18-CD24D1-2
19
Installer’s Guide
ELECTRICAL CONNECTIONS
Make wiring connections to the unit as indicated on en-
closed wiring diagram. As with all gas appliances using
electrical power, this Furnace shall be connected into a
permanently live electric circuit. It is recommended
that Furnace be provided with a separate “circuit pro-
tection device” electric circuit. The Furnace must be
electrically grounded in accordance with local codes or
in the absence of local codes with the National Electri-
cal Code, ANSI/ NFPA 70 or CSA C22.1 Electrical Code,
if an external electrical source is utilized.
The inte-
grated Furnace control is polarity sensitive
.
The
hot leg of the 120V power supply must be connected to
the black power lead as indicated on the wiring dia-
gram. Provision for hooking up a humidifier is provided
on the integrated control.
Refer to the SERVICE FACTS literature and unit wiring
diagram attached to furnace.
GAS PIPING
▲
WARNING
!
DO NOT USE SEMI-RIGID METALLIC GAS CONNEC-
TORS (FLEXIBLE GAS LINES) WITHIN THE FURNACE
CABINET. FAILURE TO FOLLOW THIS WARNING
COULD RESULT IN PROPERTY DAMAGE, PERSONAL
INJURY OR DEATH.
The following warning complies with State of California law, Proposition 65.
Hazardous Gases!
Exposure to fuel substances or by-products of
incomplete fuel combustion is believed by the state of
California to cause cancer, birth defects, or other
reproductive harm.
▲
WARNING
!
▲
CAUTION
!
Use a backup wrench on the Gas Valve when installing
gas piping to prevent damage to the Gas Valve and
Manifold Assembly.
The installation of piping shall be in accordance with
piping codes and the regulations of the local gas com-
pany. Pipe joint compound must be resistant to the
chemical reaction with liquefied petroleum gases.
Refer to piping Table 6, for delivery sizes. Connect gas
supply to the unit, using a ground joint union and a
manual shut-off Valve as shown in Figures 14 and 15.
National codes require a condensation drip leg to be in-
stalled ahead of the controls as shown in Figures 14 and
15.
The Furnace and its individual shut-off valve must be
disconnected from the gas supply piping system during
any pressure testing of that system at test pressures in
excess of 1/2 psig (3.5 kPa).
▲
WARNING
!
EXPLOSION HAZARD!
PROPANE GAS IS HEAVIER THAN AIR AND MAY
COLLECT IN ANY LOW AREAS OR CONFINED
SPACES. IF THE GAS FURNACE IS INSTALLED IN A
BASEMENT, AN EXCAVATED AREA OR A CONFINED
SPACE, IT IS STRONGLY RECOMMENDED TO CON-
TACT A GAS SUPPLIER TO INSTALL A GAS DETECT-
ING WARNING DEVICE IN CASE OF A GAS LEAK
.
NOTE: The manufacturer of your furnace does not
test any detectors and makes no representations re-
garding any brand or type of detector.
▲
WARNING
!
EXPLOSION HAZARD!
ODORANT FADE MAY MAKE THE GAS UNDETECT-
ABLE EXCEPT WITH A WARNING DEVICE. IF THE
GAS FURNACE IS INSTALLED IN A BASEMENT, AN
EXCAVATED AREA OR A CONFINED SPACE, IT IS
STRONGLY RECOMMENDED TO CONTACT A GAS
SUPPLIER TO INSTALL A GAS DETECTING WARN-
ING DEVICE IN CASE OF A GAS LEAK.
NOTE: The manufacturer of your furnace does NOT
test any detectors and makes no representations re-
garding any brand or type of detector.
TABLE 6
NATURAL GAS ONLY
TABLE OF CUBIC FEET PER HOUR OF GAS
FOR VARIOUS PIPE SIZES AND LENGTHS
PIPE
SIZE
LENGTH OF PIPE
10
20
30
40
50
60
70
1/2
132
92
73
63
56
50
46
3/4
278
190
152
130
115
105
96
1
520
350
285
245
215
195
180
1-1/4
1050
730
590
520
440
400
370
This table is based on pressure drop of 0.3 inch W.C. and 0.6 SP.GR. gas
TABLE 7
ORIFICE SIZES
INPUT
RATING
BTUH
NUMBER
OF
BURNERS
MAIN BURNER ORIFICE
DRILL SIZE
NAT. GAS
LP GAS
60,000
80,000
100,000
120,000
3
4
5
6
45
45
45
45
56
56
56
56
