advertisement
INSTALLATION
INSTRUCTION
TABLE OF CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SAFETY CONSIDERATIONS . . . . . . . . . . . . . 6
NOTES CAUTIONS AND WARNINGS . . . . . . 6
APPROVALS. . . . . . . . . . . . . . . . . . . . . . . . . . 6
REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . 6
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . 7
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 7
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . 27
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
GAS FURNACE OPERATION . . . . . . . . . . . . 43
COOLING OPERATION INSTRUCTIONS . . . 46
SEQUENCE OF OPERATIONS . . . . . . . . . . . 46
NORMAL MAINTENANCE . . . . . . . . . . . . . . . 54
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . 55
COOLING OPERATIONS . . . . . . . . . . . . . . . 59
GAS FURNACE OPERATIONS . . . . . . . . . . . 62
Complete Table of Contents on following pages.
SINGLE PACKAGE AIR CONDITIONERS AND
SINGLE PACKAGE GAS/ELECTRIC UNITS
DM/DH078 THROUGH 150
(6-1/2 TO 12-1/2 TON)
(9.0 TO 11.5 EER)
DM/DH 078
090
102
120
150
Tested in accordance with:
SAVE THIS MANUAL
035-17377-000 REV A (0201)
035-17377-000 (0201) REV A
TABLE OF CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . 6
NOTES CAUTIONS AND WARNINGS . . . . . . . . . . . 6
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
PRECEDING INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 7
LIMITATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
RIGGING AND HANDLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
CLEARANCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
DUCT COVERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
CONDENSATE DRAIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
COMPRESSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
THERMOSTAT WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
POWER AND CONTROL WIRING . . . . . . . . . . . . . . . . . . . . . 16
POWER WIRING DETAIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
GAS HEAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
LP UNITS, TANKS AND PIPING . . . . . . . . . . . . . . . . . . . . . . . 26
GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
GAS CONNECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
VENT AND COMBUSTION AIR . . . . . . . . . . . . . . . . . . . . . . . 27
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
ELECTRIC HEAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
ECONOMIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
RAIN HOOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
SET POINT ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
PHASING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
SUPPLY AIR INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . 29
CHECKING SUPPLY AIR CFM . . . . . . . . . . . . . . . . . . . . . . . . 29
BLOWER ROTATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
BELT TENSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
AIR BALANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
CHECKING AIR QUANTITY . . . . . . . . . . . . . . . . . . . . . . . . . . 41
SUPPLY AIR DRIVE ADJUSTMENT . . . . . . . . . . . . . . . . . . . 42
GAS FURNACE OPERATION . . . . . . . . . . . . . . . . 43
BURNERS/ORIFICES INSPECTION/SERVICING . . . . . 43
LIGHTING THE MAIN BURNERS . . . . . . . . . . . . . . . . . 43
POST START CHECKLIST . . . . . . . . . . . . . . . . . . . . . . 44
SHUT DOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
MANIFOLD GAS PRESSURE ADJUSTMENT . . . . . . . . 44
ADJUSTMENT OF TEMPERATURE RISE . . . . . . . . . . 44
CHECKING GAS INPUT . . . . . . . . . . . . . . . . . . . . . . . . . 44
NATURAL GAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
COOLING OPERATION INSTRUCTIONS . . . . . . . 46
COOLING SYSTEM PRELIMINARY OPERATION . . . . . . . . . 46
TURN ON THE POWER TO THE UNIT . . . . . . . . . . . . . . . . . .46
POST START CHECK LIST . . . . . . . . . . . . . . . . . . . . . . . . . . .46
PROPER SYSTEM PRESSURES FOR BOTH CIRCUITS . . .46
SHUT DOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
SEQUENCE OF OPERATIONS . . . . . . . . . . . . . . . 46
OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
PROTECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
CONTINUOUS BLOWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
INTERMITTENT BLOWER . . . . . . . . . . . . . . . . . . . . . . . . . . .47
COOLING SEQUENCE OF OPERATION . . . . . . . . . . . . . . . .47
COOLING OPERATION ERRORS . . . . . . . . . . . . . . . . . . . . .47
HIGH-PRESSURE LIMIT SWITCH . . . . . . . . . . . . . . . . . . . . .47
LOW-PRESSURE LIMIT SWITCH . . . . . . . . . . . . . . . . . . . . . .47
FREEZESTAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
FLASH CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
GAS HEATING SEQUENCE OF OPERATIONS . . . . . . . . . . .48
IGNITION CONTROL BOARD . . . . . . . . . . . . . . . . . . . . . . . . .48
FIRST STAGE OF HEATING . . . . . . . . . . . . . . . . . . . . . . . . . .48
SECOND STAGE OF HEATING . . . . . . . . . . . . . . . . . . . . . . .48
RETRY OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
RECYCLE OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
GAS HEATING OPERATION FAULTS . . . . . . . . . . . . . . . . . .48
LOCK-OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
TEMPERATURE LIMIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
FLAME SENSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
GAS VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
PRESSURE SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
ROLLOUT SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
INTERNAL MICROPROCESSOR FAILURE . . . . . . . . . . . . . .49
LOW AMBIENT COOLING . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
NORMAL MAINTENANCE . . . . . . . . . . . . . . . . . . . 54
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
MOTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
OUTDOOR COIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
GAS FURNACE UNITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
BURNER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
BURNER CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
COMBUSTION AIR DISCHARGE . . . . . . . . . . . . . . . . . . . . . .54
CLEANING FLUE PASSAGES & HEATING ELEMENTS . . . .54
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . 55
PREDATOR™ FLASH CODES . . . . . . . . . . . . . . . . . . . . . . .55
COOLING OPERATIONS . . . . . . . . . . . . . . . . . . . . 59
GAS FURNACE OPERATIONS . . . . . . . . . . . . . . . . . . . . . . . .62
2 Unitary Products Group
035-17377-000 REV A (0201)
LIST OF FIGURES
# PG. #
1 UNIT SHIPPING BRACKET . . . . . . . . . . . . . . . . . 7
2 CONDENSER COVERING . . . . . . . . . . . . . . . . . 7
3 COMPRESSOR SECTION . . . . . . . . . . . . . . . . . 7
4 PREDATOR™ COMPONENT LOCATION . . . . . 8
5 UNIT 4 POINT LOAD . . . . . . . . . . . . . . . . . . . . . . 9
6 UNIT 6 POINT LOAD . . . . . . . . . . . . . . . . . . . . 10
7 UNIT CENTER OF GRAVITY . . . . . . . . . . . . . . . 10
8 UNIT DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . 12
9 BOTTOM DUCT OPENINGS
(FROM ABOVE) . . . . . . . . . . . . . . . . . . . . . . . . . 13
10 REAR DUCT DIMENSIONS . . . . . . . . . . . . . . . 14
11 PREDATOR™ ROOF CURB DIMENSIONS . . . 15
12 SUNLINE™ TO PREDATOR™ TRANSITION
ROOF CURBS . . . . . . . . . . . . . . . . . . . . . . . . . . 15
# PG. #
13 CONDENSATE DRAIN . . . . . . . . . . . . . . . . . . .16
14 ELECTRONIC THERMOSTAT FIELD
WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
15 FIELD WIRING 24 VOLT THERMOSTAT . . . . .18
16 FIELD WIRING DISCONNECT . . . . . . . . . . . . .19
17 SIDE ENTRY GAS PIPING . . . . . . . . . . . . . . . .26
18 BOTTOM ENTRY GAS PIPING . . . . . . . . . . . . .26
19 ENTHALPY SET POINT CHART . . . . . . . . . . . .28
20 BELT ADJUSTMENT . . . . . . . . . . . . . . . . . . . . .30
21 TYPICAL FLAME . . . . . . . . . . . . . . . . . . . . . . . .43
22 TYPICAL GAS VALVE . . . . . . . . . . . . . . . . . . . .43
23 BASIC TROUBLESHOOTING
FLOWCHART . . . . . . . . . . . . . . . . . . . . . . . . . .56
24 POWER ON FLOW CHART . . . . . . . . . . . . . . .56
25 TRIP FAILURE FLOW CHART . . . . . . . . . . . . .57
#
LIST OF TABLES
PG. #
1 PRODUCT NOMENCLATURE . . . . . . . . . . . . . . . 5
#
13 ELECTRICAL DATA 6-1/2 TON - HIGH
EFFICIENCY . . . . . . . . . . . . . . . . . . . . . . . . . . .20
2 AIRFLOW ABBREVIATIONS . . . . . . . . . . . . . . . . 5
PG. #
3 INSTALLATION ABBREVIATIONS . . . . . . . . . . . 5
14 ELECTRICAL DATA 7-1/2 TON - STANDARD
EFFICIENCY . . . . . . . . . . . . . . . . . . . . . . . . . . .20
4 ADDITIONAL OPTIONS ABBREVIATIONS . . . . . 5
5 UNIT VOLTAGE LIMITATIONS . . . . . . . . . . . . . . 8
15 ELECTRICAL DATA 7-1/2 TON - HIGH
EFFICIENCY . . . . . . . . . . . . . . . . . . . . . . . . . . .21
6 UNIT TEMPERATURE LIMITATIONS . . . . . . . . . 9
16 ELECTRICAL DATA 8-1/2 TON - STANDARD
EFFICIENCY . . . . . . . . . . . . . . . . . . . . . . . . . . .21
7 UNIT WEIGHTS . . . . . . . . . . . . . . . . . . . . . . . . . . 9
8 4 POINT LOAD WEIGHT . . . . . . . . . . . . . . . . . . 10
17 ELECTRICAL DATA 8-1/2 TON - HIGH
EFFICIENCY . . . . . . . . . . . . . . . . . . . . . . . . . . .22
9 6 POINT LOAD WEIGHT . . . . . . . . . . . . . . . . . . 10
10 UNIT CLEARANCES . . . . . . . . . . . . . . . . . . . . . 12
11 CONTROL WIRE SIZES . . . . . . . . . . . . . . . . . . 16
12 ELECTRICAL DATA 6-1/2 TON - STANDARD
EFFICIENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
18 ELECTRICAL DATA 10 TON - STANDARD
EFFICIENCY . . . . . . . . . . . . . . . . . . . . . . . . . . .22
19 ELECTRICAL DATA 10 TON - HIGH
EFFICIENCY . . . . . . . . . . . . . . . . . . . . . . . . . . .23
20 ELECTRICAL DATA 12-1/2 TON - STANDARD
EFFICIENCY . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Unitary Products Group 3
035-17377-000 (0201) REV A
#
LIST OF TABLES (CONTINUED)
PG. #
21 ELECTRICAL DATA 12-1/2 TON - HIGH
EFFICIENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
#
41 8-1/2 TON STANDARD MOTOR SIDE SHOT
PG. #
BLOWER PERFORMANCE . . . . . . . . . . . . . . 38
22 PHYSICAL DATA . . . . . . . . . . . . . . . . . . . . . . . 24
23 GAS HEAT LIMIT SETTINGS . . . . . . . . . . . . . . 26
24 GAS PIPE SIZING - CAPACITY OF PIPE . . . . 27
25 ACCESSORY STATIC RESISTANCE . . . . . . . 29
42 8-1/2 TON OPTIONAL MOTOR SIDE SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . . 38
43 10 TON STANDARD MOTOR SIDE SHOT BLOW-
ER PERFORMANCE . . . . . . . . . . . . . . . . . . . . . 39
26 SUPPLY AIR LIMITATIONS . . . . . . . . . . . . . . . 29
27 6-1/2 TON STANDARD MOTOR DOWN
SHOT BLOWER PERFORMANCE . . . . . . . . . . 31
44 10 TON OPTIONAL MOTOR SIDE SHOT BLOW-
ER PERFORMANCE . . . . . . . . . . . . . . . . . . . . . 39
45 12-1/2 TON STANDARD MOTOR SIDE SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . . 40
28 6-1/2 TON OPTIONAL MOTOR DOWN SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . . 31
29 7-1/2 TON STANDARD MOTOR DOWN SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . . 32
46 12-1/2 TON OPTIONAL MOTOR SIDE SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . . 40
47 INDOOR BLOWER SPECIFICATIONS . . . . . . . 41
48 MOTOR SHEAVE DATUM DIAMETERS . . . . . 42
30 7-1/2 TON OPTIONAL MOTOR DOWN SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . . 32
31 8-1/2 TON STANDARD MOTOR DOWN SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . . 33
49 GAS APPLICATION . . . . . . . . . . . . . . . . . . . . . 43
50 GAS HEAT STAGES . . . . . . . . . . . . . . . . . . . . . 45
32 8-1/2 TON OPTIONAL MOTOR DOWN SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . . 33
33 10 TON STANDARD MOTOR DOWN SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . . 34
34 10 TON OPTIONAL MOTOR DOWN SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . . 34
35 12-1/2 TON STANDARD MOTOR DOWN SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . . 35
36 12-1/2 TON OPTIONAL MOTOR DOWN SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . . 35
37 6-1/2 TON STANDARD MOTOR SIDE SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . . 36
38 6-1/2 TON OPTIONAL MOTOR SIDE SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . . 36
39 7-1/2 TON STANDARD MOTOR SIDE SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . . 37
51 GAS RATE CUBIC FEET PER HOUR . . . . . . . 45
52 6.5 TON STANDARD EFFICIENCY
SUPERHEAT CHARGING . . . . . . . . . . . . . . . . 50
53 7.5 TON STANDARD EFFICIENCY
SUPERHEAT CHARGING . . . . . . . . . . . . . . . . 50
54 8.5 TON STANDARD EFFICIENCY
SUPERHEAT CHARGING . . . . . . . . . . . . . . . . 51
55 10 TON STANDARD EFFICIENCY
SUPERHEAT CHARGING . . . . . . . . . . . . . . . . 51
56 12.5 TON STANDARD EFFICIENCY
SUPERHEAT CHARGING . . . . . . . . . . . . . . . . 52
57 6.5 TON HIGH EFFICIENCY SUPERHEAT
CHARGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
58 7.5 TON HIGH EFFICIENCY SUPERHEAT
CHARGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
59 12.5 TON HIGH EFFICIENCY SUPERHEAT
CHARGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
40 7-1/2 TON OPTIONAL MOTOR SIDE SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . . 37
60 UNIT CONTROL BOARD FLASH CODES . . . . 55
61 IGNITION CONTROL FLASH CODES . . . . . . . 55
4 Unitary Products Group
035-17377-000 REV A (0201)
D H 120 N 15 A 2 A AA 1 A
TABLE 1: PRODUCT NOMENCLATURE
Model #
Model Number
Description
D
H
120
N
Product Category
Product Identifier
Nominal Cooling Capacity
MBH
Heat Type
Options
D = Air Conditioner, Single Package
M = Standard Efficiency H = High Efficiency
078 = 6-1/2 Ton
090 = 7-1/2 Ton
C = Cooling Only
102 = 8-1/2 Ton
120= 10 Ton
150 = 12-1/2 Ton
N = Natural Gas, Aluminized Steel S = Natural Gas, Stainless Steel
15
Nominal Heating
Capacity
*
00 = No Heat Installed
10 = 100 MBH Output Gas Heat
15 = 150 MBH Output Gas Heat 20 = 200 MBH Output Gas Heat
A
2
A
AA
1
A
Airflow
Voltage
Installation Options
Additional Options
Product Generation
Product Style
A = SM
B = SM/EC/BR
C = SM/EC/PE
2 = 208/230-3-60
A= None
B = 1
C = 2
D = 1 & 2E = 3
F = 4
AA = None
AB = PM
AC = CG
AD = DFS
AE = PM & CG
AF = PM & DFS
AG = CG & DFS
AH = PM, CG & DFS
NA = NC
NB = NC & PM
1 = First Generation
A = Style A
D = SM/MD
N = High Static Motor
P = High Static Motor/EC/BR
4 = 460-3-60
G = 1 & 3
H = 1 & 4
J = 1, 2 & 3
K = 1, 2 & 4
L = 1, 3 & 4
NC = NC & CG
ND = NC & DFS
NE = NC, PM & CG
NF = NC, PM & DFS
NG = NC, CG & DFS
NH = NC, PM, CG & DFS
NJ = NC, TCC & PM
NK = NC, TCC & CG
NL = NC, TCC & DFS
NM = NC, TCC, PM & CG
Q = High Static Motor/EC/PE
R = High Static Motor/MD
5 = 575-3-60
M = 1, 2, 3 & 4
N = 2 & 3
P = 2 & 4
Q = 2, 3 & 4
R = 3 & 4
NN = NC, TCC, PM & DFS
NP = NC, TCC, CG & DFS
TA = TCC
TB = TCC & PM
TC = TCC & CG
TD = TCC & DFS
TE = TCC, PM & CG
TF = TCC, PM & DFS
TG = TCC, CG & DFS
TH = TCC, PM, CG & DFS
*.
See Table 49 for the heating options available for each unit.
TABLE 2: AIRFLOW ABBREVIATIONS
ABBREVIATION MEANING
BR Barometric Relief
Economizer EC
MD
PE
SM
Motorized Damper
Power Exhaust
Standard Motor
TABLE 4: ADDITIONAL OPTIONS ABBREVIATIONS
ABBREVIATION MEANING
CG Coil Guard
DFS
NC
PM
TCC
Dirty Filter Switch
Novar
®
Controller
Phase Monitor
Technicoat Condenser Coil
TABLE 3: INSTALLATION ABBREVIATIONS
ABBREVIATION MEANING
1 Disconnect
Convenience Outlet 2
3
4
Smoke Detector Supply Air
Smoke Detector Return Air
Unitary Products Group 5
035-17377-000 (0201) REV A
If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life.
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 a.
Do not try to light any appliance.
b.
Do not touch any electrical switch; do not use any phone in your building.
c.
Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
d.
If you cannot reach your gas supplier, call the fire department.
Installation and service must be performed by a qualified installer, service agency or the gas supplier.
GENERAL
YORK
Predator units are single package air conditioners with optional gas heating designed for outdoor installation on a rooftop or slab and for non-residential use. These units can be equipped with field installed electric heaters for heating applications.
These 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 supply (where applicable), and duct connections. The electric heaters have nickel-chrome elements and utilize single-point power connection.
SAFETY CONSIDERATIONS
Should overheating occur, or the gas supply fail to shut off, shut off the manual gas valve to the furnace before shutting off the electrical supply.
Do not use this furnace if any part has been under water. Immediately call a qualified service technician to inspect the furnace and to replace any part of the control system and any gas control which has been under water.
