25% OUTDOOR-AIR DAMPER — See Manual Outdoor-
Air Damper section on page 10 for adjustment details.
REFRIGERANT CHARGE — All units are shipped with a
complete operating charge of R-22. See unit nameplate and
Tables 1A and 1B for amount of charge. When adding a com-
plete charge, evacuate system using standard evacuating pro-
cedures and weigh in the specified amount of charge. All
units have charging charts for each refrigerant circuit. See
Fig. 46-59.
PILOT LIGHT OFF (48NP Units Only) — If pilots do not
light as described in Heating section on page 41, be sure that
pilot orifice is unobstructed, then check for spark ignitor mal-
functions as follows:
1. Turn off the control circuit breaker (CCB) to shut off con-
trol supply power to ignitor control pack (ICP).
2. Check that spark gap is
3
⁄
8
in.
6
1
⁄
32
inch.
3. Check that ICP is securely grounded.
4. Check that the high-voltage lead is securely connected
between the ICP and the electrode body.
5. Turn on CCB to restore power to ICP. Check that 24 v is
supplied to terminal TH of the ICP.
6. Check unit label diagram for correct terminal usage if any
wires are removed.
Fig. 45 — Pulley Alignment
Fig. 46 — Charging Chart, 034 Units; System 1,
One Condenser Fan Running
Fig. 47 — Charging Chart, 034 Units; System 1,
All Condenser Fans Running
Fig. 48 — Charging Chart, 034 Units; System 2,
One Condenser Fan Running
47
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: ......