sor 4
Disconnect Switch 5
Display 3
Remote Unit Display 4
Distribution Block 3
Door 8
Drain Cover 8
Duct Angle Support 8
E
Electric Heat 5
Electric Heating Element 3
Electric Module Support 5
Exhaust Fan 6
F
Fan Support 6
Fan Support Bracket 6
Filter Drier 7
Filters 8
Fuse 3
Fuse Clip 3
H
Heat Module 5
Exhaust Hood 8
Inlet Air Hood 8
I
Inlet Ring 6
L
Lifting Lug 8
LON® Communication Card 3
M
Damper Motor 5
Wheel Motor 5
Compressor Mounting Kit 7
O
Occupancy Switch 4
Overload Relay 3
P
Panel 8
Molded Plug 7
Dirty Filter Pressure Switch 3
High Pressure Switch 7
Low Pressure Switch 7
R
Rating Plate 2
Relay 3
Relay Module 3
Reversing Valve 7
Roof Curb 8
S
Humidity and Temperature Sensor 4
Indoor Air Quality (VOC and CO)
Sensor 4
Temperature Sensor 3
Serial No. 2
Shaft Extension 5
Sheave 6
Socket 3
Start/Stop Switch 4
Supply Fan 6
Air Proving Switch 3
T
Temperature Sensor 3
Terminal Block Kit for Controller 3
Terminal Bracket 3
Thermistor 7
Thermostatic Expansion Valve 7
Time Clock Wall Switch 4
Transformer 3
W
Enthalpy Wheel
Cassette 5
Wheel Segment 5
Wheel Supports 5
DANGER
This unit contains R-410A high pressure refrigerant. Hazards exist that could result
in personal injury or death. Installation, maintenance, and service should only be
performed by an HVAC technician qualied in R-410A refrigerant and using proper tools
and equipment. Due to much higher pressure of R-410A refrigerant, DO NOT USE service
equipment or tools designed for R22 refrigerant.
IMPORTANT: Do not release refrigerant to the atmosphere! If required service
procedures include the adding or removing of refrigerant, the service technician
must comply with all federal, state, and local laws. Service should only be performed
by a qualied HVAC technician.
Form P-ZQYRA (6-16), PN262961R10, Page 1
Rating Plate and Serial No.
Example of a Rating Plate
MERCER, PA. USA 16137
MADE IN MEXICO
FOR INDUSTRIAL/COMMERCIAL USE ONLY
SUITABLE FOR INDOOR OR OUTDOOR USE
MODEL [ A ][ B ]
SERIAL NO. [ ]
[ C ] VOLTS [ C ] PH [ C ] HZ
MINIMUM CIRCUIT AMPACITY (MCA)[ V } AMPS
MAXIMUM FUSE SIZE/*CIRCUIT BREAKER (MOP)[ W } AMPS
MINIMUM CIRCUIT AMPACITY (MCA)[ D } AMPS
MAXIMUM FUSE SIZE/*CIRCUIT BREAKER (MOP)[ E } AMPS
SHORT-CIRCUIT CURRENT: 5,000 RMS SYMMETRICAL, [ C ] V MAXIMUM
QTYFLAWATTS
SUPPLY AIR BLOWER MOTOR1[ F ][ G ]
QTYFLA[ U ]
EXHAUST AIR BLOWER MOTOR1[ H ][ J ]
QTYFLAHP
ENTHALPY WHEEL MOTOR1[ K ][ L ]
QTYRLA (EA)LRA (EA)
COMPRESSOR 1[ M ][ N ]
REFRIGERANT - R410A CHARGE - [ P ] LBS
TEST PRESSURES: HIGH 600 PSIG; LOW 45 PSIG
EQUIPPED FOR OPERATION AT SUPPLY AIR FLOW RANGE OF [ Q ] SCFM
AGAINST A STATIC PRESSURE RANGE OF [ R ] INCHES WATER COLUMN
WIRE DIAGRAM [ S ]
ELECTRIC HEAT [ T ] kW (if equipped)
*HACR TYPE REQUIRED PER NEC
Rating Plate Key
A = Model
B = Manufacture Date (month and year)
C = Volts/PH/HZ
D = Minimum Circuit Ampacity
E = Maximum Fuse Amps
F = Full Load Amps (supply air blower motor)
G = Watts (supply air blower motor)
H = Full Load Amps (exhaust air blower motor)
J = Watts or HP (exhaust air blower motor) - See U below.
