edition of the National Standard of Canada CAN/CGA-B149.1-
and .2-M91 Natural Gas and Propane Installation Codes (NSC-
NGPIC). Wear safety glasses and work gloves. Have fire extin-
guisher available during start-up and adjustment procedures and
service calls.
Recognize safety information. This is the safety-alert symbol
.
When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, and CAU-
TION. These words are used with the safety-alert symbol. DAN-
GER identifies the most serious hazards which will result in severe
personal injury or death. WARNING signifies a hazard which
could result in personal injury or death. CAUTION is used to
identify unsafe practices which would result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability,
or operation.
These instructions cover minimum requirements and conform to
existing national standards and safety codes. In some instances,
these instructions exceed certain local codes and ordinances,
especially those that may not have kept up with changing residen-
tial construction practices. We require these instructions as a
minimum for a safe installation.
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
PROCEDURE
Electrostatic discharge can affect electronic components.
Take precautions during furnace installation and servicing to
protect the furnace electronic control. Precautions will pre-
vent 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 CON-
TROL PRIOR TO DISCHARGING YOUR BODY’S ELEC-
TROSTATIC 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.).
Table 2—Dimensions (In.)
UNIT SIZE
A
D
E
VENT CONN
SHIP. WT (LB)
050-08
14-3/16
12-9/16
12-11/16
4
124
050-12
14-3/16
12-9/16
12-11/16
4
127
070-08
14-3/16
12-9/16
12-11/16
4
141
070-12
14-3/16
12-9/16
12-11/16
4
145
096-12
17-1/2
15-7/8
16
4
154
096-16
17-1/2
15-7/8
16
4
154
115-16
17-1/2
15-7/8
16
4
171
115-20
21
19-3/8
19-1/2
4
181
135-20
24-1/2
22-7/8
23
5
192
Fig. 1—Dimensional Drawing
A88324
4
3
⁄
16
″
2
″
2
15
⁄
16
″
13
⁄
16
″
11
⁄
16
″
9
1
⁄
8
″
10
1
⁄
4
″
1
1
⁄
16
″
2
1
⁄
8
″
8
1
⁄
4
″
10
1
⁄
4
″
1
1
⁄
16
″
2
1
⁄
8
″
16
1
⁄
16
″
13
5
⁄
16
″
19
″
11
⁄
16
″
13
⁄
16
″
11
⁄
16
″
20
″
28
1
⁄
2
″
39
7
⁄
8
″
D
5
⁄
8
″
TYP
1
″
TYP
E
A
AIRFLOW
OUTLET
INLET
1
⁄
2
″
DIA
THERMOSTAT
WIRE ENTRY
7
⁄
8
″
DIA
ACCESSORY
7
⁄
8
″
DIA
ACCESSORY
DIMPLES TO DRILL HOLES
FOR HANGER BOLTS (4 PLACES)
IN HORIZONTAL POSITION
ADDITIONAL
7
⁄
8
″
DIA K.O. ARE
LOCATED IN THE TOP PLATE
AND BOTTOM PLATE
NOTE:
7
⁄
8
″
DIA HOLE
POWER ENTRY
1
1
⁄
2
″
DIA
R.H. GAS ENTRY
7
⁄
8
″
DIA
ACCESSORY
1
3
⁄
4
″
DIA HOLE
GAS ENTRY
VENT CONNECTION
2
