To find your Daikin McQuay Parts distributor, call 1-800-377-2787 or visit www.DaikinMcQuay.com
Contents
Parts List Revision History ................................................................................................................................... 5
Return Air Fan Detail- Fan Mounts ................................................................................................................ 31
Return Air Fan Detail ...................................................................................................................................... 32
Return Air Fan Motors .................................................................................................................................... 33
24” Section, Small Face Coils ........................................................................................................................ 51
48” Section, Large Face Coils ........................................................................................................................ 51
Fan Mounts- 27” Forward Curved Fan ........................................................................................................... 59
Fan Mounts- 30” Forward Curved Fan ........................................................................................................... 60
Fan Mounts- 33” Forward Curved Fan ........................................................................................................... 61
Fan Mounts- 27” Airfoil Double Width Fan ..................................................................................................... 62
Fan Mounts- 30” Airfoil Double Width Fan ..................................................................................................... 63
Fan Mounts- 33” Airfoil Double Width Fan ..................................................................................................... 64
Fan Mounts- 40” AFSW- RDT Units ............................................................................................................... 65
Fan Mounts- 44” AFSW- RDT Units ............................................................................................................... 66
Supply Air Fan Motors .................................................................................................................................... 67
Belt Guard ...................................................................................................................................................... 68
Inverters & Inverter Bypass Control Box
Motor HP 2 - 5 ............................................................................................................................................ 69
Motor HP 7.5 - 25 ................................................................................................................................. 70, 71
Motor HP 30 - 50 .................................................................................................................................. 72, 73
Line Reactors ............................................................................................................................................. 78
Hi Turn Down Burner ...........................................................................................................................96- 99
Modulating Burner Controls
No Controls- Diagram ......................................................................................................................... 100
No Controls- Components ................................................................................................................... 101
MicroTech III Controls ......................................................................................................................... 102
Hi Turn Down Burner Controls
No Controls- Diagram ......................................................................................................................... 103
No Controls- Components ................................................................................................................... 104
MicroTech III Controls ......................................................................................................................... 105
Gas Train- Inlet ................................................................................................................................106- 108
Gas Train- Outlet ..................................................................................................................................... 112
Gas Train- Damper Linkage ..................................................................................................................... 113
Quiet Fan Assembly: C47= 3, 4 .................................................................................................................. 128
Compressors & Compressor Components
Unit Size 045D ......................................................................................................................................... 129
Unit Size 050D, 051D .............................................................................................................................. 130
Unit Size 060D thru 063D ........................................................................................................................ 131
Unit Size 068D ......................................................................................................................................... 132
Unit Size 070D thru 079D ........................................................................................................................ 133
Condenser Control Box- RCS Only ...................................................................................................... 134- 137
Control Panel - No Controls ................................................................................................................ 144, 145
Control Panel- MicroTech III Units with Controller ...............................................................................146- 148
Power Panel ......................................................................................................................................... 149- 170
Hot Gas Reheat ........................................................................................................................................... 174
Rev. Date Description
A- F 10/11 Archived Revisions A thru F.
G 09/10 Updated Cover and Master page with new title showing 079 Large Condenser. Range changed from 045-075 to 045-
079. Added in Large Condenser sizes and p/ns on various pages. Updated TOC, page headers, and parts tables
with new sizes. New RPS size units include: 051, 063, 071 & 079. P/Ns ref: EPS_5229 Rev J.
Page 6: Changed note for Nominal capacity to an explanation of tonnage rating.
Page 12: Added Quiet Fan (Code 47= 3 or 4) to Nomenclature.
Page 34, 44, 80, 120, 147: Changed Sensor p/n 193414600 to 193414602.
Page 39: Added Wheel p/n 010255226, Bearings 020648654 & 300043930, Shaft p/n 010288112 to Ref #10.
Page 48: Corrected Header for Air Blender Section and added section notation to TOC.
Page 57: Added circle and line to aid in identifying the discharge side of the fan housing.