K = Full Load Amps (enthalpy wheel motor)
L = HP (enthalpy wheel motor)
M = Rated Load Amps (compressor)
N = Locked Rotor Amps (compressor)
P = Refrigerant Charge (lbs of R410-A)
Q = Airow (SCFM)
R = Static Pressure (inches w.c.)
S = Wiring Diagram P/N
T = kW (electric heat)
U = Watts or HP Spec of J for Exhaust Blower Motor
(by option code) = A23 - HP; A24 - Watts
Decoding a Serial No.
Serial No. - ALL Models BEFORE June, 2015
Sample: BLL 00000 X
Elements: 1 | 2 | 3
Key:
1 = Date of Manufacture (See table below)
2 = Consecutive number
3 = Plant of Manufacture (X = Monterrey)
Serial No. - ALL Models AFTER June, 2015
Sample: BOF 3060 000000
Elements: 1 | 2 | 3
Key:
1 = Date of Manufacture (See table below)
2 = Plant of Manufacture (3060 = Mercer; 3062 = Monterrey)3 = Consecutive number
Date of Manufacture Code in the Serial No.
YearJanFebMarAprMayJuneJulyAugSeptOctNovDec
2010BJABJBBJCBJDBJEBJFBJGBJHBJIBJJBJKBJL
2011BKABKBBKCBKDBKEBKFBKGBKHBKIBKJBKKBKL
2012BLABLBBLCBLDBLEBLFBLGBLHBLIBLJBLKBLL
2013BMABMBBMCBMDBMEBMFBMGBMHBMIBMJBMKBML
2014BNABNBBNCBNDBNEBNFBNGBNHBNIBNJBNKBNL
2015BOABOBBOCBODBOEBOFBOGBOHBOIBOJBOKBOL
2016B PABPBBPCBPDBPEBPFBPGBPHBPIBPJBPKBPL
2017BQABQBBQCBQDBQEBQFBQGBQHBQIBQJBQKBQL
2018BRABRBBRCBRDBREBRFBRGBRHBRIBRJBRKBRL
2019BSABSBBSCBSDBSEBSFBSGBSHBSIBSJBSKBSL
2020B TABTBBTCBTDBTEBTFBTGBTHBTIBTJBTKBTL
Form P-ZQYRA (616), PN262961R10, Page 2
21 - Option
BE18
Dirty Filter
Switch
22 - Air Proving
Switch (exhaust),
P/N 197031 set
at 0.35” w.c.
22 - Air Proving Switch (supply),
P/N 197031 set at 0.35” w.c.
14 - Contactor (electric
preheat option)
14 - Contactor
(wheel)
15 - Contactor
(fans)
20 - Multi
Voltage
Relay Module
(time
schedule
clock,
Opt CN7A)
16 -
Distribution
Blocks -
A, B, and C
14 - Contactor
(heat pump)
Grounding
Lug
10 - Digital Controller
(Compressor)
Control Transformer
(optional damper motor)
Control
Transformers
1 - Unit Controller
(NOTE: If unit has
Opt BHB8 BACnet®
card (6 & 7) or Opt
BHB7 LONworks®
card (8 & 9), it is
located on the
controller.)
Field Connection
Terminal Blocks
4 - Display
Module
5 - Bracket
Terminal Blocks
14 - Contactor
(supplemental
heating element)
19 - Relay
(damper motor)
Controls on either the side or
back wall of the Control
Compartment
11 - Resistor
12
12
12
Electrical
Panel
13 - Transformer (Size 8, 460V)
(13A - Fuse Clip & 13B Time Delay Fuse - Not Shown)
17 & 18 - Supply & Exhaust
Fan Overload Relays
(18A - Terminal Bracket - Not Shown)
Electrical Controls
Electrical Compartment
Controls on Top
with Compressor Below
Supply
Horizontal
Air Opening
Air Opening
Horizontal Return
Model ZQYRA
CodeDescriptionZQYRASize 8Size 12
1Digital Controller, Carel (programmed) 263663 (1010784 After 4, 2016)
2Connection Cable for Controller260175
3Terminal Block Kit for Controller260176 (260177 After 4, 2016)
4Unit Display267178
5Display Bracket269895
6BacNet
7Bracket for BacNet
8
9Bracket for LON
®
Card (programmed)
®
Communication
LON
Card (programmed)
®
Card262743
®
Card262745
Option
BHB8
Option
262964
262963
BHB7
10 Compressor Digital Controller266067
11 Digital Control Resistor, 560K ohms268534
12 Transformer, 75 VA, 120/208-240/480 to 24208989
13 Transformer, 200VA, 460/3/60210862--