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035-17438-001 Rev. A (901)

12

Unitary Products Group

NOTE:  

The furnace’s control system depends on correct

polarity of the power supply and a proper ground connection.
Refer to the furnace control diagnostics section for symptoms
of reversed power supply polarity.

Connect the power supply as shown on the unit wiring label
on the inside of the blower compartment door and refer to
Figure 8. The black furnace lead must be connected to the L1
(hot) wire from the power supply. 

The white furnace lead must be connected to neutral. Also,
the green equipment ground wire must be connected to the
power supply ground.

Remove the screw retaining the junction box cover. Route the
power wiring through the unit side panel with a conduit con-
nector or other proper connection. Make wiring connections:
Refer to Figure 8. Replace the wiring box cover and screw.

An alternate wiring method is to use a field provided 2 x 4 box
and cover on the outside of the furnace. Route the furnace
leads into the box using a protective bushing where the wires
pass through the furnace panel.

NOTE:  

The power connection leads and wiring box on

upflow units may be relocated to the left side of the furnace.
Remove the screws and cut wire tie holding excess wiring.
Reposition on the left side of the furnace and fasten using
holes provided.

ELECTRICAL CONTROL CONNECTIONS

Install the field supplied thermostat. The thermostat instruc-
tions for wiring are packed with the thermostat. With the ther-
mostat set in the OFF position and the main electrical source
disconnected, complete the low voltage wiring from the ther-
mostat to the terminal board on the CFM programmable
board. Connect Class 2 control wiring: see Figure 9, for sin-
gle stage thermostat wiring: see Figure 10 for two stage ther-
mostat wiring. . 

Apply strain relief to thermostat wires passing through the
cabinet.

NOTE:  

Some electronic thermostats do not have adjustable

heat anticipators. They may have other type cycle rate adjust-
ments. Follow the thermostat manufacturer's instructions.

The 24volt, 40 VA transformer is sized for the furnace compo-
nents only, and should not be connected to auxiliary devices
such as humidifiers, air cleaners, etc. The transformer may
provide power for an air conditioning unit contactor.

 

Use copper conductors only.

 FIGURE 8 : 

Upflow Models - Electrical Wiring

BLK/BLK
WHT/WHT
GRN/GRN

HUM

EAC

WIRING INSIDE
JUNCTION BOX

BURNER
COMPARTMENT

CFM/TIMER
BOARD

BLOWER

COMPARTMENT

IGNITION MODULE

CLASS 2 SYSTEM
CONTROL WIRING
TO THERMOSTAT

DOOR SWITCH

JUNCTION BOX

EAC (HOT)

HUM (HOT)

GND.

N

L1
(HOT)

WHT

GRN

BLK

Set the heat anticipator in the room thermostat as 

shown below. Setting it lower will cause short cycles. 

Setting it higher will cause the room temperature to 

exceed the setpoint.

Two-Stage Thermostat

First Stage

.4 Amps

Second Stage

.1 Amps

Single Stage Thermostat

.4 Amps

 FIGURE 9 : 

Field Wiring for Single Stage Thermostat

TYPICAL FIELD WIRING - SINGLE STAGE

SINGLE STAGE
THERMOSTAT

HUM

Y2

Y1

Y

R

W1

W2

G

C

O

X/L

Y1

R

W1

G
C

LOW HEAT TIME
ADJUSTMENT

CFM/TIMER BOARD

MINUTE SELECT

10
15
20

TIME OFF

HUM

Y2

Y1

Y

R

W1

W2

O

C

O

X/L

HUM

HEAT PUMP

HUMDISTAT

COOL

HEAT

DELAY

ADJ

P9

P6

W1

W2

10
15
20

MINUTE SELECT

Содержание PxDUA12V06401 series

Страница 1: ...035 17438 001 Rev A 901 EFFICIENCY RATING CERTIFIED CAUTION READ ALL SAFETY GUIDES BEFORE YOU START TO INSTALL YOUR FURNACE SAVE THIS MANUAL TABLE OF CONTENTS GENERAL INFORMATION 2 UNIT INSTALLATION 3...

Страница 2: ...PRODUCT COULD CAUSE PERSONAL INJURY OR PROPERTY DAMAGE IMPROPER INSTALLATION ADJUSTMENT ALTERATION SERVICE OR MAINTENANCE CAN CAUSE INJURY OR PROPERTY DAMAGE REFER TO THIS MANUAL FOR ASSISTANCE OR AD...

Страница 3: ...ptable heat loss calculation for the structure ACCA Manual J or other approved methods may be used The furnace should be located using these guidelines 1 Where a minimum amount of vent piping and elbo...

Страница 4: ...the total input rating of all equipment located in the enclosure b Not less than the sum of the areas of all vent con nectors in the confined space 3 Louvers Grilles and Screens a In calculating free...

Страница 5: ...nds in a general vertical direction and does not con tain offsets exceeding 45 degrees except that a vent system having not more than one 60 degree offset is permitted NOTE This appliance may be commo...

