Important Information; Maintenance Instructions - Carrier 58CTA Installation And Service Instructions Manual

Important Information

Addendum to the Installation, Start-up, and Operating and

Maintenance Instructions

Series 110 or Series B 33 1/3" Mid-Efficiency Furnaces
This furnace is equipped with the White-Rodgers Series G valve. This instruction
sheet is to familiarize you with Series G gas valve and to be used to check and
adjust gas pressure for proper installation and start-up.
This sheet will be used to complete the "Adjustments" section of the "Start-up Procedures"
section of the Installation, Start-up, Operating and Maintenance Instructions.
See Fig. 1 for two-stage gas valve. This version of the G valve has standard 1/8" NPT inlet and
outlet pressure taps that are removed with a 3/16" hex head wrench for connection to a
manometers and Low Gas Pressure Switch (when used). For conversions to propane gas, refer to
the instructions in the Natural to Propane Conversion Kit, KGANP3001ALL.
Fig. 1-Two-Stage Gas Valve
The major difference in the two-stage G valve, besides the compact design, is the location of the
Low and High stage regulators. Both regulators are located on top of the valve and are marked
"Lo" and "Hi" next to the regulator seal caps. Both regulator springs are adjusted with a standard
3/16" or smaller flat-tipped screwdriver.
The other difference is the G series valve IS NOT a dual-fuel gas valve. Conversions to propane
will require the replacement of BOTH regulator adjustment springs. The Low stage and High
stage springs are identical to each other and the 2 springs are included in the Natural to Propane
Conversion Kit, KGANP3001ALL
IMPORTANT:
This sheet MUST be inserted into the Installation, Start-up, Operating and Maintenance
Instructions and left with the furnace.
58CTV-1SI/II 312AJ-45-1