Relay Box Installation - Nordyne MGHA Series Installation Instructions Manual

Blower Speed Selection Chart
For use with Blower Kit No. 902809
Heating
Furnace Input Speed
Setting
086 M*
070, 075, 077 L**
056, 066, 070 L**
*MH on Relay Box circuit board.
**ML on Relay Box circuit board.
Blower Speed Selection Chart
For use with Blower Kit No. 902809
Heating
Furnace Input Speed
Setting
086 M*
070, 075, 077 L**
056, 066, 070 L**
Table 2. Three and Four Speed Blower Speed Selec-
tion for MG & MM - 05 Models
Blower Speed Selection Chart
For use with Blower Kit No. 903412 1/3 HP 2 Speed
Heating
Furnace Input Speed
Setting
077, 086, 090
056, 066, 070 ML*
*ML on Relay Box circuit board is low speed.
Blower Speed Selection Chart
For use with 3 Ton 3 Speed Blowers
Heating
Furnace Input Speed
Setting
056 L**
066, 070, 077 M*
086, 090 H
**L is ML on circuit board.
*M is MH on circuit board.
Blower Speed Selection Chart
For use with Blower Kit No. 903413 1/2 HP 4 Speed
Heating
Furnace
Speed
Input
Setting
077, 086, 090 ML
056, 066, 070 L
Blower Speed Selection Chart
For use with Blower Kit No. 903414 3/4 HP 4 Speed
Heating
Furnace
Speed
Input
Setting
077, 086, 090 ML
056, 066, 070 L
Table 2A. Blower Speed Selection M1 Models
Cooling Speed/ Evap Coil
042, 046 &
024, 030 036
M* H
M* H
M* H
Cooling Speed/ Evap Coil
042, 046 &
024, 030 036
M* H
M* H
M* H
Cooling Speed/ Evap Coil
024 036 & 030
H ML*
ML*
Cooling Speed/ Evap Coil
024 030
L** M*
L** M*
L** M*
Cooling Speed/ Evap Coil
030 &
024 042
036
ML ML MH
ML ML MH
Cooling Speed/ Evap Coil
030 &
024 042
036
ML ML MH
ML ML MH
048
H
H
H
048
H
H
H
Bracket
- Left
H
Relay Box
H
036
H
H
H
048
H
H
048
H
H
Bracket -
Left
p/n 903092A, 2-wire relay
Bracket
p/n 902898A, A/C Heat Pump
Figure 3. Relay Box Installation
MGHA & MMHA Only
Bracket -Right
Relay Box
Bracket
- Right
Relay Box
(4-7 wire) relay box
3