Instruction manual

THE SMART SOLUTION FOR ENERGY EFFICIENCY
W (ERV) Series
Rev.: 15 May, 2015
3
climatemaster.com
Installation
1. Attach duct work to duct fl anges on ERV.
2. Remove ERV control access panel to connect fi eld
wiring.
3. Route class II low voltage wire (3 conductor) from
thermostat or energy management through small
bushing in end panel of ERV. See wiring diagram.
a. Thermostat (dependent) - connect in parallel at
rooftop unit with “G”, “C” and “W”. Then connect
matching color at terminal 1, 2, and 3 respectively
on ERV circuit board.
b. Energy Management - provide +24 VAC to “1” and
common, 24 VAC to “2’ terminals on ERV circuit
board.
c. Thermostat (dedicated) - splice into +24 vac
(blue wire) at (control circuit board) transformer
connection run wire to “R” terminal. Then run
another wire from “G” terminal to ERV (control
circuit board) terminal block #1.
4. All electrical connections must conform to any local
codes and current National Electric Codes (NEC) and
Canadian Electric Codes (CEC). Refer closely to unit
wiring diagram in unit and/or in these instructions for
proper wiring connections.
5. Refer to the unit nameplate for minimum circuit
ampacity (MCA) and maximum overcurrent protection
size (fuse).
6. Electrical data is listed on unit rating plate and motor
name plates.
7. Connect line voltage power supply to ERV fuse block
in control box of unit from disconnect switch. See
wiring diagram.
 CAUTION! 
CAUTION! Blower speed must be adjusted for the given
external static pressure and airfl ow (CFM) requirements. If
blower speed is not adjusted for conditions, possible motor
over loading can occur.
8. Ground unit with a suitable ground connection either
through unit supply wiring or an earth ground.
NOTE: Unit voltage entries must be sealed
weather tight after wiring is complete.
9. Remove motor access panels. Locate belts fastened
to blower assembly. Install belt onto motor and blower
pulley. Adjust motor sheave to correct blower RPM for
CFM and external static pressure requirements. See
charts in this instruction. Multiple pulley arrangements
are available to meet the entire range.
10. Replace access panel onto the ERV unit and secure.
11. Restore power to unit.
12. Cleanup once unit is operating properly, caulk
any open joints, holes or seams to make the units
completely air and water tight.
13. Leave this instruction manual with owner or in an
envelope to be kept near unit.
Operation
(How It Works)
The unit contains an Energy Recovery Wheel (ERW)
that is a new concept in rotary air-to-air heat exchangers.
Designed as a packaged unit for ease of installation and
maintenance, only the connection of electrical power is
required to make the system operational.
When slowly rotating through counter fl owing exhaust
and fresh air streams the ERW adsorbs sensible heat
and 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. Rotating at 50-60
revolutions per minute, the wheel provides constant fl ow
of energy from warmer to cooler air stream. The large
energy transfer surface and laminar fl ow through the
wheel causes this constant fl ow of recovered energy
to represent up to 85% of the difference in total energy
contained within the two air streams.
Sensible and latent heat are the two components of total
heat. Sensible heat is energy contained in dry air and
latent heat is the energy contained within the moisture
of the air. The latent heat load from the outdoor fresh air
on an air conditioning system can often be two to three