York D2CG300 Manual Do Utilizador
General ................................................................................ 1
Inspection............................................................................. 1
Reference............................................................................. 1
Approvals ............................................................................. 1
Nomenclature....................................................................... 2
Inspection............................................................................. 1
Reference............................................................................. 1
Approvals ............................................................................. 1
Nomenclature....................................................................... 2
INSTALLATION
Limitations ............................................................................ 3
Location ............................................................................... 3
Rigging and Handling .......................................................... 3
Clearances........................................................................... 3
Ductwork .............................................................................. 3
Fixed Outdoor Air Intake Damper ........................................ 4
Condensate Drain ................................................................ 4
Compressors........................................................................ 4
Filters ................................................................................... 4
Service Access .................................................................... 4
Thermostat........................................................................... 5
Power and Control Wiring .................................................... 5
Optional Electric Heaters (DCE Models) ............................. 5
Combustion Discharge (DCG Models) ................................ 5
Gas Piping (DCG Models) ................................................... 6
Gas Connection (DCG Models) ........................................... 6
L.P. Units, Tanks and Piping (DCG Models)......................... 6
Vent and Combustion Air Hoods (DCG Models) ................. 7
Econ. / Mot. Damper Rain Hood Accy. (1EH0401) .............. 7
Econ. / Power Rain Hood Accy. (1EH0402) ......................... 9
Location ............................................................................... 3
Rigging and Handling .......................................................... 3
Clearances........................................................................... 3
Ductwork .............................................................................. 3
Fixed Outdoor Air Intake Damper ........................................ 4
Condensate Drain ................................................................ 4
Compressors........................................................................ 4
Filters ................................................................................... 4
Service Access .................................................................... 4
Thermostat........................................................................... 5
Power and Control Wiring .................................................... 5
Optional Electric Heaters (DCE Models) ............................. 5
Combustion Discharge (DCG Models) ................................ 5
Gas Piping (DCG Models) ................................................... 6
Gas Connection (DCG Models) ........................................... 6
L.P. Units, Tanks and Piping (DCG Models)......................... 6
Vent and Combustion Air Hoods (DCG Models) ................. 7
Econ. / Mot. Damper Rain Hood Accy. (1EH0401) .............. 7
Econ. / Power Rain Hood Accy. (1EH0402) ......................... 9
OPERATION
Cooling System.................................................................. 15
Preliminary Operation Cooling........................................... 15
Cooling Sequence of Operation......................................... 15
Safety Controls (Cooling)................................................... 15
Electric Heating - Sequence of Operation ......................... 15
Heating Anticipator Setpoints ............................................ 16
Gas Heating - Sequence of Operation .............................. 16
Safety Controls (Heating)................................................... 16
Heat Anticipator Setpoints ................................................. 17
Pre-Start Check List........................................................... 17
Preliminary Operation Cooling........................................... 15
Cooling Sequence of Operation......................................... 15
Safety Controls (Cooling)................................................... 15
Electric Heating - Sequence of Operation ......................... 15
Heating Anticipator Setpoints ............................................ 16
Gas Heating - Sequence of Operation .............................. 16
Safety Controls (Heating)................................................... 16
Heat Anticipator Setpoints ................................................. 17
Pre-Start Check List........................................................... 17
START-UP
Operating Instructions........................................................ 17
Post-Start Check List ......................................................... 17
Manifold Gas Pressure Adjustment ................................... 17
Pilot Checkout .................................................................... 18
Burner Instructions............................................................. 18
Burner Air Shutter Adjustment........................................... 18
Checking Supply Air CFM.................................................. 18
Adjustment of Temperature Rise........................................ 19
Checking Gas Input ........................................................... 19
Secure Owner’s Approval .................................................. 19
Post-Start Check List ......................................................... 17
Manifold Gas Pressure Adjustment ................................... 17
Pilot Checkout .................................................................... 18
Burner Instructions............................................................. 18
Burner Air Shutter Adjustment........................................... 18
Checking Supply Air CFM.................................................. 18
Adjustment of Temperature Rise........................................ 19
Checking Gas Input ........................................................... 19
Secure Owner’s Approval .................................................. 19
MAINTENANCE & TROUBLESHOOTING
Normal Maintenance ......................................................... 20
Cleaning Flue Passages and Heating Elements ............... 20
Troubleshooting.................................................................. 21
Replacement Parts ............................................................ 23
Cleaning Flue Passages and Heating Elements ............... 20
Troubleshooting.................................................................. 21
Replacement Parts ............................................................ 23
TABLES
No. Description Page
1
Unit Application Data ..................................
