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66433-YIM-B-1004

Unitary Products Group

17

Adjust as follows:

1.

Remove the cap from the valve body. See Figure 10 for 
location.

2.

To decrease the gas pressure, turn the adjusting screw 
counterclockwise.

3.

To increase the gas pressure, turn the adjusting screw 
clockwise.

NOTE:

The correct manifold pressure for natural gas fur-
naces is 3.5 IWG. The correct manifold pressure for
propane (LP) is 10.0 IWG.

BURNER INSTRUCTIONS

To check or change the burners, CLOSE THE MAIN MAN-
UAL SHUT-OFF VALVE AND SHUT OFF ALL POWER TO
THE UNIT.

1.

Remove the two (2) #8 screws holding each burner in 
place.

2.

Remove the burner assembly from the manifold assem-
bly by moving the burner assembly forward, turn at an 
angle and pull back.

3.

Burners are now accessible for service.

HOT SURFACE PILOT INSTRUCTIONS

To adjust the pilot flame:

1.

Remove the pilot adjustment cover screw.

2.

Adjust the pilot adjustment screw to achieve the proper 
pilot flame.

3.

The pilot flame should envelope 3/8” of the end of the 
flame sensor and not contain any yellow color, see Fig-
ure 11.

4.

Replace the pilot adjustment cover screw after the pilot 
flame is set.

To check, adjust or remove the hot surface pilot assembly,
CLOSE THE MAIN MANUAL SHUT-OFF VALVE AND SHUT
OFF ALL POWER TO THE UNIT.

1.

Disconnect the wiring from the gas valve to the hot sur-
face pilot assembly.

2.

Remove the two (2) #8 screws holding the hot surface 
pilot assembly in place.

3.

Remove the hot surface pilot assembly.

To remove the hot surface ignitor and flame sensor assem-
bly:

1.

Remove the clip attaching the ignitor and sensor assem-
bly as shown in Figure 12.

FIGURE 9 - GAS VALVE - FRONT

FIGURE 10 - GAS VALVE - REAR

MANUAL GAS

SWITCH

(SHOWN IN "OFF

POSITION)

CONTROL

ELECTRICAL

CONNECTION

IGNITOR ELECTRICAL

CONNECTION

MANIFOLD

PRESSURE

TAP

GROUND

TERMINAL

1/2-14 NPT

(OUTLET)

PILOT GAS

CONNECTION

PILOT

ADJUSTMENT

V E N T   P R E S S U R E   L I M I T E R

1 / 2   -   1 4   N P T

( I N L E T )

L I N E   P R E S S U R E   T A P

M A N I F O L D   P R E S S U R E

A D J U S T M E N T

( R E M O V E   C A P )

FIGURE 11 - PROPER FLAME ADJUSTMENT

3 / 8

Summary of Contents for AFFINITY DNZ024

Page 1: ...ords NOTE CAUTION and WARNING Notes are intended to clarify or make the installation easier Cautions are given to prevent equipment damage Warnings are given to alert installer that personal injury an...

Page 2: ...NPUT 18 NATURAL GAS 18 TROUBLESHOOTING 19 TYPICAL WIRING DIAGRAM NOTES SEE FIGURES 13 14 AND 15 23 LIST OF FIGURES Fig Pg 1 UNIT CENTER OF GRAVITY 5 2 FIELD WIRING DIAGRAM CONTROL WIRING 7 3 POWER WIR...

Page 3: ...e given to prevent equipment damage WARNINGS are given to alert the installer that personal injury and or equipment damage may result if installation procedure is not handled properly INSPECTION As so...

Page 4: ...hey are to be installed at the dealer s and or the customer s expense Size of unit for proposed installation should be based on heat loss heat gain calculations made in accordance with industry recogn...

Page 5: ...f sufficient length should be used across the top of the unit Units may also be moved or lifted with a fork lift Slotted openings in the skid are provided for this purpose Forks must pass completely t...

Page 6: ...sing your units efficiency and increasing operating costs and wear and tear on the unit and controls Filters should be checked monthly this is especially impor tant since this unit is used for both he...