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, or service this equipment. Untrained personnel can perform basic maintenance functions of cleaning coils and filters and replacing filters.
Observe all precautions in the literature, labels, and tags accompanying the equipment whenever working on air conditioning equipment. Be sure to follow all other applicable safety precautions and codes including ANSI Z223.1 - latest edition. Wear safety glasses and work gloves. Use quenching cloth and have a fire extinguisher available during brazing operations.
NOTES CAUTIONS AND WARNINGS
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.
APPROVALS
Design certified by CSA as follows:
1.
For use as a cooling only unit, cooling unit with supplemental electric heat or a forced air furnace.
2.
For outdoor installation only.
3.
For installation on combustible material and may be installed directly on combustible flooring or, in the U.S., on wood flooring or Class A, Class B or Class C roof covering materials.
4.
For use with natural gas (convertible to LP with kit).
REFERENCE
Additional information is available in the following reference forms:
• - Technical Guide
• - General Installation
• - Pre-start & Post-start Check List
• - Economizer Accessory
• - Motorized Outdoor Air Damper
• - Manual Outdoor Air Damper (0-100%)
• - Manual Outdoor Air Damper (0-35%)
• - Gas Heat Propane Conversion Kit
• - Gas Heat High Altitude Kit (Natural Gas)
• - Gas Heat High Altitude Kit (Propane)
• - –60 ° F Gas Heat Kit
• - Electric Heater Accessory
• - Low Ambient Accessory
• - Unit Renewal Parts List
6 Unitary Products Group
035-17377-000 REV A (0201)
All forms referenced in this instruction may be ordered from:
Standard Register
2101 West Tecumseh Road
Norman, OK 73069
Toll Free Fax: (877) 379-7920
Toll Free Phone: (877) 318-9675
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.
This product must be installed in strict compliance with the enclosed installation instructions and any applicable local, state and national codes including, but not limited to, building, electrical, and mechanical codes.
The furnace and its individual shut-off valve must be disconnected from the gas supply piping system during any pressure testing at pressures in excess of 1/2 PSIG.
Pressures greater than 1/2 PSIG will cause gas valve damage resulting in a hazardous condition.
If it is subjected to a pressure greater than 1/2
PSIG, the gas valve must be replaced.
The furnace must be isolated from the gas supply piping system by closing its individual manual shut-off valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 PSIG
This furnace is not to be used for temporary heating of buildings or structures under construction.
Before performing service or maintenance operations on unit, turn off main power switch to unit.
Electrical shock could cause personal injury.
Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage. Refer to this manual. For assistance or additional information consult a qualified installer, service agency or the gas supplier.
Condenser
Coil External
Protective
Covering
INSTALLATION
PRECEDING INSTALLATION
1.
Remove the two screws holding the brackets in the front, rear and compressor side fork-lift slots.
Barometric
Relief Hood in
Shipping Location (if included)
FIGURE 2 : CONDENSER COVERING
Bracket
Screws Turn down
FIGURE 1 : UNIT SHIPPING BRACKET
2.
Turn each bracket toward the ground and the protective plywood covering will drop to the ground.
3.
Remove the condenser coil external protective covering prior to operation.
4.
Remove the toolless doorknobs and instruction packet prior to installation. Installation
Instruction
Packet
FIGURE 3 : COMPRESSOR SECTION
These units must be installed in accordance with the following:
LIMITATIONS
Toolless
Doorknobs
Unitary Products Group 7
035-17377-000 (0201) REV A
Terminal Block for Hi-Voltage
Connection
Control Board w/ Screw
Connector for T-stat Wiring
Disconnect Location
(Optional Disconnect Switch)
Filter Access
(2” Filters)
Filter-Drier (Solid Core)
Condenser
Section
Second model nameplate inside hinged access panel
Belt-Drive
Blower Motor
Dual stage cooling for maximum comfort
Compressor
#2 Access
(High-Eff
Compressor w/ crankcase heater)
Slide-out motor and blower assembly for easy adjustment and service
Power Ventor Motor
Base Rails w/ Forklift
Slots (3 Sides) & Lifting
Holes
Roof curbs in eight- and fourteen-inch heights. Rood curbs for transitioning form
Sunline footprint to the
DM/DH Series footprint are also available (fieldinstalled accessory)
Tool-less door latch
Side entry power and control wiring knockouts
Slide-Out Drain
Pan w/ Steel 3/4”
FPT Connection
Compressor #1 Access (High-Eff
Compressor w/ crankcase heater)
Two-stage gas heating to maintain warm, comfortable temperature
Intelligent control board for safe and efficient operation
FIGURE 4 : PREDATOR™ COMPONENT LOCATION
In U.S.A.:
1.
National Electrical Code, ANSI/NFPA No. 70 - Latest
Edition
2.
National Fuel Gas Code, ANSI Z223.1 - Latest Edition,
3.
Gas-Fired Central Furnace Standard, ANSI Z21.47 - Latest Edition
4.
Local building codes, and
5.
Local gas utility requirements.
In Canada:
1.
Canadian Electrical Code, CSA C22.1,
2.
Installation Codes, CSA - B149,
3.
Local plumbing and waste water codes, and
4.
Other applicable local codes.
Refer to Tables 5 & 6 for unit application data.
After installation, gas fired units 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 customer’s expense.
Size of unit for proposed installation should be based on heat loss/heat gain calculation made according to the methods of
Air Conditioning Contractors of America (ACCA).
TABLE 5: UNIT VOLTAGE LIMITATIONS
Power Rating
* Minimum Maximum
208/230-3-60
460-3-60
575-3-60
187
432
540
252
504
630
*.
Utilization range “A” in accordance with ARI Standard 110.
8 Unitary Products Group
035-17377-000 REV A (0201)
TABLE 6: UNIT TEMPERATURE LIMITATIONS
Min.
Max.
Temperature
Wet Bulb Temperature ( ° F) of Air on
Evaporator Coil
Dry Bulb Temperature ( ° F) of Air on
Condenser Coil
57
0
*
72
125
*.
A low ambient accessory is available for operation down to -20°F.
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.
Where a choice of location is possible, position the unit on either north or east side of building.
3.
Suitable for mounting on roof curb.
4.
Roof structures must be able to support the weight of the unit and its options/accessories. Unit must be installed on a solid, level roof curb or appropriate angle iron frame.
5.
Maintain level tolerance to 1/2” across the entire width and length of unit.
RIGGING AND HANDLING
Exercise care when moving the unit. Do not remove any packaging until the unit is near the place of installation. Rig the unit by attaching chain or cable slings to the lifting holes provided in the base rails. Spreader bars, whose length exceeds the largest dimension across the unit, MUST be used across the top of the unit.
If a unit is to be installed on a roof curb other than a YORK roof curb, gasketing must be applied to all surfaces that come in contact with the unit underside.
Before lifting, make sure the unit weight is distributed equally on the rigging cables so it will lift evenly.
Units may be moved or lifted with a forklift. Slotted openings in the base rails are provided for this purpose.
Length of forks must be a minimum of 60 inches.
All panels must be secured in place when the unit is lifted.
The condenser coils should be protected from rigging cable damage with plywood or other suitable material.
FIGURE 5 : UNIT 4 POINT LOAD
TABLE 7: UNIT WEIGHTS
Model Shipping Weight * (lb.) Operating Weight † (lb.)
1045 1041 DM078
DM090
DM102
DM120
DM150
DH078
DH090
DH102
DH120
DH150
Econ.
w/ PE
Elec. Heat
2
1056
1089
1121
1200
1104
1108
1178
1212
1202
85
150
49
1051
1084
1116
1195
1099
1103
1173
1207
1197
84
148
49
*.
†.
Weights include largest gas heat option.
54kW heater.
Unitary Products Group 9
035-17377-000 (0201) REV A
TABLE 8: 4 POINT LOAD WEIGHT
Location (lbs.)
*
Model
A B C
DM078
DM090
DM102
DM120
DM150
DH078
DH090
DH102
DH120
DH150
228
230
238
245
262
241
242
257
265
263
*.
Weights include largest gas heat option.
195
197
203
209
224
206
207
220
226
224
285
287
296
305
327
300
301
321
330
327
TABLE 9: 6 POINT LOAD WEIGHT
Location (lbs.)
*
Model
A B C D
DM078
DM090
DM102
DM120
DM150
DH078
DH090
DH102
DH120
DH150
156
158
163
168
180
165
166
176
181
180
140
142
146
151
161
148
149
158
163
161
*.
Weights include largest gas heat option.
127
128
132
136
145
134
134
143
147
146
185
187
192
198
212
195
196
208
214
213
E
205
207
213
219
235
216
217
231
237
235
F
228
230
237
244
262
241
242
257
264
262
D
333
336
347
357
382
352
353
375
386
383
FIGURE 6 : UNIT 6 POINT LOAD
of Air for Combustion and Ventilation of the National Fuel Gas
Code, ANSI Z223.1 – Latest Edition, or Sections 7.2, 7.3, or
7.4 of Installation Codes, CSA-B149 - Latest Edition, and/or applicable provisions of the local building codes. Refer to
Table 10 for clearances required for combustible construction, servicing, and proper unit operation .
Do not permit overhanging structures or shrubs to obstruct condenser air discharge outlet, combustion air inlet or vent outlets.
FIGURE 7 : UNIT CENTER OF GRAVITY
CLEARANCES
All units require particular clearances for proper operation and service. Installer must make provisions for adequate combustion and ventilation air in accordance with section 5.3
10 Unitary Products Group
Excessive exposure to contaminated combustion air will result in safety and performance related problems. To maintain combustion air quality, the recommended source of combustion air is the outdoor air supply. The outdoor air supplied for combustion should be free from contaminants due to chemical exposure that may be present from the following sources.
• Commercial buildings
• Indoor pools
• Laundry rooms
• Hobby or craft rooms
• Chemical storage areas
The following substances should be avoided to maintain outdoor combustion air quality.
• Permanent wave solutions
• Chlorinated waxes and cleaners
• Chlorine based swimming pool cleaners
• Water softening chemicals
• De-icing salts or chemicals
• Carbon tetrachloride
• Halogen type refrigerants
• Cleaning solvents (such as perchloroethylene)
• Printing inks, paint removers, varnishes, etc.
• Hydrochloric acid
• Cements and glues
• Anti-static fabric softeners for clothes dryers
• Masonry acid washing materials
035-17377-000 REV A (0201)
Unitary Products Group 11
035-17377-000 (0201) REV A
30-11/32
50-3/4
4-1/4
Power
Entry
Ø 2-1/2
LEFT
59
30-3/16
17-3/16
24-3/16 6-3/16
Control
Entry
Ø 7/8
Power
Entry
Ø 2-1/2
Convenience
Power
Outlet
Entry
Ø 7/8
27
For Drain
Dimensions
See Detail C
89
FRONT
See Detail
A
11-1/2
For Baserail
Dimensions
See Detail B
FIGURE 8 : UNIT DIMENSIONS
DETAIL A
DETAIL B
TABLE 10: UNIT CLEARANCES
Top
*
Front
†
72”
36”
Right
Left
Rear
‡
36” Bottom
**
*.
†.
‡.
**.
Units must be installed outdoors. Overhanging structure or shrubs should not obstruct condenser air discharge outlet.
The products of combustion must not be allowed to accumulate within a confined space and re-circulate.
To remove the slide-out drain pan, a rear clearance of sixty inches is required. If space is unavailable, the drain pan can be removed through the front by separating the corner wall.
Units may be installed on combustible floors made from wood or class A, B or C roof covering materials.
12”
36”
0”
NOTE: A one-inch clearance must be provided between any combustible material and the supply ductwork for a distance of 3 feet from the unit.
DETAIL C
.
NOTE: If the unit includes gas heating, locate the unit so the flue exhaust is 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, four (4) horizontal feet from, or one
(1) foot above any door or gravity air inlet into the building.
• Four (4) feet from electric meters, gas meters, regulators, and relief equipment.
12 Unitary Products Group
035-17377-000 REV A (0201)
FIGURE 9 : BOTTOM DUCT OPENINGS (FROM ABOVE)
Unitary Products Group 13
035-17377-000 (0201) REV A
FIGURE 10 : REAR DUCT DIMENSIONS
DUCTWORK
Ductwork should be designed and sized according to the methods in Manual D of the Air Conditioning Contractors of
America (ACCA) or as recommended by any other recognized authority such as ASHRAE or SMACNA.
A closed return duct system should be used. This will 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 pressure requirements of the job.
14 Unitary Products Group
035-17377-000 REV A (0201)
FIGURE 11 : PREDATOR™ ROOF CURB DIMENSIONS
FIGURE 12 : SUNLINE™ TO PREDATOR™ TRANSITION ROOF CURBS
They should NOT be sized to match the dimensions of the duct connections on the unit.
DUCT COVERS
Refer to Figure 9 for bottom air duct openings. Refer to Figure 10 for side air duct openings.
Units are shipped with the side duct openings covered. For bottom duct application, no duct cover changes are necessary. For side duct application, remove the side duct covers and install over the bottom duct openings.
Unitary Products Group 15
035-17377-000 (0201) REV A
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 water-proofed.
CONDENSATE DRAIN
The side condensate drain is reversible and maybe re-oriented to the rear of the cabinet to facilitate condensate piping. A condensate drain connection is available through the base pan for piping inside the roof curb. Trap the connection per Figure 13. The trap and drain lines should be protected from freezing.
Plumbing must conform to local codes. Use a sealing compound on male pipe threads. Install condensate drain line from the 3/4 inch NPT female connection on the unit to an open drain.
FIGURE 13 : CONDENSATE DRAIN
COMPRESSORS
The compressors are mounted on elastomer insulators. The mounting bolts have been fully tightened for shipping. Do not loosen the compressor mounting bolts.
FILTERS
Two-inch filters are supplied with each unit. One-inch filters may be used with no modification to the filter racks. Filters must always be installed ahead of evaporator coil and must be kept clean or replaced with same size and type. Dirty filters reduce the capacity of the unit and result in frosted coils or safety shutdown. All units use four (4) 20”x25”x2” filters.
The unit should not be operated without filters properly
Make sure that panel latches are properly positioned on the unit to maintain an airtight seal.
THERMOSTAT WIRING
The thermostat should be located on an inside wall approximately 56 inch above the floor where it will not be subject to drafts, sun exposure or heat from electrical fixtures or appliances. Follow the manufacturer's instructions enclosed with thermostat for general installation procedure. Seven (7) color-coded, insulated wires should be used to connect the thermostat to the unit. Refer to Table 11 for control wire sizing and maximum length.
TABLE 11: CONTROL WIRE SIZES
Wire Size Maximum Length
*
18 AWG 150 Feet
*.
From the unit to the thermostat and back to the unit.
POWER AND CONTROL WIRING
Field wiring to the unit, fuses, and disconnects must conform to provisions of National Electrical Code (NEC), ANSI/NFPA
70 – Latest Edition, and/or local ordinances. The unit must be electrically grounded in accordance with NEC ANSI/NFPA
– Latest Edition and/or local codes. In Canada, the unit must conform to CSA C22.1.
Voltage tolerances which must be maintained at the compressor terminals during starting and running conditions are indicated on the unit Rating Plate and Table 5.
The internal wiring harnesses furnished with this unit are an integral part of the design certified unit. Field alteration to comply with electrical codes should not be required. 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.
A disconnect must be utilized for these units. Factory installed disconnects are available. If installing a disconnect
(field supplied or York International
supplied accessory), refer to Figure 4 for the recommended mounting location.
Avoid damage to internal components if drilling holes for disconnect mounting.
16 Unitary Products Group
035-17377-000 REV A (0201)
NOTE: Since not all local codes allow the mounting of a disconnect on the unit, please confirm compliance with local code before mounting a disconnect on the unit.
Electrical line must be sized properly to carry the load. USE
COPPER CONDUCTORS ONLY. Each unit must be wired with a separate branch circuit fed directly from the meter panel and properly fused.
Refer to Figures 14, 15 and 16 for typical field wiring and to the appropriate unit wiring diagram mounted inside control doors for control circuit and power wiring information.
POWER WIRING DETAIL
When connecting electrical power and control wiring to the unit, water-proof connectors must be used so that water or moisture cannot be drawn into the unit during normal operation. The above water-proofing conditions will also apply when installing a field supplied disconnect switch.
Units are factory wired for the voltage shown on the unit nameplate. Refer to Electrical Data Tables 12 through 21 to size power wiring, fuses, and disconnect switch.
Power wiring is brought into the unit through the side of the unit or the basepan inside the curb.
FIGURE 14 : ELECTRONIC THERMOSTAT FIELD WIRING
Unitary Products Group 17
035-17377-000 (0201) REV A
FIGURE 15 : FIELD WIRING 24 VOLT THERMOSTAT
18 Unitary Products Group
035-17377-000 REV A (0201)
FIGURE 16 : FIELD WIRING DISCONNECT
TABLE 12: ELECTRICAL DATA 6-1/2 TON - STANDARD EFFICIENCY
Voltage
Compressors OD Fan
Motors
RLA ea.
LRA ea.
FLA ea.
Blower Motor Supply
FLA
1.5 HP 2 HP
Electric Heater
208
230
460
575
14.1
14.1
7.1
5.8
110
110
54
44
1.5
1.5
0.8
0.6
6.2
6.2
3.1
2.4
8.2
8.2
4.1
3.6
Model
Numbers
None
2TP04510925
2TP04511825
2TP04512425
2TP04513625
None
2TP04510925
2TP04511825
2TP04512425
2TP04513625
None
2TP04510946
2TP04511846
2TP04512446
2TP04513646
None
2TP04510958
2TP04511858
2TP04512458
2TP04513658
Rated kW
18.0
24.0
34.0
-
9.0
18.0
24.0
34.0
-
6.8
13.5
18.0
27.0
-
9.0
-
9.0
18.0
24.0
34.0
Heater
Amps
43.3
57.7
81.8
-
10.8
21.7
28.9
40.9
-
18.7
37.5
50.0
70.8
-
21.7
-
8.7
17.3
23.1
32.7
*.
Maximum HACR breaker of the same AMP size is applicable.
