background image

IX.

VENTING

Refer to the enclosed Installation Instructions, (Vent Tables For 1-
and 2-Stage Category I Fan-Assisted Furnaces) for quick, easy
reference, and national or local installation code such as National
Fuel Gas Code NFPA 54-1999/ANSI Z223.1-1999 in the United
States, or the National Standard of Canada Natural and Propane
Installation Codes CAN/CGA-B149.1- and .2-M95 in Canada, for
proper vent sizing and installation requirements.

After fully assembling the vent connector to the furnace flue
collar, securely fasten the vent connector to the collar with 2
field-supplied, corrosion-resistant, sheet metal screws located
180 degrees apart and midway up the collar.

The horizontal portion of the venting system shall maintain a
minimum of 1/4-in. upward slope per linear ft, and it shall be
rigidly supported every 5 ft or less with hangers or straps to
ensure that there will be no movement after installation.

X.

START-UP, ADJUSTMENT, AND SAFETY CHECK

A.

General

The furnace must have a 115-v power supply properly connected
and grounded. Correct polarity must be maintained to enable gas
heating operation.

The gas service pressure must not exceed 0.5 psig (14-in. wc), and
no less than 0.16 psig (4.5-in. wc).

Thermostat wire connections at R and W/W1 are the minimum
required for gas heating operation. W2 must be connected for
2-stage heating thermostats. C

OM

, Y/Y2, and G are required for

cooling, heat pumps, and some clock thermostats. These must be
made at the 24-v terminal block on the control. (See Fig. 11.)

This furnace can be installed with either a single-stage heating or
a 2-stage heating thermostat.

For single-stage thermostats, connect thermostat W to W/W1 at
furnace control terminal block. (See Fig. 9.) For single-stage
thermostats, the control will determine, based on length of previ-
ous heating on and off cycles, when to operate in low- and
high-gas heat for optimum comfort. Setup switch-2 (SW-2) must
be in the factory-shipped OFF position. See Fig. 12 and Tables 6
and 7 for setup switch information.

If a 2-stage heating thermostat is to be used, move SW-2 to ON
position at end of furnace installation. This overrides built-in
control process for selecting high and low fire and allows the

Fig. 10—Heating and Cooling Application Wiring Diagram 2-Stage Thermostat and Condensing Unit

A99072

115-V FUSED

DISCONNECT

SWITCH

(WHEN REQUIRED)   

JUNCTION
BOX   

CONTROL

BOX

24-V

TERMINAL

BLOCK  

THREE-WIRE

HEATING-

ONLY   

SEVEN

WIRE

2-STAGE THERMOSTAT TERMINALS
   

FIELD-SUPPLIED

FUSED DISCONNECT   

2-SPEED
CONDENSING
UNIT   

FURNACE

G

R

W2

Y2

G

Y1

C

GND   

GND

GND

GND

GND

GND   

FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WIRING
FACTORY 115-V WIRING   

208/230- OR
460-V
THREE
PHASE   

208/230-V
SINGLE
PHASE   

Y2

Y1

C

WHT   

BLK   

WHT   

BLK   

W1

R

W2

COM

W/W1

Y/Y2

NOTES: 

  

1.  Connect Y-terminal as shown for proper operation.

                2.  Some thermostats require a "C" terminal connection as shown.

3.  If any of the original wire, as supplied, must be replaced,
     use same type or equivalent wire.

TABLE 6—SETUP SWITCH DESCRIPTION

SETUP

SWITCH NO.

NORMAL

POSITION

DESCRIPTION

OF USE

SW-1

Only High-Gas Heat

OFF (Staged Gas

Heat)

Turn switch on to obtain only high-gas-heat operation on any call
for heat regardless of whether R-W/W1, or R-W/W1, -W2 is
closed. SW-1 overrides SW-2.

SW-2

Low-Gas Heat (Adaptive Mode)

OFF (Single-Stage Thermostat)

Turn switch off for installations with single-stage thermostats; con-
trol selects low-gas-heat or high-gas-heat operation based on pre-
vious cycles. Turn switch on for installations with 2-stage thermo-
stats to permit only low-gas-heat operation in response to closing
R-W/W1. High-gas heat is supplied only when R to W/W1 and W2
are closed.

SW-3 and SW4

ON, OFF

Switches control gas heating mode blower off delay. (See Table
7.)

TABLE 7—BLOWER OFF DELAY SETUP

SWITCH (SW) POSITION

DESIRED HEATING

MODE BLOWER OFF

DELAY (SEC)

SETUP SWITCH

SW-3

SW-4

90

OFF

OFF

135

OFF

ON

180

ON

OFF

225

ON

ON

—10—

Summary of Contents for 330AAV

Page 1: ...labels attached to or shipped with the unit and other safety precautions that may apply Follow all safety codes In the United States refer to the National Fuel Gas Code NFGC NFPA No 54 1999 ANSI Z223...

Page 2: ...6 12 11 16 4 134 042080 17 1 2 15 7 8 16 4 150 048080 21 19 3 8 19 1 2 4 154 036100 17 1 2 15 7 8 16 4 160 048100 21 19 3 8 19 1 2 4 166 060100 24 1 2 22 7 8 23 4 184 048120 21 19 3 8 19 1 2 5 178 060...

