TECHNICAL GUIDE
MAXA-MI$ER
®
V* Series
Unitized Energy Recovery
Ventilators
ERV Unit with Predator® Packaged Unit
ERV Unit with Sunline® Packaged Unit
Energy recovery COMPONENT rated in
accordance with AHRI/ANSI Standard 1060-2005
and certified to AHRI. Actual performance in
packaged equipment may vary.
®
ERV Unit with Millennium® Packaged Unit
DESCRIPTION
246681-YTG-C-0611
• Reduces cooling load at design temperatures up to 4 tons per
1000 cfm of outside air.
• Reduces heating load up to 2.5 T ons Btuh per 1000 CFM of outside air.
• Dry energy transfer. Moisture in supply (intake) air stream is
transferred to exhaust air stream in a vapor state, eliminating
condensate plumbing from the UERV.
• Attaches directly to the York rooftop units. All mounting equipment is provided.
• Separate fused power supply. (Except Millennium or VR74 or
VR122)
• Filters / mist eliminators are provided on the entering air openings.
• Adjustable support legs are provided.
• Two modes of operation (Pivoting Wheel Models only)
• Recovery mode during normal energy recovery operation.
• True economizer mode when outside sensor calls for
economizer operation (3 - 12.5 ton packaged units
equipped with economizers). U. S. Patent 5,548,970.
• Pivoting wheel models used with packaged unit with economizer. Sequence of operation controlled by economizer controller. (Small Sunline and Predator Only)
• Balancing dampers provided on VR, VH and VU Modules.
(Except Millennium or VR74 and VR122)
• Centrifugal blowers (both intake and exhaust for high static
capability and low sound levels). (Except Millennium, VR74 and
VR122)
• Heavy gauge galvanized steel cabinets corrosion protected with
powder paint process that match York units.
• Fully insulated cabinet.
• AHRI certified internal enthalpy wheel is provided.
• Internal enthalpy wheel made of polymeric material with silica
gel impregnated into the material. The enthalpy wheel has a
five year limited warranty.
• Internal enthalpy wheels are easily cleanable. Large wheels (25
inch diameter and above) are split into easily removable pie
segments. Smaller wheels can be removed from the ERV.
• Continuous operation down to 10 ºF (-12 ºC) without defrost at
indoor relative humidity up to 40%. For temperatures below 10
ºF (-12 ºC), Optional Low Ambient Control Kit is required. Kit
includes temperature sensor to control the ERV before frost
build up can occur on recovery wheel.
®
Note: MAXA-MI$ER
rooftops using 14” high or greater roof curbs.
UERV’s are designed for use with
Note: Predator models ZF/ZH/ZJ/XP* 037-150, with
ERV must use “slab” type economizers and
downflow position.
FOR DISTRIBUTION USE ONLY - NOT TO BE USED AT POINT OF RETAIL SALE
ETL Certified per UL 1995 and CSA 22.2
TABLE OF CONTENTS
246681-YTG-C-0611
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
TABLE OF CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . 2
YORK UERV MODEL NOMENCLATURE . . . . . . . . . . . 3
APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
PRINCIPLE OF OPERATION . . . . . . . . . . . . . . . . . . . . .4
AHRI/ANSI STANDARD 1060-2005 FOR AIR-TO-AIR EN-
ERGY RECOVERY VENTILATION EQUIPMENT . . . . . 4
ENERGY RECOVERY WHEEL . . . . . . . . . . . . . . . . . . . .4
CROSS LEAKAGE IN UERV’S (PURGE SECTORS) . . . 5
OPTIONAL ACCESSORIES - FIELD INSTALLED . . . .5
OPTIONAL ACCESSORIES - FACTORY INSTALLED 6
HOW TO SELECT THE PROPER AIR
CONDITIONING UNIT AND UNITARY ENERGY RECOV-
ERY VENTILATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
LIST OF FIGURES
Fig. # Pg. #
1 UNITIZED ENERGY RECOVERY
VENTILATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2 ENERGY RECOVERY WHEEL . . . . . . . . . . . . . . . . . .6
3 “P” SERIES PIVOTING WHEEL FOR UNITS W/ECONO-
MIZERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4 UERV DIMENSIONAL DATA - 036 THROUGH 060 . 20
5 UERV DIMENSIONAL DATA - 037 THROUGH 150 (3 -
12 1/2 TONS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
6 UERV DIMENSIONAL DATA - 180 THROUGH 300 (15 -
25 TONS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
7 MILLENNIUM UNIT VR074 AND VR122 (25 - 40 TON)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 3
8 STAND ALONE UERV’S FOR SIDE BY SIDE DUCT AR-
RANGEMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
9 STAND ALONE UERV’S FOR OVER AND UNDER
DUCT ARRANGEMENTS . . . . . . . . . . . . . . . . . . . . . .26
GUIDE SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . 23
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
OPTIONS 23
SEQUENCE OF OPERATION: . . . . . . . . . . . . . . . . . . 24
UERV TROUBLESHOOTING GUIDE . . . . . . . . . . . . . 25
UERV BELOW 600 CFM WITH STATIONARY WHEEL
(NO ECONOMIZER) . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
UERV ABOVE 600 CFM WITH STATIONARY WHEEL
(NO ECONOMIZER) . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
UERV ABOVE 600 CFM WITH PIVOTING WHEEL (USED
WITH ECONOMIZER) . . . . . . . . . . . . . . . . . . . . . . . . . . 26
LIST OF TABLES
Tbl. # Pg. #
1 UERV OUTSIDE AIR CFM SELECTION BY CFM . . . . 5
2 PERFORMANCE - 3 THROUGH 12 1/2 TON UNITS . 7
3 PERFORMANCE - 15 THROUGH 25 TON UNITS . . . 8
4 PERFORMANCE - PIVOTING WHEEL MODELS . . . . 9
5 SPECIFICATIONS AND ELECTRICAL DATA - 300
THROUGH 550 CFM ERV’S . . . . . . . . . . . . . . . . . . . 10
6 SPECIFICATIONS AND ELECTRICAL DATA - 600
THROUGH 1700 CFM ERV’S . . . . . . . . . . . . . . . . . . 11
7 SPECIFICATIONS AND ELECTRICAL DATA - 1500
THROUGH 2800 CFM ERV’S . . . . . . . . . . . . . . . . . . 12
8 SPECIFICATIONS AND ELECTRICAL DATA - 2800
THROUGH 3600 CFM ERV’S . . . . . . . . . . . . . . . . . . 13
9 SPECIFICATIONS AND ELECTRICAL DATA - 3400
THROUGH 5600 CFM ERV’S . . . . . . . . . . . . . . . . . . 14
10 SPECIFICATIONS AND ELECTRICAL DATA - 5500
THROUGH 6200 CFM ERV’S . . . . . . . . . . . . . . . . . . 15
11 SPECIFICATIONS AND ELECTRICAL DATA - 6000
THROUGH 13000 CFM UERV’S . . . . . . . . . . . . . . . . 16
12 BLOWER PERFORMANCE CHART - VR074 . . . . . . 20
13 BLOWER PERFORMANCE CHART - VR122 . . . . . . 20
2 Unitary Products Group
246681-YTG-C-0611
028 A12 H
Product Category
V = Ventilator
Wheel Type
R = Rooftop Stationary
CFM*
006 = 300 to 550
011 = 600 to 1000
A06 = Small Sunline ZF/ZR/XP036-072
Additional Options
AA = No Options Installed
Duct Type
2= 208/230v-3ph
York UERV Model Nomenclature
H = High Speed**
Product Generation
1 = First Generation
Voltage
4= 460v-3ph
York Rooftop Cabinet
VR
4 A L2 1
O = Stand Alone Over and Under, Stationary
S = Stand Alone Side by Side
P = Rooftop Pivoting (036-060 & 078-150 only)
020 = 1100 to 1700
028 = 2200 to 2800** 1500 to 2200**
036 = 2800 to 3600
046 = 3400 to 4600
062 = 5500 to 6200** 4800 to 5600**
074 = 6000 to 8000
122 = 8000 to 13000
Blower Speed
M = Medium Speed**
V = Variable Speed
L = Constant Volume
5= 575v-3ph
9= 208/320v-1ph
A12 = 50” Predator ZF/ZH/ZR/XP*102-150, ZJ076-150
B12 = 42” Predator ZF/ZR/XP078-090, ZH0037-090, ZJ/ZR076-150
A15 = Large Sunline ZF180
A25 = Large Sunline ZF210-300, ZJ180-300, XP180-240
A40 = Millinnium 25, 30 and 40 Ton Package
A = No Selection on Rooftop Units
L1 = Low Ambient Kit (LAK)*
L2 = LAK & Motorized Outside Air (MOA)*
L3 = LAK, MOA & Stop-Start-Job (SSJ) (not used on P models)*
L4 = LAK, MOA, SSJ & Pressure Sensor (PS) (not used on P)
L5 = LAK & SSJ (not used on P models)*
L6 = LAK, SSJ & PS (not used on P models)
L7 = LAK & PS
L8 = LAK, MOA and PS
M1 = Motorized Outside Air (MOA)*
M2 = MOA, and Stop Start-Jog (SSJ) (not used on P models)*
M3 = MOA, SSJ and Pressure Sensor (PS) (not used on P models)
M4 = MOA and PS
S1 = Stop-Start-Job (SSJ) (not used on P models)*
S2 = SSJ and Pressure Sensor (PS) (not used on P models)
P1 = Pressure Sensor (PS)
* CFM is ERV wheel rating. This may vary depending on unit cabinet pressure drop.