Min. Circuit
Ampacity
(Amps)
Max Fuse
*
Size (Amps)
1.5 HP 2 HP 1.5 HP 2 HP
61.9
79.9
110.0
20.7
20.7
30.9
40.0
55.0
40.9
40.9
54.6
70.2
96.2
40.9
40.9
16.7
16.7
24.7
31.9
43.9
64.4
82.4
112.5
21.7
21.7
32.2
41.2
56.2
42.9
42.9
57.1
72.7
98.7
42.9
42.9
17.9
17.9
26.2
33.4
45.4
25
35
40
60
70
80
110
25
50
50
60
80
100
50
50
20
20
25
35
45
25
35
45
60
70
90
125
25
50
50
60
80
100
50
50
20
20
30
35
50
Unitary Products Group 19
035-17377-000 (0201) REV A
TABLE 13: ELECTRICAL DATA 6-1/2 TON - HIGH EFFICIENCY
Voltage
208
230
460
575
Compressors OD Fan
Motors
RLA ea.
LRA ea.
FLA ea.
14.1
14.1
6.4
5.8
110
110
54
44
1.5
1.5
0.8
0.6
Blower Motor Supply
FLA
1.5 HP
6.2
6.2
3.1
2.4
2 HP
8.2
8.2
4.1
3.6
Electric Heater
Model
Numbers
None
2TP04510925
2TP04511825
2TP04512425
2TP04513625
None
2TP04510925
2TP04511825
2TP04512425
2TP04513625
None
2TP04510946
2TP04511846
2TP04512446
2TP04513646
None
2TP04510958
2TP04511858
2TP04512458
2TP04513658
*.
Maximum HACR breaker of the same AMP size is applicable.
TABLE 14: ELECTRICAL DATA 7-1/2 TON - STANDARD EFFICIENCY
Rated kW
24.0
34.0
-
9.0
18.0
24.0
34.0
-
-
6.8
13.5
18.0
27.0
-
9.0
18.0
9.0
18.0
24.0
34.0
Heater
Amps
57.7
81.8
-
10.8
21.7
28.9
40.9
-
-
18.7
37.5
50.0
70.8
-
21.7
43.3
8.7
17.3
23.1
32.7
Blower Motor Supply
FLA
Voltage
Compressors OD Fan
Motors
RLA ea.
LRA ea.
FLA ea.
1.5 HP 2 HP
Electric Heater
208
230
460
575
14.1
14.1
7.1
5.8
110
110
64
44
1.5
1.5
0.8
0.6
6.2
6.2
3.1
2.4
8.2
8.2
4.1
3.6
Model
Numbers
None
2TP04510925
2TP04511825
2TP04512425
2TP04513625
None
2TP04510925
2TP04511825
2TP04512425
2TP04513625
None
2TP04510946
2TP04511846
2TP04512446
2TP04513646
None
2TP04510958
2TP04511858
2TP04512458
2TP04513658
Rated kW
18.0
24.0
34.0
-
9.0
18.0
24.0
34.0
-
6.8
13.5
18.0
27.0
-
9.0
-
9.0
18.0
24.0
34.0
Heater
Amps
43.3
57.7
81.8
-
10.8
21.7
28.9
40.9
-
18.7
37.5
50.0
70.8
-
21.7
-
8.7
17.3
23.1
32.7
*.
Maximum HACR breaker of the same AMP size is applicable.
Min. Circuit
Ampacity
(Amps)
Max Fuse
*
Size (Amps)
1.5 HP 2 HP 1.5 HP 2 HP
79.9
110.0
19.1
19.1
30.9
40.0
55.0
16.7
40.9
40.9
54.6
70.2
96.2
40.9
40.9
61.9
16.7
24.7
31.9
43.9
82.4
112.5
20.1
20.1
32.2
41.2
56.2
17.9
42.9
42.9
57.1
72.7
98.7
42.9
42.9
64.4
17.9
26.2
33.4
45.4
35
40
60
20
80
110
25
25
100
50
50
70
50
50
60
80
20
25
35
45
35
45
60
20
90
125
25
25
100
50
50
70
50
50
60
80
20
30
35
50
Min. Circuit
Ampacity
(Amps)
Max Fuse
*
Size (Amps)
1.5 HP 2 HP 1.5 HP 2 HP
61.9
79.9
110.0
20.7
20.7
30.9
40.0
55.0
40.9
40.9
54.6
70.2
96.2
40.9
40.9
16.7
16.7
24.7
31.9
43.9
64.4
82.4
112.5
21.7
21.7
32.2
41.2
56.2
42.9
42.9
57.1
72.7
98.7
42.9
42.9
17.9
17.9
26.2
33.4
45.4
25
35
40
60
70
80
110
25
50
50
60
80
100
50
50
20
20
25
35
45
25
35
45
60
70
90
125
25
50
50
60
80
100
50
50
20
20
30
35
50
20 Unitary Products Group
035-17377-000 REV A (0201)
TABLE 15: ELECTRICAL DATA 7-1/2 TON - HIGH EFFICIENCY
Voltage
Compressors
OD Fan
Motors
FLA ea.
Blower Motor Supply
FLA
Electric Heater
208
230
460
575
RLA ea.
14.1
14.1
7.1
5.8
LRA ea.
110
110
54
44
1.5
1.5
0.8
0.6
1.5 HP
6.2
6.2
3.1
2.4
2 HP
8.2
8.2
4.1
3.6
*.
Maximum HACR breaker of the same AMP size is applicable.
Model
Numbers
None
2TP04510925
2TP04511825
2TP04512425
2TP04513625
None
2TP04510925
2TP04511825
2TP04512425
2TP04513625
None
2TP04510946
2TP04511846
2TP04512446
2TP04513646
None
2TP04510958
2TP04511858
2TP04512458
2TP04513658
*.
Maximum HACR breaker of the same AMP size is applicable.
TABLE 16: ELECTRICAL DATA 8-1/2 TON - STANDARD EFFICIENCY
Voltage
Compressors
RLA ea.
LRA ea.
OD Fan
Motors
FLA ea.
Blower Motor Supply
FLA
2 HP 3 HP
Electric Heater
208
230
460
575
16.0
16.0
8.3
6.4
137
137
69
58
3.5
3.5
1.6
1.3
8.2
8.2
4.1
3.6
10.9
10.9
5.3
4.1
Model
Numbers
None
2TP04510925
2TP04511825
2TP04512425
2TP04513625
None
2TP04510925
2TP04511825
2TP04512425
2TP04513625
None
2TP04510946
2TP04511846
2TP04512446
2TP04513646
None
2TP04510958
2TP04511858
2TP04512458
2TP04513658
Rated kW
24.0
34.0
-
9.0
18.0
24.0
34.0
-
-
6.8
13.5
18.0
27.0
-
9.0
18.0
9.0
18.0
24.0
34.0
Heater
Amps
57.7
81.8
-
10.8
21.7
28.9
40.9
-
-
18.7
37.5
50.0
70.8
-
21.7
43.3
8.7
17.3
23.1
32.7
34.0
-
9.0
18.0
24.0
34.0
-
9.0
18.0
24.0
34.0
Rated kW
-
6.8
13.5
18.0
27.0
-
9.0
18.0
24.0
81.8
-
10.8
21.7
28.9
40.9
-
8.7
17.3
23.1
32.7
Heater
Amps
-
18.7
37.5
50.0
70.8
-
21.7
43.3
57.7
Min. Circuit
Ampacity
(Amps)
1.5 HP 2 HP 1.5 HP 2 HP
42.9
42.9
57.1
72.7
98.7
42.9
42.9
64.4
82.4
112.5
21.7
21.7
32.2
41.2
56.2
17.9
17.9
26.2
33.4
45.4
40.9
40.9
54.6
70.2
96.2
40.9
40.9
61.9
79.9
110.0
20.7
20.7
30.9
40.0
55.0
16.7
16.7
24.7
31.9
43.9
Min. Circuit
Ampacity
(Amps)
2 HP 3 HP 2 HP 3 HP
51.2
51.2
57.1
72.7
53.9
53.9
60.5
76.1
98.7
102.1
51.2
53.9
51.2
64.4
53.9
67.8
82.4
85.8
112.5
115.9
26.0
26.0
27.2
27.2
32.2
41.2
56.2
20.6
33.7
42.7
57.7
21.1
20.6
26.2
33.4
45.4
21.1
26.8
34.0
46.0
Max Fuse
*
Size (Amps)
Max Fuse
*
Size (Amps)
35
45
60
25
90
125
30
30
25
30
35
50
100
60
60
70
60
60
60
80
35
45
60
25
90
125
35
35
25
30
35
50
110
60
60
70
60
60
70
80
110
25
25
35
50
50
70
80
50
50
60
80
100
25
35
45
40
60
20
20
125
25
25
35
50
50
70
90
50
50
60
80
100
30
35
50
45
60
20
20
Unitary Products Group 21
035-17377-000 (0201) REV A
TABLE 17: ELECTRICAL DATA 8-1/2 TON - HIGH EFFICIENCY
Voltage
Compressors OD Fan
Motors
FLA ea.
Blower Motor Supply
FLA
Electric Heater
208
230
460
575
RLA ea.
14.1
14.1
7.1
5.8
LRA ea.
130
130
64
52
1.5
1.5
0.8
0.6
2 HP
8.2
8.2
4.1
3.6
3 HP
10.9
10.9
5.3
4.1
Model
Numbers
None
2TP04510925
2TP04511825
2TP04512425
2TP04513625
None
2TP04510925
2TP04511825
2TP04512425
2TP04513625
None
2TP04510946
2TP04511846
2TP04512446
2TP04513646
None
2TP04510958
2TP04511858
2TP04512458
2TP04513658
*.
Maximum HACR breaker of the same AMP size is applicable.
TABLE 18: ELECTRICAL DATA 10 TON - STANDARD EFFICIENCY
Voltage
Compressors
RLA ea.
LRA ea.
OD Fan
Motors
FLA ea.
Blower Motor Supply
FLA
2 HP 3 HP
Electric Heater
208
230
460
575
16.8
16.8
9.0
7.1
150
150
75
62
3.5
3.5
1.6
1.3
8.2
8.2
4.1
3.6
10.9
10.9
5.3
4.1
Model
Numbers
None
2TP04511825
2TP04512425
2TP04513625
2TP04515425
None
2TP04511825
2TP04512425
2TP04513625
2TP04515425
None
2TP04511846
2TP04512446
2TP04513646
2TP04515446
None
2TP04511858
2TP04512458
2TP04513658
2TP04515458
Rated kW
24.0
34.0
54.0
-
18.0
24.0
34.0
54.0
-
13.5
18.0
27.0
40.5
-
18.0
-
18.0
24.0
34.0
54.0
*.
Maximum HACR breaker of the same AMP size is applicable.
18.0
24.0
34.0
-
9.0
18.0
24.0
34.0
Rated kW
-
6.8
13.5
18.0
25.5
-
9.0
-
9.0
18.0
24.0
34.0
Heater
Amps
57.7
81.8
129.9
-
21.7
28.9
40.9
65.0
-
37.5
50.0
70.8
112.4
-
43.3
-
17.3
23.1
32.7
52.0
43.3
57.7
81.8
-
10.8
21.7
28.9
40.9
Heater
Amps
-
18.7
37.5
50.0
70.8
-
21.7
-
8.7
17.3
23.1
32.7
Min. Circuit
Ampacity
(Amps)
Max Fuse
*
Size (Amps)
2 HP 3 HP 2 HP 3 HP
42.9
42.9
57.1
72.7
45.6
45.6
60.5
76.1
98.7
102.1
42.9
45.6
42.9
64.4
45.6
67.8
82.4
85.8
112.5
115.9
21.7
21.7
22.9
22.9
32.2
41.2
56.2
17.9
33.7
42.7
57.7
18.4
17.9
26.2
33.4
45.4
18.4
26.8
34.0
46.0
35
45
60
20
90
125
25
25
20
30
35
50
100
50
50
70
50
50
60
80
35
45
60
20
90
125
25
25
20
30
35
50
110
50
50
70
50
50
70
80
Min. Circuit
Ampacity
(Amps)
2 HP
Max Fuse
*
Size (Amps)
3 HP 2 HP 3 HP
53.0
57.1
72.7
55.7
60.5
76.1
98.7
102.1
150.8
154.1
53.0
64.4
55.7
67.8
82.4
85.8
112.5
115.9
140.2
143.5
27.6
28.8
32.2
41.2
56.2
70.1
33.7
42.7
57.7
71.6
22.2
26.2
33.4
45.4
56.5
22.7
26.8
34.0
46.0
57.1
35
45
60
80
90
125
150
35
60
60
80
100
175
60
70
25
30
35
50
60
35
45
60
80
90
125
150
35
70
70
80
110
175
70
70
25
30
35
50
60
22 Unitary Products Group
035-17377-000 REV A (0201)
TABLE 19: ELECTRICAL DATA 10 TON - HIGH EFFICIENCY
Voltage
Compressors
OD Fan
Motors
FLA ea.
Blower Motor Supply
FLA
Electric Heater
208
230
460
575
RLA ea.
16.0
16.0
8.3
6.4
LRA ea.
167
167
69
58
3.5
3.5
1.6
1.3
2 HP
8.2
8.2
4.1
3.6
3 HP
10.9
10.9
5.3
4.1
*.
Maximum HACR breaker of the same AMP size is applicable.
Model
Numbers
None
2TP04511825
2TP04512425
2TP04513625
2TP04515425
None
2TP04511825
2TP04512425
2TP04513625
2TP04515425
None
2TP04511846
2TP04512446
2TP04513646
2TP04515446
None
2TP04511858
2TP04512458
2TP04513658
2TP04515458
*.
Maximum HACR breaker of the same AMP size is applicable.
TABLE 20: ELECTRICAL DATA 12-1/2 TON - STANDARD EFFICIENCY
Voltage
Compressors
RLA ea.
LRA ea.
OD Fan
Motors
FLA ea.
Blower Motor Supply
FLA
3 HP 5 HP
Electric Heater
208
230
460
575
21.8
21.8
9.6
9.0
158
158
79
65
3.5
3.5
1.6
1.3
10.9
10.9
5.3
4.1
17.3
17.3
8.6
6.8
Model
Numbers
None
2TP04511825
2TP04512425
2TP04513625
2TP04515425
None
2TP04511825
2TP04512425
2TP04513625
2TP04515425
None
2TP04511846
2TP04512446
2TP04513646
2TP04515446
None
2TP04511858
2TP04512458
2TP04513658
2TP04515458
Rated kW
34.0
54.0
-
18.0
24.0
34.0
54.0
-
-
13.5
18.0
27.0
40.5
-
18.0
24.0
18.0
24.0
34.0
54.0
Heater
Amps
81.8
129.9
-
21.7
28.9
40.9
65.0
-
-
37.5
50.0
70.8
112.4
-
43.3
57.7
17.3
23.1
32.7
52.0
54.0
-
18.0
24.0
34.0
54.0
-
18.0
24.0
34.0
54.0
Rated kW
-
13.5
18.0
27.0
40.5
-
18.0
24.0
34.0
129.9
-
21.7
28.9
40.9
65.0
-
17.3
23.1
32.7
52.0
Heater
Amps
-
37.5
50.0
70.8
112.4
-
43.3
57.7
81.8
Min. Circuit
Ampacity
(Amps)
67.0
67.0
73.4
73.4
76.1
84.1
102.1
110.1
154.1
162.1
67.0
73.4
67.8
85.8
75.8
93.8
115.9
123.9
143.5
151.5
30.1
33.7
33.4
37.8
42.7
57.7
71.6
27.0
46.8
61.9
75.7
29.7
27.0
34.0
46.0
57.1
30.2
37.4
49.4
60.5
56.2
70.1
20.6
26.2
33.4
45.4
56.5
51.2
53.9
57.1
72.7
60.5
76.1
98.7
102.1
150.8
154.1
51.2
64.4
53.9
67.8
82.4
85.8
112.5
115.9
140.2
143.5
26.0
27.2
32.2
41.2
33.7
42.7
57.7
71.6
21.1
26.8
34.0
46.0
57.1
Min. Circuit
Ampacity
(Amps)
Max Fuse
*
Size (Amps)
2 HP 3 HP 2 HP 3 HP
Max Fuse
*
Size (Amps)
3 HP 5 HP 3 HP 5 HP
45
60
80
35
125
150
35
35
35
35
50
60
80
80
80
110
175
80
80
90
50
70
80
35
125
175
40
40
35
40
50
70
90
90
90
125
175
90
90
100
60
70
90
125
150
30
35
45
60
60
80
100
175
35
50
60
60
80
25
30
60
70
90
125
150
35
35
45
60
70
80
110
175
35
50
60
60
80
25
30
Unitary Products Group 23
035-17377-000 (0201) REV A
TABLE 21: ELECTRICAL DATA 12-1/2 TON - HIGH EFFICIENCY
Voltage
Compressors
RLA ea.
LRA ea.
OD Fan
Motors
FLA ea.
Blower Motor Supply
FLA
3 HP 5 HP
Electric Heater
208
230
460
575
18.9
18.9
9.5
7.6
146
146
73
58
3.5
3.5
1.6
1.3
10.9
10.9
5.3
4.1
17.3
17.3
8.6
6.8
Model
Numbers
None
2TP04511825
2TP04512425
2TP04513625
2TP04515425
None
2TP04511825
2TP04512425
2TP04513625
2TP04515425
None
2TP04511846
2TP04512446
2TP04513646
2TP04515446
None
2TP04511858
2TP04512458
2TP04513658
2TP04515458
Rated kW
-
13.5
18.0
27.0
40.5
-
18.0
24.0
34.0
54.0
-
18.0
24.0
34.0
54.0
-
18.0
24.0
34.0
54.0
Heater
Amps
-
37.5
50.0
70.8
112.4
-
43.3
57.7
81.8
129.9
-
21.7
28.9
40.9
65.0
-
17.3
23.1
32.7
52.0
*.
Maximum HACR breaker of the same AMP size is applicable.
TABLE 22: PHYSICAL DATA
Min. Circuit
Ampacity
(Amps)
71.6
23.8
26.8
34.0
46.0
57.1
60.4
60.5
66.8
68.5
76.1
84.1
102.1
110.1
154.1
162.1
60.4
66.8
67.8
85.8
75.8
93.8
115.9
123.9
143.5
151.5
29.9
33.2
33.7
42.7
57.7
37.8
46.8
61.9
75.7
26.5
30.2
37.4
49.4
60.5
Max Fuse
*
Size (Amps)
3 HP 5 HP 3 HP 5 HP
Models
70
90
125
150
35
35
45
60
70
70
80
110
175
70
80
30
30
35
50
60
80
100
125
175
40
40
50
70
80
80
90
125
175
80
80
30
35
40
50
70
Component
078 090 102 120 150
Evaporator
Blower
Evaporator
Coil
Blower, Centrifugal (Dia. X Wd. in.)