Page 3: ...require these instructions as a minimum for a safe installation CAUTION Application of this furnace should be in doors with special attention given to vent sizing and material gas input rate air tempe...

Page 4: ...on and ventilation air must be provided in accordance with Section 5 3 Air for Combustion and Ventilation of the NFGC or applicable provisions of the local building codes Canadian installations must b...

Page 5: ...with the outdoors shall be provided See item 2 below c If furnace is installed on a raised platform to provide a return air plenum and return air is taken directly from hallway or space adjacent to fu...

Page 6: ...sories All accesso ries MUST be connected external to furnace main casing IV RETURN AIR CONNECTIONS CAUTION For airflow requirements above 1800 CFM see Air Delivery table in Product Data literature fo...

Page 7: ...le in each bottom corner of furnace as shown in Fig 7 2 Install nut on bolt and install bolt and nut in hole Install flat washer if desired 3 Install another nut on other side of furnace base Install...

Page 8: ...een gas control manifold and manual shutoff valve WARNING Use the proper length of pipes and ad equate piping support to avoid stress on the gas control manifold A failure to follow this warning can c...

Page 9: ...24 v humidifier connection The terminals are energized with 24v 0 5 amp maximum when the gas valve is energized Fig 9 Heating and Cooling Application Wiring Diagram 1 Stage Thermostat and Condensing U...

Page 10: ...and high gas heat for optimum comfort Setup switch 2 SW 2 must be in the factory shipped OFF position See Fig 12 and Tables 6 and 7 for setup switch information If a 2 stage heating thermostat is to b...

Page 11: ...ec tion is based on stored history of thermostat cycle times When wall thermostat calls for heat R W W1 circuit closes The furnace control performs a self check verifies the low heat and high heat pre...

Page 12: ...high gas heat and vice versa a Switching from low to high gas heat If thermostat R W W1 circuit for low gas heat is closed and R W2 circuit for high gas heat closes the control CPU switches the induc...

Page 13: ...et thermal overload switches 4 Blower motor speed selections are for average conditions See Installation Instructions for details on optimumspeed selection 5 Replace only with a 3 AMP fuse 6 Auxiliary...

Page 14: ...r motor BLWM speed by sensing only G for low cool speed and Y2 for high cool speed 2 The EAC terminals EAC 1 and EAC 2 are ener gized with 115v when the blower motor BLWM is operating on either coolin...

Page 15: ...al gas supplier b Obtain yearly specific gravity average from local gas supplier c Verify furnace model Table 9 can only be used for model 330AAV Furnaces d Find installation altitude in Table 9 NOTE...

Page 16: ...t connections See Fig 12 This keeps furnace locked in high heat operation Repeat items h through k for high heat operation EXAMPLE High heat operation at 0 2000 ft altitude Furnace input from rating p...

Page 17: ...3 6 1 5 44 3 8 1 6 43 3 4 1 4 43 3 5 1 5 43 3 6 1 5 2001 825 44 3 4 1 4 44 3 5 1 5 44 3 7 1 5 44 3 8 1 6 43 3 4 1 4 to 850 44 3 2 1 4 44 3 3 1 4 44 3 4 1 5 44 3 6 1 5 44 3 7 1 5 3000 875 45 3 7 1 6 4...

Page 18: ...4 750 45 3 4 1 4 45 3 5 1 5 45 3 6 1 5 45 3 7 1 6 45 3 8 1 6 775 45 3 2 1 3 45 3 3 1 4 45 3 4 1 4 45 3 5 1 5 45 3 6 1 5 5001 800 47 3 5 1 5 47 3 6 1 5 45 3 2 1 3 45 3 3 1 4 45 3 4 1 4 825 48 3 8 1 6...

Page 19: ...Pressure High Low U S A Only 600 45 3 4 1 4 45 3 5 1 5 45 3 6 1 5 45 3 7 1 6 45 3 8 1 6 625 47 3 7 1 6 45 3 2 1 4 45 3 3 1 4 45 3 4 1 4 45 3 5 1 5 8001 650 47 3 4 1 4 47 3 5 1 5 47 3 6 1 5 45 3 2 1 3...

Page 20: ...TE CU FT HR SECONDS FOR 1 REVOLUTION SIZE OF TEST DIAL SECONDS FOR 1 REVOLUTION SIZE OF TEST DIAL 1 cu ft 2 cu ft 5 cu ft 1 cu ft 2 cu ft 5 cu ft 10 11 12 13 14 360 327 300 277 257 720 655 600 555 514...

Page 21: ...normal start up allow furnace to operate for 2 minutes then block flue outlet 100 percent Furnace should cycle off within 2 minutes d Remove blockage and reconnect vent connector to furnace flue coll...

Page 22: ...22...

Page 23: ...23...

Page 24: ...video based formats and materials All include video and or slides plus companion book Classroom Service Training plus hands on the products in our labs can mean increased confidence that really pays d...

Reviews: