Carrier 58PB - Step 8 - Install Filters; Step 9 - Reverse Components (if Required)

HEATING & COOLING
58ED,PB
Horizontal Gas-Fired Furnaces
Use only copper wire for 115 v supply service to
furnace. When replacing any original wiring, use only
105 C, 16 gage AWG copper wire.
Instructions for wiring the thermostat are packaged
with the thermostat (field supplied). Make connections
as shown in wiring labels at the 24 v terminal board
located on the electrical junction box. When installing
accessories to this furnace, follow manufacturer’s
instructions included with the accessory Except for
thermostat wiring, a minimum of typeT (63 F rise) must
be used.
Step 8 — Install Filters — Filters and racks are
available as accessories. See Fig. 8 for recommended
filter size rating and type.
IMPORTANT: All furnaces must be equipped with
a filter.
Step 9 — Reverse Components (if required).
A WARNING
Before proceeding with component reversal, make
sure that all power is turned off upstream of furnace
and all gas piping is shut off and disconnected from
furnace.
A CAUTION
Before proceeding with field reversing, ensure a
correct wiring diagram is available and/or be
prepared to mark all wiring as it is disconnected.
INPUT
A
(1000 BTUH)
(IN)
50
144
75
100
161
125
20 4
140
CJl
C*»
NOTE:
FILTER RACK TO INLET
END OF FURNACE INSTALLED
INTO RETURN DUCTWORK.
Fig. 8 — Accessory Filter Rack Assembly
All references to left or right side of furnace refer to
the furnace looking at the heat exchanger (supply
air side).
The gas valve, pilot burner components and controls
may be reversed as follows:
1 Loosen burner removal cover screws and remove
both covers
2 Disconnect all wires to gas valve and unplug the
igniter cable from the ignition control (if so
equipped).
3. Remove the manifold locking device and slide the
burner and manifold assembly back towards the
furnace inlet until the burners are clear of the heat
exchanger tubes. See Fig. 5.
4. Slide manifold assembly towards the front of furnace .
until it clears the blower deck.
NOTE: Keep manifold assembly straight while
removing. If manifold is cocked, then the assembly
will bind in burner box.
5. Place manifold on a work area and disconnect the
pilot tubing and thermocouple, if equipped, from the
valve
6. Using 2 pipe wrenches (one on the gas valve and
one on the manifold extension pipe), remove the
gas valve
7. Remove the manifold extension pipe from the
manifold (it may be necessary to put a pipe wrench
on the manifold pipe while turning the extension).
8. Using 2 pipe wrenches (one on the manifold pipe
between the pipe cap and burner orifices and one on
the pipe cap), remove the pipe cap.
9. Clean the threads on manifold pipes, gas valve and
pipe cap of any old pipe dope.
NOTE: Use a joint compound (pipe dope) resistant
to the action of liquefied petroleum gases or to any
other chemical constituents of the gases to be
conducted through the piping.
10. Using a suitable joint compound and 2 pipe
wrenches, replace the manifold pipe extension where
the pipe cap was. The pipe extension should be
tightened and positioned so that it is pointing
towards the back of the burners.
11. Using 2 pipe wrenches (one on the manifold exten¬
sion and the other on the gas valve), tighten gas
valve to the extension and position the valve so that
the manual knob is in the 12 o’clock position
12. Using 2 pipe wrenches (one on the pipe cap and the
other on the manifold pipe), tighten the pipe cap to
the other end of the manifold pipe
13. Remove the screws holding the pilot bracket to the
crossovers of the first 2 burners When removing
pilot assembly, be careful not to damage the pilot
gas tubing and ignition cable (or thermocouple, if so
equipped).
NOTE This step is not required foi 050 size, as
there are only 2 burners
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book I I 1 4 PC 101 Catalog No 535-834 Printed in U S A Form 58ED.PB-1SI Pgll 6-85 Replaces: 58PB-1SI
Tab 16a 1 8 a For replacement items use Carrier Specilied Parts