Motor, Standard (HP)
Motor, Optional (HP)
Rows
DM
Fins per Inch
Height (in.)
Face Area (ft.
2
each)
DH
Rows
Fins per Inch
Height (in.)
Face Area (ft.
2
each)
9.9
3
15
32
10.6
15 x 15
1-1/2
2
2
15
30
10.6
3
15
32
10.6
15 x 15
1-1/2
2
2
15
32
7.9
3
15
40
13.2
15 x 15
2
3
3
15
24
13.2
4
15
40
13.2
15 x 15
2
3
2
15
40
13.2
4
15
40
13.2
15 x 15
3
5
3
15
40
24 Unitary Products Group
035-17377-000 REV A (0201)
TABLE 22: PHYSICAL DATA (CONTINUED)
Component
Condenser
Fan
(2 per Unit)
Condenser
Coil
(2 per unit)
Refrigerant
Charge
Compressors
Air Filters
DM
DH
DM
DH
DM
DH
DM
Propeller Dia. (in., each)
Motor (HP, each)
CFM, Nominal (each)
Propeller Dia. (in., each)
Motor (HP, each)
CFM, Nominal (each)
Rows (each)
Fins per Inch
Height (in. each)
Face Area (ft.
2
each)
Rows (each)
Fins per Inch
Height (in., each)
Face Area (ft.
2
each)
System 1 (lb./oz.)
System 2 (lb./oz.)
System 1 (lb./oz.)
System 2 (lb./oz.)
Quantity
Type
Quantity
DH
Type
Size (Wd. x Ht. x Thickness in.)
Number Per Unit
090
9.2
1
20
44
14.5
24
1/3
3400
24
1/3
3400
1
20
28
4/12
4/6
6/14
6/8
2
Recip
2
Recip
25x20x2
4
078
7.9
1
20
44
14.5
24
1/3
3400
24
1/3
3400
1
20
24
4/6
4/0
6/4
5/12
2
Recip
2
Recip
25x20x2
4
Models
102
11.9
2
20
44
14.5
24
3/4
4400
24
1/3
3400
1
20
36
5/0
5/4
10/0
9/8
2
Recip
2
Recip
25x20x2
4
120
14.5
2
20
44
14.5
24
3/4
4400
24
3/4
4400
1
20
44
6/12
6/12
12/0
11/0
2
Recip
2
Recip
25x20x2
4
150
14.5
2
20
44
14.5
24
3/4
4400
24
3/4
4400
2
20
44
10/12
9/8
9/14
9/4
2
Recip
2
Scroll
25x20x2
4
Unitary Products Group 25
035-17377-000 (0201) REV A
GAS HEAT
LP 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 LP gas with accessory kit model number
1NP0441.
All LP gas equipment must conform to the safety standards of the National Fire Protection Association.
For satisfactory operation, LP gas pressure must be 10.5
inch W.C. at the unit under full load. Maintaining proper gas pressure depends on three main factors:
1.
The vaporization rate which depends on the temperature of the liquid and the “wetted surface” area of the container(s).
2.
The proper pressure regulation. (Two-stage regulation is recommended).
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 LP gas suppliers.
LP gas is an excellent solvent and will quickly dissolve white lead and most standard commercial compounds. A special pipe dope must be used when assembling wrought iron or steel pipe for LP. Shellac base compounds such as Gaskolac or Stalastic, and compounds such as Rectorseal #5, Clyde’s, or John Crane may be used.
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, ANSI Z223.1 - Latest
Edition should be followed in all cases unless superseded by local codes or gas company requirements. Refer to Table 24.
The heating value of the gas may differ with locality. The value should be checked with the local gas utility. In Canada please refer to the Natural Gas and Propane Installation
Code CSA - B149.
TABLE 23: GAS HEAT LIMIT SETTINGS
*
# of HX Tubes Main Limit Setting
4
6
8
215°F
195°F
160°F
*.
Rollout = 300°F, Auxiliary Limit = 200°F
FIGURE 17 : SIDE ENTRY GAS PIPING
OPTIONAL
COIL
GUARD
SHOWN
FIGURE 18 : BOTTOM ENTRY GAS PIPING
26 Unitary Products Group
035-17377-000 REV A (0201)
TABLE 24: GAS PIPE SIZING - CAPACITY OF PIPE
Nominal Iron Pipe Size
Length of
Pipe (ft.)
3/4 in.
1 in.
1-1/4 in.
278 520 1050
50
60
70
80
10
20
30
40
90
100
190
152
130
115
105
96
90
84
79
350
285
245
215
195
180
170
160
150
730
590
500
440
400
370
350
320
305
NOTE: Maximum capacity of pipe in cubic feet of gas per hour based upon a pressure drop of 0.3 inch W.C. and 0.6
specific gravity gas.
NOTE: There may be a local gas utility requirement specifying a minimum diameter for gas piping. All units require a 3/4 inch pipe connection at the entrance fitting. Line should not be sized smaller than the entrance fitting size.
GAS CONNECTION
The gas supply line can be routed within the space and roof curb, exiting through the unit’s basepan. Refer to Figure 9 for the gas piping inlet location. Typical supply piping arrangements are shown in Figures 17 and 18. All pipe nipples, fittings, and the gas cock are field supplied or may be purchased in UPG accessory kit #1GP0404.
Gas piping recommendations:
1.
A drip leg and a ground joint union must be installed in the gas piping.
2.
Where required by local codes, a manual shut-off valve must be installed outside of the unit.
3.
Use wrought iron or steel pipe for all gas lines. Pipe dope should be applied sparingly to male threads only.
Natural gas may contain some propane. Propane is an excellent solvent and will quickly dissolve white lead and most standard commercial compounds. A special pipe dope must be used when assembling wrought iron or steel pipe. Shellac based compounds such as Gaskolac or Stalastic, and compounds such as Rectorseal #5, Clydes’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 loose particles. Before initial start-up, be sure that all 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”.
6.
A 1/8-inch NPT plugged tapping, accessible for test gage connection, must be installed immediately upstream of the gas supply connection to the unit.
7.
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.
The furnace and its individual shut-off valve must be disconnected from the gas supply piping system during any pressure testing at pressures in excess of 1/2 PSIG.
Pressures greater than 1/2 PSIG will cause gas valve damage resulting in a hazardous condition.
If it is subjected to a pressure greater than 1/2
PSIG, the gas valve must be replace.
The furnace must be isolated from the gas supply piping system by closing its individual manual shut-off valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 PSIG.
VENT AND COMBUSTION AIR
Venting slots in the heating compartment access panel remove the need for a combustion air hood. The gas heat flue exhaust is routed through factory installed exhaust piping with screen. If necessary, a flue exhaust extension may be installed at the point of installation.
ACCESSORIES
ELECTRIC HEAT
Electric heaters are available for field installation. Refer to electric heat instructions for installation. These heaters mount in the heat compartment with the heating elements extending into the supply air chamber. All electric heaters are fused and intended for use with single point power supply.
Unitary Products Group 27
035-17377-000 (0201) REV A
ECONOMIZER
The economizer can be factory or field installed. If factory installed, refer to the instructions included with the outdoor air hood to complete the assembly. Field installed economizers include complete instructions for installation.
RAIN HOOD
The following procedure should be used when assembling the economizer rain hood onto a unit. The outdoor and return air dampers, the damper actuator and gears, the outdoor and return air divider baffles, and all chosen control sensors are factory mounted as part of the economizer option.
All of the hood components, including the filters, the gasketing, and the hardware for assembling, are packaged and located between the condenser coil section and the main unit cabinet.
To assemble the rain hood:
1.
Remove the hood components, filters, gasketing, and assembly hardware from the area between the coils and main cabinet.
2.
Follow the instructions included with the hood to complete the installation.
FIGURE 19 : ENTHALPY SET POINT CHART
SET POINT ADJUSTMENT
1.
The enthalpy set point for the dampers may now be set by selecting the desired setpoint. Adjust as follows:
• For a single enthalpy carefully turn the set point adjusting screw to the “A”, “B”, “C” or “D” setting corresponding to the lettered curve.
• For a dual enthalpy carefully turn the set point adjusting screw fully clockwise past the “D” setting.
28 Unitary Products Group
035-17377-000 REV A (0201)
Extreme care must be exercised in turning both the setpoint and minimum position adjusting screws to prevent twisting them off.
2.
To check that the damper blades move smoothly without binding carefully turn the minimum position adjusting screw fully clockwise and then energize and de-energize terminals “R to “G”. With terminals “R” to “G” energized, turn the minimum position screw counterclockwise until the desired minimum position has been attained.
TABLE 25: ACCESSORY STATIC RESISTANCE
*
External Static Pressure Drop - Resistance, IWG
Description
Economizer
2250
0.03
3000
0.03
CFM
4000
0.04
5000
0.07
6000
0.09
*.
Deduct these resistance values from the available external static pressure shown in the respective Blower
Performance Table.
START-UP
PHASING
Predator 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).
SUPPLY AIR INSTRUCTIONS
CHECKING SUPPLY AIR CFM
The RPM of the supply air blower will depend on the required
CFM, the static pressure resistances of the unit accessories
(see Tables 25), and the static pressure resistance of the air duct system. With this information, the RPM for the supply air blower can be determined from the blower performance data
(see Tables 27 - 46). Table 47 provides drive information for the sheaves supplied with the unit.
The supply air CFM must be within the limitations shown in
Table 26.
BLOWER ROTATION
Check for proper supply air blower rotation. If the blower is rotating backwards, the line voltage at the unit point of power connection is misphased (See ‘PHASING.’).
TABLE 26: SUPPLY AIR LIMITATIONS
Unit Size Minimum Maximum
078
090
102
120
150
1950
2250
2550
3000
3750
3250
3750
4250
5000
6250
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.
Unitary Products Group 29
035-17377-000 (0201) REV A
BELT TENSION
The tension on the belt should be adjusted as shown in Figure 20.
Procedure for adjusting belt tension:
1. Loosen six nuts (top and bottom) A.
2. Adjust by turning (B).
3. Never loosen nuts (C).
4. Use belt tension checker to apply a perpendicular force to one belt at the midpoint of the span as shown.
Deflection distance of 4mm (5/32”) is obtained.
To determine the deflection distance from normal position, use a straight edge from sheave to sheave as reference line. The recommended deflection force is as follows:
Tension new belts at the max. deflection force recommended for the belt section. Check the belt tension at least two times during the first 24 hours of operation. Any retensioning should fall between the min. and max. deflection force values.
5. After adjusting retighten nuts (A).
FIGURE 20 : BELT ADJUSTMENT
30 Unitary Products Group
035-17377-000 REV A (0201)
TABLE 27: 6-1/2 TON STANDARD MOTOR DOWN SHOT BLOWER PERFORMANCE
* †
TURNS OPEN
**
ESP
‡
0 1
CFM W
††
-
BHP CFM W
††
-
BHP
-
CFM
2
W
†† BHP CFM
3
W
†† BHP CFM
4
W
†
†
BHP CFM
5
W
†
†
BHP
3291 1191 1.28
3096 1059 1.14
2963 948 1.02
2757 831 0.89
0.2
0.4
0.6
0.8
1.0
3168 1225 1.31
2969 1085 1.16
2658 939 1.01
2535 834 0.89
2255 718 0.77
3223 1273 1.37
2732 1084 1.16
2500 947 1.02
2110 803 0.86
1923 699 0.75
1608 596 0.64
2541 1091 1.17
2168 925 0.99
1882 793 0.85
1859 908 0.97
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
†.
Blower performance includes two-inch throwaway filters.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
††.
W = Watts
1.2
1.4
1.6
1.8
0.4
0.6
0.8
1.0
TABLE 28: 6-1/2 TON OPTIONAL MOTOR DOWN SHOT BLOWER PERFORMANCE
* †
TURNS OPEN
**
ESP
‡ 0 1 2 3 4
CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
††
5
BHP CFM W
††
-
BHP
3489 1553 1.67
-
-
-
-
-
-
3643 2150 2.31
3224 1820 1.95
2889 1569 1.68
2466 1306 1.40
2009 1071 1.15
3613 2238 2.40
3143 1917 2.06
2748 1621 1.74
2369 1385 1.49
1879 1141 1.22
-
3099 2039 2.19
2636 1711 1.83
2195 1424 1.53
2586 1833 1.97
2124 1532 1.64
-
2073 1621 1.74
-
-
-
-
-
-
-
-
-
3394 1641 1.76
3101 1407 1.51
3623 2009 2.15
3323 1742 1.87
2971 1477 1.58
2607 1241 1.33
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
†.
Blower performance includes two-inch throwaway filters.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
††.
W = Watts
Unitary Products Group 31
035-17377-000 (0201) REV A
TABLE 29: 7-1/2 TON STANDARD MOTOR DOWN SHOT BLOWER PERFORMANCE
* †
TURNS OPEN
**
ESP
‡
0.2
0.4
0.6
0.8
1.0
0
CFM W
††
1
BHP CFM W
††
2
BHP CFM W
††
3
BHP CFM W
†† BHP CFM
4
W
†
†
BHP CFM
5
W
†
†
BHP
3715 1573 1.69
3634 1434 1.54
3431 1265 1.36
3218 901 0.97
3024 976 1.05
3650 1657 1.78
3510 1490 1.60
3320 1313 1.41
3079 1145 1.23
2832 810 0.87
2586 860 0.92
3334 1522 1.63
3146 1351 1.45
2910 1169 1.25
2621 1005 1.08
2307 706 0.76
-
2903 1352 1.45
2622 1167 1.25
2404 1013 1.09
2054 858 0.92
2356 1159 1.24
-
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
†.
Blower performance includes two-inch throwaway filters.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
††.
W = Watts
1.0
1.2
1.4
1.6
0.2
0.4
0.6
0.8
TABLE 30: 7-1/2 TON OPTIONAL MOTOR DOWN SHOT BLOWER PERFORMANCE
* †
TURNS OPEN
**
ESP
‡ 0 1 2 3 4
CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
††
5
BHP CFM W
††
-
BHP
3992 1904 2.04
3798 1679 1.80
-
-
-
-
-
-
4138 2384 2.56
3623 2009 2.15
3323 1742 1.87
2971 1477 1.58
2591 1236 1.33
4126 2430 2.61
3643 2145 2.30
3224 1820 1.95
2889 1569 1.68
2466 1306 1.40
-
3613 2238 2.40
3143 1921 2.06
2748 1621 1.74
2369 1385 1.49
3099 2039 2.19
2636 1714 1.84
2195 1424 1.53
-
2586 1833 1.97
-
-
-
-
-
-
-
-
-
3930 2017 2.16
3734 1786 1.92
3486 1552 1.66
3947 2176 2.33
3670 1895 2.03
3394 1641 1.76
3084 1401 1.50
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
†.
Blower performance includes two-inch throwaway filters.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
††.
W = Watts
32 Unitary Products Group
035-17377-000 REV A (0201)
TABLE 31: 8-1/2 TON STANDARD MOTOR DOWN SHOT BLOWER PERFORMANCE
* †
TURNS OPEN
**
ESP
‡ 0 1 2 3 4
CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
††
5
BHP CFM W
††
-
BHP
4090 1816 1.95
3872 1613 1.73
3681 1448 1.55
3420 1271 1.36
3217 1125 1.21
0.2
0.4
0.6
0.8
1.0
3783 1778 1.91
3782 1685 1.81
3548 1489 1.60
3334 1325 1.42
3026 1149 1.23
2796 1010 1.08
3648 1720 1.84
3387 1529 1.64
3123 1340 1.44
2874 1176 1.26
2495 1002 1.08
-
3317 1583 1.70
2903 1354 1.45
2599 1175 1.26
2788 1385 1.49
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
†.
Blower performance includes two-inch throwaway filters.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
††.
W = Watts
1.2
1.4
1.6
1.8
0.4
0.6
0.8
1.0
TABLE 32: 8-1/2 TON OPTIONAL MOTOR DOWN SHOT BLOWER PERFORMANCE
* †
TURNS OPEN
**
ESP
‡ 0 1 2 3 4
CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
††
5
BHP CFM W
††
-
BHP
4257 2325 2.49
4117 2079 2.23
3878 1816 1.95
-
-
-
-
-
-
4317 2968 3.18
4175 2677 2.87
3803 2276 2.44
3427 1905 2.04
2987 1577 1.69
2710 1355 1.45
4243 2918 3.13
3869 2486 2.67
3451 2089 2.24
2882 1669 1.79
-
3977 2743 2.94
3408 2225 2.39
3051 1888 2.03
3518 2467 2.65
2790 1927 2.07
2604 1679 1.80
2868 2125 2.28
4363 2596 2.78
4114 2248 2.41
3876 1961 2.10
3556 1676 1.80
4323 2776 2.98
4107 2446 2.62
3838 2104 2.26
3499 1788 1.92
3166 1520 1.63
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
†.
Blower performance includes two-inch throwaway filters.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
††.
W = Watts
Unitary Products Group 33
035-17377-000 (0201) REV A
TABLE 33: 10 TON STANDARD MOTOR DOWN SHOT BLOWER PERFORMANCE
* †
TURNS OPEN
**
ESP
‡ 0 1 2 3 4
CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
††
0.2
-
5
BHP CFM W
†† BHP
3896 1639 1.76
3688 1453 1.56
3447 1268 1.36
4040 2076 2.23
4005 1934 2.07
3790 1698 1.82
3569 1508 1.62
3333 1330 1.43
3057 1147 1.23
0.4
0.6
0.8
1.0
3890 2006 2.15
3697 1790 1.92
3427 1550 1.66
3152 1356 1.45
3620 1882 2.02
3324 1629 1.75
2972 1380 1.48
3227 1708 1.83
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
†.
Blower performance includes two-inch throwaway filters.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
††.
W = Watts
TABLE 34: 10 TON OPTIONAL MOTOR DOWN SHOT BLOWER PERFORMANCE
* †
TURNS OPEN
**
ESP
‡ 0 1 2 3 4
0.4
0.6
0.8
1.0
CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
††
5
BHP CFM W
†† BHP
4965 3485 3.74
4875 3150 3.38
4613 2739 2.94
4322 2374 2.55
4156 2106 2.26
3907 1860 1.99
4876 3416 3.66
4651 2997 3.21
4359 2582 2.77
4038 2220 2.38
3860 1966 2.11
3590 1724 1.85
4713 3291 3.53
4387 2823 3.03
4077 2417 2.59
3719 2059 2.21
3541 1827 1.96
3242 1584 1.70
4476 3116 3.34
4084 2632 2.82
3768 2245 2.41
3365 1892 2.03
3197 1691 1.81
-
1.2
1.4
1.6
4165 2898 3.11
3741 2427 2.60
3432 2070 2.22
3779 2646 2.84
3359 2212 2.37
3069 1895 2.03
3319 2372 2.54
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
†.
