Boyertown Furnace RSM 500, Installation, Operation And Maintenance Manual

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cooling.
Blower Off Delay - Blower off delay after
a call for heat is adjusted through the Delay
Blower Off dip switches on the nrgMax
9103i board. The factory setting is 180
seconds but may be reduced to 150 or 120
seconds
Table 7
Direct Drive Blower Specifications - PSC Motor
Model HP Speeds RPM Volts Full
Load
Amp.
Capacitor
370 volt
mfd
Rotation Blower
Model
Blower
Speed
AC
Blower
Speed
Heat
RSM 500 3/4 3 1075 115 10.2 15 CCW 100-10T Hi Low
RSM 600 3/4 3 1075 115 10.2 15 CCW 100-10T Hi Low
RSM 750 3/4 3 1075 115 10.2 15 CCW 100-10T Hi Med
Table 8
PSC Motor Air Flow vs. Static Pressure
Motor
Speed 0.2”
Static
Press.
0.3”
Static
Press.
0.4”
Static
Press.
0.5”
Static
Press.
0.6”
Static
Press.
0.7”
Static
Press.
Low 1193 1175 1152
1125 1090 1053
Med 1425 1375 1310
1256 1190 1118
High 1616 1575 1525
1470 1395 1309
MOTOR CONVERSION
The nrgMax 9103i makes it possible to switch seamlessly between motor types.
When changing from an ECM motor to PSC motor remove the ECM motor power cable, 16 pin
control cable and 4 pin control cable. Attach the PSC motor speed leads to the proper output terminals
for heating, cooling and or continuous fan and any unused motor speed wires to the “Unused”
terminals. Attach the motor capcitor to the blower housing and connect the motor capacitor to the
appropriate motor leads.
When changing from a PSC motor to an ECM motor remove the capacitor wires and all PSC motor
speed wires from the nrgMax9103i. Attach the 16 x 4 wire box to the blower housing. Plug in the 16
pin control cable to both the nrgMax9103i and the 16 x 4 wire box. Plug in the 4 pin control cable to
both the motor and the 16 x 4 wire box. Plug the motor power cable into the motor and attach the
green ground wire to the ground screw on the control mounting panel the white wire spade terminal to
an open “Neutral” terminal and the black wire spaed terminal to an open “120 VAC” terminal.
DELAY-Blower Off
Delay Switch
#1 Position
Delay Switch
#2 Position
Program Blower Off
Delay
OFF OFF A 90 Seconds
ON OFF B 120 Seconds
OFF ON C 150 Seconds
ON ON D 180 Seconds