Page 77: Changed 575V p/ns: 349956738 to 193456302, 349956739 to 193456303, 349956741 to 193456304,
349956742 to 193456305, 349956743 to 193456306, 349956744 to 193456307, & 349956745 to 193456308.
Page 123: Re-wrote Code 47 Note to add Quiet Fan options.
Page 125: Deleted invalid Prop p/n 060013101. Updated table with Large Condenser sizes & p/ns.
Page 126: Added “Code 47= 1, 2” to page header.
Page 127: Deleted invalid Prop p/n 060013101. Added “Code 47= 1, 2” to page header
Page 128: (New)- Added page with “Quiet Fan Assembly” p/ns & instruction drawing. Repaginated document and
updated TOC.
Page 130 (Old) 131 (New): Changed CC Heater Ref #145 from 113108903 to 113108603.
Page 131 (Old) 132 (New): Changed CC Heater Ref #145 from 113108903 to 113108603.
Page 132 (Old) 133 (New): Changed CC Heater Ref #145 from 112056401 to 113108903.
Page 137 thru 140 (Old) 138 thru 141 (New): Added Speedtrol Pressure Switch Harness p/n 403586601.
Page 170- 172 (Old) 171- 173 (New)- Created Section O for Refrigeration Tubing. Updated TOC. Page 170 (Old) 171 (New): Re-wrote Code 48 Note to clarify information. Added Code 03 information.
Page 173 (New): Added additional page for new Large Condenser size p/ns. Repaginated document and updated TOC.
Page 172 (Old) 174 (New): Added instruction drawing and assigned bubble numbers to p/n table. Updated p/n table
with Large Condenser sizes. Added footnote #1 regarding HGRH located on Circuit #2.
H 11/10 Page 41: Replaced Ref #122 ACT 3 actuator p/n 1131395601 with 113139501. Added footnote #1.
Page 147: Replaced COM p/ns: 193408101 with 090016709; 193408201 with 090016711; 193408202 with 090016712, & 193408301 with 090016710.
I 01/11 Page 147: P/ns for LonWorks DAC & LonWorks SCC were reversed. DAC= 090016712, SCC= 090016711.
J 02/11 Page 147:
193410305, 193410406 to 193410306, 193410407 to 193410307 & 193410408 to 193410308.
K 05/11 Page 125: Deleted qty of 1pc. Vandal Guard 403909506 for Size 068.
L 06/11 Page 28: Re-arranged/updated Ref #6 Bub & P/ns. Added 6B Blade p/n 300044027, 6C Shaft p/n 300044028,
6D bearing p/n 300044029, 6F Bushing p/n 000804000. Changed 6I motor p/ns from 065820200 & 046514600 to 300046887 & 300046251.
M 07/11 Page 125, 127: Added new Ref #111 Condenser Motor p/n 500552601 and updated descriptions. Added footnotes # 2-4.
N 08/11 Page 167: Corrected misaligned formatting on table.
O 10/11
Page 132: Changed CC Heater Ref #145 to 113108903 from 113108603.
Page 133: Changed CC Heater Ref #145 to 112056401 from 113108903.
P 12/11
Page 174:
Q 01/12 Page 9: For Code 13 (Air Flow controls), deleted unused code “8”.
Page 147: Added After 9/11 SPS1, 2 p/ns 910117463 & 910117462. Deleted unused sensor SPS3- Code 13=8 is invalid.
R 03/12 Cover, Pg. 5: Updated to current Daikin McQuay logo format.
Page 104: Changed Ref# 25 from 073300801 to 073300803. Changed relay p/n 193454702 to 193454703 3 places.
Added p/ns for R23A relay 349934764 & adapter 349964702.
S 06/12 Various: Changed “McQuay Parts” to “Daikin McQuay Parts”.
Page 74: VTAC9 Inverter p/n 098861454 is 5HP ONLY. Deleted invalid information.