Blower performance includes two-inch throwaway filters.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
††.
W = Watts
34 Unitary Products Group
035-17377-000 REV A (0201)
0.4
0.6
0.8
1.0
1.2
1.4
TABLE 35: 12-1/2 TON STANDARD MOTOR DOWN SHOT BLOWER PERFORMANCE
* †
TURNS OPEN
**
ESP
‡ 0 1 2 3 4
CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
††
5
BHP CFM W
†† BHP
5078 3630 3.89
4809 3103 3.33
4594 3053 3.27
4360 2478 2.66
4090 2093 2.24
3812 1798 1.93
4865 3456 3.71
4584 2961 3.17
4349 2912 3.12
4106 2318 2.49
3814 1964 2.11
4642 3284 3.52
4356 2828 3.03
4089 2776 2.98
3840 2137 2.29
-
4408 3114 3.34
4124 2705 2.90
3815 2647 2.84
4164 2947 3.16
3889 2592 2.78
-
3910 2787 2.99
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
†.
Blower performance includes two-inch throwaway filters.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
††.
W = Watts
1.4
1.6
1.8
2.0
2.2
0.6
0.8
1.0
1.2
TABLE 36: 12-1/2 TON OPTIONAL MOTOR DOWN SHOT BLOWER PERFORMANCE
* †
TURNS OPEN
**
ESP
‡ 0 1 2 3 4
CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
††
5
BHP CFM W
††
0.4
BHP
5994 5400 5.79
5565 4369 4.69
5488 4169 4.47
5264 3599 3.86
4990 3085 3.31
4738 2812 3.02
5824 5216 5.59
5368 4186 4.49
5289 3991 4.28
5049 3437 3.69
4763 2937 3.15
4491 2655 2.85
5641 5022 5.39
5170 4012 4.30
5076 3807 4.08
4822 3272 3.51
4528 2790 2.99
4235 2497 2.68
5444 4819 5.17
4971 3846 4.12
4847 3618 3.88
4584 3103 3.33
4286 2644 2.83
3969 2340 2.51
5233 4609 4.94
4771 3687 3.95
4604 3426 3.67
4335 2933 3.15
4035 2499 2.68
5009 4394 4.71
4571 3537 3.79
4346 3233 3.47
4074 2762 2.96
3777 2356 2.53
4771 4174 4.48
4370 3395 3.64
4074 3040 3.26
3802 2590 2.78
4520 3951 4.24
4169 3262 3.50
3786 2850 3.06
-
4255 3728 4.00
3966 3137 3.36
3976 3505 3.76
3763 3020 3.24
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
†.
Blower performance includes two-inch throwaway filters.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
††.
W = Watts
Unitary Products Group 35
035-17377-000 (0201) REV A
TABLE 37: 6-1/2 TON STANDARD MOTOR SIDE SHOT BLOWER PERFORMANCE
* †
TURNS OPEN
**
ESP
‡
0.4
0.6
0.8
1.0
CFM
0
W
††
1
BHP CFM W
††
2
BHP CFM W
††
3
BHP CFM W
†† BHP CFM
4
W †
†
BHP CFM
5
W †
†
BHP
-
-
-
-
-
-
3367 1216 1.30
3133 1067 1.14
2954 944 1.01
2701 819 0.88
3208 1239 1.33
2913 1068 1.15
2466 913 0.98
2350 789 0.85
1750 621 0.67
2651 1058 1.13
2317 894 0.96
1656 700 0.75
2186 998 1.07
1774 830 0.89
-
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
†.
Blower performance includes two-inch throwaway filters.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
††.
W = Watts
0.6
0.8
1.0
1.2
1.4
1.6
1.8
TABLE 38: 6-1/2 TON OPTIONAL MOTOR SIDE SHOT BLOWER PERFORMANCE
* †
TURNS OPEN
**
ESP
‡ 0 1 2 3 4
CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
††
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
3196 2077 2.23
2460 1651 1.77
1858 1318 1.41
2426 1768 1.90
-
5
BHP CFM W
††
-
BHP
3597 1598 1.71
3503 1689 1.81
3172 1430 1.53
3406 1778 1.91
3032 1497 1.61
2248 1143 1.23
3327 1866 2.00
2926 1578 1.69
2160 1217 1.31
3270 1971 2.11
2537 1544 1.66
2043 1296 1.39
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
†.
Blower performance includes two-inch throwaway filters.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
††.
W = Watts
36 Unitary Products Group
035-17377-000 REV A (0201)
TABLE 39: 7-1/2 TON STANDARD MOTOR SIDE SHOT BLOWER PERFORMANCE
* †
TURNS OPEN
**
ESP
‡
0 1
CFM W
††
-
BHP CFM W
††
-
BHP
-
CFM
2
W
†† BHP CFM
3
W
†† BHP CFM
4
W
†† BHP CFM
5
W
†
†
BHP
3736 1476 1.58
3487 1284 1.38
3231 1109 1.19
3001 970 1.04
0.4
0.6
0.8
1.0
1.2
3572 1514 1.62
3389 1339 1.44
3094 1151 1.23
2764 972 1.04
2446 824 0.88
3422 1558 1.67
3179 1364 1.46
2889 1164 1.25
2554 985 1.06
-
2891 1347 1.44
2372 1088 1.17
2050 922 0.99
2017 1051 1.13
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
†.
Blower performance includes two-inch throwaway filters.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
††.
W = Watts
TABLE 40: 7-1/2 TON OPTIONAL MOTOR SIDE SHOT BLOWER PERFORMANCE
* †
TURNS OPEN
**
ESP
‡ 0 1 2 3 4
CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
††
5
BHP CFM W
†† BHP
0.4
0.6
0.8
1.0
1.2
1.4
1.6
-
-
-
-
-
-
3196
-
-
-
-
-
-
2077
-
-
-
-
-
-
2.23
1.8
2426 1768 1.90
-
-
-
-
-
3270 1971 2.11
2537 1544 1.66
2043 1296 1.39
2460
-
-
-
-
-
-
1651
-
-
-
-
-
-
1.77
-
-
-
-
3774
3327
-
-
-
-
-
2088
1866
-
-
-
-
-
2.24
2.00
-
-
-
-
1.85
3804 1957 2.10
3503 1689 1.81
3172 1430 1.53
3406
2926
-
-
-
-
1778
1578
-
-
-
-
1.91
1.69
-
-
-
3857 1842 1.98
3597 1430 1.53
3032
2160
-
-
-
-
1497
1217
-
-
-
-
1.61
1.31
-
-
-
3910
2248
-
-
-
-
1726
1143
-
-
-
-
1.23
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
†.
Blower performance includes two-inch throwaway filters.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
††.
W = Watts
Unitary Products Group 37
035-17377-000 (0201) REV A
TABLE 41: 8-1/2 TON STANDARD MOTOR SIDE SHOT BLOWER PERFORMANCE
* †
TURNS OPEN
**
ESP
‡ 0 1 2 3 4
CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
††
0.4
-
5
BHP CFM W
†† BHP
4220 1873 2.01
3991 1659 1.78
3745 1468 1.57
3470 1283 1.38
3209 1120 1.20
3887 1729 1.85
3612 1514 1.62
3357 1330 1.43
3013 1146 1.23
2719 992 1.06
0.6
0.8
1.0
1.2
3516 1584 1.70
3219 1372 1.47
2903 2903 3.11
2343 966 1.04
3383 1614 1.73
3023 1391 1.49
2557 1161 1.25
2674 1341 1.44
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
†.
Blower performance includes two-inch throwaway filters.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
††.
W = Watts
0.8
1.0
1.2
1.4
1.6
1.8
2.0
TABLE 42: 8-1/2 TON OPTIONAL MOTOR SIDE SHOT BLOWER PERFORMANCE
* †
TURNS OPEN
**
ESP
‡ 0 1 2 3 4
0.6
CFM W
††
-
BHP CFM W
††
-
BHP CFM W
††
-
BHP CFM W
††
-
BHP CFM W
††
-
-
-
-
-
-
-
-
-
-
-
-
-
5
BHP CFM W
††
-
BHP
4068 1902 2.04
4306 2348 2.52
4036 2050 2.20
3692 1742 1.87
4323 2579 2.77
3967 2172 2.33
3632 1848 1.98
3270 1552 1.66
-
-
-
-
-
-
4211 2896 3.11
3571 2313 2.48
3003 1869 2.00
3776 2623 2.81
2591 1849 1.98
-
2674 2038 2.19
4002 2389 2.56
3613 1996 2.14
3080 1613 1.73
2564 1307 1.40
4097 2632 2.82
3691 2210 2.37
2980 1706 1.83
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
†.
Blower performance includes two-inch throwaway filters.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
††.
W = Watts
38 Unitary Products Group
035-17377-000 REV A (0201)
TABLE 43: 10 TON STANDARD MOTOR SIDE SHOT BLOWER PERFORMANCE
* †
TURNS OPEN
**
ESP
‡ 0
CFM W
††
-
1
BHP CFM W
††
-
2
BHP CFM W
††
-
3
BHP CFM W
††
4
BHP CFM W
††
5
BHP CFM W
†† BHP
4368 1843 1.98
4132 1624 1.74
3870 1423 1.53
0.2
0.4
0.6
0.8
1.0
1.2
-
-
-
-
-
-
4515 2192 2.35
4213 1885 2.02
4020 1692 1.81
3791 1491 1.60
3499 1283 1.38
4192 2027 2.17
3905 1741 1.87
3657 1537 1.65
3383 1345 1.44
3062 1149 1.23
3838 1858 1.99
3534 1591 1.71
3236 1386 1.49
2934 1202 1.29
3755 1942 2.08
3489 1695 1.82
3081 1425 1.53
-
3337 1757 1.88
2918 1475 1.58
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
†.
Blower performance includes two-inch throwaway filters.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
††.
W = Watts
TABLE 44: 10 TON OPTIONAL MOTOR SIDE SHOT BLOWER PERFORMANCE
* †
TURNS OPEN
**
ESP
‡ 0
CFM W
††
-
1
BHP CFM W
††
-
2
BHP CFM W
††
-
3
BHP CFM W
††
-
4
BHP CFM W
††
5
BHP CFM W
†† BHP
5067 2614 2.80
4809 2290 2.46
0.2
0.4
0.6
0.8
-
-
-
-
-
-
-
-
-
-
-
-
5179 3112 3.34
4884 2703 2.90
4729 2401 2.57
4459 2113 2.27
4925 2943 3.16
4585 2521 2.70
4429 2244 2.41
4137 1964 2.11
4974 3220 3.45
4607 2727 2.92
4267 2342 2.51
4099 2080 2.23
3783 1809 1.94
4975 3453 3.70
4657 2995 3.21
4305 2550 2.73
3941 2171 2.33
3751 1919 2.06
3371 1630 1.75
1.0
1.2
1.4
1.6
1.8
2.0
4679 3423 3.67
4366 2808 3.01
4022 2373 2.54
3545 1978 2.12
3305 1741 1.87
4429 3065 3.29
4040 2607 2.80
3669 2673 2.87
2918 1700 1.82
-
4107 2845 3.05
3620 2357 2.53
2931 1830 1.96
3553 2500 2.68
2756 1899 2.04
-
2439 1939 2.08
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
†.
Blower performance includes two-inch throwaway filters.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
††.
W = Watts
Unitary Products Group 39
035-17377-000 (0201) REV A
TABLE 45: 12-1/2 TON STANDARD MOTOR SIDE SHOT BLOWER PERFORMANCE
* †
TURNS OPEN
**
ESP
‡ 0 1 2 3 4
CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
††
5
BHP CFM W
†† BHP
0.4
0.6
0.8
-
-
-
-
-
-
-
-
-
-
5220
-
3395
-
3.64
5201 3162 3.39
4966 2796 3.00
4681 2405 2.58
4355 2054 2.20
4942 2980 3.20
4657 2608 2.80
1.0
5003 3490 3.74
4647 2988 3.20
4380 2636 2.83
4030 2257 2.42
4358
-
2230
-
2.39
4944 3194 3.43
4661 2806 3.01
4378 2572 2.76
4016 2057 2.21
-
4007
-
-
1890
-
-
2.03
-
-
1.2
4724 3290 3.53
4363 2875 3.08
4012 2505 2.69
1.4
4428 3040 3.26
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
†.
Blower performance includes two-inch throwaway filters.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
††.
W = Watts
TABLE 46: 12-1/2 TON OPTIONAL MOTOR SIDE SHOT BLOWER PERFORMANCE
* †
TURNS OPEN
**
ESP
‡ 0 1 2 3 4
0.4
CFM W
††
-
5
BHP
-
CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP CFM W
†† BHP
6447 5315 5.70
6207 4760 5.1046
5966 4205 4.51
5717 3716 3.98
5470 3307 3.55
0.6
0.8
-
-
-
-
-
-
6110
5772
4917
4519
5.27
4.85
5965
5741
4464
4274
4.79
4.58
5740
5503
4023
3821
4.31
4.10
5430
5162
3501
3294
3.75
3.53
5126
4849
3054
2870
3.28
3.08
1.0
6235 5521 5.92
5628 4407 4.73
5474 4048 4.34
5244 3611 3.87
4882 3101 3.33
4530 2667 2.86
1.2
5881 5137 5.51
5384 4205 4.51
5248 3854 4.13
4941 3387 3.63
4589 2906 3.12
4225 2502 2.68
1.4
5695 4950 5.31
5123 3996 4.29
5014 3670 3.94
4651 3178 3.41
4284 2716 2.91
3858 2280 2.45
1.6
5471 4728 5.07
4919 3828 4.11
4732 3460 3.71
4365 2983 3.20
3951 2516 2.70
3491 2058 2.21
1.8
5242 4514 4.84
4656 3611 3.87
4438 3240 3.47
3998 2740 2.94
3618 2316 2.48
2.0
4954 4231 4.54
4339 3380 3.62
3905 2861 3.07
3631 2497 2.68
-
-
-
-
-
-
-
2.2
2.4
4585
4217
3934
3637
4.22
3.90
2.6
3848 3340 3.58
4022
-
-
3149
-
-
3.38
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
†.
Blower performance includes two-inch throwaway filters.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
††.
W = Watts
40 Unitary Products Group
035-17377-000 REV A (0201)
NOTES FOR TABLE 27 THROUGH TABLE 46:
• Blower performance includes dry coil and two-inch filters.
• Blower performance for gas heat includes the maximum number of heat tubes available for each tonnage.
• ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
TABLE 47: INDOOR BLOWER SPECIFICATIONS
MOTOR
MODEL
MOTOR SHEAVE BLOWER SHEAVE
HP RPM Eff.
SF Frame Datum Dia. (in.) Bore (in.) Model Datum Dia. (in.) Bore (in.) Model
DM078
DH078
DM090
DH090
DM102
DH102
DM120
DH120
DM150
DH150
3
2
3
2
2
2
3
2
5
3
5
3
3
1-1/2 1725 80% 1.15
2 1725 80% 1.15
1-1/2 1725 80% 1.15
2 1725 80% 1.15
1-1/2 1725 80% 1.15
2 1725 80% 1.15
1-1/2 1725 80% 1.15
1725
1725
1725
1725
1725
1725
1725
1725
1725
1725
80%
80%
80%
80%
80%
80%
80%
80%
80%
80%
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
56
56
56
56
56
56
56
56
56
1725 87% 1.15
184T
1725 80% 1.15
56
1725 87% 1.15
184T
56
56
56
56
56
56
56
56
3.4 - 4.4
3.4 - 4.4
3.4 - 4.4
3.4 - 4.4
3.4 - 4.4
3.4 - 4.4
3.4 - 4.4
3.4 - 4.4
3.4 - 4.4
3.4 - 4.4
3.4 - 4.4
3.4 - 4.4
3.4 - 4.4
3.4 - 4.4
3.4 - 4.4
3.4 - 4.4
3.4 - 4.4
4.3 - 5.3
3.4 - 4.4
4.3 - 5.3
7.0
8.5
7.0
8.5
7.5
9.0
7.0
9.0
7.0
7.0
6.7
7.0
6.7
9.5
7.5
9.5
7.5
9.0
7.5
9.0
1VM50
1VM50
1VM50
1VM50
1VM50
1VM50
1VM50
1VM50
1VM50
1VM50
1VM50
1VM50
1VM50
1VM50
1VM50
1VM50
1VM50
1VP56
1VM50
1VP56
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
1 1/8
7/8
1 1/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
BELT
AK79
AK94
AK74
AK94
AK74
AK89
AK74
AK89
AK99
AK79
AK99
AK79
AK94
AK79
AK94
AK74
AK74
A54
A54
BK77 BX55
AK74 A54
BK77 BX55
A58
A55
A58
A55
A57
A55
A57
A55
A56
A54
A56
A54
A56
A54
A56
AIR BALANCE
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.
CHECKING AIR QUANTITY
1.
Remove the dot plugs from the duct panel (for location of the dot plugs see figure 10).
2.
Insert eight-inches of 1/4 inch metal tubing into the airflow 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.
Use an inclined manometer to determine the pressure drop across a dry evaporator coil. Since the moisture on an evaporator coil can vary greatly, measuring the pressure drop across a wet coil under field conditions could be inaccurate. To assure a dry coil, the compressors should be de-activated while the test is being run.
NOTE: De-energize the compressors before taking any test measurements to assure a dry evaporator coil.
4.
The CFM through the unit with clean 2 inch filters can be determined from the pressure drop indicated by the manometer by referring to the curves in the supplement.
5.
After readings have been obtained, remove the tubes and replace the dot plugs.
Failure to properly adjust the total system air quantity can result in extensive blower damage.
Unitary Products Group 41
035-17377-000 (0201) REV A
SUPPLY AIR DRIVE ADJUSTMENT
Before making any blower speed changes review the installation for any installation errors, leaks or undesirable systems effects that can result in loss of airflow.
Even small changes in blower speed can result in substantial changes in static pressure and BHP.
BHP and AMP draw of the blower motor will increase by the cube of the blower speed. Static pressure will increase by the square of the blower speed. Only qualified personnel should make blower speed changes, strictly adhering to the fan laws.
