York D3EG 036, D2EG 060, D2EG 048 User Manual



SUNLINE PLUS™

GAS / ELECTRIC

SINGLE PACKAGE AIR CONDITIONERS

INSTALLATION INSTRUCTION

MODELS D2EG 048 & 060 and D3EG 036

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%

Supersedes: 035-14832-002-A-0302

(11 SEER)

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

•

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

•

530.18-N1.8V -Coil Guard

•

530.18-N2.11V -Low NOx Accessory

•

530.18-N8.2V -High Altitude Accy. (Natural Gas)

•

530.18-N8.3V -High Altitude Accy. (Propane)

•

530.18-N8.4V -Gas Piping Accessory

•

530.18-N8.12V -Propane Conversion Accessory

•

690.15-N25V -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. Forinstallationdirectlyoncombustibleflooringor,in theU.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.

035-14832-003-A-0204

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.

Installer should pay particular attention to the words: NOTE, CAUTION and WARNING. Notes are intended to clarify or make the installation easier. Cautions jury and/or equipment damage may result if installation procedure is not handled properly.

are given to prevent equipment damage. Warnings are given to alert installer that personal in

CAUTION

THIS PRODUCT MUST BE INSTALLED IN STRICT COMPLIANCE WITH THE ENCLOSED INSTALLATION INSTRUC TIONS 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.

TABLE OF CONTENTS

General Inspection Reference Approvals Nomenclature

Limitations Location Rigging and Handling Clearances Ductwork Filters Condensate Drain Service Access Thermostat Power and Control Wiring Blower Speed Selection Compressors Combustion Discharge Disconnect Switch Bracket For Optional Belt-Drive Gas Piping Gas Connection L.P. Units, Tanks and Piping Low NOx Application Vent and Combustion Air Hoods Optional Economizer Rain Hood

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

Operating Instructions Post-Start Check List (Gas) Manifold Gas Pressure Adjustment Pilot Checkout Burner Instructions Burner Air Shutter Adjustment Supply Air Blower and Temperature Rise Adj. Supply Air Blower and Temperature Rise Adj. Checking Gas Input Secure Owner's Approval

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INSTALLATION

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OPERATION

START-UP

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15&16

14 14 14 15 15 15 15

16 16

1 1 1 1 2

MAINTENANCE & TROUBLESHOOTING

Normal Maintenance Cleaning Flue Passages and Heating Elements Troubleshooting

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TABLES

3 3 3 3 3 4 4 4 4 4 4 4 4 5 5 6 6 6 7 7

No. Description Page

1 Unit Application Data 2 Gas Heat Application Data 3 Pipe Sizing 4 Physical Data

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5 Supply Air Perf. Direct-Drive Units 6 Supply Air Perf.3 & 4Ton Belt-Drive Units 7 Supply Air Perf.5 Ton Belt-Drive Units 8 Static Resistances 9 Motor & Drive Data

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10 Electrical Data (Direct-Drive Units) 11 Electrical Data (Belt-Drive Units) 12 Limit Control Setting 13 Belt-Drive Supply Air Motor Pulley Adj. 14 Gas Rate - Cubic Feet Per Hour

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 11 Typical Gas Valve 12 Proper Flame Adjustment 13 Typical Flame Appearance 14 Belt Adjustment 15 Press. Drop versus Supply Air CFM

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035-14832-003-A-0204

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18 & 19

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17 17

3 4 5 8 8 9

10 11 11 11 11 14

13 14 15 15 15 16

PRODUCT NOMENCLATURE

D 2 E G 4N

PRODUCT CATEGORY

D = Single Package Air Conditioner

(Air Cooled)

PRODUCT GENERATION

2 = 2nd Generation

3 = 3rd Generation

PRODUCT IDENTIFIER

EG = High Efficiency Gas/Electric

2 Unitary Products Group

NOMINAL COOLING

CAPACITY

036 = 3 Ton 048 = 4 Ton 060 = 5 Ton

0 030 6 2 5

FACTORY INSTALLED HEAT

N = Natural Gas

VOLTAGE CODE

06 = 208/230-1-60 25 = 208/230-3-60 46 = 460-3-60 58 = 575-3-60

NOMINAL GAS HEATING

OUTPUT CAPACITY

040 = 40 MBH 060 = 60 MBH 079 = 79 MBH 099 = 99 MBH

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 UnitApplication Dataand toTable 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'sand /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

Min. / Max.