Page 75: Added footnote for 550 Keypad Display p/n.
Page 92: Changed header from “500/650” to “500/640”.
Page 172, 173: Added RCS HGBP kit 193330721. Added footnote #4.
T 07/12 Page 79: Changed PC7 from 060015801 to Switch 910115489 & retrofit kit 910122413. Changed Fitting p/n from
049763002 to 910122414. Added tootnote #1 & updated drawing.
U 07/12 Page 131, 132: Updated tandem compressor information to replacement singles. Rewrote footnote.
Page 133: Added Cir #2 079D cmpr p/ns: 113091901, 113091902, & 113091904.
Page 131: Changed CC Heater Ref #145 to 113108903 from 113108603.
Page 147: Changed SPS1-3 p/ns 049545012 to 910124529 & 049545013 to 910124528. Added footnote #2.
Changed Terminal block p/ns: 193410402 to 193410302, 193410403 to 193410303, 193410405 to
Code 05= Unit Split
C= Condenser F= Fan/Heat Y= None
Code 06= Insulation and Liners
1= 1”, 3/4# with liners on doors
2= 1½”, 1½# with solid liners on doors & ceilings
3= 1½”, 1½# with perforated liners in plenums, solid elsewhere
4= 1½”, 1½# with solid liners on doors, ceilings and floors
5= 1½”, 1½# with perforated liners in plenums, solid elsewhere
(including floors)
6= 1½”, 1½# with SS Solid Liners on doors, ceilings and floors
P1= Single Power Block: Complete Unit
Q1= Two Power Blocks: EH/Balance of Unit
A2= One, thru-the-door Disconnect: Complete Unit
C2= Two, thru-the-door Disconnects: SAF&RAF&CB/Balance of Unit
B2= Two, thru-the-door Disconnects: EHB/Balance of Unit
D2= Three thru-the-door Disc.: EH/SAF&RAF&CB/Balance of Unit
Code 12= Temperature Controls
MicroTech III Controls
LE= LonMark w/ Discharge Air Temp. Ctl.
LF= LonMark w/ Space or Zone Ctl.
BE= BACNet w/MSTP w/ Discharge Air Temp. Ctl.
BF= BACNet w/MSTP w/ Space or Zone Ctl.
EE= BACNet w/Ethernet w/ Discharge Air Temp. Ctl.
EF= BACNet w/Ethernet w/ Space or Zone Ctl.
SE= Standalone w/ Discharge Air Temp. Ctl.
SF= Standalone w/ Space or Zone Ctl.
No Controls
YM= No Temperature Controls w/floating point control
YC= No Temp. Ctls. w/6-9 volt DC modulating gas heat actuator
Code 13= Air Flow Controls
Y= None
1= 1 duct sensor
2= 2 duct sensors
3= 1 duct and 1 space sensor
4= 1 space sensor
5= Duct Hi Limit (DHL) sensor
Code 14= Inverters
Y= None
Separate Section
1= SA Fan only w/bypass 2= SA & RA Fans w/bypass
4= RA only w/bypass
No Separate Section
3= SA Fan only w/bypass 5= SA & RA Fans w/bypass
6= SA Fan only no bypass 7= SA & RA Fans no bypass
8= RA Fan only w/bypass 9= RA Fan only no bypass
Code 15= Inlet Vane/Damper Actuators or Inverter Type
Y= None A= ABB Inverter
G= Graham Inverter
R= Reliance Inverter
S= McQuay MD2, MD3, or MD6
F= Field Installed Inverter controlled by MTech
Code16= Smoke Detectors
Y= None 1= Return Air Fan Section
2= Supply Air Fan Section 3= 1 (RA) + 2 (SA)
Code 17= Misc. Aux. Controls
C G
Y= None
F= Freezestat (Steam or HW Heat only)
P= Phase Failure
G= Ground Fault Protection
L= Line Reactors (Inverter w/ separate section only)
A= Freezestat & Phase Failure (Steam or HW Heat only)
B= Freezestat & Ground Fault (Steam or HW Heat only)
C= Phase Failure & Ground Fault
D= Freezestat, Phase Failure & Ground Fault (Steam or HW Heat only)
E= Freezestat & Line Reactors (ST/HW Heat & Inverter w/separate section only)
H= Phase Failure & LIne Reactors (Inverter w/ separate section only)
J= Freezestat, P.F. & Line Reactors (ST/HW Heat & Inverter w/separate section only)
K= Ground Fault, Phase Failure & Line Reactors (Inverter w/ separate section only)
1= UV Lights
2= UV Lights + F
3= UV Lights + P
4= UV Lights + L
5= UV Lights + A
6= UV Lights + E
7= UV Lights + H
8= UV Lights + J
YY= None
AE= 100% Outside air damper w/hood & actuator
AY= 100% Outside air damper w/hood/no actuator
BE= 0- 30% Outdoor air section w/actuator
BY= 0- 30% Outdoor air section w/o actuator
DE= 0- 100% Econ. w/barometric exhaust damper w/act.
