Unitary products group Sunline 2000 DM300 Installation Manual
Advertisement
Advertisement
INSTALLATION
MANUAL - 50Hz
CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . .4
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
RENEWAL PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
PRODUCT NOMENCLATURE . . . . . . . . . . . . . . . . . . . .6
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
START-UP (COOLING) . . . . . . . . . . . . . . . . . . . . . . . . .40
START-UP (GAS HEAT) . . . . . . . . . . . . . . . . . . . . . . . .41
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . .43
SUNLINE™ 2000
GAS/ELECTRIC SINGLE PACKAGE
AIR CONDITIONERS
MODELS: DM180, 240 & 300
(Export)
See the following page for a complete Table of Contents.
NOTES, CAUTIONS AND WARNINGS
The 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: READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
035-18940-000-B-1003
035-18940-000-B-1003
TABLE OF CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . .
4
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
RENEWAL PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
PRODUCT NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . .
6
PRODUCT NOMENCLATURE - Continued . . . . . . . . . . . . . . .
7
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
INSTALLATION SAFETY INFORMATION: . . . . . . . . . . . . . . 8
LIMITATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
RIGGING AND HANDLING . . . . . . . . . . . . . . . . . . . . . . . . . 10
CLEARANCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
FIXED OUTDOOR AIR INTAKE DAMPER . . . . . . . . . . . . . 11
CONDENSATE DRAIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
COMPRESSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
SERVICE ACCESS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
THERMOSTAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
POWER AND CONTROL WIRING . . . . . . . . . . . . . . . . . . . 14
OPTIONAL ELECTRIC HEAT . . . . . . . . . . . . . . . . . . . . . . . 14
OPTIONAL GAS HEAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
GAS CONNECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
L.P. UNITS, TANKS AND PIPING. . . . . . . . . . . . . . . . . . . . 16
VENT AND COMBUSTION AIR HOODS . . . . . . . . . . . . . . 17
OPTIONAL ECONOMIZER/MOTORIZED DAMPER RAIN
HOOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
OPTIONAL POWER EXHAUST/BAROMETRIC RELIEF
DAMPER AND RAIN HOOD. . . . . . . . . . . . . . . . . . . . . . 18
OPTIONAL ECONOMIZER AND POWER EXHAUST
DAMPER SET POINT ADJUSTMENTS AND INFORMA-
TION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
MINIMUM POSITION ADJUSTMENT . . . . . . . . . . . . . . . 18
ENTHALPY SET POINT ADJUSTMENT . . . . . . . . . . . . . 18
POWER EXHAUST DAMPER SETPOINT (WITH OR WITH-
OUT POWER EXHAUST). . . . . . . . . . . . . . . . . . . . . . . . 18
INDOOR AIR QUALITY AQ . . . . . . . . . . . . . . . . . . . . . . . 18
PHASING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
CHECKING AIR SUPPLY CFM. . . . . . . . . . . . . . . . . . . . . . 32
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
34
SEQUENCE OF OPERATIONS OVERVIEW . . . . . . . . . . . 34
COOLING SEQUENCE OF OPERATION. . . . . . . . . . . . . . 34
CONTINUOUS BLOWER. . . . . . . . . . . . . . . . . . . . . . . . . 34
INTERMITTENT BLOWER. . . . . . . . . . . . . . . . . . . . . . . . 34
NO OUTDOOR AIR OPTIONS. . . . . . . . . . . . . . . . . . . . . 34
ECONOMIZER WITH SINGLE ENTHALPY SENSOR -. . 34
ECONOMIZER WITH DUAL ENTHALPY SENSORS - . . 35
2
ECONOMIZER (SINGLE OR DUAL) WITH POWER EX-
HAUST - . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
MOTORIZED OUTDOOR AIR DAMPERS - . . . . . . . . . . 35
COOLING OPERATION ERRORS . . . . . . . . . . . . . . . . . 35
HIGH-PRESSURE LIMIT SWITCH . . . . . . . . . . . . . . . . . 35
LOW-PRESSURE LIMIT SWITCH. . . . . . . . . . . . . . . . . . 35
FREEZESTAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
LOW AMBIENT COOLING . . . . . . . . . . . . . . . . . . . . . . . 36
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
COMPRESSOR PROTECTION . . . . . . . . . . . . . . . . . . . . . 36
FLASH CODES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
ELECTRIC HEATING SEQUENCE OF OPERATIONS . . . 36
HEATING OPERATION ERRORS . . . . . . . . . . . . . . . . . . . 37
TEMPERATURE LIMIT . . . . . . . . . . . . . . . . . . . . . . . . . . 37
SAFTEY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
FLASH CODES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
HEAT ANTICIPATOR SETPOINTS . . . . . . . . . . . . . . . . . . 37
GAS HEATING SEQUENCE OF OPERATIONS . . . . . . . . 37
GAS HEATING OPERATION ERRORS . . . . . . . . . . . . . . . 38
TEMPERATURE LIMIT . . . . . . . . . . . . . . . . . . . . . . . . . . 38
GAS VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
FLASH CODES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
RESETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
HEAT ANTICIPATOR SETPOINTS . . . . . . . . . . . . . . . . . . 40
START-UP (COOLING) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
40
PRESTART CHECK LIST. . . . . . . . . . . . . . . . . . . . . . . . . . 40
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . 40
POST START CHECK LIST . . . . . . . . . . . . . . . . . . . . . . . . 40
SHUT DOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
START-UP (GAS HEAT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
41
PRE-START CHECK LIST . . . . . . . . . . . . . . . . . . . . . . . . . 41
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . 41
TO LIGHT PILOT AND MAIN BURNERS: . . . . . . . . . . . . 41
TO SHUT DOWN: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
POST-START CHECK LIST (GAS) . . . . . . . . . . . . . . . . . . 41
MANIFOLD GAS PRESSURE ADJUSTMENT . . . . . . . . . . 42
PILOT CHECKOUT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
BURNER INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . 42
BURNER AIR SHUTTER ADJUSTMENT. . . . . . . . . . . . . . 42
CHECKING GAS INPUT. . . . . . . . . . . . . . . . . . . . . . . . . . . 42
NATURAL GAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
ADJUSTMENT OF TEMPERATURE RISE . . . . . . . . . . . . 43
BELT DRIVE BLOWER. . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
43
COOLING TROUBLE SHOOTING GUIDE . . . . . . . . . . . . . 43
GAS HEAT TROUBLE SHOOTING GUIDE . . . . . . . . . . . . 48
UNIT FLASH CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Unitary Products Group
035-18940-000-B-1003
LIST OF FIGURES
Fig. # Pg. #
1 TYPICAL RIGGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2 CENTER OF GRAVITY . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3 FIXED OUTDOOR AIR DAMPER . . . . . . . . . . . . . . . . . . . 12
4 RECOMMENDED DRAIN PIPING . . . . . . . . . . . . . . . . . . 12
5 FIELD WIRING - DM ELECTRIC/ELECTRIC AND
GAS/ ELECTRIC UNITS . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6 EXTERNAL SUPPLY CONNECTION EXTERNAL
SHUT-OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7 BOTTOM SUPPLY CONNECTION EXTERNAL
SHUT-OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8 VENT AND COMBUSTION AIR HOOD . . . . . . . . . . . . . . 17
9 ENTHALPY SETPOINT ADJUSTMENT . . . . . . . . . . . . . . 19
10 HONEYWELL ECONOMIZER CONTROL W7212 . . . . . . 20
11 FOUR AND SIX POINT LOADS . . . . . . . . . . . . . . . . . . . . 20
12 CENTER OF GRAVITY . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
13 DIMENSIONS & CLEARANCES 15, 20 & 25 TON . . . . . . 25
14 BELT ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
15 PRESSURE DROP ACROSS A DRY INDOOR COIL
VS SUPPLY AIR CFM FOR ALL UNIT TONNAGES . . . . 33
16 GAS VALVE PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
17 GAS VALVE AND CONTROLS . . . . . . . . . . . . . . . . . . . . . 40
18 TYPICAL GAS VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
19 PROPER FLAME ADJUSTMENT . . . . . . . . . . . . . . . . . . . 42
20 TYPICAL FLAME APPEARANCE . . . . . . . . . . . . . . . . . . . 42
LIST OF TABLES
Tbl. # Pg. #
1 UNIT APPLICATION DATA . . . . . . . . . . . . . . . . . . . . . . . . . 9
2 CONTROL WIRE SIZES . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3 ELECTRIC HEAT APPLICATION DATA . . . . . . . . . . . . . . 14
4 GAS HEAT APPLICATION DATA. . . . . . . . . . . . . . . . . . . 15
5 PIPE SIZING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6 FOUR AND SIX POINT LOADS . . . . . . . . . . . . . . . . . . . . 21
7 PHYSICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
8 DM ELECTRICAL DATA -WITHOUT POWERED
CONVENIENCE OUTLET. . . . . . . . . . . . . . . . . . . . . . . . . 23
9 DM ELECTRICAL DATA -WITH POWERED
CONVENIENCE OUTLET. . . . . . . . . . . . . . . . . . . . . . . . . 24
10 SUPPLY AIR BLOWER PERFORMANCE
(15 TON) -COOLING ONLY 180 MBH - BOTTOM
DUCT CONNECTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . 26
11 SUPPLY AIR BLOWER PERFORMANCE (20 TON) -
COOLING ONLY 240 MBH - BOTTOM DUCT
CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
12 SUPPLY AIR BLOWER PERFORMANCE
(15 TON) -GAS HEAT 180 MBH - BOTTOM
DUCT CONNECTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . 28
13 SUPPLY AIR BLOWER PERFORMANCE
(20 TON) - GAS HEAT 240 MBH - BOTTOM DUCT
CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
14 SUPPLY AIR BLOWER PERFORMANCE (25 TON) -
COOLING APPLICATIONS 300 MBH - BOTTOM DUCT
CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
15 STATIC RESISTANCES . . . . . . . . . . . . . . . . . . . . . . . . . . 31
16 POWER EXHAUST PERFORMANCE . . . . . . . . . . . . . . . 31
17 BLOWER MOTOR AND DRIVE DATA . . . . . . . . . . . . . . . 31
18 LIMIT CONTROL SETTING . . . . . . . . . . . . . . . . . . . . . . . 37
19 ELECTRIC HEAT ANTICIPATOR SETPOINTS . . . . . . . . 37
20 LIMIT CONTROL SETTING . . . . . . . . . . . . . . . . . . . . . . . 39
21 GAS HEAT ANTICIPATOR SETPOINTS . . . . . . . . . . . . . 40
22 GAS RATE - CUBIC FEET PER HOUR . . . . . . . . . . . . . . 43
23 UNIT CONTROL BOARD FLASH CODES . . . . . . . . . . . . 51
Unitary Products Group 3
035-18940-000-B-1003
GENERAL
YORK Model DM units are either single package air conditions equipped with optional factory installed electric heaters, or single package gas-fired central heating furnaces with cooling unit. Both are designed for outdoor installation on a rooftop or 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 supplemental electric heaters have nickel-chrome elements and utilize single point power connection.
These gas-fired heaters have aluminized-steel or optional stainless steel, tubular heat exchangers with spark ignition with proven pilot. All gas heaters are shipped from the factory equipped for natural gas use, but can be field converted to L.P./ Propane with Kit
Model # 1NP0418. See Gas Heat Application Data
Table.
SAFETY CONSIDERATIONS
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 accompanying the equipment whenever working on air conditioning equipment. Be sure to follow all other safety precautions that apply.
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.
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly could result in serious injury, death, or property damage.
- Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
- WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Leave the building immediately.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
• If you cannot reach the gas supplier, call the fire department.
- Installation and service must be performed by a qualified installer, service agency or the gas supplier.
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:
• 530.18-44320-10 - Barometric Relief
Damper Accessory
4 Unitary Products Group
035-18940-000-B-1003
• 035-23005-000 - Economizer Damper
Accessory
• 035-08032-002 - Propane Conversion
Accessory (USA)
• 035-13073-001 - High Altitude Accessory
(Nat. Gas)
• 035-08524-002 - High Altitude Accessory
(Propane)
RENEWAL PARTS
Refer to York USER'S MAINTENANCE and SERVICE
INFORMATION MANUAL Part Number 035-18843-
001.
APPROVALS
Design certified by CSA as follows:
• For use as a cooling unit only with or without optional electric heat.
• For use as a forced air furnace with cooling unit
• For outdoor installation only.
• For installation on combustible material.
• For use with natural gas or propane gas.
THIS PRODUCT MUST BE INSTALLED IN
STRICT COMPLIANCE WITH THE
ENCLOSED INSTALLATION INSTRUC-
TIONS AND ANY APPLICABLE LOCAL,
STATE, AND NATIONAL CODES INCLUD-
ING, BUT NOT LIMITED TO, BUILDING,
ELECTRICAL, AND MECHANICAL CODES.
IMPROPER INSTALLATION MAY CREATE A
CONDITION WHERE THE OPERATION OF
THE PRODUCT COULD CAUSE PERSONAL
INJURY OR PROPERTY DAMAGE.
The 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.
Unitary Products Group 5
PRODUCT NOMENCLATURE
035-18940-000-B-1003
6 Unitary Products Group
035-18940-000-B-1003
PRODUCT NOMENCLATURE - CONTINUED
15-25T Sunline™ 2000 Model Number Nomenclature
AA = None
AB = Phase Monitor
AC = Coil Guard
AD = Dirty Filter Switch
AE = Phase Monitor & Coil Guard
AF = Phase Monitor & Dirty Filter Switch
AG = Coil Guard & Dirty Filter Switch
AH = Phase Monitor, Coil Guard, & Dirty Filter Switch
CA = CPC Controller with Dirty Filter Switch & Air Proving Switch
CB = CPC Controller, DFS, APS & Phase Monitor
CC = CPC Controller, DFS, APS & Coil Guard
CD = CPC Controller, DFS, APS, Phase Monitor, & Coil Guard
CE = CPC Controller, DFS, APS & Technicoat Cond. Coil
CF = CPC Controller, DFS, APS, Technicoat Cond. Coil, & Phase Monitor
CG = CPC Controller, DFS, APS, Technicoat Cond. Coil, & Coil Guard
CH = CPC Controller, DFS, APS, Technicoat Cond. Coil, Phase Monitor, & Coil Guard
CJ = CPC Controller, DFS, APS & Technicoat Evap. Coil
CK = CPC Controller, DFS, APS, Technicoat Evap. Coil, & Phase Monitor
CL = CPC Controller, DFS, APS, Technicoat Evap. Coil, & Coil Guard
CM = CPC Controller, DFS, APS, Technicoat Evap. Coil, Phase Monitor, & Coil Guard
CN = CPC Controller, DFS, APS & Technicoat Evap. & Cond Coils
CP = CPC Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Phase Monitor
CQ = CPC Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Coil Guard
CR = CPC Controller, DFS, APS, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard
JA = Johnson UNT Controller with Dirty Filter Switch & Air Proving Switch
JB = Johnson UNT Controller, DFS, APS & Phase Monitor
JC = Johnson UNT Controller, DFS, APS & Coil Guard
JD = Johnson UNT Controller, DFS, APS, Phase Monitor, & Coil Guard
JE = Johnson UNT Controller, DFS, APS & Technicoat Cond. Coil
JF = Johnson UNT Controller, DFS, APS, Technicoat Cond. Coil, & Phase Monitor
JG = Johnson UNT Controller, DFS, APS, Technicoat Cond. Coil, & Coil Guard
JH = Johnson UNT Controller, DFS, APS, Technicoat Cond. Coil, Phase Monitor, & Coil Guard
JJ = Johnson UNT Controller, DFS, APS & Technicoat Evap. Coil
JK = Johnson UNT Controller, DFS, APS, Technicoat Evap. Coil, & Phase Monitor
JL = Johnson UNT Controller, DFS, APS, Technicoat Evap. Coil, & Coil Guard
JM = Johnson UNT Controller, DFS, APS, Technicoat Evap. Coil, Phase Monitor, & Coil Guard
JN = Johnson UNT Controller, DFS, APS & Technicoat Evap. & Cond Coils
JP = Johnson UNT Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Phase Monitor
JQ = Johnson UNT Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Coil Guard
JR = Johnson UNT Controller, DFS, APS, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard
KG = Kohl's Unit w/Fixed Pulley, Construction T/Stat, 4" Filters etc.