At unit start-up, the measured CFM may be higher or lower than the required CFM. To achieve the required CFM, the speed of the drive may have adjusted by changing the datum diameter (DD) of the variable pitch motor sheave as described below:
-------------------------------------
Measured CFM
= New DD
Use the following tables and the DD calculated per the above equation to adjust the motor variable pitch sheave.
EXAMPLE
A 10 ton unit was selected to deliver 4,000 CFM with a 5 HP motor, but the unit is delivering 3,750 CFM. The variable pitch motor sheave is set at 2 turns open.
Use the equation to determine the required DD for the new motor sheave,
---------------------------
3,750 CFM
4.0 in.
= 4.26 in.
Use Table 48 to locate the DD nearest to 4.26 in. Close the sheave to 1/2 turn open.
New BHP
= ( Speed increase )
3
• BHP at 3,750 CFM
= ( Speed increase )
3
• Original BHP
= New BHP
New motor Amps
=
(
Speed increase
) 3 •
Amps at 3,750 CFM
=
(
Speed increase
) 3 •
Orignial Amps
= New Amps
TABLE 48: MOTOR SHEAVE DATUM DIAMETERS
1VM50x7/8
(1-1/2, 2 & 3 HP Motor)
1VP56x1-1/8
(5 HP Motor)
Turns Open
2
2-1/2
3
3-1/2
0
1/2
1
1-1/2
4
4-1/2
5
Datum
Diameter
4.4
4.3
4.2
4.1
4.0
3.9
3.8
3.7
3.6
3.5
3.4
Turns Open
3
3-1/2
4
4-1/2
1
1-1/2
2
2-1/2
5
5-1/2
6
Datum
Diameter
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
4.4
4.3
42 Unitary Products Group
035-17377-000 REV A (0201)
GAS FURNACE OPERATION
This furnace is equipped with an automatic ignition system. Do not attempt to manually light the burners.
TABLE 49: GAS APPLICATION
Unit
Input (MBH)
Size Opt.
Output
(MBH)
078
090
102
120
150
10
15
15
20
10
15
10
15
15
20
120
180
180
240
120
180
120
180
180
240
96
144
144
192
96
144
96
144
144
192
Temp Rise
(
°
F)
20-50
35-65
15-45
30-60
10-40
25-55
20-50
30-60
10-40
20-50
1.
Open the union fitting just upstream of the unit gas valve and downstream from the main manual shut-off valve in the gas supply line.
2.
Remove the screws holding each end of the manifold to the manifold supports.
3.
Disconnect wiring to the gas valves and spark igniter(s).
Remove the manifold & gas valve assembly. Orifices can now be inspected and/or replaced.
To service burners, complete step 4.
4.
Remove the heat shield on top of the manifold supports.
Burners are now accessible for inspection and/or replacement.
NOTE: Reverse the above procedure to replace the assemblies.
Make sure that burners are level and seat at the rear of the gas orifice.
FIGURE 21 : TYPICAL FLAME
BURNERS/ORIFICES INSPECTION/SERVICING
Before checking or changing burners, pilot or orifices,
CLOSE MAIN MANUAL SHUT-OFF VALVE AND SHUT OFF
ALL POWER TO THE UNIT.
FIGURE 22 : TYPICAL GAS VALVE
LIGHTING THE MAIN BURNERS
1.
Turn “OFF” electric power to unit.
2.
Turn room thermostat to lowest setting.
3.
Turn gas valve counter-clockwise to “ON” position (See
Figure 19).
4.
Turn “ON” electric power to unit.
Unitary Products Group 43
035-17377-000 (0201) REV A
5.
If thermostat set temperature is above room temperature, the main burners will ignite. If a second stage of heat is called for, the main burners for second stage heat will ignite for the second stage heat.
POST START CHECKLIST
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.
2.
Check for correct manifold gas pressures. (See
‘CHECKING GAS INPUT.’)
3.
Check the supply gas pressure. It must be within the limits shown on the rating nameplate. Supply pressure should be checked with all gas appliances in the building at full fire. At no time should the standby gas pressure exceed 13 in. or the operating pressure drop below 5.3 in for natural gas units. If gas pressure is outside these limits, contact the local gas utility or propane supplier for corrective action.
SHUT DOWN
1.
Set the thermostat to the lowest temperature setting.
2.
Turn “OFF” all electric power to unit.
3.
Open gas heat access panel.
4.
Turn gas valve clockwise to “OFF” position (See Figure
22).
MANIFOLD GAS PRESSURE ADJUSTMENT
This gas furnace has two heat stages. Therefore, the gas valve has two adjustment screws located under a plastic protective cover. The second stage (100% input) adjustment screw is adjacent to the “HI” marking on the valve and the first stage (60% input) adjustment screw is located adjacent to the “LO” marking on the valve (See Figure 22).
Manifold pressure adjustment procedure.
Adjust second stage (100% input) pressure first, then adjust first stage (60% input) pressure.
1.
Turn off all power to the unit.
2.
Using the outlet pressure port on the gas valve, connect a manometer to monitor the manifold pressure.
3.
Remove plastic cap covering HI and LO pressure adjustment screws.
4.
Turn on power to the unit.
5.
Set thermostat to call for second stage heat and start furnace.
6.
If necessary, using a screwdriver, turn the second stage adjustment screw (adjacent to the “HI” marking on the valve) clockwise to increase manifold pressure or counterclockwise to decrease manifold pressure. Be sure not to over-fire the unit on second stage.
7.
After the high manifold pressure has been checked, adjust the thermostat to call for first stage heat.
8.
If necessary, using a screwdriver, turn the first stage adjustment screw (adjacent to the “LO” marking on the valve) clockwise to increase manifold pressure or counterclockwise to decrease manifold pressure. Be sure not to under-fire the unit on first stage.
9.
Once pressure has been checked, replace the plastic cap covering the HI and LO pressure adjustment screws.
NOTE: When using natural gas, the manifold pressure for second stage (100% input) should be 3.5 IWG ± 0.3. The manifold pressure for first stage (60% input) when using natural gas should be 1.5 IWG ± 0.3.
ADJUSTMENT OF TEMPERATURE RISE
The temperature rise (the difference of temperature between the return air and the heated air from the furnace) must lie within the range shown on the CSA rating plate and the data in Table 49.
After the temperature rise has been determined, the CFM can be calculated as follows:
CFM = Btu Input •
(
1.08
⋅ ∆°F )
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 6 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 (See ‘SUPPLY AIR DRIVE
ADJUSTMENT’).
NOTE: Each gas heat exchanger size has a minimum allowable CFM. Below this CFM, the limit will open below this rating.
CHECKING GAS INPUT
NATURAL GAS
This unit has two stages of gas heat. The first stage is 60% of the full fire input and is considered the minimum input for the furnace. The intended input for each furnace is shown in the table below. The following Table applies to units operating on
60 Hz power only.
44 Unitary Products Group
035-17377-000 REV A (0201)
TABLE 50: GAS HEAT STAGES
# of Burner Tubes
4
6
8
2nd Stage
Input (100%
Btuh)
120,000
180,000
240,000
1st Stage
Input (60%)
Btuh
72,000
108,000
144,000
1.
To determine the rate of gas flow (second Stage).
2.
Turn of all other gas appliances connected to the gas meter.
3.
Turn on the furnace and make sure the thermostat is calling for Second stage (100% input) heat.
4.
Measure the time needed for one revolution of the hand on the smallest dial on the meter. A typical gas meter has a 1/2 or a 1 cubic foot test dial.
5.
Using the number of seconds it takes for one revolution of the dial, calculate the cubic feet of gas consumed per hour. (See example below).
6.
If necessary, adjust the high pressure regulator as discussed in the section “Manifold Gas Pressure Adjustment”. Be sure not to over-fire the furnace on Second stage. If in doubt, it is better to leave the Second stage of the furnace slightly under-fired. Repeat Steps 1-5.
To determine the rate of gas flow (First Stage)
1.
Turn of all other gas appliances connected to the gas meter.
2.
Turn on the furnace and make sure the thermostat is calling for first stage (60% input) heat.
3.
Even when the thermostat is calling for first stage heat, the unit will light on second stage and will run on Second stage for 1 minute. Allow this one-minute time period to expire and be certain the unit is running on first stage.
4.
Measure the time needed for one revolution of the hand on the smallest dial on the meter. A typical gas meter has a 1/2 or a 1 cubic foot test dial.
5.
Using the number of seconds it takes for one revolution of the dial, calculate the cubic feet of gas consumed per hour (See example below).
6.
If necessary, adjust the low pressure regulator as discussed in the section “Manifold Gas Pressure Adjustment”. Be sure not to under-fire the furnace on first stage. If in doubt, it is better to leave the first stage of the furnace slightly over-fired (greater than 60% input).
Repeat Steps 1-6.
TABLE 51: GAS RATE CUBIC FEET PER HOUR
Seconds for One
Rev.
Size of Test Dial
1/2 cu. ft.
1 cu. ft.
10 180 360
150 300
36
38
40
42
28
30
32
34
20
22
24
26
12
14
16
18
52
54
56
58
60
44
46
48
50
129
113
100
90
82
75
69
64
60
56
53
50
47
45
43
41
39
37
36
35
34
32
31
30
257
225
200
180
164
150
138
129
120
113
106
100
95
90
86
82
78
75
72
69
67
64
62
60
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 as it varies widely from area to area).
EXAMPLE
By actual measurement, it takes 19 seconds for the hand on a 1 cubic foot dial to make a revolution with a 192,000 Btuh furnace running. To determine rotations per minute, divide 60 by 19 = 3.16. To calculate rotations per hour, multiply 3.16 •
60 = 189.6. Multiply 189.6 • 1 (0.5 if using a 1/2 cubic foot dial) = 189.6. Multiply 189.6 • (the Btu rating of the gas). For this example, assume the gas has a Btu rating of 1050
Btu/ft.
3
. The result of 199,000 Btuh is within 5% of the
192,000 Btuh rating of the furnace.
Unitary Products Group 45
035-17377-000 (0201) REV A
COOLING OPERATION INSTRUCTIONS
COOLING SYSTEM PRELIMINARY OPERATION
After installation has been completed, energize the crankcase heaters for at least four hours before operating unit. After this initial warm-up, the com-
pressors should be given three false starts (energized just long enough to make a few revolutions) with 5-7 minutes of delay between each start before being put into full time service.
NOTE: Prior to each cooling season, the crankcase heaters must be energized at least 10 hours before the system is put into operation.
TURN ON THE POWER TO THE UNIT
1.
Set the room thermostat setting to lower than the room temperature.
2.
First stage compressors will energize after the built-in time delay (five minutes).
3.
The second stage of the thermostat will energize second stage compressor if needed.
POST START CHECK LIST
VERIFY PROPER SYSTEM PRESSURES FOR BOTH CIR-
CUITS
1.
Check the unit air flower (CFM). See “CHECKING AIR
QUANTITY” on page 41.
2.
Measure the temperature drop across the evaporator coil.
3.
Check the voltage input.
4.
Measure the system Amperage draw across all legs of 3 phase power wires.
5.
Measure the condenser fan amps draw.
6.
Measure evaporator fan motor’s amp draw.
SHUT DOWN
1.
Set the thermostat to highest temperature setting.
2.
Turn off the electrical power to the unit.
SEQUENCE OF OPERATIONS
OVERVIEW
For the Predator series of 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.
SAFETY CONTROLS
ThePredator 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 405 ± 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 monitored and controlled. On any fault, only the associated system will be effected by any safety/preventive action. The other refrigerant system will continue in operation unless it is effected 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.
The ignition control board monitors the temperature limit switch, the rollout switch, the draft motor proving switch, the flame sensor, and the gas valve.
46 Unitary Products Group
035-17377-000 REV A (0201)
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.
CONTINUOUS BLOWER
By setting the room thermostat 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.
COOLING SEQUENCE OF OPERATION
When the thermostat calls for the first stage of cooling, the low-voltage control circuit from “R” to “Y1” and “G” is completed. The UCB energizes the economizer (if installed and free cooling is available) or the first available compressor * and the condenser fans. For first stage cooling, compressor
#1 is energized. If compressor #1 is unavailable, compressor
#2 is 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.
The control board energizes the first available compressor. If free cooling is being used for the first stage of cooling, compressor #1 is energized. If compressor #1 is active for first stage cooling or the first compressor is locked-out, compressor #2 is energized. In free-cooling mode, if the call for the second stage of cooling continues for 20 minutes, compressor #2 is energized, provided it has not been locked-out.
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 rush.
Once the thermostat has been satisfied, the it will de-energize Y1 and Y2. If the compressors have satisfied their minimum run times, the compressors and condenser fans are deenergized. 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.
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, 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 60). 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 deenergize 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 60). If the other compressor is inactive, the condenser fans will be de-energized.
Unitary Products Group 47
035-17377-000 (0201) REV A
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 re-energize the halted compressor.
Should a freezestat open three times within two hours of operation, the UCB will lock-out the associated compressor and flash a code (Table 60). If the other compressor is inactive, the condenser fans will be de-energized.
FLASH CODES
When the UCB has locked-out a compressor, the UCB will initiate a flash code associated with the error. Also, if the thermostat is so equipped, the UCB will energize the thermostat trouble light.
RESET
Remove the call for cooling, by raising thermostat setting higher than the space temperature. This resets any pressure or freezestat flash codes.
GAS HEATING SEQUENCE OF OPERATIONS
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 by monitoring the gas valve (GV). Once voltage has been sensed at the GV, the UCB will initiate the fan on delay for heating, energizing the indoor blower the specified delay has elapsed.
When the thermostat has been satisfied, heating calls are ceased. The GV is immediately closed. The blower is deenergized after the fan off delay for heating has elapsed. The draft motor performs a 30-second post purge.
IGNITION CONTROL BOARD
FIRST STAGE OF HEATING
When the ICB receives a call for first stage of heating, “W1,” the draft motor is energized. Once the draft motor has been proven, a 30-second purge is initiated. At the end of the purge, both main valves of the GV are opened, and the spark ignitor is energized for 10 seconds. The ICB then checks for the presence of flame. If flame is detected, the ICB enters a flame stabilization period. If flame was not detected, both main valves close, and a retry operation begins.
During the flame stabilization period, a loss of the flame for 2 seconds will cause the main valves to close and the retry operation to begin. After the flame stabilization period, a loss of flame for 3/4 second will cause the main valves to close and the retry operation to begin.
At the conclusion of the flame stabilization period, the ICB will operate the gas heat in high fire (both valves open) for an additional 100 seconds (for a total for 120 seconds of high fire operation). After this 100 seconds, the ICB will then use the call for the second stage of heat to control the second main valve of the GV.
When “W1” is satisfied, both valves are closed.
SECOND STAGE OF HEATING
When the ICB receives a call for the second stage of heating,
“W2,” the ICB conducts a complete first stage ignition sequence. If this sequence is satisfied, the second main valve of the GV is opened.
When “W2” is satisfied, the second main valve is closed.
RETRY OPERATION
When a flame is lost or is not detected during an attempt to achieve ignition, a retry operation occurs. A 30-second purge is performed between ignition attempts.
If the unit fails after three ignition attempts, the furnace is locked-out for one hour. The furnace is monitored during this one-hour period for unsafe conditions.
RECYCLE OPERATION
When a flame is lost after the flame stabilization period, a recycle operation occurs. If the unit fails after five recycle attempts, the furnace is locked-out for one hour.
GAS HEATING OPERATION FAULTS
LOCK-OUT
A one-hour lockout occurs following three retries or five recycles. During the one-hour lockout, flame detection, limit conditions, and main valves are tested. Any improper results will cause the appropriate action to occur. Recycling the low voltage power cancels the lock-out.
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 15-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.
this limit is monitored at all time.
If the temperature limit opens three times within one hour, it will lock-on the indoor blower motor and flash code is initiated
(See Table 60).
48 Unitary Products Group
035-17377-000 REV A (0201)
FLAME SENSE
Flame sensing occurs at all times. If “W1” is not present and a flame is sensed for 2 seconds, the draft motor is energized and the main valve is kept off. The ICB halts any operation until a flame is not detected. Once the flame detection is lost, the ICB performs a post-purge. Normal operation is allowed concurrently with the purge (i.e. this purge can be considered the purge associated with a call for “W1”).
If “W1” is present, a flame is sensed, but the main valve is not energized, the draft motor is energized until the flame detection is lost. Normal operation is now allowed.
The flame detection circuitry continually tests itself. If the ICB finds the flame detection circuitry to be faulty, the ICB will not permit an ignition sequence. Also, the draft motor is energized. If this failure should occur during an ignition cycle the failure is counted as a recycle.
GAS VALVE
The UCB and ICB continuously monitor the GV.
If the ICB senses voltage at the GV when not requested, the
ICB will energize the draft motor. The ICB will not operate the furnace until voltage is no longer sensed at the GV. The draft motor is stopped when voltage is not sensed at 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 lock-on the indoor blower and a flash code is initiated (Table 60).
When voltage is no longer sensed at the GV, the UCB will deenergize 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.
During a call for heat, if the UCB does not sense voltage at the GV for a continuous five-minute period the UCB will initiate a flash code (Table 60). The indoor blower motor will not be locked-on while there is no GV voltage.
However, if during a normal ignition sequence, the NPC has been tested to be open, IDM energized, NPC closes and then the first stage main valve (MV1) is detected as being on, the ignition sequence stops and the IDM is de-energized. (Since the NPC is wired serially with the main valve relays, de-energizing the IDM will open the NPC). This failure is counted as a recycle and will result in an eventual recycle lockout. If the main valve continues to be energized after the IDM is deenergized the IDM is re-energized. The second stage (MV2) main valve is not monitored for closure after energization.
PRESSURE SWITCH
Once the draft motor has been proven during a normal ignition sequence, if proving is lost for 2 seconds, the GV will be de-energized, the ignition cycle is aborted, and the ICB flashes the appropriate code. The draft motor is energized until again proven or “W1” is lost.
ROLLOUT SWITCH
The rollout switch is wired in series with the draft motor proving switch. As such, the ICB cannot distinguish the rollout switch operation from that of the draft motor proving switch.
Consequently, the control will only respond as in the same manner as outlined above (under Pressure Switch). An open rollout will inhibit the gas valve from actuating.
INTERNAL MICROPROCESSOR FAILURE
If the ICB detects an internal failure, it will turn cease all outputs, ignore inputs, and display the proper flash code for control replacement. The ICB remains in this condition until replaced.
