Thermo Pride CDX3-125N - Manual

All installations and services must be performed by qualified service personnel. 7 These furnaces may be installed in an alcove or in a closet if the minimum clearances to combustible construction (listed previously) are met. The CDX3 series furnaces may be installed in an attic or crawl space. Refe...

All installations and services must be performed by qualified service personnel. 8 For a right side horizontal application of the CDX3 series units, the auxiliary limit switch located on the right side of the house air blower must be moved to the bracket on the opposite (left) side of the blower (Se...

All installations and services must be performed by qualified service personnel. 9 The horizontal furnace installation should be on a service platform large enough to allow for proper clearances on all sides and service access to the front of the furnace (See Table 1). If the furnace is suspended, i...

All installations and services must be performed by qualified service personnel. 11 NOTICE: DO NOT use silicone caulk to seal the pipe sleeve or coupling to the metal air intake collar on the burner box. Securing the sleeve or coupling to the collar using a screw is sufficient. 10. Vent connections ...

All installations and services must be performed by qualified service personnel. 12 b. The bottom edge of the vent termination elbow must be installed at least 12-inches above the outlet of intake termination elbow. c. The horizontal distance between the inlet and exhaust terminations should be mini...

All installations and services must be performed by qualified service personnel. 14 : Bushes, shrubs, or any vegetation that may restrict the flow of flue products must be kept away from vent and air intake terminations. Terminations must also be kept clear of any leaves, weeds, combustible material...

All installations and services must be performed by qualified service personnel. 15 2. Measure and cut two (2), 2-inch diameter thermoplastic pipes 1-1/2 inches longer than the depth of the wall. Cutting the pipe longer leaves a ¾ inch connection allowance at both ends of the pipe. (For 3-inch diame...

All installations and services must be performed by qualified service personnel. 16 Install these optional kits according to the instructions provided with each kit. The location and clearance requirements are identical to those of the standard vent terminations described in this manual. Figure 6: O...

All installations and services must be performed by qualified service personnel. 21 NOTICE: All PVC thermoplastic pipe must be supported beginning directly over the exhaust vent tee assembly, then every 4-feet thereafter, and at every joint. Trial fit the entire exhaust vent and air intake piping sy...

All installations and services must be performed by qualified service personnel. 22 DO NOT! SILICONE OR SEAL THIS CONNECTION IN ANYWAY. MUST BE LOOSE FIT WITH LEAKAGE BETWEEN PVC AND METAL COLLAR. Figure 12: Typical Internal Air Intake Piping Arrangement for All Furnace Models d. After trial fitting...

All installations and services must be performed by qualified service personnel. 23 Figure 15. TRAP ASSEMBLY MOUNTED ON CDX3 Figure 16. TRAP ASSEMBLY MOUNTED ON CDX3 RIGHT SIDE HORIZONTAL INSTALLATION

All installations and services must be performed by qualified service personnel. 24 2. Determine on which side of furnace the condensate disposal line is to be run (NOTICE: On CHX3/CDX3’s this must be the same side as the flue outlet or bottom of unit). Attach the condensate trap to the furnace casi...

All installations and services must be performed by qualified service personnel. 26 : Care must be taken not to wet electronic components during leak test. Wetting the primary ignition module may damage its circuitry and cause a hazardous situation. Dry moisture from all leads and terminals if wetti...

All installations and services must be performed by qualified service personnel. 31 FORMULA: (tons of cooling) x (400 CFM per ton) (144 square inches per foot) = filter area sq.inches (max. air velocity of filter from table 3 for the filter type) = length x width of filter in inches EXAMPLE: If you ...

All installations and services must be performed by qualified service personnel. 32 3. THERMOSTAT CONNECTIONS AND ANTICIPATOR SETTING NOTICE: For two-stage thermostat wire connectors see wire diagram page 59. For single-stage thermostat with two-stage operation connect W from thermostat to W 1 on co...

All installations and services must be performed by qualified service personnel. 33 4. BLOWER AND CONTROL PANEL WIRING Figure 21 : TURN OFF THE ELECTRICAL POWER to the furnace before attempting to disconnect blower wiring. Table 4B Options S7-1 S7-2 Time Off Off Off * On Off 10 Min Off On Auto On On...

All installations and services must be performed by qualified service personnel. 34 Modifications to ECM blower speed settings are done using the S3 and S4 dip switch controls. Thermo Pride two-stage furnaces are factory shipped at the CFM settings listed below in Table 4C. 2-Stage Blower Settings (...

All installations and services must be performed by qualified service personnel. 41 5. To obtain an accurate manifold gas pressure reading, the main burner must be cycled on and off several times to stabilize the gas control valve pressure regulator diaphragm. 6. Allow the burner to operate for at l...

All installations and services must be performed by qualified service personnel. 44 This furnace is designed not to require any burner adjustment. Burner aeration is fixed in this design. Burner flames can be seen by looking through the sight glass located on the burner box. Burner flames should be ...

All installations and services must be performed by qualified service personnel. 45 TIME (sec.) FLOW (cfh) TABLE 6 - CONVERTING GAS FLOW RATE 40 90 41 88 * For one cubic foot per revolution gas meter dials, 42 86 use Table directly. 44 82 45 80 * For 1/2 cubic foot per revolution gas meter dials: 46...

All installations and services must be performed by qualified service personnel. 46 D. FURNACE CHECKOUT PROCEDURE Before any system of gas piping is finally put into service, it shall be carefully tested to assure that it is gas tight as indicated in the manual. NOTICE: All controls on the unit shou...

All installations and services must be performed by qualified service personnel. 48 memory, the LED will flash two green flashes. The control will flash the most recent error first and the oldest error last (last in first out). There will be 2 seconds between codes. Solid LED error codes will not be...

All installations and services must be performed by qualified service personnel. 58 Appendix – B W iring Diagrams