Reznor MAPSII Series REDA Users Manual - Manual (Page 4)

Form O-MAPS II, P/N 209179 R7, Page 4
WARNING: Turn off the power before performing all maintenance procedures (except to
check refrigerant pressure and temperature). Lock disconnect switch in OFF position. If the
system has a heat section, when you turn off the power supply, turn off the gas. See Hazard
Levels, page 3.
NOTE: If replacement parts are required, use only factory-authorized parts.
For information, call 800-695-1901 or go to www.RezSpec.com
Models RDCA & RDDA with a gas-fired heat section (beginning of the
heating season) - See Paragraph 9.:
NOTE: If equipped with an optional Model JHUP curb duct furnace,
these same maintenance procedures apply to the duct furnace.
 Clean all dirt and grease from the combustion air openings and venter
assembly.
 Check the burner and heat exchanger for scale, dust, or lint accumulation.
Clean as needed.
 Check the gas valves to ensure that gas flow is being shutoff completely.
Models RECA & REDA with an electric heat section (beginning of the
heating season) - See Paragraph 10.
 Check the wiring connections.
 Check the heat section and elements for dust or lint accumulation. Care-
fully clean as needed.
2.0 Maintenance
Requirements
(cont'd)
Maintenance
Schedule (cont'd)
TUBING SECTION
• Low Refrigerant Pressure Cutouts
• High Refrigerant Pressure Cutouts
• Filter Driers
• Liquid Line Service Gauge Ports
COMPRESSOR SECTION
• Ckt A Compressor
• Ckt B Compressor
• Ckt C Compressor
• Discharge & Suction Service Ports
• Optional Hot Gas Bypass Valve(s)
HIGH VOLTAGE ELECTRICAL
COMPARTMENT
1) Blower Motor Contactor or Starter
2) Control Transformers (as required)
3) Dehumidification Compressor
Contactor (RDA, RDDA, REDA)
4) Condenser/Compressor Contactor
5) Optional Phase Loss/Phase Rever-
sal Control (optional beginning
10/05; standard prior to 10/05)
6) Optional Damper Motor
Transformer
7) Optional Over/Under Voltage
Control
8A&B) Condenser Motor Capacitors
9) Optional Convenience Outlet
(requires separate supply line)
AUXILIARY COMPARTMENT
10) Digital Controller (FX05 or FX06)
• Optional Damper Motor
• Outside Air Relative Humid-
ity Transmitter (Std RDA/
RDDA/REDA; Optional
RCA/RDCA/RECA)
Models RDCA & RDDA With Gas
Heat Section (FIGURE 1A only):
21) Venter Assembly
22) Single-Stage Gas Valves
23) Optional Modulating Gas Valve
24) Optional Low Gas pressure
Switch
25) Optional High Gas Pressure
Switch
Models RECA & REDA With
Electric Heat Section (FIGURE
1B only):
26) Fuse Block/Fuses
27) Contactor
28) Low Voltage Terminals
29) Manual Reset Limit
30) Auto Reset Limit
FIELD INSTALLED
• Discharge Air Sensor (supply duct)
• Optional Return Air Firestat (duct)
• Optional Discharge Air Firestat
(duct)
• Optional Smoke Detector (duct)
• Optional wall-mounted controls
11) Air Proving Pressure Switch
12&13) Optional Control Relays
14) Optional Dirty Filter Switch
15) Optional Time Clock or BAS Card
16) Humidity Input Converter
Models RDCA & RDDA With Gas
Heat Section (FIGURE 20 only):
17) Combustion Air Pressure Switch
18) Ignition Control
19) Optional Power Signal Converter
20) Venter Motor Capacitor (line
voltage)
BLOWER SECTION
• Blower Motor
Models RDCA & RDDA With Gas
Heat Section (FIGURE 1A only):
• Limit Control (capillary type)
COIL SECTION
• Evaporator Coils
• Thermal Expansion Valves
• Froststat (one per cooling circuit)
• Optional Subcooling Valves
(RCA/RDCA/RECA)
FILTER AND INLET AIR
SECTION
• Inlet Air, Humidity, & Override
Sensors
• Ckt D or Dh Compressor