HA = Honeywell Excel 10 Controller with Dirty Filter Switch & Air Proving Switch
HB = Honeywell Excel 10 Controller, DFS, APS & Phase Monitor
HC = Honeywell Excel 10 Controller, DFS, APS & Coil Guard
HD = Honeywell Excel 10 Controller, DFS, APS, Phase Monitor, & Coil Guard
HE = Honeywell Excel 10 Controller, DFS, APS & Technicoat Cond. Coil
HF = Honeywell Excel 10 Controller, DFS, APS, Technicoat Cond. Coil, & Phase Monitor
HG = Honeywell Excel 10 Controller, DFS, APS, Technicoat Cond. Coil, & Coil Guard
HH = Honeywell Excel 10 Controller, DFS, APS, Technicoat Cond. Coil, Phase Monitor, & Coil Guard
HJ = Honeywell Excel 10 Controller, DFS, APS & Technicoat Evap. Coil
HK = Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. Coil, & Phase Monitor
HL = Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. Coil, & Coil Guard
HM = Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. Coil, Phase Monitor, & Coil Guard
HN = Honeywell Excel 10 Controller, DFS, APS & Technicoat Evap. & Cond Coils
HP = Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Phase Monitor
HQ = Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Coil Guard
HR = Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard
NA = Novar ETC-3 Controller with Dirty Filter Switch & Air Proving Switch
NB = Novar ETC-3 Controller, DFS, APS & Phase Monitor
NC = Novar ETC-3 Controller, DFS, APS & Coil Guard
ND = Novar ETC-3 Controller, DFS, APS, Phase Monitor, & Coil Guard
NE = Novar ETC-3 Controller, DFS, APS & Technicoat Cond. Coil
NF = Novar ETC-3 Controller, DFS, APS, Technicoat Cond. Coil, & Phase Monitor
NG = Novar ETC-3 Controller, DFS, APS, Technicoat Cond. Coil, & Coil Guard
NH = Novar ETC-3 Controller, DFS, APS, Technicoat Cond. Coil, Phase Monitor, & Coil Guard
NJ = Novar ETC-3 Controller, DFS, APS & Technicoat Evap. Coil
NK = Novar ETC-3 Controller, DFS, APS, Technicoat Evap. Coil, & Phase Monitor
NL = Novar ETC-3 Controller, DFS, APS, Technicoat Evap. Coil, & Coil Guard
NM = Novar ETC-3 Controller, DFS, APS, Technicoat Evap. Coil, Phase Monitor, & Coil Guard
NN = Novar ETC-3 Controller, DFS, APS & Technicoat Evap. & Cond Coils
NP = Novar ETC-3 Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Phase Monitor
NQ = Novar ETC-3 Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Coil Guard
NR = Novar ETC-3 Controller, DFS, APS, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard
RA = Shipping Bag
RC = Coil Guard, Shipping Bag & American Flag
TA = Technicoat Condenser Coil
TB = Technicoat Condenser Coil & Phase Monitor
TC = Technicoat Condenser Coil & Coil Guard
TD = Technicoat Condenser Coil & Dirty Filter Switch
TE = Technicoat Condenser Coil, Phase Monitor, & Coil Guard
TF = Technicoat Condenser Coil, Phase Monitor, & Dirty Filter Switch
TG = Technicoat Condenser Coil, Coil Guard, & Dirty Filter Switch
TH = Technicoat Condenser Coil, Phase Monitor, Coil Guard, & Dirty Filter Switch
TJ = Technicoat Evaporator Coil
TK = Technicoat Evaporator Coil & Phase Monitor
TL = Technicoat Evaporator Coil & Coil Guard
TM = Technicoat Evaporator Coil & Dirty Filter Switch
TN = Technicoat Evaporator Coil, Phase Monitor, & Coil Guard
TP = Technicoat Evaporator Coil, Phase Monitor, & Dirty Filter Switch
TQ = Technicoat Evaporator Coil, Coil Guard, & Dirty Filter Switch
TR = Technicoat Evaporator Coil, Phase Monitor, Coil Guard, & Dirty Filter Switch
TS = Technicoat Evaporator & Condenser Coils
TT = Technicoat Evaporator & Condenser Coils & Phase Monitor
TU = Technicoat Evaporator & Condenser Coils & Coil Guard
TV = Technicoat Evaporator & Condenser Coils & Dirty Filter Switch
TW = Technicoat Evaporator & Condenser Coils, Phase Monitor, & Coil Guard
TX = Technicoat Evaporator & Condenser Coils, Phase Monitor, & Dirty Filter Switch
TY = Technicoat Evaporator & Condenser Coils, Coil Guard, & Dirty Filter Switch
TZ = Technicoat Evaporator & Condenser Coils, Phase Monitor, Coil Guard, & Dirty Filter Switch
Additional Options
BA = Hinged Filter Door & Tooless Access Panels
BB = Phase Monitor, Hinged Filter Door & Tooless Access Panels
BC = Coil Guard, Hinged Filter Door & Tooless Access Panels
BD = Dirty Filter Switch, Hinged Filter Door & Tooless Access Panels
BE = Phase Monitor & Coil Guard, Hinged Filter Door & Tooless Access Panels
BF = Phase Monitor & Dirty Filter Switch, Hinged Filter Door & Tooless Access Panels
BG = Coil Guard & Dirty Filter Switch, Hinged Filter Door & Tooless Access Panels
BH = Phase Monitor, Coil Guard, & Dirty Filter Switch, Hinged Filter Door & Tooless Access Panels
DA = CPC Controller with Dirty Filter Switch & Air Proving Switch, Hinged Filter Door & Tooless Access Panels
DB = CPC Controller, DFS, APS & Phase Monitor, Hinged Filter Door & Tooless Access Panels
DC = CPC Controller, DFS, APS & Coil Guard, Hinged Filter Door & Tooless Access Panels
DD = CPC Controller, DFS, APS, Phase Monitor, & Coil Guard, Hinged Filter Door & Tooless Access Panels
DE = CPC Controller, DFS, APS & Technicoat Cond. Coil, Hinged Filter Door & Tooless Access Panels
DF = CPC Controller, DFS, APS, Technicoat Cond. Coil, & Phase Monitor, Hinged Filter Door & Tooless Access Panels
DG = CPC Controller, DFS, APS, Technicoat Cond. Coil, & Coil Guard, Hinged Filter Door & Tooless Access Panels
DH = CPC Controller, DFS, APS, Technicoat Cond. Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Tooless Access Panels
DJ = CPC Controller, DFS, APS & Technicoat Evap. Coil, Hinged Filter Door & Tooless Access Panels
DK = CPC Controller, DFS, APS, Technicoat Evap. Coil, & Phase Monitor, Hinged Filter Door & Tooless Access Panels
DL = CPC Controller, DFS, APS, Technicoat Evap. Coil, & Coil Guard, Hinged Filter Door & Tooless Access Panels
DM = CPC Controller, DFS, APS, Technicoat Evap. Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Tooless Access Panels
DN = CPC Controller, DFS, APS & Technicoat Evap. & Cond Coils, Hinged Filter Door & Tooless Access Panels
DP = CPC Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Phase Monitor, Hinged Filter Door & Tooless Access Panels
DQ = CPC Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Coil Guard, Hinged Filter Door & Tooless Access Panels
DR = CPC Controller, DFS, APS, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard, Hinged Filter Door & Tooless Access Panels
EA = Johnson UNT Controller with Dirty Filter Switch & Air Proving Switch, Hinged Filter Door & Tooless Access Panels
EB = Johnson UNT Controller, DFS, APS & Phase Monitor, Hinged Filter Door & Tooless Access Panels
EC = Johnson UNT Controller, DFS, APS & Coil Guard, Hinged Filter Door & Tooless Access Panels
ED = Johnson UNT Controller, DFS, APS, Phase Monitor, & Coil Guard, Hinged Filter Door & Tooless Access Panels
EE = Johnson UNT Controller, DFS, APS & Technicoat Cond. Coil, Hinged Filter Door & Tooless Access Panels
EF = Johnson UNT Controller, DFS, APS, Technicoat Cond. Coil, & Phase Monitor, Hinged Filter Door & Tooless Access Panels
EG = Johnson UNT Controller, DFS, APS, Technicoat Cond. Coil, & Coil Guard, Hinged Filter Door & Tooless Access Panels
EH = Johnson UNT Controller, DFS, APS, Technicoat Cond. Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Tooless Access Panels
EJ = Johnson UNT Controller, DFS, APS & Technicoat Evap. Coil, Hinged Filter Door & Tooless Access Panels
EK = Johnson UNT Controller, DFS, APS, Technicoat Evap. Coil, & Phase Monitor, Hinged Filter Door & Tooless Access Panels
EL = Johnson UNT Controller, DFS, APS, Technicoat Evap. Coil, & Coil Guard, Hinged Filter Door & Tooless Access Panels
EM = Johnson UNT Controller, DFS, APS, Technicoat Evap. Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Tooless Access Panels
EN = Johnson UNT Controller, DFS, APS & Technicoat Evap. & Cond Coils, Hinged Filter Door & Tooless Access Panels
EP = Johnson UNT Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Phase Monitor, Hinged Filter Door & Tooless Access Panels
EQ = Johnson UNT Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Coil Guard, Hinged Filter Door & Tooless Access Panels
ER = Johnson UNT Controller, DFS, APS, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard, Hinged Filter Door & Tooless Access Panels
GA = Honeywell Excel 10 Controller with Dirty Filter Switch & Air Proving Switch, Hinged Filter Door & Tooless Access Panels
GB = Honeywell Excel 10 Controller, DFS, APS & Phase Monitor, Hinged Filter Door & Tooless Access Panels
GC = Honeywell Excel 10 Controller, DFS, APS & Coil Guard, Hinged Filter Door & Tooless Access Panels
GD = Honeywell Excel 10 Controller, DFS, APS, Phase Monitor, & Coil Guard, Hinged Filter Door & Tooless Access Panels
GE = Honeywell Excel 10 Controller, DFS, APS & Technicoat Cond. Coil, Hinged Filter Door & Tooless Access Panels
GF = Honeywell Excel 10 Controller, DFS, APS, Technicoat Cond. Coil, & Phase Monitor, Hinged Filter Door & Tooless Access Panels
GG = Honeywell Excel 10 Controller, DFS, APS, Technicoat Cond. Coil, & Coil Guard, Hinged Filter Door & Tooless Access Panels
GH = Honeywell Excel 10 Controller, DFS, APS, Technicoat Cond. Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Tooless Access Panels
GJ = Honeywell Excel 10 Controller, DFS, APS & Technicoat Evap. Coil, Hinged Filter Door & Tooless Access Panels
GK = Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. Coil, & Phase Monitor, Hinged Filter Door & Tooless Access Panels
GL = Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. Coil, & Coil Guard, Hinged Filter Door & Tooless Access Panels
GM = Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Tooless Access Panels
GN = Honeywell Excel 10 Controller, DFS, APS & Technicoat Evap. & Cond Coils, Hinged Filter Door & Tooless Access Panels
GP = Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Phase Monitor, Hinged Filter Door & Tooless Access Panels
GQ = Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Coil Guard, Hinged Filter Door & Tooless Access Panels
GR = Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard, Hinged Filter Door & Tooless Access Panels
PA = Novar ETC-3 Controller with Dirty Filter Switch & Air Proving Switch, Hinged Filter Door & Tooless Access Panels
PB = Novar ETC-3 Controller, DFS, APS & Phase Monitor, Hinged Filter Door & Tooless Access Panels
PC = Novar ETC-3 Controller, DFS, APS & Coil Guard, Hinged Filter Door & Tooless Access Panels
PD = Novar ETC-3 Controller, DFS, APS, Phase Monitor, & Coil Guard, Hinged Filter Door & Tooless Access Panels
PE = Novar ETC-3 Controller, DFS, APS & Technicoat Cond. Coil, Hinged Filter Door & Tooless Access Panels
PF = Novar ETC-3 Controller, DFS, APS, Technicoat Cond. Coil, & Phase Monitor, Hinged Filter Door & Tooless Acce
PG = Novar ETC-3 Controller, DFS, APS, Technicoat Cond. Coil, & Coil Guard, Hinged Filter Door & Tooless Access Panels
PH = Novar ETC-3 Controller, DFS, APS, Technicoat Cond. Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Tooless Access Panels
PJ = Novar ETC-3 Controller, DFS, APS & Technicoat Evap. Coil, Hinged Filter Door & Tooless Access Panels
PK = Novar ETC-3 Controller, DFS, APS, Technicoat Evap. Coil, & Phase Monitor, Hinged Filter Door & Tooless Access Panels
PL = Novar ETC-3 Controller, DFS, APS, Technicoat Evap. Coil, & Coil Guard, Hinged Filter Door & Tooless Access Panels
PM = Novar ETC-3 Controller, DFS, APS, Technicoat Evap. Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Tooless Access Panels
PN = Novar ETC-3 Controller, DFS, APS & Technicoat Evap. & Cond Coils, Hinged Filter Door & Tooless Access Panels
PP = Novar ETC-3 Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Phase Monitor, Hinged Filter Door & Tooless Access Panels
PQ = Novar ETC-3 Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Coil Guard, Hinged Filter Door & Tooless Access Panels
PR = Novar ETC-3 Controller, DFS, APS, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard, Hinged Filter Door & Tooless Access Panels
RC = Coil Guard, Small 'Made In USA' Flag Decal
UA = Technicoat Condenser Coil, Hinged Filter Door & Tooless Access Panels
UB = Technicoat Condenser Coil & Phase Monitor, Hinged Filter Door & Tooless Access Panels
UC = Technicoat Condenser Coil & Coil Guard, Hinged Filter Door & Tooless Access Panels
UD = Technicoat Condenser Coil & Dirty Filter Switch, Hinged Filter Door & Tooless Access Panels
UE = Technicoat Condenser Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Tooless Access Panels
UF = Technicoat Condenser Coil, Phase Monitor, & Dirty Filter Switch, Hinged Filter Door & Tooless Access Panels
UG = Technicoat Condenser Coil, Coil Guard, & Dirty Filter Switch, Hinged Filter Door & Tooless Access Panels
UH = Technicoat Condenser Coil, Phase Monitor, Coil Guard, & Dirty Filter Switch, Hinged Filter Door & Tooless Access Panels
UJ = Technicoat Evaporator Coil, Hinged Filter Door & Tooless Access Panels
UK = Technicoat Evaporator Coil & Phase Monitor, Hinged Filter Door & Tooless Access Panels
UL = Technicoat Evaporator Coil & Coil Guard, Hinged Filter Door & Tooless Access Panels
UM = Technicoat Evaporator Coil & Dirty Filter Switch, Hinged Filter Door & Tooless Access Panels
UN = Technicoat Evaporator Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Tooless Access Panels
UP = Technicoat Evaporator Coil, Phase Monitor, & Dirty Filter Switch, Hinged Filter Door & Tooless Access Panels
UQ = Technicoat Evaporator Coil, Coil Guard, & Dirty Filter Switch, Hinged Filter Door & Tooless Access Panels
UR = Technicoat Evaporator Coil, Phase Monitor, Coil Guard, & Dirty Filter Switch, Hinged Filter Door & Tooless Access Panels
US = Technicoat Evaporator & Condenser Coils, Hinged Filter Door & Tooless Access Panels
UT = Technicoat Evaporator & Condenser Coils & Phase Monitor, Hinged Filter Door & Tooless Access Panels
UU = Technicoat Evaporator & Condenser Coils & Coil Guard, Hinged Filter Door & Tooless Access Panels
UV = Technicoat Evaporator & Condenser Coils & Dirty Filter Switch, Hinged Filter Door & Tooless Access Panels
UW = Technicoat Evaporator & Condenser Coils, Phase Monitor, & Coil Guard, Hinged Filter Door & Tooless Access Panels
UX = Technicoat Evaporator & Condenser Coils, Phase Monitor, & Dirty Filter Switch, Hinged Filter Door & Tooless Access Panels
UY = Technicoat Evaporator & Condenser Coils, Coil Guard, & Dirty Filter Switch, Hinged Filter Door & Tooless Access Panels
UZ = Technicoat Evaporator & Condenser Coils, Phase Monitor, Coil Guard, & Dirty Filter Switch, Hinged Filter Door & Tooless Access Panels
Unitary Products Group 7
INSTALLATION
INSTALLATION SAFETY INFORMATION:
Read these instructions before continuing this appliance installation. This is an outdoor combination heating and cooling unit. The installer must assure that these instructions are made available to the consumer and with instructions to retain them for future reference.
1. Refer to the unit rating plate for the approved type of gas for this unit.
2. Install this unit only in a location and position as specified on Page 10 of these instructions.
3. Never test for gas leaks with an open flame. Use commercially available soap solution made specifically for the detection of leaks when checking all connections, as specified on Pages 8, 16, 17 and
40 of these instructions.
4. Always install unit to operate within the furnace's intended temperature-rise range with the duct system and within the allowable external static pressure range, as specified on the unit name/rating plate, specified on Page 42 of these instructions.
5. This equipment is not to be used for temporary heating of buildings or structures under construction.
FIRE OR EXPLOSION HAZARD
FAILURE TO FOLLOW THE SAFETY WARN-
ING EXACTLY COULD RESULT IN SERIOUS
INJURY, DEATH OR PROPERTY DAMAGE.
NEVER TEST FOR GAS LEAKS WITH AN
OPEN FLAME. USE A COMMERICALLY
AVAILABLE SOAP SOLUTION MADE SPE-
CIFICALLY FOR THE DETECTION OF
LEAKS TO CHECK ALL CONNECTIONS. A
FIRE OR EXPLOSION MAY RESULT CAUS-
ING PROPERTY DAMAGE, PERSONAL
INJURY OR LOSS OF LIFE.
035-18940-000-B-1003
LIMITATIONS
These units must be installed in accordance with the following national and local safety codes:
In U.S.A.:
• National Electrical Code ANSI/NFPA No.
70.
• National Fuel Gas Code Z223.1.
• Gas-Fired Central Furnace Standard ANSI
Z21.47a.
• Local gas utility requirements.
In Canada:
• Current Canadian Electrical Code C22.1.
• Current Gas Installation Codes CSA-
B149.1.
• Local plumbing and waste water codes.
• Other applicable local codes.
Refer to the Unit Application Data table and to the Gas
Heat Application Data table.
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.
Size of unit for proposed installation should be based on heat loss/heat gain calculation made according to the methods of the Air Conditioning Contractors of
America (ACCA).
This equipment is not to be used for temporary heating of buildings or structures under construction.
International:
• Local Government/Agency Regulations
8 Unitary Products Group
035-18940-000-B-1003
TABLE 1: UNIT APPLICATION DATA
UNIT MODEL NUMBER
Voltage Variation,
Min. / Max.
1
380/415-3-50
Supply Air CFM, Min. / Max.
Wet Bulb Temperature (ºF) of Air on
Evaporator Coil, Min. / Max.
Dry Bulb Temperature (ºF) of Air on
Condenser Coil, Min. / Max.
DM180
4,500 / 7,200
1.
Utilization range “A” in accordance with ARI Standard 110.
LOCATION
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.
3. Where a choice of location is possible, position the unit on either north or east side of building.
4. 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 inches greater than the unit base rails. Do not tie slab to the building foundation.
5. 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.
6. Maintain level tolerance to 1/2 inch maximum across the entire length or width of the unit.
DM240
342/456
6,000 / 9,400
57 / 72
0 / 125
Excessive exposure of this furnace to contaminated combustion air may result in 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.
DM300
7,500 / 12,500
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.
Unitary Products Group 9
035-18940-000-B-1003
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. Refer to
Figure 1.
Units may also be moved or lifted with a forklift, from the side only , providing that an accessory skid is used.
LENGTH OF FORKS MUST BE A MINIMUM OF 90".
Refer to the Physical Data Table 7 for unit weights and to the Figures 2 or 12 for approximate center of gravity.
FIGURE 2 - CENTER OF GRAVITY
Before lifting a unit, make sure that all panels are in place and that its weight is distributed equally on all cables so it will lift evenly.
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 Vent and Combustion Hood Figure 8).
CLEARANCES
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
CSA-B149.1 (in Canada) and/or applicable provisions of the local building codes. Refer to Dimensions and
Clearances Figure 13 for the clearances required for combustible construction, servicing, and proper unit operation.
FIGURE 1 TYPICAL RIGGING
10 Unitary Products Group
035-18940-000-B-1003
Do not permit overhanging structures or shrubs to obstruct outdoor air discharge outlet, combustion air inlet or vent outlets.
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 noise.
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.
When fastening ductwork to side duct flanges on unit, insert screws through duct flanges only. DO NOT insert screws through casing.
Outdoor ductwork must be insulated and waterproofed.
Refer to Dimensions and Clearances Figure 13 for information concerning side and bottom supply and return air duct openings.
NOTE: It is recommended that, in Canada, the outlet duct be provided with a removable access panel. It is recommended that this opening be accessible when the unit is installed in service, and of a size such that smoke or reflected light may be observed inside the casing to indicate the presence of leaks in the heat exchanger.
The cover should be attached in a manner adequate to prevent leakage.
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 the Fixed Outdoor
Damper Figure 3.
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 inch 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 the front hood panel or the screen on the bottom of the hood. Damper baffle in position 1 will allow approximately 10% outdoor air flow, position 2 approximately 15% and, to allow approximately 25%, remove the damper baffle.
On units with bottom return air application 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. Secure with 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 an opening 16 inches high by 18 inches wide in the ductwork to accommodate the damper. Using the holes in the hood flanges as a template, drill 9/64 inch dia. (#26 drill) holes into the ductwork and secure with the screws provided.
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 air access panel, per the instructions 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 the opening cover.
Unitary Products Group 11
035-18940-000-B-1003
COMPRESSORS
Units are shipped with compressor mountings factoryadjusted and ready for operation.
FIGURE 3 - FIXED OUTDOOR AIR DAMPER
CONDENSATE DRAIN
Plumbing must conform to local codes. Use a sealing compound on male pipe threads. Install a condensate drain line from the one-inch NPT female connection on the unit to an open drain.
NOTE: The condensate drain operates in a negative pressure in the cabinet. The condensate drain line MUST be trapped to provide proper drainage. See Figure 4.
Do not loosen compressor mounting bolts.
FILTERS
Two-inch or four-inch filters can be supplied with each unit. 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 Physical Data Table 7.
SERVICE ACCESS
The following removable panels provide access to all serviceable components:
• Compressor compartment
• Electric Heat compartment
• Gas Heat compartment (Two panels)
• Side Supply & Return Air compartments
(Two panels)
• Blower compartment (Three panels)
• Main control box
• Filter compartment
• Outdoor Air compartment (Two panels)
Refer to the Dimensions and Clearances Figure 13 for location of these access panels.