DY= 0- 100% Econ. w/barometric exhaust damper w/o act.
EE= 0- 100% Econ. w/power closure exhaust damper w/act.
EY= 0- 100% Econ. w/power closure exhaust damper w/o act.
HE= 0- 100% Econ. w/prop exhaust damper w/act.
HY= 0- 100% Econ. w/prop exhaust damper w/o act.
FE= same as DE + Design Flow
FY= same as DY + Design Flow
GE= same as EE + Design Flow
GY= same as EY + Design Flow
JE= same as HE + Design Flow
JY= same as HY + Design Flow
KE= same as DE + Ebtron Sensor
KY= same as DY + Ebtron Sensor
LE= same as EE + Ebtron Sensor
LY= same as EY + Ebtron Sensor
ME= same as HE + Ebtron Sensor
MY= same as HY + Ebtron Sensor
3E= Energy Recovery Economizer, Low CFM- 6”
4E= Energy Recovery Economizer, Low CFM- 12”
5E= Energy Recovery Economizer, High CFM- 6”
6E= Energy Recovery Economizer, High CFM- 12”
Code 21= Return Air Fan
YYYY= No Return Air Fan
40B()= 40” Airfoil Single Width
()= isolator type:
1= rubber in-shear
2= spring
3= spring w/seismic restraints
H= Modulating Gas Reheat
I= Seismic Construction - Code 21 and/or 31 must be ***1 or ***3
K= Modulating Hot Gas Reheat and Seismic Construction
Y= None
Code 49= Fan Section Options
A= SA Fan Belt Guard
B= SA Fan Section Light
C= A + B
D= SA & RA Fan Belt Guard
E= SA & RA Fan Section Light
F= D + E
Y= None
ACT3, 4 Actuator Motors, Economizer Dampers Economizer Section
ACT5 Actuator Motor, Discharge Isolation Damper Discharge Section
ACT6 Actuator Motor, Return Air Isolation Damper Return Air Section
ACT7 Actuator Motor, Heat Face/Bypass Coil Section, Heat
ACT8 Actuator Motor, Cool Face/Bypass Coil Section, Cool
ACT 10, 11 Actuator Motors, Exhaust Dampers Return Air Section
AFD10 Inverter, Supply Fan AFD or Supply Fan Sect.
AFD11 Inverter, Speedtrol Motor Condenser Section
AFD20 Inverter, Return Fan AFD or Supply Fan Sect.
