Energy Tech Laboratories DHG180, DHG240 User Manual
INSTALLATION
INSTRUCTION
CONTENTS
GENERAL.................................3
SAFETYCONSIDERATIONS..................3
AGENCYAPPROVALS ......................4
INSPECTION...............................4
INSTALLATION ............................4
OPERATION..............................19
MAINTENANCE ...........................25
COMPLETE TABLE OF CONTENTS ONFOLLOWING PAGE
SUNLINE GAS/ELECTRIC
SINGLE PACKAGE
AIR CONDITIONERS
SAVE THIS MANUAL
MODELS: DHG180 (15 TON, 10.0 EER)
DHG240 (20 TON, 9.7 EER)
208/230/460 VOLT
MODELS ONLY
208/230/575 VOLT
MODELS ONLY
035-17233-000-C-0702
TABLE OF CONTENTS
035-17233-000-C-0702
GENERAL ......................................3
SAFETYCONSIDERATIONS .......................3
REFERENCE ........................................4
RENEWALPARTS .........................................4
AGENCY APPROVALS . . . . . . . . . . . . . . . . . . . . . . .. . . . . 4
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INSTALLATION..................................4
LIMITATIONS........................................4
LOCATION ..........................................5
RIGGING AND HANDLING .............................5
CLEARANCES .......................................5
DUCTWORK .........................................6
FIXEDOUTDOORAIRINTAKEDAMPER..................6
CONDENSATEDRAIN.................................7
COMPRESSORS .....................................7
FILTERS ............................................7
SERVICEACCESS ...................................7
THERMOSTAT.......................................7
POWERANDCONTROLWIRING........................7
COMBUSTIONDISCHARGE............................8
GASPIPING.........................................8
GASCONNECTION ...................................8
L.P.UNITS,TANKSANDPIPING .......................10
VENTANDCOMBUSTIONAIRHOODS..................11
OPTECONO/MOTORIZEDDAMPERRAINHOOD .........11
ENTHALPYSETPOINTADJUSTMENT ........................11
PWREXH/BARORELIEFDMPR&RAINHOODOPT .......11
OPERATION ...................................19
COOLINGSYSTEM ..................................19
PRELIMINARYOPERATIONCOOLING ..................19
COOLINGSEQUENCEOFOPERATION .................19
NOOUTDOORAIROPTIONS ...............................19
ECONOMIZER WITH SINGLE ENTHALPY SENSOR . . .. . . . .. . .. . 19
ECONOMIZERWITHDUALENTHALPYSENSORS ..............19
ECONOMIZERWITHPOWEREXHAUST ......................19
MOTORIZEDOUTDOORAIRDAMPERS ......................19
CONTINUOUSBLOWER ...................................19
SAFETYCONTROLS.................................19
HEATINGSYSTEM ..................................20
CONTINUOUSBLOWER ...................................20
INTERMITTENTBLOWER ..................................20
SAFETYCONTROLS.................................20
HEATANTICIPATORSETPOINTS ......................21
STARTUP.....................................21
PRE-STARTCHECKLIST .............................21
OPERATING INSTRUCTIONS ..........................21
TO LIGHT PILOT AND MAIN BURNERS: . . . . . . . . . . .. . .. . . .. . . . . 21
TOSHUTDOWN ..........................................22
POST-STARTCHECKLIST(GAS) ......................22
MANIFOLDGASPRESSUREADJUSTMENT..............22
PILOTCHECKOUT ..................................22
BURNERINSTRUCTIONS.............................22
BURNERAIRSHUTTERADJUSTMENT..................23
CHECKINGSUPPLYAIRCFM .........................23
ADJUSTMENTOFTEMPERATURERISE ................24
BELTDRIVEBLOWER .....................................24
CHECKINGGASINPUT ..............................24
NATURALGAS ...........................................24
SECURE OWNER’SAPPROVAL ........................24
MAINTENANCE.................................25
NORMALMAINTENANCE .............................25
