York D3EG 036, D2EG 060, D2EG 048 User Manual

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York D3EG 036, D2EG 060, D2EG 048 User Manual

J

SUNLINE PLUS

 

 

 

 

GAS / ELECTRIC

 

 

SINGLE PACKAGE AIR CONDITIONERS

INSTALLATION INSTRUCTION Supersedes: 035-14832-002-A-0302

035-14832-003-A-0204

MODELS D2EG 048 & 060 and D3EG 036

(11 SEER)

GENERAL

YORK Model DEG units are single package air conditioners with gas heat designed for outdoor installation on a rooftop or a slab.

The units are completely assembled on rigid, permanently attached base rails. All piping, refrigerant charge, and electrical wiring is factory-installed and tested. The units require only electric power, gas piping and duct connections at the point of installation.

The gas-fired heaters have aluminized steel tubular heat exchangers and spark ignition with intermittent pilot.

This appliance is not to be used for temporary heating of buildings or structures under construction.

INSPECTION

As soon as a unit is received, it should be inspected for possible damage during transit. If damage is evident, the extent of the damage should be noted on the carrier's freight bill. A separate request for inspection by the carrier's agent should be made in writing. Refer to Form 50.15-NM for additional information.

REFERENCE

Additional information on the design, installation, operation and service of this equipment is available in the following reference forms:

55.70-N1 -General Installation

55.70-N2 -Pre-start & Post-start Check List

530.18-N1.2V -Economizer Accessory

530.18-N1.13V -Man. Outdoor Air Damper Accy 0-35%

FOR YOUR SAFETY

Do not store or use gasoline or other flammable vapors or liquids in the vicinity of this or any other appliance.

If you smell gas:

1.Open windows

2.Don't touch electrical switches.

3.Extinguish any open flame.

4.Immediately call your gas supplier.

530.18-N1.14V -Man. Outdoor Air Damper Accy 0-100%

530.18-N1.12V -Motorized Outdoor Air Damper Accy.

530.18-N1.8V

530.18-N2.11V

530.18-N8.2V

530.18-N8.3V

530.18-N8.4V

530.18-N8.12V

690.15-N25V -Coil Guard-Low NOx Accessory-High Altitude Accy. (Natural Gas)-High Altitude Accy. (Propane)-Gas Piping Accessory-Propane Conversion Accessory-Low Ambient Accessory

Renewal Parts:

Refer to Parts Manual for complete listing of replacement parts on this equipment.

All forms referenced in this instruction may be ordered from:

Standard Register

Toll Free Tel.: 877-318-9675

Fax: 877-379-7920

APPROVALS

Design certified by CGA and UL listed as follows:

1.For use as a forced air furnace with cooling unit.

2.For outdoor installation only.

3.For installation directly on combustible flooring or, in the U.S.A., on wood flooring or Class A, B, or C roof covering material.

4.For use with natural gas and/or propane (LP) gas.

Not suitable for use with conventional venting systems.

Installer should pay particular attention to the words: 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 and/or equipment damage may result if installation procedure is not handled properly.

CAUTION

THIS PRODUCT MUST BE INSTALLED IN STRICT COMPLIANCE WITH THE ENCLOSED INSTALLATION INSTRUCTIONS AND ANY APPLICABLE LOCAL, STATE, AND NATIONAL CODES INCLUDING, BUT NOT LIMITED TO, BUILDING, ELECTRICAL, AND MECHANICAL CODES

WARNING

INCORRECT INSTALLATION MAY CREATE A CONDITION WHERE THE OPERATION OF THE PRODUCT COULD CAUSE PERSONAL INJURY, PROPERTY DAMAGE AND/OR DEATH.

WARNING

DE-ENERGIZE THE ELECTRICAL POWER AND TURN OFF THE GAS SUPPLY TO THE UNIT BEFORE ATTEMPTING TO INSPECT, REPAIR OR PERFORM MAINTENANCE TO THE UNIT.

035-14832-003-A-0204

TABLE OF CONTENTS

General................................................................................

1

Inspection ............................................................................

1

Reference............................................................................

1

Approvals ............................................................................

1

Nomenclature ......................................................................

2

INSTALLATION

 

Limitations ...........................................................................

3

Location...............................................................................

3

Rigging and Handling ..........................................................

