Nordyne SERIES M1B Manuel D’Utilisation

15

On-Off
Switch

Blower

Plug

Power

Entry

On-Auto Switch

(Heating Models Only)

Thermostat Wires

Furnace

Control Box

To combustion

Blower or Flame

Roll-out Switch

To Gas Valve

or Burner

2-Wire

(Heating)

5-Wire

(Heating/Cooling)

24

55

25

22

90

45

20

140

70

18

225

110

Connecting Power Supply Wires
1. Remove the furnace control panel cover.
2. Route wires (115 VAC) through the strain 

relief on the left side of the furnace control box 
(see Figure 24).

3. Connect the hot wire to the black pigtail lead, 

and the neutral wire to the white pigtail lead. 
Secure all connections with suitable wire nuts.

4. Connect  the  ground wire to the grounding 

screw.

5. Reinstall the control panel cover and secure 

with the original mounting screws.

Low Voltage Wiring
The thermostat must be installed according 
to the instructions supplied by the thermostat 
manufacturer. Low voltage connections (24 VAC) 
from the thermostat are wired to the terminal strip 
on the integrated control in the furnace.

NOTE: The thermostat must not be installed on 
an outside wall or any other location where its 
operation may be adversely affected by radiant 
heat from fi replaces, sunlight, or lighting fi xtures, 
and convective heat from warm air registers or 
electrical appliances. The nominal anticipator 
setting is 0.4. (Refer to the thermostat literature 
for additional information.)

Five-conductor thermostat wire is recommended 
for 24 volt low-voltage circuit (2-wire is required 
for furnace only; 5-wire for heating and optional 
cooling systems). Refer to table 6 for thermostat 
wire information.

Connecting Thermostat Wires
1. Insert 24 volt wires through the plastic grommet 

just above the control panel.

2. Connect the thermostat wires to the furnace 

low voltage pigtails (see Figure 25).

3. Connect low-voltage circuit to the wall 

thermostat.

4. A hole may be made in the furnace cabinet 

to ease thermostat wiring. Make sure that the 
wiring is protected from the sharp edge of the 
added hole.

Verifying Anticipator Setting
After the furnace is installed, check the thermostat 
anticipator against the nominal setting of 0.4.

1. Connect the milliamp meter in series with one 

of the gas valve’s low voltage terminals.

2. Energize the gas valve.
3. Read the value of the milliamps.
4. Adjust the heat anticipator of the thermostat 

to the value on the milliamp meter.

 

If the heat 

anticipator is set too high, the furnace may 
delay turning on. If set too low, the furnace 
may cycle frequently and not provide comfort 
to the homeowner.