** These CFM ranges are dependant upon blower motor selection.
YORK UERV MODEL NOMENCLATURE
Unitary Products Group 3
246681-YTG-C-0611
APPLICATIONS
Unitized Energy Recovery Ventilators (UERV) are used with
the York rooftop packaged units. The internal wheel provides
sensible and latent energy exchange between the entering
and exhaust air streams of a buildin g. Thi s al l ow s a su bstantial amount of the energy, which is normally lost in the
exhaust air stream to be returned into the entering air. Ideal
applications are areas that have cold or hot temperatures, or
areas that have high humidity or very low humidity (recover
exhaust air from buildings that have humidifiers to add
humidity). Application software is available to provide the
energy and dollar savings for all areas of the United States
and Canada.
PRINCIPLE OF OPERATION
The UERV enthalpy wheel contains parallel layers of a polymeric material that are impregnated with silica gel (desiccant). The wheel is located in the entering (intake) air and
exhaust air streams of the ventilation equipment. As the
wheel rotates through each air stream, the wheel surface
adsorbs sensible and latent energy. In the heating mode, the
wheel rotates to provide a constant transfer of heat from the
exhaust air stream to the colder intake air stream. During the
cooling season, the process is reversed. On units equipped
with an economizer (3 - 12.5 tons), the wheel pivots out of the
air stream to allow economizer to operate normally for "free
cooling" when outdoor temperature and humidity is acceptable. During economizer operation, the UERV exhaust
blower continues to run, providing power exhaust for the system. The intake blower is de-energized during economizer
operation.
AHRI/ANSI STANDARD 1060-2005 FOR AIR-TO-AIR ENERGY RECOVERY VENTILATION EQUIPMENT
The Air-Conditioning, Heating and Refrigeration Institute
(AHRI) issued Standard 1060-2005 to certify air-to-air energy
recovery ventilators. This standard deals specifically with the
ratings of the Energy Recovery Wheel that is incorporated
into the Energy Recovery Ventilator (ERV). All of the York
ERV's have an AHRI certified energy recovery wheel. The
data shown in the specification charts is the AHRI certified
ratings for the wheel. Actual performance in the ERV may
vary.
Critical Terms for Standard 1060 are as follows:
1. Effectiveness. The measured energy recovery effec-
tiveness not adjusted to account for that portion of the
psychrometric change in the leaving supply air (Station
2) that is the result of leakage of entering exhaust air
(Station 3) rather than exchange of heat or moisture
between the air streams.
2. Net Effectiveness. The measured recovery effective-
ness adjusted to account for that portion of the psychometric change in the leaving supply air (Station 2) that is
the result of leakage of the entering exhaust air (Station
3) rather than exchange of heat or moisture between the
air streams.
3. Exhaust Air Transfer Ratio (EATR). The tracer gas
concentration difference between the leaving supply air
(Station 2) and entering supply (outdoor) air stream (Station 1) divided by the tracer gas concentration in the
entering exhaust (return) air (Station 3) at the 100%
rated air-flow, expressed as a percentage.
4. Outdoor Air Correction Factor (OACF). The entering
supply (outdoor) airflow (Station 1) divided by the measured (gross) leaving supply airflow (Station 2).
ENERGY RECOVERY WHEEL
The heart of the Energy Recovery Ventilator is the Energy
Recovery Wheel (defined by AHRI as a rotary heat
exchanger). The wheel has a patented design of parallel layers of wrapped polymeric material that is impregnated with a
silica gel (desiccant). This unique design makes it the only
truly cleanable wheel on the market today. The small wheels
(30 inch diameter and smaller) are slide out cassettes, and
the larger wheels have pie segments that are removable for
cleaning.
FIGURE 1 - UNITIZED ENERGY RECOVERY
VENTILATOR
4 Unitary Products Group
FIGURE 2 - ENERGY RECOVERY WHEEL
246681-YTG-C-0611
CROSS LEAKAGE IN UERV’S (PURGE SECTORS)
to 20% higher to get the desired air intake, and the cost associated with it.
The issue of cross leakage in rotary wheel based UERV's
used in space conditioning applications is often misunderstood. As a result, many systems are installed with purge
sectors and the additional fan capacity required to allow
these sectors to function when in fact they are unnecessary.
A better understanding of the rational for the purge sector,
and its history , allows us to dispense with the purge sector, its
added first cost and continuing cost of operation.
A purge sector minimizes the carry over cross leakage from
the exhaust into the supply (outside air) air stream by shunting a portion of the supply air back into the exhaust air stream
In space conditioning applications, where the ventilation is
operating to maintain acceptable indoor air quality, there are
no contaminants in concentrations large enough to cause
concern. Cross leakage in the UERV system results in a
small amount of the exhaust air, typically less than 5% in balanced airflow, returning to the space. This is not contaminated air, as some would suggest. It is however air that
effectively never left the space. The operation cost of moving
this air is far less than that required for a purge sector. Do not
use the Y ork UER V's in applications that have concentrations
of contaminants.
across the seal separating the exhaust and supply. This is
required in industrial applications where the exhaust carries
contaminants. This typically results in air volume being 15%
TABLE 1: UERV OUTSIDE AIR CFM SELECTION BY CFM
Unit-Tons 300-550 600-1000 1100-1700 1500-2800 2800-3600 3400-4600 4800-5600 5500-6200 6000-8000 8000-13000
1.5 - 6 1.5 - 6
7.5 - 12.5 7.5 - 12.5 7.5 - 12.5
Rooftop
Stand Alone type ERV’s are available for all tonnage sizes.
15 - 25 15 - 25 15 - 25 15 - 25 15 - 25
Stand Alone ERV’s are available for equipment room applications.
OPTIONAL ACCESSORIES - FIELD INSTALLED
UERV Equipment Support - 8 inch (203 mm) high base for
support of the exhaust and intake end of the UERV. Must be
ordered separately from the UERV.
Equipment Support
Part No.
UERV
VR006 1ES0401
VR/P011 1ES0402
VR/P020 1ES0402
VR/P028 1ES0402
Equipment Support
Part No.
UERV
VR036 1ES0403
VR046 1ES0403
VR062 1ES0404
VR074
VR122
25 - 40 30 - 40
match the specified unit. See specification pages for required
curb. Must be ordered separately from UERV.
Stand Alone Balancing Damper - Balancing dampers are
used with VO and VS models when ERV is connected to the
rooftop unit, not to ductwork on the roof.
Roof Curb - A 14 or 24 inch (355 or 610 mm) roof curb is
required to match supply and exhaust openings of the UERV
with the rooftop units. Y ork provides a full line of roof curbs to
Unitary Products Group 5
246681-YTG-C-0611
Ventilator
Wheel Type
CFM = 2800
York Unit Cabinet Size
Blower Speed (H for High, M for Medium)
Voltage
Duct Type (A)
Option Code (see list above)
Generation
V
R
028 A12 H 4 A L3 1
OPTIONAL ACCESSORIES - FACTORY INSTALLED
Low Ambient Control Kit - Prevents frost formation on
energy wheel heat transfer surfaces by terminating the intake
blower operation when discharge air temperature falls below
a field selectable temperature setting. Intake blower operation resumes operation after temperature rises above the
adjustable temperature differential.
Pressure Sensor - Measurement device on the UERV to
determine airflow across the Wheel.
Motorized Intake Air Damper - Damper mounts in the outdoor air intake hood. It opens when the UERV is energized
and closes when de-energized.
Stop-Start-Jog - Function that rotates the Enthalpy Wheel
(non-pivoting models) on a preset timer to prevent contamination of the wheel during economizer operation.
ERV Option Codes (ex.: VR028A12H4AL3 would be an R28
series high speed 460 volt UERV with a Low Ambient kit,
Motorized Outside Air, and Stop-Start-Jog kit.)
L1 - Low Ambient Kit (LAK) *
L2 - LAK & Motorized. Outside Air (MOA) *
L3 - LAK, MOA, & Stop-Start-Jog (SSJ) *
L4 - LAK, MOA, SSJ, & Pressure Sensor (PS)
L5 - LAK and SSJ *
L6 - LAK, SSJ, and PS
L7 - LAK and PS
L8 - LAK, MOA, and PS
M1 - Motorized Outside Air (MOA) *
M2 - MOA and Stop-S tart-Jog (SSJ) *
M3 - MOA, SSJ, and Pressure Sensor (PS)
M4 - MOA and PS
S1 - Stop-Start-Jog (SSJ) *
S2 - SSJ and Pressure Sensor (PS)
P1 - Pressure Sensor (PS)
NOTE: * denotes only options available for VR074 & VR122.
HOW TO SELECT THE PROPER AIR CONDITIONING UNIT AND UNITARY ENERGY RECOVERY VENTILATOR
1. Determine the air conditioning load requirements with
the required amount of outside air without an UERV.
2. Select the proper UERV for the outside air CFM require-
ments and calculate the tonnage reduction through the
York UERV software program.
3. Select the air conditioning unit required by reducing the
load determined in step 1 by the reduction in step 2.
(Example: If the load in Step 1 was 10 tons, and the
reduction in Step 2 was 2.5 tons, select a 7.5 ton unit.)
4. Select the proper UERV based on the select unit. The
York part numbering scheme is as follows:
6 Unitary Products Group
246681-YTG-C-0611
TABLE 2: PERFORMANCE - 3 THROUGH 12 1/2 TON UNITS
“R” Series Stationary Wheel for Units without Economizers
York
Packaged Unit
Model No.
