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Thermo Pride MODEL OPA User Manual

Page 26

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

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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 OPA Models

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.

Model

Potential/Frequency

/No. of Phases

(V/Hz/Ph)

Compressor

Running

Load

Current

(Amps) @

200 VAC

Compressor

Locked

Rotor

Current

(Amps) @

200 VAC

Condenser

Fan Full

Load

Current

(Amps) @

200 VAC

Supply/Return

Air Blower Full

Load Current

(Amps) @ 115

VAC

Oil Burner

Assembly

Full Load

Current

(Amps) @

115 VAC

Maximum

Time Delay

Type Fuse

or Inverse

Time Circuit

Breaker Size

(Amps)

Recommended

Time Delay

Type Fuse or

Inverse Time

Circuit Breaker

Size (Amps)

Minimum

Recommended

75 deg. C.

Copper Power

Wiring Size

(AWG)

OPA24

9.3

47

25

25

12

OPA30

13.6

61

35

30

10

OPA36

15

73

40

35

8

OPA42

18.4

95

50

35

8

11

5.8

208-240/60/1

2.1