Make sure that all screws and panel latches are replaced and properly positioned on the unit to maintain an airtight seal.
FIGURE 4 - RECOMMENDED DRAIN PIPING
12 Unitary Products Group
035-18940-000-B-1003
THERMOSTAT
TERMINALS
G
R
C
W1
W2
1
Y1
Y2
2
4
RC
OCC
5
6
X
CONTROL
TERMINAL
BLOCK
W1
W2
Y1
G
OCC
P
P1
Y2
X
R
SD
C
Smoke
Detector
R
SD
SD
C
Jumper
3
24 VAC
Class 2
TERMINALS ON
A LIMITED
NUMBER OF
THERMOSTATS
1 Second stage heating not required on single stage heating units.
2 Second stage cooling not required on single stage cooling units.
3 Jumper is required if there is no Smoke Detector circuit.
4 Jumper is required for any combination of R, RC, or RH.
5 OCC is an output from the thermostat to indicate the Occupied condition.
6 X is an input to the thermostat to display Error Status conditions.
FIGURE 5 - FIELD WIRING - DM ELECTRIC/ELECTRIC AND GAS/ ELECTRIC UNITS
Unitary Products Group 13
035-18940-000-B-1003
THERMOSTAT
The room thermostat should be located on an inside wall approximately 56 inches 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. A minimum of seven color-coded insulated wires (#18 AWG) should be used to connect thermostat to unit.
POWER AND CONTROL WIRING
Field wiring to the unit must conform to provisions of the National Electrical Code, ANSI / NFPA No. 70 (in
U.S.A.), current Canadian Electrical Code C22.1 (in
Canada) and/or local ordinances. The unit must be electrically grounded in accordance with NEC and CEC
(as specified above) 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 the Unit Application Data table.
The internal wiring harness furnished with this unit is an integral part of a CSA design certified unit. Field alteration to comply with electrical codes should not be required.
A fused disconnect switch should be field provided for the unit. The switch must be separate from all other circuits. Wire entry at knockout openings require conduit fittings to comply with NEC (in U.S.A.), CEC (in Canada) and/or local codes. Refer to the Dimensions and
Clearances Figure 13 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.
Use copper conductors only. Each unit must be wired
TABLE 3: ELECTRIC HEAT APPLICATION DATA
NOMINAL
HEATER SIZE
(KW)
18
36
54
72
VOLTAGE
3-PHASE,
50 HZ
380/415
380/415
380/415
380/415 with a separate branch circuit fed directly from the meter panel and properly fused.
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 the Typical Field Wiring Figure 5 and to the appropriate unit wiring diagram for control circuit and power wiring information.
TABLE 2: CONTROL WIRE SIZES
Wire Size
18 AWG
Maximum Length
1
150 Feet
1.
From the unit to the thermostat and back to the unit.
OPTIONAL ELECTRIC HEAT
The factory-installed heaters are wired for single point power supply. Power supply need only be brought into the single point terminal block and thermostat wiring to the low voltage terminal strip located in the upper portion of the unit control box.
These CSA approved heaters are located within the central compartment of the unit with the heater elements extending into the supply air chamber. Refer to
Figure 13 for access panel location.
Fuses are supplied, where required, by the factory.
Some KW sizes require fuses and others do not. Refer to Table 3 for minimum CFM limitations and to Tables 8 and 9 for electrical data.
15 TON
4500
4500
5000
5000
MINIMUM CFM UNIT SIZE
20 TON
6000
6000
6000
6000
25 TON
7500
7500
7500
7500
14 Unitary Products Group
035-18940-000-B-1003
OPTIONAL GAS HEAT
These gas-fired heaters have aluminized-steel or optional stainless steel, tubular heat exchangers with spark ignition with proven pilot.
TABLE 4: GAS HEAT APPLICATION DATA
Max.
300
400
0 To
2,000 Feet
Above
Sea Level
Min.
150
200
Max.
270
360
2,000 To
4,500 Feet
Above
Sea Level
Min.
135
180
Output Capacity (Mbh)
0 To
2,000 Feet
Above
Sea Level
Max.
2,000 To
4,500 Feet
Above
Sea Level
Max.
240
320
213
281
All gas heaters are shipped from the factory equipped for natural gas use, but can be field converted to L.P./
Propane with Kit Model # 1NP0418. See Gas Heat
Application Data Table.
Available on Models
15, 20 & 25 Ton
15, 20 & 25 Ton
Gas
Rate
(Ft./Hr.)
279
372
Min.
20
30
Temp.
Rise ºF
At
Full Input
Max.
50
60
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
(in U.S.A.) or the current Gas Installation Codes CSA-
B149.1 (in Canada) should be followed in all cases unless superseded by local codes or gas utility requirements. Refer to the Pipe Sizing 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 specifying a minimum diameter for gas piping.
All units require a one-inch pipe connection at the entrance fitting.
TABLE 5: PIPE SIZING
Length in Feet
10
20
30
40
50
60
70
80
90
100
Nominal Iron Pipe Size
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
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).
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 the
Dimensions and Clearances Figure 13 to locate these access openings. Typical supply piping arrangements are shown in the figures on page 16. All shaded items are field-supplied.
If gas supply line is routed through the unit's base ensure that the burner assembly can be removed for maintenance without disturbing the supply line. The supply piping and fittings must lie below the bottom gas manifold to avoid interference with the burner assembly.
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 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.
Unitary Products Group 15
7. A 1/8 inch NPT plugged tap, accessible for test gage connection, must be installed immediately upstream of the gas supply connection to the furnace.
035-18940-000-B-1003 supply piping system at test pressures equal to or less than 1/2 psig (3.48kPa).
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, Clyde'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.
FIGURE 6 - EXTERNAL SUPPLY CONNECTION
EXTERNAL SHUT-OFF
FIRE OR EXPLOSION HAZARD
FAILURE TO FOLLOW THE SAFETY WARN-
ING EXACTLY COULD RESULT IN SERIOUS
INJURY, DEATH OR PROPERTY DAMAGE.
NEVER TEST FOR GAS LEAKS WITH AN
OPEN FLAME. USE A COMMERICALLY
AVAILABLE SOAP SOLUTION MADE SPE-
CIFICALLY FOR THE DETECTION OF
LEAKS TO CHECK ALL CONNECTIONS. A
FIRE OR EXPLOSION MAY RESULT CAUS-
ING PROPERTY DAMAGE, PERSONAL
INJURY OR LOSS OF LIFE.
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 shutoff valve during any pressure testing of the gas
FIGURE 7 - BOTTOM SUPPLY CONNECTION
EXTERNAL SHUT-OFF
L.P. 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 1NP0418.
All L.P./propane gas equipment must conform to the safety standards of the National Fire Protection Association.
16 Unitary Products Group
035-18940-000-B-1003
For satisfactory operation, L.P./propane gas pressure must be 8.8 I.W.C. at the unit manifold under full load.
Maintaining proper gas pressure depends on three main factors:
1. The vaporization rate 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 regulator 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 compounds 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 .
the blower compartment. These hoods must be installed to assure proper unit function. All hoods must be fastened to the outside of the gas heat access panel with the screws provided in the bag also attached to the blower housing.
The screen for the combustion air intake hood is secured to the inside of the access panel opening with four fasteners and the screws used for mounting the hood to the panel. The top flange of this hood slips in under the top of the access panel opening when installing. Refer to Vent and Combustion Air Hood Figure 8.
Each vent hood is installed by inserting the top flange of the hood into the slotted opening in the access panel and securing in place.
The products of combustion are discharged horizontally through these two screened, hooded vent openings on the upper gas heat access panel.
VENT AIR
OUTLET
HOODS
SLOTTED
OPENINGS IN
ACCESS PANEL
COMBUSTION
AIR INTAKE
HOOD
FIRE OR EXPLOSION HAZARD
FAILURE TO FOLLOW THE SAFETY WARN-
ING EXACTLY COULD RESULT IN SERIOUS
INJURY, DEATH OR PROPERTY DAMAGE.
NEVER TEST FOR GAS LEAKS WITH AN
OPEN FLAME. USE A COMMERICALLY
AVAILABLE SOAP SOLUTION MADE SPE-
CIFICALLY FOR THE DETECTION OF
LEAKS TO CHECK ALL CONNECTIONS. A
FIRE OR EXPLOSION MAY RESULT CAUS-
ING PROPERTY DAMAGE, PERSONAL
INJURY OR LOSS OF LIFE.
VENT AND COMBUSTION AIR HOODS
Two vent hoods and a combustion air hood (with screens) are shipped attached to the blower housing in
GAS HEAT
ACCESS
PANELS
FIGURE 8 - VENT AND COMBUSTION AIR HOOD
OPTIONAL ECONOMIZER/MOTORIZED DAMPER RAIN
HOOD
The instruction for the optional economizer/motorized damper rain hood can be found in form 035-23005-
000. Use these instructions when field assembling an economizer rain hood onto a unit. The outdoor and return air dampers, the damper actuator, the damper linkage, the outdoor and return air divider baffles, and all the control sensors are factory mounted as part of the "Factory installed" economizer option.
Unitary Products Group 17
OPTIONAL POWER EXHAUST/BAROMETRIC RELIEF
DAMPER AND RAIN HOOD
The instructions for the power exhaust/barometric relief damper and rain hood can be found in form 530.18-
44320-10. The exhaust fan, all supporting brackets, angles, and the wiring are factory installed as part of the power exhaust option.
All of the components, including the dampers, hardware, and mounting instructions are shipped in a single package external from the unit. The hood must be field assembled and installed.
Power exhaust is not available as a field installed accessory.
OPTIONAL ECONOMIZER AND POWER EXHAUST
DAMPER SET POINT ADJUSTMENTS AND INFORMA-
TION
Remove the economizer access panel from the unit.
Loosen but do not remove the two panel latches.
Locate the economizer control module, where the following adjustments will be made.
EXTREME CARE MUST BE EXCERCISED IN
TURNING ALL SETPOINT, MAXIMIUM, AND
MINIMUM DAMPER POSITIONING ADJUST-
MENT SCREWS TO PREVENT TWISTING
THEM OFF.
Check that the damper blades move smoothly without binding; carefully turn the Minimum Position Adjusting screw (found on the damper control module) fully clockwise and then set the thermostat indoor fan switch to the on position and then off, or energize and deenergize terminals "R" to "G".
MINIMUM POSITION ADJUSTMENT
With thermostat set to indoor fan on position, or terminals "R" to "G" energized, turn the Minimum Position
Adjusting screw (located on the damper control module) counterclockwise until the desired minimum damper position has been attained.
ENTHALPY SET POINT ADJUSTMENT
The enthalpy set point may now be set by selecting the desired setpoint shown in the Enthalpy Setpoint Adjustment Figure 9. Adjust as follows:
035-18940-000-B-1003
• For a single enthalpy operation carefully turn the set point adjusting screw (found on the damper control module) to the "A",
"B", "C" or "D" setting corresponding to the lettered curve of the Enthalpy Setpoint
Adjustment Figure 9.
• For a dual enthalpy operation, carefully turn the set point adjusting screw fully clockwise past the "D" setting.
POWER EXHAUST DAMPER SETPOINT (WITH OR WITH-
OUT POWER EXHAUST)
• With no power exhaust option, adjust the
Exhaust Air Adjustment Screw fully clockwise. This will allow 2nd stage cooling to operate.
• With power exhaust option, each building pressurization requirement will be different. The point at which the power exhaust comes on is determined by the economizer damper position (Percent Open). The
Exhaust Air Adjustment Screw should be set at the Percent Open of the economizer damper at which the power exhaust is needed. It can be set from 0 to 100% damper open.
INDOOR AIR QUALITY AQ
Indoor Air quality (indoor sensor input): Terminal AQ accepts a +2 to +10 Vdc signal with respect to the
(AQ1) terminal. When the signal is below it's setpoint, the actuator is allowed to modulate normally in accordance with the enthalpy and mixed air sensor inputs.
When the AQ signal exceeds it's setpoint setting and there is no call for free cooling, the actuator is proportionately modulated from the 2 to 10 Vdc signal, with 2
Vdc corresponding to full closed and 10 Vdc corresponding to full open. When there is no call for free cooling, the damper position is limited by the IAQ Max damper position setting. When the signal exceeds it's setpoint (Demand Control Ventilation Setpoint) setting and there is a call for free cooling, the actuator modulates from the minimum position to the full open position based on the highest call from either the mixed air sensor input or the AQ voltage input.
• Optional CO
2
Space Sensor Kit Part #
2AQ04700324
• Optional CO
2
Unit Sensor Kit Part #
2AQ04700424
Replace the economizer access panel.
18 Unitary Products Group
035-18940-000-B-1003
FIGURE 9 - ENTHALPY SETPOINT ADJUSTMENT
Unitary Products Group 19
Exhaust Air
Adjustment
Screw
Exhaust Air LED
Damper Min.
Position
Screw
N1
P1
N
P
EXH
Set
EXH
Indoor Air Quality
Max. Adjustment
Screw
T1 T
Min
Pos
IAQ
Max
Indoor Air Quality
LED
AQ1 AQ
IAQ
Indoor Air Quality
Min. Adjustment
Screw
SO+ SO
IAQ
Min
Free
Cool
Free Cooling LED
SR+ SR
B
A
C
D
Economizer Enthalpy
Set Point Adjustment
Screw
FIGURE 10 - HONEYWELL ECONOMIZER CONTROL W7212
TR
24
Vac
HOT
TR1
24
Vac
COM
+
1
3
EF
035-18940-000-B-1003
2
5
4
EF1
B
A
FRONT
D
FIGURE 11 - FOUR AND SIX POINT LOADS
C
A
B
F
E
FRONT
C
D
20 Unitary Products Group
035-18940-000-B-1003
TABLE 6: FOUR AND SIX POINT LOADS
Unit Size
180 Gas
240 Gas
300 Gas
180 Elec
240 Elec
300 Elec
Total
Shipping
Weight
2300
2500
3130
2100
2300
2890
A
539
538
615
492
295
487
Unit Size
180 Gas
240 Gas
300 Gas
180 Elec
240 Elec
300 Elec
Total
Shipping
Weight
2300
2500
3130
2100
2300
2890
A
351
334
418
320
307
415
B
367
350
438
335
322
471
4 Point Loads (lbs)
B C
563
563
671
514
517
619
612
715
962
558
658
646
6 Point Loads (lbs)
C D
392
426
533
358
392
528
416
502
628
380
462
551
D
586
684
882
536
630
508
E
399
481
603
364
442
492
F
375
407
510
343
375
433
FIGURE 12 - CENTER OF GRAVITY
Unitary Products Group 21
035-18940-000-B-1003
TABLE 7: PHYSICAL DATA
EVAPORATOR
BLOWER
EVAPORATOR COIL
CONDENSER FAN
(Two Per Unit)
CONDENSER
COIL
COMPRESSOR
(Qty. Per Unit)
FILTERS
CHARGE
OPERATING
WEIGHTS
(LBS.)
MODELS
CENTRIFUGAL BLOWER (Dia. x Wd.)
FAN MOTOR HP
ROWS DEEP
FINS PER INCH
FACE AREA (Sq. Ft.)
PROPELLER DIA. (In.) (Each)
FAN MOTOR HP (Each)
NOM. CFM TOTAL (Each)
ROWS DEEP
FINS PER INCH
FACE AREA (Sq. Ft.)
5 TON HERMETIC (RECIP.)
10 TON TANDEM (RECIP.)
12.5 TON TANDEM (SCROLL)
QUANTITY PER UNIT (12" X 24" X 2" or 4”)
QUANTITY PER UNIT (16" X 20" X 2" or 4”)
QUANTITY PER UNIT (16" X 25" X 2" or 4”)
QUANTITY PER UNIT (18" X 24" X 2" or 4”)
TOTAL FACE AREA (Sq. Ft.)
REFRIGERANT
22 (Lb./Oz.)
BASIC UNIT
SYSTEM No.1
SYSTEM No. 2
COOLING ONLY
GAS / ELECTRIC
N24
N32
ECONOMIZER
ECONOMIZER WITH
POWER EXHAUST
MOTORIZED DAMPER
ELECTRIC HEATER
18 KW
36 KW
54 KW
72 KW
ROOF CURB
BAROMETRIC DAMPER
ECONOMIZER / MOTORIZED
DAMPER RAIN HOOD
ECONOMIZER / POWER
EXHAUST RAIN HOOD
WOOD SKID
* NOTE: This compressor will be energized first.
DM180
15x15
5.0
3
15.5
17/5
8/5
1900
2100
2140
~
~
5
15
1
1*
~
~
6,000
2
13
36
175
200
245
150
25
30
35
40
185
45
55
DM240
~
~
~
2
8,000
2
20
43.3
18x15
7.5
3
13.5
20.5
30
1
18/0
18/0
2100
2300
4
4
~
20
2340
160
90
220
DM300
18x15
10
4
25
20/5
20/0
2730
2930
2970
~
~
~
24
7,200
3
15
43.3
~
~
2
12
185
220
22 Unitary Products Group
035-18940-000-B-1003
TABLE 8: DM ELECTRICAL DATA -WITHOUT POWERED CONVENIENCE OUTLET
MODEL
TONNAGE
15
20
25
VOLTAGE
COMPRESSORS
RLA
EACH
LRA
EACH
OD FAN
MOTORS
FLA EACH
ID
BLOWER
MOTOR
FLA
CONV
OUTLET
AMPS
HEATER OPTION
MODEL KW STAGES AMPS
MIN.
CIRCUIT
AMPACITY
(AMPS)
380
415
380
415
380
415
9.6
9.6
9.6
9.6
12.0
12.0
66
66
66
66
101
101
2.1
2.1
2.1
2.1
2.1
2.1
8.3
8.3
11.7
11.5
19
19
0.0
0.0
0.0
0.0
0.0
0.0
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
0.0
11.3
22.6
33.8
45.1
0.0
13.5
26.9
40.4
53.8
0.0
11.3
22.6
33.8
45.1
0.0
13.5
26.9
40.4
53.8
0.0
11.3
22.6
33.8
45.1
0.0
13.5
26.9
40.4
53.8
2
2
2
-
1
-
1
2
2
2
-
1
2
2
2
-
1
2
2
2
-
1
2
2
2
-
1
2
2
2
60
60
70
90
100
90
100
60
60
60
80
110
50
60
90
80
100
50
MAX.
FUSE/
BRKR 1
SIZE
(AMPS)
50
50
60
110
90
90
90
90
90
90
100
110
56.2
74.9
-
17.1
34.3
51.4
34.3
51.4
68.6
-
18.7
37.4
68.6
-
18.7
37.4
56.2
74.9
18.7
37.4
56.2
74.9
-
17.1
-
17.1
34.3
51.4
68.6
-
84.6
89.2
76.0
76.0
76.0
87.9
57.5
78.8
100.3
57.0
57.0
61.2
109.4
76.0
76.0
76.0
94.0
98.6
43.7
57.2
80.6
85.2
57.2
57.2
43.7
43.7
53.3
74.6
96.0
43.7
Note 1: HACR Type per NEC.
Unitary Products Group 23
035-18940-000-B-1003
TABLE 9: DM ELECTRICAL DATA -WITH POWERED CONVENIENCE OUTLET
MODEL
TONNAGE
15
20
25
VOLTAGE
COMPRESSORS
RLA
EACH
LRA
EACH
OD FAN
MOTORS
FLA EACH
ID
BLOWER
MOTOR
FLA
CONV
OUTLET
AMPS
HEATER OPTION
MODEL KW STAGES AMPS
MIN.
CIRCUIT
AMPACITY
(AMPS)
380
415
380
415
380
415
9.6
9.6
9.6
9.6
12.0
12.0
66
66
66
66
101
101
2.1
2.1
2.1
2.1
2.1
2.1
8.3
8.3
11.7
11.5
19
19
6.3
6.3
6.3
6.3
6.3
6.3
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
0.0
11.3
22.6
33.8
45.1
0.0
13.5
26.9
40.4
53.8
0.0
11.3
22.6
33.8
45.1
0.0
13.5
26.9
40.4
53.8
0.0
11.3
22.6
33.8
45.1
0.0
13.5
26.9
40.4
53.8
-
1
2
2
2
-
1
2
2
2
-
1
2
2
2
-
1
2
2
2
-
1
2
2
2
-
1
2
2
2
100
100
110
110
100
100
125
100
100
100
100
100
110
70
70
70
70
70
70
90
50
70
90
100
MAX.
FUSE/
BRKR
1
SIZE
(AMPS)
50
50
70
90
110
50
68.6
-
18.7
37.4
56.2
74.9
-
17.1
34.3
51.4
18.7
37.4
56.2
74.9
34.3
51.4
68.6
-
56.2
74.9
-
17.1
68.6
-
18.7
37.4
-
17.1
34.3
51.4
117.3
82.3
82.3
82.3
101.9
106.5
82.3
82.3
82.3
95.8
63.3
69.0
92.5
97.1
88.5
93.1
63.5
63.5
65.4
86.7
108.2
63.3
50.0
50.0
61.2
82.4
103.9
50.0
50.0
65.0
Note 1: HACR Type per NEC.
24 Unitary Products Group
035-18940-000-B-1003
COMPARTMENT
(Auxiliary)
DOT PLUG
(For pressure
Drop Reading)
ELECTRIC
BLOWER
ACCESS FIELD-SUPPLIED
LOCATION
FIXED OUTDOOR INTAKE AIR AND
(See detail "Y")
COMPRESSOR
(See detail "X")
OPTIONAL
COIL GUARD
48-5/8" (15 TON)
52-5/8" (20, 25 TON)
RETURN AIR
SUPPLY AIR
CONDENSER AIR
OUTDOOR AIR
(Economizer)
OUTLET
HOODS
COMBUSTION
HOOD
(C)
GAS SUPPLY
ENTRY
33"
11-1/8"
2-3/4" 21-1/2"
CONDENSER
COILS
FRONT
VIEW
UNIT BASE WITH RAILS
Shown separately to illustrate
Bottom Duct openings, Power locations
"
"
(15 TON) TON)
6-3/8"
CONTROL BOX
ACCESS 35"
1/4
"
GAS SUPPLY
ENTRY
7-1/8"
5"
21"
9-3/4"
5-7/8"
46-5/8"
92"
11-1/2"
BOTTOM SUPPLY
AND RETURN
AIR OPENINGS
(See Note)
8-1/8"
9-3/4"
CONTROL WIRING
ENTRY
POWER WIRING
ENTRY
3-3/4"
(B)
POWER WIRING
ENTRY
(A)
ENTRY
All dimensions are in inches. They are subject to change without notice. Certified dimensions will be provided upon request.
UTILITIES ENTRY DATA
HOLE
A
B
C
D
OPENING
SIZE
(DIA.)
1-1/8" KO
3/4" NPS (Fem.)
3-5/8" KO
3" NPS (Fem.)
2-3/8" KO
USED FOR
Control
Wiring
Power
Wiring
Front
Bottom
Front
Bottom
Gas Piping (Front)
1-11/16" Hole Gas Piping (Bottom)*
*Opening in the bottom of the unit can be located by the slice in the insulation.
dimensions of the curb for the proper size of the supply and return air duct connections.
46-5/8"
9-1/4"
12-1/2"
DUCT COVERS - Units are shipped with the bottom duct openings covered. An accessory flange kit is available for connecting side ducts.
For bottom duct applications:
1. Remove the side panels from the supply and return air compartments to gain access to the bottom supply and return air duct covers.
2. Remove and discard the bottom duct covers. (Duct openings are closed with sheet metal covers except when the unit includes a power exhaust option. The covering consists of a heavy black paper composition.)
3. Replace the side supply and return air compartment panels.
For side duct applications:
1. Replace the side panels on the supply and return air compartments with the accessory flange kit panels.
2. Connect duct work to the duct flanges on the rear of the unit.
CONDENSER SECTION
GAUGE LINE
ACCESS
EVAPORATOR
SECTION
S U P P L Y A I R
C O M P A R T M E N T
P O W E R
R A I N
( o n
E X H A U S T
H O O D
R e t u r n A i r C o m p a r t m e n t )
E C O N O M I Z E R
M O T O R I Z E D
D A M P E R
R A I N H O O D
( o n O u t d o o r A i r C o m p a r t m e n t )
E C O N O M I Z E R
A N D P O W E R
/
M O T O R I Z E D
E X H A U S T R A I N
D A M P E R
H O O D S
40-3/8"
DOT PLUG
(For pressure drop reading)
FILTER
ACCESS
SUPPLY
AIR
RETURN
AIR
5-1/2"
COMPRESSOR
ACCESS
OUTDOOR
AIR
1" NPT FEMALE
COND. DRAIN
CONNECTION
SUPPLY AIR
ACCESS 40-1/2"
18-5/8"
REAR
VIEW
RETURN AIR
ACCESS
5 1/8"
27-3/4"
OUTDOOR AIR
COMPARTMENT
ACCESS
28-5/8" (15 Tons)
39-5/8" (20, 25 Tons)
DETAIL “X”
(ACCESSORY SIDE SUPPLY AND RETURN AIR OPENINGS)
FIGURE 13 - DIMENSIONS & CLEARANCES 15, 20 & 25 TON
R E A R V I E W
6 6 - 1 / 2 "
3 6 "
3 4 - 1 / 4 "
1 6 - 1 / 8 "
5 "
3 6 - 1 / 4 "
2 "
D E T A I L " Y "
U N I T W I T H R A I N H O O D S
F I X E D
O U T D O O R A I R
I N T A K E
( l o c a t e d o n
R e t u r n A i r
C o m p a r t m e n t )
9 2 "
L H V I E W
1 " C O N D E N S T A T E
D R A I N
( M u s t b e t r a p p e d )
CLEARANCES
Front 36"
Back
Left Side (Filter Access)
Right Side (Cond. Coil)
Below Unit
Above Unit
1
2
24" (Less Economizer)
49" (With Economizer)
24" (Less Economizer)
36"
3
(With Economizer)
36"
0"
2
72" With 36" Maximum
Horizontal Overhang
(For Condenser Air
Discharge Outlet)
1
Units (applicable in U.S.A. only) may be installed on combustible floors
2 made from wood or class A, B or C roof covering material.
Units must be installed outdoors. Overhanging structures or shrubs should
3 not obstruct condenser air discharge outlet.
If economizer is factory installed, the assembled hood kit must be removed prior to final installation. This hood is 54" long.
NOTE:
A 1" clearance must be provided between any combustible material and the supply air ductwork for a distance of 3 feet from the unit.
The products of combustion must not be allowed to accumulate within a confined space and recirculate.
Locate unit so that the vent air outlet hoods are at least:
Three (3) feet above any forced air inlet located within 10 horizontal feet (excluding those integral to the unit).
Four (4) feet below, 4 horizontal feet from, or 1 foot above any door or gravity air inlet into the building.
Four (4) feet from electric meters, gas meters, regulators and relief equipment.
Unitary Products Group 25
035-18940-000-B-1003
TABLE 10: SUPPLY AIR BLOWER PERFORMANCE (15 TON) - COOLING ONLY
180 MBH - BOTTOM DUCT CONNECTIONS
BLOWER
SPEED,
(RPM)
MOTOR
PULLEY
(TURNS
OPEN)* ESP
(Pa)
2.10 m 3 /s
Output
(kW)
Input
(kW)
STANDARD DRIVE (m 3 /s)
845 6.0
173
885
925
960
1000
5.0
4.0
3.0
2.0
1040 1.0
HIGH SPEED DRIVE (m 3 /s)
369
208
245
281
323
1030
1070
1115
1155
1200
1240
6.0
5.0
4.0
3.0
2.0
1.0
357
405
461
514
577
636
1.8
1.9
2.0
2.1
2.3
2.4
2.4
2.5
2.7
2.9
3.1
3.3
2.6
2.7
2.9
2.2
2.3
2.4
2.8
3.0
3.2
3.4
3.7
3.9
ESP
(Pa)
2.45 m 3 /s
Output
(kW)
Input
(kW)
316
362
416
468
529
587
138
172
208
242
283
327
2.8
3.0
3.2
3.4
3.6
3.8
2.6
2.7
2.9
2.2
2.3
2.4
3.4
3.6
3.8
4.0
4.3
4.5
3.1
3.2
3.4
2.6
2.8
2.9
253
298
351
401
461
-
182
222
264
83
115
149
ESP
(Pa)
AIRFLOW
2.80 m 3 /s
Output
(kW)
Input
(kW)
3.3
3.5
3.7
3.9
4.1
-
3.0
3.2
3.3
2.6
2.7
2.9
3.9
4.2
4.4
4.7
5.0
-
3.6
3.8
4.0
3.1
3.3
3.4
ESP
(Pa)
3.10 m 3 /s
Output
(kW)
Input
(kW)
-
-
183
226
278
-
114
152
193
18
49
82
3.7
3.9
4.2
-
-
-
3.4
3.6
3.8
3.0
3.1
3.3
4.1
4.3
4.5
3.5
3.7
3.9
4.5
4.7
5.0
-
-
-
ESP
(Pa)
3.40 m 3 /s
Output
(kW)
Input
(kW)
-
-
97
-
-
-
30
67
107
-
-
-
-
-
4.2
-
-
-
3.8
4.0
4.2
-
-
-
4.6
4.8
5.1
-
-
-
-
-
5.0
-
-
-
BLOWER
SPEED,
(RPM)
MOTOR
PULLEY
(TURNS
OPEN)* ESP
(iwg)
4450 CFM
Output
(bhp)
Input
(kW)
STANDARD DRIVE (CFM)
845
885
6.0
5.0
0.7
0.8
2.4
2.6
2.2
2.3
925
960
1000
1040
4.0
3.0
2.0
1.0
1.0
1.1
1.3
1.5
2.7
2.9
3.0
3.2
2.4
2.6
2.7
2.9
HIGH SPEED DRIVE (CFM)
1030 6.0
1.4
1070
1115
5.0
4.0
1.6
1.9
1155
1200
1240
3.0
2.0
1.0
2.1
2.3
2.6
3.2
3.4
3.6
3.9
4.1
4.4
3.4
3.7
3.9
2.8
3.0
3.2
ESP
(iwg)
0.6
0.7
0.8
1.0
1.1
1.3
1.9
2.1
2.4
1.3
1.5
1.7
5190 CFM
Output
(bhp)
2.9
3.1
3.3
3.4
3.6
3.8
3.8
4.0
4.3
4.5
4.8
5.1
Input
(kW)
2.6
2.8
2.9
3.1
3.2
3.4
3.4
3.6
3.8
4.0
4.3
4.5
ESP
(iwg)
0.3
0.5
0.6
0.7
0.9
1.1
1.0
1.2
1.4
1.6
1.8
-
AIRFLOW
5930 CFM
Output
(bhp)
3.5
3.7
3.8
4.0
4.2
4.5
4.4
4.7
5.0
5.2
5.5
-
Input
(kW)
3.1
3.3
3.4
3.6
3.8
4.0
3.9
4.2
4.4
4.7
5.0
-
ESP
(iwg)
0.1
0.2
0.3
0.5
0.6
0.8
0.7
0.9
1.1
-
-
-
6565 CFM
Output
(bhp)
4.0
4.2
4.4
4.6
4.8
5.1
5.0
5.3
5.6
-
-
-
Input
(kW)
3.5
3.7
3.9
4.1
4.3
4.5
4.5
4.7
5.0
-
-
-
ESP
(iwg)
-
-
-
0.1
0.3
0.4
0.4
-
-
-
-
-
7200 CFM
Output
(bhp)
-
-
-
5.2
5.4
5.7
5.6
-
-
-
-
-
NOTES: 1.Blower performance includes fixed outdoor air, 2” T/A filters, a dry evaporator coil and no electric heat.
2.Refer to Table 15 for additional static resistances.
ESP = External Static Pressure available for the supply and return air duct system. All internal unit resistances have been deducted from the total static pressure of the blower.
* Do NOT close the pulley below 1 turn open.
** Factory setting.
Input
(kW)
-
4.6
-
-
4.8
5.1
-
-
-
5.0
-
-
26 Unitary Products Group
035-18940-000-B-1003
TABLE 11: SUPPLY AIR BLOWER PERFORMANCE (20 TON) - COOLING ONLY
240 MBH - BOTTOM DUCT CONNECTIONS
BLOWER
SPEED,
(RPM)
STANDARD DRIVE (m 3 /s)
765
795
6.0
5.0
137
176
820
850
875
905
4.0
3.0
2.0
1.0
HIGH SPEED DRIVE (m
3
/s)
895 6.0
312
209
250
284
327
930
970
1005
1045
1080
MOTOR
PULLEY
(TURNS
OPEN)*
5.0
4.0
3.0
2.0
1.0
ESP
(Pa)
2.80 m 3 /s
Output
(kW)
Input
(kW)
362
421
473
535
590
2.9
3.0
3.1
3.3
3.4
3.6
3.5
3.7
4.0
4.2
4.4
4.6
3.3
3.4
3.6
3.8
3.9
4.1
4.8
5.0
5.3
4.0
4.3
4.5
ESP
(Pa)
3.30 m 3 /s
Output
(kW)
Input
(kW)
268
318
377
429
491
546
93
132
165
206
240
283
4.5
4.8
5.0
3.7
4.0
4.2
2.9
3.1
3.2
3.4
3.6
3.8
5.1
5.5
5.8
4.3
4.5
4.9
3.3
3.5
3.7
3.9
4.1
4.3
359
420
475
198
248
306
23
62
95
136
170
212
ESP
(Pa)
AIRFLOW
3.80 m 3 /s
Output
(kW)
Input
(kW)
5.1
5.4
5.7
4.2
4.5
4.8
3.2
3.4
3.6
3.8
4.0
4.3
5.8
6.2
6.5
4.8
5.1
5.5
3.7
3.9
4.1
4.4
4.6
4.9
ESP
(Pa)
4.10 m 3 /s
Output
(kW)
Input
(kW)
143
193
252
304
365
420
40
81
-
-
115
157
5.6
5.9
6.2
4.6
4.9
5.2
4.0
4.2
-
-
4.4
4.7
4.5
4.8
-
-
5.0
5.3
6.4
6.8
7.1
5.2
5.6
6.0
ESP
(Pa)
4.40 m 3 /s
Output
(kW)
Input
(kW)
79
129
187
240
-
-
-
16
-
-
51
93
6.1
-
-
5.1
5.4
5.8
-
4.7
-
-
4.9
5.2
-
5.3
-
-
5.6
5.9
7.0
-
-
5.8
6.2
6.6
BLOWER
SPEED,
(RPM)
MOTOR
PULLEY
(TURNS
OPEN)* ESP
(iwg)
5930 CFM
Output
(bhp)
Input
(kW)
STANDARD DRIVE (CFM)
765 6.0
0.6
795
820
5.0
4.0
0.7
0.8
3.8
4.0
4.2
3.3
3.4
3.6
4.4
4.6
4.8
3.8
3.9
4.1
850
875
3.0
2.0
1.0
1.1
905 1.0
HIGH SPEED DRIVE (CFM)
1.3
895
930
970
1005
1045
1080
6.0
5.0
4.0
3.0
2.0
1.0
2.1
2.4
1.3
1.5
1.7
1.9
4.7
5.0
5.3
5.6
5.9
6.2
4.0
4.3
4.5
4.8
5.0
5.3
ESP
(iwg)
0.4
0.5
0.7
0.8
1.0
1.1
1.1
1.3
1.5
1.7
2.0
2.2
6990 CFM
Output
(bhp)
3.9
4.1
4.4
4.6
4.8
5.1
5.0
5.3
5.7
6.0
6.4
6.8
Input
(kW)
3.3
3.5
3.7
3.9
4.1
4.3
4.3
4.5
4.9
5.1
5.5
5.8
ESP
(iwg)
0.1
0.2
0.4
0.5
0.7
0.9
0.8
1.0
1.2
1.4
1.7
1.9
AIRFLOW
8050 CFM
Output
(bhp)
4.3
4.6
4.8
5.1
5.4
5.7
5.6
6.0
6.4
6.8
7.3
7.7
Input
(kW)
3.7
3.9
4.1
4.4
4.6
4.9
4.8
5.1
5.5
5.8
6.2
6.5
ESP
(iwg)
-
-
0.2
0.3
0.5
0.6
0.6
0.8
1.0
1.2
1.5
1.7
8685 CFM
Output
(bhp)
-
-
5.3
5.6
5.9
6.3
6.1
6.6
7.0
7.4
7.9
8.4
Input
(kW)
-
-
4.5
4.8
5.0
5.3
5.2
5.6
6.0
6.4
6.8
7.1
ESP
(iwg)
-
-
-
0.1
0.2
0.4
0.3
0.5
0.8
1.0
-
-
9320 CFM
Output
(bhp)
-
-
-
6.2
6.6
6.9
6.8
7.2
7.8
8.2
-
-
NOTES: 1.Blower performance includes fixed outdoor air, 2” T/A filters, a dry evaporator coil and no electric heat.
2.Refer to Table 15 for additional static resistances.
ESP = External Static Pressure available for the supply and return air duct system. All internal unit resistances have been deducted from the total static pressure of the blower.
* Do NOT close the pulley below 1 turn open.
