NOTE:
As a result of staged heating with single-speed furnaces, the air temperature distribution in the supply plenum may be uneven when only
1 furnace is heating.
NOTE:
Refer to the Installation, Start-Up, and Operating Instructions supplied with each furnace for information on venting, clearances, start-up,
maintenance, and other information not covered in this publication.
See Table 1 for kit contents.
ELECTROSTATIC DISCHARGE (ESD) PRECAUTION
CAUTION: UNIT AND COMPONENT DAMAGE HAZARD
Failure to follow this caution could result in unit and component damage.
Electrostatic discharge can affect electronic components. Take precautions during furnace installation and servicing to protect the
furnace electronic control. Precautions will prevent electrostatic discharges from personnel and hand tools which are held during the
procedure. These precautions will help to avoid exposing the control to electrostatic discharge by putting the furnace, the control, and
the person at the same electrostatic potential.
1. Disconnect all power to the furnace. DO NOT TOUCH THE CONTROL OR
ANY
WIRE CONNECTED TO THE CONTROL PRIOR
TO DISCHARGING YOUR BODY’S ELECTROSTATIC CHARGE TO GROUND.
2. Firmly touch a clean, unpainted, metal surface of the furnace chassis which is close to the control. Tools held in a person’s hand during
grounding will be satisfactorily discharged.
3. After touching the chassis you may proceed to service the control or connecting wires as long as you do nothing that recharges your body
with static electricity (for example; DO NOT move or shuffle your feet, DO NOT touch ungrounded objects, etc.).
4. If you touch ungrounded objects (recharge your body with static electricity), firmly touch furnace again before touching control or wires.
5. Use this procedure for installed and uninstalled (ungrounded) furnaces.
6. Before removing a new control from its container, discharge your body’s electrostatic charge to ground to protect the control from damage.
If the control is to be installed in a furnace, follow items 1 through 5 before bringing the control or yourself into contact with the furnace.
Put all used AND new controls into containers before touching ungrounded objects.
7. An ESD service kit (available from commercial sources) may also be used to prevent ESD damage.
SECTION I: MULTIPOISE SINGLE-SPEED AND TWO-SPEED NON-CONDENSING HSI FURNACE MODELS
SINGLE-STAGE
SINGLE-STAGE
TWO-STAGE
TWO-STAGE
58STA
310AAV
58CTA
312AAV
58STX
310JAV
58CTX
312JAV
58DLA
311AAV
58DLX
311JAV
PG8MAA
NOTE:
Throughout these instructions, when the furnace installed side-by-side, the left-hand (LH) side will be referred to as the LH furnace, and
the furnace installed on the right-hand (RH) side as the RH furnace. When the furnaces are installed back-to-back, the left-hand (LH) side will
be referred to as the LH furnace, and the furnace installed on the right-hand (RH) side as the RH furnace when viewed from the side with the
extension harness installed.
PROCEDURE 1—INSTALL FURNACES
A.
Upflow/Downflow, Side-by-Side Position
Refer to Fig. 3 and Table 2 for appearance and dimensional drawing of twinned furnaces and their connection locations.
1. Select 2 identical heating and airflow furnaces. (See Table 2.)
Table 1—Kit Contents
Sealing tape
2
External extension harness
327957-701
1
Main twinning harness
327957-701
1
Secondary twinning harness
327959-701
1
Two stage furnace wiring diagram
327891-101
1
Single Stage furnace heat wiring diagram
327893-101
1
Single Stage furnace/Two stage heat wiring diagram
327892-101
1
Label
327956-101
1
Tape
1
Bag Assembly includes:
Snap bushing
2
Screws (HEX HD 6B X 3/4)
10
Bag Assembly Includes:
Snap bushing
2
Screws (HEX HD 6B x 3/4)
10
Screws (flat head)
1
Wire tie
4
Clamps
2
Installation Instructions
1
—4—
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