SECTION IV - PRE START-UP

A. Pre Start-Up

All equipment has been factory tested, adjusted, metered and inspected to meet conditions set at the time the order was placed. Only minimal adjustments should be required. All information in this service manual is typical. All products are semi-custom and changes may occur.

Suggested Tools and Instruments

Volt/Ohm Meter

Thermometer

Tachometer

Ammeter

Manometer (0-10" W.C.)

Microammeter

Standard Hand Tools

D.C Volt Meter

Gas Pressure Gauge (0-35 lbs.)

 

NOTE: All servicing and adjustments of the Direct Gas-Fired unit should be performed by a qualified service engineer.

1.The owner’s representative or equipment operator should be present during start-up to receive instructions on care and adjustments of the equipment.

2.Remove all shipping blocks, brackets and bolts from supply fan base with optional isolation base.

3.Check all wiring for loose connections and tighten if necessary.

CAUTION: Line side of disconnect may be energized.

4.Inspect all fan and motor bearings and lubricate if necessary.Tighten setscrews on pulleys, bearings, and fans.

CAUTION: Do not rupture grease seals.

5.Inspect pulleys and belts for tightness, tension and alignment. Do not over tighten belts.

6.Check set screws on all bearings, pulleys and fans for tightness.

7.Check voltage supplied to disconnect switch. The maximum voltage variation should not exceed ±10%. Phase voltage unbalance must not exceed 2%.

8.Check thermostat(s) for normal operation.

9.Check that system duct work is installed and free from obstructions.

10.Check that fans turn free in housing.

11.Check burner for proper location and alignment.

12.Check that filters and accessories are installed correctly.

13.Check that vent lines have been run to atmosphere on indoor units. Note that some units will use vent limiters and vent lines are not required.

14.Check that all manual gas shut-off valves are closed.

15.When failure or malfunction of this heater creates a hazard to other fuel burning equipment, (e.g. when the heater provides make-up air to a boiler room), the heater is to be interlocked to open inlet air dampers or other such devices.

16.If inlet duct is attached to the heater, a purge timer must be provided and set to purge 4 times the inlet duct volume.

Purge time in seconds = 4 x L x W x H x 60

SCFM

L = duct length in feet,W = duct width in feet, H = duct height in feet, SCFM = rating plate air throughput.

Refer to the electrical schematic for the proper circuit placement. Purge timer P/N 65.0711.00.

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