** Factory setting.
Input
(kW)
5.3
5.6
5.9
-
-
-
5.8
6.2
6.6
7.0
-
-
Unitary Products Group 27
035-18940-000-B-1003
TABLE 12: SUPPLY AIR BLOWER PERFORMANCE (15 TON) - GAS HEAT
180 MBH - BOTTOM DUCT CONNECTIONS
BLOWER
SPEED,
(RPM)
MOTOR
PULLEY
(TURNS
OPEN)* ESP
(Pa)
2.10 m 3 /s
Output
(kW)
Input
(kW)
STANDARD DRIVE (m 3 /s)
845 6.0
206
885
925
960
1000
5.0
4.0
3.0
2.0
1040 1.0
HIGH SPEED DRIVE (m 3 /s)
387
242
278
311
349
1030
1070
1115
1155
1200
1240
6.0
5.0
4.0
3.0
2.0
1.0
378
417
461
502
548
590
1.8
1.9
2.0
2.1
2.2
2.3
2.3
2.4
2.6
2.8
3.0
3.2
2.5
2.6
2.8
2.2
2.3
2.4
2.7
2.9
3.1
3.3
3.6
3.8
ESP
(Pa)
2.45 m 3 /s
Output
(kW)
Input
(kW)
321
361
407
448
495
538
146
183
220
253
292
331
2.7
2.9
3.1
3.3
3.6
3.8
2.4
2.6
2.7
2.0
2.2
2.3
3.2
3.4
3.7
4.0
4.3
4.6
2.9
3.1
3.3
2.5
2.6
2.7
258
299
345
387
435
-
189
228
268
80
117
155
ESP
(Pa)
AIRFLOW
2.80 m 3 /s
Output
(kW)
Input
(kW)
3.2
3.4
3.7
3.9
4.2
-
2.8
3.0
3.2
2.4
2.5
2.7
3.8
4.1
4.4
4.7
5.0
-
3.4
3.6
3.9
2.8
3.0
3.2
ESP
(Pa)
3.10 m 3 /s
Output
(kW)
Input
(kW)
-
-
199
240
286
-
128
168
209
18
56
94
3.6
3.9
4.2
-
-
-
3.2
3.5
3.7
2.7
2.9
3.1
3.9
4.2
4.4
3.2
3.4
3.7
4.4
4.7
5.0
-
-
-
ESP
(Pa)
3.40 m 3 /s
Output
(kW)
Input
(kW)
-
-
-
-
134
-
63
103
144
-
-
28
-
-
4.2
-
-
-
3.7
4.0
4.3
-
-
3.5
4.5
4.8
5.1
-
-
4.2
-
-
5.0
-
-
-
BLOWER
SPEED,
(RPM)
MOTOR
PULLEY
(TURNS
OPEN)* ESP
(iwg)
4450 CFM
Output
(bhp)
Input
(kW)
STANDARD DRIVE (CFM)
845
885
6.0
5.0
0.8
1.0
2.5
2.6
2.2
2.3
925
960
1000
1040
4.0
3.0
2.0
1.0
1.1
1.2
1.4
1.6
2.7
2.8
2.9
3.1
2.4
2.5
2.6
2.8
HIGH SPEED DRIVE (CFM)
1030 6.0
1.5
1070
1115
5.0
4.0
1.7
1.9
1155
1200
1240
3.0
2.0
1.0
2.0
2.2
2.4
3.1
3.3
3.5
3.7
4.0
4.3
3.3
3.6
3.8
2.7
2.9
3.1
ESP
(iwg)
0.6
0.7
0.9
1.0
1.2
1.3
1.8
2.0
2.2
1.3
1.4
1.6
5190 CFM
Output
(bhp)
2.7
2.9
3.1
3.2
3.4
3.7
3.6
3.8
4.1
4.4
4.8
5.1
Input
(kW)
2.5
2.6
2.7
2.9
3.1
3.3
3.2
3.4
3.7
4.0
4.3
4.6
ESP
(iwg)
0.3
0.5
0.6
0.8
0.9
1.1
1.0
1.2
1.4
1.6
1.7
-
AIRFLOW
5930 CFM
Output
(bhp)
3.2
3.4
3.6
3.8
4.0
4.3
4.3
4.5
4.9
5.2
5.6
-
Input
(kW)
2.8
3.0
3.2
3.4
3.6
3.9
3.8
4.1
4.4
4.7
5.0
-
ESP
(iwg)
0.1
0.2
0.4
0.5
0.7
0.8
0.8
1.0
1.2
-
-
-
6565 CFM
Output
(bhp)
3.6
3.8
4.1
4.3
4.7
5.0
4.9
5.2
5.6
-
-
-
Input
(kW)
3.2
3.4
3.7
3.9
4.2
4.4
4.4
4.7
5.0
-
-
-
ESP
(iwg)
-
-
0.1
0.3
0.4
0.6
0.5
-
-
-
-
-
7200 CFM
Output
(bhp)
-
-
4.7
5.0
5.3
5.7
5.6
-
-
-
-
-
NOTES: 1.Blower performance includes a gas-fired heat exchanger, fixed outdoor air, two-inch T/A filters and a dry evaporator coil.
2.Refer to the additional Static Resistances table.
ESP = External Static Pressure available for the supply and return air duct system. All internal unit resistances have been deducted from the total static pressure of the blower.
* Do NOT close the pulley below 1 turn open.
** Factory setting.
Input
(kW)
4.2
4.5
-
-
4.8
5.1
-
-
-
5.0
-
-
28 Unitary Products Group
035-18940-000-B-1003
TABLE 13: SUPPLY AIR BLOWER PERFORMANCE (20 TON) - GAS HEAT
240 MBH - BOTTOM DUCT CONNECTIONS
BLOWER
SPEED,
(RPM)
MOTOR
PULLEY
(TURNS
OPEN)* ESP
(Pa)
STANDARD DRIVE (m 3 /s)
765 6.0
202
795
820
850
875
905
5.0
4.0
3.0
2.0
1.0
238
268
305
336
347
HIGH SPEED DRIVE (m 3 /s)
895 6.0
361
925
955
990
1020
1050
1080
5.0
4.0
3.0
2.0
1.0
0.0
400
439
486
527
569
612
2.80 m 3 /s
Output
(kW)
Input
(kW)
2.1
2.3
2.4
2.5
2.7
2.8
2.8
2.9
3.1
3.3
3.5
3.7
3.9
2.4
2.6
2.7
2.9
3.0
3.2
3.8
4.0
4.2
4.4
3.2
3.4
3.6
ESP
(Pa)
3.30 m 3 /s
Output
(kW)
Input
(kW)
249
290
332
381
425
469
514
80
117
150
189
222
262
4.1
4.3
4.6
4.8
3.5
3.7
3.9
2.7
2.9
3.0
3.2
3.4
3.6
4.7
5.0
5.2
5.5
4.0
4.2
4.4
3.1
3.3
3.4
3.7
3.8
4.1
114
157
201
254
299
346
393
-
-
-
50
85
128
ESP
(Pa)
AIRFLOW
3.80 m 3 /s
Output
(kW)
Input
(kW)
5.0
5.2
5.5
5.8
4.3
4.5
4.7
-
-
3.9
4.1
4.3
5.7
6.0
6.3
6.6
4.9
5.1
5.4
-
-
-
4.5
4.7
5.0
ESP
(Pa)
4.10 m 3 /s
Output
(kW)
Input
(kW)
22
66
112
166
213
261
310
-
-
-
-
-
37
5.5
5.8
6.1
6.4
4.7
5.0
5.2
-
-
-
-
-
4.8
-
-
-
-
-
5.5
6.3
6.7
7.0
7.3
5.4
5.7
6.0
-
-
-
-
-
-
ESP
(Pa)
4.40 m 3 /s
Output
(kW)
Input
(kW)
-
-
70
119
-
-
15
6.1
6.4
-
-
-
-
5.8
-
-
-
-
-
-
-
-
-
-
-
-
7.0
7.3
-
-
-
-
6.6
BLOWER
SPEED,
(RPM)
MOTOR
PULLEY
(TURNS
OPEN)* ESP
(iwg)
STANDARD DRIVE (CFM)
765 6.0
0.8
5930 CFM
Output
(bhp)
2.8
Input
(kW)
2.4
795
820
850
5.0
4.0
3.0
1.0
1.1
1.2
3.0
3.2
3.4
2.6
2.7
2.9
3.6
3.8
3.0
3.2
875
905
2.0
1.0
1.3
1.5
HIGH SPEED DRIVE (CFM)
895 6.0
1.5
925
955
990
1020
1050
1080
5.0
4.0
3.0
2.0
1.0
0.0
2.3
2.5
1.6
1.8
2.0
2.1
3.7
3.9
4.2
4.4
4.7
4.9
5.2
3.2
3.4
3.6
3.8
4.0
4.2
4.4
ESP
(iwg)
0.3
0.5
0.6
0.8
0.9
1.1
1.0
1.2
1.3
1.5
1.7
1.9
2.1
6990 CFM
Output
(bhp)
3.6
3.8
4.0
4.3
4.5
4.8
4.7
4.9
5.2
5.5
5.8
6.1
6.4
Input
(kW)
3.1
3.3
3.4
3.7
3.8
4.1
4.0
4.2
4.4
4.7
5.0
5.2
5.5
ESP
(iwg)
-
-
-
0.2
0.3
0.5
0.5
0.6
0.8
1.0
1.2
1.4
1.6
AIRFLOW
8050 CFM
Output
(bhp)
-
-
-
5.3
5.5
5.8
5.7
6.0
6.3
6.7
7.0
7.4
7.7
Input
(kW)
-
-
-
4.5
4.7
5.0
4.9
5.1
5.4
5.7
6.0
6.3
6.6
ESP
(iwg)
-
-
-
-
-
0.1
0.1
0.3
0.4
0.7
0.9
1.0
1.2
8685 CFM
Output
(bhp)
-
-
-
-
-
6.5
6.3
6.7
7.0
7.4
7.8
8.2
8.5
Input
(kW)
-
-
-
-
-
5.5
5.4
5.7
6.0
6.3
6.7
7.0
7.3
ESP
(iwg)
-
-
-
-
-
-
-
-
0.1
0.3
0.5
-
9320 CFM
Output
(bhp)
-
-
-
-
-
-
-
-
7.8
8.2
8.6
-
NOTES: 1.Blower performance includes a gas-fired heat exchanger, fixed outdoor air, two-inch T/A filters and a dry evaporator coil.
2.Refer to the additional Static Resistances table.
ESP = External Static Pressure available for the supply and return air duct system. All internal unit resistances have been deducted from the total static pressure of the blower.
* Do NOT close the pulley below 1 turn open.
** Factory setting.
Input
(kW)
6.6
7.0
7.3
-
-
-
-
-
-
-
-
-
Unitary Products Group 29
035-18940-000-B-1003
TABLE 14: SUPPLY AIR BLOWER PERFORMANCE (25 TON) - COOLING APPLICATIONS
300 MBH - BOTTOM DUCT CONNECTIONS
DM300 UNIT - DOWNFLOW DUCT CONNECTIONS (CFM)
7500 CFM
BLOWER
SPEED (rpm)
PULLEY
TURNS OPEN
ESP (iwg) OUTPUT (bhp) INPUT (kW) ESP (iwg)
8750 CFM
OUTPUT (bhp)
945 6.0
1.2
5.6
4.6
0.8
7.0
INPUT
(kW)
5.7
ESP (iwg) OUTPUT (bhp)
0.3
10000 CFM
8.4
975
1005
1040
1070
5.0
4.0
3.0
2.0
1.4
1.6
1.8
2.0
5.9
6.2
6.6
6.9
1100
1130
1.0
0.0
2.1
2.3
7.3
7.6
DM300 UNIT - DOWNFLOW DUCT CONNECTIONS (m 3 /s)
4.9
5.1
5.4
5.7
6.0
6.2
1.0
1.2
1.4
1.6
1.8
2.0
7.3
7.7
8.1
8.5
8.9
9.3
6.0
6.3
6.7
7.0
7.3
7.6
0.5
0.7
0.9
1.1
1.3
1.5
8.8
9.2
9.7
10.2
10.6
11.0
3.53 m 3 4.72 m 3 /Sec.
BLOWER
SPEED (rpm)
PULLEY
TURNS OPEN
ESP (Pa) OUTPUT (bhp) INPUT (kW) ESP (Pa) OUTPUT (bhp) ESP (Pa) OUTPUT(bhp)
945
975
1005
1040
6.0
5.0
4.0
3.0
303
347
391
443
5.6
5.9
6.2
6.6
4.6
4.9
5.1
5.4
198
244
291
347
7.0
7.3
7.7
8.1
1070
1100
2.0
1.0
489
536
6.9
7.3
1130 0.0
583 7.6
6.2
495
DM300 UNIT - DOWNFLOW DUCT CONNECTIONS - GAS HEAT MODELS (CFM)
7500 CFM
5.7
6.0
396
445
BLOWER
SPEED (rpm)
PULLEY
TURNS OPEN
ESP (iwg) OUTPUT (bhp) INPUT (kW) ESP (iwg)
8.5
8.9
9.3
8750 CFM
OUTPUT (bhp)
INPUT
(kW)
5.7
6.0
6.3
6.7
7.0
7.3
7.6
71
120
169
228
280
332
385
8.4
8.8
9.2
9.7
10.2
10.6
11.0
10000 CFM
ESP (iwg) OUTPUT (bhp)
945
975
1005
1040
6.0
5.0
4.0
3.0
1.0
1.2
1.4
1.6
5.6
5.9
6.2
6.6
4.6
4.9
5.1
5.4
0.3
0.5
0.7
0.9
7.0
7.3
7.7
8.1
1070
1100
2.0
1.0
1.8
2.0
6.9
7.3
1130 0.0
2.2
7.6
6.2
1.5
DM300 UNIT - DOWNFLOW DUCT CONNECTIONS - GAS HEAT MODELS (m 3 /s)
3.53 m 3 /sec.
5.7
6.0
1.1
1.3
BLOWER
SPEED (rpm)
PULLEY
TURNS OPEN
ESP (Pa) OUTPUT (bhp) INPUT (kW) ESP (Pa)
8.5
8.9
9.3
4.13 m 3 /sec.
OUTPUT (bhp)
INPUT
(kW)
5.7
6.0
6.3
6.7
7.0
7.3
7.6
0.4
0.6
0.8
-
0.2
-
-
-
9.7
-
-
10.2
10.6
11.0
4.72 m 3 /sec.
ESP (Pa) OUTPUT (bhp)
945
975
1005
1040
1070
1100
1130
3.0
2.0
1.0
0.0
6.0
5.0
4.0
258
301
345
398
444
490
537
6.6
6.9
7.3
7.6
5.6
5.9
6.2
5.4
5.7
6.0
6.2
4.6
4.9
5.1
87
133
180
236
285
334
384
8.1
8.5
8.9
9.3
7.0
7.3
7.7
INPUT
(kW)
5.7
6.0
6.3
6.7
7.0
7.3
7.6
43
94
146
199
-
-
-
9.7
10.2
10.6
11.0
-
-
-
NOTES: 1.Blower performance includes a gas-fired heat exchanger, fixed outdoor air, two-inch T/A filters and a dry evaporator coil.
2.Refer to the additional Static Resistances table.
ESP = External Static Pressure available for the supply and return air duct system. All internal unit resistances have been deducted from the total static pressure of the blower.
* Do NOT close the pulley below 1 turn open.
** Factory setting.
INPUT
(kW)
-
8.0
8.3
-
-
8.7
9.0
INPUT
(kW)
6.9
7.2
7.6
8.0
8.3
8.7
9.0
INPUT
(kW)
6.9
7.2
7.6
8.0
8.3
8.7
9.0
INPUT
(kW)
-
-
-
8.0
8.3
8.7
9.0
30 Unitary Products Group
035-18940-000-B-1003
TABLE 15: STATIC RESISTANCES 1
DESCRIPTION
RESISTANCE, Pa/IWG m 3 /s/ CFM
MODEL 180 MODEL 240 MODEL 300
2.1/4500 2.8/6000 3.4/7200 2.8/6000 3.8/8000 4.4/9400 3.78/8000 4.25/9000 4.72/10000
24.8/0.1
24.8/0.1
24.8/0.1
24.8/0.1
24.8/0.1
24.8/0.1
24.8/0.1
24.8/0.1
24.8/0.1
24.8/0.1
24.8/0.1
24.8/0.1
25/0.1
25/0.1
25/0.1
25/0.1
25/0.1
25/0.1
WET COIL
GAS HEAT
ELECTRIC HEAT OPTIONS
18 KW 24.8/0.1
24.8/0.1
24.8/0.1
24.8/0.1
24.8/0.1
24.8/0.1
36 KW 24.8/0.1
50.0/0.2
74.4/0.3
24.8/0.1
50.0/0.2
74.4/0.3
54 KW 50.0/0.2
74.4/0.3
99.2/0.4
50.0/0.2
74.4/0.3
99.2/0.4
72 KW 50.0/0.2
99.2/0.4
149.0/0.6
50.0/0.2
99.2/0.4
149.0/0.6
ECONOMIZER OPTION
HORIZONTAL DUCT CONNECTIONS
24.8/0.1
24.8/0.1
24.8/0.1
24.8/0.1
24.8/0.1
24.8/0.1
50.0/0.2
74.4/0.3
124.0/0.5
50.0/0.2
74.4/0.3
124.0/0.5
25/0.1
25/0.1
50/0.2
50/0.2
25/0.1
50/0.2
25/0.1
50/0.2
75/0.3
100/0.4
25/0.1
75/0.3
25/0.1
75/0.3
100/0.4
150/0.6
25/0.1
125/0.5
1.
Deduct these resistance values from the available external static pressures shown in the respective Blower Performance Table except for Horizontal
Duct Connections.
Add these values due to less airflow resistance.
TABLE 16: POWER EXHAUST PERFORMANCE
MOTOR
SPEED
HIGH*
MEDIUM
LOW
CFM
5250
4900
4400
0.2
KW
0.83
0.77
0.72
CFM
4500
STATIC RESISTANCE OF RETURN DUCTWORK, IWG
0.3
0.4
0.5
KW
0.85
CFM
4200
KW
0.88
CFM
3750
3900
3700
0.79
0.74
3500
3000
0.82
0.78
2900
-
KW
0.93
0.85
-
CFM
3000
-
-
0.6
KW
0.99
-
-
* Factory Setting
Power Exhaust motor is a 3/4 HP, PSC type with sleeve bearings, a 48 frame and inherent protection.
TABLE 17: BLOWER MOTOR AND DRIVE DATA
MODEL
SIZE
180
240
DRIVE
BLOWER
RANGE
(RPM)
MOTOR
1 kW/HP FRAME
Standard 845/1040
High
Speed
Access
1030/1240
Standard 765-905
High
Speed
Access
895-1080
3.7/5.0
184 T
5.6/7.5
213 T
EFF.
(%)
83
87
ADJUSTABLE MOTOR PULLEY
2
DESIG-
NATION
PITCH
DIA.
(mm/IN.)
BORE
(mm/IN.)
1VP56
1VP62
109-135
4.3-5.3
29/1-1/8
1VP68
1VP75
140-165
5.5-6.5
35/1-3/8
FIXED BLOWER PULLEY
DESIG-
NATION
BK80
BK75
BK110
BK100
PITCH
DIA.
(mm/IN.)
188/7.4
175/6.9
264/10.4
239/9.4
BORE
(mm/IN.)
25/1
30/1-3/16
3
DESIG-
NATION
BX68
BX81
BELT
(NOTCHED)
PITCH
LENGTH
(mm/IN.)
1773/69.8
2103/82.8
300 Standard 950/1130 7.5/10 254 T 89
1LVP58
B70A
157-188
(6.2-7.4)
A2
Bushing
1B5V94 241 (9.5)
B
Bushing
5VX840 2134/84
2.
3.
1.
All motors have a nominal speed of 1450 RPM, a 1.15 service factor and a solid base. They can operate to the limit of their service factor because they are located in the moving air, upstream of any heating device.
Do NOT close this pulley below 1 turn open.
Requires bushing (included in kit).
QTY.
1
1
1
1
1
Unitary Products Group 31
035-18940-000-B-1003
PHASING
YORK MODEL DM, units are properly phased at the factory. Check for proper compressor rotation. If the blower or compressors rotate in the wrong direction at start-up, the electrical connection to the unit is misphased. Change the incoming line connection phasing to obtain proper rotation. (Scroll compressors operate in only one direction. If the scroll is drawing low amperage, has similar suction and discharge pressures, or producing a high noise level, the scroll is misphased).
Scroll compressors require proper rotation to operate correctly. Units are properly phased at the factory. Do not change the internal wiring to make the blower, condenser fans, or compressor rotate correctly.
