MAXA-MISER VR028A12M Installation Instructions Manual

Unitary energy recovery ventilator

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INSTALLATION
INSTRUCTIONS
I - Ship ping And Pack ing List
Package 1 of 1 contains:
1 - Energy Recovery Ventilator
1 - Outdoor Fresh Air Hood with Filter
1 - Outdoor Exhaust Air Hood with Barometric
Damper
1 - Adapter Panel Assembly
1 - Balancing Damper Assembly
1 - Top Filler Panel
1 - Bag Assembly
1 - Roll of ¾" x 1 ¼" gasket
1 - 272" of
" x ½" gasket
1
8
1 - Field Wiring Harness for Low Voltage
- Self-tapping screws
- Gold Screws
- Installation Instructions
II - Ship ping Dam age
Check unit for shipping damage. Receiving party should
contact last carrier immediately if shipping damage is
found.
III - Gen eral
These instructions are intended as a general guide and do
not supersede local codes in any way. Authorities having
jurisdiction should be consulted before installation.
IV - Re quire ments
When installed, the unit must be electrically wired and
grounded in accordance with local codes or, in the
absence of local codes, with the current National Electric
Code, ANSI/NFPA No. 70.
V - Ap pli ca tion
Unitary Energy Recovery Ventilator (UERV) are used with
3 to 6 ton rooftop units equipped with a balancing
damper assembly. These wheels conserve energy by
mixing warmer air with cooler air in the following manner:
Re cov ery Wheel Mode
The Recovery Wheel mode is accomplished by two
blowers providing continuous exhaust of stale indoor air
and replacement by equal amount of outdoor air. Energy
recovery is achieved by slowly rotating the energy
recovery wheel within the cassette frame work. In winter,
the UERV adsorbs heat and moisture from the exhaust air
stream during one half of a complete rotation and gives
them back to the cold, drier intake air supply during the
other half rotation. In summer, the process is automatically
reversed. Heat and moisture are absorbed from incoming
fresh air supply and transferred to the exhaust air stream.
This process allows outdoor air ventilation rates to be
increased by factors of three or more without additional
energy penalty or increase in size of heating or air
conditioning systems.
UNITARY ENERGY RECOVERY VENTILATOR
MODEL VR028A12M & A12H (STATIONARY)
E n e r g y r e c o ve r y C O M P O N E N T
certified to the AHRI Air-to-Air Energy
Recovery Ventilation Equipment
Certification Program in accordance
w ith AHRI Standard 1060-2000.
Actual performance in packaged
equipment may vary.
MAXA-MI$ER
035-19264-002-A-0709 / R28A-29YDW
VI - Rig ging Unit For Lift ing
1. Maximum weight of unit is —- 775 Lbs.[Crated].
2. Remove crating. Then remove access panel to
retrieve bag assembly. Replace access panel.
3. All panels must be in place for rigging.
4. Lifting lugs are supplied with the unit. Loosen machine
bolts and rotate lifting lug
WARNING
Electric shock hazard. Can cause injury
or death. Before attempting to perform
any service or maintenance, turn the
electrical pow er to unit OFF at
disconnect switch(es). Unit may have
multiple power supplies.
CAUTION
Danger of sharp metallic edges. Can cause injury.
Take care when servicing unit to avoid accidental
contact with sharp edges.
VII - In stal la tion
1. Disconnect all power to the rooftop unit.
2. Remove return air access panels. Also remove any
hoods and/or power exhaust equipment. See Figure
1.
ETL Certified per UL 1995
and CSA 22.2

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Summary of Contents for MAXA-MISER VR028A12M

  • Page 1 MAXA-MI$ER INSTALLATION UNITARY ENERGY RECOVERY VENTILATOR MODEL VR028A12M & A12H (STATIONARY) INSTRUCTIONS 035-19264-002-A-0709 / R28A-29YDW E n e r g y r e c o ve r y C O M P O N E N T certified to the AHRI Air-to-Air Energy...
  • Page 2: Installation

    MAXA-MI$ER INSTALLATION UNITARY ENERGY RECOVERY VENTILATOR MODEL VR028A12M & A12H (STATIONARY) INSTRUCTIONS 035-19264-002-A-0709 / R28A-29YDW 3. Locate the provided low voltage field wiring harness. The field harness should plug into the economizer plug in the upper corner of the return air access. See Figure 2.
  • Page 3 MAXA-MI$ER INSTALLATION UNITARY ENERGY RECOVERY VENTILATOR MODEL VR028A12M & A12H (STATIONARY) INSTRUCTIONS 035-19264-002-A-0709 / R28A-29YDW 16. All electrical connections must conform to any local codes and the current National Electric Codes (NEC) and Canadian Electric Code (CEC). Refer closely to wiring diagram in unit and/or in these instructions for proper connections.
  • Page 4 MAXA-MI$ER INSTALLATION UNITARY ENERGY RECOVERY VENTILATOR MODEL VR028A12M & A12H (STATIONARY) INSTRUCTIONS 035-19264-002-A-0709 / R28A-29YDW When slowly rotating through counter flowing exhaust and fresh air streams the UERV adsorbs sensible heat and TOP FILLER PANEL latent heat from the warmer air stream and transfer this total energy to the cooler air stream during the second half of its rotating cycle.
  • Page 5: Installation Instructions

    MAXA-MI$ER INSTALLATION UNITARY ENERGY RECOVERY VENTILATOR MODEL VR028A12M & A12H (STATIONARY) INSTRUCTIONS 035-19264-002-A-0709 / R28A-29YDW B - Blower Speed Ad just ment SEGMENT RETAINER CATCH Blower speed selection is accomplished by changing the SEGMENT RETAINER sheave setting on both fresh air and exhaust air blowers.
  • Page 6 ENERGY RECOVERY VENTILATOR SCFM vs. PRESSURE DROP R28 Series 1100 RPM 1000 RPM 900 RPM 800 RPM 1.40 1.31 1.31 1.30 1.30 1.28 1.26 1.20 1.20 1.13 1.09 1.09 1.09 1.08 1.05 1.04 1.00 1.00 0.99 0.93 0.90 0.89 0.88 0.87 0.85 0.85...
  • Page 8 COM PO NENT CODE UERV UNIT SCHE MATIC DIAGRAM A131 Fixed Re lay Board Mo tor, Ex haust Air Mo tor, Fresh Air Mo tor, Des ic cant Wheel Mo tor, Damper (Op tional) Ca paci tor, Wheel Mo tor DL43 De lay, Cy cle Timer (Op tional) Fuse...
  • Page 9 UERV UNIT WIR ING DIAGRAM Notes: Remove jumper to install field optional low ambient switch. Step-down transformer assembly for 460 volt units. Selective voltage terminal for proper unit voltage Optional low ambient switch. Optional motorized intake damper. Des ic cant Wheel for Roof top Unit Optional stop, start and jog control.
  • Page 10: Equip Ment Lay Out

    EQUIP MENT LAY OUT...
  • Page 11: Installation Checklist

    START UP INFORMATION SHEET VOLTAGE - UERV UNIT In com ing Volt age L1-L2 L1-L3 L2-L3 Run ning Volt age L1-L2 L 1-L3 L2-L3 Sec ond ary Volt age C (black) to G (green) Volts* C (black) to W (white) Volts* * With ther mo stat call ing.
  • Page 12 NOTES Supercedes: 035-19264-001-A-1108 035-19264-002-A-0709 Sub ject to change with out no tice. Printed in U.S.A. R28A-29YDW Copy right © by Uni tary Prod ucts Group 2005. All rights re served. Unitary 5005 Norman Products York Group Drive 73069...

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