Lennox G61MP - Manual

Lennox G61MP

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Table of Contents:

  • Page 4 – BLOWER DATA
  • Page 8 – I−UNIT COMPONENTS; CAUTION
  • Page 11 – TABLE 6; DIAGNOSTIC CODES; DESCRIPTION; B−Blower Compartment; FIGURE 5
  • Page 12 – C−Heating Components; FIGURE 6
  • Page 13 – Clamshell Heat Exchanger; FIGURE 8; Combustion Air Inducer; two
  • Page 14 – ings will change as heat exchanger warms.
  • Page 16 – II−PLACEMENT AND INSTALLATION; OUTDOOR TERMINATION KITS AND CORRESPONDING EQUIVALENCIES; UNIT
  • Page 17 – A−Vent Piping Guidelines; The G61MP can be installed as either a Non−Direct Vent
  • Page 18 – MINIMUM VENT PIPE LENGTHS; MAXIMUM VENT PIPE LENGTHS; B−PVC Joint Cementing Procedure; WARNING; NOTE − Time is critical at this stage. Do not allow prim-
  • Page 19 – C− Venting Practices; Exhaust Piping; IN UPFLOW OR DOWNFLOW DIRECT OR NON-DIRECT VENT APPLICATIONS
  • Page 20 – TYPICAL EXHAUST PIPE CONNECTIONS; HORIZONTAL DIRECT OR NON-DIRECT VENT; IMPORTANT; Intake Piping
  • Page 21 – UPFLOW OR DOWNFLOW DIRECT VENT APPLICATIONS; TYPICAL AIR INTAKE PIPE CONNECTIONS; HORIZONTAL DIRECT VENT APPLICATIONS; Follow the next three steps when installing the unit in; TYPICAL AIR INTAKE PIPE CONNECTIONS; UPFLOW OR HORIZONTAL NON-DIRECT
  • Page 22 – DOWNFLOW NON-DIRECT VENT APPLICATIONS; ELL; the intake air routing should be modi-; CARBON MONOXIDE POISONING HAZARD!
  • Page 25 – EXHAUST PIPE TERMINATION SIZE REDUCTION
  • Page 27 – Front View; G61MP DIRECT VENT APPLICATION
  • Page 28 – G61MP NON−DIRECT VENT APPLICATION
  • Page 29 – Do
  • Page 30 – A−Preliminary and Seasonal Checks; Shock and burn hazard.; Honeywell VR8205 Gas Valve −
  • Page 31 – C−Safety or Emergency Shutdown; C−Testing Gas Piping
  • Page 32 – G− Proper Combustion
  • Page 33 – Tap Water; Increasing
  • Page 34 – J−Flame Signal; To Measure Flame Signal − Ignition Control:; B−Temperature Rise; To Measure Temperature Rise:; C−External Static Pressure
  • Page 37 – Cleaning the Burner Assembly
  • Page 38 – VII− Wiring and Sequence of Operation
  • Page 39 – Sequence of Operation; SureLight Control Self Check
  • Page 40 – CONTINUED ON NEXT PAGE
  • Page 42 – CONTINUED
  • Page 44 – COOLING SEQUENCE OF OPERATION
  • Page 45 – CONTINUOUS LOW SPEED FAN SEQUENCE OF OPERATION
  • Page 46 – VIII− Field Wiring Applications and Jumper Settings; Field Wiring Applications
  • Page 48 – UPON INITIAL POWER UP, REMOVE ALL THERMOSTAT DEMANDS TO THE UNIT; Condition
  • Page 49 – ENERGIZE
  • Page 52 – PROBLEM 5: BURNERS LIGHT WITH HEATING DEMAND BUT UNIT SHUTS DOWN
  • Page 53 – PROBLEM 6: CONTROL SIGNALS LOW FLAME SENSE DURING HEATING MODE; FAN MODE; PROBLEM 8: RF STATIC DURING TIME FOR IGNITION
  • Page 54 – SERVICE NOTES
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Page 1

©

2003 Lennox Industries Inc.

Corp. 0308−L6

G61MP

Service Literature

Revised 10−2004

G61MP SERIES UNITS

G61MP series units are high−efficiency multi−position (up-

flow, downflow, horizontal right and left) gas furnaces
manufactured with Lennox Duralok Plus

t

heat exchang-

ers formed of aluminized steel. G61MP units are available
in heating capacities of 44,000 to 132,000 Btuh (13.0.0 to

38.6 kW) and cooling applications from 2 to 5 tons (7.0 kW
to 17.5 kW)) up to 5 tons. Refer to Engineering Handbook

for proper sizing.

Units are factory equipped for use with natural gas. Kits are

available for conversion to LPG operation. G61MP model

units are equipped with the Two−Stage Integrated SureLight

control. All G61MP units meet the California Nitrogen Ox-

ides (NO

x

) Standards and California Seasonal Efficiency re-

quirements. All units use a redundant gas valve to assure

safety shut−off as required by C.S.A.

All specifications in this manual are subject to change. Pro-
cedures outlined in this manual are presented as a recom-

mendation only and do not supersede or replace local or
state codes. 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 consti-

tute code.

TABLE OF CONTENTS

Introduction

1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Specifications

2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Blower Data

4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts Identification

7

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I Unit Components

8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

II Installation

16

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

III Start Up

30

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

IV Heating System Service Checks

31

. . . . . . . . . . . . . .

V Typical Operating Characteristics

34

. . . . . . . . . . . . . .

VI Maintenance

35

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

VII Wiring and Sequence of Operation

38

. . . . . . . . . . . .

VIII Field Wiring and Jumper Setting

46

. . . . . . . . . . . . .

IX Control Board Troubleshooting

48

. . . . . . . . . . . . . . . .

IMPORTANT

Improper installation, adjustment, alteration, service
or maintenance can cause property damage, person-
al injury or loss of life. Installation and service must
be performed by a qualified installer, service agency
or the gas supplier.

WARNING

Electric shock hazard. Can cause injury
or death. Before attempting to perform
any service or maintenance, turn the
electrical power to unit OFF at discon-
nect switch(es). Unit may have multiple
power supplies.

WARNING

Sharp edges.
Be careful when servicing unit to avoid sharp edges
which may result in personal injury.

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Summary

Page 4 - BLOWER DATA

Page 4 BLOWER DATA G61MP−36B−045 PERFORMANCE (Less Filter) External Static Air Volume / Watts at Different Blower Speeds External Static Pressure High Medium−High Medium−Low Low in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts cfm L/s Watts 0.00 25 1555 735 630 1410 665 585 1190 560 520 1030 48...

Page 8 - I−UNIT COMPONENTS; CAUTION

Page 8 I−UNIT COMPONENTS G61MP unit components are shown in figure 1. The gasvalve, combustion air inducer and burners can be ac-cessed by removing the burner access panel. Electricalcomponents are in the control box (figure 2) found in theblower section.G61MP units are factory equipped with a botto...

Page 11 - TABLE 6; DIAGNOSTIC CODES; DESCRIPTION; B−Blower Compartment; FIGURE 5

Page 11 TABLE 6 DIAGNOSTIC CODES Diagnostic LEDs are labeled DS1 and DS2. See figure 4 for location of diagnostic LEDs. DS1 DS2 DESCRIPTION SIMULTANEOUS SLOW FLASH SIMULTANEOUS SLOW FLASH Power on − Normal operation.Also signaled during cooling and continuous fan. SIMULTANEOUS FAST FLASH SIMULTANEOU...

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