AFD21 Inverter, Speedtrol Motor Condenser Section
AS Blower Air Switch Furnace Section
BM Burner Blower Motor Furnace Section
C10 Power Factor Capacitors, Supply Fan Supply Air Section
C20 Power Factor Capacitors, Return Fan Return Air Fan
CB10 Circuit Breaker, Supply Fan Main Control Box
CB20 Circuit Breaker, Return Fan Main Control Box
COMPR.1-6 Compressors Condenser Section
DAT Discharge Air Temperature Sensor Discharge section
DFLH Design Flow Sensor, Left Hand Return Section
DFRH Design Flow Sensor, Right Hand Return Section
DHL Duct High Limit Main Control Box
DS1 Disconnect, Total Unit or Condenser/Heat Main Control Box
DS2 Disconnect, SAF/RAF/Controls Main Control Box
DS3 Disconnect, Electric Heat Electric Heat Section
DS4 Disconnect, Condenser Cond. Control Box
DS6 Disconnect- Unit Supplied Line Voltage Condenser Section
EFT Entering Air Temperature Sensor Supply Fan Section
EXPA, B, D Expansion Board Main Expansion Board
F1, 1A Fuse, Control Circuit, T1 Primary Main Control Box
F1C Fuse, Control Circuit, T1 Secondary Main Control Box
F2 Fuse, Control Circuit Condenser Control Box
F3 Fuse, Burner Motor Main Control Box
F4 Fuse, T4 Transformer Main Control Box
F6A, B, C Fuse, Unit Supplied Line Voltage Condenser Section
F11 Fuse, Speedtrol Motor Main Control Box
F21 Fuse, 208V Speedtrol Motor Main Control Box
FB8 Fuseblock, Main Transformer Main Control Box
FB31-40 Fuseblocks, Electric Heat (Top Bank) Electric Heat Section
FB41-50 Fuseblocks, Electric Heat (Bottom Bank) Electric Heat Section
FD Flame Detector Furnace Section
FLC Fan Limit Control Furnace Section
FS1 Freezestat Coil Section, Heat/Cool
FSG Flame Safeguard Furnace Section
GCB1 Generic Condenser Board Main Control Box
GFS1/GFR1 Ground Fault Sensor/Relay, RPS Unit Main Control Box
GFS4/GFR4 Ground Fault Sensor/Relay, RCS Unit Cond. Control Box
GRD Ground All Control Boxes
GV1 Gas Valve, Pilot Furnace Section
GV2, 3 Gas Valves, Main Furnace Section
GV4-8 Gas Valve, Hi-Turn Down Furnace Section
Schematic Sym. Description Location
OL10 Overload Relays, Supply Fan Main Control Box
OL20 Overload Relays, Return Fan Main Control Box
OL 51,52, 53 Overload Relays, Prop Exhaust Fan Return Air Section
PB1 Powerblock, Total Unit or Cond./Heat Main Control Box
PB2 Powerblock, SAF/RAF/Controls Main Control Box
PB3 Powerblock, Electric Heat Electric Heat Section
PB4 Powerblock, Condenser Cond. Control Box
PB9, 10 Powerblock, Supply Fan Unit Split Junction Box
PB19, 20 Powerblock, Return Fan Unit Split Junction Box
PB31 Power Block, DS3 Power Distribution Electric Heat Control Box
PB41 Power Block, Power Distribution RCS Control Box
PC5 Pressure Control, Clogged Filter Filter Section
PC6 Pressure Control, Clogged Final Filter Final Filter Section
PC7 Pressure Control, Proof of Airflow Supply Air Filter
PC8 Pressure Control, Minimum Airflow Evaporator Coil Section
PC13, 23 Pressure Control, Fan Condenser Section
PVM1 Phase Voltage Monitor, RPS Unit Main Control Box
PVM4 Phase Voltage Monitor, RCS Unit Cond./Fuse Ctrl Box
R1, 2 Relays, High Pressure Reset Main/Cond. Control Box
R5.1- 8.1 Relays, Compressor, Safety/Cool Fail Main/Cond. Control Box
R9, 10 Relays, Compressor Lockout Main/Cond. Control Box
R11 Relays, Speedtrol Inverter Main/Cond. Control Box
R13.1, 14.1 Relays, Compressor, Safety/Cool Fail Main/Cond. Control Box
R12, 13, 14 Relays, Condenser Fans Main/Cond. Control Box
