5
ATH15-520.2
Rigging Instructions
Four 1.5" eye bolts at the top of the unit in each corner are
supplied to facilitate lifting the unit. For either crane or helicopter
lift of the equipment to the rooftop, connect sturdy steel cables
or chains with eye loops as illustrated in Figure 5.1. For stability
in lifting and lowering and to prevent damage to the eye bolt
lifting points, include a spreader bar as illustrated in Figure 5.1.
RIGGING INSTRUCTIONS / UNIT INSTALLATION
Figure 5.1 - Typical Rigging for ERM Unit
Unit Installation
Follow site preparation instructions for the roof curb before
installation. Check the Serial Plate of unit with plans to be sure
unit is properly located (see page 15). Although units may
look outwardly similar, their function, capacities, options, and
accessories will often vary. Check dimensions.
The MPR unit must already be installed on its curb following the
instructions in the Installation and Service Manual that shipped
with the MPR unit. This must be completed prior to installation
of the ERM unit.
If unit is to be installed on a factory-supplied curb:
1. The roof curb and the MPR unit must be installed prior to
the installation of this ERM unit.
2. Install roof curb using instructions on page 4.
3. Thoroughly clean and dry the top of the curb surface.
4. Place the factory supplied gasketing on the top perimeter
of the roof curb and place a bead of weather resistant
caulk on the flange of the factory installed ERM to MPR
unit transition duct.
5. Orient the hoisted unit so the transition ductwork is lined up
with the inlet of the MPR unit and set it down evenly
on curb.
6. Secure the transition duct to the MPR unit using the 28
sheet metal screws provided through the pre-drilled holes
in the transition duct flange.
7. Make final unit connections to the electric power supply
and remote control circuits.
EXHAUST AIR
GRAVITY DAMPER
& OUTLET HOOD
RAINHOOD
ACCESSORY
(FIELD INSTALL)
(4) 1.50" LIFTING EYE BOLTS
(EACH CORNER OF UNIT)
SPREADER BAR
AND LIFTING CHAINS
BY INSTALLER
ADJUST CHAIN
LENGTH SO UNIT IS
LEVEL WHEN LIFTED
THE MAIN UNIT MUST BE
INSTALLED BEFORE THE
ENERGY RECOVERY UNIT
CAULK FLANGE OF DUCT
TRANSITION PRIOR TO
CONNECTION TO THE MAIN UNIT
INLET AIR
END VIEW
75°
APPROX.
IF SEPARATE FACTORY SUPPLIED
ROOF CURBS ARE USED, REFER
TO THE INSTALLATION INSTRUCTIONS
SHIPPED WITH THE CURBS FOR
PROPER PLACEMENT.