Small Sunline
ZF036-060
ZR036-060
XP036-060
(42”)
Short Predator
ZH037-090
ZF078-090
ZJ037-061
ZR037-090
(50”)
Tall Predator
ZF102-150
ZH102-150
ZJ078-150
XP102-150
ZR102-150
Unit
Size
(Tons)
3 - 6
3 - 7.5
6 - 12.5
ERV CFM
Range
300-550 VR006A06H
600-1000 VR011A06H
300-550 VR006B06H
600-1000 VR011B12H
11 00-1700 VR020B12H
600-1000 VR011A12H
11 00-1700 VR020A12H
1500-2200 VR028A12M
2200-2800 VR028A12H
Matching ERV
Model
V oltage &
Phase
110v-1ph 1
208/230v-1ph 9
208/240v-3ph 2
460v-3ph 4
208/230v-1ph 9
208/230v-3ph 2
460v-3ph 4
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
Voltage
Code
Nominal AHRI Data (Total
CFM
500 65% 64%
900 73% 72%
500 65% 64%460v-3ph 4
900 73% 72%460v-3ph 4
1600 65% 64%460v-3ph 4
900 73% 72%460v-3ph 4
1600 65% 64%460v-3ph 4
1950 71% 70%460v-3ph 4
2600 65% 63%460v-3ph 4
Net Effectiveness
Heating Cooling
Note 1: Complete York ERV model number includes the electrical information. Example ZF 060
needing 500 CFM outside of air at 230 volts/3 phase. Model would be a VR006A06H2AAA1.
Unitary Products Group 7
246681-YTG-C-0611
TABLE 3: PERFORMANCE - 15 THROUGH 25 TON UNITS
Use this table to determine ventilation and size requirements. Table shows York packaged units and matching ERV model,
Air Flow Range, and AHRI rated Net Effectiveness at 100% of rated CFM.
“R” Series Stationary Wheel for Units without Economizers
York
Packaged Unit
Model No.
Large Sunline
ZF180
ZJ180
ZR180
XP180
Large Sunline
ZJ210-300
ZR240-300
ZF210-300
XP240
Millennium
Z32
Z33
Z34
Note 1: Complete York ERV model number includes the electrical information. Example: ZJ180 needing 2800 CFM
outside of air at 230 volts/3 phase. Model would be a VR028A15H2AAA1.
Note 2: For VR074 and VR122 units used with an economizer must have the Start-Stop-Jog (SSJ) option.
Unit
Size
(Tons)
15
17.5 - 25
25-40
ERV CFM
Range
1500-2200 VR028A25H
2200-2800 VR028A25H
2800-3600 VR036A15H
3400-4600 VR046A15H
4800-5600 VR062A25M
5500-6200 VR062A25H
2200-2800 VR028A25H
2800-3600 VR036A25H
3400-4600 VR046A25H
4800-5600 VR062A25M
5500-6200 VR062A25H
6000-8000 VR074A40*
8000-13000 VR122A40*
Matching ERV
Model
Voltage &
Phase
208/230v-3ph 2
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
208/230v-3ph 4
575v-3ph 2
208/230v-3ph 2
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
Voltage
Code
Nominal AHRI Data (Total
CFM
1950 71% 70%460v-3ph 4
2600 65% 63%460v-3ph 4
3100 65% 63%460v-3ph 4
3900 65% 63%460v-3ph 4
4125 71% 70%460v-3ph 4
5500 65% 63%460v-3ph 4
2600 65% 63%460v-3ph 4
3100 65% 63%460v-3ph 4
3900 65% 63%460v-3ph 4
4125 71% 70%460v-3ph 4
5500 65% 63%460v-3ph 5
6600 65% 63%460v-3ph 4
10800 65% 63%460v-3ph 4
Net Effectiveness
Heating Cooling
8 Unitary Products Group
246681-YTG-C-0611
Enthalpy Wheel
(with removable pie
segments)
Air Blower
(
)
e
Air Blower
(energized)
Air Blower
Fresh Air Damper
(opens during economizer
operation)
local code approval
)
Enthalpy Wheel
Discharge Air Stream
TABLE 4: PERFORMANCE - PIVOTING WHEEL MODELS
“P” Series Pivoting Wheel for Units with Economizers
York
Packaged Unit
Model No.
Small Sunline
ZF036-060
ZR036-060
XP036-060
Short Predator (42”)
ZH037-090
ZF078-090
ZJ037-061
ZR037-090
XP078-090
Tall Predator (50”)
ZF102-150
ZH102-150
ZJ078-150
XP102-150
ZR102-150
Note 1: Complete York ERV model number includes the electrical information. Example ZF 060
Unit
Size
(Tons)
3 - 6
ERV
CFM
Range
600-
1000
600-
1000
7.5 - 8.5
1100-
1700
600-
1000
1100-
6.5 -
12.5
1700
1500-
2200
2200-
2800
needing 800 CFM outside of air at 230 volts/3 phase. Model would be a VP011A06H2AAA1.
2: Predator models ZF/ZH/ZJ/XP* 037-150, with ERV must use “slab” type economizers and downflow
position.
Max.
CFM
Power
Exhaust
Matching
ERV
Model
1900 VP011A06H
1900 VP011B12H
3000 VP020B12H
1900 VP011A12H
3000 VP020A12H
3450 VP028A12M
4200 VP028A12H
Voltage &
Phase
Voltage
Code
208/230v-1ph 9
208/240v-3ph 2
460v-3ph 4
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
208/230v-3ph 2
575v-3ph 5
Nominal AHRI Data (T otal
Net Effectiveness
CFM
Heating Cooling
900 73% 72%
900 73% 72%460v-3ph 4
1600 65% 64%460v-3ph 4
900 73% 72%460v-3ph 4
1600 65% 64%460v-3ph 4
1950 71% 70%460v-3ph 4
2600 65% 63%460v-3ph 4
Pivoted out of Intake and
Outsid
Exhaust
energized
Exhaust
Unit & UERV Disconnect
(provided correct wire size used
for both units and
FIGURE 3 - “P” SERIES PIVOTING WHEEL FOR UNITS W/ECONOMIZERS
Unitary Products Group 9
TABLE 5: SPECIFICATIONS AND ELECTRICAL DATA - 300 THROUGH 550 CFM ERV’S
VS006 - S/S Stand Alone Stationary
Model Numbers
Line Voltage - 60hz 115v-1ph 208/230v/460-1ph 208/230v/460-3ph
Motor - hp / type 0.25 / PSC
Wheel Size (dia x width) - in 5.5 x 6.3
Fresh Air
Blower
Exhaust Air
Blower
Wheel
Electrical
Data
Total
Electrical
Wheel
Data
Enthalpy
Wheel AHRI
Rating Data
Thermal Ratings @ 0” Pressure Diff. Sensible Latent Total
Total
Effectiveness
Net
Effectiveness
Curb A/C Unit Curb Height - in 14
Weights
Note: 1: A st epdown transformer is provided to stepdown high voltage primary to 115 volt secondary.
Motor Speed - rpm 1780
Motor Speed(s) 2
Bearing Type Sleeve
Full Load Amps 3.8
Service Factor 1.1
Motor - hp 0.25 / PSC
Wheel Size (dia x width) - in 5.5 x 6.3
Motor Speed - rpm 1780
Motor Speed(s) 2
Bearing Type Sleeve
Full Load Amps-Stationary 3.8
Service Factor 1.1
Potential Volts 115
Motor Speed (RPM)/Wheel (RPM) 1050/68
Full Load Amps 0.7
MCA 8.7
OCPD 10
Wheel Depth 2
Wheel Diameter 19.3
Construction / Media Type One Piece / Polymeric
Nominal Airflow CFM 500 @ .6
EATR - -0.50 H
EATR - 0.00 H
EATR - +0.50 H
OACF - -0.50 H
OACF - 0.00 H
OACF - +0.50 H
O9.90%
2
O0.20%
2
O0.00%
2
O1.02%
2
O1.33
2
O1.59%
2
100% Airflow Heating 68% 60% 65%
75% Airflow Heating 73% 65% 70%
100% Airflow Cooling 68% 60% 64%
75% Airflow Cooling 73% 65% 69%
100% Airflow Heating 68% 60% 65%
75% Airflow Heating 73% 65% 70%
100% Airflow Cooling 68% 60% 64%
75% Airflow Cooling 73% 65% 69%
Shipping Weight - lbs. 198
Net Weight - lbs. 155
VR006 - Rooftop Stationary
VO006 - O/U Stand Alone Stationary
246681-YTG-C-0611
10 Unitary Products Group
246681-YTG-C-0611
TABLE 6: SPECIFICATIONS AND ELECTRICAL DATA - 600 THROUGH 1700 CFM ERV’S
VR011 - Rooftop Stationary
Model Numbers
VP011 - Rooftop Pivoting
VO011 - O/U Stand Alone
VS011 - S/S Stand Alone
Line Voltage - 60hz 208/ 230v-1ph 208/ 230v-3ph 460v- 1ph 460v-3ph 208/230v-3ph 460v-3ph 575v-3ph
Motor - hp / type .5 / PSC 1.0 / Belt
Wheel Size (dia x width) - in 10 x 6 AT 9 x 9
Fresh Air
Blower
Exhaust
Blower
Wheel
Electrical
Electrical
Wheel
Enthalpy
Wheel
Rating
Thermal Ratings @ 0” Pressure Diff. Sensible Latent Total Sensible Latent Total
Effec-
Effec-
Weights
Motor Speed - rpm 1120 / 960 / 850 1725
Motor Speed(s) 3 Adjustable Sheave
Bearing Type Sleeve Ball
Full Load Amps 3.4 3.8 1.9 1.4
Service Factor 1 1.15
Motor - hp Stationary .5 / PSC 1.0 / Belt
Motor - hp Pivoting .5 / PSC 1.5 / Belt
Wheel Size (dia x width) - in 10 x 6 AT 9 x 9
Motor Speed - rpm 1120 / 960 / 850 1725
Air
Motor Speed(s) 3 Adjustable Sheave
Bearing Type Sleeve Ball
Full Load Amps-Stationary 3.4 3.4 1.5 1.5 3.8 1.9 1.4
Full Load Amps-Pivoting 3.4 3.4 1.5 1.5 5.6 2.8 2.0
Service Factor 1 1.15
Potential Volts 208 / 230 208 / 230
Motor Speed (RPM)/Wheel
(RPM)
Data
Full Load Amps 0.3 0.3
MCA - Stationary 8.25 8.25 4.4 4.4 8.85 4.58 3.45
OCPD - Stationary 10 10 6 6 12 6 5
Total
MCA - Pivoting 8.25 8.25 4.4 4.4 11.1 5.7 4.2
OCPD - Pivoting 10 10 6 6 15 8 6
Wheel Depth - in 3 3
Diameter - in 25.3 30.346
Data
Construction / Media Type Segmented / Polymeric Segmented / Polymeric
Nominal Airflow CFM 900 @ 1.0 1600 @ .95
EATR - -1.00 H
EATR - 0.00 H
EATR - +1.00 H
AHRI
OACF - -1.00 H
Data
OACF - 0.00 H
OACF - +1.00 H
100% Airflow Heating 76% 68% 73% 68% 61% 65%
Total
75% Airflow Heating 81% 73% 78% 72% 67% 71%
tive-
100% Airflow Cooling 76% 68% 72% 68% 61% 64%
ness
75% Airflow Cooling 81% 73% 76% 72% 67% 70%
100% Airflow Heating 76% 68% 73% 68% 61% 65%
Net
75% Airflow Heating 81% 73% 78% 72% 67% 71%
tive-
100% Airflow Cooling 76% 68% 72% 68% 61% 64%
ness
75% Airflow Cooling 81% 73% 76% 72% 67% 70%
Curb A/C Unit Curb Height - in 14 on A06 24
Shipping Weight - lbs. 318 425
Net Weight - lbs. 245 345
Note: 1. Pivoting electrical data applies to VP models only.
