Nortek YDHA, Operation And Maintenance

Page: 38 / 48

Form O-Y, PN 273647R5, Page 38
5.0 Maintenance/Service Procedures - Gas Heat Section (cont'd)
5.2 Combustion Air and Venting (cont'd)
Combustion Air Switches for Sea Level to 6000 ft. (1830 m)
Heat
Section
Option
Heat
Size(s)
(Btuh)
High Pressure Switch Low Pressure Switch (AG73 & AG74 Only)
Startup
Cold
Equilibrium
Hot
Setpoint
Off
Label
Color
Switch
P/N
Startup
Cold
Equilibrium
Hot
Setpoint
Off
Label
Color
Switch
P/N
230, 460,
575V
% Full
Speed of
Venter Mtr
208V
% Full
Speed of
Venter Mtr
Negative Pressure (iwc) Negative Pressure (iwc)
H50 50,000 3.10 2.00 1.50 Yellow 273360 3.50 1.30 0.75 Yellow 205443 74 82
H75 75,000 3.30 1.60 1.40 Red 201159 3.30 1.30 1.00 Brown 201160 74 82
H100 100,000 3.40 1.70 1.40 Red 201159 3.40 1.20 1.00 Brown 201160 74 82
H102* 50,000 3.10 2.00 1.50 Yellow 273360 3.50 1.30 0.75 Yellow 205443 74 82
H125* 50,000
3.10 2.00 1.50 Yellow 273360 (No low pressure switch on this furnace)
75,000 3.30 1.60 1.40 Red 201159 3.30 1.30 1.00 Brown 201160 74 82
H150* 75,000 3.40 1.60 1.40 Red 201159 3.30 1.30 1.00 Brown 201160 74 82
H175* 75,000
3.30 1.60 1.40 Red 201159 (No low pressure switch on this furnace)
100,000 3.40 1.70 1.40 Red 201159 3.40 1.20 1.00 Brown 201160 74 82
H200 200,000
3.80 1.80 1.40 Red 201159 3.80 0.90 0.75 Yellow 205443 42 54
H202* 100,000 3.40 1.70 1.40 Red 201159 3.40 1.20 1.00 Brown 201160 74 82
H300 300,000 3.90 1.90 1.50 Yellow 273360 3.90 0.90 0.75 yellow 205443 48
56
H400 400,000 3.80 1.80 1.50 Yellow 273360 3.80 1.00 0.80 Gray 197078 58 64
H402* 200,000
3.80 1.80 1.40 Red 201159 3.80 0.90 0.75 Yellow 205443 42 54
H502
200,000 3.80 1.80 1.40 Red 201159 (No low pressure switch on this furnace)
300,000 3.90 1.90 1.50 Yellow 273360 3.90 0.90 0.75 Yellow 205443 48
56
H602* 300,000 3.90 1.90 1.50 Yellow 273360 3.90 0.90 0.75 Yellow 205443 42 56
H702 300,000
3.90 1.90 1.50 Yellow 273360 (No low pressure switch on this furnace)
400,000 3.80 1.80 1.50 Yellow 273360 3.80 1.00 0.80 Gray 197078 58 64
H802* 400,000
3.80 1.80 1.50 Yellow 273360 3.80 1.00 0.80 Gray 197078 58 64
G150 150,000 2.70 2.20 1.40 Red 201159 2.70 1.70 0.10 White 234712 61 74
G225 225,000 2.90 2.50 1.40 Red 201159 2.90 1.30 0.10 White 234712 61 74
G300 300,000 2.70 2.50 1.30 White 201161 2.70 0.90 0.10 White 234712 61 74
G302* 150,000 2.70 2.20 1.40 Red 201159 2.70 1.70 0.10 White 234712 61 74
G372 150,000
2.70 2.20 1.40 Red 201159 (No low pressure switch on this furnace)
225,000 2.90 2.50 1.40 Red 201159 2.90 1.30 0.10 White 234712 61 74
G452* 225,000 2.90 2.50 1.40 Red 201159 2.90 1.30 0.10 White 234712 61 74
G525 225,000
2.90 2.20 1.40 Red 201159 (No low pressure switch on this furnace)
300,000 2.70 2.50 1.30 White 201161 2.70 0.90 0.10 White 234712 61 74
G602* 300,000 2.70 2.50 1.30 White 201161 2.70 0.90 0.10 White 234712 61 74
Combustion Air Switches for Above 6000 ft. (1830 m)
Heat
Section
Option
Heat
Size(s)
(Btuh)
High Pressure Switch
Heat
Section
Option
Heat
Size(s)
(Btuh)
High Pressure Switch
Setpoint
Off
Label
Color
Switch
P/N
Setpoint
Off
Label
Color
Switch
P/N
Negative Pressure (iwc) Negative Pressure (iwc)
H50 50,000 1.45 Orange 273555
H702* 300,000
1.45 Orange 273555
H75 75,000 1.35 Green 273554 400,000 1.45 Orange 273555
H100 100,000 1.35 Green 273554 H802 400,000 1.45 Orange 273555
H102* 50,000 1.45 Orange 273555 G150 150,000 1.35 Green 273554
H125*
50,000
1.45 Orange 273555
G225 225,000
1.35 Green 273554
75,000 1.35 Green 273554 G300 300,000 1.25 Blue 273553
H150* 75,000
1.35 Green 273554
G302 150,000
1.35 Green 273554
H602* 300,000 1.45 Orange 273555