FILTERS ................................................ 25
MOTORS................................................ 25
OUTDOORCOIL .......................................... 25
BURNER & PILOT . .. . . . . . . . . .. . . . . . . . . . . . . . . .. . .. . . . . . . . . . 25
TO CLEAN BURNERS . . . . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . . . . 25
COMBUSTIONAIRDISCHARGE .............................25
CLEANINGFLUE&HEATINGELEMENTS ................25
TROUBLESHOOTING ...........................26
LIST OF FIGURES
Fig. # Pg. #
1 TYPICALRIGGING............................5
2 CENTEROFGRAVITY.........................5
3 FIXEDOUTDOORAIRDAMPER.................6
4 RECOMMENDEDDRAINPIPING ................7
5 TYPICALFIELDWIRING .......................9
6 EXT SUPPLY CONN EXT SHUT-OFF . . . . . . . . . . . . 10
7 BOTTOMSUPPLYCONNEXTSHUT-OFF........10
8 VENTANDCOMBUSTIONAIRHOODS ..........11
9 ENTHALPYSETPOINTADJUSTMENT ...........12
10 UNITDIMENSIONSFRONTVIEW...............14
11 UNITDIMENSIONSRAINHOOD ................14
12 UNITDIMENSIONSREARVIEW................15
13 208 VOLT & HIGH SPEED DRIVEACCY . . . . . . .. . 16
14 GASVALVEPIPING..........................20
15 GASVALVEANDCONTROLS..................21
16 TYPICALGASVALVE ........................22
17 PROPERFLAMEADJUSTMENT ................22
18 TYPICAL FLAME APPEARANCE . . . . . . . . . . . . . . . . 23
19 BELTADJUSTMENT .........................23
20 PRESSUREDROP ...........................24
21 TYPICALFLUEBAFFLEINSTALLATION .........26
LIST OF TABLES
Tbl. # Pg. #
1 PRODUCT NOMENCLATURE . . . . . . . . . . . . . . . . . . . . 3
2 UNIT APPLICATION DATA . . . . . . . . . . . . . . . . . . . . . . 4
3 CONTROLWIRESIZES.........................8
4 GAS HEAT APPLICATION DATA . . . . . . . .. . . . . . . .. 9
5 PIPESIZING.................................10
6 PHYSICALDATA .............................13
7 DHGVOLTAGELIMITATIONS ..................13
8 MINIMUMCLEARANCES ......................13
9 DHGELECTRICALDATA ......................13
10UTILITIESENTRY ............................15
11DHG 15T SUPPLY AIR BLOWER PERFORMANCE . . 16
12DHG 20T SUPPLY AIR BLOWER PERFORMANCE . . 17
13STATICRESISTANCES........................18
14POWER EXHAUST PERFORMANCE . . . . . . . . . . . . . 18
15BLOWERMOTORANDDRIVEDATA.............18
16LIMITCONTROLSETTING .....................21
17HEATANTICIPATORSETPOINT ................21
18GASRATE-CUBICFEETPERHOUR............24
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035-17233-000-C-0702
TABLE 1: PRODUCT NOMENCLATURE
Model #
D
1
HG
180
E
018
25
EC
Model Number
Description
Product Category
Product Generation
Product Identifier
Nominal Cooling Capacity
Factory Installed Heat
Nominal Heating Capacity
Voltage Code
Factory Installed
Option Code
D 1 HG 180 E 180 25 EC
Options
D =Air Cond., Single Package
1 =1st Generation
HG =Gas/Electric
180 =15 Tons 240 = 20 Tons
A = No Heat
E = Electric Heat
018 =18 kW 054 = 54 kW
036 =36 kW 072 = 72 kW
25 =208/230-3-60
58 =575-3-60
EC = Single Input Economizer DK = Dual Input Economizer
FD = Sing. Input Economizer w/ Power
Exhaust
BG =Motorized Outdoor Air Damper
N=NaturalGas
46 = 460-3-60
CF = Dual Input Economizer with Power
Exhaust
GENERAL
YORK Model DHG units are single package high efficiency
gas-fired central heating furnaces with cooling unit 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
electric power, gas connection, duct connections, installation
of combustion air inlet hood, flue gas outlet hoods and fixed
outdoor air intake damper (units without economizer or
motorized damper option only) at the point of installation.
The gas-fired heaters have aluminized-steel tubular heat
exchangers and spark ignition with provenpilot.
.
FOR YOUR SAFETY IF YOU SMELL GAS:
a. Open windows.
b. Don’t touch electrical switches; do not use any
phones inthe area ofthe gas leak.