R17 Relays, Speedtrol Inverter Main/Cond. Control Box
R18, 19 Relays, Cool Failure Indicator Main Control Box
R20 Relay, HW, Steam or Electric Heat Main Control Box
R20, 21, 22 Relays, Gas Heat Furnace Section
R23 Relay, Gas Heat Valve or Electric Heat Furnace or Elec. Ht. CB
R24 Relay, Gas Heat Alarm Main Control Box
R25 Relay, Gas Heat Start, Supply Fan Inverter Main Control Box
R26 Relay, Occupied/Unoccupied Main Control Box
R27 Relay, Exhaust Dampers Main Control Box
R28 Relay, Isolation Dampers Main Control Box
R30 Relay, Cool Valve w/ F&B Main Control Box
R45 Relay, UV Lights Main Control Box
R46_47 Relay, Supply Fan Inverter increase/decrease Main Control Box
R48_49 Relay, Return Fan Inverter increase/decrease Main Control Box
R62 Relay, Special Main Control Box
R63 Return Air Inverter Main Control Box
R67 Relay, Supply Fan Enable Main Control Box
R68 Relay, Return Fan Enable Main Control Box
R69 Relay, Inverter Bypass VAV Box Interlock Main Control Box
R70 Relay, Special Main Control Box
R81, 82 Relay, Inverter Reset Main Control Box
R83- 88 Relays, Smoke Main Control Box
RAE Return Air Enthalpy Sensor Return Air Section
RAT Return Air Temperature Sensor Return Air Section
REC1 Receptacle, Main Box Main Control Box
REC2 Receptacle, Condenser Box Cond. Control Box
Schematic Sym. Description Location
REC3 Receptacle, Field Power, 115V Discharge Bulkhead
REC10-23 Receptacles, Cabinet Section Cabinet Sections
S1 Switch, System On/Off, RPS Unit Main Control Box
S2 Switch, System On/Off, RCS Unit Cond. Control Box
S3 Switch, Furnace On/Off Furnace Section
S4 Switch, Inverter Bypass On/Off Main Control Box
S6 Switch, Return Fan Vanes Adjustment Main Control Box
S7 Switch, Local On/Off/Auto to Controller Main Control Box
S10-22 Switches, Cabinet Section Lights Cabinet Sections
S40-45 Switches, Door Interlock, UV Lights Cabinet Sections
SD1 Smoke Detector, Supply Air Discharge Section
SD2 Smoke Detector, Return Air Return Air Section
SPS1, 2, 3 Static Pressure Sensors, Duct or Building Main Control Box
SPTRL Switch- Speedtrol Pressure Condenser Section
SR1-3 Sequence Relays, Electric Heat Electric Heat Section
SV1-4 Solenoid Valves, Liquid Discharge Bulkhead
SV5-8 Solenoid Valves, Hot Gas Discharge Bulkhead
T1 Transformer, Main Control Main Control Box
T2 Transformer, Unit 24V Main Control Box
T3 Transformer, Controller, 18V Main Control Box
T4 Transformer, Exhaust Dampers Main Control Box
T5 Transformer, Electric Heat Electric Heat Section
T6 Transformer, Unit Supplied 120V Power Condenser Section
T7 Transformer, Gas Pilot Valve Furnace Section
T8 Transformer, Gas Main Valve Furnace Section
TB1 Terminal Block, 115V, Field Main/Cond. Control Box
TB2 Terminal Block, 24V, Field Main/Cond. Control Box
TB3,4 Terminal Blocks, Condenser Cond. Control Box
TB5 Terminal Block, 115V, Factory Main/Cond. Control Box
TB6 Terminal Block, 115V/24V, Factory Main Control Box
TB7, 8 Terminal Block, 24V, Factory Main Control Box
TB10 Terminal Block, Heating Main Control Box
TB11 Terminal Block, Heating Electric Heat Section
TB12, 13 Terminal Blocks, Electric Heat, Power Electric Heat Section
TB25 Terminal 115V Factory Unit Split Junction Box
TB27, 28 Terminal 24V Factory Unit Split Junction Box
TC1, 2 Temperature Controls, FanTrol Cond. Control Box
TC12, 14 Temperature Control, Fantrol Cond. Control Box
TD1, 2 Time Delays, Compressor Lockout Main/Cond. Control Box