O 9.30% 7.80%
2
O 0.70% 0.40%
2
O 0.00% 0.00%
2
O 0.97% 0.97%
2
O 1.19% 1.16%
2
O 1.34% 1.29%
2
1050/56 1050/46
VR020 - Rooftop Stationary
VP020 - Rooftop Pivoting
VO020 - O/U Stand Alone
VS020 - S/S Stand Alone
Unitary Products Group 11
TABLE 7: SPECIFICATIONS AND ELECTRICAL DATA - 150 0 THROUGH 2800 CFM ERV’S
246681-YTG-C-0611
Model Numbers
* VP028 - Rooftop Pivoting
VS028 - S/S Stand Alone
VO028 - O/U Stand Alone
Line Voltage - 60hz 208/230v-3ph 460v-3ph 575v-3ph 208/230v-3ph 460v-3ph 575v-3ph
Motor - hp / type 1.5 / Belt 2 / Belt
Wheel Size (dia x width) - in 10 x 10 10 x 10
* VR028 - Rooftop Stationary
Fresh Air
Blower
Exhaust
Blower
Wheel
Electrical
Data
Total
Electrical
Wheel
Data
Enthalpy
Wheel
AHRI
Rating
Data
Total
Effective-
ness
Effective-
ness
Curb A/C Unit Curb Height - in 24 on A12, 14 on A15 & A25 24 on A12, 14 on A15 & A25
Weights
Note: Pivo ting electrical data applies to VP models only.
Motor Speed - rpm 1725 1725
Motor Speed(s) Adjustable Sheave Adjustable Sheave
Bearing Type Ball Ball
Full Load Amps 5.6 2.8 2 7.0 3.5 2.4
Service Factor 1.15 1.15
Motor - hp Stationary 1.5 / Belt 2 / Belt
Motor - hp Pivoting 3 / Belt Wheel Size (dia x width) - in 10 x 10 10 x 10
Motor Speed - rpm 1725 1725
Air
Motor Speed(s) Adjustable Sheave Adjustable Sheave
Bearing Type Ball Ball
Full Load Amps-Stationary 5.6 2.8 2 7.0 3.5 2.4
Full Load Amps-Pivoting 9 4.4 3.6 - - Service Factor 1.15 1.15
Motor - hp (1 phase) 0.17 0.17
Potential Volts 200-208 / 230 200-208 / 230
Motor Speed (RPM)/Wheel (RPM) 825/58 825/58
Full Load Amps 0.6 0.6
MCA - Stationary 13.2 6.9 5.1 16.4 8.5 6
OCPD - Stationary 20 10 7 20 10 7
MCA - Pivoting 17.5 8.9 7.1 - - OCPD - Pivoting 25 12 10 - - Wheel Depth x Diameter - in 3 x 37.759 3 x 37.759
Construction / Media Type Segmented Pies / Polymeric Segmented Pies / Polymeric
Nominal Airflow CFM 2600 @ .95 2600 @ .95
EATR - -1.00 H
EATR - 0.00 H
EATR - +1.00 H
OACF - -1.00 H
OACF - 0.00 H
OACF - +1.00 H
O 6.10% 6.10%
2
O 0.40% 0.40%
2
O 0.00% 0.00%
2
O 0.99% 0.99%
2
O 1.13% 1.13%
2
O 1.23% 1.23%
2
Thermal Ratings @ 0” Pressure Diff. Sensible Latent Total Sensible Latent Total
100% Airflow Heating 68% 60% 65% 68% 60% 65%
75% Airflow Heating 74% 67% 71% 74% 67% 71%
100% Airflow Cooling 68% 60% 63% 68% 60% 63%
75% Airflow Cooling 74% 67% 70% 74% 67% 70%
100% Airflow Heating 68% 60% 65% 68% 60% 65%
Net
75% Airflow Heating 74% 67% 71% 74% 67% 71%
100% Airflow Cooling 68% 60% 63% 68% 60% 63%
75% Airflow Cooling 74% 67% 70% 74% 67% 70%
Shipping Weight - lbs. 470 470
Net Weight - lbs. 395 395
* Electric data is for (A12) ZH/ZF/ZJ 078-150 and XP 078-150 only.
** Electric da ta is for (A15 and A25) ZH/ZF/ZJ 180-300 and XP 180 and 240 only.
12 Unitary Products Group
246681-YTG-C-0611
TABLE 8: SPECIFICATIONS AND ELECTRICAL DATA - 2800 THROUGH 3600 CFM ERV’S
Model Numbers
VR036 - Rooftop Stationary
VS036 - S/S Stand Alone
VO036 - O/U Stand Alone
Line Voltage - 60hz 208/230v-3ph 460v-3ph 575v-3ph 208/230v-3ph 460v-3ph 575v-3ph
Motor - hp / type 2 / Belt 2 / Belt
Wheel Size (dia x width) - in 12 x 9 12 x 9
Fresh Air
Blower
Motor Speed - rpm 1725 1725
Motor Speed(s) Adjustable Sheave Adjustable Sheave
Bearing Type Ball Ball
Full Load Amps 7.0 3.5 3.2 7.0 3.5 2.4
Service Factor 1.15 1.15
Motor - hp Stationary 3 / Belt 2 / Belt
Wheel Size (dia x width) - in 12 x 9 12 x 9
Exhaust Air
Blower
Motor Speed - rpm 1725 1725
Motor Speed(s) Adjustable Sheave Adjustable Sheave
Bearing Type Ball Ball
Full Load Amps-Stationary 7.0 3.5 3.2 7.0 3.5 2.4
Service Factor 1.15 1.15
Motor - hp (1 phase) 0.50 0.50
Wheel
Electrical
Data
Potential Volts 200-208 / 230 200-208 / 230
Motor Speed (RPM)/Wheel
(RPM)
1725/64 1725/64
Full Load Amps 1.2 1.2
Total
Electrical
Wheel
Data
MCA - Stationary 16.4 8.6 6.6 16.4 8.6 6.6
OCPD - Stationary 25 12 9 25 12 9
Wheel Depth x Diameter - in 3 x 41.825 3 x 41.825
Construction / Media Type Segmented Pies / Polymeric Segmented Pies / Polymeric
Nominal Airflow CFM 3100 @ .9 3100 @ .9
O 4.90% 4.90%
2
O 1.30% 1.30%
2
O 0.30% 0.30%
2
O 0.99% 0.99%
2
O 1.07% 1.07%
2
O 1.12% 1.12%
2
Enthalpy
Wheel AHRI
Rating Data
EATR - -1.00 H
EATR - 0.00 H
EATR - +1.00 H
OACF - -1.00 H
OACF - 0.00 H
OACF - +1.00 H
Thermal Ratings @ 0” Pressure Diff. Sensible Latent Total Sensible Latent Total
100% Airflow Heating 68% 60% 65% 68% 60% 65%
Total
Effective-
ness
75% Airflow Heating 74% 67% 71% 74% 67% 71%
100% Airflow Cooling 68% 60% 63% 68% 60% 63%
75% Airflow Cooling 74% 67% 70% 74% 67% 70%
100% Airflow Heating 68% 60% 65% 68% 60% 65%
Net
Effective-
ness
75% Airflow Heating 74% 67% 71% 74% 67% 71%
100% Airflow Cooling 68% 60% 63% 68% 60% 63%
75% Airflow Cooling 74% 67% 70% 74% 67% 70%
Curb A/C Unit Curb Height - in 24 24
Weights
Shipping Weight - lbs. 571 571
Net Weight - lbs. 475 475
Unitary Products Group 13
TABLE 9: SPECIFICATIONS AND ELECTRICAL DATA - 340 0 THROUGH 5600 CFM ERV’S
246681-YTG-C-0611
Model Numbers VS046 - S/S Stand Alone
VR046 - Rooftop Stationary
VO046 - O/U Stand Alone
Line Voltage - 60hz 208/230v-3ph 460v-3ph 575v-3ph 208/230v-3ph 460v-3ph 575v-3ph
Motor - hp / type 5 / Belt 3 / Belt
Wheel Size (dia x width) - in 12 x 12 12 x 12
Fresh Air
Blower
Motor Speed - rpm 1725 1725
Motor Speed(s) Adjustable Sheave Adjustable Sheave
Bearing Type Ball Ball
Full Load Amps 12.8 6.4 5.1 9.4 4.3 3.4
Service Factor 1.15 1.15
Motor - hp Stationary 5 / Belt 3 / Belt
Wheel Size (dia x width) - in 12 x 12 12 x 12
Exhaust Air
Blower
Motor Speed - rpm 1725 1725
Motor Speed(s) Adjustable Sheave Adjustable Sheave
Bearing Type Ball Ball
Full Load Amps-Stationary 12.8 6.4 5.1 9 4.4 3.6
Service Factor 1.15 1.15
Motor - hp (1 phase) 0.5 0.5
Wheel
Electrical
Data
Potential Volts 200-208 / 230 200-208 / 230
Motor Speed (RPM)/Wheel
(RPM)
1075/57 1075/57
Full Load Amps 1.2 1.2
Total
Electrical
Wheel
Data
MCA - Stationary 30 15.6 12 22 11 9.1
OCPD - Stationary 40 25 15 30 15 12
Wheel Depth x Diameter - in 3 x 46.776 3 x 46.776