3

Clearances ..........................................................................

3

Ductwork .............................................................................

3

Filters...................................................................................

4

Condensate Drain ...............................................................

4

Service Access....................................................................

4

Thermostat ..........................................................................

4

Power and Control Wiring ...................................................

4

Blower Speed Selection ......................................................

4

Compressors .......................................................................

4

Combustion Discharge ........................................................

4

Disconnect Switch Bracket For Optional Belt-Drive ............

5

Gas Piping...........................................................................

5

Gas Connection...................................................................

6

L.P. Units, Tanks and Piping ................................................

6

Low NOx Application ...........................................................

6

Vent and Combustion Air Hoods .........................................

7

Optional Economizer Rain Hood .........................................

7

OPERATION

 

Cooling System .................................................................

13

Preliminary Operation Cooling ..........................................

13

Cooling Sequence of Operation ........................................

13

Safety Controls (Cooling) ..................................................

13

Heating Sequence of Operation ........................................

13

Safety Controls (Heating) .................................................

14

Heat Anticipator Setpoints.................................................

14

Pre-Start Check List ..........................................................

14

START-UP

 

Operating Instructions .......................................................

14

Post-Start Check List (Gas)...............................................

14

Manifold Gas Pressure Adjustment...................................

14

Pilot Checkout ...................................................................

15

Burner Instructions ............................................................

15

Burner Air Shutter Adjustment...........................................

15

Supply Air Blower and Temperature Rise Adj....................

15

Supply Air Blower and Temperature Rise Adj. ............

15&16

Checking Gas Input...........................................................

16

Secure Owner's Approval..................................................

16

MAINTENANCE & TROUBLESHOOTING

Normal Maintenance .........................................................

 

17

Cleaning Flue Passages and Heating Elements ...............

 

17

Troubleshooting ........................................................

18 & 19

 

TABLES

 

 

No.

Description

 

Page

1

Unit Application Data..................................

 

3

2

Gas Heat Application Data.........................

 

4

3

Pipe Sizing .................................................

 

5

4

Physical Data .............................................

 

8

5

Supply Air Perf. Direct-Drive Units ............

 

8

6

Supply Air Perf.3 & 4Ton Belt-Drive Units ..

9

7

Supply Air Perf.5 Ton Belt-Drive Units .......

 

10

8

Static Resistances......................................

 

11

9

Motor & Drive Data.....................................

 

11

10

Electrical Data (Direct-Drive Units) ............

 

11

11

Electrical Data (Belt-Drive Units)................

 

11

12

Limit Control Setting...................................

 

14

13

Belt-Drive Supply Air Motor Pulley Adj.......

 

15

14

Gas Rate - Cubic Feet Per Hour ................

 

16

 

FIGURES

 

 

No.

Description

 

Page

1

Center of Gravity ........................................

 

3

2

Recommended Drain Piping ......................

 

4

3

Typical Field Wiring....................................

 

5

4

External Supply Connection.......................

 

6

5

Bottom Supply Connection.........................

 

6

6

Vent and Combustion Air Hoods................

 

7

7

Economizer Rain Hood Assembly..............

 

7

8

Enthalpy Setpoint Adjustment ....................

 

8

9

Dimensions and Clearances ......................

 

12

10

Gas Valve Piping........................................

 

13

11

Typical Gas Valve.......................................

 

14

12

Proper Flame Adjustment ..........................

 

15

13

Typical Flame Appearance.........................

 

15

14

Belt Adjustment ..........................................

 

15

15

Press. Drop versus Supply Air CFM ..........

 

16

PRODUCT NOMENCLATURE

 

 

 

 

 

 

D

 

2

 

 

E

G

 

 

0

3

6

 

 

N

 

 

0

4

0

 

2

5

 

 

 

 

 

PRODUCT CATEGORY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VOLTAGE CODE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D = Single Package Air Conditioner

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

06 = 208/230-1-60

 

(Air Cooled)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

25 = 208/230-3-60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

46 = 460-3-60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PRODUCT GENERATION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

58 = 575-3-60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2 = 2nd Generation

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOMINAL GAS HEATING

 

 

3 = 3rd Generation

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OUTPUT CAPACITY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PRODUCT IDENTIFIER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FACTORY INSTALLED HEAT

 

