Thermo Products 30, OPB (24, 36)- 80 service manual

All installations and services must be performed by qualified service personnel.

Typically, control wiring between the outdoor appliance and the indoor thermostat, and if used, electronic air cleaner or humidifier, will be required. Field wiring of control circuits should consist of copper conductors rated for at least 240 VAC with an insulation temperature rating conforming to Type T wire, 35°C temperature rise. Depending upon code requirements, rigid or flexible conduit is recommended, and may be required. Make connections between the thermostat, and electronic air cleaner or humidifier (if used), and the fan control module, inside the burner compartment. Consult the wiring diagram for the appropriate connection points on the thermostat and the fan control module.

Table 5: Typical Electrical Requirements for Various OPB Models

		Compressor	Compressor	Condenser	Supply/Retur	Oil	Maximum	Recommend	Minimum
						Burner	Time Delay	ed Time
	Potential/Frequency	Running	Locked	Fan Full	n Air Blower	Assembly	Type Fuse	Delay Type	Recommended
Model	/No. of Phases	Load	Rotor	Load	Full Load	Full Load	or Inverse	Fuse or	75 deg. C.
	(V/Hz/Ph)	Current	Current	Current	Current	Current	Time Circuit	Inverse Time	Copper Power
		(Amps) @	(Amps) @	(Amps) @	(Amps) @	(Amps)	Breaker	Circuit	Wiring Size
		200 VAC	200 VAC	200 VAC	115 VAC	@ 115		Breaker Size	(AWG)
							Size (Amps)
						VAC		(Amps)
OPB24	208-240/60/1	15	58.3	0.8	9.6	5.8	40	30	10
OPB30		14.3	64				40	30	10
OPB36		18.6	79				50	35	8

Wire size selections in Table 5 are based upon Table 310-16 of the National Electrical Code for three copper conductors, with insulation rated for 75 degrees Celsius, contained in raceway at 30 degrees Celsius. For other wire insulation temperature ratings and ambient conditions, refer to the National Electrical Code for the minimum wire sizing requirements.

NOTICE: Before the unit is started, the installer and/or electrician must check the following items.

1.Check every electrical connection of “push-on” or “screw-on” type terminals to ensure that all wires and wire connectors are firmly secured. A loose terminal can cause poor flow of electrical power to motors and to the refrigeration compressor. This may result in very high current draws by these components. If great enough, high current draw will cause blown fuses, burned wires and contactor points, and pre-mature motor or compressor failure. Each electrical connection has been factory checked, however, connections may loosen, due to vibration, while the appliance is in transit. Please be certain that all electrical connections remain tight.

2.Review wiring diagram for proper routing and connection of all field wiring.

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