TD10 Time Delay, Hi-Turn Down Burner Furnace Section
TD20 Time Delay, Duct Hi Limit Main Control Box
TR1, 2 Transducer, Pressure Main Control Box
VM1 Valve Motor, Heating Heating Section
VM5 Valve Motor, Cooling Coil Section, Cool
VV1 Vent Valve Furnace Section
ZNT1 Zone Temperature Sensor, Control Field Installed
Codes 19 and 20 determine the base section. Code 19 is the Return Air Plenum, and determines if the unit has
back (a.k.a. horizontal) return air, bottom return air, or side return air. The plenum is required for any outdoor air
application with an economizer (Code 20= BE, BY, DE, DY, EE, EY, FE, FY, GE, GY, HE, HY, JE or JY) or Mixing
Box (C20= CE, CY). The only case in which a plenum is not required is when a 100% outdoor air damper and hood
are ordered (C20= AE, AY).
Codes 21, 22, 23 determine the return air fan, motor and drives. These codes only pertain to units with a 0-100%
economizer (C20= DE, DY, EE, EY, FE, FY, GE, GY, HE, HY, JE or JY). The fan section parts, the fans, and the
motors are listed in this section. The drive components (fan sheave, motor sheave, belt, and fan bushing) are
not listed as they are unique to the unit. If a drive component is required you may use the number from the
part and cross reference it with the Drive Components Cross Reference form number:
571006, or contact Daikin McQuay Parts to ensure that the needed part(s) are correctly identified. The motors
range anywhere from 2- 30 horsepower, and the fan wheel is 40”.
Code 06 determines the panels used in final cabinet assembly (return air units only).
Code 09, the voltage, is part of the motor part number identification.
Code 12, the control system comes into play when an economizer is present. The economizer comes with an
actuator motor on any MicroTech unit (C12= L*, B*, E* or S*, but may not have a motor if the unit has controls by
others (C12= YC or YM).
Code 14 determines if the return fan has an inverter, or variable frequency drive. If code 14 equals 1-9 then the
unit has inverters.
Code 15, determines the type of inverter used.
Code 16 determines if a smoke detector is located in the return air cabinet. If C16= 1 or 3, a smoke detector (SD2)
is present.
Code 17 determines the Enthalpy Control. If C17= Y* and the unit has an economizer there is a mechanical enthalpy
control (OAE). If C17= C*, there is a differential enthalpy control (OAE + RAE).
Code 48 determines if the unit is equipped with Hot Gas Reheat and/or IBC seismic construction. If Code 48 is I
then Code 21 must be ***1 or ***3.
Code 49 determines if the return air cabinet has a light, switch and receptacle (C49= B), fan belt guards (C49= D)
or both (C49= F).
Ref. Part Actuator Qty.
No. Description C20= AE C20= AY
4 Damper Assy 1 055979503 055979502 1
Damper Only 098313701 039813701 1
9 Liner 056132601 056132601 2
10 Panel- Hood Side 056131903 056131903 1
11 Panel- Hood Side 056131904 056131904 1
12 Panel- Hood Top 056131802 056131802 1
13 Louver 056132002 056132002 3
14 Channel- Support 056132303 056132303 2
15 Channel- Support 056132102 056132102 2
1
Complete assy includes the damper assy and linkage (no actuator) or actuator assy. For Damper components see the
following page.
Note: The outdoor air damper with actuator (C20= AE) must have MicroTech controls. Dampers without actuators (C20= AY)
must have controls by others (12= YM, YC).