code. Set the thermostat to initiate a heating demand and again allow the burners to fire for lierature 3 minutes. This inrush charges a bank of DC filter capacitors inside the controller. All connections for check out will be from 24VAC to plug J46, after disconnecting from blower control board. If end is not chamfered, edge of pipe may remove cement from fitting socket and result in a leaking joint.


Before attempting to perform. If replacement is necessary the gaskets used to seal the box to the vestbule panel and the CAI to the box, must also be replaced.

Look for bulging luterature swelling caps. Diagnostic lights flash the pressure switch failure code 2. This indicates that error code review is pending. Humidity level rises slightly 1 above setpoint.

G61MPV Service Literature G61MPV SERIES UNITS |

In some applications which permit the use of several different sizes of vent pipe, a combination vent pipe may be used. If a G61MPV furnace replaces a furnace which was commonly vented with another gas appliance, the size of the existing vent g61mppv for that gas appliance must be checked.

Inlet and outlet pressure taps are located on the valve. Flame Sensor A flame sensor is located on the left side of the burner support. The specified pipe size ensures proper velocity required to move the exhaust gases away from the building. The control continues to ramp down the voltage to the ignitor informattion it finds the lowest amount of power that will provide a successful ignition.

The test should be conducted while directed either downward or straight out. Suspend piping using hangers at a minimum of every 5 feet 1. Kits are available for conversion to LPG operation.