How To; Test For Positive Ground; Test For Negative Pressure; Bypassing A Switch - Re-Verber-Ray DX Troubleshooting Manual

1
- Take an Inlet Pressure Reading: (Always take the inlet pressure before taking the manifold pressure)
♦ Follow the same procedures as taking a Manifold Pressure Reading (Step 2 below) except use
the inlet tap on the gas valve or the gas cock, located on the outside of the heater.
2
- Take a Manifold Pressure Reading:
Turn gas and power to the heater off.
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♦ Remove lid.
♦ Locate outlet tap on gas valve (pg. 8, pic. 6).
♦ Remove tap using a 3/16" allen wrench.
♦ Insert a 1/8" pipe-thread barb fitting and run a hose to the outside of the burner box using the
5/16" capped hole next to the gas valve line opening, or, the 3/8" hole next to the conduit going
to the glo-bar box (newer models only).
♦ Connect tube to a Manometer or Magnahelic.
♦ Reinstall lid.
♦ Fire heater.
The reading on the Manometer or Magnahelic is the manifold pressure.
♦
3
- Check for Proper Polarity:
Turn off power to the heater.
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♦ Remove the cover of the 2x4 junction box on the outside of the heater - if applicable.
♦ Locate the three wires inside - black, white & green.
♦ Using a voltmeter, touch the black wire with one probe and the green wire with the other -
confirm 120V.
Using a voltmeter, touch the white wire with one probe and the green wire with the other -
♦
confirm 0.0V.
♦ If the previous step confirmed 120V, the polarity is reversed and must be corrected in the conduit
upstream from the heater.
4

- Test for Positive Ground:

♦ Be sure that the ground (green) wire goes all the way back to the circuit panel.
♦ If it does not, a qualified electrician must rerun this line.
5

- Test for Negative Pressure:

The building has a negative pressure if any of the following is occurring:
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6

- Bypassing a Switch:

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Building's door(s) shut very quickly with a loud bang.
Building's door(s) are difficult to open - as if they are suctioned shut.
The heater is fired and then turned off. The lid is removed and hot gases come
back into the heater box.
An incline manometer is set up with one hose outside of the building and one inside.
It's reading confirms a negative inside pressure.
Turn power off.
Disconnect both black wires attached to the safety switches with a 1/4" female spade.
Attach them to each other using alligator clips or electrical tape.
Be sure this connection touches nothing else, especially metal.
Turn power back on (Do not leave switches bypassed during normal heater operation).

HOW TO...

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