SAFETY CONSIDERATIONS
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.
Due to system pressure, moving parts and electrical components, installation and servicing of air conditioning equipment
can be hazardous. Only qualified, trained, service personnel
should install, repair, maintain or service this equipment.
Observe all precautions in the literature, on labels and tags
accompanyingthe equipment whenever working on air conditioning equipment. Be sure to follow all other safety precautions thatapply.
Wear safety glasses and work gloves, and follow all safety
codes. Use a quenching cloth and have a fire extinguisher
available for all brazing operations.
c. Extinguish any open flame.
d. Immediately call your gas supplier from another
location. Follow your gas supplier’s instructions.
e. If you cannot reachyour gas supplier, call the fire
departments.
This product must be installed in strict compliance
with the enclosed installation instructions and any
applicable local, state, and national codes including, butnot limited to, building, electrical and
mechanical codes.
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INSTALLATION
LIMITATIONS
035-17233-000-C-0702
Improper installation may create a condition where
the operation of the product could causepersonal
injury orproperty damage.
REFERENCE
Additional information on the design, installation, operation
and service of this equipment is available in the following reference forms:
• 44-320-10 - Barometric Relief Damper Accessory
• 530.18-N6.1V - Propane Conversion Accessory(USA)
• 530.18-N6.2V - High Altitude Accessory (Nat. Gas)
• 530.18-N6.3V - High Altitude Accessory (Propane)
RENEWAL PARTS:
Refer to the Renewal Parts Manual for complete listing of
replacement parts on this equipment.
All forms referenced in this instruction may be ordered from:
Standard Re gister
2101 West Tecumseh Road
Norman, Oklahoma 73069
Toll Free Phone (877) 318-9675
Toll Free Fax: (877) 379-7920
AGENCY APPROVALS
Design certified by ETL as follows:
These units must be installed in accordance with the following national and local safety codes:
1. National Electrical Code ANSI/NFPA No. 70.
2. NationalFuel Gas Code Z223.1.
3. Gas-Fired Central Furnace StandardANSI Z21.47a.
4. Local gas utility requirements.
Refer to Table 2 for Unit Application Data and to Table 4 for
Gas HeatApplication Data.
TABLE 2: UNIT APPLICATION DATA
MODEL SIZE 15 TON 20 TON
VoltageVariation,
Min./Max
Supply Air CFM, Min./Max. 4500/7200 6000/9400
Wet Bulb Temperature (°F) of a ir
on Outdoor CoilMin./Max.
Dry Bulb Temperature (°F) of air
on Outdoor CoilMin./Max.
1
2
1
Rated in accordance with ARI Standard110, utilization
range “A”.
A lowambient accessory is available for operation
downto0°F.
208/230-3-60 187/253
460-3-60 414/506
575-3-60 518/630
57/72
2
25/120
1. For use as a forced air furnace with cooling unit.
2. For outdoor installationonly.
3. For installation on combustible material.
4. For use with natural gas or propane gas.
After installation, the unit must be adjusted to obtain a temperature rise within the range specified on the unit rating
plate.
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.
INSPECTION
As soon as a unit is received,it shouldbe 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.
4 Unitary Products
Size ofunit for proposed installation should be based on heat
loss/heat gain calculation made according to the methods of
the Air Conditioning Contractorsof America (ACCA).
This furnace is not to be used for temporary heating of buildings orstructures under construction.
035-17233-000-C-0702
LOCATION
Use the following guidelines to select a suitable location for
these units.
1. Unit is designed for outdoor installation only.
2. Condensercoils must have an unlimited supply of air.
Where a choice of location is possible, position the unit
on eithernorth or eastside of building.
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.
Length ofthe forks must be a minimum of 90”.
An adhesive backed label isprovided overthe 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 hoodis to be installed (refer to Figure 7).
3. For ground level installation, use a level concrete slab
with a minimum thickness of 4 inches.The length and
width should be at least 6 inchesgreater than the unit
base rails. Do not tie slabto the building foundation.
4. Roofstructures must beable to support the weightof the
unit andits options and/or accessories.Unit must be
installed on a solid level roof curb or appropriate angle
iron frame.