CHECKING AIR SUPPLY CFM
The RPM of the supply air blower will depend on the required CFM, the unit accessories or options and the static resistances of both the supply and the return air duct systems. With this information, the RPM for the supply air blower and the motor pulley adjustment
(turns open) can be determined from the Blower Performance Data Tables.
High speed drive accessories (containing a smaller blower pulley and a shorter belt) are available for applications requiring the supply air blower to produce higher CFM's and/or higher static pressures. Use
Model 1LD0418 for 15 ton units and Model 1LD0419 for 20 ton units. Refer to the Blower Motor and Drive
Data Table 17.
FIGURE 14 - BELT ADJUSTMENT
Note the following:
1. The supply air CFM must be within the limitations shown in the Unit Application Data Table 1.
2. Pulleys can be adjusted in half turn increments.
3. The tension on the belt should be adjusted as shown in the Belt Adjustment Figure 14.
32 Unitary Products Group
035-18940-000-B-1003
Start the supply air blower motor. Adjust the resistances in both the supply and the return air duct systems to balance the air distribution throughout the conditioned space. The job specifications may require that this balancing be done by someone other than the equipment installer.
To check the supply air CFM after the initial balancing has been completed:
1. Remove the two 5/16" dot plugs from the blower motor and the filter access panels shown in the
Dimensions and Clearances Figure 13.
2. Insert at least 8" of 1/4 inch tubing into each of these holes for sufficient penetration into the air flow on both sides of the indoor coil.
NOTE: The tubes must be inserted and held in a position perpendicular to the air flow so that velocity pressure will not affect the static pressure readings.
3. Using an inclined manometer, determine the pressure drop across a dry evaporator coil. Since the moisture on an evaporator coil may vary greatly, measuring the pressure drop across a wet coil under field conditions would be inaccurate. To assure a dry coil, the compressors should be deactivated while the test is being run.
4. Knowing the pressure drop across a dry coil, the actual CFM through the unit can be determined from the curve in Pressure Drop vs. Supply Air
CFM Figure 15.
Failure to properly adjust the total system air quantity can result in extensive blower damage.
After readings have been obtained, remove the tubes and reinstall the two 5/16" dot plugs that were removed in Step 1.
NOTE: DE-ENERGIZE THE COMPRESSORS
BEFORE TAKING ANY TEST MEASURE-
MENTS TO ASSURE A DRY INDOOR COIL.
0.65
0.6
0.55
0.5
0.45
0.4
0.35
0.3
0.25
4
180 MBH
5
240 MBH 300 MBH
6 7 8 9 10 11
NOMINAL CFM (THOUSANDS) SUPPLY AIR
12 13
FIGURE 15 - PRESSURE DROP ACROSS A DRY INDOOR COIL VS SUPPLY AIR CFM FOR ALL UNIT
TONNAGES
Unitary Products Group 33
OPERATION
SEQUENCE OF OPERATIONS OVERVIEW
For these units, the thermostat makes a circuit between "R" and "Y1" for the first stage of cooling.
The call is passed to the unit control board (UCB), which then determines whether the requested operation is available and, if so, which components to energize.
For gas heating, the UCB monitors the "W1" call but does not handle the operation of the gas furnace. An ignition control board controls the gas heater operation.
For electric heat units, the UCB passes the call to the electric heater.
In both cases, when the "W1" call is sensed, the indoor air blower is energized following a specified heating delay.
If at any time a call for both heating and cooling are present, the heating operation will be performed. If operating, the cooling system is halted as with a completion of a call for cooling. Heating always takes priority.
COOLING SEQUENCE OF OPERATION
CONTINUOUS BLOWER
By setting the room thermostat fan switch to "ON," the supply air blower will operate continuously.
INTERMITTENT BLOWER
With the room thermostat fan switch set to "AUTO" and the system switch set to either the "AUTO" or "HEAT" settings, the blower is energized whenever a cooling or heating operation is requested. The blower is energized after any specified delay associated with the operation.
When energized, the indoor blower has a minimum run time of 30 seconds. Additionally, the indoor blower has a delay of 10 seconds between operations.
NO OUTDOOR AIR OPTIONS
When the thermostat calls for the first stage of cooling, the low-voltage control circuit from "R" to "Y1" and "G" is completed. For first stage cooling, compressor #1,
035-18940-000-B-1003 condenser fan motor #1, and condenser fan motor #2 for 15 and 20T only (if the ambient temperature is above 60ºF), are energized. After completing the specified fan on delay for cooling, the UCB will energize the blower motor.
When the thermostat calls for the second stage of cooling, the low-voltage control circuit from "R" to "Y2" is completed. Compressor #2, and condenser fan motor
#2, 25T only (if the ambient temperature is above
60ºF), is energized, provided it has not been lockedout.
If there is an initial call for both stages of cooling, the
UCB will delay energizing compressor #2 by 30 seconds in order to avoid a power in rush.
Once the thermostat has been satisfied, it will de-energize Y1 and Y2. If the compressors have satisfied their minimum run times, the compressors and condenser fans are de-energized. Otherwise, the unit operates each cooling system until the minimum run times for the compressors have been completed. Upon the final compressor de-energizing, the blower is stopped following the elapse of the fan off delay for cooling.
To be available, a compressor must not be locked-out due to a high or low-pressure switch or freezestat trip and the anti-short cycle delay (ASCD) must have elapsed.
ECONOMIZER WITH SINGLE ENTHALPY SENSOR -
When the room thermostat calls for "first-stage" cooling, the low voltage control circuit from "R" to "G" and
"Y1" is completed. The UCB energizes the blower motor (if the fan switch on the room thermostat is set in the "AUTO" position) and drives the economizer dampers from fully closed to their minimum position. If the enthalpy of the outdoor air is below the setpoint of the enthalpy controller (previously determined), "Y1" energizes the economizer. The dampers will modulate to maintain a constant supply air temperature as monitored by the discharge air sensor. If the outdoor air enthalpy is above the setpoint, "Y1" energizes compressor #1, condenser fan motor #1, and condenser fan motor #2, 15 and 20T only (if the ambient temperature is above 60°F).
When the thermostat calls for "second-stage" cooling, the low voltage control circuit from "R" to "Y2" is completed. The UCB energizes the first available compressor If the enthalpy of the outdoor air is below the setpoint of the enthalpy controller (i.e. first stage
34 Unitary Products Group
035-18940-000-B-1003 has energized the economizer), "Y2" will energize compressor #1. If the outdoor air is above the setpoint,
"Y2" will energize compressor #2.
Once the thermostat has been satisfied, it will de-energize Y1 and Y2. If the compressors have satisfied their minimum run times, the compressors and condenser fans are de-energized. Otherwise, the unit operates each cooling system until the minimum run times for the compressors have been completed. Upon the final compressor de-energizing, the blower is stopped following the elapse of the fan off delay for cooling, and the economizer damper goes to the closed position. If the unit is in continues fan operation the economizer damper goes to the min. position.
ECONOMIZER WITH DUAL ENTHALPY SENSORS -
The operation with the dual enthalpy sensors is identical to the single sensor except that a second enthalpy sensor is mounted in the return air. This return air sensor allows the economizer to choose between outdoor air and return air, whichever has the lowest enthalpy value, to provide maximum operating efficiency.
ECONOMIZER (SINGLE OR DUAL) WITH POWER
EXHAUST -
This system operates as specified above with one addition. The power exhaust motor is energized 45 seconds after the actuator position exceeds the exhaust fan setpoint on the economizer control. When the power exhaust is operating, the second stage of mechanical cooling will not operate. As always, the "R" to "G" connection provides minimum position but does not provide power exhaust operation.
MOTORIZED OUTDOOR AIR DAMPERS -
This system operation is the same as the units with no outdoor air options with one exception. When the "R" to
"G" circuit is complete, the motorized damper drives open to a position set by the thumbwheel on the damper motor. When the "R" to "G" circuit is opened, the damper spring returns fully closed.
COOLING OPERATION ERRORS
Each cooling system is monitored for operation outside of the intended parameters. Errors are handled as described below. All system errors override minimum run times for compressors.
HIGH-PRESSURE LIMIT SWITCH
During cooling operation, if a high-pressure limit switch opens, the UCB will de-energize the associated compressor, initiate the ASCD (Anti-short cycle delay), and, if the other compressor is idle, stop the condenser fans. If the call for cooling is still present at the conclusion of the ASCD, the UCB will re-energize the halted compressor.
Should a high-pressure switch open three times within two hours of operation, the UCB will lock-out the associated compressor and flash a code (see Table 23). If the other compressor is inactive, the condenser fans will be de-energized.
LOW-PRESSURE LIMIT SWITCH
The low-pressure limit switch is not monitored during the initial 30 seconds of a cooling system's operation.
For the following 30 seconds, the UCB will monitor the low-pressure switch to ensure it closes. If the low-pressure switch fails to close after the 30-second monitoring phase, the UCB will de-energize the associated compressor, initiate the ASCD, and, if the other compressor is idle, stop the condenser fans.
Once the low-pressure switch has been proven (closed during the 30-second monitor period described above), the UCB will monitor the low-pressure limit switch for any openings. If the low-pressure switch opens for greater than 5 seconds, the UCB will de-energize the associated compressor, initiate the ASCD, and, if the other compressor is idle, stop the condenser fans.
If the call for cooling is still present at the conclusion of the ASCD, the UCB will re-energize the halted compressor.
Should a low-pressure switch open three times within one hour of operation, the UCB will lock-out the associated compressor and flash a code (Table 23). If the other compressor is inactive, the condenser fans will be de-energized.
FREEZESTAT
During cooling operation, if a freezestat opens, the
UCB will de-energize the associated compressor, initiate the ASCD, and, if the other compressor is idle, stop the condenser fans. If the call for cooling is still present at the conclusion of the ASCD, the UCB will reenergize the halted compressor.
Unitary Products Group 35
Should a freezestat open three times within two hours of operation, the UCB will lock-out the associated compressor and flash a code (Table 23). If the other compressor is inactive, the condenser fans will be deenergized.
LOW AMBIENT COOLING
To determine when to operate in low ambient mode, the UCB has a pair of terminals connected to a temperature-activated switch set at 30ºF. When the low ambient switch is closed and the thermostat is calling for cooling, the UCB will operate in the low ambient mode.
Low ambient mode operates the compressors in this manner: 10 minutes on, 5 minutes off. The indoor blower is operated throughout the cycle. The 5-minute off period is necessary to defrost the indoor coil.
Low ambient mode always begins with compressor operation. Compressor minimum run time may extend the minutes of compressor operation. The defrost cycle will begin immediately following the elapse of the minimum run time.
When operating in low ambient mode, the UCB will not lockout the compressors due to a freezestat trip. However, a freezestat trip will de-energize the associated compressor. If the call for cooling is still present at the end of the ASCD and the freezestat has closed, the unit will resume operation.
SAFETY CONTROLS
The unit control board monitors the following inputs for each cooling system:
1. A suction line freezestat to protect against low evaporator temperatures due to a low airflow or a low return air temperature, (opens at 26 ± 5 °F and resets at 38 ± 5°F).
2. A high-pressure switch to protect against excessive discharge pressures due to a blocked condenser coil or a condenser motor failure, (opens at
380 ± 10 psig and resets at 300 ± 10 psig).
3. A low-pressure switch to protect against loss of refrigerant charge, (opens at 7 ± 3 psig and resets at 22 ± 5 psig).
The above pressure switches are hard-soldered to the unit. The refrigeration systems are independently mon-
035-18940-000-B-1003 itored and controlled. On any fault, only the associated system will be affected by any safety/preventive action.
The other refrigerant system will continue in operation unless it is affected by the fault as well.
The unit control board monitors the temperature limit switch of electric heat units and the temperature limit switch and the gas valve of gas furnace units.
COMPRESSOR PROTECTION
The compressors also have inherent (internal) protection. If there is an abnormal temperature rise in a compressor, the protector will open to shut down the compressor. The UCB incorporates features to minimize compressor wear and damage. An anti-short cycle delay (ASCD) is utilized to prevent operation of a compressor too soon after its previous run. Additionally, a minimum run time is imposed any time a compressor is energized.
The ASCD is initiated on unit start-up and on any compressor reset or lock-out.
FLASH CODES
The UCB will initiate a flash code associated with errors within the system. Refer to UNIT CONTROL
BOARD FLASH CODES Table 23.
RESET
Remove the call for cooling, by raising thermostat setting higher than the conditioned space temperature.
This resets any pressure or freezestat flash codes.
ELECTRIC HEATING SEQUENCE OF OPERATIONS
The following sequence describes the operation of the electric heat section.
Single-stage heating (applies only to 18 KW heater, all other heaters MUST use a two-stage thermostat): a. Upon a call for heat by the thermostat, the heater contactor (6M) will be energized. After completing the specified fan on delay for heating, the UCB will energize the blower motor.
b. The thermostat will cycle the electric heat to satisfy the heating requirements of the conditioned space.
Two-stage heating (applies to all heaters except 18
KW):
36 Unitary Products Group
035-18940-000-B-1003 a. Upon a call for first-stage heat by the thermostat, the heater contactor (6M) (6M & 7M on 72 KW, 240V) will be energized. After completing the specified fan on delay for heating, the UCB will energize the blower motor.
If the second stage of heat is required, heater contactor (7M) will be energized. Note that on the 54
KW, 240V heater, heater contactors (7M & 8M) will be energized and on the 72 KW, 240V heater, heater contactors (8M & 9M) will be energized. After completing the specified fan on delay for heating, the UCB will energize the blower motor.
b. The thermostat will cycle the electric heat to satisfy the heating requirements of the conditioned space.
NOTE: All 50 Hz heaters are provided with manual reset backup protection limits. These will deenergize the heaters should the primary limit fail to open or the contactors fail to open in a failure mode.
HEATING OPERATION ERRORS
TEMPERATURE LIMIT
If the UCB senses zero volts from the high temperature limit, the indoor blower motor is immediately energized.
This limit is monitored regardless of unit operation status, i.e. the limit is monitored at all times.
If the temperature limit opens three times within one hour, it will lock-on the indoor blower motor and a flash code is initiated (See Table 23).
SAFTEY CONTROLS
The unit control board monitors the temperature limit switch of electric heat units.
The control circuit includes the following safety controls:
1. Temperature Limit Switch (TLS 1, 2).
This control is located inside the heater compartment and is set to open at the temperature indicated in the Limit Control Setting Table 18. It resets automatically. The limit switch operates when a high temperature condition, caused by inadequate supply air flow occurs, thus shutting down the heater and energizing the blower.
2. Temperature Limit Switch (TLS 3, 4, 5 and 6).
This control is located inside the heater compartment and is set to open at the temperature indicated in the Limit Control Setting Table 18. It is a manual reset limit. These limit switches will deenergize the heaters should the primary limit fail to open or the contactors fail to open in a failure mode.
TABLE 18: LIMIT CONTROL SETTING
UNIT
(Tons) VOLTAGE
HEATER kW
15, 20,
25
415
18
36
54
72
TEMPERATURE LIMIT
SWITCH 1, 2
OPENS, ºF
120
120
120
120
TEMPERATURE
LIMIT SWITCH 3, 4, 5,
6 OPENS, ºF
170
170
170
170
FLASH CODES
The UCB will initiate a flash code associated with errors within the system. Refer to UNIT CONTROL
BOARD FLASH CODES Table 23.
RESET
Remove the call for heating by lowering the thermostat setting lower than the conditioned space temperature.
This resets any flash codes.
HEAT ANTICIPATOR SETPOINTS
It is important that the anticipator setpoint be correct.
Too high of a setting will result in longer heat cycles and a greater temperature swing in the conditioned space. Reducing the value below the correct setpoint will give shorter "ON" cycles and may result in the lowering of the temperature within the conditioned space.
Refer to Table 19 for the required heat anticipator setting.
TABLE 19: ELECTRIC HEAT ANTICIPATOR
HEATER
KW
18
36
54
72
SETPOINTS
VOLTAGE
380/415-3-50
SETTING, AMPS
TH1 TH2
0.29
0.29
-
0.29
0.29
0.29
0.29
0.29
GAS HEATING SEQUENCE OF OPERATIONS
The following sequence describes the operation of the gas heat section.
Unitary Products Group 37
24V power is removed from the module either at the unit or by resetting the room thermostat.
NOTE: That the second stage furnace can operate even if first stage has locked out.
When the thermostat satisfies de-energizing the
"RW2"and "RW1", thus opening all gas valves. The blower motor will continue to run after the furnace is shut down until the specified fan off delay for heating has been satisfied. The UCB will de-energize the blower motor.
035-18940-000-B-1003
When the thermostat calls for the first stage of heating, the low-voltage control circuit from "R" to "W1" and "G" is completed, thru the UCB. The heat relay "RW1" is energized. The "RW1-2" contacts close energizing the draft motor control. The draft motor control contacts close and start the draft motor. As the speed of the draft motor reaches approximately 2500 RPM, the centrifugal switch contact, located on the end of the draft motor shaft, closes to power the first stage ignition module "IC1", thru the "RW1-1 contacts.
Ignition module "IC1" will immediately start the first stage igniter sparking and will open the redundant valve located inside the first stage main gas valve
"GV1" to allow a flow of gas to only the first stage carryover tube. Only after the pilot flame has been ignited and the presence of pilot flame detected at the "IC1" by a signal sent back through the flame sensor is sparking terminated and the first stage main gas valve opened.
Gas flows into each of the main burners and is ignited from the carryover tube flame.
After completing the specified fan on delay for heating, the UCB will energize the blower motor.
If "IC1" fails to detect a pilot flame, it will continue to try for a maximum of 85 seconds to ignite the pilot tube. If the pilot flame is not detected, then "IC1" will lock out first stage furnace operation for five minutes or until
24V power is removed from the module either at the unit or by resetting the room thermostat.
When the thermostat calls for the second stage of heating, the low-voltage control circuit from "R" to "W2" is completed, thru the UCB. Heat relay "RW2" is energized. The "RW2-1" contact is closed energizing the second stage ignition module "IC2". "IC2" will immediately start the second stage igniter sparking and will open the redundant valve located inside the second stage main gas valve "GV2" to allow a flow of gas to the second stage carryover tube. Only after the pilot flame has been ignited and the presence of pilot flame detected at "IC2" by a signal sent back through the flame sensor is sparking terminated and the main gas valve opened.
Gas flows into each of the second stage main burners and is ignited from the carryover tube flame.
If "IC2" fails to detect a pilot flame, it will continue to try for a maximum of 85 seconds to ignite the pilot tube. If the pilot flame is not detected, then "IC2" will lock out first stage furnace operation for five minutes or until
REDUNDANT
VALVE
GAS MAIN
MAIN VALVE
GAS
VALVE
TO MAIN
BURNER
TO PILOT BURNER
FIGURE 16 - GAS VALVE PIPING
When the thermostat calls for the first stage of heating, the low-voltage control circuit from "R" to "W1" is completed. A call for heat passes through the UCB to the ignition control board (ICB). The UCB monitors the
"W1" call and acts upon any call for heat. Once voltage has been sensed at “W1”, the UCB will initiate the fan on delay for heating, energizing the indoor blower after the specified delay has elapsed.
When the thermostat has been satisfied, heating calls are ceased. The GV is immediately de-energized. The blower is de-energized after the fan off delay for heating has elapsed. The draft motor performs a 25-second post purge.
GAS HEATING OPERATION ERRORS
TEMPERATURE LIMIT
If the UCB senses zero volts from the high temperature limit, the indoor blower motor is immediately energized.