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. 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.
Unitary Products Group 49
035-17377-000 (0201) REV A
TABLE 52: 6.5 TON STANDARD EFFICIENCY SUPERHEAT CHARGING
Superheat at Compressor Suction (°F)
Airflow = 2500 CFM
Outdoor
Temp (°F) Indoor WB Temp (°F)
55 57 59 61 63 65 67 69 71 73 75
65 21.9 22.6 23.2 23.9 24.6 25.3 26.0 27.4 28.9 30.4 31.9
70 18.1 19.1 20.0 21.0 22.0 22.9 23.9 25.5 27.2 28.9 30.5
75 14.4 15.6 16.8 18.1 19.3 20.6 21.8 23.7 25.5 27.3 29.1
80 10.6 12.1 13.7 15.2 16.7 18.2 19.8 21.8 23.8 25.8 27.8
85
90
6.8 8.7 10.5 12.3 14.1 15.9 17.7 19.9 22.1 24.2 26.4
-
95 -
100 -
6.2 8.0 9.8 11.6 13.4 15.3 17.8 20.4 23.0 25.5
-
-
105 -
110 -
115 -
-
-
-
-
-
-
-
5.7 7.7 9.7 11.7
TABLE 53: 7.5 TON STANDARD EFFICIENCY SUPERHEAT CHARGING
Superheat at Compressor Suction (°F)
Airflow = 3000 CFM
Outdoor
Temp (°F) Indoor WB Temp (°F)
55 57 59 61 63 65 67 69 71 73 75
65 10.6 13.5 16.3 19.1 22.0 24.8 27.7 29.1 30.5 32.0 33.4
70
75
8.4 11.1 13.8 16.5 19.3 22.0 24.7 26.5 28.4 30.2 32.0
6.1 8.7 11.3 13.9 16.6 19.2 21.8 24.0 26.2 28.4 30.6
80
85
90
95
-
-
-
-
6.4 8.9 11.4 13.9 16.3 18.8 21.4 24.0 26.6 29.2
-
-
-
6.4 8.8 11.1 13.5 15.9 18.9 21.9 24.8 27.8
5.8 7.9 10.1 12.2 14.3 17.2 20.2 23.1 26.1
5.3 7.1 9.0 10.8 12.7 15.6 18.5 21.5 24.4
100 -
105 -
110 -
115 -
-
-
-
-
-
-
-
-
-
7.2 10.8 14.3 17.9
50 Unitary Products Group
035-17377-000 REV A (0201)
TABLE 54: 8.5 TON STANDARD EFFICIENCY SUPERHEAT CHARGING
Superheat at Compressor Suction (°F)
Airflow = 3400 CFM
Outdoor
Temp (°F) Indoor WB Temp (°F)
65
70
75
80
85
90
95
100
105
110
115
-
-
-
-
55 57 59 61 63 65 67 69 71 73 75
5.5 8.5 11.5 14.4 17.4 20.3 23.3 25.0 26.6 28.3 29.9
-
-
-
-
6.4 9.6 12.7 15.9 19.1 22.3 24.1 25.9 27.7 29.5
-
-
-
7.7 11.1 14.5 17.9 21.3 23.2 25.1 27.0 29.0
5.7 9.4 13.0 16.6 20.2 22.3 24.4 26.4 28.5
7.7 11.5 15.4 19.2 21.4 23.6 25.8 28.0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
6.5 9.7 13.0 16.2 18.9 21.7 24.4 27.2
5.3 7.9 10.6 13.2 16.5 19.8 23.0 26.3
-
-
-
-
5.9 7.9 9.9 13.7 17.5 21.3 25.1
-
-
-
5.3 6.6 10.9 15.2 19.5 23.8
-
-
-
-
8.1
5.3
12.9
10.6
17.7
16.0
22.5
21.3
TABLE 55: 10 TON STANDARD EFFICIENCY SUPERHEAT CHARGING
Superheat at Compressor Suction (°F)
Airflow = 4000 CFM
Outdoor
Temp (°F) Indoor WB Temp (°F)
55 57 59 61 63 65 67 69 71 73 75
65 19.6 20.8 22.0 23.2 24.4 25.6 26.9 28.4 29.9 31.4 32.9
70 14.4 16.0 17.5 19.0 20.5 22.0 23.5 25.4 27.3 29.2 31.0
75
80
85
90
95
100
105
110
115
-
-
-
-
-
9.3 11.1 12.9 14.7 16.6 18.4 20.2 22.4 24.7 26.9 29.1
6.3 8.4 10.5 12.6 14.8 16.9 19.5 22.0 24.6 27.2
-
-
-
-
-
-
6.3 8.7 11.1 13.6 16.5 19.4 22.4 25.3
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
6.8 8.7 10.5 13.4 16.3 19.3 22.2
5.3 6.7 8.1 10.8 13.5 16.2 18.9
-
-
-
-
-
-
5.7
-
-
8.1
5.5
-
10.6
7.7
-
13.1
10.0
6.9
15.5
12.2
8.9
Unitary Products Group 51
035-17377-000 (0201) REV A
TABLE 56: 12.5 TON STANDARD EFFICIENCY SUPERHEAT CHARGING
Superheat at Compressor Suction (°F)
Airflow = 5000 CFM
Outdoor
Temp (°F) Indoor WB Temp (°F)
55 57 59 61 63 65 67 69 71 73 75
65 33.6 34.2 34.7 35.3 35.9 36.4 37.0 37.3 37.5 37.8 38.0
70 29.6 30.4 31.1 31.9 32.7 33.4 34.2 34.7 35.3 35.8 36.3
75 25.6 26.6 27.5 28.5 29.5 30.5 31.4 32.2 33.0 33.8 34.6
80 21.6 22.8 24.0 25.1 26.3 27.5 28.6 29.7 30.8 31.8 32.9
85 17.6 19.0 20.4 21.7 23.1 24.5 25.9 27.2 28.5 29.9 31.2
90 11.6 13.4 15.2 16.9 18.7 20.5 22.3 24.3 26.3 28.3 30.3
95
100
5.6 7.8 10.0 12.1 14.3 16.5 18.7 21.3 24.0 26.7 29.4
6.1 7.8 9.4 11.1 12.8 14.5 17.5 20.6 23.7 26.7
105 -
110 -
115 -
-
-
-
-
-
-
-
-
-
5.4 6.1 10.0 13.8 17.6 21.5
6.2 10.4 14.6 18.8
TABLE 57: 6.5 TON HIGH EFFICIENCY SUPERHEAT CHARGING
Superheat at Compressor Suction (°F)
Airflow = 2500 CFM
Outdoor
Temp (°F) Indoor WB Temp (°F)
65
70
75
55 57 59 61 63 65 67 69 71 73 75
5.8 8.5 11.2 13.9 16.6 19.3 22.0 24.3 26.7 29.0 31.3
5.6 7.7 9.9 12.0 14.2 16.4 18.5 21.3 24.1 26.8 29.6
5.3 7.0 8.6 10.2 11.8 13.4 15.1 18.3 21.5 24.7 27.9
80 5.1 6.2 7.3 8.3 9.4 10.5 15.3
85
90
95
100
105
-
-
-
-
-
110 -
115 -
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
52 Unitary Products Group
035-17377-000 REV A (0201)
TABLE 58: 7.5 TON HIGH EFFICIENCY SUPERHEAT CHARGING
Superheat at Compressor Suction (°F)
Airflow = 3000 CFM
Outdoor
Temp (°F) Indoor WB Temp (°F)
55 57 59 61 63 65 67 69 71 73 75
65 19.6 20.8 22.0 23.2 24.4 25.6 26.9 28.4 29.9 31.4 32.9
70 16.0 17.2 18.4 19.7 20.9 22.1 23.4 25.4 27.4 29.4 31.4
75 12.3 13.6 14.8 16.1 17.3 18.6 19.9 22.4 24.9 27.4 29.9
80
85
8.7 10.0 11.2 12.5 13.8 15.1 16.4 19.4 22.4 25.4 28.4
5.1 6.4 7.7 9.0 10.3 11.6 12.9 16.4 19.9 23.4 26.9
90 5.3 6.3 7.3 8.2 9.2 10.2
95 5.6 6.3 6.9 7.6 8.2 8.9 9.5 13.5
100 5.2 5.8 6.5 7.1 7.8 8.4 9.1 12.3
105 -
110 -
115 -
8.5 ton high efficiency unit uses TXV. Charge the unit to 10° subcooling.
10 ton high efficiency unit uses TXV. Charge the unit to 10° subcooling.
TABLE 59: 12.5 TON HIGH EFFICIENCY SUPERHEAT CHARGING
Superheat at Compressor Suction (°F)
Airflow = 5000 CFM
Outdoor
Temp (°F) Indoor WB Temp (°F)
65
70
75
80
55 57 59 61 63 65 67 69 71 73 75
7.9 10.7 13.6 16.4 19.3 22.2 25.0 26.9 28.7 30.5 32.4
7.3 9.7 12.2 14.6 17.1 19.5 22.0 24.2 26.5 28.8 31.0
6.7 8.7 10.8 12.8 14.8 16.9 18.9 21.6 24.3 27.0 29.7
6.1 7.7 9.3 11.0 12.6 14.3 15.9 19.0 22.1 25.2 28.3
85 5.5 6.7 7.9 9.2 10.4 11.6 12.9 16.4 19.9 23.5 27.0
90 5.6 6.5 7.4 8.4 9.3 10.2
95 5.6 6.3 6.9 7.6 8.2 8.8 9.5 13.5
100 5.2 5.8 6.5 7.1 7.8 8.4 9.0 12.3 18.8
105 -
110 -
115 -
-
-
Unitary Products Group 53
035-17377-000 (0201) REV A
NORMAL MAINTENANCE
Prior to any of the following maintenance procedures, shut off all power to the unit to prevent personal injury.
Periodic maintenance normally consists of changing or cleaning filters and (under some conditions) cleaning the main burners of gas furnace units.
GENERAL
FILTERS
Inspect once a month. Replace disposable or clean permanent type as necessary. DO NOT replace permanent type with disposable.
MOTORS
Indoor fan and outdoor fan motors are permanently lubricated and require no maintenance.
The draft motors on gas furnace units are factory lubricated for an estimated 10 years of life.
OUTDOOR COIL
Dirt should not be allowed to accumulate on the outdoor coil surface or other parts in the air circuit. Cleaning should be as often as necessary to keep coil clean. Use a brush, vacuum cleaner attachment, or other suitable means. If water is used to clean coil, be sure power to the unit is shut off prior to cleaning. Service access is provided in the front and rear condenser compartment panels to provide improved access to the condenser coils.
Do not remove service panels or attempt to clean the interior of the condenser section when the unit is powered and/or operating. Shut off all power to the unit prior to cleaning or maintenance of the condenser section internals.
NOTE: Exercise care when cleaning the coil so that the coil fins are not damaged. Do not permit the outdoor air discharge to be obstructed by overhanging structures of shrubs.
GAS FURNACE UNITS
BURNER
Periodically (at least annually at the beginning of each heating season) make a visual check of the main burner flame. If it is not possible to adjust for the proper flame, the burners may need cleaning.
BURNER CLEANING
Remove the burners from the furnace as explained in
“BURNER/ORIFICE INSTRUCTIONS”. Clean burners by applying hot water along the top of the burners.
COMBUSTION AIR DISCHARGE
Visually inspect discharge outlet periodically to make sure that there is no buildup of soot and dirt. If necessary, clean the outlet to maintain adequate combustion air discharge.
CLEANING FLUE PASSAGES & HEATING ELEMENTS
With proper combustion adjustment, the heat exchanger tubes of a gas-fired furnace will seldom need cleaning. If the tubes should become sooted, they can be cleaned as follows:
1.
Remove the burner assembly as outlined in
“BURNER/ORIFICES INSTRUCTIONS”.
2.
Remove the screws holding the flue collector box. Carefully remove the flue collector box.
3.
Remove the flue baffles from the tube interiors.
4.
Using a wire brush on a flexible wand, brush out the inside of each heat exchanger from the burner inlet and flue outlet ends.
5.
Brush out the inside of the flue collector box and the flue baffles.
6.
Run the wire brush into the flue exhaust tube from the flue collector end. Do not damage the flue exhaust screen, remove if necessary.
7.
If soot build-up is particularly bad, remove the draft motor and clean the wheel and housing.
8.
After brushing is complete, blow away all brushed areas with air or nitrogen. Vacuum as needed.
9.
Replace parts in the reverse order that they were removed in Steps 1 through 3.
10. Assure that all seams on the vent side of the combustion system are airtight. Apply a high temperature (500°F+) sealing compound where needed.
54 Unitary Products Group
035-17377-000 REV A (0201)
TROUBLESHOOTING
Troubleshooting of components may require opening the electrical control box with the power connected to the unit. 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 to the unit prior to any of the following maintenance procedures so as to prevent personal injury.
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.
PREDATOR FLASH CODES
Various flash codes are utilized by the unit control board
(UCB) to aid 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. The alarm history can be checked by pressing and releasing the ALARMS button on the UCB. 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.
TABLE 60: UNIT CONTROL BOARD FLASH CODES
Flash Code Description
On Steady Control Failure - Replace Control
Heart Beat
1 Flash
Normal Operation
2 Flashes
Not Applicable
Control waiting ASCD
*
HPS1 - Compressor Lock out 3 Flashes
4 Flashes
5 Flashes
6 Flashes
7 Flashes
8 Flashes
HPS2 - Compressor Lock out
LPS1 - Compressor Lock out
LPS2 - Compressor Lock out
FS1 - Compressor Lock out
9 Flashes
10 Flashes
11 Flashes
12 Flashes
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
*
Compressors Locked Out Because The
Economizer Is Using Free Cooling
*
Fan Overload Switch Trip - Not Applicable On This
Unit
Compressor Held Off Due To Low Voltage* 13 Flashes
14 Flashes
OFF
EEPROM Storage Failure (Control Failure)
No Power or Control Failure
*.
These flash codes do not represent alarms.
TABLE 61: IGNITION CONTROL FLASH CODES
FLASHES FAULT CONDITIONS CHECK
Control STEADY ON Control Failure
HEARTBEAT Normal Operation
1
2
Not Applicable
Pressure Switch
Stuck Closed
3
Pressure Switch Failed
To Close
4 Limit Switch Open
Pressure Switch
Venter Pressure Switch
Vent Blocked
Main Limit
AUX Limit
5
Flame Present With Gas
Off First Stage Gas Valve
Energized With W1 Off
Second Stage Gas Valve
Energized With First
Stage
Gas Valve Off
Gas Valve
6 Ignition Lockout
Gas Flow
Gas Pressure
Gas Valve
Flame Sensor
Unitary Products Group 55
035-17377-000 (0201) REV A
TABLE 61: IGNITION CONTROL FLASH CODES
FLASHES FAULT CONDITIONS CHECK
STEADY OFF
No Power Or Control Failure
24VAC or Control
Monitor
Monitored
Systems
Problem?
Yes
No
Trip/Failure
Programming?
No
Yes
Program
Unit
Control
Board
Turn off ID
Blower Motor
Yes
No
Fan on
>30 secs?
Yes
No
Lossof Call for ID Blower?
Call for
Heating?
Yes
No
Call for
Heat
Energize ID
Blower Motor
Yes
No
Fan off
>10 secs?
No
Yes
Call for
ID Blower?
Loss of
Call for
Heating?
No
Yes
Heat Off
Call for
Cooling?
No
Yes
Call for 2nd
Stage
Cooling
No
First
Stage?
Yes
Call for 1st
Stage
Cooling
No
Loss of Call for Cooling?
Yes
Cool Off
FIGURE 23 : BASIC TROUBLESHOOTING FLOWCHART
56 Unitary Products Group
035-17377-000 REV A (0201)
Power to
Unit
Call for heat?
No
Yes
Voltage @
Gas Valve?
No
Yes
Initialize ASCD
Energize ID
Blower
FIGURE 24 : POWER ON FLOW CHART
Montior
Unitary Products Group 57
035-17377-000 (0201) REV A
FIGURE 25 : TRIP FAILURE FLOW CHART
58 Unitary Products Group
035-17377-000 REV A (0201)
COOLING OPERATIONS
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.
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 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, and 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, lowpressure 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 24-volt 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
Unitary Products Group 59
035-17377-000 (0201) REV A 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 York distributors can test the UCB for this programming.
15. If none of the above corrected the error, test the integrity of the UGB. 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.
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, and 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, lowpressure 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
60 Unitary Products Group
035-17377-000 REV A (0201)
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 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 York 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.
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 24-volt 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.
Unitary Products Group 61
035-17377-000 (0201) REV A
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 York distributors.
14. If none of the above corrected the error, test the integrity of the UGB. 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.
GAS FURNACE OPERATIONS
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).
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.
1.
Place the thermostat fan switch in the “ON” position. If the supply air blower motor energizes, go to Step 9.
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.
a.
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: 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.
7.
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.
8.
If the thermostat and UCB are properly wired, replace the
UCB.
9.
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.
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 leads. If line voltage is present, replace the draft motor.
3.
If line voltage is not present, check for line voltage on the ignition control at the “inducer” terminal draft motor relay
(DMR or DMC) contacts in the main control box and check to see if the (DMR or DMC) is pulled in.
The draft motor runs but the furnace does not light and the spark ignitor does not spark.
62 Unitary Products Group
035-17377-000 REV A (0201)
1.
Check for 24 volts at the spark ignitor from the ignition control board (ICB). Check the 24-volt wiring from the ICB to the spark ignitor. Check for 24 volts at the ICB spark ignitor terminal.
2.
Check the ground wiring for the ICB and the gas valve is intact and making good electrical connection. Check the ceramic insulator on the spark ignitor for breaks or cracks.
Replace the spark ignitor if damaged.
3.
With the draft motor running, check for 24 volts at the pressure switch terminal on the ICB. If not present, check for 24 volts on the terminal from the pressure switch. If present, go to step 4. If 24 volts is not present, the either pressure or rollout switch is not closed. Or the draft motor is not sufficiently evacuating the heat exchanger tubes or the pressure switch has failed. Check the operation of the pressure switch. Check the line voltage to the unit; if line voltage is low, call the local power company. If the problem persists, the draft motor may need replacement.
4.
If the furnace is hot, it may be out on a high temperature limit open; wait for limit reset.
5.
If all are intact replace the ICB.
The draft motor runs and the spark ignitor sparks at the burner, but the burner does not ignite and a gas odor is not detected at the draft motor outlet.