 

040 = 40 MBH

 

 

 

 

 

 

 

 

 

 

 

 

 

NOMINAL COOLING

 

 

 

 

 

 

060 = 60 MBH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EG = High Efficiency Gas/Electric

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

079 = 79 MBH

 

 

 

 

 

 

 

 

 

 

CAPACITY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

099 = 99 MBH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

N = Natural Gas

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

036 = 3 Ton

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

048 = 4 Ton

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

060 = 5 Ton

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Unitary Products Group

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

035-14832-003-A-0204

INSTALLATION

LIMITATIONS

These units must be installed in accordance with the current edition of the following national and local safety codes:

In the U.S.A.:

1.National Electrical Code ANSI/NFPA No. 70.

2.National Fuel Gas Code Z223.1.

3.Gas-Fired Central Furnace Standard ANSI Z21.47-1993.

4.Local gas utility requirements.

In Canada:

1.Canadian Electrical Code CSA C22.1

2.Current Gas Installation Codes CAN/CGA-2.3-M93.

3.Local plumbing and waste water codes.

4.Other applicable local codes.

Refer to Table 1 for Unit Application Data and to Table 2 for Gas Heat Application Data.

If components are to be added to a unit to meet local codes, they 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 calculation made according to the methods of Air Conditioning Contractors of America (ACCA).

LOCATION

TABLE 1 - UNIT APPLICATION DATA

Model DEG

 

036

048

060

Voltage Variation

208/230V

 

187

/ 253

 

 

460V

 

414

/ 506

 

Min. / Max.1

 

 

 

 

575V

 

518

/ 630

 

 

 

 

 

Supply Air CFM, Nom.

 

1200

1600

2000

Wet Bulb Temperature (°F) of

57 / 72

57

/ 72

57 / 72

Air on Evaporator Coil,

 

Min. / Max.

 

 

 

 

 

 

Dry Bulb Temperature (°F) of

45 / 120

45 / 120

45 / 120

Air on Condenser Coil,

 

Min2 / Max.

 

 

 

 

 

 

1Utilization range “A” in accordance with ARI Standard 110.

2A low ambient accessory is available for operation down to 0°F.

Use the following guidelines to select a suitable location for these units.

1.Unit is designed for outdoor installation only.

2.Condenser coils must have an unlimited supply of air. Where a choice of location is possible, position the unit on either north or east side of building.

WARNING:Excessive exposure of this furnace to contaminated combustion air may result equipment damage or personal injury. Typical contaminates include: permanent wave solutions, chlorinated waxes and cleaners, chlorine based swimming pool chemicals, water softening chemicals, carbon tetrachloride, Halogen type refrigerants, cleaning solvents (e.g. perchloroethylene), printing inks, paint removers, varnishes, hydrochloric acid, cements and glues, antistatic fabric softeners for clothes dryers, masonry acid washing materials.

3.For ground level installation, a level pad or slab should be used. The thickness and size of the pad or slab used should meet local codes and unit weight. Do not tie the slab to the building foundation.

4.Roof structures must be able to support the weight of the unit and its options and / or accessories. Unit must be installed on a solid level roof curb or appropriate angle iron frame.

CAUTION: If a unit is to be installed on a roof curb or special frame other than a YORK roof curb, gasketing must be applied to all surfaces that come in contact with the unit underside.

5.Maintain level tolerance to 1/2" maximum across the entire length or width of the unit.

6.Elevate the unit sufficiently to prevent any blockage of the air entrances by snow in areas where there will be snow accumulation. Check the local weather bureau for the expected snow accumulation in your area.

RIGGING AND HANDLING

Exercise care when moving the unit. Do not remove any packaging until the unit is near the place of installation. Rig the unit by attaching chain or cable slings to the lifting holes provided in the base rails. Spreaders, whose length exceeds the largest dimension across the unit, MUST be used across the top of the unit.

BEFORE LIFTING A UNIT, MAKE SURE THAT ITS WEIGHT IS DISTRIBUTED EQUALLY ON THE CABLES SO THAT IT WILL LIFT EVENLY.

Units may also be moved or lifted with a forklift. Slotted openings in the base rails are provided for this purpose.

LENGTH OF FORKS MUST BE A MINIMUM OF 42".