When the UCB again senses 24 volts from the temperature limit, the draft motor will perform a 25-second post-purge and the indoor blower will be de-energized following the elapse of the fan off delay for heating.
This limit is monitored regardless of unit operation status, i.e. the limit is monitored at all times.
38 Unitary Products Group
035-18940-000-B-1003
If the temperature limit opens three times within one hour, it will lock-on the indoor blower motor and a flash code is initiated (See Table 23).
GAS VALVE
The UCB continuously monitors the GV. Any time the
UCB senses voltage at the GV without a call for heat for a continuous five-minute period, the UCB will lockon the indoor blower and a flash code is initiated
(Table 23). When voltage is no longer sensed at the
GV, the UCB will de-energize the indoor blower following the elapse of the fan off delay for heating.
If voltage has been sensed at the GV for at least 15 seconds during the fan on delay for heating and GV voltage or "W1" is lost, the indoor blower is forced on for the length of the fan off delay for heating.
SAFETY CONTROLS
The unit control board monitors the temperature limit switch and the gas valve of gas furnace units.
The control circuit includes the following safety controls:
1. Limit Control (LS).
This control is located inside the heat exchanger compartment and is set to open at the temperature indicated in the Limit Control Setting Table 20. It resets automatically. The limit switch operates when a high temperature condition, caused by inadequate supply air flow occurs, thus shutting down the ignition control and closing the main gas valves and energizing the blower.
2. Centrifugal Switch (CS).
If the draft motor should fail, the centrifugal switch attached to the shaft of the motor prevents the ignition controls and gas valves from being energized.
3. Redundant Gas Valve.
There are two separate gas valves in the furnace.
Each valve contains a main and a redundant valve.
The redundant valves are located upstream of the main gas valves. Should either or both of the main gas valves fail in the open position the redundant valves serve as back-ups and shut off the flow of gas.
4. Flame Sensor Rod / 100% Ignition Control Lock-
Out.
The flame rods and controls are located per Proper
Flame Adjustment Figure 19. If an ignition control fails to detect a signal from the flame sensor indicating the pilot flame is properly ignited, then the main gas valve will not open. It will continue to try and ignite the pilot for a maximum of 85 seconds, then if the pilot flame is not detected, the ignition control will lock out furnace operation until 24V power is removed from the module either at the unit or by resetting the room thermostat.
5. Rollout Switch.
This switch is located above the main burners in the control compartment, which in the event of a sustained main burner rollout shuts off and locks out both ignition controls closing both gas valves.
The ignition controls lock out furnace operation until 24V power is removed from the controls either at the unit or by resetting the room thermostat.
NOTE: The auto reset rollout switch must reset before allowing furnace operation.
6. Auxiliary limit switch (AUX) -
This control is located inside the heat exchanger compartment and is set to open at 190°F. It is a manual reset switch. If AUX trips, then the primary limit has not functioned correctly. Replace the primary limit.
TABLE 20: LIMIT CONTROL SETTING
Units
(Tons)
15, 20 & 25
15, 20 & 25
Capacity, MBH
Input Output
300
400
240
320
Limit Control
Opens, ºF
195
195
Unitary Products Group 39
I G N . C O N T R O L # 1
S E N S O R # 1
I G N I T O R # 2
G V 2
G A S
V A L V E
R O L L O U T S W .
I G N . C O N T R O L # 2
G V 1
G A S
V A L V E
I G N I T O R # 1
S E N S O R # 2
B U R N E R C O M P A R T M E N T
FIGURE 17 - GAS VALVE AND CONTROLS
FLASH CODES
The UCB will initiate a flash code associated with errors within the system. Refer to UNIT CONTROL
BOARD FLASH CODES Table 23.
RESETS
Remove the call for heating by lowering the thermostat setting lower than the conditioned space temperature.
This resets any flash codes.
HEAT ANTICIPATOR SETPOINTS
It is important that the anticipator setpoint be correct.
Too high of a setting will result in longer heat cycles and a greater temperature swing in the conditioned space. Reducing the value below the correct setpoint will give shorter "ON" cycles and may result in the lowering of the temperature within the conditioned space.
TABLE 21: GAS HEAT ANTICIPATOR SETPOINTS
Gas Valve
Anticipator Setpoint
1st Stage 2nd Stage
Honeywell VR8440
White-Rodgers 36C68
0.30 amp 0.11 amp
035-18940-000-B-1003
START-UP (COOLING)
PRESTART CHECK LIST
After installation has been completed:
1. Check the electrical supply voltage being supplied.
Be sure that it is the same as listed on the unit nameplate.
2. Set the room thermostat to the off position.
3. Turn unit electrical power on.
4. Set the room thermostat fan switch to on.
5. Check indoor blower rotation.
• If blower rotation is in the wrong direction.
Refer to Phasing Section in general information section.
• Check blower drive belt tension.
6. Check the unit supply air (CFM). See "CHECKING
SUPPLY AIR CFM" on page 32.
7. Measure evaporator fan motor's amp draw.
8. Set the room thermostat fan switch to off.
9. Turn unit electrical power off.
OPERATING INSTRUCTIONS
1. Turn unit electrical power on.
2. Set the room thermostat setting to lower than the room temperature.
3. First stage compressors will energize after the built-in time delay (five minutes).
4. The second stage of the thermostat will energize second stage compressor if needed.
POST START CHECK LIST
1. Verify proper system pressures for both circuits.
2. Measure the temperature drop across the evaporator coil.
40 Unitary Products Group
035-18940-000-B-1003
3. Measure the system Amperage draw across all legs of 3 phase power wires.
4. Measure the condenser fan amp draw.
SHUT DOWN
1. Set the thermostat to highest temperature setting.
2. Turn off the electrical power to the unit.
START-UP (GAS HEAT)
PRE-START CHECK LIST
Complete the following checks before starting the unit.
1. Check the type of gas being supplied. Be sure that it is the same as listed on the unit nameplate.
2. Make sure that the vent and combustion air hoods have been properly installed.
OPERATING INSTRUCTIONS
This furnace is equipped with an intermittent pilot and automatic re-ignition system. DO
NOT attempt to manually light the pilot.
TO LIGHT PILOT AND MAIN BURNERS:
1. Turn “off” electric power to unit.
2. Turn room thermostat to lowest setting.
3. Turn gas valve knob to “on” position.
4. Turn “on” electric power to unit.
5. Set room thermostat to desired temperature.
(If thermostat “set” temperature is above room temperature, pilot burner ignition will occur and, after an interval to prove pilot flame, main burners will ignite).
TO SHUT DOWN:
1. Turn “off” electric power to unit.
2. Depress knob of gas valve while turning to “off” position.
POST-START CHECK LIST (GAS)
After the entire control circuit has been energized and the heating section is operating, make the following checks:
1. Check for gas leaks in the unit piping as well as the supply piping.
FIRE OR EXPLOSION HAZARD
FAILURE TO FOLLOW THE SAFETY WARN-
ING EXACTLY COULD RESULT IN SERIOUS
INJURY, DEATH OR PROPERTY DAMAGE.
NEVER TEST FOR GAS LEAKS WITH AN
OPEN FLAME. USE A COMMERICALLY
AVAILABLE SOAP SOLUTION MADE SPE-
CIFICALLY FOR THE DETECTION OF
LEAKS TO CHECK ALL CONNECTIONS. A
FIRE OR EXPLOSION MAY RESULT CAUS-
ING PROPERTY DAMAGE, PERSONAL
INJURY OR LOSS OF LIFE.
2. Check for correct manifold gas pressures. See
“Checking Gas Input” page 42.
3. Check the supply gas pressure. It must be within the limits shown on rating nameplate. Supply pressure should be checked with all gas appliances in the building at full fire. At no time should the standby gas line pressure exceed 13", nor the operating pressure drop below 5.0" for natural gas units. If gas pressure is outside these limits, contact the local gas utility for corrective action.
FIGURE 18 - TYPICAL GAS VALVE
Unitary Products Group 41
MANIFOLD GAS PRESSURE ADJUSTMENT
Small adjustments to the high-fire gas flow may be made by turning the pressure regulator adjusting screw on the automatic gas valve.
Adjust as follows:
1. Remove the cap on the regulator. It's located next to the push-on electrical terminals.
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 these furnaces is 3.65 IWG ±0.3.
035-18940-000-B-1003
1. Remove the screws holding either end of the manifold to the burner supports.
2. Open the union fitting in the gas supply line just upstream of the unit gas valve and downstream from the main manual shut-off valve.
3. Remove the gas piping closure panel.
4. Disconnect wiring to the gas valves and spark ignitors. Remove the manifold-burner gas valve assembly by lifting up and pulling back.
B U R N E R A S S E M B L Y B R A C K E T
F L A M E S E N S O R B U L B
1 / 8 " G A P B E T W E E N C A R R Y - O V E R
T U B E A N D F L A M E S E N S O R B U L B
C A R R Y - O V E R T U B E
FIGURE 19 - PROPER FLAME ADJUSTMENT
PILOT CHECKOUT
The pilot flame should envelope the end of the flame sensor. To adjust pilot flame, (1) remove pilot adjustment cover screw, (2) increase or decrease the clearance for air to the desired level, (3) be sure to replace cover screw after adjustment to prevent possible gas leakage.
Put the system into operation and observe through complete cycle to be sure all controls function properly.
BURNER INSTRUCTIONS
To check or change burners, pilot or orifices, CLOSE
MAIN MANUAL SHUT-OFF VALVE AND SHUT OFF
ALL ELECTRIC POWER TO THE UNIT.
FIGURE 20 - TYPICAL FLAME APPEARANCE
Burners are now accessible for service.
Reverse the above procedure to replace the assemblies. Make sure that burners are level and seat at the rear of the heat exchanger.
BURNER AIR SHUTTER ADJUSTMENT
Adjust burner shutters so no yellow flame is observed in the heat exchanger tubes.
CHECKING GAS INPUT
NATURAL GAS
1. Turn off all other gas appliances connected to the gas meter.
2. With the furnace turned on, measure the time needed for one revolution of the hand on the smallest dial on the meter. A typical gas meter usually has a 1/2 or a 1 cubic foot test dial.
3. Using the number of seconds for each revolution and the size of the test dial increment, find the cubic feet of gas consumed per hour from the Gas
Rate - Cubic Feet Per Hour Table 22.
If the actual input is not within 5% of the furnace rating
(with allowance being made for the permissible range
42 Unitary Products Group
035-18940-000-B-1003 of the regulator setting), replace the orifice spuds with spuds of the proper size.
NOTE: To find the Btu input, multiply the number of cubic feet of gas consumed per hour by the
Btu content of the gas in your particular locality
(contact your gas company for this information
- it varies widely from city to city.)
TABLE 22: GAS RATE - CUBIC FEET PER HOUR
Seconds for One
Rev.
4
6
8
10
12
14
16
18
20
22
24
26
28
Size of Test Dial
1/2 cu. ft.
1 cu. ft.
450
300
228
180
150
129
113
100
90
82
75
69
64
900
600
450
360
300
257
225
200
180
164
150
138
129
Example: By actual measurement, it takes 13 seconds for the hand on the 1cubic foot dial to make a revolution with just a 300,000 Btuh furnace running.
Read across to the column in the table above, headed “1 Cubic Foot”, where you will see that 278 cubic feet of gas per hour are consumed by the furnace at that rate. Multiply 278 x 1050 (the Btu rating of the gas obtained from the local gas company). The result is 292,425 Btuh, which is close to the 300,000 Btuh rating of the furnace.
ADJUSTMENT OF TEMPERATURE RISE
The temperature rise (or temperature difference between the return air and the heated air from the furnace) must lie within the range shown on the rating plate and the data in the Gas Heat Application Table 4.
CFM =
Btuh Input x 0.8
After the temperature rise has been determined, the cfm can be calculated as follows:
After about 20 minutes of operation, determine the furnace temperature rise. Take readings of both the return air and the heated air in the ducts (about six feet from the furnace) where they will not be affected by radiant heat. Increase the blower cfm to decrease the temperature rise; decrease the blower cfm to increase the rise. Refer to the Blower Motor and Drive Data
Table 17.
BELT DRIVE BLOWER
All units have belt drive single-speed blower motors.
The variable pitch pulley on the blower motor can be adjusted to obtain the desired supply air CFM.
TROUBLESHOOTING
COOLING TROUBLE SHOOTING GUIDE
Troubleshooting of components may require opening the electrical control box with the power connected to the unit. to the unit prior to any of the following maintenance procedures so as to prevent personal injury.
Use extreme care when working with live circuits!
Check the unit nameplate for the correct line voltage and set the voltmeter to the correct range before making any connections with line terminals.
When not necessary, shut off all electric power
Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation, which could cause injury to person and/or damage unit components. Verify proper operation after servicing.
On calls for cooling, if the compressors are operating but the supply air blower motor does not energize after a short delay (the room thermostat fan switch is in the
“AUTO” position).
1. Turn the thermostat fan switch to the ON position.
If the supply air blower motor does not energize, go to Step 3.
2. If the blower motor runs with the fan switch in the
ON position but will not run after the first compressor has energized when the fan switch is in the
AUTO position, check the room thermostat for contact between R and G in the AUTO position during calls for cooling.
Unitary Products Group 43
3. If the supply air blower motor does not energize when the fan switch is set to ON, check that line voltage is being supplied to the contacts of the M3, contactor, and that the contactor is pulled in. Check for loose wiring between the contactor and the supply air blower motor.
4. If M3 is pulled in and voltage is supplied to M3, lightly touch the supply air blower motor housing. If it is hot, the motor may be off on internal protection. Cancel any thermostat calls and set the fan switch to AUTO. Wait for the internal overload to reset. Test again when cool.
5. If M3 is not pulled in, check for 24 volts at the M3 coil. If 24 volts are present at M3 but M3 is not pulled in, replace the contactor.
6. Failing the above, if there is line voltage supplied at
M3, M3 is pulled in, and the supply air blower motor still does not operate, replace the motor.
7. If 24 volts is not present at M3, check that 24 volts is present at the UCB supply air blower motor terminal, “FAN”. If 24 volts is present at the FAN, check for loose wiring between the UCB and M3.
8. If 24 volts is not present at the “FAN” terminal, check for 24 volts from the room thermostat. If 24 volts are not present from the room thermostat, check for the following: a. proper operation of the room thermostat (contact between R and G with the fan switch in the ON position and in the AUTO position during operation calls), b. proper wiring between the room thermostat and the UCB, and c. loose wiring from the room thermostat to the UCB.
9. If 24 volts is present at the room thermostat but not at the UCB, check for proper wiring between the thermostat and the UCB, i.e. that the thermostat G terminal is connected to the G terminal of the UCB, and for loose wiring.
10. If the thermostat and UCB are properly wired, replace the UCB.
On calls for cooling, the supply air blower motor is operating but compressor #1 is not (the room thermostat fan switch is in the “AUTO” position).
1. If installed, check the position of the economizer blades. If the blades are open, the economizer is
035-18940-000-B-1003 providing free cooling and the compressors will not immediately operate. If both stages of cooling are requested simultaneously and the economizer provides free cooling, following a short delay compressor #1 will be energized unless it is locked out. If compressor #1 is locked out, compressor #2 is energized. Compressor #2 is always energized in place of compressor #1 when compressor #1 is requested but locked out.
2. If no economizer is installed or the economizer is not opening to provide free cooling and compressor #1 does not energize on a call for cooling, check for line voltage at the compressor contactor,
M1, and that the contactor is pulled in. Check for loose wiring between the contactor and the compressor.
3. If M1 is pulled in and voltage is supplied at M1, lightly touch the compressor housing. If it is hot, the compressor may be off on inherent protection.
Cancel any calls for cooling and wait for the internal overload to reset. Test again when cool.
4. If M1 is not pulled in, check for 24 volts at the M1 coil. If 24 volts are present and M1 is not pulled in, replace the contactor.
5. Failing the above, if voltage is supplied at M1, M1 is pulled in, and the compressor still does not operate, replace the compressor.
6. If 24 volts is not present at M1, check for 24 volts at the UCB terminal, C1. If 24 volts is present, check for loose wiring between C1 and the compressor contactor.
7. If 24 volts is not present at the C1 terminal, check for 24 volts from the room thermostat at the UCB
Y1 terminal. If 24 volts is not present from the room thermostat, check for the following: a. 24 volts at the thermostat Y1 terminal b. Proper wiring between the room thermostat and the
UCB, i.e. Y1 to Y1, Y2 to Y2 c.
Loose wiring from the room thermostat to the UCB.
8. If 24 volts is present at the UCB Y1 terminal, the compressor may be out due to an open high-pressure switch, low-pressure switch, or freezestat.
Check for 24 volts at the HPS1, LPS1, and FS1 terminals of the UCB. If a switch has opened, there should be a voltage potential between the UCB ter-
44 Unitary Products Group
035-18940-000-B-1003 minals, e.g. if LPS1 has opened, there will be a 24volt potential between the LPS1 terminals.
9. If 24 volts is present at the UCB Y1 terminal and none of the protection switches have opened, the
UCB may have locked out the compressor for repeat trips. The UCB should be flashing an alarm code. If not, press and release the ALARMS button on the UCB. The UCB will flash the last five alarms on the LED. If the compressor is locked out, cancel any call for cooling. This will reset any compressor lock outs.
NOTE: While the above step will reset any lockouts, compressor #1 may be held off for the ASCD.
See the next step.
10. If 24 volts is present at the UCB Y1 terminal and none of the switches are open and the compressor is not locked out, the UCB may have the compressor in an ASCD. Check the LED for an indication of an ASCD cycle. The ASCD should time out within
5 minutes. Press and release the TEST button to reset all ASCDs.
11. If 24 volts is present at the UCB Y1 terminal and the compressor is not out due to a protective switch trip, repeat trip lock out, or ASCD, the economizer terminals of the UCB may be improperly wired. Check for 24 volts at the Y1 “OUT” terminal of the UCB. If 24 volts is present, trace the wiring from Y1 “OUT” for incorrect wiring. If 24 volts is not present at the Y1 “OUT” terminal, the UCB must be replaced.
12.
For units without economizers :If 24 volts is present at the Y1 OUT terminal, check for 24 volts at the
Y1 “ECON” terminal. If 24 volts is not present, check for loose wiring from the Y1 “OUT” terminal to the Mate-N-Lock plug, the jumper in the Mate-N-
Lock plug, and in the wiring from the Mate-N-Lock plug to the Y1 “ECON” terminal.
13.
For units with economizers : If 24 volts is present at the Y1 “OUT” terminal, check for 24 volts at the Y1
“ECON” terminal. If 24 volts is not present, check for loose wiring from the Y1 “OUT” terminal to the
Mate-N-Lock plug, a poor connection between the
UCB and economizer Mate-N-Lock plugs, loose wiring from the Mate-N-Lock plug to the economizer, back to the Mate-N-Lock plug, and from the
Mate-N-Lock plug to the Y1 “ECON” terminal. If nothing is found, the economizer DME may have faulted and is failing to return the 24-volt “call” to the Y1 “ECON” terminal even though the economizer is not providing free cooling. To test, disconnect the Mate-N-Locks and jumper between the
WHITE and YELLOW wires of the UCB’s Mate-N-
Lock plug. If compressor #1 energizes, there is a fault in the economizer wiring or DME.
14. The UCB can be programmed to lock out compressor operation during free cooling and in low ambient conditions. These options are not enabled by default. Local distributors can test the UCB for this programming.
