Lennox G61MPV User Manual

Page 40
TABLE 26
G61MPV, SignatureStat and TWO STAGE OUTDOOR UNIT
OPERATING
SEQUENCE
SYSTEM DEMAND SYSTEM RESPONSE
System
Condition
Step
Thermostat Demand Relative Humidity
Compressor
Blower
CFM
(COOL)
Comments
Y1 Y2 O G
W
1
W
2
Status D
NO CALL FOR DEHUMIDIFICATION
Normal Operation −
Y1
1 On On On Acceptable
24
VAC
Low 70%*
Compressor and indoor
blower follow thermostat
demand
Normal Operation −
Y2
2 On On On On Acceptable
24
VAC
High 100%
ROOM THERMOSTAT CALLS FOR FIRST STAGE COOLING
BASIC MODE (only active on a Y1 thermostat demand)
Normal Operation 1 On On On Acceptable
24
VAC
Low 70%*
SignatureStat energizes
Y2 and de−energizes D on
a call for de−humidification
Dehumidification
Call
2 On On On On Demand
0
VAC
High 70%*
PRECISION MODE (operates independent of a Y1 thermostat demand)
Normal Operation 1 On On On Acceptable
24
VAC
Low 70%*
Dehumidification mode be-
gins when humidity is
greater than set point
Dehumidification
call
2 On On On On Demand
0
VAC
High 70%*
Dehumidification
call ONLY
1 On On On On Demand
0
VAC
High 70%*
SignatureStat will try to
maintain room humidity
setpoint by allowing the
room space to maintain a
cooler room thermostat
setpoint**
ROOM THERMOSTAT CALLS FOR FIRST AND SECOND STAGE COOLING
BASIC MODE (only active on a Y1 thermostat demand)
Normal Operation 1 On On On On Acceptable
24
VAC
High 100%
SignatureStat energizes
Y2 and de−energizes D on
a call for de−humidification
Dehumidification
Call
2 On On On On Demand
0
VAC
High 70%*
PRECISION MODE (operates independent of a Y1 thermostat demand)
Normal Operation 1 On On On Acceptable
24
VAC
Low 70%*
Dehumidification mode be-
gins when humidity is
greater than set point
Dehumidification
call
2 On On On On Demand
0
VAC
High 70%*
Dehumidification
call ONLY
1 On On On On Demand
0
VAC
High 70%*
SignatureStat will try to
maintain room humidity
setpoint by allowing the
room space to maintain a
cooler room thermostat
setpoint**
Jumpers at indoor unit with a two stage outdoor unit
Cut factory jumper from Y1 to Y2 or cut W915 (Y1 to Y2)
With Condensing unit − Cut W914 (R to DS) on SureLight board
With Heat Pump − Cut W914 (R to DS) & W951 (R to O) on SureLight board
Dave Lennox SignatureStat to use for this application − 51M27 2 heat / 2 cool or 51M28 − 2 heat / 2 cool for heat pumps
*Normal operation first stage cooling blower speed is 70% of COOL speed.
**In Precision mode, SignatureStats built before 10−2003 will maintain room temperature up to 3°F(1.8°C) cooler than room
setting. SignatureStats built 10−2003 and later will maintain room temperature up to 2 °F (1.2°C) cooler than room setting.

Lennox G61MPV Specifications

General

Blower Type	Variable speed
Energy Star Certified	Yes
Gas Valve	Modulating
Fuel Type	Natural gas or propane
Ignition Type	Electronic
Heating Stages	2
Warranty	Limited Lifetime warranty on heat exchanger; 10-Year limited warranty on covered components
Heating Capacity	44, 000 to 132, 000 BTUH