Voyager 2 Modulating Gas Manifold Pressure

Quick Answer

1. If the ambient temperature is greater than 60 Fº adjust the gas pressure to +0.050” I.W.C.
2. If the ambient temperature is less than 60 Fº adjust the gas pressure to +0.065” I.W.C.

Required Tools

• Voltmeter
• Manometer capable of measuring in .001" I.W.C. increments, typical digital meters can not read accurately this low
• Snap ring pliers
• Jumper wire
• Temperature gauge

Steps

1. Using the snap ring pliers remove the tamper-resistant cap from the gas valve to gain access
   to the gas pressure adjustment screw.
   
   Text in image above
   • Remove tamper resistant cap with snap ring pliers. With unit running at high speed make appropriate gas pressure adjustment. 

2. Attach the liquid manometer gauge to the manifold (outlet) port of the gas valve.

3. Power the unit up and place the unit in the 2nd stage heating sequence by utilizing the Test
   Mode function. 
4. Allow the unit to settle out by allowing it to run at the high fire for 10-15 minutes before attempting
   any adjustments. Verify that the unit is running at high fire, by measuring the voltage between J5-1 and J5-2 on the RTOM board. Voltage should read approximately 10.5 VDC.
   
   Text in image above
   • Take measurement at J5 on the RTOM board while motor is operating at high speed. Measurement should read approximately 10.5 VDC.
5. Gas pressures should be adjusted as follows:
   1. If the ambient temperature is greater than 60 Fº adjust the gas pressure to +0.050” I.W.C.

   2. If the ambient temperature is less than 60 Fº adjust the gas pressure to +0.065” I.W.C.

6. Remove the unit from the test mode by shorting Test 1 and Test 2 for three seconds one time
   or by cycling power to the unit. LED2 on the RTRM module should now be solid green.
7. Adjust unit controls to bring on a normal call for heat from the thermostat, zone sensor, or BAS. 
   • If no issue exists re-install the tamper-resistant cap.

WARNING:

Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.