Construction / Media Type Segmented Pies / Polymeric Segmented Pies / Polymeric
Nominal Airflow CFM 3900 @ .95 3900 @ .95
O 4.40% 4.40%
2
O 1.10% 1.10%
2
O 0.20% 0.20%
2
O 0.99% 0.99%
2
O 1.06% 1.06%
2
O 1.11% 1.11%
2
Enthalpy
Wheel AHRI
Rating Data
EATR - -1.00 H
EATR - 0.00 H
EATR - +1.00 H
OACF - -1.00 H
OACF - 0.00 H
OACF - +1.00 H
Thermal Ratings @ 0” Pressure Diff. Sensible Latent Total Sensible Latent Total
100% Airflow Heating 68% 60% 65% 68% 60% 65%
Total
Effective-
ness
75% Airflow Heating 73% 67% 71% 73% 67% 71%
100% Airflow Cooling 68% 60% 63% 68% 60% 63%
75% Airflow Cooling 73% 67% 70% 73% 67% 70%
100% Airflow Heating 68% 60% 65% 68% 60% 65%
Net
Effective-
ness
75% Airflow Heating 73% 67% 71% 73% 67% 71%
100% Airflow Cooling 68% 60% 63% 68% 60% 63%
75% Airflow Cooling 73% 67% 70% 73% 67% 70%
Curb A/C Unit Curb Height - in 24 24
Weights
Shipping Weight - lbs. 920 920
Net Weight - lbs. 805 805
14 Unitary Products Group
246681-YTG-C-0611
TABLE 10: SPECIFICATIONS AND ELECTRICAL DATA - 5500 THROUGH 6200 CFM ERV’S
Model Numbers
VR062 - Rooftop Stationary
VO062 - O/U Stand Alone
VS062 - S/S Stand Alone
Line Voltage - 60hz 208/230v-3ph 460v-3ph 575v-3ph 208/230v-3ph 460v-3ph 575v-3ph
Motor - hp / type 5 / Belt 5 / Belt
Wheel Size (dia x width) - in 12 x 12 12 x 12
Fresh Air
Blower
Motor Speed - rpm 1725 1725
Motor Speed(s) Adjustable Sheave Adjustable Sheave
Bearing Type Ball Ball
Full Load Amps 15 7.4 5.8 15 7 5.8
Service Factor 1.15 1.15
Motor - hp Stationary 5 / Belt 5 / Belt
Wheel Size (dia x width) - in 12 x 12 12 x 12
Exhaust Air
Blower
Motor Speed - rpm 1725 1725
Motor Speed(s) Adjustable Sheave Adjustable Sheave
Bearing Type Ball Ball
Full Load Amps-Stationary 14.8 7 5.1 14.8 7 5.1
Service Factor 1.15 1.15
Motor - hp (1 phase) 0.5 0.5
Wheel
Electrical
Data
Potential Volts 200-208 / 230 200-208 / 230
Motor Speed (RPM)/Wheel
(RPM)
1075/54 1075/54
Full Load Amps 1.2 2.7
Total
Electrical
Wheel
Data
MCA - Stationary 34.8 17.5 13.6 34.8 17.5 13.6
OCPD - Stationary 40 25 20 40 25 20
Wheel Depth x Diameter - in 3 x 52.026 3 x 52.026
Construction / Media Type Segmented Pies / Polymeric Segmented Pies / Polymeric
Nominal Airflow CFM 5500 @ .95 5500 @ .95
O 4.00% 4.00%
2
O 1.00% 1.00%
2
O 0.20% 0.20%
2
O 0.99% 0.99%
2
O 1.06% 1.06%
2
O 1.10% 1.10%
2
Enthalpy
Wheel AHRI
Rating Data
EATR - -1.00 H
EATR - 0.00 H
EATR - +1.00 H
OACF - -1.00 H
OACF - 0.00 H
OACF - +1.00 H
Thermal Ratings @ 0” Pressure Diff. Sensible Latent Total Sensible Latent Total
100% Airflow Heating 68% 60% 65% 68% 60% 65%
Total
Effective-
ness
75% Airflow Heating 73% 67% 71% 73% 67% 71%
100% Airflow Cooling 68% 60% 63% 68% 60% 63%
75% Airflow Cooling 73% 67% 70% 73% 67% 70%
100% Airflow Heating 68% 60% 65% 68% 60% 65%
Net
Effective-
ness
75% Airflow Heating 73% 67% 71% 73% 67% 71%
100% Airflow Cooling 68% 60% 63% 68% 60% 63%
75% Airflow Cooling 73% 67% 70% 73% 67% 70%
Curb A/C Unit Curb Height - in 24 24
Weights
Shipping Weight - lbs. 1250 1250
Net Weight - lbs. 1075 1075
Unitary Products Group 15
246681-YTG-C-0611
TABLE 11: SPECIFICATIONS AND ELECTRICAL DATA - 6000 THROUGH 13000 CFM UERV’S
UERV Series VR074 VR122
Line Voltage - 60hz 208/230v-3ph 460v-3ph 575v-3ph 208/230v-3ph 460v-3ph 575v-3ph
Motor - hp (2) 5 / Belt (2) 7.5 / Belt
Wheel Size (dia x width) - in (2) 12 x 12 (2) 15 x 15
Motor Speed - rpm 1725 1725
Exhaust Air
Blower
Wheel
Electrical
Data
Total
Electrical
Wheel
Data
Enthalpy
Wheel
Airflow Data
Thermal Ratings @ 0” Pressure Diff. Sensible Latent Total Sensible Latent Total
Total
Effective-
ness
Net
Effective-
ness
Curb A/C Unit Curb Height - in 14 14
Weights
Motor Speed(s) Adjustable Sheave Adjustable Sheave
Bearing Type Ball Ball
Full Load Amps 14.8 7 5 22.4 9.7 7.8
OCPD 20 9 7 30 15 10
Service Factor 1.15 1.15
Motor - hp (3 phase) 0.25 0.25 0.25 0.25 0.25 0.25
Motor Speed (RPM)/Wheel
(RPM)
850/49 850/51
Full Load Amps 2.5 1.2 0.95 2.5 1.2 0.95
OCPD 322322
MCA 34.9 16.6 12.7 52 22.6 19
OCPD 50 20 15 70 30 25
Wheel Depth x Diameter - in 3 x 58 3 x 74
Construction / Media Type Segmented Pies / Polymeric Segmented Pies / Polymeric
Nominal Airflow CFM 6600 @ .95 10800 @ .95
EATR - -1.00 H
EATR - 0.00 H
EATR - +1.00 H
OACF - -1.00 H
OACF - 0.00 H
OACF - +1.00 H
O 4.60% 3.40%
2
O 1.90% 1.20%
2
O 0.90% 0.40%
2
O 0.99% 0.99%
2
O 1.05% 1.04%
2
O 1.09% 1.07%
2
100% Airflow Heating 68% 60% 65% 68% 60% 65%
75% Airflow Heating 73% 67% 71% 73% 67% 71%
100% Airflow Cooling 68% 60% 63% 68% 60% 63%
75% Airflow Cooling 73% 67% 70% 73% 67% 70%
100% Airflow Heating 68% 60% 65% 68% 60% 65%
75% Airflow Heating 73% 67% 71% 73% 67% 71%
100% Airflow Cooling 68% 60% 63% 68% 60% 63%
75% Airflow Cooling 73% 67% 70% 73% 67% 70%
Shipping Weight - lbs. 2800 3000
Net Weight - lbs. 2600 2800
16 Unitary Products Group
246681-YTG-C-0611
ERV Model York Size A B C D CFM
(1238)
(203)
300-550036-072
24.75
(629)
37.9 6
(964)
8
(203)
ZF036-060
ZR036-060
24.63
(624)
600-1000036-072
(816)
(851)
C
A
Enthalpy Wheel
Intake Air Blower
VR006A06H
VR011A06H
48.75
(1238)
8
(203)
600-1000036-072
32.13
(816)
33.5
(851)
VP011A06H
-1RC0434
XP036-060
Small Sunline
Model Number York Size A B C D CFM
20.32
(516)
11
(279)
32.13
(816)
33.5
(851)
44.75
(1137)
60.38
(1533)
600-1000
1100-1700
14" High Curbs Required on "VR011" & "VP011" - 1RC0471
078-102
078-102
090-150
24" High Curbs Required on "VR028" & "VP028" - 1RC0476
(946)
24" High Curbs Required on "VR020" & "VP020" - 1RC0476
(953)
090-150
C
D
A
B
Optional Equipment
Support
Exhaust Blower
Outdoor Air
Intake Blower
Enthalpy Wheel
VR011B12H
VP011B12H
VR020B12H
VP020B12H
VR011A12H
VP011A12H
VR020A12H
VP020A12H
43.56
(1106)
42.63
(1083)
1500-2200090-150
42.63
(1083)
(1631)
18.32
(466)
090-150 2200-2800
43.56
(1106)
(1631)
18.32
(466)
VR028A12M
VP028A12M
VR028A12H
VP028A12H
20.32
(516)
11
(279)
32.13
(816)
33.5
(851)
44.75
(1137)
60.38
(1533)
600-1000
1100-1700
37.25
(946)
37.5
(953)
ZH037, 049, 061, 078, 090, 102, 120, 150
ZF078, 090, 102, 120, 150
Predator
ZR037, 049, 061, 078, 090, 102, 120, 150
