Greenheck ERCH - Energy Recovery Unit with Packaged DX (468151) - Manual (Page 4)

4
Energy Recovery Unit with Packaged DX
INSTALLATION
The system design and installation should follow accepted industry
practice, such as described in the ASHRAE Handbook .
Adequate space should be left around the unit for piping coils and drains,
filter replacement, and maintenance . Sufficient space should be provided
on the side of the unit for routine service and component removal should
that become necessary .
See Service Clearances/Access Panel Locations section for more details .
LIFTING
1) Before lifting, be sure that all shipping material has been
removed from unit .
2) To assist in determining rigging requirements, weights are
shown below .
3) Unit must be lifted by all lifting lugs provided on base
structure .
4) Rigger to use suitable mating hardware to attach to unit
lifting lugs .
5) Spreader bar(s) must span the unit to prevent damage to
the cabinet by the lift cables .
6) Always test-lift the unit to check for proper balance and
rigging before hoisting to desired location .
7) Never lift units by weatherhoods .
8) Never lift units in windy conditions .
9) Preparation of curb and roof openings should be completed
prior to lifting unit to the roof .
10) Check to be sure that gasketing (supplied by others) has
been applied to the curb prior to lifting the unit and setting
on curb .
11) Do not use fork lifts for handling unit .
Lift using lifting lugs
and spreader bar
UNIT WEIGHTS & RECOMMENDED ROOF OPENING
SUPPLY
DISCHARGE
EXHAUST
INTAKE
U
V
1/2 inch
1/2 inch
SAFETY WARNING
All factory provided lifting
lugs must be used when
lifting the units . Failure to
comply with this safety
precaution could result in
property damage, serious
injury, or death .
Unit weights assume rooftop configuration with weatherhoods, filters,
outdoor air damper, six row DX coil, integral condensing section and
an indirect gas fired furnace .
Unit
Size
Approximate
Weight (lbs)
U
(inches)
V
(inches)
ERCH-20 2150 46 46
ERCH-45 3500 54 48
ERCH-55 4450 65 58
ERCH-90 6200 85 63
CAUTION!
Unit is designed for Outdoor installation only . Follow all guidelines in this manual for proper installation .
HANDLING
While this unit was constructed with quality and dependability in mind, damage still may occur during
handling of the unit for installation . Exercise extreme caution to prevent any damage from occurring to the
refrigerant system . This unit contains a system pressurized with refrigerant that if damaged, could leak into
the atmosphere or cause bodily harm due to the extreme cold nature of expanding refrigerant . Use protective
equipment such as gloves and safety glasses to minimize or prevent injury in case of a system leak during
installation .
Position the unit roof opening such that the supply discharge and exhaust inlet of the unit will line up with the
corresponding ductwork . Be sure to allow for the recommended service clearances when positioning opening
(see Service Clearances) . Do not face the outdoor air intake of the unit into prevailing wind and keep the intake
away from any other exhaust fans . Likewise, position the exhaust discharge opening away from outdoor air
intakes of any other equipment .