Supply Air CFM, Nom. 1200 1600 2000 Wet Bulb Temperature (°F) of

Air on Evaporator Coil,

Min. / Max.

Dry Bulb Temperature (°F) of Air on Condenser Coil,

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

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

Min

/ Max.

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 contami

nated combustion air may result equipment dam age or personal injury. Typical contaminates include: permanent wave solutions, chlorinated waxes and cleaners, chlorine based swimming pool chemicals, water softeningchemicals, carbon tetrachloride, Halogen type refrigerants, cleaning solvents (e.g. perchloroethylene), printing inks, paint removers, varnishes, hydrochloric acid, ce ments 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.

208/230V 187 / 253

460V 414 / 506

575V 518 / 630

57 / 72 57 / 72 57 / 72

45 / 120 45 / 120 45 / 120

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 thatcome 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 out-

side 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

APPROXIMATE CENTER OF GRAVITY

30-1/2

“

15-1/8

BACK

FIG. 1 - CENTER OF GRAVITY

67-3/4

CONDENSER COIL END

FRONT



“

DIM. 3-5 TON

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, combus tion 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

sized tomatch thedimensions ofthe ductconnections onthe 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 ductworkmust beinsulated andwaterproofed.

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 pro

vide 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 si multaneous operation of the compressor and the economizer. If you want to energize the compressor for supplemental cooling during the economizer op eration, use athermostat 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 wir

ing 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 #116to the “LOW” speed tap, theblue 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

Capacity,

(Mbh)

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

1Based on 1075 Btu/Ft

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

Output

Capacity,

(Mbh)

Kit Model No. 1NP0434. All furnaces meet the latest California seasonal efficiency requirements.

Available

Models

Gas Rate

(Ft.3/Hr.)

Temp. Rise °F

At Full Input

Min. Max.

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)

C O O L I N G / H E A T I N G ( 2 4 V O L T T H E R M O S T A T )

T H E R M O S T A T

T E R M I N A L S

A D D

J U M P E R

R H

R C

2 4 V O L T T H E R M O S T A T 2 T H 0 7 7 0 1 0 2 4 . I F T H E U N I T H A S A N E C O N O M I Z E R , R E M O V E J U M P E R J 1 F R O M T E R M I N A L S 8 A N D 1 0 O N T H E R E L A Y B O A R D T O P R E V E N T S I M U L T A N E O U S O P E R A T I O N O F T H E C O M P R E S S O R A N D T H E E C O N O M I Z E R . I F Y O U W S E C O N D S T A G E O F C O O L I N G O R H A V E A N D E L E C T R I C H E A T A C C E S S O R Y W I T H T W

O S T A G E S O F H E A T , U S E T H E R M O S T A T 2 T H 0 4 7 1 0 2 4

C O O L I N G / H E A T I N G ( E L E C T R O N I C T H E R M O S T A T )

T H E R M O S T A T

T E R M I N A L S

A D D

E L E C T R O N I C P R O G R A M M A B L E T H E R M O S T A T 2 E T 0 7 7 0 1 0 2 4 ( I N C L U D E S S U B B A S E ) .

I F T H I S U N I T H A S A N D E C O N O M I Z E R , R 1 0 O N T H E R E L A Y B O A R D T O P R E V E N T S I M U L T A N E O U S O P E R A T I O N O F T H E

O M P R E S S O R A N D T H E E C O N O M I Z E R . I F Y O U W A N T T O C O N T R O L T H E

C E C O N O M I Z E R O N A S E C O N D S T A G E O F C O O L I N G , U S

R H

R C

U N I T T E R M I N A L

S T R I P T B 1

Y 1

Y 2

W 1

W 2

A N T T O C O N T R O L T H E R E C O N O M I Z E R O N A

2 4 V O L T

T R A N S F O R M E R

S I N G L E S T A G E

U N I T T E R M I N A L

S T R I P T B 1

Y 1

W 1

2 4 V O L T

T R A N S F O R M E R

E M O V E J U M P E R J 1 F R O M T E R M I N A L S 8 A N D

E T H E R M O S T A T 2 E T 0 4 7 0 0 2 2 4 .