15. If none of the above corrected the error, test the integrity of the UCB. Disconnect the C1 terminal wire and jumper it to the Y1 terminal. DO NOT jump the Y1 to C1 terminals. If the compressor engages, the UCB has faulted.
16. If none of the above correct the error, replace the
UCB.
On calls for the second stage of cooling, the supply air blower motor and compressor #1 are operating but compressor #2 is not (the room thermostat fan switch is in the “AUTO” position).
1. If installed, check the position of the economizer blades. If the blades are open, the economizer is providing free cooling. If the second stage of cooling is requested, following a short delay, compressor #1 will be energized unless it is locked out. Typically, compressor #2 is energized only during free cooling if the call for the second stage of cooling persists for 20 minutes.
2. Compressor #2 will not energize simultaneously with compressor #1 if a call for both stages of cooling is received. The UCB delays compressor #2 by
30 seconds to prevent a power surge. If after the delay compressor #2 does not energize on a second stage call for cooling, check for line voltage at the compressor contactor, M2, and that the contactor is pulled in. Check for loose wiring between the contactor and the compressor.
3. If M2 is pulled in and voltage is supplied at M2, lightly touch the compressor housing. If it is hot, the compressor may be off on inherent protection.
Cancel any calls for cooling and wait for the internal overload to reset. Test again when cool.
Unitary Products Group 45
4. If M2 is not pulled in, check for 24 volts at the M2 coil. If 24 volts is present and M2 is not pulled in, replace the contactor.
5. Failing the above, if voltage is supplied at M2, M2 is pulled in, and the compressor still does not operate, replace the compressor.
6. If 24 volts is not present at M2, check for 24 volts at the UCB terminal, C2. If 24 volts are present, check for loose wiring between C2 and the compressor contactor.
7. If 24 volts is not present at the C2 terminal, check for 24 volts from the room thermostat at the UCB
Y2 terminal. If 24 volts is not present from the room thermostat, check for the following: a. 24 volts at the thermostat Y2 terminal b. Proper wiring between the room thermostat and the
UCB, i.e. Y1 to Y1, Y2 to Y2 c.
Loose wiring from the room thermostat to the UCB.
8. If 24 volts is present at the UCB Y2 terminal, the compressor may be out due to an open high-pressure switch, low-pressure switch, or freezestat.
Check for 24 volts at the HPS2, LPS2, and FS2 terminals of the UCB. If a switch has opened, there should be a voltage potential between the UCB terminals, e.g. if LPS2 has opened, there will be 24 volts of potential between the LPS2 terminals.
9. If 24 volts is present at the UCB Y2 terminal and none of the protection switches have opened, the
UCB may have locked out the compressor for repeat trips. The UCB should be flashing a code. If not, press and release the ALARMS button on the
UCB. The UCB will flash the last five alarms on the
LED. If the compressor is locked out, remove any call for cooling at the thermostat or by disconnecting the thermostat wiring at the Y2 UCB terminal.
This will reset any compressor lock outs.
NOTE: While the above step will reset any lock outs, compressor #1 will be held off for the ASCD, and compressor #2 may be held off for a portion of the ASCD. See the next step.
10. If 24 volts is present at the UCB Y2 terminal and none of the switches are open and the compressor is not locked out, the UCB may have the compressor in an ASCD. Check the LED for an indication of an ASCD cycle. The ASCD should time out within
035-18940-000-B-1003
5 minutes. Press and release the TEST button to reset all ASCDs.
11. The UCB can be programmed to lock out compressor operation during free cooling and in low ambient conditions. These options are not enabled by default. Local distributors can test the UCB for this programming.
12. If none of the above corrected the error, test the integrity of the UGB. Disconnect the C2 terminal wire and jumper it to the Y2 terminal. DO NOT jump the Y2 to C2 terminals. If the compressor engages, the UCB has faulted.
13. If none of the above correct the error, replace the
UCB.
On a call for cooling, the supply air blower motor and compressor #2 are operating but compressor #1 is not
(the room thermostat fan switch is in the “AUTO” position).
1. Compressor #2 is energized in place of compressor #1 when compressor #1 is unavailable for cooling calls. Check the UCB for alarms indicating that compressor #1 is locked out. Press and release the ALARMS button if the LED is not flashing an alarm.
2. Check for line voltage at the compressor contactor,
M1, and that the contactor is pulled in. Check for loose wiring between the contactor and the compressor.
3. If M1 is pulled in and voltage is supplied at M1, lightly touch the compressor housing. If it is hot, the compressor may be off on inherent protection.
Cancel any calls for cooling and wait for the internal overload to reset. Test again when cool.
4. If M1 is not pulled in, check for 24 volts at the M1 coil. If 24 volts is present and M1 is not pulled in, replace the contactor.
5. Failing the above, if voltage is supplied at M1, M1 is pulled in, and the compressor still does not operate, replace the compressor.
6. If 24 volts is not present at M1, check for 24 volts at the UCB terminal, C1. If 24 volts is present, check for loose wiring between C1 and the compressor contactor.
46 Unitary Products Group
035-18940-000-B-1003
7. If 24 volts is not present at the C1 terminal, check for 24 volts from the room thermostat at the UCB
Y1 terminal. If 24 volts are not present at the UCB
Y1 terminal, the UCB may have faulted. Check for
24 volts at the Y1 ECON terminal. If 24 volts is not present at Y1 “ECON”, the UCB has faulted. The
UCB should de-energize all compressors on a loss of call for the first stage of cooling, i.e. a loss if 24 volts at the Y1 terminal.
8. If 24 volts are present at the UCB Y1 terminal, the compressor may be out due to an open high-pressure switch, low-pressure switch, or freezestat.
Check for 24 volts at the HPS1, LPS1, and FS1 terminals of the UCB. If a switch has opened, there should be a voltage potential between the UCB terminals, e.g. if LPS1 has opened, there will be a 24volt potential between the LPS1 terminals.
9. If 24 volts is present at the UCB Y1 terminal and none of the protection switches have opened, the
UCB may have locked out the compressor for repeat trips. The UCB should be flashing a code. If not, press and release the ALARMS button on the
UCB. The UCB will flash the last five alarms on the
LED. If the compressor is locked out, remove any call for cooling. This will reset any compressor lock outs.
NOTE: While the above step will reset any lock outs, compressor #2 will be held off for the ASCD, and compressor #1 may be held off for a portion of the ASCD. See the next step.
10. If 24 volts is present at the UCB Y1 terminal and none of the switches are open and the compressor is not locked out, the UCB may have the compressor in an ASCD. Check the LED for an indication of an ASCD cycle. The ASCD should time out within
5 minutes. Press and release the TEST button to reset all ASCDs.
11. If 24 volts is present at the UCB Y1 terminal and the compressor is not out due to a protective switch trip, repeat trip lock out, or ASCD, the economizer terminals of the UCB may be improperly wired. Check for 24 volts at the Y1 “OUT” terminal of the UCB. If 24 volts is present, trace the wiring from Y1 “OUT” for incorrect wiring. If 24 volts is not present at the Y1 “OUT” terminal, the UCB must be replaced.
12.
For units without economizers : If 24 volts is present at the Y1 “OUT” terminal, check for 24 volts at the
Y1 “ECON” terminal. If 24 volts is not present, check for loose wiring from the Y1 “OUT” terminal to the Mate-N-Lock plug, the jumper in the Mate-N-
Lock plug, and in the wiring from the Mate-N-Lock plug to the Y1 “ECON” terminal.
For units with economizers : If 24 volts is present at the Y1 “OUT” terminal, check for 24 volts at the Y1
“ECON” terminal. If 24 volts is not present, check for loose wiring from the Y1 “OUT” terminal to the
Mate-N-Lock plug, a poor connection between the
UCB and economizer Mate-N-Lock plugs, loose wiring from the Mate-N-Lock plug to the economizer, back to the Mate-N-Lock plug, and from the Mate-N-Lock plug to the Y1 “ECON” terminal. The economizer board may have faulted and is not returning the 24 volts to the Y1 “ECON” terminal even though the economizer is not providing free cooling. To test the economizer board, disconnect the Mate-N-Locks and jumper between the WHITE and YELLOW wires of the
UCB’s Mate-N-Lock plug.
13. The UCB can be programmed to lock out compressor operation during free cooling and in low ambient conditions. These options are not enabled by default. They can be checked by local distributors.
14. If none of the above corrected the error, test the integrity of the UCB. Disconnect the C1 terminal wire and jumper it to the Y1 terminal. DO NOT jump the Y1 to C1 terminals. If the compressor engages, the UCB has faulted.
15. If none of the above correct the error, replace the
UCB.
Unitary Products Group 47
GAS HEAT TROUBLE SHOOTING GUIDE
Troubleshooting of components may require opening the electrical control box with the power connected to the unit. to the unit prior to any of the following maintenance procedures so as to prevent personal injury.
The furnace may shut down on a high temperature condition during the procedure. If this occurs, the UCB energize the supply air blower motor until the high temperature limit has reset.
Caution should be used at all times as the supply air blower may energize regardless of the room thermostat fan switch position.
On calls for heating, the draft motor operates and the furnace lights but the supply air blower motor does not energize after a short delay (the room thermostat fan switch is in “AUTO” position).
1. Place the thermostat fan switch in the “ON” position. If the supply air blower motor energizes, go to
Step 10.
Use extreme care when working with live circuits!
Check the unit nameplate for the correct line voltage and set the voltmeter to the correct range before making any connections with line terminals.
When not necessary, shut off all electric power
Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation, which could cause injury to person and/or damage unit components. Verify proper operation after servicing.
NOTE: To find the Btu input, multiply the number of cubic feet of gas consumed per hour by the
Btu content of the gas in your particular locality
(contact your gas company for this information
- it varies widely from city to city.).
035-18940-000-B-1003
2. If the supply air blower motor does not energize when the fan switch is set to “ON,” check that line voltage is being supplied to the contacts of the M3 contactor, and that the contactor is pulled in. Check for loose wiring between the contactor and the supply air blower motor.
3. If M3 is pulled in and voltage is supplied at M3, lightly touch the supply air blower motor housing. If it is hot, the motor may be off on inherent protection. Cancel any thermostat calls and set the fan switch to “AUTO”, wait for the internal overload to reset. Test again when cool.
4. If M3 is not pulled in, check for 24 volts at the M3 coil. If 24 volts is present at M3 but M3 is not pulled in, replace the contactor.
5. Failing the above, if there is line voltage supplied at
M3, M3 is pulled in, and the supply air blower motor still does not operate, replace the motor.
6. If 24 volts is not present at M3, check that 24 volts is present at the supply air blower motor terminal on the UCB. If 24 volts is present at the UCB terminal, check for loose wiring between the UCB and
M3.
7. If 24 volts is not present at the UCB supply air blower motor terminal, check for 24 volts from the room thermostat. If 24 volts is not present from the room thermostat, check for the following: a. Proper operation of the room thermostat (contact between R and G with the fan switch in the “ON” position and in the “AUTO” position during operation calls).
b. Proper wiring between the room thermostat and the
UCB.
c.
Loose wiring from the room thermostat to the UCB.
8. If 24 volts is present at the room thermostat but not at the UCB, check for proper wiring between the thermostat and the UCB, i.e. that the thermostat G terminal is connected to the G terminal of the UCB, and for loose wiring.
9. If the thermostat and UCB are properly wired, replace the UCB.
10. If the blower motor runs with the fan switch in the
“ON” position but does not run shortly after the furnace has ignited when the fan switch is in the
“AUTO” position, check the room thermostat for contact between R and G during “W1” calls.
48 Unitary Products Group
035-18940-000-B-1003
On calls for heating, the supply air blower operates but the draft motor does not (the room thermostat fan switch is in the “AUTO” position).
1. The draft motor has inherent protection. If the motor shell is hot to the touch, wait for the internal overload to reset.
2. If the motor shell is cold with the room thermostat calling for heat, check for line voltage at the motor's Mate-N-Lok connector attached to the evaporator partition. If line voltage is present, replace the draft motor.
3. If line voltage is not present, check for line voltage at the heat relay (RW1) contacts in the main control box and check to see if the (RW1) is pulled in.
4. If the (RW1) relay is pulled in, check for a loose line voltage connection.
5. If the (RW1) relay is not pulled in, check for 24 volts at the (RW1) coil. If 24 volts is present, replace the
(RW1) relay. If 24 volts is not present, check for a loose 24 volt connection back to the relay board and check the connections from the room thermostat to the relay board. If all connections are correct, replace the relay board.
The draft motor runs but the furnace does not light and the sparker does not spark.
1. The ignition control (IC1, IC2) may be locked out due to either a flame roll out or 100% shut off.
These safety features are described above. If lockout has occurred, 24V must be removed from the ignition controls. This is done at the unit or by resetting the room thermostat. After resetting 24V, check for proper furnace operation. If lock-out continues to occur, locate the source of the problem and correct.
2. Check all 24 volt connections from the relay board to and in the gas heat section. Check low voltage connections to the (ETD) located in the control box.
3. If the furnace is hot, it may be out on an over-temperature condition, wait for limit reset.
4. If the furnace is cold, check for 24 volts at wire 241 attached to the electrical time delay (ETD) located in the main control box. If 24 volts is not found, replace the ETD.
5. 24 volts is found at wire 241, remove the wires attached to the (TDR) and with a VOM, check for continuity across contacts 1 and 2. If none is found, the (TDR) is open and must be replaced. If there is continuity, re-attach the wires.With the draft motor running, check for 24 volts at terminal 4 of (RW1-2) and (RW2-1). If 24 volts is not present, the centrifugal switch (CS) has not closed or has gone bad.
Check the line voltage to the unit - if it is correct, replace the draft motor. If line voltage is low, call the power company.
6. Check for 24V at terminal 2 of (RW1-2 and RW2-
1). If 24V is not present, check for 24V at (RW1 and RW2) relay coils. If these relays are pulled in, then check for a loose connection at terminal 2 and terminal 4 of each relay. If no problem is found, then replace (RW1 and/or RW2) as required.
7. If 24 volts is present at the ignitor controls, check all control wiring at the ignitor controls and the high tension wire to the ignitors. Check that the ground wires from the ignitor controls, the gas valves and pilot burners are all intact and making good electrical connection. Check to make sure that the ceramic insulator on the pilot ignitors or sensors is not broken or cracked, if all are intact, replace the ignition control IC1 or IC2.
The draft motor runs and the ignitor sparks at the pilot burner but the pilot does not ignite and a gas odor is not detected at the draft motor outlet.
1. Check to make sure gas is being supplied to the unit. Make sure that the gas pressure to the unit is within the proper limits as described in the “POST
START CHECK LIST” page 41 and that the pilot adjust screw is allowing some flow of gas as described in “PILOT CHECKOUT” page 42.
2. Check all wiring between the ignitor control and the gas valve. Check to make sure the ground connections are intact.
3. If the wiring is intact, check for 24 volts across terminals “PV” and “COMMON” on the ignitor control.
If 24 volts is not present, replace the ignitor control.
4. If 24 volts is present, remove the pilot burner and remove the pilot orifice from the pilot burner. The orifice is removed in the direction opposite the flow of gas. Inspect the orifice for obstruction. If it is clear, replace the main gas valve.
Unitary Products Group 49
The ignitor sparks at the pilot burner but the pilot does not ignite and a gas odor is detected at the draft motor outlet.
1. Adjust the pilot adjust screw on the gas valve as described in “PILOT CHECKOUT” page 42.
2. Check the supply pressure as described in “POST
START CHECK LIST” page 41. Make adjustments as necessary.
3. Check the pilot orifice for obstruction as described in paragraph above. Clean as needed but the problem should not be the gas valve.
The pilot burner ignites but the ignitor continues to spark and the main burners do not ignite.
1. Make the same checks and adjustment as described in “PILOT CHECKOUT” page 42.
2. Check the supply pressure as described in “POST
START CHECK LIST” page 41. Make adjustments as necessary.
3. Make sure that the pilot burner is not bent or damaged.
4. Make sure that the ground connections at the pilot burner, gas valve and ignitor control are intact.
Check the high tension wire for good electrical connection. If all are intact, replace the ignitor module.
The pilot burner lights and the spark stops but the main burners do not light.
1. Check electrical connections between the ignitor control and the gas valve. If intact, check for 24 volts across terminals “MV” and “COMMON” terminals. If no voltage detected, replace ignitor control.
If voltage is present, replace gas valve.
035-18940-000-B-1003
Furnace lights with roll-out or one burner has delayed ignition.
1. Make sure that the pilot burner is aligned properly with the carryover as described in “PILOT CHECK-
OUT” page 42.
2. Make sure that the carryovers on adjoining burners are screwed fast and are level with respect to one another.
Main burners light but exhibit erratic flame characteristics.
1. Adjust air shutters as described in “BURNER AIR
SHUTTER ADJUSTMENT” page 42.
2. Check the main burner orifices for obstruction and alignment. Removal procedure is described in
BURNER INSTRUCTIONS page 42. Clean or replace burner orifices and burners as needed.
UNIT FLASH CODES
Various flash codes are utilized by the unit control board (UCB) to aid in troubleshooting. Flash codes are distinguished by the short on and off cycle used
(approximately 200ms on and 200ms off). To show normal operation, the control board flashes a 1 second on, 1 second off "heartbeat" during normal operation.
This is to verify that the UCB is functioning correctly.
Do not confuse this with an error flash code. To prevent confusion, a 1-flash, flash code is not used.
Current alarms are flashed on the UCB LED. Pressing and releasing the ALARMS button on the UCB can check the alarm history. The UCB will cycle through the last five (5) alarms, most recent to oldest, separating each alarm flash code by approximately 2 seconds.
In some cases, it may be necessary to "zero" the
ASCD for the compressors in order to perform troubleshooting. To reset all ASCDs for one cycle, press and release the UCB TEST button once.
50 Unitary Products Group
035-18940-000-B-1003
TABLE 23: UNIT CONTROL BOARD FLASH CODES
Flash Code Description
On Steady
Heart Beat
1 Flash
Control Failure - Replace Control
Normal Operation
Not Applicable
2 Flashes
3 Flashes
4 Flashes
5 Flashes
6 Flashes
7 Flashes
8 Flashes
9 Flashes
10 Flashes
11 Flashes
12 Flashes
13 Flashes
14 Flashes
OFF
Control waiting ASCD
1
HPS1 - Compressor Lock out
HPS2 - Compressor Lock out
LPS1 - Compressor Lock out
LPS2 - Compressor Lock out
FS1 - Compressor Lock out
FS2 - Compressor Lock out
Ignition Control Locked Out/
Ignition Control Failure / Limit Switch Trip / No
Jumper Plug in Heat Section
Compressors Locked Out On Low
Outdoor Air Temperature
1
Compressors Locked Out Because The
Economizer Is Using Free Cooling 1
Fan Overload Switch Trip
Compressor Held Off Due To Low Voltage1
EEPROM Storage Failure (Control Failure)
No Power or Control Failure
1.
These flash codes do not represent alarms.
All forms referenced in this instruction may be ordered from:
Standard Register
Tel: (877) 318-9675
Fax: (877) 379-7920
Unitary Products Group 51
Subject to change without notice. Printed in U.S.A.
Copyright © by Unitary Products Group 2003. All rights reserved.
Unitary
Products
Group
035-18940-000-B-1003
Supersedes: 035-18940-000-A-0103
5005 Norman
York
Drive
OK
73069

Public link updated
The public link to your chat has been updated.
Advertisement