XP078, 090, 102, 120, 150
14" High Curbs Required on "VR06" - 1RC0471
300-550037-061
24.75
(629)
37.9
(9
8
(203)
24.63
(624)
VR006B12H
14" High Curbs Required -
D
B
Exhaust Blower
32.13
FIGURE 4 - UERV DIMENSIONAL DATA - 036 THROUGH 060
FIGURE 5 - UERV DIMENSIONAL DATA - 037 THROUGH 150 (3 - 12 1/2 TONS)
Unitary Products Group 17
37.25
37.5
33.5
48.75
8
Model Number Unit Size A B C D CFM
1500-2200
180-300
180
180-300
180
180-300
180
180-300
180
180-300
24" High Curbs Required on "VR036" - 1RC0477 or 1RC0478
14" Roofcurbs Required on "VR028" - 1RC0436 - 437
52.68
(1338)
57.38
(1457)
ZF180, 210, 240, 300
ZR240, 300
ZJ180, 210, 240, 300
XP180, 240
46.68
(1186)
57.38
(1457)
60.00
(1524)
30.50
(775)
2800-3600
24" High Curbs Required on "VR062" - 1RC0477 or 1RC0478
3400-4600
4800-5600
5500-6200
58.88
(1496)
57.38
(1457)
57.38
(1457)
22.50
(572)
2200-2800
52.13
(1327)
24" High Curbs Required on "VR046" - 1RC0477 or 1RC0478
180
42.63
(1083)
D
A
Exhaust
Blower
Outdoor Air Intake
Blower
Enthalpy
Wheel
C
VR028A15M
VR028A15H
VR028A25M
VR036A15H
VR036A25H
VR046A15H
VR046A25H
VR062A15M
VR062A25M
VR062A15H
VR062A25H
58.88
(1496)
43.56
(1106)
60.00
(1524)
60.00
(1524)
60.00
(1524)
30.50
(775)
30.50
(775)
30.50
(775)
NOTE: Refer to Unit Price Pages for exact unit, ERV and curb matchup.
Large Sunline
246681-YTG-C-0611
B
FIGURE 6 - UERV DIMENSIONAL DATA - 180 THROUGH 300 (15 - 25 TONS)
18 Unitary Products Group
246681-YTG-C-0611
74.75
24.59
61.23
82.13
20.92
Millennium
Z32
Z33
Z34
Model Number CFM Description
VR074A40L 6000 - 8000 Constant Volume
VR074A40V 6000 - 8000 Variable Air Volume
VR122A40L 8000 - 13000 Constant Volume
VR122A40V 8000 - 13000 Variable Air Volume
- Designed to meet Millennium unit specifications
- 14’ High Curbs Required
- Rooftop unit blower exceeds the capacity of the ERV Exhaust Blowers
- See blower performance charts for airflow at various external static pressures.
FIGURE 7 - MILLENNIUM UNIT VR074 AND VR122 (25 - 40 TON)
Unitary Products Group 19
TABLE 12: BLOWER PERFORMANCE CHART - VR074
RPM Range
Low 910-1320 Standard Unit
High 1325-1565 Optional Kit (01-KIT-RH58)
RPM Range
Low 775-1000 St andard Unit
Med 1000-1200 Optional Kit (01-KIT-RM74)
High 1175-1375 Optional Kit (01-KIT-RH74)
Exhaust
Blower RPM for VR074, (2) 5HP, Barometric Hood
00.511.52
6000 910 1060 1200 1300 1400
6500 955 1095 1225 1360 1430
CFM
7000
7500
1000 1130 1260 1380 1475
1040 1170 1290 1400 1500
8000 1080 1200 1315 1425 1530
Notes:
1. Drive losses included in the above table
2. Performance can vary depending on ambient conditions
3. Blower RPMs are for reference only
TABLE 13: BLOWER PERFORMANCE CHART - VR122
Exhaust
Blower RPM for VR122, 7.5HP, Barometric Hood
00.511.52
8000
9000
CFM
10000
11000
12000 970 1070 1165 1250 1355
13000 1015 1110 1200
Notes:
1. Drive losses included in the above table
2. Performance can vary depending on ambient conditions
3. Blower RPMs are for reference only
775 900 1030 1125 1200
825 945 1055 1150 1240
875 985 1090 1190 1280
925 1030 1125 1215 1310
246681-YTG-C-0611
External Static Pressure (in water)
External Static Pressure (in water)
1280 1360
20 Unitary Products Group
246681-YTG-C-0611
UERV with Rooftop for Maximum Outside Air UERV with Horizontal Ductwork
(balancing damper field supplied)(optional balancing damper can be provided with UERV)
Balancing Damper
(field supplied)
uctwork Field
Supplied
1. Stand Alone design allows higher levels of out door air to be introduced into the a/c unit.
2. Static test ports provided to verify intake and
exhaust CFM.
3. Balancing damper is field provided when UERV
is connected to ductwork. System will not
operate properly without balancing damper.
4. Roof curbs are available for the UERV's.
5. CFM at 0.0 external static pressure.
Series Model Number
VS006 1RC0480
VS011
VS020
VS028
VS036
VS046
VS062
300-550 23.25 x 32.5 34.69 24.75 24.63 8.00 20.00 2.32 2.00 0.75 8.00
600-1000 30.25 x 43 44.25 32.13 33.50 12.00 27.00 3.25 5.00 1.56 17.00
1100-1700
35.5 x 52.75
54.38 37.25 37.50 12.00 30.00 1.63 4.00 4.06 20.32
1500-2800
41 x 49.5
52.25 42.62 43.56 14.00 32.00 1.63 4.00 4.75 22.50
2800-3600
41.81 x 55.75
46.69 6.00
3400-4600
47.81 x 55.75
52.69 6.66
4800-6200
54 x 55.75
58.88 8.21
EF I
Dimensional Data
Features and Notes
UERV Roof Curbs
Series
CFM Range Curb Size G HCD
6.03
10.32
30.5060 57.37 16.5 39.5
AB
C
A
E
B
D
VS006
VS011
VS020
VS028
VS036
VS046
VS062
1RC0481
1RC0482
1RC0483
1RC0485
1RC0486
1RC0484
9.00
13.41
D
UERV Data
UERV
F
FIGURE 8 - STAND ALONE UERV’S FOR SIDE BY SIDE DUCT ARRANGEMENTS
Unitary Products Group 21
G
D
H
1. Stand Alone design allows higher levels of out-
door air to be intr oduced into the a/c unit.
2. Static test ports provided to verify intake and
exhaust CFM.
3. Balancing damper field supplied.
eries
odel No
1RC0480
1RC0481
1RC0482
1RC0483
1RC0484
1RC0485
1RC0486
UERV
Series
CFM Range
Curb Size
JxK)
ABCDEFGH I
300-550 23.25 x 32.5 34.83 24.75 24.63 8.00 20.00 2.00 2.25 2.32 8.00
30.25 x 43 44.75 32.13 33.50 12.00 27.00
Features and Notes
4. Roof curbs are available for the UERV's.
600-1000
UERV with Horizontal Ductwork
UERV Roof Curbs
Dimensional DataUERV Data
2.60 5.00 2.56 11.00
18.3239.50 8.00 3.59
18.32
2800-3600
41.81 x 55.75
4.00 5.3152.25 42.63 43.56 14.00
20.3252.38 37.25 37.50 12.00 30.00 4.50 4.00 3.63
8.19
57.37 16.50
32.00 4.75
8.19
39.50 8.19
57.37 16.5060.00
54 x 55.75 60.00 58.88
60.00 52.69
46.69
1100-1700
1500-2800
3400-4600 47.81 x 55.75
41 x 49.5
35.5 x 52.75
18.32
8.00 9.68 18.32
8.00 6.59
4800-6200 57.37 16.50 39.50
Ductwork Field
Supplied
A
F
D
E
B
C
B
A
J
K
VO006
VO011
VO020
VO028
VO036
VO046
VO062
5. CFM is based on 0 external static pressure.
VO006
VO011
VO020
VO028
VO036
VO046
VO062
S
M
246681-YTG-C-0611
D
C
14
H
(
FIGURE 9 - STAND ALONE UERV’S FOR OVER AND UNDER DUCT ARRANGEMENTS
22 Unitary Products Group
246681-YTG-C-0611
GUIDE SPECIFICATIONS
Prepared for the guidance of architects, consulting engineers, and mechanical contractors.