Ifaunitistobeinstalledonaroofcurborspecial
frame other than a YORK roof curb, gasketing
must be applied to all surfaces that come in contact with the unit underside.
5. Maintain leveltolerance to 1/2" maximum across the
entire length or width of the unit.
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 round 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. Refer to Figure 1.
FIGURE 1: TYPICAL RIGGING
Refer to Table 6 for unit weights and to Figure 2 for approximate center of gravity.
FIGURE 2 : CENTER OF GRAVITY
CLEARANCES
Units may also be moved or lifted with a forklift, from the front
or rear only, providing that an accessory skidis used.
Unitary Products 5
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 Table 8 for the clearances required for
combustible construction, servicing, and proper unit
operation.
Do not permit overhanging structures or shrubs to
obstruct outdoor air discharge outlet, combustion
air inlet or vent outlets.
035-17233-000-C-0702
DUCTWORK
Ductwork should be designed and sized according to the
methods in Manual Q of the Air Conditioning Contractors of
America (ACCA).
A closedreturn 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 noise.
The supply and return air duct s ystems should be designed
for the CFM and static requirements of the job. They should
NOT be sized to match the dimensions of the duct connec-
tions on the unit.
When fastening ductwork to side duct flanges on
unit, insert screws through duct flanges only. DO
NOT insert screwsthrough casing.
Outdoor ductwork must be insulated and waterproofed.
Refer to Figure 10 and12 for information concerning side and
bottom supply and return air duct openings.
FIGURE 3 : FIXED OUTDOOR AIR DAMPER
Gasketing and mounting screws are provided in a parts bag
attached to the hood assembly. Apply gasketing to the three
flange surfaces on the hood prior to installing the hood.
Extend gasketing 1/4" beyond the top and bottom of the two
side flanges to insure adequate sealing.
Adjusting the damper to the desired air flow may be done
before mounting the hood into position or (after installation)
by removing thefront hood panel or thescreen on the bottom
of the hood. Damper baffle in position 1 will allow approximately 10% recirculated air flow, position 2 approximately
15% and, to allow approximately 25%, remove the damper
baffle.
On units with bottom return air applications, install the
damper assembly over the opening in the side return air
access panel. Remove and discard the opening cover and
the covering over the hood mounting holes (used for shipping) before installing. Securewith the screws provided.
On units with side return air applications, install the damper
assembly on the return air ductwork as close to the unit as
possible.Cut anopening 16" high by 18" wide in the ductwork
to accommodate the damper. Using the holes in the hood
flanges as a template, drill 9/64" dia. (#26 drill) holes into the
ductwork and secure with the screws provided.
FIXED OUTDOOR AIR INTAKE DAMPER
This damper is shipped inside the return air compartment. It
is completely assembled and ready for installation. A damper
baffle inside of the hood is adjustable to provide variable
amounts of outdoor air intake on units that are not provided
with an economizer or a motorized damper option. Refer to
Figure 3.
6 Unitary Products
If outdoor air intake will not be required on units
with bottom return air applications, the damper
assembly should still be mounted on the side
return airaccess panel, per theinstructions above,
to insure moisture is not drawn into the unit during
operation. The covering over the mounting holes
only need be removed. Do not remove theopening
cover.
035-17233-000-C-0702
CONDENSATE DRAIN
Plumbing must conform to local codes. Use a sealing compound on male pipe threads. Install a condensate drain line
from the 1" NPT female connection on the unit to an open
drain.
FIGURE 4 : RECOMMENDED DRAIN PIPING
An alternate drain connection (1" NPT female coupling) is
provided inboard on the same centerline as the exterior location.
NOTE:
vide proper drainage.See Figure 4.
The condensate drain line MUST be trapped to pro-
• Side Supply & Return Air compartments (Two panels)
• Blower compartment (Three panels)
• Main control box
• Filter compartment
• Outdoor Air compartment (Two panels)
Refer toFigure 10 forlocation of these access panels.
Make sure that all screws and panel latches are
replaced and properly positioned 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. Seven color
coded insulated wires (#18 AWG) should be used to connect
thermostat to unit.
POWER AND CONTROL WIRING
COMPRESSORS
Units are shipped with compressor mountings factoryadjusted and ready for operation.
Do Not loosen compressor mountingbolts.
