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Thermo Products
CDX1-100N, CDX1-75N, CHX1-125N, CHX1-75N, CHX1-100N, CDX1-125N operation manual
Models:
CDX1-100N
CDX1-125N
CHX1-100N
CHX1-75N
CHX1-125N
CDX1-75N
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Troubleshooting
Specifications
Install
Parts list
Appendix - B Wiring Diagrams
Connecting The Exhaust Vent To The Inducer
Diagnostic Features
I. Condensate Drain Line And Trap Assembly
Go to Checkout Procedure below
Measuring And Adjusting Heat Input Rate
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All installations and services must be performed by qualified service personnel.
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Contents
TWO STAGE CONDENSING GAS FURNACE
MODELS
OR LP GAS PROPANE CDX1-75N CDX1-100N CDX1-125N
I. SAFETY INFORMATION
This and the previous page contain reproductions of the various warning and instruction labels placed on the Thermo Pride Two Stage Condensing Gas Furnaces. Please read and comply with the contents of these labels
1.A windows be opened
Page
BEGINNING PAGE
INDEX
SECTION
II. FURNACE SPECIFICATIONS CHX1 SERIES
CDX1 SERIES
INSTALLATION PARTS PACKAGES - CHX1-75
PART #
INSTALLATION PARTS PACKAGES - CDX1-75
PARTS PACKAGE
DESCRIPTION
PART #
INSTALLATION PARTS PACKAGES - CDX1-100-125
PARTS PACKAGE
DESCRIPTION
III. GENERAL INSTALLATION
B1. CDX1 HORIZONTAL APPLICATION
B. FURNACE LOCATION
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MAXIMUM VENT LENGTH TABLE
D. GENERAL REQUIREMENTS FOR VENTING CHX1/CDX1
E. SIDEWALL VENTING
Figure 3. VENT TERMINAL LOCATION REQUIREMENTS
E1. SINGLE PIPE SIDEWALL VENTING OPTION
VENT TERMINAL LOCATION GUIDELINES
Optional Terminations
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2. CONNECTING THE EXHAUST VENT TO THE INDUCER
Figure Figure Figure
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Figure 15. TRAP ASSEMBLY MOUNTED ON CDX1
I. CONDENSATE DRAIN LINE AND TRAP ASSEMBLY
Figure 14. TRAP ASSEMBLY MOUNTED ON CHX1
2.Determine on which side of furnace the condensate disposal line is to be run NOTICE On CHX1/CDX1’s this must be the same side as the flue outlet or bottom of unit. Attach the condensate trap to the furnace casing using the #8x3/4” sheet metal screws provided in the parts package. Pilot holes are provided on both sides of the casing for mounting
J. GENERAL GAS PIPING
K. FILTERS 1. CHX1 MODELS: HIGHBOYS
2. CDX1 MODELS COUNTERFLOWS
3. USE OF NON-THERMOPRIDE FILTER RETENTION MEANS
3. THERMOSTAT CONNECTIONS AND ANTICIPATOR SETTING
4.BLOWER AND CONTROL PANEL WIRING Figure
2-StageBlower Settings from factory Table
IV. STARTING THE UNIT A. SEQUENCE OF OPERATIONS
FLAME MUST BE DETECTED
IF SYSTEM IS IN LOCKOUT
OPERATING INSTRUCTIONS
B. INITIAL START UP
B.Gas flowrate by clocking gas meter
Measuring And Adjusting Heat Input Rate
Observe the following precautions when measuring
A.Burner manifold pressure with a pressure gauge
NOTICE A U-tubemanometer, measuring pressure in inches of water column, is recommended for all gas pressure measurements. However, an aneroid pressure gauge, in good working condition, capable of reading pressure changes of 0.05 in. W.G., or less, that was recently calibrated within the last year, is a satisfactory alternate. These two 2 devices will be considered as equivalent and interchangeable. Either device is referred to below as a “pressure gauge”
Fuel gas flowrate in CFH =
Heat input rate in BTUH =
Fuel gas higher heating value ç in
Fuel gas flowrate in CFH
Operating Mode, and Type of Fuel
21.Go to Checkout Procedure below
Checkout Procedure
TABLE 6 - CONVERTING GAS FLOW RATE
V. INSTALLERS INSTRUCTIONS TO USER
C. FURNACE CHECKOUT PROCEDURE
Figure VI. TROUBLESHOOTING
Power must be disconnected before servicing
DIAGNOSTIC FEATURES
TROUBLESHOOTING GUIDE
IS INDUCER RUNNING ON LOW SPEED? YES DOES THE HOT
DO BURNERS STAY LIT PAST PROOF OF FLAME CHECK?
REPLACE THE 50V61-143CONTROL
WHEN THERMOSTAT IS
Appendix -AReplacement Parts List
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Appendix - B Wiring Diagrams