Page 7: ...t be sized properly to carry the load Each unit must be wired with a separate branch circuit fed directly from the meter panel and properly fused Refer to Figure 3 for typical field wiring and to the...

Page 8: ...are factory adjusted and ready for operation PHASING Three phase scroll compressors operate in only one direc tion If the scroll is drawing low amperage has similar suction and discharge pressures or...

Page 9: ...own Continuous return air temperature should not be below 55 F TABLE 4 PROPANE1 LP GAS APPLICATION DATA AVAILABLE ON MODELS INPUT CAPACITY MBH 2 OUTPUT CAPACITY MBH GAS RATE 3 FT 3 HR NUMBER OF BURNER...

Page 10: ...l shut off valve may have to be installed outside of the unit 3 Use wrought iron or steel pipe for all gas lines Pipe dope should be applied sparingly to male threads only FIGURE 4 EXTERNAL SUPPLY CON...

Page 11: ...tened to the outside of the side gas control electri cal compartment with the screws provided in the bag attached to the inside of the gas control electrical compart ment see Figure 6 If flexible stai...

Page 12: ...TA MODEL DNZ POWER SUPPLY VOLTAGE LIMITATIONS1 COMPRESSOR COND FAN MOTOR FLA SUPPLY AIR BLOWER MOTOR FLA MINIMUM CIRCUIT AMPACITY MAX FUSE SIZE AMPS2 MAX HACR BREAKER SIZE AMPS UNIT POWER FACTOR TRANS...

Page 13: ...L All dimensions are in inches They are subject to change with out notice Certified dimensions will be provided upon request TABLE 9 UNIT DIMENSIONS FRONT UNIT SIZE DIMENSION A B 024 030 036 33 1 2 18...

Page 14: ...8 DIA KNOCKOUT 1 2 NPTI CONNECTION LOW VOLTAGE CONN DIA KNOCKOUT 8 7 FIGURE 8 UNIT DIMENSIONS BACK BOTTOM 1 3 4 1 5 2 9 9 1 6 1 5 3 1 2 1 3 4 1 3 4 1 5 4 1 4 1 2 3 1 2 3 3 8 1 4 1 2 2 8 3 8 1 4 1 2 C...

Page 15: ...utomatically The limit switch operates when a high temperature condition caused by inadequate supply air flow occurs thus shut ting down the ignition control and closing the main gas valve and energiz...

Page 16: ...rmostat to the desired setting 12 If the unit will not operate follow the instructions To Turn Off Gas To Appliance and call your service technician or gas supplier TO TURN OFF GAS TO UNIT 1 Set the t...

Page 17: ...lame 3 The pilot flame should envelope 3 8 of the end of the flame sensor and not contain any yellow color see Fig ure 11 4 Replace the pilot adjustment cover screw after the pilot flame is set To che...

Page 18: ...gas consumed per hour from Table 11 If the actual input is not within 5 of the furnace rating with allowance being made for the permissible range of the regu lator setting replace the orifice spuds wi...

Page 19: ...ECKOUT procedures Troubleshooting of components necessitates opening the electrical control box with the power connected to the unit Use extreme care when working with the live circuits Check the unit...

Page 20: ...66433 YIM B 1004 20 Unitary Products Group FIGURE 13 TYPICAL WIRING DIAGRAM DNZ 208 230 1 60...

Page 21: ...66433 YIM B 1004 Unitary Products Group 21 FIGURE 14 TYPICAL WIRING DIAGRAM DNZ 208 230 3 60...

Page 22: ...66433 YIM B 1004 22 Unitary Products Group FIGURE 15 TYPICAL WIRING DIAGRAM DNZ 460 3 60...

Page 23: ...Refrigerant operates at 50 70 percent higher pressures than R 22 Be sure that servicing equipment and replacement components are designed to operate with R 410A R 410A Refrigerant cylinders are rose c...

Page 24: ...e without notice Printed in U S A 66433 YIM B 1004 Copyright 2004 by Unitary Products Group All rights reserved Supersedes 66433 YIM A 0903 035 19532 000 A 0903 Unitary 5005 Norman Products York OK Gr...

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