1.
Check to ensure gas is being supplied to the unit. Confirm that the gas pressure to the unit is within the proper limits as described in the “POST START CHECKLIST”.
2.
Check the voltage at the gas valve and at the gas valve terminals on the ICB. Check all wiring between the ICB and the gas valve. Check to make sure the ground connections are intact.
3.
If 24 volts is present, remove the pilot burner and the orifice. The removal procedure is described in
“BURNER/ORIFICE INSTRUCTIONS.” Inspect the orifice for obstruction. If it is clear, replace the gas valve.
Main burners light but exhibit erratic flame characteristics.
4.
Check the main burner orifices for obstruction and alignment. The removal procedure is described in
“BURNER/ORIFICE INSTRUCTIONS.” Clean or replace burner orifices and burners as needed.
Unitary Products Group 63
NOTES
Subject to change without notice. Printed in U.S.A.
Copyright © by Unitary Products Group 2001. All rights reserved.
Unitary
Products
Group
CD-17377 Supersedes: 035-17240-000 Rev B (0101)
035-17377-000 A (0201)
5005 Norman
York
Drive
OK
73069
035-17377-000 REV A (0201)
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . 6
NOTES CAUTIONS AND WARNINGS . . . . . . . . . . . 6
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
PRECEDING INSTALLATION . . . . . . . . . . . . . . . . . . . . . 7
LIMITATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
RIGGING AND HANDLING . . . . . . . . . . . . . . . . . . . . . . . 9
CLEARANCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
DUCT COVERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
CONDENSATE DRAIN . . . . . . . . . . . . . . . . . . . . . . . . . . 16
COMPRESSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
THERMOSTAT WIRING . . . . . . . . . . . . . . . . . . . . . . . . . 16
POWER AND CONTROL WIRING . . . . . . . . . . . . . . . . . 16
POWER WIRING DETAIL . . . . . . . . . . . . . . . . . . . . . . . 17
GAS HEAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
LP UNITS, TANKS AND PIPING . . . . . . . . . . . . . . . . . . . . . . . 26
GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
GAS CONNECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
VENT AND COMBUSTION AIR . . . . . . . . . . . . . . . . . . . . . . . 27
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
ELECTRIC HEAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
ECONOMIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
RAIN HOOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
SET POINT ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . 28
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
PHASING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
SUPPLY AIR INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . 29
CHECKING SUPPLY AIR CFM . . . . . . . . . . . . . . . . . . . . . . . . 29
BLOWER ROTATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
BELT TENSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
AIR BALANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
CHECKING AIR QUANTITY . . . . . . . . . . . . . . . . . . . . . . 41
SUPPLY AIR DRIVE ADJUSTMENT . . . . . . . . . . . . . . . 42
GAS FURNACE OPERATION . . . . . . . . . . . . . . . . . 43
BURNERS/ORIFICES INSPECTION/SERVICING . . . . 43
LIGHTING THE MAIN BURNERS . . . . . . . . . . . . . . . . . . . . . . 43
POST START CHECKLIST . . . . . . . . . . . . . . . . . . . . . . 44
SHUT DOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
MANIFOLD GAS PRESSURE ADJUSTMENT . . . . . . . . 44
ADJUSTMENT OF TEMPERATURE RISE . . . . . . . . . . 44
CHECKING GAS INPUT . . . . . . . . . . . . . . . . . . . . . . . . 44
NATURAL GAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
COOLING OPERATION INSTRUCTIONS . . . . . . .46
COOLING SYSTEM PRELIMINARY OPERATION . . . . 46
TURN ON THE POWER TO THE UNIT . . . . . . . . . . . . . 46
POST START CHECK LIST . . . . . . . . . . . . . . . . . . . . . . 46
PROPER SYSTEM PRESSURES FOR BOTH CIRCUITS . . .46
SHUT DOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
SEQUENCE OF OPERATIONS . . . . . . . . . . . . . . . .46
OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . 46
PROTECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
CONTINUOUS BLOWER . . . . . . . . . . . . . . . . . . . . . . . . 47
INTERMITTENT BLOWER . . . . . . . . . . . . . . . . . . . . . . 47
COOLING SEQUENCE OF OPERATION . . . . . . . . . . . 47
COOLING OPERATION ERRORS . . . . . . . . . . . . . . . . 47
HIGH-PRESSURE LIMIT SWITCH . . . . . . . . . . . . . . . . . . . . .47
LOW-PRESSURE LIMIT SWITCH . . . . . . . . . . . . . . . . . . . . . .47
FREEZESTAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
FLASH CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
GAS HEATING SEQUENCE OF OPERATIONS . . . . . . 48
IGNITION CONTROL BOARD . . . . . . . . . . . . . . . . . . . . 48
FIRST STAGE OF HEATING . . . . . . . . . . . . . . . . . . . . . . . . . .48
SECOND STAGE OF HEATING . . . . . . . . . . . . . . . . . . . . . . .48
RETRY OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
RECYCLE OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
GAS HEATING OPERATION FAULTS . . . . . . . . . . . . . 48
LOCK-OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
TEMPERATURE LIMIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
FLAME SENSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
GAS VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
PRESSURE SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
ROLLOUT SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
INTERNAL MICROPROCESSOR FAILURE . . . . . . . . . . . . . .49
LOW AMBIENT COOLING . . . . . . . . . . . . . . . . . . . . . . . 49
NORMAL MAINTENANCE . . . . . . . . . . . . . . . . . . .54
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
MOTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
OUTDOOR COIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
GAS FURNACE UNITS . . . . . . . . . . . . . . . . . . . . . . . . . 54
BURNER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
BURNER CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
COMBUSTION AIR DISCHARGE . . . . . . . . . . . . . . . . . . . . . .54
CLEANING FLUE PASSAGES & HEATING ELEMENTS . . . .54
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . .55
PREDATOR FLASH CODES . . . . . . . . . . . . . . . . . . . . . 55
COOLING OPERATIONS . . . . . . . . . . . . . . . . . . . .58
GAS FURNACE OPERATIONS . . . . . . . . . . . . . . .61
Unitary Products Group 65
035-17377-000 REV A (0201)
66 Unitary Products Group
1 UNIT SHIPPING BRACKET . . . . . . . . . . . . . . . . . 7
2 CONDENSER COVERING . . . . . . . . . . . . . . . . . 7
3 COMPRESSOR SECTION . . . . . . . . . . . . . . . . . 7
4 PREDATOR™ COMPONENT LOCATION . . . . . 8
5 UNIT 4 POINT LOAD . . . . . . . . . . . . . . . . . . . . . . 9
6 UNIT CENTER OF GRAVITY . . . . . . . . . . . . . . 10
7 UNIT 6 POINT LOAD . . . . . . . . . . . . . . . . . . . . . 10
8 UNIT DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . 12
9 BOTTOM DUCT OPENINGS
(FROM ABOVE) . . . . . . . . . . . . . . . . . . . . . . . . . 13
10 REAR DUCT DIMENSIONS . . . . . . . . . . . . . . . 14
11 PREDATOR™ ROOF CURB DIMENSIONS . . . 15
12 SUNLINE™ TO PREDATOR™ TRANSITION
ROOF CURBS . . . . . . . . . . . . . . . . . . . . . . . . . . 15
13 CONDENSATE DRAIN . . . . . . . . . . . . . . . . . . . 16
14 ELECTRONIC THERMOSTAT FIELD
WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
15 FIELD WIRING 24 VOLT THERMOSTAT . . . . . 18
16 FIELD WIRING DISCONNECT . . . . . . . . . . . . . 19
17 SIDE ENTRY GAS PIPING . . . . . . . . . . . . . . . . 26
18 BOTTOM ENTRY GAS PIPING . . . . . . . . . . . . . 26
19 ENTHALPY SET POINT CHART . . . . . . . . . . . . 28
20 BELT ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . 30
21 TYPICAL FLAME . . . . . . . . . . . . . . . . . . . . . . . . 43
22 TYPICAL GAS VALVE . . . . . . . . . . . . . . . . . . . . 43
23 BASIC TROUBLESHOOTING
FLOWCHART . . . . . . . . . . . . . . . . . . . . . . . . . . 56
24 POWER ON FLOW CHART . . . . . . . . . . . . . . . 56
25 TRIP FAILURE FLOW CHART . . . . . . . . . . . . . 57
Unitary Products Group
035-17377-000 REV A (0201)
67
035-17377-000 REV A (0201)
68 Unitary Products Group
035-17377-000 REV A (0201)
1 PRODUCT NOMENCLATURE . . . . . . . . . . . . . . 5
2 AIRFLOW ABBREVIATIONS . . . . . . . . . . . . . . . . 5
3 INSTALLATION ABBREVIATIONS . . . . . . . . . . . 5
4 ADDITIONAL OPTIONS ABBREVIATIONS . . . . 5
5 UNIT VOLTAGE LIMITATIONS . . . . . . . . . . . . . . 8
6 UNIT TEMPERATURE LIMITATIONS . . . . . . . . . 9
7 UNIT WEIGHTS . . . . . . . . . . . . . . . . . . . . . . . . . . 9
8 4 POINT LOAD WEIGHT . . . . . . . . . . . . . . . . . . 10
9 6 POINT LOAD WEIGHT . . . . . . . . . . . . . . . . . . 10
10 UNIT CLEARANCES . . . . . . . . . . . . . . . . . . . . . 12
11 CONTROL WIRE SIZES . . . . . . . . . . . . . . . . . . 16
12 ELECTRICAL DATA 6-1/2 TON - STANDARD
EFFICIENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
13 ELECTRICAL DATA 6-1/2 TON - HIGH
EFFICIENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
14 ELECTRICAL DATA 7-1/2 TON - STANDARD
EFFICIENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
15 ELECTRICAL DATA 7-1/2 TON - HIGH
EFFICIENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
16 ELECTRICAL DATA 8-1/2 TON - STANDARD
EFFICIENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
17 ELECTRICAL DATA 8-1/2 TON - HIGH
EFFICIENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
18 ELECTRICAL DATA 10 TON - STANDARD
EFFICIENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
19 ELECTRICAL DATA 10 TON - HIGH
EFFICIENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
20 ELECTRICAL DATA 12-1/2 TON - STANDARD
EFFICIENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
21 ELECTRICAL DATA 12-1/2 TON - HIGH
EFFICIENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
22 PHYSICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . 24
23 GAS HEAT LIMIT SETTINGS . . . . . . . . . . . . . . 26
24 GAS PIPE SIZING - CAPACITY OF PIPE . . . . . 27
25 ACCESSORY STATIC RESISTANCE . . . . . . . . 29
26 SUPPLY AIR LIMITATIONS . . . . . . . . . . . . . . . 29
27 6-1/2 TON STANDARD MOTOR DOWN
SHOT BLOWER PERFORMANCE . . . . . . . . . . 31
28 6-1/2 TON OPTIONAL MOTOR DOWN SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . .31
29 7-1/2 TON STANDARD MOTOR DOWN SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . .32
30 7-1/2 TON OPTIONAL MOTOR DOWN SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . .32
31 8-1/2 TON STANDARD MOTOR DOWN SHOT
BLOWER PERFORMANCE 33
32 8-1/2 TON OPTIONAL MOTOR DOWN SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . .33
33 10 TON STANDARD MOTOR DOWN SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . .34
34 10 TON OPTIONAL MOTOR DOWN SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . .34
35 12-1/2 TON STANDARD MOTOR DOWN SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . .35
36 12-1/2 TON OPTIONAL MOTOR DOWN SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . .35
37 6-1/2 TON STANDARD MOTOR SIDE SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . .36
38 6-1/2 TON OPTIONAL MOTOR SIDE SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . .36
39 7-1/2 TON STANDARD MOTOR SIDE SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . .37
40 7-1/2 TON OPTIONAL MOTOR SIDE SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . .37
41 8-1/2 TON STANDARD MOTOR SIDE SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . .38
42 8-1/2 TON OPTIONAL MOTOR SIDE SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . .38
43 10 TON STANDARD MOTOR SIDE SHOT BLOW-
ER PERFORMANCE 39
44 10 TON OPTIONAL MOTOR SIDE SHOT BLOW-
ER PERFORMANCE . . . . . . . . . . . . . . . . . . . .39
45 12-1/2 TON STANDARD MOTOR SIDE SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . .40
46 12-1/2 TON OPTIONAL MOTOR SIDE SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . .40
47 INDOOR BLOWER SPECIFICATIONS . . . . . . .41
48 MOTOR SHEAVE DATUM DIAMETERS . . . . .42
49 GAS APPLICATION . . . . . . . . . . . . . . . . . . . . . .43
Unitary Products Group 69
035-17377-000 REV A (0201)
50 GAS HEAT STAGES . . . . . . . . . . . . . . . . . . . . 45
51 GAS RATE CUBIC FEET PER HOUR . . . . . . . 45
52 6.5 TON STANDARD EFFICIENCY
SUPERHEAT CHARGING . . . . . . . . . . . . . . . . 50
53 7.5 TON STANDARD EFFICIENCY
SUPERHEAT CHARGING . . . . . . . . . . . . . . . . 50
54 8.5 TON STANDARD EFFICIENCY
SUPERHEAT CHARGING . . . . . . . . . . . . . . . . 51
55 10 TON STANDARD EFFICIENCY
SUPERHEAT CHARGING . . . . . . . . . . . . . . . . 51
56 12.5 TON STANDARD EFFICIENCY
SUPERHEAT CHARGING . . . . . . . . . . . . . . . . 52
57 6.5 TON HIGH EFFICIENCY SUPERHEAT
CHARGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
58 7.5 TON HIGH EFFICIENCY SUPERHEAT
CHARGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
59 12.5 TON HIGH EFFICIENCY SUPERHEAT
CHARGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
60 UNIT CONTROL BOARD FLASH CODES . . . . 55
61 IGNITION CONTROL FLASH CODES . . . . . . . 55
70 Unitary Products Group
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Table of contents
- 2 GENERAL
- 2 SAFETY CONSIDERATIONS
- 2 NOTES CAUTIONS AND WARNINGS
- 2 APPROVALS
- 2 REFERENCE
- 3 INSPECTION
- 3 INSTALLATION
- 23 ACCESSORIES
- 25 START-UP
- 39 GAS FURNACE OPERATION
- 42 COOLING OPERATION INSTRUCTIONS
- 42 SEQUENCE OF OPERATIONS
- 50 NORMAL MAINTENANCE
- 51 TROUBLESHOOTING
- 55 COOLING OPERATIONS
- 58 GAS FURNACE OPERATIONS
- 6 GENERAL
- 6 SAFETY CONSIDERATIONS
- 6 NOTES CAUTIONS AND WARNINGS
- 6 APPROVALS
- 6 REFERENCE
- 7 INSPECTION
- 7 INSTALLATION
- 7 PRECEDING INSTALLATION
- 8 LIMITATIONS
- 9 LOCATION
- 9 RIGGING AND HANDLING
- 10 CLEARANCES
- 14 DUCTWORK
- 15 DUCT COVERS
- 16 CONDENSATE DRAIN
- 16 COMPRESSORS
- 16 FILTERS
- 16 THERMOSTAT WIRING
- 16 POWER AND CONTROL WIRING
- 17 POWER WIRING DETAIL
- 26 GAS HEAT
- 26 LP UNITS, TANKS AND PIPING
- 26 GAS PIPING
- 27 GAS CONNECTION
- 27 VENT AND COMBUSTION AIR
- 27 ACCESSORIES
- 27 ELECTRIC HEAT
- 28 ECONOMIZER
- 28 RAIN HOOD
- 28 SET POINT ADJUSTMENT
- 29 START-UP
- 29 PHASING
- 29 SUPPLY AIR INSTRUCTIONS
- 29 CHECKING SUPPLY AIR CFM
- 29 BLOWER ROTATION
- 30 BELT TENSION
- 41 AIR BALANCE
- 41 CHECKING AIR QUANTITY
- 42 SUPPLY AIR DRIVE ADJUSTMENT
- 43 GAS FURNACE OPERATION
- 43 LIGHTING THE MAIN BURNERS
- 44 POST START CHECKLIST
- 44 SHUT DOWN
- 44 MANIFOLD GAS PRESSURE ADJUSTMENT
- 44 ADJUSTMENT OF TEMPERATURE RISE
- 44 CHECKING GAS INPUT
- 44 NATURAL GAS
- 46 COOLING OPERATION INSTRUCTIONS
- 46 COOLING SYSTEM PRELIMINARY OPERATION
- 46 TURN ON THE POWER TO THE UNIT
- 46 POST START CHECK LIST
- 46 PROPER SYSTEM PRESSURES FOR BOTH CIRCUITS
- 46 SHUT DOWN
- 46 SEQUENCE OF OPERATIONS
- 46 OVERVIEW
- 46 SAFETY CONTROLS
- 47 PROTECTION
- 47 CONTINUOUS BLOWER
- 47 INTERMITTENT BLOWER
- 47 COOLING SEQUENCE OF OPERATION
- 47 COOLING OPERATION ERRORS
- 47 HIGH-PRESSURE LIMIT SWITCH
- 47 LOW-PRESSURE LIMIT SWITCH
- 48 FREEZESTAT
- 48 FLASH CODES
- 48 RESET
- 48 GAS HEATING SEQUENCE OF OPERATIONS
- 48 IGNITION CONTROL BOARD
- 48 FIRST STAGE OF HEATING
- 48 SECOND STAGE OF HEATING
- 48 RETRY OPERATION
- 48 RECYCLE OPERATION
- 48 GAS HEATING OPERATION FAULTS
- 48 LOCK-OUT
- 48 TEMPERATURE LIMIT
- 49 FLAME SENSE
- 49 GAS VALVE
- 49 PRESSURE SWITCH
- 49 ROLLOUT SWITCH
- 49 INTERNAL MICROPROCESSOR FAILURE
- 49 LOW AMBIENT COOLING
- 54 NORMAL MAINTENANCE
- 54 GENERAL
- 54 FILTERS
- 54 MOTORS
- 54 OUTDOOR COIL
- 54 GAS FURNACE UNITS
- 54 BURNER
- 54 BURNER CLEANING
- 54 COMBUSTION AIR DISCHARGE
- 54 CLEANING FLUE PASSAGES & HEATING ELEMENTS
- 55 TROUBLESHOOTING
- 55 PREDATOR™ FLASH CODES
- 59 COOLING OPERATIONS
- 62 GAS FURNACE OPERATIONS