Reznor PDH Operation Manual PreevA - Manual (Page 4)

Form O-PreevA, Page 4
NOTES: If replacement parts are required, use only factory-authorized parts.
For information, go to www.RezSpec.com or call (800) 695-1901.
T he following procedures should be carried out at least annually. The heating
section should be inspected and cleaned at the beginning of the heating sea-
son. The cooling section should be inspected and cleaned at the beginning of
the cooling season. See FIGURE 1A, for Model SDH, PDH, SHH, RDH, PXH,
RHH, and RXH control locations in the electrical compartment. See FIGURE
1B, page 6, for control locations in Models PEH and REH. See the paragraphs
indicated in the schedule for maintenance procedure information.
Basic Heat Section, Blower Section, and Optional Modules
All Models -
 Check the filters. Clean or replace as needed. (Paragraph 3.1)
 C
lean all dirt, lint, and grease from the motor and blower,
 Check the belt for tension and wear. Replace a belt that may fail before
next scheduled maintenance. (Paragraph 3.2)
 Check all wiring for any damaged wire. Replace damaged wiring. Check
the unit wiring diagram for requirements.
 Systems with Option AR8 (dampers/no mixing box) - Check the dampers;
clean as needed. (Paragraph 3.6)
Gas-Fired Models PDH, SDH, SHH, RDH, and RHH -
 Clean all dirt, lint, and grease from the venter assembly.
 Check the heat exchanger both internally and externally. (Paragraph 3.4.1)
 Check the burner for scale, dust, or lint accumulation. Clean if needed.
(Paragraph 3.4.2)
 Check the gas valve to ensure that gas flow is being shutoff completely.
(Paragraph 3.4.6)
 Check the vent or vent/combustion air system for soundness. Clean
openings. Replace any parts that do not appear sound.
 Clean the heat section condensate drain line (two on Models RHH and
SHH; one on other models with Option CS2).
 Model SHH - Clean the vent condensate drain line.
Electric Heat Models PEH and REH
 Clean all dirt, lint, and grease from the heating elements and heat section
cabinet.
Optional Mixing Box - See Paragraph 3.6
 Check the mixing box and dampers. Clean as needed.
Optional Cooling Coil Module - See Paragraph 3.7
 Clean the condensate pan and drain.
 Clean the cooling coil.
Optional Evaporative Cooling Module - See Paragraph 3.8
 Clean or replace the media. Clean the optional filters.
 Flush the water distribution line.
 Clean the pump screen and pump (pump and float system).
2.1 Maintenance
Schedule
2.0 Maintenance and Service Information (cont’d)