Remove the nesting brackets from the four corners on top of the unit. All screws that are removed when taking these brackets off must be replaced on the unit.

CAUTION: An adhesive backed label is provided over the outside of the combustion air inlet opening to prevent moisture from entering the unit which could cause damage to electrical components. Allow this closure label to remain in place until the combustion air hood is to be installed (refer to Figure 6).

Refer to Table 4 for unit weights and to Figure 1 for approximate center of gravity.

CLEARANCES

BACK

CONDENSER

APPROXIMATE

COIL END

 

 

 

CENTER OF

 

 

 

GRAVITY

 

 

 

 

 

FRONT

 

30B

67-3/4

 

 

30-1/2

 

 

15A-1/8

 

 

 

 

 

DIM.

3-5 TON

FIG. 1 - CENTER OF GRAVITY

A

19-3/4"

B

40-3/4"

All units require certain clearances for proper operation and service. Installer must make provisions for adequate combustion and ventilation air in accordance with Section 5.3, Air for Combustion and Ventilation of the National Fuel Gas Code, ANSI Z223.1 (in U.S.A.) or Sections 7.2, 7.3 or 7.4 of Gas Installation Codes CAN/CGA-B149.1 and .2 (in Canada) and/or applicable provisions of the local building codes. Refer to Figure 9 for the clearances required for combustible construction, servicing, and proper unit operation.

WARNING:Do not permit overhanging structures or shrubs to obstruct condenser air discharge outlet, combustion air inlet or vent outlet.

DUCTWORK

Ductwork should be designed and sized according to the methods in Manual Q of the Air Conditioning Contractors of America (ACCA).

A closed return duct system shall be used. This shall not preclude use of economizers or outdoor fresh air intake. The supply and return air duct connections at the unit should be made with flexible joints to minimize the transmission of noise.

Unitary Products Group

3

The supply and return air duct systems should be designed for the CFM and static requirements of the job. They should NOT be sized to match the dimensions of the duct connections on the unit.

CAUTION: When fastening ductwork to the side duct flanges on the unit, insert the screws through the duct flanges only. DO NOT insert the screws through the casing.

Outdoor ductwork must be insulated and waterproofed.

Refer to Figure 9 for information concerning side and bottom supply and return air duct openings.

FILTERS

1" filters are supplied with each unit. 2" replacement filters may be used with no modification to the filter racks. Filters must always be installed ahead of the evaporator coil and must be kept clean or replaced with same size and type. Dirty filters will reduce the capacity of the unit and will result in frosted coils or safety shutdown. Minimum filter area and required sizes are shown in Table 4.

CONDENSATE DRAIN

Plumbing must conform to local codes. Use a sealing compound on male pipe threads. Install a condensate drain line from the 3/4" PVC female connection on the unit to spill into an open drain.

NOTE: The condensate drain line MUST be trapped to provide proper drainage. See Figure 2.

FIG. 2 - RECOMMENDED DRAIN PIPING

SERVICE ACCESS

Access to all serviceable components is provided by the following removable panels:

Compressor compartment

Burner compartment

Blower compartment

Main control box

Filter compartment

Motor access (on units with belt-drive option)

Refer to Figure 9 for location of these access panels.

CAUTION: Make sure that all screws are replaced on the unit to maintain an air-tight seal.

THERMOSTAT

The room thermostat should be located on an inside wall approximately 56" above the floor where it will not be subject to drafts, sun exposure, or heat from electrical fixtures or appliances. Follow manufacturer's instructions enclosed with thermostat for general installation procedure. Color coded insulated wires (#18 AWG) should be used to connect thermostat to unit. See Figure 3 for wiring details.

NOTE: If the unit has an economizer, remove jumper J1 from terminals 8 and 10 on the relay board to prevent simultaneous operation of the compressor and the economizer. If you want to energize the compressor for supplemental cooling during the economizer operation, use a thermostat with two stages of cooling.

POWER AND CONTROL WIRING

Field wiring to the unit must conform to provisions of the National Electrical Code (NEC) ANSI/NFPA No. 70 and/or local

035-14832-003-A-0204

ordinances. The unit must be electrically grounded in accordance with the NEC (as specified above) and/or local codes.

Voltage tolerances which must be maintained at the compressor terminals during start-up and running conditions are indicated on the unit Rating Plate and Table 1.