3
2
Gas Heat Application Data .........................
6
3
Pipe Sizing ..................................................
6
4
Physical Data ..............................................
10
5
Electrical Data - Basic Units ......................
10
6
Electrical Data - Units With Elec. Heat ......
10
7
Four and Six Point Loads............................
13
8
Supply Air Blower Performance .................
13
9
Static Resistances ......................................
14
10
Power Exhaust Performance ......................
14
11
Blower Motor and Drive Data......................
14
12
Heat Anticipator Setpoint ............................
16
13
Limit Control Setting ...................................
17
14
Gas Rate - Cubic Feet Per Hour.................
19
FIGURES
No. Description Page
1
Typical Rigging............................................
3
2
Center of Gravity.........................................
3
3
Fixed Outdoor Air Damper..........................
4
4
Recommended Drain Piping.......................
4
5
Typical Field Wiring .....................................
5
6
External Supply Connection .......................
6
7
Bottom Supply Connection .........................
7
8
Vent and Combustion Air Hoods.................
8
9
Adjusting Enthalpy Setpoint........................
9
10
Dimensions and Clearances.......................
11
Dimensions and Clearances (cont’d)..........
12
11
Four and Six Point Loads............................
13
12
Gas Valve Piping.........................................
16
13
Gas Valve and Controls ..............................
17
14
Typical Gas Valve ........................................
17
15
Proper Flame Adjustment ...........................
18
16
Typical Flame Appearance .........................
18
17
Belt Adjustment...........................................
18
18
Pressure Drop versus Supply Air CFM ......
19
19
Typical Flue Baffle Installation ....................
20
TABLE OF CONTENTS
D
2
C
G
E
C
4
N
PRODUCT NOMENCLATURE
PRODUCT GENERATION
2 = 2nd Generation
PRODUCT CATEGORY
D = Single Package Air Conditioner
(Air Cooled)
(Air Cooled)
PRODUCT IDENTIFIER
CG = Gas/Electric
CE = Cooling only or
Electric / Electric
CE = Cooling only or
Electric / Electric
VOLTAGE CODE
25 = 208/230-3-60
46 = 460-3-60
58 = 575-3-60
46 = 460-3-60
58 = 575-3-60
NOMINAL HEATING
OUTPUT CAPACITY
300 = 25 Tons
FACTORY INSTALLED
OPTION CODE
EC = Sing. Input Economizer
DK = Diff. Input Economizer
FD = Sing. Input Economizer
w/Power Exhaust
CF = Diff. Input Economizer
w/Power Exhaust
BG = Motorized Outdoor Air
Damper
DK = Diff. Input Economizer
FD = Sing. Input Economizer
w/Power Exhaust
CF = Diff. Input Economizer
w/Power Exhaust
BG = Motorized Outdoor Air
Damper
2
0
0
3
0
2
5
FACTORY INSTALLED
HEAT
A = No Heat
N = Natural Gas
E = Electric
N = Natural Gas
E = Electric
NOMINAL COOLING
CAPACITY
GAS
240 = 240 MBH
320 = 320 MBH
ELECTRIC
018 = 18 KW
036 = 36 KW
054 = 54 KW
072 = 72 KW
530.18-N11Y
2
Unitary Products Group