Страница 6: ...nce being operated in operation Adjust thermostat so appli ance will operate continuously 5 Test for draft hood equipped appliance spillage at the draft hood relief opening after 5 minutes of main bur...

Страница 7: ...V UH INPUT MBH H L OUTPUT MBH H L NOM CFM CABINET WIDTH IN AFUE1 LOW FIRE TEMP RISE F HIGH FIRE TEMP RISE MAX OUTLE AIR TEMP F BLOWER TOTAL UNIT AMPS MAX OVER CURRENT PROPECT2 MIN WIRE SIZE AWG 75 FT...

Страница 8: ...removable access panel is recommended in the outlet duct such that smoke or reflected light would be observable inside the casing to indi cate the presence of leaks in the heat exchanger This access...

Страница 9: ...and notes on blower perfor mance tables in this manual Where the return duct system is not complete the return con nection must run full size to a location outside the utility room or basement For fur...

Страница 10: ...s is recommended Refer to Fig ure 6 on page 10 NOTE See crawl space installation for suspending the fur nace in attic installations CRAWL SPACE INSTALLATION The furnace can be hung from floor hoists o...

Страница 11: ...cordance with instructions Specific electrical data is given on the furnace rating plate Provide a power supply separate from all other circuits Install overcurrent protection and disconnect switch pe...

Страница 12: ...OFF position and the main electrical source disconnected complete the low voltage wiring from the ther mostat to the terminal board on the CFM programmable board Connect Class 2 control wiring see Fig...

Страница 13: ...nt 1 Blockage of internal flue gas passage ways 2 Blockage of vent piping 3 Failure of combustion air blower motor Limit Control The high temperature limit control is located on the furnace vestibule...

Страница 14: ...increment find the cubic feet of gas consumed per hour from Table 4 on page 15 NOTE To find the Btuh input multiply the number of cubic feet of gas consumed per hour by the BTU content of the gas in y...

Страница 15: ...cement The temperature rise or temperature difference between the return air and the heated air from the furnace must be within the range shown on the furnace rating plate Application limi tations are...

Страница 16: ...uction for the recommended airflow and Table 6 on page 17 The DELAY Tap should be set in the B position for a two stage condenser This results in a 45 second off delay at 82 of the programmed cooling...

Страница 17: ...002UHC11 L8V1002UHC11 P DUC20V09601 G8V12020UHC11 L8V12020UHC11 COOL TAP ADJ TAP High Low High Low High Low High Low 1340 740 1675 920 2050 1135 2020 1130 A B 1155 635 1555 850 1860 980 1855 960 B B 1...

Страница 18: ...is fixed at 60 seconds for SEER enhance ment HEATING OPERATIONAL SEQUENCE Two Stage Thermostat The ignition control in this furnace is unique to this product The control allows for a 24 volt or a 115...

Страница 19: ...gas valve When power is restored the gas valve will remain deener gized and a restart of the ignition sequence will begin imme diately A momentary loss of gas supply flame blowout or a shorted or open...

Страница 20: ...LOW INDUCER LOW STAGE PRESSURE SWITCH HSI 1ST STAGE MAIN VALVE FLAME SENSE LOW CIRCULATOR HEAT SPEED 1ST STAGE LOW PRESSURE SWITCH CLOSE RECOGNITION HSI WARM UP 17 SEC IGNITION ACTIVATION PERIOD 4 SE...

Страница 21: ...bly for cleaning is as follows 1 Disconnect the power supplied to the furnace 2 Remove the vest and blower panels 3 Disconnect the motor control harness and the power har ness from the motor 4 Remove...

Страница 22: ...including the flue baffle plate rear may be vacuumed or cleaned with hot water if necessary 6 The upper portion of the heat exchanger is now accessi ble With a long flexible wire brush clean inside ea...

Страница 23: ...R REMOVAL FOR CONTROLLER REPLACEMENT Refer to BLOWER CARE on page 21 of this manual for blower removal instructions Rest the blower on its side so the end of the motor is accessible and facing up Wait...

Страница 24: ...ehind a clear view port in the blower compartment door DO NOT remove the furnace blower compartment panel OR turn off furnace power as either action will clear the control s memory of the fault The co...

Страница 25: ...y low gas pressure faulty gas valve faulty hot surface ignitor reversed line polarity or burner problem 8 FLASH This fault is indicated if the flame is lost 5 times during the heating cycle This could...

Страница 26: ...NTROL BOARD P3 S3 2 PIN PLUG SOCKET AT HOT SURFACE IGNITOR P4 S4 3 PIN PLUG SOCKET AT INDUCER MOTOR P5 S5 3 PIN PLUG SOCKET ON VALVE P6 S6 6 PIN PLUG SOCKET ON CFM TIMER BOARD P7 S7 16 PIN PLUG SOCKET...

Страница 27: ...035 17438 001 Rev A 901 Unitary Products Group 27 SERVICE RECORDS...

Страница 28: ...hange without notice Printed in U S A 035 17438 001 Rev A 901 Copyright by York International Corp 2001 All rights reserved Supersedes 035 17438 001 Rev A 801 Unitary 5005 Norman Product York OK Group...

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