The internal wiring harness furnished with this unit is an integral part of a UL design certified unit. Field alteration to comply with electrical codes should not be required.

A disconnect switch should be field provided for the unit. The switch must be separate from all other circuits. Refer to Figure 9 for installation location. If any of the wire supplied with the unit must be replaced, replacement wire must be of the type shown on the wiring diagram.

Electrical lines must be sized properly to carry the load. USE COPPER CONDUCTORS ONLY. Each unit must be wired with a separate branch circuit fed directly from the meter panel and properly protected.

CAUTION: When connecting electrical power and control wiring to the unit, waterproof type connectors MUST BE USED so that water or moisture cannot be drawn into the unit during normal operation. The above waterproofing conditions will also apply when installing a field-supplied disconnect switch.

Refer to Figure 3 for typical field wiring and to the appropriate unit wiring diagram for control circuit and power wiring information.

BLOWER SPEED SELECTION

Three blower motor speeds are available on the direct-drive units. The speed selection for the direct-drive units is determined by the CFM and ESP requirements of the applications. All units with belt-drive option have an adjustable motor pulley to achieve the above conditions.

All direct-drive units with 208/230 voltage are shipped with the wire labeled #116 connected to the “HIGH” speed tap on the blower motor. If a lower blower motor speed is desired, this wire should be moved to the “MED” or “LOW” speed tap on the motor for the speed desired.

All direct-drive units with 460 and 575 voltage are shipped with the wire labeled #116 connected to the “HIGH” speed tap on the blower motor. If the medium speed is required, connect wire #116 to the “MED” speed tap and the blue motor lead to the “HIGH” speed tap. If the low speed is required, connect wire #116 to the “LOW” speed tap, the blue motor lead to the “HIGH” speed tap and the orange motor lead to the “MED” speed tap.

COMPRESSORS

On some units the compressor is mounted on springs which have been tightened down for shipment only.

After this unit is installed, back out the compressor bolts until the sleeve clears the top grommet.

CAUTION: Do Not loosen compressor mounting bolts.

TABLE 2 - GAS HEAT APPLICATION DATA

Input

Output

Available

Gas Rate

1

Temp. Rise °F

Capacity,

Capacity,

on

 

At Full Input

2

(Ft.3/Hr.)

 

 

(Mbh)

(Mbh)

Models

 

 

Min.

Max.

50

40

3 Ton

47

 

15

45

75

60

4 Ton

70

 

25

55

100

79

3/5 Ton

93

 

40/25

70/55

125

99

4/5 Ton

116

 

45/35

75/65

NOTE: Gas Heaters are shipped available for natural gas, but can be converted to L.P. with Kit Model No. 1NP0434. All furnaces meet the latest California seasonal efficiency requirements.

1Based on 1075 Btu/Ft3.

2The air flow must be adjusted to obtain a temperature rise within the range shown.

COMBUSTION DISCHARGE

The products of combustion are discharged horizontally through a screened opening on the gas heat access panel.

4

Unitary Products Group

035-14832-003-A-0204

COOLING / HEATING (24 VOLT THERMOSTAT)

COOLING/HEATING(24VOLTTHERMOSTAT)

THERMOSTAT1

TERMINALS

 

 

UNITTERMINAL

 

RH

STRIPTB1

ADD

 

 

 

JUMPER

RC

R

YY1 24VOLT

TRANSFORMER

Y2

WW1

W2

GG

B

124VOLTTHERMOSTAT2TH07701024.IFTHEUNITHASANECONOMIZER, REMOVEJUMPERJ1FROMTERMINALS8AND10ONTHERELAYBOARD TOPREVENTSIMULTANEOUSOPERATIONOFTHECOMPRESSORAND THEECONOMIZER.IFYOUWANTTOCONTROLTHERECONOMIZERONA SECONDSTAGEOFCOOLINGORHAVEANDELECTRICHEATACCESSORY WITHTWOSTAGESOFHEAT,USETHERMOSTAT2TH0471024

COOLING/HEATING(ELECTRONICTHERMOSTAT)

SINGLESTAGE

 

THERMOSTAT1

 

 

TERMINALS

UNITTERMINAL

 

RH

STRIPTB1

 

RC

R

ADD

Y

Y1

JUMPER

W

W1

 

