ECONOMIZER DAMPER MOTOR — On units so equipped,
the economizer motor is located in the mixing box section.
Access to it is through the doors labeled FILTER SECTION
on the sides of the unit.
ELECTRIC HEATER CONTROL BOX (50 Series Units Only)
— Access to the electric heater control box is through the
door on the right side of the unit next to the condenser sec-
tion. See Fig. 16 and 17.
The electric heater control box contains:
• power terminal block HTB, HTB1, HTB2 (not used on all
voltages)
• fuse blocks FB1, FB2, etc.
• fuses FU (3 per fuse block)
• heater contactors HC1, HC1A, etc.
• plug No. 20 (PL20)
HEATER BOX (50 Series Units Only) — Access to the heater
box is through the door on the left side (sizes 034 and 044)
or right side (sizes 054-074) of the unit next to the con-
denser section. See Fig. 16 and 17. See Fig. 42 for heater
box contents.
NOTE: High heat consists of sections 1 and 2.
Low heat consists of section 1 only.
Fig. 37 — Gas Section Detail, 48 Series 034 and
044 Units
NOTE: High heat consists of sections 1-3.
Low heat consists of section 1 and 2 only.
Fig. 38 — Gas Section Detail, 48 Series 054-074 Units
Fig. 39 — Burner Section Detail (48 Series Units Only)
Fig. 40 — Flue Box Assembly, 48 Series Units Only
(Shown with Burner Assembly)
Fig. 41 — Combustion Blower Removal
44
Summary of Contents for 48DJ
Page 58: ...Fig 66 Gas Heat Sections 48DJ NP034 044 Units 58...
Page 59: ...Fig 67 Gas Heat Sections 48DJ NP054 074 Units 59...
Page 60: ...Fig 68 Gas Heat Section 48DK034 044 Units 60...
Page 61: ...Fig 69 Gas Heat Section 48DK054 074 Units 61...
Page 62: ...Fig 70 Typical Wiring Schematic 48 50DJ 50DW Units 054 074 Shown 62...
Page 63: ...Fig 70 Typical Wiring Schematic 48 50DJ 50DW Units 054 074 Shown cont 63...
Page 64: ...Fig 71 Typical Wiring Schematic 48 50DK 50DY Units 054 074 Shown 64...
Page 65: ...Fig 71 Typical Wiring Schematic 48 50DK 50DY Units 054 074 Shown cont 65...
Page 66: ...Fig 72 Typical Control Wiring Schematic 48 50NP 50NB Units 054 074 Shown 66...
Page 67: ...Fig 72 Typical Control Wiring Schematic 48 50NP 50NB Units 054 074 Shown cont 67...
Page 68: ...Fig 72 Typical Control Wiring Schematic 48 50NP 50NB Units 054 074 Shown cont 68...
Page 69: ...Fig 73 Typical Power Wiring Schematic 48 50NP 50NB Units 054 074 208 230 and 460 v Shown 69...
Page 71: ......