GENERAL
Furnish and install _____________ mechanical cooling system, complete with a Unitized Energy Recovery Ventilator
(UERV).
APPROVALS
The Unitized Energy Recovery Ventilator will contain an
energy recovery component rated in accordance with AHRI/
ANSI Standard 1060-2005 with ratings certified by AHRI.
Cabinet
UERV shall be designed to attach directly to the a/c (rooftop,
upflow, horizontal) unit. It shall be G90 galvanized material
with a powdered enamel paint finish electrostatically bonded
to the metal. Cabinet panels where conditioned air is handled
shall be fully insulated to prevent sweating and minimize
sound. Openings shall be provided for power connections.
Lifting devices will be provided for rigging. Test ports shall be
provided so airflow can be measured across the energy
recovery wheel.
Intake Air Blower (direct drive)
UERV shall contain a centrifugal blower. All UERV's will be
equipped with direct drive PSC blower motors. The motor will
be multiple speed and will be individually controlled. Airflow
will also be adjustable by means of a damper on the intake air
opening. Blowers and motors will be removable through
means of a connecting plug for ease of servicing.
Intake Air Blower (belt drive)
UERV shall contain a centrifugal blower. It shall have ball
bearings and adjustable belt drive. Motor mount base shall
permit ease of motor changeover and belt tension adjustment. On pivoting wheel models, supply blower will be deenergized during economizer operation. (Except for VR074
and VR122.)
Exhaust Air Blower (direct drive)
UERV shall contain a centrifugal blower. All UERV's will be
equipped with direct drive PSC blower motors. The motor will
be multiple speed and shall be individually controlled. Blowers and motors will be removable through means of a connecting plug for ease of servicing. On pivoting wheel models,
blower shall be sized to provide power exhaust during economizer operation.
Exhaust Air Blower (belt drive)
sized to provide power exhaust during economizer operation.
Where single blowers cannot provide adequate exhaust, two
blowers will be utilized. One blower is energized during
energy recovery mode, and both blowers are energized during economizer mode.
Energy Recovery Wheel
The energy recovery device shall be a rotary heat exchanger
per AHRI Standard 1060 description. The device will be an
enthalpy wheel coated with a silica gel desiccant by a patented process without the use of binders or adhesives which
may plug the desiccant aperture. The substrate shall be a
lightweight polymer. Desiccant shall not dissolve or deliquesce in the presence of water or high humidity. The wheel
shall be easily cleanable with standard coil cleaning solution.
On UERV's Series 20 and less, the wheel will easily be
removable from the cabinet for cleaning. On UERV's Series
20 and above, the wheel will be provided with removable segments for cleaning and maintenance. All diameter and perimeter seals shall be provided. The energy recovery cassette
shall be Underwriters Laboratories Recognized Component
for electrical and fire safety.
Balancing Dampers
Balancing dampers will be provided for all VR UERV’s. These
dampers will be mounted inside the rooftop air conditioning
unit to adjust for the amount of exhaust air on packaged units.
On pivoting wheel models, the unit econ o mi z er becomes the
balancing damper. Upflow and horizontal ERVs' will have the
balancing damper provided in the ERV. Optional on VO and
VS UERV’s when connected to rooftop units. (Except for
VR074 and VR122.)
Barometric Relief Dampers
Barometric relief dampers will be provided in the exhaust air
hood to prevent air infiltration when the UERV is de-energized.
ERV Support
All UERV's will be provided with support legs attached to the
cabinet to support the intake and exhaust end of the ERV
unit. Horizontal ERV's will be provided with support brackets
for hanging.
Filters
All units shall be provided with mist eliminator type filters in
the intake air hood.
Power Connection
The UERV shall be provided with a single point power connection for high voltage.
UERV shall contain a centrifugal blower. It shall have ball
bearings and adjustable belt drive. Motor mount base shall
permit ease of motor changeover and belt tension adjustment. On pivoting wheel models, exhaust blowers shall be
Unitary Products Group 23
OPTIONS
Optional UERV Equipment Support
246681-YTG-C-0611
Furnish and install the optional equipment support for the
intake and exhaust end of the unit.
Optional Roof Curb
Furnish and install the optional roof mounting frame to maintain proper height above the roof.
Optional Low Ambient Kit
Furnish and install the optional low ambient kit to prevent
frost formation on the energy recovery wheel.
Optional Motorized Intake Air Damper
Furnish and install the optional motorized intake air damper.
Optional Stop-Start-Jog
On units without economizers furnish and install the optional
stop-start-jog controls.
SEQUENCE OF OPERATION:
Fixed Models - Normal Operation
1. The space thermostat sends a signal to the RTU for cooling, heating or fan only operation.
2. The ERV is activated simultaneously with the supply
blower of the RTU. The intake blower, the exhaust
blower, and the wheel rotation motor of the ERV are activated. These motors will remain energized as long as
the supply blower on the RTU is energized. The RTU is
in standard (non-economizer) mode.
3. If the optional motorized fresh air damper in the outside air intake of the ERV is present, it opens and the ERV is energized.
4. If the optional low ambient kit is present, and the temperature leaving the exhaust side of the wheel drops below
the field adjusted set point on the temperature sensor of
the low ambient kit, the optional motorized fresh air
damper will close and the intake blower will de-energize.
The exhaust air blower and wheel rotation motor will continue to operate. When the temperature sensor has a
sixteen-degree rise, the wheel is defrosted and the
optional motorized damper will open and the fresh air
blower will reactivate.
2. The ERV is activated with the supply blower of the RTU.
The intake blower, the exhaust blower, and the wheel
rotation motor of the ERV are activated. These motors
will remain energized as long as the supply blower on
the RTU is energized and the RTU is in standard (noneconomizer) mode.
3. If the optional motorized fresh air damper in the outside air intake of the ERV is present, it opens and the ERV is energized.
4. If the optional low ambient kit is present, and the temperature leaving the exhaust side of the wheel drops below
the field adjusted set point on the temperature sensor of
the low ambient kit, the optional motorized fresh air
damper will close and the intake blower will de-energize.
The exhaust air blower and wheel rotation motor will continue to operate. When the temperature sensor has a
sixteen-degree rise, the wheel is defrosted and the
optional motorized damper will open and the fresh air
blower will reactivate.
Pivoting Models - Economizer Operation
1. The space thermostat sends a signal to the RTU for cooling operation.
2. The outdoor air sensor for the RTU senses the outdoor
air and determines it is appropriate for economizer operation.
3. As the economizer outside air dampers open, the ERV economizer end switch is activated sending a signal to the ERV that the system is in the economizer mode.
4. The intake blower, the exhaust blower and the wheel rotation motor all deactivate for up to two minutes. The optional motorized fresh air damper (if present) also closes.
5. The ERV enthalpy wheel pivots out of the air stream and the bypass dampers along each side of the intake blower open.
6. After a time delay to allow the wheel to pivot out of the
airstream and the bypass dampers to open, the optional
motorized fresh air damper opens to allow for full economizer operation, and the exhaust blower is reactivated to
provide power exhaust for the system.
Pivoting Models - Normal Operation
1. The space thermostat sends a signal to the RTU for cooling, heating or fan only operation.
24 Unitary Products Group
246681-YTG-C-0611
UERV TROUBLESHOOTING GUIDE
UERV BELOW 600 CFM WITH ST A TIONARY WHEEL (NO ECONOMIZER)
UERV will not operate.
1. Quick check items. a. Verify S51 door switch is closed. The switch must be
in the closed position to power the A130 circuit
board.
b. Verify the A130 circuit board switch SW1 Power is in
the “on” position.
c. Verify 24 volts to A130 circuit board terminals TB1
“G” and “C” if in the cooling mode, or “W” and “C” if
in the heating mode. The terminals must be powered to allow any blower relays / contactors to operate.
2. Verify high voltage power to UERV. a. Verify 110 volts for UERV to L1 and L2 on TB2 on
the A130 board.
b. Verify the F1 fuse is good. Replace any bad fuses.
c. Verify that the T28 step down transformer on 208,
230, and 460 volt units have the voltage correctly
applied to the correct transformer terminals.
UERV has power, but the enthalpy wheel does not spin.
1. Check wheel belt is in place and tight.
2. Verify the A130 circuit board switch SW1 Power is in the "on" position.
3. Verify the A130 circuit board terminals Wheel "1" and "2" are outputting 110 volts to B28 wheel motor through J/ P150 plug assembly.
4. Verify B28 wheel motor C23 capacitor is good. Replace the capacitor if it is bad.
5. If the optional Stop, Start, Jog (SSJ) feature is installed, verify that the temperature setpoint on the SSJ does not have the wheel stopped.
6. If all of the above are operational, the wheel motor is bad. Replace it with new motor.
3. Verify B26 wheel motor C25 capacitor is good. Replace the capacitor if it is bad.
4. If all of the above are operational, the exhaust motor is bad. Replace it with new motor.
UERV has power, but the fresh air blower does not
operate.
1. Verify the A130 circuit board switch SW1 Power is in the "on" position.
2. Verify the A130 circuit board terminals Fresh "1” and "3" if in high speed operation, or "1” and "2" if in low speed operation are outputting 110 volt s to B27 fresh air blower motor though J/P148 plug assembly.
3. On units equipped with the optional low ambient control,
verify that the A130 circuit board TB3 terminals marked
"low ambient" are closed. The low ambient control will
stop the fresh air motor operation and close the optional
outside air damper if it senses conditions for frost on the
UERV wheel. The "low ambient" terminals can be
jumped together to verify if the low ambient control has
the fresh air blower stopped.
