Reznor EEDU Unit Installation Manual - Manual (Page 5)

Form I-EEDU, P/N 150492 R6, Page 5
Heating -- Gas
Control Option
Option AG7 - Amplifier, P/N 260863; Thermostat, P/N 48033
Makeup Air --
Control Options
(All of the makeup
air options also
require a shipped-
separate fan control,
Option CQ1 (P/N
57960), which
should be at the job
site.)
Option AG3 - Control Switch, P/N 29054; Gasket, P/N 7726; Gasket Retainer Plate, P/N 7727
Option AG8 - Temperature Sensor and Mixing Tube, P/N 48041; Amplifier, P/N 260864; Control
Switch, P/N 29054
Option AG9 - Remote Temperature Selector, P/N 48042; Temperature Sensor and Mixing Tube,
P/N 48041; Amplifier, P/N 260863; Control Switch, P/N 29054
Option AG15 - Remote Temperature Selector, P/N 115848; Stage Adder Module, P/N 115849;
Control Switch, P/N 29054; Transformer 115 to 24V, P/N 103055 or 208/230 to 24V, P/N 103497;
and 1/2" locknut, P/N 16222 (for transformer); Discharge Sensor Holder, P/N 115850; Discharge
Air Sensor Holder Bracket, P/N 213612
Option AG21 - Signal Conditioner, P/N 134170; Conditioner Relay, P/N 14747; Transformer 115
to 24V, P/N 103055; Fuse Box, P/N 12697; Fuse Box Cover, P/N 12698;
(3) Hole Plugs, P/N 16451; Transformer Locknut, P/N 16222
Other shipped-separate options could include a gas shutoff valve, a vent cap, a con-
densate drain fitting, a thermostat, a hanger kit, a coupling kit, and/or a fan control.
Option Parts -- Some gas
control options will have
parts either shipped loose
with the heater or shipped
separately. If your unit is
equipped with any of the
gas control options in the
table, be sure these parts
are available at the job site.
3.2.1 Converting
Furnace for Higher CFM
Application
This furnace was factory assembled with the air throughput range listed on the rating
plate. If the application requires a higher CFM than listed on the rating plate, refer to
the requirements and instructions in the APPENDIX, page 30.
1. Refer to FIGURE 2A. Remove the screws attaching the limit control bracket to the
side of the furnace. Carefully pull the bracket/control assembly through the hole. (Do
not disconnect wires.)
FIGURE 2A - Limit
Control Location -
When reversing airflow,
the limit control must
be re-located. The limit
control MUST be on the
discharge end of the
heat exchanger
Location of the factory-
installed Limit Control
Bracket on a Furnace with
Standard Airflow Direction
Duct furnaces are equipped with directional air baffles between the heat exchanger
tubes. Facing the control compartment of the furnace, the standard direction of airflow
is from the rear of the furnace (gas valve location) toward the front of the furnace. If the
installation site requires airflow from the front to the rear, the unit may be field adapted
by re-locating the limit control and reversing the position of the directional air baffles.
Instructions for Reversing Airflow
2. Refer to FIGURE 2B and follow Steps a)-d) to reverse the direction of the baffles.
Top Baffle
Support
Screws B
Bottom
Baffle Support
Bracket
s
Air Discharge
Direction of
Airflow
Screw C
Right
Lef
t
Screws A
Screw C
Airflow
Baffles
a) Remove Screws "A". Individually lift each baffle slightly
and slide forward. Remove all baffles completely from the
heat exchanger.
b) Remove Screws "B" and the top baffle support assembly.
Re-position the assembly on the opposite end of the heat
exchanger and attach.
c) Remove Screws "C" and the assembled bottom baffle
support and brackets. Plug the holes in the heat
exchanger bottom by re-inserting the screws in the holes.
Position the assembly on the opposite end of the heat
exchanger and attach using field-supplied sheetmetal
screws.
d) Re-install all of the individual baffles by reversing
procedure in Step a) above.
FIGURE 2B -
Model EEDU
has a top
and bottom
support
assembly
and
individual
baffles.
3. Relocate the limit control.
a) At the discharge end on the same side of the heat exchanger, measure down
4-1/2" (114mm) and across 1-11/16" (43mm). Using that point as the center, punch
a 2-1/4" (57mm) diameter hole in the side panel.
NOTE: It may be necessary to move cable connections. Re-insert screws to plug all
holes in the side panel. After the limit control is installed, the cable connections may be
re-attached using field-supplied sheetmetal screws.
3.2.2 Instructions for
Reversing Airflow by
Changing Directional
Air Baffles in the Heat
Exchanger
NOTE: If the unit has optional outer
side panels, locate the limit control and
remove the outer panel on that side of
the furnace.