FILTERS
Two-inch filters are supplied with each unit. Filters must
always be installed ahead of the evaporator coil and must be
keptcleanorreplacedwithsamesizeandtype.Dirtyfilters
will reduce the capacity of the unit and will result in frosted
coils or safety shutdown. Minimum filter area and required
sizes areshown in Table 6.
SERVICE ACCESS
Access to all serviceable components areprovided bythe following removable panels:
• Compressor compartment
• Gas Heatcompartment (Two panels)
Field wiring to the unit must conform to provisions of the
National Electrical Code, ANSI / NFPA No. 70 (latest edition)
and/or local ordinances. The unit must be electrically
grounded in accordance with N.E.C. and/or local codes. Voltage tolerances which must be maintained at the compressor
terminals during starting and running conditions are indicated
on the unit Rating Plate and Table 2.
The internal wiring harness furnished with this unit is an integral part of a ETL design certifiedunit. Field alterationto comply withelectrical codesshould not be required.
A fused disconnect switch should be field provided for the
unit. Theswitch must be separate from all othercircuits. Wire
entry at knockout openings require conduit fittings to comply
with NEC and/or local codes. Refer to Figure 10 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 and the same minimum gauge as the
replaced wire.
Electrical line must be sized properly to carry the load. Each
unit must be wired with a separate branch circuit fed directly
from themeter panel and properly fused.
Refer toFigure 5 for typical field wiringand to the appropriate
unit wiring diagram for control circuit and power wiring information.
Unitary Products 7
035-17233-000-C-0702
Typical supply piping arrangements are shown in Figures 6
and 7. All shaded items are field-supplied.
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.
COMBUSTION DISCHARGE
The products of combustion are discharged horizontally
through two screened (hooded) openings on the upper gas
heat access panel.
TABLE 3: CONTROL WIRE SIZES
Wire Size
22 20 19 18 16
40 120 150 190 305
Max. Wire Length3Feet
1
Total wire length is from unit to room thermostat, and
back tounit.
2
Solid, ClassII copper wire.
3
Total Wire length is from unitto room thermostat, and
back tounit.
1
2
GAS PIPING
Proper sizing of gas piping depends on the cubic feet per
hour of gas flow required, specific gravity of the gas and the
length of run. National Fuel Gas Code Z223.1 should be followed in all cases unless superseded by local codes or gas
utility requirements. Refer to Table 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 gas utility requirement specify-
ing a minimum diameter for gas piping. All units require a 1
inch pipeconnection at the entrance fitting.
GAS CONNECTION
The gas supply line can be routed through the knockouts
located on the front of the unit or through the opening providedintheunit'sbase.RefertoFigure10tolocatethese
access openings.
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 in the unit 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 gaspiping.
2. When required by localcodes, a manual shut-off valve
may haveto be installed outside of the unit.
3. Usewrought iron orsteel pipe forall gas lines.Pipe dope
should be applied sparingly tomale threads only.
4. All piping shouldbe cleaned of dirt and scale by hammering on the outside of the pipe and blowing out the
loose dirtand scale. Before initial start-up, besure that
all ofthe gas lines external tothe unit have been purged
of air.
5. Thegas supply should be aseparate line andinstalled 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 tothe mains.Check alljoints forleaks with
soap solution orother material suitable for the purpose.
NEVER USE AFLAME.
6. Thefurnace and its individual manual shut-off valve must
be disconnected fromthe gas supply pipingsystem during anypressure testingof that system at test pressures
in excessof 1/2 psig (3.48kPa).
The furnace mustbe isolatedfrom the gas supply piping
system byclosing itsindividual manual shut-off valve
during anypressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psig
(3.48kPa).
7. A1/8 inchNPTplugged tapping, accessiblefor testgage
connection, must be installed immediately upstream of
the gassupply connection to the furnace.
8 Unitary Products
035-17233-000-C-0702
p
C O O L I N G O N L Y ( 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
R
Y 1
Y 2
G
1
2 4 V o l t T h e r m o s t a t 2 T H 0 4 7 0 1 2 2 4 o r 2 T H 0 4 7 0 1 5 2 4
( w i t h S u b b a s e 2 T B 0 4 7 0 0 2 2 4 ) .