4. Verify B27 wheel motor C26 capacitor is good. Replace the capacitor if it is bad.
5. If all of the above are operational, the fresh air motor is bad. Replace it with new motor.
UERV has power, but the optional motorized fresh air
damper does not open.
1. Verify 24 volts to A130 circuit board terminals TB1 "G" and "C" if in the cooling mode, or "W" and "C" if in the heating mode.
2. Verify the A130 circuit board switch SW1 Power is in the "on" position.
3. Verify 24 volts to B30 motorized outdoor air motor through J/P160 plug assembly.
4. If all of the above are operational, replace the outdoor air damper motor.
UERV ABOVE 600 CFM WITH ST ATIONARY WHEEL (NO ECONOMIZER)
UERV has power, but the exhaust blower does not
operate.
1. Verify the A130 circuit board switch SW1 Power is in the "on" position.
2. Verify the A130 circuit board terminals Exhaust "1” and "3” if in high speed operation, or "1” and "2" if in low speed operation are outputting 110 volts to B26 exhaust blower motor though J/P151 plug assembly.
Unitary Products Group 25
UERV will not operate.
1. Quick check items. a. Verify S51 door switch is closed. The switch must be
in the closed position to power the A130 circuit
board.
246681-YTG-C-0611
b. Verify 24 volts to A130 circuit board terminals
XFORMER "+" and "-". The terminals must be powered to allow blower contactors to operate.
c. Verify 24 volts to A130 circuit board terminals TB 37
numbers "1" and "3". T erminal "1" is the hot and "3"
is the common side of the power source fr om activa tion power source (a/c unit, energy management
control, etc.). Typically, "1" would be from the blower
contactor on an a/c unit.
2. Verify high voltage power to UERV. a. Check for correct voltage for UERV to L1 and L2 on
1-phase units.
b. Check for correct voltage for UERV to L1, L2, and
L3 on 3-phase units.
c. Verify the F29 fuses are good. Replace any bad
fuses.
d. Verify that the T27 transformer has the UERV volt-
age correctly applied to the correct transformer terminals.
UERV has power, but the enthalpy wheel does not spin.
1. Check wheel belt is in place and tight.
2. Verify the A130 circuit board terminals Exhaust "A" (hot)
and "B" (common) are outputting 24 volts to K163 contactor terminal "A" and "B" and that the contacts are
closed.
3. Verify power to B28 wheel motor.
4. Verify B28 wheel motor C23 capacitor is good. Replace the capacitor if it is bad. (Except VR074 to VR122)
5. If the optional Stop, Start, Jog (SSJ) feature is installed, verify that the timer on the SSJ does not have the wheel stopped.
6. If all of the above are operational, the wheel motor is bad. Replace it with new motor.
UERV has power, but the exhaust blower does not
operate.
1. Check that the blower belt is in place and tight on belt drive models. If it is loose, tighten it. If it is broken replace it.
2. Verify the A130 circuit board terminals Exhaust "A" (hot)
and "B" (common) are outputting 24 volts to K163 contactor terminal "A" and "B", and that the contacts are
closed.
3. Verify power to B26 exhaust blower motor.
4. On direct drive models, verify B26 wheel motor C25 capacitor is good. Replace if necessary.
5. If all of the above are operational, the exhaust motor is bad. Replace it with new motor.
UERV has power, but the fresh air blower does not
operate.
1. Check that the blower belt is in place and tight on belt
drive models. Tighten it if it is loose. Replace it if it is broken.
2. Verify the A130 circuit board terminals Fresh "A" (hot)
and "B" (common) are outputting 24 volts to K164 contactor terminal "A" and "B", and that the contacts are
closed.
3. Verify power to B27 fresh air blower motor though J/ P148 plug assembly.
4. On direct drive models, verify B27 wheel motor C26 capacitor is good. Replace if necessary.
5. On units equipped with the optional low ambient control,
verify that the circuit on the A130 circuit board terminal
"5" and "6" is closed. The low ambient control will stop
the fresh air motor operation and close the optional outside air damper if it senses frost on the UERV wheel.
Terminal "5" and "6" can be jumped to gether to verify if
the low ambient control has the fresh air blower stopped.
6. If all of the above are operational, the fresh air motor is bad. Replace it with new motor.
UERV has power, but the optional motorized fresh air
damper does not open.
1. Verify 24 volts to the A130 circuit board terminals XFORMER "+" and "-".
2. Verify 24 volts to A130 circuit board terminals TB 37
numbers "1" and "3". T erminal "1" is the hot and "3" is the
common side of the power source from activation power
source (a/c unit, energy management control, etc.). Typically, "1" would be from the blower contactor on an a/c
unit.
3. Verify 24 volts to B30 motorized outdoor air motor through J/P160 plug assembly.
4. If all of the above are operational, replace the outdoor air damper motor.
UERV ABOVE 600 CFM WITH PIVOTING WHEEL (USED WITH ECONOMIZER)
UERV will not operate.
1. Quick check items. a. Verify S51 door switch is closed. The switch must be
in the closed position to power the A130 circuit
board.
26 Unitary Products Group
246681-YTG-C-0611
b. Verify 24 volts to A130 circuit board terminals
XFORMER "+" and "-". The terminals must be powered to allow any blower relays / contactors to operate.
c. Verify 24 volts to A130 circuit board terminals TB 37
numbers "1" and "3". T erminal "1" is the hot and "3"
is the common side of the power source fr om activa tion power source (a/c unit, energy management
control, etc.). Typically, "1" would be from the blower
contactor on an a/c unit.
2. Verify high voltage power to UERV. a. Check correct voltage for UERV to L1 and, L2 on 1-
phase units.
b. Check for correct voltage to L1, L2, and L3 on 3-
phase units.
c. Verify the F29 fuses are good. Replace any bad
fuses.
d. Verify that the T27 transformer has the UERV volt-
age correctly applied to the correct transformer terminals.
UERV has power, but the enthalpy wheel does not spin.
1. Check wheel belt is in place and tight.
2. Verify the A130 circuit board terminals Exhaust 1 "A" (hot) and "B" (common) are outputting 24 volts to K163 contactor terminal "A" and "B" and that the contacts are closed.
3. Verify power to B28 wheel motor through J/P150 plug assembly.
a. If there is no power on the T1 leg of the motor (pivot-
ing models only) verify that the S110 switch located
inside the B29 damper motor is in the closed position.
4. Verify B28 wheel motor C23 capacitor is good. Replace the capacitor if it is bad.
5. If all of the above are operational, the wheel motor is bad. Replace it with new motor.
UERV has power, but the exhaust blower does not
operate.
1. Check that the blower belt is in place and tight. If it is loose, tighten it. If it is broken replace it.
4. On direct drive models, verify B26 wheel motor C25 capacitor is good. Replace if necessary.
5. If all of the above are operational, the exhaust motor is bad. Replace it with new motor.
UERV has power, but the fresh air blower does not
operate.
1. Energy Recovery Mode of operation. a. Check that the blower belt is in place and tight on
belt drive models. Tighten it if it is loose. Replace it if
it is broken.
b. Verify the A130 circuit board terminals Fresh "A"
(hot) and "B" (common) are outputting 24 volts to
K164 contactor terminal "A" and "B", and that the
contacts are closed.
c. Verify power to B27 fresh air blower motor though J/
P148 plug assembly.
d. On units equipped with the optional low ambient
control, verify that the circuit on the A130 circuit
board terminal "5" and "6" is made. The low ambient
control will stop the fresh air motor operation and
close the optional outside air damper if it senses
frost on the UERV wheel. Terminal "5" and "6" can
be jumped together to verify if the low ambient control has the fresh air blower stopped.
e. On direct drive models, verify B27 wheel motor C26
capacitor is good. Replace if necessary.
f. If all of the above are operational, the fresh air motor
is bad. Replace it with new motor.
2. Economizer Mode of operation. a. The fresh air blower is not operational in the econo-
mizer mode.
UERV has power, but the wheel does not rotate out of
airstream during economizer operation.
1. Check the linkage from the B29 damper motor to the UERV wheel.
2. Verify shipping retainers are removed.
3. Verify the S122 economizer end switch is closed. The switch is located on the damper and closes when the damper moves from minimum position to the economizer position (field adjustable).
2. Verify the A130 circuit board terminals Exhaust 1 "A" (hot) and "B" (common) are outputting 24 volts to K163 contactor terminal "A" and "B", and that the contacts are closed.
3. Verify power to B26 exhaust blower motor though J/P151 plug assembly.
Unitary Products Group 27
4. Verify the B29 damper motor has 24 volts to terminals "B" and "T1" through J/P160 plug assembly
5. If all of the above are operational, replace the damper motor.
UERV has power, but the optional motorized fresh air
damper does not open.
1. Verify 24 volts to the A130 circuit board terminals XFORMER "+" and "-".
2. Verify 24 volts to A130 circuit board terminals TB 37
numbers "1" and "3". Terminal "1" is the "hot" and "3" is
the "common" side of the power source from activation
power source (a/c unit, energy management control,
etc.). Typically, "1" would be from the blower contactor
on an a/c unit.
3. Verify 24 volts to B30 motorized outdoor air motor through J/P160 plug assembly.
4. If all of the above are operational, replace the outdoor air damper motor.
Subject to change without notice. Printed in U.S.A. 246681-YTG-C-0611
Copyright © August 26, 2011 by Johnson Controls, Inc. All rights reserved. Supersedes: 246681-YTG-B-0607
Johnson Controls Unitary Products
5005 York Drive
Norman, OK 73069
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