 

G

G

 

 

B

 

 

24VOLT

 

 

TRANSFORMER

1ELECTRONICPROGRAMMABLETHERMOSTAT2ET07701024(INCLUDESSUBBASE). IFTHISUNITHASANDECONOMIZER,REMOVEJUMPERJ1FROMTERMINALS8AND 10ONTHERELAYBOARDTOPREVENTSIMULTANEOUSOPERATIONOFTHE COMPRESSORANDTHEECONOMIZER.IFYOUWANTTOCONTROLTHE ECONOMIZERONASECONDSTAGEOFCOOLING,USETHERMOSTAT2ET04700224.

REFER TO THE ELECTRICAL

DATA TO SIZE THE DISCONNECT

SWITCH, THE WIRING AND THE

OVERCURRENT PROTECTION

CONTROL WIRING

COOLING / HEATING (ELECTRONIC THERMOSTAT)

THERMOSTAT1

 

 

 

TERMINALS

 

UNITTERMINAL

 

 

RC

 

 

STRIPTB1

24VOLT

ADD

 

 

 

RH

 

 

R

TRANSFORMER

JUMPER

 

 

 

 

 

 

 

 

Y1

 

 

Y1

 

 

Y2

2

2

Y2

 

 

W1

 

 

W1

 

4

W2

 

3

W2

 

 

G

 

 

G

 

 

B

 

 

B

 

 

LED1

 

 

X

 

 

LED2

NOT

 

N

 

 

COM

USED 4

 

 

ADD

A1

 

 

 

 

 

3

 

 

 

JUMPER

A2

 

 

 

 

T

 

TOREMOTESENSOR

 

T

 

2TH040702224IFUSED

1ELECTRONICPROGRAMMABLETHERMOSTAT2ET04700224(INCLUDESSUBBASE)

2SECONDSTAGECOOLINGISNOTREQUIREDONUNITSLESSECONOMIZER.

3SECONDSTAGEHEATINGISONLYREQUIREDONUNITSWITHATWOSTAGE ELECTRICHEATER.

4REMOVEJUMBERJ2FROMTERMINALS4AND9ONJUMPERPLUGCONNECTOR P6ONUNITSWITHECONMIZER.TERMINALSA1ANDA2PROVIDEARELAY OUT-PUTTOCLOSETHEOUTDOORECONOMIZERDAMPERSWHENTHE THERMOSTATSWITCHESTOTHESET-BACKPOSITION.

POWER WIRING

REFER TO THE ELECTRICAL

DATA TO SIZE THE DISCONNECT

SWITCH, THE WIRING AND THE

OVERCURRENT PROTECTION

FIG. 3 - TYPICAL FIELD WIRING

DISCONNECT SWITCH BRACKET FOR UNITS

The heating value of the gas may differ with locality. The value

WITH OPTIONAL BELT-DRIVE BRACKET

should be checked with the local gas utility.

 

A special bracket for mounting a field-supplied disconnect

NOTE: There may be a local gas utility requirement specifying

switch is provided in each unit ordered with an optional belt-

 

a minimum diameter for gas piping. All units require a

drive supply air blower. The bracket is shipped inside the

 

1/2 inch pipe connection at the entrance fitting.

blower compartment taped to the top of the blower housing.

 

 

 

 

 

 

 

Install the bracket on the left hand side of the unit as shown in

TABLE 3 - PIPE SIZING

 

 

 

Figure 9. Several existing screws at the top of the unit and one

 

 

 

 

 

 

 

 

 

 

approximately midway down from the top will be used for

 

 

 

 

 

 

 

mounting the bracket. Screws should be loosened only - NOT

Length in Feet

 

 

Nominal Iron Pipe Size

 

REMOVED. Mounting holes in the bracket have elongated

1/2 in.

 

3/4 in.

1 in.

1-1/4 in.

 

 

 

keyways allowing easy installation. Re-tighten screws after

10

 

132

 

278

520

1,050

bracket is in place to ensure panels will remain leak tight.

