Cumberland C225, Operation And Maintenance Manual

Page: 27 / 58

PNEG-308 Purafire 27
9. Start-Up
Instructions
NOTE: Read the following instructions carefully. Any unauthorized modifications to or deviations from
these instructions may void warranty.
Visual Inspection of Heater
1. Check for any physical damage from shipping or installation that could render the heater inoperable.
2. Check for loose components, burner, gas valve, motor, terminal screws, etc., and verify that the
blower wheel rotates freely.
3. Verify that field wiring has been performed in accordance with Electrical Code ANSI/NFPA 70-1993.
4. Verify that supply gas line is properly connected and a sediment trap and shut off cock have been
provided to the heater’s gas inlet. Also verify that the high-pressure regulator, if applicable, has
been vented to the outside of the building.
5. Visually inspect the gas hose for excessive abrasion, wear or cuts.
6. Verify that all external accessories have been installed and secured.
Electrical Supply Voltage
Check electrical supply voltage and verify that it is compatible with the nameplate ratings. Ensure that
the heater is properly grounded, and that the polarity is correct.
Gas Leak Test
Check all gas connections for leak using a leak detector solution. Repair any gas leaks before test firing
the burner or placing this heater into service.
Adjust Supply Gas Pressure
1. Turn the supply gas OFF at the manual shut off cock upstream of the heater.
2. Remove the 1/8" plug located on the gas valve next to the supply gas inlet (See Figure 9A
on Page 28.) and connect a manometer to the supply pressure tap.
3. Turn the supply gas ON at the manual shut off cock upstream of the heater.
NOTE: It may be necessary to bleed off the trapped gas in the manometer line to obtain a
proper reading.
4. Turn ON all appliances connected to the gas line.
5. Verify that the supply gas pressure is less than 14" W.C. (1/2 PSI) and greater than that shown on
the heater’s nameplate for the minimum inlet gas supply pressure for the purpose of
input adjustment.
6. Turn the supply gas OFF.