T e r m i n a l b l o c k 1 T B - l o c a t e d o n r e l a y b o a r d i n 2 4 - v o l t s e c t i o n
o f t h e u n i t c o n t r o l b o x .
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
L E D 1
L E D 2
C O M
A D D
J U M P E R
1
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 ) .
2
T e r m i n a l b l o c k 1 T B - l o c a t e d o n r e l a y b o a r d i n 2 4 - v o l t s e c t i o n o f t h e u n i t c o n t r o l b o x .
3
S e c o n d s t a g e h e a t i n g i s n o t r e q u i r e d o n u n i t s w i t h a s i n g l e s t a g e e l e c t r i c h e a t e r .
4
T e r m i n a l s A 1 a n d A 2 p r o v i d e a r e l a y 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 .
N O T E : F a n s s w i t c h m u s t b e i n " O N "
C O N T R O L W I R I N G
U N I T T E R M I N A L
1
C O O L I N G O N L Y ( 2 4 V O L T T H E R M O S T A T )
1
B L O C K 1 T B
R C
R H
Y 1
Y 2
W 1
W 2
G
B
N O T U S E D
A 1
A 2
T
T
T O R E M O T E S E N S O R
2 T H 0 4 7 0 2 2 2 4 I F U S E D
o s i t i o n f o r m i n i m u m v e n t i l a t i o n d u r i ng h e a t e r ope r a t i o n .
2
R
Y 1
Y 2
W 1
W 2
G
B
2 4 V O L T
X
T R A N S F O R M E R
A 1
A 2
U N I T T E R M I N A L
B L O C K 1 T B
3
4
4
R
Y 1
Y 2
W 1
W 2
G
B
X
2 4 V O L T
A 1
T R A N S F O R M E R
A 2
A D D
J U M P E R
2
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
1
R H
R C
Y 1
Y 2
W 1
W 2
G
3
U N I T T E R M I N A L
B L O C K 1 T B
2
R
Y 1
Y 2
W 1
W 2
G
B
X
A 1
A 2
2 4 V O L T
T R A N S F O R M E R
Y 3
1
2 4 V o l t T h e r m o s t a t 2 T H 0 4 7 0 1 0 2 4 o r 2 T H 0 4 7 0 1 5 2 4
( w i t h S u b b a s e 2 T B 0 4 7 0 0 3 2 4 ) .
2
T e r m i n a l s t r i p 1 T B - l o c a t e d o n r e l a y b o a r d i n 2 4 - v o l t s e c t i o n
o f t h e u n i t c o n t r o l b o x .
3
S e c o n d s t a g e h e a t i n g i s n o t r e q u i r e d o n u n i t s w i t h a s i n g l e s t a g e
e l e c t r i c h e a t e r .
P O W E R W I R I N G
L I N E V O L T A G E
T E R M I N A L
B L O C K 2 T B
I N C O N T R O L B O X
G R O U N D L U G
L 1
L 2
L 3
R e f e r t o t h e
E L E C T R I C A L D A T A
t a b l e s t o s i z e t h e
p o w e r w i r i n g , t h e
f u s e s a n d t h e
d i s c o n n e c t s w i t c h .
FIGURE 5 : TYPICAL FIELD WIRING
TABLE 4: GAS HEAT APPLICATION DATA
Input Capacity (Mbh) Output Capacity (Mbh)
0to2000Feet
Above S ea Level
Min. Max. Min. Max. Min. Max. Min. Max.
300 150 270 135 240 213 15 & 20 Ton 279 20 50
400 200 360 180 320 281 15 & 20 Ton 372 30 60
1
Heaters are shipped available fro natural gas, but can be converted to L.P./Propane withKit Model No. 1NP0418.
2
Based on maximum input and 1075/Btu/Ft.
3
The airflow must be adjusted to obtain a temperature rise within the range shown.
4
MBH rating should be reduced at the rate of 4 percent for each 1,000 feet above 4,500 feet.
Unitary Products 9
2,000 to 4,500 Feet
4
Above Sea Level
1
0to2000Feet
Above S ea Level
3
2,000 to 4,500Feet
4
Above Sea Level
Available on
Models
Gas Rate
(Ft.3/Hr.)
Temp Rise °F
2
At Full Input
3
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