20

 

92

 

190

350

730

30

 

73

 

152

285

590

GAS PIPING

40

 

63

 

130

245

500

50

 

56

 

115

215

440

Proper sizing of gas piping depends on the cubic feet per hour

60

 

50

 

105

195

400

70

 

46

 

96

180

370

of gas flow required, specific gravity of the gas and the length of

80

 

43

 

90

170

350

run. “National Fuel Gas Code” Z223.1 should be followed in all

90

 

40

 

84

160

320

100

 

38

 

79

150

305

cases unless superseded by local codes or gas company

 

 

Maximum capacity of pipe in cubic feet of gas per hour. (Based upon a pressure drop of 0.3 inch

requirements. Refer to Table 3.

water column and 0.6 specific gravity gas).

 

 

 

 

 

 

 

Unitary Products Group

5

035-14832-003-A-0204

FIG. 4 - EXTERNAL SUPPLY CONNECTION

FIG. 5 - BOTTOM SUPPLY CONNECTION

EXTERNAL SHUT-OFF

EXTERNAL SHUT-OFF

 

 

GAS CONNECTION

The gas supply line can be routed through the knockouts located on the front of the unit or through the opening provided in the unit's base. Refer to Figure 9 to locate these access openings. Typical supply piping arrangements are shown in Figures 4 and 5. All shaded items are field-supplied.

Two grommets are shipped in the blower compartment (in parts bag taped to the blower housing) of every unit with gas heat and should be used in the knockouts when the gas piping penetrates the front of the unit.

After the gas supply piping has been installed, the bottom opening should be sealed to prevent water from leaking into the building.

Gas piping recommendations:

1.A drip leg and a ground joint union must be installed in the gas piping.

2.When required by local codes, a manual shut-off valve may have to be installed outside of the unit.

3.Use wrought iron or steel pipe for all gas lines. Pipe compound should be applied sparingly to male threads only.

WARNING:Natural gas may contain some propane. Propane, being an excellent solvent, will quickly dissolve white lead or most standard commercial compounds. Therefore, a special pipe compound must be applied when wrought iron or steel pipe is used. Shellac base compounds such as Gaskolac or Stalastic, and compounds such as Rectorseal #5, Cyde's or John Crane may be used.

4.All piping should be cleaned of dirt and scale by hammering on the outside of the pipe and blowing out the loose dirt and scale. Before initial start-up, be sure that all of the gas lines external to the unit have been purged of air.

5.The gas supply should be a separate line and installed in accordance with all safety codes as prescribed under “Limitations”. After the gas connections have been completed, open the main shut-off valve admitting normal gas pressure to the mains. Check all joints for leaks with soap solution or other material suitable for the purpose. NEVER USE A FLAME.

6.The furnace and its individual manual 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 (3.48kPa).

The furnace must be isolated from the gas supply piping system by closing its individual manual shut-off valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psig (3.48kPa).

7.A 1/8 inch NPT plugged tapping, accessible for test gage connection, must be installed immediately upstream of the gas supply connection to the furnace.

L.P./PROPANE UNITS, TANKS AND PIPING

All gas heat units are shipped from the factory equipped for natural gas use only. The unit may be converted in the field for use with L.P./propane gas with accessory kit model number 1NP0434.

All L.P./propane gas equipment must conform to the safety standards of the National Fire Protection Association.

For satisfactory operation, L.P./propane gas pressure must be 10.5 inch W.C at the unit under full load. Maintaining proper gas pressure depends on three main factors:

1.The vaporization rate which depends on (a) the temperature of the liquid and (b) the “wetted surface” area of the container or containers.

2.The proper pressure regulation. (Two-stage regulation is recommended from the standpoint of both cost and efficiency.)

3.The pressure drop in the lines between regulators and between the second stage regualtor and the appliance. Pipe size required will depend on the length of the pipe run and the total load of all appliances.

Complete information regarding tank sizing for vaporization, recommended regulator settings, and pipe sizing is available from most regulator manufacturers and L.P./propane gas suppliers.

L.P./propane gas is an excellent solvent and special pipe compound must be used when assembling piping for this gas as it will quickly dissolve white lead or most standard commercial compounds. Shellac base compunds such as Rectorseal #5 are satisfactory for this type of gas.

Check all connections for leaks when piping is completed, using a soap solution. NEVER USE A FLAME.

LOW NOx APPLICATION

For natural gas heat installations in locations which require low Nitros Oxide emmissions, accessory model 1LN0404 must be installed.

6

Unitary Products Group

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