CONTROL WIRING

POWER WIRING

COOLING / HEATING (ELECTRONIC THERMOSTAT)

L E D 1

L E D 2

C O M

U N I T T E R M I N A L

R C

R H

Y 1

Y 2

W 1

W 2

N O T U S E D

A 1

A 2

S T R I P T B 1

Y 1

Y 2

W 1

W 2

T O R E M O T E S E N S O R 2 T H 0 4 0 7 0 2 2 2 4 I F U S E D

N A L S A 1 A N D A 2 P R O V I D E A R E L A Y

2 4 V O L T

T R A N S F O R M E R

T H E R M O S T A T

T E R M I N A L S

A D D

J U M P E R

A D D

J U M P E R

E L E C T R O N I C P R O G R A M M A B L E T H E R M O S T A T 2 E T 0 4 7 0 0 2 2 4 ( I N C L U D E S S U B B A S E )

S E C O N D S T A G E C O O L I N G I S N O T R E Q U I R E D O N U N I T S L E S S E C O N O M I Z E R .

S E C O N D S T A G E H E A T I N G I S O N L Y R E Q U I R E D O N U N I T S W I T H A T W O S T A G E

E L E C T R I C H E A T E R .

R E M O V E J U M B E R J 2 F R O M T E R M I N A L S 4 A N D 9 O N J U M P E R P L U G C O N N E C T O R P 6 O N U N I T S W I T H E C O N M I Z E R . T E R M I O U T - P U T T O C L O S E T H E O U T D O O R E C O N O M I Z E R D A M P E R S W H E N T H E T H E R M O S T A T S W I T C H E S T O T H E S E T - B A C K P O S I T I O N .

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 WITH OPTIONAL BELT-DRIVE BRACKET

A special bracket for mounting a field-supplied disconnect switch is provided in each unit ordered with an optional beltdrive supply air blower. The bracket is shipped inside the blower compartment taped to the top of the blower housing. Install the bracket on the left hand side of the unit as shown in 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 REMOVED. Mounting holes in the bracket have elongated keyways allowing easy installation. Re-tighten screws after bracket is in place to ensure panels will remain leak tight.

GAS PIPING

Proper sizing of gas piping depends on the cubic feet per hour of gas flow required, specific gravity ofthe gas and the lengthof run. “National Fuel Gas Code” Z223.1 should be followed in all cases unless superseded by local codes or gas company requirements. Refer to Table 3.

Unitary Products Group 5

The heating value of the gas may differ with locality. The value should be checked with the local gas utility.

NOTE: There may be a local gasutility requirement specifying

a minimum diameter for gas piping. All units require a 1/2 inch pipe connection at the entrance fitting.

TABLE 3 - PIPE SIZING

Length in Feet

10 20 30 40 50 60 70 80 90

100

Maximum capacity of pipe in cubic feet of gas per hour. (Based upon a pressure drop of 0.3 inch water column and 0.6 specific gravity gas).

1/2 in.

132

92 73 63 56 50 46 43 40 38

Nominal Iron Pipe Size

3/4 in.

278 190 152 130 115 105

96 90 84 79

1 in. 1-1/4 in.

520 350 285 245 215 195 180 170 160 150

1,050

730 590 500 440 400 370 350 320 305

035-14832-003-A-0204

FIG. 4 - EXTERNAL SUPPLY CONNECTION

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.

Twogrommets 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 preventwater 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 com pounds. 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. Allpiping should becleaned of dirtand 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).

FIG. 5 - BOTTOM SUPPLY CONNECTION

EXTERNAL SHUT-OFF

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 theunit 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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