Wiring; Power - Boyertown Furnace RSM 500 Installation, Operation And Maintenance Manual

Furnace Model
RSM 500
RSM 600
RSM 750
Notes: 1. Approximate air settings see start up procedures for final adjustments

Wiring

WARNING
Electric shock hazard can cause severe personal injury or death if power source,
including service switch for the furnace, is not disconnected before installing or servicing the unit.
All wiring must conform to the National Electrical Code NFPA 70, latest edition and any additional
state or local codes.
All wiring must be N.E.C. Class 1. If original wiring as supplied with the furnace must be replaced,
replace with type 105

Power

Supply wire for the furnace must be sized for the load requirement as listed on the furnace rating plate.
Connect 120 VAC 60HZ single phase separate electrical line from the main house panel to the power
leads in the junction box attached to the furnace as indicated in the electrical wiring diagrams.
Provide a fused disconnect in the power line following all code requirements. Connect the burner to
the factory wired burner harness as shown in the electrical diagrams.
Provide electrical ground at the furnace as required by codes.
Emergency Power Switches
Oil burner emergency switches are to be installed as required by code. The homeowner should be
made aware of the location and proper operation of all emergency shut off switches
\
Thermostat and Wiring Connections
Thermostats are to be non power stealing with dry contacts only.
All thermostat and outdoor compressor signal connections are to be made on the nrgMax 9103i
terminal strip. For ease of installation remove the bolt in the bottom left corner of the control
mounting plate and hinge the mounting plate upward on the top two bolts.
When installing a heat pump the "O" terminal is for reversing valve energized for air conditioning
operation.
Oil burner operation is controlled by the nrgMax 9103i. The "T"-"T" connection on the oil burner if
provided should be jumped. No thermostat connections should be made to the oil burner primary
control.
When installing a thermostat incorporating a humidistat it must be configured to break on high
humidity. The humidistat will cause the blower to run at 90% of the desired air flow for improved
dehumidification. A jumper wire must be installed between "R" and "DH" if no humidistat is
present to dehumidify.
It is recommended to use a thermostat with an outdoor sensor to make the fuel change over from heat
pump to oil instead of a fossil fuel kit.
16
Table 10 Riello Burner Specifications
Burner Delavan
Model Nozzle
º
40F3 0.40X80 A
º
0.50X80 A
40F3
º
0.60X80 A
40F3
º
C wire or equivalent only. Use copper conductors only.
Pump Air
1
Press. Setting
165 1.50
165 2.75
165 3.25
Turbulator Tube
Setting Length
0 8"
0 8"
1.0 8"
Insertion
4-1/4"
4-1/4"
4-1/4"